Title:
CONTROL METHOD OF ELECTRIC DRIVE SYSTEM OF VEHICLE, ELECTRIC DRIVE SYSTEM, AND VEHICLE
Document Type and Number:
WIPO Patent Application WO/2022/205836
Kind Code:
A1
Abstract:
A control method of an electric drive system of a vehicle, comprising: obtaining a present heating power of an electric drive system according to a present operating point of a vehicle; determining a current adjustment amplitude according to the heating power required by the vehicle and the present heating power; obtaining, according to a three-phase current value and position value of a motor, a present direct-axis current value and a present quadrature-axis current value of the motor at the present operating point of the vehicle; and controlling the present direct-axis current value to oscillate according to a preset change frequency and the current adjustment amplitude to obtain a target direct-axis current value, such that the electric drive system can generate heat, and the oscillation of the current flowing through a power battery itself can increase the self-heating rate of the power battery, enabling the electric drive system of the vehicle to be applicable in cold regions. Also disclosed are an electric drive system and a vehicle.
Inventors:
LING HEPING (CN)
PAN HUA (CN)
ZHANG YUXIN (CN)
QIU GUOWEI (CN)
HONG CHEN (CN)
PAN HUA (CN)
ZHANG YUXIN (CN)
QIU GUOWEI (CN)
HONG CHEN (CN)
Application Number:
PCT/CN2021/124702
Publication Date:
October 06, 2022
Filing Date:
October 19, 2021
Export Citation:
Assignee:
BYD CO LTD (CN)
International Classes:
B60L15/20
Foreign References:
| CN113022326A | 2021-06-25 | |||
| CN111347938A | 2020-06-30 | |||
| CN111347935A | 2020-06-30 | |||
| CN110126678A | 2019-08-16 | |||
| CN113022262A | 2021-06-25 | |||
| EP2665179A1 | 2013-11-20 |
Attorney, Agent or Firm:
ZHIFAN & PARTNERS (CN)
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