公开(公告)号：US20240063747A1

公开(公告)日：2024-02-22

申请号：US18496625

申请日：2023-10-27

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Chunhong Lu ,  Jie Tang

IPC: H02P27/14 ,  B60L15/02 ,  B60L15/20

CPC classification number: H02P27/14 ,  B60L15/02 ,  B60L15/2045

Abstract: A motor driving apparatus, a motor system, and an electric vehicle are described that improve running efficiency of a motor and avoid damaging an inverter. The motor driving apparatus includes a three-level inverter, a motor parameter obtaining circuit, and a control circuit. The three-level inverter is configured to invert a direct current provided by the first power supply into an alternating current, and provide the alternating current for the motor; the motor parameter obtaining circuit is configured to be separately coupled to the motor and the control circuit, and is configured to: obtain a motor working condition signal of the motor, and provide the motor working condition signal for the control circuit; and the control circuit is configured to control the three-level inverter in the target working mode so that a midpoint voltage of the three-level inverter is less than a first voltage threshold.