公开(公告)号：US20230067971A1

公开(公告)日：2023-03-02

申请号：US17858864

申请日：2022-07-06

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xiong ZHENG ,  Xianxi PAN ,  Yu LUO ,  Zhimin DAN

IPC: H02P21/05 ,  H02P21/22 ,  H02P6/10

Abstract: This application provides a permanent-magnet synchronous machine control method and device, and a permanent-magnet synchronous machine control system. The method includes: obtaining a d-axis current id and a q-axis current iq in a permanent-magnet synchronous machine control loop at a current moment; obtaining a fifth-order harmonic current id5th and a seventh-order harmonic current id7th in the d-axis current id in the permanent-magnet synchronous machine control loop at the current moment, and a fifth-order harmonic current iq5th and a seventh-order harmonic current iq7th in the q-axis current iq in the permanent-magnet synchronous machine loop at the current moment; determining a d-axis current idk+1 at a next moment in each switch state; determining a q-axis current iqk+1 at the next moment in each switch state based on the first current idk, the second current iqk, and the second voltage in each switch state; and determining a control policy of the permanent-magnet synchronous machine.

公开(公告)号：US20230060510A1

公开(公告)日：2023-03-02

申请号：US17858832

申请日：2022-07-06

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiong ZHENG ,  Xianxi PAN ,  Yu LUO ,  Zhimin DAN

IPC: G01R35/00 ,  G01R31/34

Abstract: This application provides a method and device for updating calibration data of an electric motor, an electronic device, and a storage medium. The method includes: obtaining an initial calibration datum of the electric motor; determining whether a deviation between the initial calibration datum and a theoretical calculation datum exceeds a first threshold; recalibrating the electric motor based on the preset calibration parameter when the deviation between the initial calibration datum and the theoretical calculation datum exceeds the first threshold, and obtaining an updated calibration datum; determining whether a deviation between the updated calibration datum and the initial calibration datum exceeds a second threshold; and updating the initial calibration datum based on the updated calibration datum when the deviation between the updated calibration datum and the initial calibration datum does not exceed the second threshold, thereby updating and rectifying the initial calibration datum.