公开(公告)号：US20240178768A1

公开(公告)日：2024-05-30

申请号：US18550652

申请日：2023-04-12

Applicant: SOUTHEAST UNIVERSITY

Inventor： Wei WANG ,  Weijie TIAN ,  Ming CHENG

IPC: H02P5/48 ,  H02P21/14 ,  H02P21/22 ,  H02P27/06

CPC classification number: H02P5/48 ,  H02P21/141 ,  H02P21/22 ,  H02P27/06

Abstract: A control method for a semi-centralized open winding multi-motor drive system includes: first, measuring current, voltage and position signal, computing system thrust by a velocity loop; then, distributing the thrust to each motor, converting the thrust into q axis current, computing dq axis voltages required for each motor by a current loop, and transforming the voltage demand to abc coordinate system through coordinate transformation; subsequently, modulating the voltage of each motor into a duty ratio instruction to judge whether the motor is in an over-modulated operating area, and performing over-modulation processing on the voltage in the over-modulated area; and finally, distributing the duty ratio instructions to independent and shared inverters. The control method of the present disclosure can reduce the hardware cost and improve the safety and reliability of the system.