公开(公告)号：US20230081974A1

公开(公告)日：2023-03-16

申请号：US17990649

申请日：2022-11-18

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

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

IPC: B60L53/38 ,  B60L53/36

Abstract: 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.

公开(公告)号：US12176831B2

公开(公告)日：2024-12-24

申请号：US18158038

申请日：2023-01-23

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Weiliang Shu ,  Wingto Fan ,  Shuangquan Chen

IPC: H02P21/14 ,  H02P9/14 ,  H02P25/03 ,  H02P29/024

Abstract: An input end of a first power conversion circuit of the system is connected to a power supply, and an output end of the first power conversion circuit is connected to a stator winding of an electrical excitation motor. An input end of a second power conversion circuit is connected to the power supply, and an output end of the second power conversion circuit is connected to a primary side of an excitation transformer. The excitation transformer transmits energy required by an excitation winding of the electrical excitation motor from a stator to a rotor. A first controller controls the first power conversion circuit to inject a current excitation into the stator winding, so that a current is generated on the excitation winding. A detection circuit obtains a response signal of the primary side of the excitation transformer and sends the response signal to a second controller.

公开(公告)号：US12088188B2

公开(公告)日：2024-09-10

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: H02M1/00 ,  B60L53/122 ,  H02J7/02 ,  H02J50/12 ,  H02J50/80 ,  H02M3/00 ,  H02M3/335

CPC classification number: H02M1/007 ,  B60L53/122 ,  H02J7/02 ,  H02J50/12 ,  H02J50/80 ,  H02M3/01 ,  H02M3/33573

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：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：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.