Huawei Technologies Co., Limited

Vertiv Tech Co., Ltd.

Yunhe Mao

Zhixian Wu

Xiaosheng Zeng

Yanding Liu

Shuangquan Chen

Jian Li

Yang Bing

Qitang Liu

Weiliang Shu

Fubin Xu

Shuyang Wang

Wingto Fan

Furong Xiao

Hongcheng You

Junrui Xu

A resonant power supply, a primary-side feedback excitation power supply controller, a method, and a control apparatus are disclosed. In the resonant power supply, a bridge circuit is electrically connected to a power supply. The bridge circuit is configured to convert, based on a drive signal, a direct current provided by the power supply into a square wave signal. An LC series resonant network is electrically connected to the bridge circuit and a primary-side winding. The LC series resonant network is configured to convert the square wave signal into an alternating current, and output the alternating current to the primary-side winding. The alternating current includes an input voltage Vand an input current I.

Resonant power supply, primary-side feedback excitation power supply controller, method, and control apparatus

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

The technology of this disclosure relates to a wireless charging alignment method and apparatus, a wireless charging system, and an electric vehicle, and belongs to the field of wireless charging. In the wireless charging alignment apparatus, a first detection circuit may detect a first induction signal of a power receive coil in a positioning magnetic field generated by a power transmit coil; a second detection circuit may detect a second induction signal of a location detection coil in the positioning magnetic field; and a location determining circuit may determine a location of the power receive coil relative to the power transmit coil based on the first induction signal and the second induction signal.

Wireless charging alignment method and apparatus, wireless charging system, and electric vehicle

A wireless charging transmitting apparatus and method and a wireless charging system are provided. The transmitting apparatus includes a compensation circuit, an inverter circuit, a transmitting coil, an impedance adjustment circuit, and a controller. The impedance adjustment circuit includes a leading-bridge-arm impedance adjustment circuit and a lagging-bridge-arm impedance adjustment circuit, and the leading-bridge-arm impedance adjustment circuit and the lagging-bridge-arm impedance adjustment circuit each include an inductive branch, where the inductive branch includes at least one controllable inductive branch, and each controllable inductive branch includes at least one inductor and at least one switch. The controller controls the switches in the controllable inductive branches to be turned on or off, to adjust values of inductive currents injected into a leading bridge arm and a lagging bridge arm through the impedance adjustment circuit.

Wireless charging transmitting apparatus and method and wireless charging 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.

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

Example wireless charging systems and methods are disclosed. One example system includes a receive end and a transmit end. The receive end includes a receive coil, a receive end compensation circuit, a rectifier, and a controller. The controller adjusts a phase difference between a first bridge arm and a second bridge arm of the rectifier, and adjusts a phase-shift angle between a bridge arm voltage of the rectifier and a fundamental component of an input current of the rectifier, so that zero-voltage switching is implemented for controllable switching transistors of the rectifier. An inductance compensation module may weaken a capacitive part of the equivalent impedance, and reduce reactive power of the wireless charging system.

Receive end and transmit end of wireless charging system, method, electrical terminal, and 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

An inverter current equalization method includes separately comparing a reactive current of a first inverter and a reactive current of a second inverter with a reactive current reference value, to obtain a reactive current difference of the first inverter and a reactive current difference of the second inverter, separately comparing an active current of the first inverter and an active current of the second inverter with an active current reference value, to obtain an active current difference of the first inverter and an active current difference of the second inverter, and adjusting an input voltage amplitude of the first inverter and an input voltage amplitude of the second inverter based on the reactive current difference of the first inverter and the reactive current difference of the second inverter.

Inverter current equalization method and apparatus, inverter system, and wireless charging system

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

This application discloses wireless charging apparatuses, methods, and systems. One apparatus includes: a direct current to alternating current (DC-to-AC) inverter circuit configured to invert a DC output by a DC power supply to an AC; a compensation circuit configured to compensate the AC output by the DC-to-AC inverter circuit and send the AC obtained after the compensation to a transmitting coil; the transmitting coil configured to receive the AC and generate an AC magnetic field; an impedance adjustment circuit comprising one or more inductive branches; and a controller configured to control on or off of the switch in the inductive branch to change a current flowing out of the lagging bridge arm to enable a controllable switching transistor of the lagging bridge arm to implement zero-voltage switching.

Wireless charging transmitting apparatus, transmitting method, 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.

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.

An Uninterrupted Power Supply (UPS) power supply system is provided, which includes: a filter module connected to a mains supply and configured to filter an input from the mains supply; a BOOST module, where a first terminal of the BOOST module is connected to the filter module via a first switch group and connected to a battery via a second switch group, and a second terminal of the BOOST module is connected to a positive bus and a negative bus; and a bi-directional Direct Current/Direct Current (DC/DC) module, where a first terminal of the bi-directional DC/DC module is connected to the battery, and a second terminal of the bi-directional DC/DC module is connected to the positive bus and the negative bus.

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Shenzhen, China

Yunhe Mao