公开(公告)号：US12049144B2

公开(公告)日：2024-07-30

申请号：US17840963

申请日：2022-06-15

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Shuangquan Chen ,  Zhixian Wu ,  Yunhe Mao ,  Xiaosheng Zeng ,  Hongcheng You

IPC: B60L53/122 ,  B60L53/62 ,  H02J50/12

CPC classification number: B60L53/122 ,  B60L53/62 ,  H02J50/12

Abstract: 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.

公开(公告)号：US11901760B2

公开(公告)日：2024-02-13

申请号：US17226860

申请日：2021-04-09

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yunhe Mao ,  Yanding Liu

IPC: H02J7/02 ,  H02J50/12 ,  H02M1/00 ,  H02M7/219

CPC classification number: H02J7/02 ,  H02J50/12 ,  H02M1/0058 ,  H02M7/219

Abstract: 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.

公开(公告)号：US11482941B2

公开(公告)日：2022-10-25

申请号：US17345189

申请日：2021-06-11

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yunhe Mao ,  Zhixian Wu ,  Xiaosheng Zeng

IPC: H02M3/335 ,  H02J50/12 ,  B60L53/122 ,  H02M1/08 ,  H02J50/10 ,  H02M1/00

Abstract: 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.

公开(公告)号：US11190042B2

公开(公告)日：2021-11-30

申请号：US17157697

申请日：2021-01-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yunhe Mao ,  Yanding Liu

IPC: H02J7/06 ,  H02J50/10 ,  H02M7/5387 ,  B60L53/122

Abstract: 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.

公开(公告)号：US11177696B2

公开(公告)日：2021-11-16

申请号：US17136894

申请日：2020-12-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yunhe Mao ,  Zhixian Wu ,  Xiaosheng Zeng

IPC: H02J50/12 ,  H02J50/80 ,  H02J50/10

Abstract: 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.

公开(公告)号：US20210135498A1

公开(公告)日：2021-05-06

申请号：US17144764

申请日：2021-01-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhixian Wu ,  Yunhe Mao ,  Xiaosheng Zeng ,  Shuangquan Chen

IPC: H02J50/12 ,  H02J7/02 ,  H02J50/80 ,  B60L53/122

Abstract: 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.

公开(公告)号：US20200259356A1

公开(公告)日：2020-08-13

申请号：US16856435

申请日：2020-04-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yunhe Mao

IPC: H02J7/02 ,  H02J50/10 ,  H02J50/20 ,  H02M7/537 ,  H02M7/493

Abstract: 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.