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.

公开(公告)号：US20230097060A1

公开(公告)日：2023-03-30

申请号：US18074233

申请日：2022-12-02

Applicant: BYD COMPANY LIMITED

Inventor： Heping LING ,  Lei YAN ,  Yong XIONG ,  Chen HONG ,  Junwei ZHANG

IPC: H02P29/68 ,  H02P27/06

Abstract: An energy conversion device is provided, including: a first electrical motor control circuit, where the first electrical motor control circuit is connected with a battery pack; a second electrical motor control circuit, where the second electrical motor control circuit is connected with the first electrical motor control circuit in parallel; and a controller, configured to: when operating in a first control mode, control the first electrical motor control circuit to charge and discharge the battery pack to heat the battery pack, and control the second electrical motor control circuit to output torque.