公开(公告)号：US20230344375A1

公开(公告)日：2023-10-26

申请号：US18215725

申请日：2023-06-28

Applicant: BYD COMPANY LIMITED

Inventor： Heping LING ,  Hua PAN ,  Yuxin ZHANG ,  Guowei QIU ,  Chen HONG

IPC: H02P21/22 ,  H02P21/14 ,  H02P29/62 ,  B60H1/14

CPC classification number: H02P21/22 ,  H02P21/14 ,  H02P29/62 ,  B60H1/143 ,  B60L2240/423 ,  B60L2240/425 ,  B60L2240/429 ,  B60L2240/427 ,  B60L15/20

Abstract: A control method for an electric drive system of a vehicle, includes: acquiring a shaft torque of the electric motor and a present operating point of the vehicle in response to a vehicle heating demand signal; acquiring a present heat generation power of the electric drive system accordingly; determining a current adjustment amplitude accordingly; acquiring a three-phase current value and a position value of the electric motor, and a present direct axis current value and a present quadrature axis current value of the electric motor at the present operating point accordingly; controlling the present direct axis current value to oscillate at a change frequency and the current adjustment amplitude to obtain a target direct axis current value; acquiring a target quadrature axis current value accordingly; acquiring an electric motor drive signal accordingly.