公开(公告)号：US20240097599A1

公开(公告)日：2024-03-21

申请号：US18524070

申请日：2023-11-30

Applicant: BYD COMPANY LIMITED

Inventor： Chunsheng WANG ,  Boliang XU ,  Wei XIONG ,  Tao QIN ,  An CAO

IPC: H02P29/032

CPC classification number: H02P29/032

Abstract: A method for protecting a motor from overloading includes: acquiring a present effective value of a phase current of a motor; performing time integration on the present effective value of the phase current, to obtain a first integral value; obtaining a first threshold; performing overload detection according to the first threshold and the first integral value; determining a target limiting current for operation of the motor if an overload occurs; and controlling the operation of the motor based on the target limiting current.

公开(公告)号：US20240356473A1

公开(公告)日：2024-10-24

申请号：US18758734

申请日：2024-06-28

Applicant: BYD COMPANY LIMITED

Inventor： Tao QIN ,  Chunsheng WANG ,  Boliang XU ,  Wei XIONG ,  An CAO

IPC: H02P23/14 ,  B60L15/20

CPC classification number: H02P23/14 ,  B60L15/20 ,  B60L2240/423

Abstract: A vehicle includes a motor and a motor controller. A damping control method for the vehicle includes: obtaining a rotation speed of the motor; filtering the rotation speed through a first low-pass filter to obtain a first filtered rotation speed, filtering the rotation speed through a second low-pass filter to obtain a second filtered rotation speed, and obtaining, by a vehicle controller, a rotation speed fluctuation value based on the first filtered rotation speed and the second filtered rotation speed; obtaining, by the vehicle controller, an active damping adjustment coefficient and an active damping clipped torque based on the rotation speed; obtaining, by the vehicle controller, an active damping torque based on the rotation speed fluctuation value, the active damping adjustment coefficient, and the active damping clipped torque; and controlling, by the motor controller, the motor based on the active damping torque.