Receive End and Transmit End of Wireless Charging System, and Wireless Charging System

A receive end and a transmit end of a wireless charging system, and the wireless charging system, where the receive end includes a receive coil, a rectifier, and a receive end controller, where the receive coil receives an alternating magnetic field and outputs an alternating current, the rectifier is configured to rectify the alternating current from the receive coil into a direct current, the receive end controller is configured to adjust, based on a target impedance sent by a transmit end controller, a reflection impedance reflected from the receive end to a transmit end such that an inverter of the transmit end implements a zero voltage switching (ZVS), and a bridge arm voltage is a voltage between two bridge arm midpoints of a full bridge rectifier or a voltage between a single bridge arm midpoint of a half bridge rectifier and ground. 1. A receive end of a wireless charging system comprising: receive an alternating magnetic field; and', 'output an alternating current;, 'a receive coil configured to a first voltage between two bridge arm midpoints of the rectifier when the rectifier is a full bridge rectifier; and', 'a second voltage between a single bridge arm midpoint of the rectifier and a ground when the rectifier is a half bridge rectifier; and, 'a rectifier coupled to the receive coil and configured to rectify the alternating current into a direct current, wherein a bridge arm voltage of the rectifier is receive a target impedance from a transmit end controller; and', 'adjust, based on the target impedance, a reflection impedance reflected from the receive end to a transmit end to enable an inverter of the transmit end to implement a zero voltage switching (ZVS)., 'a receive end controller configured to2. The receive end of claim 1 , wherein the receive end controller is further configured to:obtain a target input impedance of the rectifier based on the target impedance;obtain an equivalent input impedance of the rectifier;compare the target input ...

Luminous LED ball bubble lamp of axial symmetry

The utility model discloses a luminous LED ball bubble lamp of axial symmetry, it includes a lamp shade, a base plate and a base, the base plate sets up on the base and the base plate is equipped with a plurality of LED light emitting sources, the lamp shade ora terminalis is connected with the base to make in the base plate quilt cover locates the lamp shade, wherein, the thickness at the different positions of lamp shade is inequality, and lamp shade top thickness is greater than lamp shade side thickness, and an utmost point origin of coordinate position in the space is located to the LED light emitting source, and when 0 degree orientation of directional the polar coordinates of orientation of the illumination of LED light emitting source, after the light of LED light emitting source passes through the lamp shade, the extremely the luminous flux of coordinate position 135 degree between to 180 degrees be at least a plurality of LED light emitting sources the total light flux 5%, and ...

Polyester resin and application thereof

The invention discloses a polyester resin and application thereof, and belongs to the chemistry field, and the polyester resin can be used for solving the problems of low hardness and poor water resistance of a general automobile surface varnish. The polyester resin disclosed by the invention is synthesised by an esterification method, and the resin is used as a component for the automobile surface varnish; the automobile surface varnish is high in hardness, good in water resistance, low in cost, and capable of being widely used in the market.

Drawer type trades coal stove

The utility model provides a drawer type trades coal stove, includes from last to the stove top that connects gradually down, furnace body and furnace base, central authorities install the wick of placing the honeycomb briquette at the furnace body, it has insulation material to pack between wick periphery and the furnace body, install in furnace base move about can shovel coal the ware with can about the drawer ash bucket that moves, on the ware of shoveling coal the plane open have big round hole and on big round hole the overlap joint have the many stove thin bamboo strips, the ware is shoveled coal by push rod connection drive in the ware below of shoveling coal to drawer ash bucket activity suit. The utility model discloses need not to press from both sides the honeycomb briquette when trading the coal, the cinder is direct to be clear away by the drawer ash bucket, has not both had the dust contamination environment, keeps indoor clean health, and the operation is light easy again ...

Critical nursing medicine feeder

The invention discloses a medicine feeder for critical nursing, and relates to the technical field of medical instruments. The feeding pipe is fixed on one side wall of the mounting seat, and the feeding pipe is communicated with the interior of the mounting seat; the adjusting mechanism is arranged in the fixing plate and is connected with the mounting seat; one end of the conveying pipe is connected with the lower side of the outer ring wall of the feeding pipe, and the other end of the conveying pipe is suspended below one side of the fixing plate; the mouth supporting plate is connected with the conveying pipe through a connecting mechanism; the piston plates are symmetrically arranged on the two sides in the feeding pipe left and right and located on the two sides of the inner side of the conveying pipe; the mixing mechanism is arranged in the mounting seat, and the mixing mechanism is connected with the two piston plates; the driving mechanism is arranged on one side of the interior ...

Wireless set composite and multi -functional LED lights utensil that changes straight drive circuit is handed over in sharing

The utility model discloses a wireless set composite and multi -functional LED lights utensil that changes straight drive circuit is handed over in the sharing. The wireless set composite includes an antenna, one hand over changes straight drive circuit, a LED circuit board and a router, and transmission signal by the antenna makes to hand over changes straight drive circuit with the ac inversion of the input direct current for output to offer and being parallelly connected LED circuit board and the router that sets up and driving it, by this the control of accessible radio communication hand over and change straight drive circuit and convert and supply power, but and a plurality of electron device of integration in order to save cost of installation and space. The utility model discloses further including a multipurpose light set, containing the antenna, LED drive circuit, an at least LED lights and the router that have a bluetooth module, it changes straight action to make LED drive circuit ...

Method and system for simulating class dictation based on network

The invention discloses a method and a system for simulating class dictation based on a network. The method comprises the following steps: communication connection is established between a terminal and a dictation server so that the terminal is capable of obtaining a class distribution control signal sent by the dictation server, going into a simulated class distributed by the dictation server and detecting whether the dictation server confirms the terminal as a dictation user, and if the dictation server confirms the terminal as the dictation user, a simulation blackboard input interface for the user to input is provided; otherwise, a common dictation interface which comprises a simulation blackboard viewing interface is provided. The user can simulate the process and feeling of dictation in an actual class by use of the terminal, and therefore, the sense of participation and the activity of the user can be improved.

Control method and device for I-type three-level circuit

Control method and device for I-type three-level circuit are disclosed, which can realize zero-voltage turn on of switching tube of high-frequency bridge arm, reduce circuit loss and improve circuit efficiency. The control method includes: detecting a current of an inductor connected with each of high-frequency arm bridges in operation state in the circuit; in a positive half cycle of AC connection terminal voltage of the circuit, when a freewheeling switching tube of the high-frequency arm bridge connected with the inductor is in ON state and a main switching tube is in OFF state, controlling the freewheeling switching tube to keep in ON state and the main switching tube to keep in OFF state if the current does not reach a preset negative current, and controlling the freewheeling switching tube to be turned off and the main switching tube to be turned on if the current reaches the preset negative current.

Multi-state switch and converter using the multi-state switch

The invention discloses a multi-state switch and a converter using the multi-state switch. The multi-state switch comprises a transformer and a switch group, wherein the transformer comprises at least three primary windings and at least three auxiliary windings; the like terminal of each auxiliary winding of the transformer is connected with the unlike terminal of the adjacent auxiliary winding; the like terminals of all the primary windings of the transformer are connected with one another; the switch group comprises a first bridge arm, a second bridge arm and a third bridge arm which are connected in parallel; a first switch tube and a fourth switch tube are connected to form the first bridge arm; a second switch tube and a fifth switch tube are connected to form the second bridge arm; a third switch tube and a sixth switch tube are connected to form the third bridge arm; the unlike terminal of the first primary winding of the transformer is connected between the first switch tube and ...

Method and system for electronic graffiti in tourist attractions

The invention provides a method and system for electronic graffiti in tourist attractions, and aims at solving the technical problem that graffiti in the tourist attractions damages the tourist attractions at present. The method comprises the steps that after a tourist logs into the system, a scenic spot where the tourist is located is positioned; a picture with the scenic spot capable of being selected is provided for the tourist to serve as the background of graffiti according to the position, obtained through positioning, of the tourist; the graffito information of the tourist on the background is acquired; the graffito information is uploaded to a cloud server. Compared with an existing tourist attraction graffito mode, the method has the advantages that the graffito demand of the tourist in the tourist attractions is met, the tourist attractions are prevented from being damaged, the environment is protected, and the operation and maintenance cost of the tourist attractions is greatly ...

Power factor correction circuit

The invention discloses a power factor correction circuit which comprises a first inductor, a second inductor, a first multimodal switch, a second multimodal switch and a first capacitor, wherein the first inductor is connected between the first end of an alternating current power supply and the first end of the first multimodal switch, the second end and the third end of the first multimodal switch is connected to two ends of the first capacitor in a spanned way, the second inductor is connected between the second end of the alternating current power supply and the first end of the second multimodal switch, and the second end and the third end of the second multimodal switch are connected to two ends of the first capacitor in a spanned way. In the invention, a boost PFC circuit provided with the multimodal switches can improve the efficiency and the power density simultaneously. The invention can also reduce ripple waves of the inductors and the capacitor, the switching loss and the on-state ...

Control Method and Device for I-Type Three-Level Circuit

Control method and device for I-type three-level circuit are disclosed, which can realize zero-voltage turn on of switching tube of high-frequency bridge arm, reduce circuit loss and improve circuit efficiency. The control method includes: detecting a current of an inductor connected with each of high-frequency arm bridges in operation state in the circuit; in a positive half cycle of AC connection terminal voltage of the circuit, when a freewheeling switching tube of the high-frequency arm bridge connected with the inductor is in ON state and a main switching tube is in OFF state, controlling the freewheeling switching tube to keep in ON state and the main switching tube to keep in OFF state if the current does not reach a preset negative current, and controlling the freewheeling switching tube to be turned off and the main switching tube to be turned on if the current reaches the preset negative current. 1. A control method for an I-type three-level circuit , characterized in comprising:detecting a current of an inductor connected with each of high-frequency arm bridges in an operation state in the I-type three-level circuit;in a positive half cycle of an alternating-current connection terminal voltage of the I-type three-level circuit, when a freewheeling switching tube of the high-frequency arm bridge connected with the inductor is in ON state and a main switching tube of the high-frequency arm bridge connected with the inductor is in OFF state, controlling the freewheeling switching tube in ON state to keep in ON state and the main switching tube in OFF state to keep in OFF state if it is detected that the current of the inductor does not reach a preset negative current, and controlling the freewheeling switching tube in ON state to be turned off and the main switching tube in OFF state to be turned on if it is detected that the current of the inductor reaches the preset negative current.2. The control method of claim 1 , characterized in that prior to ...

Interoperation judgment method and device, wireless charging system and electric vehicle

The invention discloses an interoperability judgment method and device, a wireless charging system and an electric vehicle. The method can judge whether interoperability can be achieved between a wireless transmitting device and a wireless receiving device or not. Wherein the wireless transmitting device can be a wireless charging station, and the wireless receiving device can be applied to new energy equipment such as an electric automobile and an electric unmanned aerial vehicle. The interoperation judgment result obtained by the method and the device can be further used for determining whether wireless charging is carried out or not. Therefore, the interoperation judgment method disclosed by the invention is beneficial to reducing many inconveniences brought to the user due to the fact that the wireless transmitting device and the wireless receiving device cannot perform interoperation.

Arc-extinguishing switch and switching method thereof

The invention discloses an arc-extinguishing switch which comprises a mechanical switch and a first electric branch, wherein the first electric branch is connected in parallel onto a first contact branch of the mechanical switch, the first electric branch comprises a first controllable unidirectional-conducting subbranch and a second controllable unidirectional-conducting subbranch, the first controllable unidirectional-conducting subbranch and the second controllable unidirectional-conducting subbranch are respectively controlled by two thyristors to be correspondingly conducted on alternating-current positive and negative semicircles, a first capacitor connected in series with the two thyristors is shared. The invention also discloses a switching method using the arc-extinguishing switch. In the invention, the high-power requirement of the arc-extinguishing switch on the thyristors and the cost of products are lowered, and the short circuit of the mechanical switch caused when a short-circuit ...

ARC EXTINGUISHING SWITCH AND SWITCHING METHOD THEREOF

The present invention discloses an arc extinguishing switch, including a mechanical switch and a first electric branch connected in parallel with a first contact branch of the mechanical switch, the first electric branch includes a first controllable unidirectional turn-on subbranch and a second controllable unidirectional turn-on subbranch, the first controllable unidirectional turn-on subbranch and the second controllable unidirectional turn-on subbranch are respectively controlled by two thyristors to be turned on in AC positive and negative periods correspondingly and share a first capacitor connected in series with the two thyristors. The invention further discloses a switching method using the arc extinguishing switch. In the invention, the high power requirement for the thyristor in the arc extinguishing switch and the product cost are lowered, and it is avoided that the mechanical switch is bypassed when the short-circuit failure occurs on the thyristor.

AC/DC convertor

The invention discloses an AC/DC convertor, which comprises a forestage PFC circuit and a post-stage DC/DC convertor, and is characterized in that: the PFC circuit is a natural-point-clamped PFC circuit; and the DC/DC convertor is an LLC convertor with synchronous rectification. The AC/DC convertor has the AC/DC function, realizes the input PFC function, and ensures that the input current follows input voltage and an output communication power supply loads the required 48V voltage, 12V voltage or voltage in other power grades. The voltage stress of a power switching tube of the natural-point-clamped circuit is half of that of a power switching tube of a common two-level PFC, so the model selection is easy; the voltage at two ends of an input filter inductor is multi-level, and zero crossing points of inductive current are multiple, so the size of the inductor can be reduced, and the power density of the power supply can be improved. The power switching tube of the DC/DC convertor works ...

Arc-extinguishing switch and switching method thereof

Four-planet-row stepless speed change mechanism with single-side graded transmission and speed change method thereof

The invention discloses a four-planet-row stepless speed change mechanism and a speed change method of the four-planet-row stepless speed change mechanism, and belongs to the technical field of stepless speed changels.The four-planet-row stepless speed change mechanism comprises a first planet row, a second planet row, a third planet row and a fourth planet row, a third sun gear on the third planet row is connected with a transmission stage, and the transmission stage comprises a transmission gear A and a transmission gear B; the transmission gear A and the transmission gear B are meshed through outer teeth, a first gear ring on the first planet row is connected with a second sun gear on the second planet row through a first connecting shaft, and a second gear ring on the second planet row is connected with a third planet carrier on the third planet row. A third planet carrier on the third planet row is connected with a fourth sun gear on the fourth planet row through a second connecting ...

Wireless charging receiving end, wireless charging transmitting end, wireless charging system and electric vehicle

The invention discloses a wireless charging receiving end, a wireless charging transmitting end, a wireless charging system and an electric vehicle, and relates to the technical field of wireless charging. The receiving end control circuit can obtain the load information and confirm whether the load power changes in a large range according to the load information, and when the load power changes in a large range, the receiving end control circuit changes the duty ratio of the rectifying circuit, so that the inverter current of the transmitting end changes rapidly. The transmitting end control circuit can obtain the current of the inverter circuit and turn off the output of the inverter current when the change of the inverter current reaches a threshold value. The output overvoltage and the rectification current peak value during large-range power switching of the load are well suppressed, wireless communication is not needed, the dynamic performance of the system can be optimized, and the ...

Resonant power converter and frequency tracking method for resonant power converter

A resonant power converter and a frequency tracking method for a resonant power converter are disclosed to determine a resonant status of the resonant power converter by sampling a secondary current, thereby controlling frequency of a drive signal. Therefore, the frequency of the drive signal tracks resonant frequency of the resonant power converter. The resonant power converter includes an inverter branch, which connected to the inverter branch, a transformer connected to the resonant branch, and a rectification and filtering branch connected to the transformer. A primary side of the transformer is connected to the resonant branch, and a secondary side of the transformer is connected to the rectification and filtering branch. A detection branch is connected to both the secondary side of the transformer and the rectification and filtering branch.

Teaching monitoring method, system and device of learning machine

The invention is applicable to the technical field of a learning machine, and particularly relates to a teaching monitoring method, system and device of a learning machine. The method comprises the following steps: a monitoring device monitors the learning machine in a specified period of time; when the monitoring device monitors that an application program of the learning machine running in the foreground currently does not belong to the specified application program, a lock command is transmitted to the learning machine; the learning machine locks the application program running in the foreground currently according to the lock command. According to the invention, the use frequency of the learning machine is improved, the high quality teaching resources in the learning machine are fully utilized, and the use of the learning machine is monitored in the specified period of time, so as to prevent the entertainment function in the learning machine from affecting learning of students.

Mobile communication device

The invention discloses a mobile communication device, which comprises a first appearance piece and an antenna. The upper surface of the first appearance piece is bent to form a first angle from a junction of a display area and a non-display area to a display direction, and the lower surface of the first appearance piece is bent to form a second angle from a bending point to the display direction, wherein the bending point of the lower surface of the first appearance piece corresponds to the display area of the upper surface; and the antenna is configured in the mobile communication device ina mode of corresponding to the non-display area of the first appearance piece and is used for receiving and transmitting signals processed by the mobile communication device.

Hybrid uninterruptible power supply system

Light emitting diode (LED) lamp

The utility model provides a light emitting diode (LED) lamp, it has a fluorescent tube and two end covers, the end cover is connected respectively and is located fluorescent tube no. 2 side and supply with a holding power supply or a power switching over spare, the end cover has a first thru hole respectively and hangs or install light emitting diode (LED) lamp with a montage connecting piece, it more has an at least backplate, the backplate is equipped with two at least first closure holes, respectively this end cover is to being equipped with an at least second closure hole in a little first closure holes, be connected backplate and end cover and make the backplate be located fluorescent tube one side in order to wear to establish first closure hole and second closure hole through at least two locking parts, make the inseparable and end cover rigid coupling of backplate by this, and can avoid the external force collision to cause the backplate to break away from the phenomenon, the end ...

RESONANT POWER CONVERTER AND FREQUENCY TRACKING METHOD FOR RESONANT POWER CONVERTER

A resonant power converter and a frequency tracking method for a resonant power converter are disclosed to determine a resonant status of the resonant power converter by sampling a secondary current, thereby controlling frequency of a drive signal. Therefore, the frequency of the drive signal tracks resonant frequency of the resonant power converter. The resonant power converter includes an inverter branch, which connected to the inverter branch, a transformer connected to the resonant branch, and a rectification and filtering branch connected to the transformer. A primary side of the transformer is connected to the resonant branch, and a secondary side of the transformer is connected to the rectification and filtering branch. A detection branch is connected to both the secondary side of the transformer and the rectification and filtering branch. 1. A resonant power converter , comprising:an inverter circuit,a resonant circuit connected to the inverter circuit,a transformer connected to the resonant circuit,a rectification and filtering circuit connected to the transformer,a detection circuit,a determining circuit, anda control circuit,wherein:a first side of the transformer is connected to the resonant circuit, a second side of the transformer is connected to the rectification and filtering circuit,the detection circuit is connected to both the second side of the transformer and the rectification and filtering circuit,the determining circuit is connected to the detection circuit, andthe control circuit is connected to both the determining circuit and the inverter circuit,the detection circuit is configured to: obtain a secondary current of the transformer, generate, according to the secondary current, a pulse signal corresponding to the secondary current, and send the pulse signal corresponding to the secondary current to the determining circuit,the control circuit is configured to generate a drive signal and send the drive signal to the inverter circuit and to the ...

APPARATUS AND METHOD FOR DETECTING METAL FOREIGN MATTER IN WIRELESS CHARGING SYSTEM, AND DEVICE

An apparatus and a method for detecting a metal foreign matter in a wireless charging system, and a device are provided. The apparatus includes a phase-lock control module, an excitation module, a resonance module, a signal collection module, and a determining module. The phase-lock control module is configured to: adjust a frequency of a first signal and output the first signal to the excitation module and the determining module. The excitation module is configured to: generate a second signal based on the first signal, and output the second signal to the resonance module. The resonance module is configured to output the third signal to the signal collection module under excitation of the second signal. The determining module is configured to determine whether there is a metal foreign matter in an area of the target coil.

Foreign matter detection device and method and wireless charger

The invention provides a foreign matter detection device and method and a wireless charger. In the foreign matter detection device, a signal generation module generates a first calibration excitation signal according to first indication information received from a processing module; according to the first indication information, at least two first calibration carrier signals with different initial phases are generated in a preset phase range at a preset phase step length; the phase difference detection module determines a first phase difference between each first calibration carrier signal and a first current signal according to each first calibration carrier signal and the first current signal obtained by the foreign matter detection module under the action of the first calibration excitation signal; the processing module determines a target initial phase according to a first phase difference between each first calibration carrier signal and the first current signal, and generates second ...

Arc extinguishing switch and switching method thereof

The present invention discloses an arc extinguishing switch, including a mechanical switch and a first electric branch connected in parallel with a first contact branch of the mechanical switch, the first electric branch includes a first controllable unidirectional turn-on subbranch and a second controllable unidirectional turn-on subbranch, the first controllable unidirectional turn-on subbranch and the second controllable unidirectional turn-on subbranch are respectively controlled by two thyristors to be turned on in AC positive and negative periods correspondingly and share a first capacitor connected in series with the two thyristors. The invention further discloses a switching method using the arc extinguishing switch. In the invention, the high power requirement for the thyristor in the arc extinguishing switch and the product cost are lowered, and it is avoided that the mechanical switch is bypassed when the short-circuit failure occurs on the thyristor.

Wireless Charging Control Method, and Wireless Charging Transmitter and System

A wireless charging control method for an electric vehicle or a wireless charging transmitter includes an inner-loop control circuit, a boost circuit, an inverter circuit, and a transmitting coil, where the inner-loop control circuit is coupled to both the boost circuit and the inverter circuit, and an input end and an output end of the inverter circuit are respectively coupled to the boost circuit and the transmitting coil, and the inner-loop control circuit is configured to obtain a first current reference signal and a sampled current signal of the transmitting coil, compare the first current reference signal with the sampled current signal to obtain an absolute value of a difference between the first current reference signal and the sampled current signal, and adjust a phase shift angle of the inverter circuit or a duty cycle of the boost circuit when the absolute value is greater than a preset deviation.

PHASE ALIGNMENT CIRCUIT AND METHOD OF RECEIVE END, AND RECEIVE END

This application discloses a phase alignment circuit and a method of a receive end, and a receive end. The receive end is located on an electric vehicle. The phase alignment circuit includes a phase measurement circuit and a controller. The controller is configured to: use, as an actual phase shift angle, a result obtained by subtracting a phase difference from a preset phase shift angle, and control a phase of a bridge arm voltage of a rectifier to lag behind the phase of the input current fundamental component by the actual phase shift angle. The controller outputs a drive signal for a controllable switching transistor of the rectifier by using the actual phase shift angle. Because a lagging phase caused due to filtering is compensated for, precision of synchronization between the bridge arm voltage and the input current can be increased. 1. A phase alignment circuit of a receive end , comprising:a phase measurement circuit having a first input end and a second input end, the first input end being connected to an output end of a current detection circuit, the second input end being connected to an output end of a filter, wherein the current detection circuit is to detect an input current of a rectifier and the filter is to filter the input current to obtain an input current fundamental component, and wherein the phase measurement circuit is further to obtain a phase difference between a phase of the input current and a phase of the input current fundamental component; and determine an actual phase shift angle by subtracting the phase difference from a preset phase shift angle, and', 'control a phase of a bridge arm voltage of the rectifier to lag behind the phase of the input current fundamental component by the actual phase shift angle., 'a controller configured to2. The phase alignment circuit according to claim 1 , wherein the phase measurement circuit is a digital phase detector claim 1 , and wherein the phase alignment circuit further comprises:a first zero- ...

Method and device for controlling Vienna-like three-level circuit

A method and a device for controlling a Vienna-like three-level circuit are provided. The method includes: detecting an inductor current of an inductor connected to each operating high-frequency bridge arm in the Vienna-like three-level circuit during a positive half cycle of an AC input voltage; and in a case that a freewheeling switch transistor on the high-frequency bridge arm to which the inductor is connected is in an on state, and a main switch transistor is in an off state, controlling the freewheeling switch transistor to maintain in the on state and the main switch transistor to maintain in the off state if the detected inductor current does not reach a preset negative current, and controlling the freewheeling switch transistor to be turned off and the main switch transistor to be turned on if the detected inductor current reaches the preset negative current.

Novel polyester and application thereof

The invention discloses novel polyester and an application thereof and belongs to the field of chemistry to solve the problems that a coating on the surface of a golf ball is poor in treatment adhesive force, poor in yellowing resistance, bad in scratch resistance and the like at present. The polyester disclosed by the invention is prepared from polyol and monocarboxylic acid with a carbon number of 9 by virtue of reaction. A coating prepared by using the polyester resin can greatly promote the yellowing resistance, impact resistance and scratch resistance of the surface of the golf ball when coated on the surface of the golf ball.

Brefeldin A glycosylated derivative and preparation and application thereof

The invention discloses a brefeldin A glycosylated derivative shown in a formula (I) and a preparation method and application thereof. The invention provides a novel brefeldin A glycosylated derivative; the water solubility of the brefeldin A glycosylated derivative is enhanced; the tumor inhibiting activity of the brefeldin A is retained; in-vitro detection shows that the effective inhibition rate to cancer cells such as a human esophagus cancer and the like can be up to 80%; the preparation method of the preferred brefeldin A glycosylated derivative is obtained by optimizing the conditions of a compound (II), (img file='DDA0000451154560000011.TIF' wi='776' he='307'/), in the formula (I), R is pentose, hexose, amino hexose or hexose acid.

Multi-steady state liquid crystal display and driving way thereof

The invention relates to a multi-steady state display and a method. The display comprises a first substrate, a second substrate, a first electrode, a second electrode and a liquid crystal layer, wherein the first substrate is parallel to the second substrate; the first electrode is arranged on the first substrate; the second electrode is arranged at the side of the second substrate, facing to the first substrate; and at least one of the first electrode and the section electrode comprises a grid electrode; and the liquid crystal layer contains smectic liquid crystal molecules. The invention adopts a special electrode design, effectively improves the display contrast ratio and also has the multi-steady state display effect.

Phase alignment circuit and method of receive end, and receive end

This application discloses a phase alignment circuit and a method of a receive end, and a receive end. The receive end is located on an electric vehicle. The phase alignment circuit includes a phase measurement circuit and a controller. The controller is configured to: use, as an actual phase shift angle, a result obtained by subtracting a phase difference from a preset phase shift angle, and control a phase of a bridge arm voltage of a rectifier to lag behind the phase of the input current fundamental component by the actual phase shift angle. The controller outputs a drive signal for a controllable switching transistor of the rectifier by using the actual phase shift angle. Because a lagging phase caused due to filtering is compensated for, precision of synchronization between the bridge arm voltage and the input current can be increased.

LED drive circuit

The invention relates to an LED drive circuit. The LED drive circuit comprises a protection unit, a rectifying and filtering unit, a control unit, an LED drive unit and a detected current feedback unit, wherein the protection unit is connected with an alternating current power supply, the rectifying and filtering unit is electrically connected with the protection unit, one end of the control unit is electrically connected with the rectifying and filtering unit, the LED drive unit is provided with a light emitting diode, a first capacitor and a transistor, the light emitting diode is in parallel connection with the first capacitor, the light emitting diode is provided with a positive electrode and a negative electrode, the positive electrode of the light emitting diode is electrically connected with the rectifying and filtering unit and the control unit, and the detected current feedback unit is arranged between the LED drive unit and the control unit. In this way, the detected current feedback ...

Five-level rectification convertor

The invention discloses a five-level rectification convertor comprising a filter circuit, a first midpoint clamping bridge arm, a second midpoint clamping bridge arm, a first capacitor and a second capacitor, wherein an alternating-current power supply which is filtered through the filter circuit is connected to the midpoints of the first midpoint clamping bridge arm and the second midpoint clamping bridge arm; the upper ends of the first midpoint clamping bridge arm and the second midpoint clamping bridge arm as well as the first end of the first capacitor are connected with a positive potential bus; the lower ends of the first midpoint clamping bridge arm and the second midpoint clamping bridge arm as well as the first end of the second capacitor are connected with a negative potential bus; and the second ends of the first capacitor and the second capacitance are connected with the midpoint of a direct-current bus. By means of the five-level rectification convertor, total harmonic distortion ...

AC/DC convertor

The invention discloses an AC/DC convertor, which comprises a forestage PFC circuit and a post-stage DC/DC convertor, and is characterized in that: the PFC circuit is a natural-point-clamped PFC circuit; and the DC/DC convertor is an LLC convertor with synchronous rectification. The AC/DC convertor has the AC/DC function, realizes the input PFC function, and ensures that the input current followsinput voltage and an output communication power supply loads the required 48V voltage, 12V voltage or voltage in other power grades. The voltage stress of a power switching tube of the natural-point-clamped circuit is half of that of a power switching tube of a common two-level PFC, so the model selection is easy; the voltage at two ends of an input filter inductor is multi-level, and zero crossing points of inductive current are multiple, so the size of the inductor can be reduced, and the power density of the power supply can be improved. The power switching tube of the DC/DC convertor works in ...

Voltage converter

The invention discloses a voltage converter, comprising two or three converter modules, an input end connection module and an output end connection module, wherein each converter module is provided with two input ends and two output ends; the input end connection module is provided with input ends and output ends which are conducted with each other; the number of the input ends is the same as the number of the converter modules, and the number of the output ends is twice the number of the converter modules; the output end connection module is provided with input ends and output ends which are conducted with each other; the number of the input ends is twice the number of the converter modules, and the number of the output ends is two; the output ends of the input end connection module are coupled with the input ends of each converter module; and the output ends of each converter module are coupled with the input ends of the output end connection module. By adding the input end and output ...

Application of STC2 as molecular marker and liver cancer early diagnosis kit

The invention discloses application of STC2 as a molecular marker and a liver cancer early diagnosis kit, and relates to in-vitro diagnosis molecular markers. The invention provides STC2 in serum as a primary liver cancer screening and prognosis biomarker and application thereof. The invention provides application of a reagent for detecting STC2 in serum in preparation of a diagnostic product. If the level of STC2 in the serum of the subject is higher than a threshold level, indicating that the subject suffers from the primary liver cancer; meanwhile, the HCC prognosis can also be judged by measuring the level of the STC2 in the serum of the subject, and if the level of the STC2 in the serum of the subject is higher than the threshold level, the HCC prognosis of the subject can be judged to be poor. As the level of the STC2 is also obviously increased in serum of a liver cancer patient with negative AFP, the STC2 has better diagnosis potential than a clinically classical liver cancer marker ...

ELECTRIC VEHICLE WIRELESS CHARGING METHOD, APPARATUS, AND SYSTEM

The present application relates to the field of automotive technologies, and provides an electric vehicle wireless charging method, an apparatus, and a system. A wireless charging station can charge an electric vehicle according to a charging request of the electric vehicle and charging permission of the electric vehicle prestored on the wireless charging station, so that resources of the wireless charging station are maximally used, and resource waste of the wireless charging station is avoided.

BRIDGELESS POWER FACTOR CORRECTION CIRCUIT

A bridgeless PFC circuit is provided. A low-frequency bridge leg includes a first diode and a second diode connected in series; a three-port network includes a switch tube and an inductor; a lightning and surge protection bridge leg includes a third diode and a fourth diode connected in series; a capacitor is connected between terminals of the low-frequency bridge leg, and between terminals of the lightning and surge protection bridge leg; a common terminal of the first and second diodes is connected to a terminal of an AC power, and a common terminal of the third and fourth diodes is connected to the other terminal; and the three-port network has two ports with the capacitor connected therebetween, and another port connected to the common terminal of the third and fourth diodes. Thus, EMI performance and efficiency can be improved and costs of the whole circuit can be lowered.

Arc extinguishing mixed transfer switch and switch transferring method

The invention discloses an arc extinguishing mixed transfer switch which comprises a mechanical switch and a first thyristor branch circuit, wherein the first thyristor branch circuit is connected in parallel with a first contact point branch circuit of the mechanical switch; and the first thyristor branch circuit comprises a first bidirectional thyristor unit and a first non-polarity capacitor connected in series. The invention also discloses a switch mixed transferring method for arc extinguishing of the mechanical switch. Because the first non-polarity capacitor is arranged, a low-powered thyristor can be selected, thereby greatly reducing the cost of the thyristor; and simultaneously, when the thyristor has a short circuit fault, the first non-polarity capacitor can substitute the thyristor to play the arc extinguishing affect, thereby greatly decreasing load current and reducing the influence of the thyristor fault on load.

Method and device for automatic in-line measurement of diameters

A method and equipment for automatic in-line measurement of diameter is disclosed. The laser passes through raster G and convergent lens L1 to form parallel row of diffraction light spots. The workpiece to be measured is positioned on image plane of lens L1 and oscillated transverse by a certain amplitude. After Fourier transform, the light spots and the workpiece image are projected to photoelectric diode array by convergent lens L2. The transverse oscillation state of workpiece is obtained according to the number of light spots shielded by workpiece, the gap distance between two light spots, and the result and analysis of computer continuously scanning said array. Its diameter is calculated out to the accuracy of 0.01 mm.

Three-state three-level PFC circuit and multi-state three-level PFC circuit

The invention relates to a three-state three-level PFC circuit, which comprises an inductor, a combined three-state switch, a first capacitor and a second capacitor. The inductor is connected between a first end of an AC power supply and a first end of the combined three-state switch; a second end of the combined three-state switch is connected at a first end of the first capacitor; a third end of the combined three-state switch is connected at a second end of the second capacitor; a fourth end of the combined three-state switch is grounded; and the first end of the first capacitor, a second end of the first capacitor, and the second end of the second capacitor output three-level voltage. The invention also provides a multi-state three-level PFC circuit correspondingly. Compared with the common circuit without a three-state switch or a multi-state switch, the PFC circuit provided by the invention can obviously reduce the dimensions of the inductor and the capacitors, improve the powerfactor ...

Multi-state switch and converter using the multi-state switch

The invention discloses a multi-state switch and a converter using the multi-state switch. The multi-state switch comprises a transformer and a switch group, wherein the transformer comprises at leastThe invention discloses a multi-state switch and a converter using the multi-state switch. The multi-state switch comprises a transformer and a switch group, wherein the transformer comprises at leastthree primary windings and at least three auxiliary windings; the like terminal of each auxiliary winding of the transformer is connected with the unlike terminal of the adjacent auxiliary winding; t three primary windings and at least three auxiliary windings; the like terminal of each auxiliary winding of the transformer is connected with the unlike terminal of the adjacent auxiliary winding; the like terminals of all the primary windings of the transformer are connected with one another; the switch group comprises a first bridge arm, a second bridge arm and a third bridge arm which are conhe ...

Oil -water separator

The utility model discloses an oil -water separator, which comprises a tank body, the drain is installed to the bottom of the jar body, and a sewage draining valve is installed on the sewage drainingoutlet, the delivery port is installed to the bottom of the jar body, install the outlet valve on the delivery port, the base is installed to the bottom of the jar body, the feed inlet is installed toone side of the jar body, install the feed valve on the feed inlet, install the inlet tube on the feed inlet, install the water intaking valve on the inlet tube, the oil -out is installed to one sideof the jar body, install the delivery valve on the oil -out, the barometer is installed at the top of the jar body, the gas outlet is installed to one side of barometer, install the air outlet valveon the gas outlet, prefilter is installed to the inner wall bottom of the jar body, coalescence filtering separator is installed to one side of prefilter, vortex breaker is installed to one side of coalescence ...

Power factor correction circuit

The invention discloses a power factor correction circuit which comprises a first inductor, a second inductor, a first multimodal switch, a second multimodal switch and a first capacitor, wherein the first inductor is connected between the first end of an alternating current power supply and the first end of the first multimodal switch, the second end and the third end of the first multimodal switch is connected to two ends of the first capacitor in a spanned way, the second inductor is connected between the second end of the alternating current power supply and the first end of the second multimodal switch, and the second end and the third end of the second multimodal switch are connected to two ends of the first capacitor in a spanned way. In the invention, a boost PFC circuit provided with the multimodal switches can improve the efficiency and the power density simultaneously. The invention can also reduce ripple waves of the inductors and the capacitor, the switching loss and the on-state ...

Intelligent login method and system for users

The invention is applicable to the field of man-machine interaction and provides an intelligent login method for users. The intelligent login method includes steps of acquiring and analyzing biological characteristics of the users and generating real-time characteristic information of the users; calling stored registered characteristic information of all users and matching the real-time characteristic information and the registered characteristic information of the users one by one. The invention further provides an intelligent login system for the users. The users are capable of logging in through the intelligent login system in an electronic device without inputting passwords, so that the users do not need to remember passwords, and operation and use of the users are facilitated. While automatic switching among different users during use of the electronic device is realized, and information encryption before login of the different users is facilitated.

Multi-steady state liquid crystal display and driving way thereof

The invention relates to a multi-steady state display and a method. The display comprises a first substrate, a second substrate, a first electrode, a second electrode and a liquid crystal layer, wherein the first substrate is parallel to the second substrate; the first electrode is arranged on the first substrate; the second electrode is arranged at the side of the second substrate, facing to thefirst substrate; and at least one of the first electrode and the section electrode comprises a grid electrode; and the liquid crystal layer contains smectic liquid crystal molecules. The invention adopts a special electrode design, effectively improves the display contrast ratio and also has the multi-steady state display effect.

Receive end and transmit end of wireless charging system, and wireless charging system

A receive end and a transmit end of a wireless charging system, and the wireless charging system, where the receive end includes a receive coil, a rectifier, and a receive end controller, where the receive coil receives an alternating magnetic field and outputs an alternating current, the rectifier is configured to rectify the alternating current from the receive coil into a direct current, the receive end controller is configured to adjust, based on a target impedance sent by a transmit end controller, a reflection impedance reflected from the receive end to a transmit end such that an inverter of the transmit end implements a zero voltage switching (ZVS), and a bridge arm voltage is a voltage between two bridge arm midpoints of a full bridge rectifier or a voltage between a single bridge arm midpoint of a half bridge rectifier and ground.

Method and Device for Controlling Vienna-Like Three-Level Circuit

A method and a device for controlling a Vienna-like three-level circuit are provided. The method includes: detecting an inductor current of an inductor connected to each operating high-frequency bridge arm in the Vienna-like three-level circuit during a positive half cycle of an AC input voltage; and in a case that a freewheeling switch transistor on the high-frequency bridge arm to which the inductor is connected is in an on state, and a main switch transistor is in an off state, controlling the freewheeling switch transistor to maintain in the on state and the main switch transistor to maintain in the off state if the detected inductor current does not reach a preset negative current, and controlling the freewheeling switch transistor to be turned off and the main switch transistor to be turned on if the detected inductor current reaches the preset negative current.

Quasi closed circulation cooling system

A quasi closed circulation cooling system comprises a metal cooling fin structure, a metal cooling guide pipe, a heat exchange pipeline, a pump and a water storage tank. The metal cooling guide pipe is arranged in the metal cooling fin structure in a penetrating and contact mode. The heat exchange pipeline is connected to one end of the metal cooling guide pipe in a communicated mode and abuts against a superheater. The pump is communicated to the heat exchange pipeline and used for conveying cooling liquid into the heat exchange pipeline. The water storage tank is communicated to the pump, and stores the cooling liquid so that the pump can convey the cooling liquid into the heat exchange pipeline, and the water storage tank is communicated to the other end, opposite to the heat exchange pipeline, of the metal cooling guide pipe so that the cooling liquid can flow back into the water storage tank from the metal cooling guide pipe.

LED bulb that seals is closed to solid state

The utility model provides a LED bulb that seals is closed to solid state, a base has, an at least LED lamp source and at least one power supply component, and have more a heat dissipation light conductor of the solid -state solid attitude appearance of promising light -permeable form, the confession is in order to hug closely cladding in LED lamp source and power supply component, one side of heat dissipation light conductor directly forms the LED ball with this base encapsulation and steeps the lamp, the heat energy accessible heat dissipation light conductor in LED lamp source is with contact conduction method effluvium to external, and the light in LED lamp source also accessible heat dissipation light conductor forms the light -emitting and satisfies the luminous intensity IB of luminous intensity IA that the heat dissipation light conductor appeared and LED lamp source production, its relational expression is IAIB>, 70% condition. Therefore, the utility model discloses can leave ...

LED (light emitting diode) control circuit

The invention relates to an LED (light emitting diode) control circuit, which comprises a protection unit, a rectifying filtering unit, a control unit, an LED driving unit, a detection current feedback unit and at least one relay, wherein the LED driving unit is provided with at least one first LED, at least one second LED and a transistor, the detection current feedback unit is arranged between the LED driving unit and the control unit, the relay is correspondingly connected with an alternating current power supply of the protection unit, the first LED, the second LED and the detection current feedback unit, when the alternating current power supply is changed, through starting the relay, the first LED and the second LED are converted from parallel connection into serial connection, the application to different input voltage can be realized, the goal of reducing the cost is reached, in addition, the electromagnetic interference is avoided, and a high-low-voltage compensation effect is ...

LIGHT BULB APPARATUS

A light bulb apparatus includes a bulb shell, an antenna, a driver, a light source plate and a bulb cap. The light source plate has a first layer and a second layer. The LED module is disposed on the first layer. The second layer includes a metal portion. The metal portion carries heat generated by the LED module for heat dissipation. The antenna is disposed upon the first layer. A bulb cap is connected to an external power. The driver is electrically connected to the antenna for receiving a wireless signal. The driver converts the external power to a driving current supplied to the LED module. 1. A light bulb apparatus , comprising:a bulb shell;an antenna;a driver;a light source plate with a first layer and a second layer, wherein a LED module is disposed on the first layer, wherein the second layer comprises a metal portion, wherein the metal portion carries heat generated by the LED module for heat dissipation, wherein the antenna is disposed upon the first layer; anda bulb cap connected to an external power, wherein the driver is electrically connected to the antenna for receiving a wireless signal, wherein the driver converts the external power to a driving current supplied to the LED module.2. The light bulb apparatus of claim 1 , wherein the antenna is a ceramic module embedding a metal antenna unit.3. The light bulb apparatus of claim 2 , wherein the ceramic module is a plate with a horizontal diameter of a bottom surface larger than a thickness of the ceramic module claim 2 , wherein the bottom surface engages the first layer of the light source plate.4. The light bulb apparatus of claim 3 , wherein an antenna conductive path is disposed to connect the antenna and the second layer of the light source plate to use the second layer together forming an antenna receiver.5. The light bulb apparatus of claim 4 , wherein the metal portion of the second layer has an antenna pattern corresponding to the wireless signal.6. The light bulb apparatus of claim 5 , ...

Lighting apparatus

A lighting apparatus includes multiple LED modules, a driver and a wireless circuit. The driver for converting an external power to a driving current. The light source plate includes a first metal layer, an insulation layer and a second metal layer. The second metal layer has a larger thickness than the first metal layer. The first metal layer has a first portion and a second portion. The first portion is used for electrically connecting the multiple LED modules. The second portion forms an antenna radiation part. The insulation layer is between the first metal layer and the second metal layer. The wireless circuit electrically connected to the second portion of the first metal layer. The antenna radiation part is used as an antenna for receiving a wireless signal.

Lighting apparatus

A lighting apparatus includes a wireless circuit board, a driver circuit board, a light source plate, a metal cover and a metal housing. The wireless circuit board is mounted with a wireless circuit. The wireless circuit has a first reference ground terminal. The driver circuit board is mounted with a driver circuit. The driver circuit has a second reference ground terminal. The light source plate is mounted with a LED module. The light source plate is placed on a top side of the metal cover. The first reference ground terminal and the second reference ground terminal are connected to the metal cover as a reference ground. The metal housing and a bottom side of the metal cover forms a container space for holding the driver circuit board and a first portion of the wireless circuit board.

Wireless Charging Receiving Apparatus, Method, Terminal, and System

A wireless charging receiving apparatus is provided, which includes a receiver coil, a rectifier, and a controller. The receiver coil is configured to receive electromagnetic energy and output an alternating current. The rectifier includes at least two controllable switches, and is configured to rectify the alternating current from the receiver coil to a direct current s. The controller is configured to perform phase-locking on a phase of a current fundamental component of the alternating current received by the rectifier, to obtain a periodic signal having a same frequency as the current fundamental component; and the controller is further configured to: generate a synchronization reference signal having the same frequency as the periodic signal, generate drive signals of the controllable switches in the rectifier based on the synchronization reference signal, and control, based on the drive signals, controllable switches in the rectifier to convert the alternating current into the direct current.

Foreign object detection method and apparatus, and wireless charging system

This application provides a foreign object detection method and apparatus, and a wireless charging system. The foreign object detection apparatus includes a coil array and a foreign object detection circuit. The coil array includes at least one coil group, and each coil group includes four detection coils whose locations are symmetrical to each other. The foreign object detection circuit determine an abnormal-value threshold of each coil group based on induction signals of each coil group and that are obtained in a first time period, and detect, based on the abnormal-value threshold and the induction signals of each coil group, whether there is a foreign object; when it is determined that there is no foreign object, detect, based on the signal threshold of each coil group and induction signals that are of each coil group and that are obtained in a second time period, whether there is a foreign object.

Resonant power converter and frequency tracking method therefor

Frequency locking method, wireless charging system, receiving device, and transmitting device

This application provides a frequency locking method, a wireless charging system, a receiving device, and a transmitting device for determining, through interaction between the receiving device and the transmitting device in a wireless charging scenario, whether a frequency locking procedure can be performed between the transmitting device and the receiving device. The receiving device includes: a controller, configured to control short-circuiting of an input terminal of a rectifier; a transceiver, configured to transmit a frequency locking request to the transmitting device, where the frequency locking request carries information about a first preset range, and the frequency locking request requests the transmitting device to generate an emission current whose frequency is within the first preset range; a receiving module, configured to obtain an input current of the rectifier based on the emission current; and a detector, configured to detect a frequency of the input current.

Light bulb apparatus

A light bulb apparatus includes a bulb shell, an antenna, a driver, a light source plate and a bulb cap. The light source plate has a first layer and a second layer. The LED module is disposed on the first layer. The second layer includes a metal portion. The metal portion carries heat generated by the LED module for heat dissipation. The antenna is disposed upon the first layer. A bulb cap is connected to an external power. The driver is electrically connected to the antenna for receiving a wireless signal. The driver converts the external power to a driving current supplied to the LED module.

Lighting apparatus

A lighting apparatus includes a wireless circuit board, a driver circuit board, a light source plate, a metal cover and a metal housing. The wireless circuit board is mounted with a wireless circuit. The wireless circuit has a first reference ground terminal. The driver circuit board is mounted with a driver circuit. The driver circuit has a second reference ground terminal. The light source plate is mounted with a LED module. The light source plate is placed on a top side of the metal cover. The first reference ground terminal and the second reference ground terminal are connected to the metal cover as a reference ground. The metal housing and a bottom side of the metal cover forms a container space for holding the driver circuit board and a first portion of the wireless circuit board.

Transmit end, receive end, method, and system for wireless charging

A transmit end, a receive end, a method, and a system for wireless charging are provided, and are applied to the field of electric vehicles. A transmit-end controller compares an actual output current of an inverter with a preset upper limit value of an output current of the inverter and controls an output voltage of the inverter based on a comparison result to adjust a current of a transmit coil. A receive-end controller receives a sampled value of the current of the transmit coil that is sent by the transmit-end controller and updates a reference value of the current of the transmit coil when a difference between the sampled value of the current of the transmit coil and the reference value of the current of the transmit coil is greater than or equal to a preset value.

Light apparatus

A light bulb apparatus includes a bulb shell, an antenna, a driver, a light source plate and a bulb cap. The light source plate has a first layer and a second layer. The LED module is disposed on the first layer. The second layer includes a metal portion. The metal portion carries heat generated by the LED module for heat dissipation. The antenna is disposed upon the first layer. A bulb cap is connected to an external power. The driver is electrically connected to the antenna for receiving a wireless signal. The driver converts the external power to a driving current supplied to the LED module.

Lighting apparatus

A lighting apparatus includes a LED module, a light source plate, a heat sink, an antenna, a driver and a light housing. The light source plate is used for holding the LED module. The heat sink has a bottom plate and a lateral wall. The light source plate is placed on the bottom plate. The antenna is disposed on the lateral wall. The driver is used for generating a driving current to the LED module. The driver has a wireless circuit. The wireless circuit is electrically connected to the antenna for transmitting a wireless signal. The light housing is used for holding the heat sink so that the LED module emits light toward a light opening of the light housing.

Apparatus and method for detecting metal foreign matter in wireless charging system, and device

An apparatus and a method for detecting a metal foreign matter in a wireless charging system, and a device are provided. The apparatus includes a phase-lock control module, an excitation module, a resonance module, a signal collection module, and a determining module. The phase-lock control module is configured to: adjust a frequency of a first signal and output the first signal to the excitation module and the determining module. The excitation module is configured to: generate a second signal based on the first signal, and output the second signal to the resonance module. The resonance module is configured to output the third signal to the signal collection module under excitation of the second signal. The determining module is configured to determine whether there is a metal foreign matter in an area of the target coil.

Wireless charging receiving end and transmitting end, system, control method and electric vehicle

This application discloses a wireless charging receiver, transmitter, system, and control method, and an electric vehicle, and relates to the field of wireless charging technologies. A low-frequency magnetic field receive coil of the receiver converts a low-frequency magnetic field into an induced signal. A receiver controller is configured to: when all low-frequency magnetic field transmit coils stop working, allocate a signal feature different from that of a current induced signal to each low-frequency magnetic field transmit coil, and send a correspondence between each low-frequency magnetic field transmit coil and the allocated signal feature to the wireless charging transmitter; and is further configured to determine, when the low-frequency magnetic field transmit coil works, relative positions of the power transmit coil and the power receive coil by using an induced signal having the allocated signal feature. A transmitter controller controls an inverter circuit based on the correspondence to enable each low-frequency magnetic field transmit coil to work. Mutual interference between low-frequency magnetic field signals of adjacent parking spaces can be avoided by using the foregoing receiver and transmitter.

Apparatus, device and method for detecting metal foreign matter in wireless charging system

Foreign object detection method and apparatus, and wireless charging system

This application provides a foreign object detection method and apparatus, and a wireless charging system. The foreign object detection apparatus includes a coil array and a foreign object detection circuit. The coil array includes at least one coil group, and each coil group includes four detection coils whose locations are symmetrical to each other. The foreign object detection circuit determine an abnormal-value threshold of each coil group based on induction signals of each coil group and that are obtained in a first time period, and detect, based on the abnormal-value threshold and the induction signals of each coil group, whether there is a foreign object; when it is determined that there is no foreign object, detect, based on the signal threshold of each coil group and induction signals that are of each coil group and that are obtained in a second time period, whether there is a foreign object.

Low frequency magnetic field-based positioning system and method, and devices

Low frequency magnetic field-based positioning system and method, and devices

This application provides a positioning system based on a low frequency magnetic field. The positioning system includes a low frequency magnetic field transmit apparatus and a low frequency magnetic field receive apparatus. The low frequency magnetic field transmit apparatus includes a low frequency magnetic field transmit coil, a conflict detect coil, and a magnetic field generation detection control module. The low frequency magnetic field receive apparatus includes a low frequency magnetic field receive coil and a magnetic field detection control module. The conflict detect coil is configured to sense a low frequency magnetic field signal. The magnetic field generation detection control module is configured to: when the conflict detect coil does not sense the low frequency magnetic field signal, control the low frequency magnetic field transmit coil to transmit a first low frequency magnetic field signal. The magnetic field detection control module is configured to: when it is determined that the low frequency magnetic field signal received by the low frequency magnetic field receive coil is the first low frequency magnetic field signal, determine relative positions of the low frequency magnetic field transmit coil and the low frequency magnetic field receive coil based on signal strength of the first low frequency magnetic field signal. According to this application, positioning accuracy of a low frequency magnetic field transmit coil and a low frequency magnetic field receive coil is improved, and applicability is high.

Lighting apparatus

A lighting apparatus includes a LED module, a light source plate, a heat sink, an antenna, a driver and a light housing. The light source plate is used for holding the LED module. The heat sink has a bottom plate and a lateral wall. The light source plate is placed on the bottom plate. The antenna is disposed on the lateral wall. The driver is used for generating a driving current to the LED module. The driver has a wireless circuit. The wireless circuit is electrically connected to the antenna for transmitting a wireless signal. The light housing is used for holding the heat sink so that the LED module emits light toward a light opening of the light housing.

Transmitting end and receiving end for wireless charging, and wireless charging system

This application discloses a wireless charging transmitter, a wireless charging receiver, and a wireless charging system. The transmitter includes: an output end of an inverter is connected to a transmitter compensation network; an output end of the transmitter LCC network is connected to a transmit coil; and a switch circuit is connected to the transmitter LCC network. The receiver includes a receiver LCC network. When a real part of a first output impedance of the inverter is greater than a real part of a second output impedance of the inverter, a transmitter controller controls the switch circuit to act, so that the wireless charging system works in a double-sided LCC network. When the real part of the first output impedance is less than or equal to the real part of the second output impedance, the transmitter controller controls the switch circuit to act, so that the wireless charging system works in a single-sided LCC network. The first output impedance is an output impedance of the inverter when the wireless charging system works in the double-sided LCC network, and the second output impedance is an output impedance of the inverter when the wireless charging system works in the single-sided LCC network. A wide coupling range is achieved, and charging efficiency is high for different vehicle types.

Lighting apparatus

Lighting apparatus

A lighting apparatus includes a LED module, a light source plate, a heat sink, an antenna, a driver and a light housing. The light source plate is used for holding the LED module. The heat sink has a bottom plate and a lateral wall. The light source plate is placed on the bottom plate. The antenna is disposed on the lateral wall. The driver is used for generating a driving current to the LED module. The driver has a wireless circuit. The wireless circuit is electrically connected to the antenna for transmitting a wireless signal. The light housing is used for holding the heat sink so that the LED module emits light toward a light opening of the light housing.

Wireless charging receiving end and transmitting end, system, control method and electric vehicle

Wireless charging receiving apparatus, method, terminal, and system

Phase calibration circuit and method for receiving end, and receiving end

This application discloses a phase alignment circuit and method of a receive end, and a receive end, where the phase alignment circuit and method of a receive end, and the receive end are applied to an electric vehicle. The receive end is located on the electric vehicle. The circuit includes: a phase measurement circuit and a controller. A first input end of the phase measurement circuit is connected to an output end of a current detection circuit, and a second input end of the phase measurement circuit is connected to an output end of a filter. The current detection circuit is configured to detect an input current of a rectifier. The filter is configured to filter the input current to obtain an input current fundamental component. The phase measurement circuit is configured to obtain a difference between a phase of the input current and a phase of the input current fundamental component. The controller is configured to: use, as an actual phase shift angle, a result obtained by subtracting the phase difference from a preset phase shift angle, and control a phase of a bridge arm voltage of the rectifier to lag behind the phase of the input current fundamental component by the actual phase shift angle. The controller outputs a drive signal for a controllable switching transistor of the rectifier by using the actual phase shift angle. Because a lagging phase caused due to filtering is compensated for, precision of synchronization between the bridge arm voltage and the input current can be increased.

Foreign object detection method and apparatus, and wireless charging system

This application provides a foreign object detection method and apparatus, and a wireless charging system. The foreign object detection apparatus includes a coil array and a foreign object detection circuit. The coil array includes at least one coil group, and each coil group includes four detection coils whose locations are symmetrical to each other. The foreign object detection circuit may obtain an induction signal generated by each detection coil; determine an abnormal-value threshold of each coil group based on induction signals that are of each coil group and that are obtained in a first time period, and detect, based on the abnormal-value threshold and the induction signals of each coil group, whether there is a foreign object; when it is determined that there is no foreign object, determine a signal threshold of each coil group based on the induction signals of each coil group; and detect, based on the signal threshold of each coil group and induction signals that are of each coil group and that are obtained in a second time period, whether there is a foreign object. The technical solutions provided in this application may improve wireless charging safety.

Wireless charging receiving apparatus, method, terminal, and system

This application provides a wireless charging receiving apparatus, a method, a terminal, and a system. The receiving apparatus includes a receiver coil, a rectifier, and a controller. The receiver coil is configured to receive electromagnetic energy transmitted by a transmitter coil and output an alternating current. The rectifier includes at least two controllable switches, and is configured to rectify the alternating current from the receiver coil to a direct current by using the at least two controllable switches. The controller is configured to perform phase-locking on a phase of a current fundamental component of the alternating current received by the rectifier, to obtain a periodic signal having a same frequency as the current fundamental component; and the controller is further configured to: generate a synchronization reference signal having the same frequency as the periodic signal, generate drive signals of the controllable switches in the rectifier based on the synchronization reference signal, and control, based on the drive signals, the controllable switches in the rectifier to convert the alternating current into the direct current, where the drive signals and the current fundamental component have the same frequency. After the phase-locking, a period of the synchronization reference signal does not change due to a sudden change of load, and frequencies of the drive signals do not jump, so that the entire wireless charging system works in a steady state.

Lighting apparatus

Wireless charging receiving apparatus, method, terminal, and system

A wireless charging receiving apparatus is provided, which includes a receiver coil, a rectifier, and a controller. The receiver coil is configured to receive electromagnetic energy and output an alternating current. The rectifier includes at least two controllable switches, and is configured to rectify the alternating current from the receiver coil to a direct current s. The controller is configured to perform phase-locking on a phase of a current fundamental component of the alternating current received by the rectifier, to obtain a periodic signal having a same frequency as the current fundamental component; and the controller is further configured to: generate a synchronization reference signal having the same frequency as the periodic signal, generate drive signals of the controllable switches in the rectifier based on the synchronization reference signal, and control, based on the drive signals, controllable switches in the rectifier to convert the alternating current into the direct current.

Wireless Charging Transmitter, Wireless Charging Receiver, and Wireless Charging System

In a wireless charging transmitter, an output end of an inverter is connected to a transmitter LCC network; an output end of the transmitter LCC network is connected to a transmit coil; and a switch circuit is connected to the transmitter LCC network. The receiver includes a receiver LCC network. When a real part of a first output impedance of the inverter is greater than a real part of a second output impedance of the inverter, a transmitter controller controls the switch circuit to act, so that the wireless charging system works in a double-sided LCC network. When the real part of the first output impedance is less than or equal to the real part of the second output impedance, the transmitter controller controls the switch circuit to act, so that the wireless charging system works in a single-sided LCC network.

Intelligent lamp

circuito e método de alinhamento de fase de terminal receptor, e terminal receptor

CIRCUITO E MÉTODO DE ALINHAMENTO DE FASE DE TERMINAL RECEPTOR, E TERMINAL RECEPTOR Este pedido de patente divulga um circuito e método de alinhamento de fase de um terminal receptor, e um terminal receptor. O terminal receptor está localizado no veículo elétrico. O circuito inclui: um circuito de medição de fase e um controlador. O controlador é configurado para: usar, como um ângulo de deslocamento de fase real, um resultado obtido pela subtração da diferença de fase de um ângulo de deslocamento de fase predefinido, e controlar uma fase de uma tensão de braço de ponte do retificador para se atrasar em relação à fase do componente fundamental da corrente de entrada pelo ângulo de deslocamento de fase real. O controlador envia um sinal de excitação para um transistor controlável de comutação do retificador mediante utilização do ângulo de deslocamento de fase real. Uma vez que uma fase em atraso provocada devido à filtragem é compensada, a precisão de sincronização entre a tensão de braço de ponte e a corrente de entrada pode ser aumentada.

Lighting apparatus

A lighting apparatus includes a wireless circuit board, a driver circuit board, a light source plate, a metal cover and a metal housing. The wireless circuit board is mounted with a wireless circuit. The wireless circuit has a first reference ground terminal. The driver circuit board is mounted with a driver circuit. The driver circuit has a second reference ground terminal. The light source plate is mounted with a LED module. The light source plate is placed on a top side of the metal cover. The first reference ground terminal and the second reference ground terminal are connected to the metal cover as a reference ground. The metal housing and a bottom side of the metal cover forms a container space for holding the driver circuit board and a first portion of the wireless circuit board.

Resonant power converter and frequency tracking method therefor

Lighting apparatus

A lighting apparatus includes a metal plate, an insulation layer, a light source, a driver circuit and a wireless circuit. The metal plate includes an antenna area and a base area. The antenna area and the base area are on a same plane. The insulation layer is placed on the metal plate. The insulation layer has a top side and a bottom side. The metal plate is disposed on the bottom side of the insulation layer. The light source includes a LED module. The light source is disposed on the top side of the insulation layer. The driver circuit is electrically connected to the light source via a first conductive path. The wireless circuit is electrically connected to the antenna area of the metal plate via a second conductive path.

Intelligent lamp including light source module and communications module

Transmitter End, Receiver End, Dynamic Wireless Power Supply System, and Electric Vehicle

A transmitter end includes a transmitter coil. The transmitter end further includes a transmitter end control system and N energy management modules, where N is an integer greater than 1. Input ends of the N energy management modules are electrically connected to a power grid, and output ends of the N energy management modules are electrically connected to the transmitter coil. Each energy management module includes an AC-DC circuit, an inverter circuit, and a transformer. The transmitter end control system is electrically connected to the inverter circuits in the N energy management modules, and is configured to output synchronous phase shift control signals with a fixed duty cycle, to drive the inverter circuits to work synchronously. The energy management module may be used in the transmitter end, and form a smallest module.

Transmit end, receive end, method, and system for wireless charging

A transmit end, a receive end, a method, and a system for wireless charging are provided, and are applied to the field of electric vehicles. A transmit-end controller compares an actual output current of an inverter with a preset upper limit value of an output current of the inverter and controls an output voltage of the inverter based on a comparison result to adjust a current of a transmit coil. A receive-end controller receives a sampled value of the current of the transmit coil that is sent by the transmit-end controller and updates a reference value of the current of the transmit coil when a difference between the sampled value of the current of the transmit coil and the reference value of the current of the transmit coil is greater than or equal to a preset value.

Lighting apparatus

A lighting apparatus includes multiple LED modules, a driver and a wireless circuit. The driver for converting an external power to a driving current. The light source plate includes a first metal layer, an insulation layer and a second metal layer. The second metal layer has a larger thickness than the first metal layer. The first metal layer has a first portion and a second portion. The first portion is used for electrically connecting the multiple LED modules. The second portion forms an antenna radiation part. The insulation layer is between the first metal layer and the second metal layer. The wireless circuit electrically connected to the second portion of the first metal layer. The antenna radiation part is used as an antenna for receiving a wireless signal.

Lighting apparatus

A lighting apparatus includes multiple LED modules, a driver and a wireless circuit. The driver for converting an external power to a driving current. The light source plate includes a first metal layer, an insulation layer and a second metal layer. The second metal layer has a larger thickness than the first metal layer. The first metal layer has a first portion and a second portion. The first portion is used for electrically connecting the multiple LED modules. The second portion forms an antenna radiation part. The insulation layer is between the first metal layer and the second metal layer. The wireless circuit electrically connected to the second portion of the first metal layer. The antenna radiation part is used as an antenna for receiving a wireless signal.

Lighting apparatus

A lighting apparatus includes a wireless circuit board, a driver circuit board, a light source plate, a metal cover and a metal housing. The wireless circuit board is mounted with a wireless circuit. The wireless circuit has a first reference ground terminal. The driver circuit board is mounted with a driver circuit. The driver circuit has a second reference ground terminal. The light source plate is mounted with a LED module. The light source plate is placed on a top side of the metal cover. The first reference ground terminal and the second reference ground terminal are connected to the metal cover as a reference ground. The metal housing and a bottom side of the metal cover forms a container space for holding the driver circuit board and a first portion of the wireless circuit board.

Positioning system and method based on low frequency magnetic field, and device

Example positioning system based on a low frequency magnetic field and apparatus are described. One example positioning system includes a low frequency magnetic field transmit apparatus and a low frequency magnetic field receive apparatus. The transmit apparatus includes a transmit coil, a conflict detect coil, and a magnetic field generation detection control module. The receive apparatus includes a receive coil and a magnetic field detection control module. When the conflict detect coil does not sense a low frequency magnetic field signal, the magnetic field generation detection control module controls the transmit coil to transmit a first low frequency magnetic field signal. When the received low frequency magnetic field signal is the first low frequency magnetic field signal, the magnetic field detection control module determines relative positions of the transmit coil and the receive coil based on signal strength of the first low frequency magnetic field signal.

Transmitting end, receiving end, dynamic wireless power supply system and electric vehicle

This application relates to a transmitter end, a receiver end, a dynamic wireless power supply system, and an electric vehicle, and relates to the field of wireless power supply technologies. In this technical solution, the transmitter end includes a transmitter coil. The transmitter end further includes a transmitter end control system and N energy management modules, where N is an integer greater than 1. Input ends of the N energy management modules are electrically connected to a power grid, and output ends of the N energy management modules are electrically connected to the transmitter coil. Each energy management module includes an AC-DC circuit, an inverter circuit, and a transformer. The transmitter end control system is electrically connected to the inverter circuits in the N energy management modules, and is configured to output synchronous phase shift control signals with a fixed duty cycle, to drive the inverter circuits to work synchronously. The energy management module may be used in the transmitter end, and form a smallest module. A quantity of energy management modules can be increased or decreased based on different power requirement levels, to quickly and flexibly increase a power capacity of a dynamic wireless power supply system and improve a system response speed.

Light apparatus

A light bulb apparatus includes a bulb shell, an antenna, a driver, a light source plate and a bulb cap. The light source plate has a first layer and a second layer. The LED module is disposed on the first layer. The second layer includes a metal portion. The metal portion carries heat generated by the LED module for heat dissipation. The antenna is disposed upon the first layer. A bulb cap is connected to an external power. The driver is electrically connected to the antenna for receiving a wireless signal. The driver converts the external power to a driving current supplied to the LED module.

Wireless charging control method, and wireless charging transmitter and system

A wireless charging control method for an electric vehicle or a wireless charging transmitter includes an inner-loop control circuit, a boost circuit, an inverter circuit, and a transmitting coil, where the inner-loop control circuit is coupled to both the boost circuit and the inverter circuit, and an input end and an output end of the inverter circuit are respectively coupled to the boost circuit and the transmitting coil, and the inner-loop control circuit is configured to obtain a first current reference signal and a sampled current signal of the transmitting coil, compare the first current reference signal with the sampled current signal to obtain an absolute value of a difference between the first current reference signal and the sampled current signal, and adjust a phase shift angle of the inverter circuit or a duty cycle of the boost circuit when the absolute value is greater than a preset deviation.

Transmitting end and receiving end for wireless charging, and wireless charging system