公开(公告)号：US20220077709A1

公开(公告)日：2022-03-10

申请号：US17416745

申请日：2019-12-17

Applicant: BYD COMPANY LIMITED

Inventor： Changjiu LIU ,  Hua PAN ,  Ronghua NING ,  Yang LIU ,  Ning YANG

IPC: H02J7/00 ,  H02J7/04 ,  H02P27/08

Abstract: The present disclosure provides a power battery charging method, a motor control circuit, and a vehicle. The motor control circuit includes a first switch module, a three-phase inverter, and a control module, where a power supply module, the first switch module, the three-phase inverter, and a three-phase alternating current motor form a current loop, the three-phase alternating current motor inputs or outputs a current by using a wire N extending from a connection point of three phase coils, and the control module controls the three-phase inverter, so that the motor control circuit receives a voltage of the power supply module and outputs a direct current. In the technical solutions, a wire N extends from the three-phase alternating current motor, and further forms different charging loops with the three-phase inverter, the three-phase alternating current motor, and the power battery. When it is detected that the voltage of the power supply module is not higher than a voltage of the power battery, the original three-phase inverter and three-phase alternating current motor are adopted to boost the voltage of the power supply module before the power battery is charged, and in this way, no extra external boost circuit needs to be added, which reduces costs of the additional circuit.

公开(公告)号：US20240072562A1

公开(公告)日：2024-02-29

申请号：US18505826

申请日：2023-11-09

Applicant: BYD COMPANY LIMITED

Inventor： Changjiu LIU ,  Hua PAN ,  Ronghua NING ,  Yang LIU ,  Ning YANG

IPC: H02J7/00 ,  H02J7/04 ,  H02P27/08

CPC classification number: H02J7/007182 ,  H02J7/04 ,  H02P27/08 ,  B60L50/51

Abstract: A motor control circuit includes a first switch module, a three-phase inverter, and a control module. A power supply module, the first switch module, the three-phase inverter, and a three-phase alternating current motor form a current loop; midpoints of three phase legs of the three-phase inverter are respectively connected to three phase coils of the three-phase alternating current motor; the three-phase alternating current motor is configured to input or output a current by using a wire N extending from a connection point of the three phase coils; the control module is connected to the three-phase inverter, first switch module, three-phase alternating current motor, and power supply module; the control module is configured to control the three-phase inverter to enable the motor control circuit to receive a voltage of the power supply module and output a direct current, and to boost a voltage of the power supply module.