Huawei Technologies Co., Limited

Huawei Digital Power Technologies Co., Ltd.

Vertiv Tech Co., Ltd.

Asco Power Technologies, L.p.

Zhixian Wu

Yunhe Mao

Xiaosheng Zeng

Yanding Liu

Shuyang Wang

Jian Li

Shuangquan Chen

Yingtao Li

Pinghua Wang

Ce Liu

Kai Song

Chunbo Zhu

Furong Xiao

Frank Heerdt

Chunsen Tang

Hongcheng You

Zhenzhen Wang

Wei Kuang

Jiakai Cao

Yaoyi Wang

Zhihui Wang

Xingjian Zhou

Lianbin Cheng

Jinhai Jiang

Pengfei Bai

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.

Dynamic wireless power supply system with controllable power capacity using energy management circuits

A wireless charging receive end, system, and control method related to the field of wireless charging technologies are provided. The wireless charging receive end includes a receiver coil, a compensation network, a power converter, and a receive end controller. The receiver coil converts an alternating magnetic field transmitted by a transmit end into an alternating current and transmits the alternating current to the compensation network. The compensation network compensates for the alternating current and then transmit a compensated alternating current to the power converter. The power converter rectifies the compensated alternating current into a direct current for charging a load. The receive end controller obtains a reference signal based on an input current of the power converter and an input reference current, and sends the reference signal to a transmit end controller.

Wireless charging receive end with current control mechanisms

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.

Wireless charging transmitter, wireless charging receiver, and wireless charging system

A foreign object detection apparatus and method, and a wireless charger. In the foreign object detection apparatus, a signal generation module generates a first calibration excitation signal based on first indication information received from a processing module and generates at least two first calibration carrier signals based on the first indication information. A phase difference detection module determines, based on each first calibration carrier signal and a first current signal obtained by a foreign object detection module under an action of the first calibration excitation signal, a first phase difference between each first calibration carrier signal and the first current signal. The processing module determines a target initial phase based on the first phase difference, and then generates second indication information. The second indication information indicates the signal generation module to generate a detection carrier signal whose initial phase is the target initial phase.

Foreign object detection apparatus and method and wireless charger

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.

Wireless charging control method, and wireless charging transmitter and system

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.

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

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 receiving apparatus, method, terminal, and 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.

Foreign object detection method and apparatus, and wireless charging system

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.

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

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. The receive end is located on the electric vehicle. The 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 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.

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

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.

Electric vehicle wireless charging method, apparatus, and 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.

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

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.

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.

Resonant power converter and frequency tracking method for resonant power converter

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.

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Shenzhen, China

Zhixian Wu