Title:
CONTROL METHOD, APPARATUS AND SYSTEM FOR ELECTRIC MOTOR, AND ELECTRIC VEHICLE
Document Type and Number:
WIPO Patent Application WO/2023/023991
Kind Code:
A1
Abstract:
Provided are a control method, system and apparatus for an electric motor, and an electric vehicle. The method comprises: acquiring the input power and output power of an electric motor (201); performing calculation according to the input power and the output power, so as to obtain a loss power (202); determining a target d-axis current of the electric motor, wherein the target d-axis current is calculated by a calculation module according to the loss power, which calculation module comprises a tracking differentiator and operates in a controller (203); and determining a duty ratio according to the target d-axis current and a preset q-axis current, and inputting the duty ratio into an inverter, such that the inverter drives, according to the duty ratio, the electric motor to operate (204). By inputting a loss power of a permanent magnet synchronous motor into a tracking differentiator, the tracking differentiator can quickly obtain a target d-axis current, thereby greatly reducing the dependence on parameters of the permanent magnet synchronous motor, and the calculation amount thereof.
Inventors:
ZHENG XIONG (CN)
PAN XIANXI (CN)
DAN ZHIMIN (CN)
WANG HONG (CN)
PAN XIANXI (CN)
DAN ZHIMIN (CN)
WANG HONG (CN)
Application Number:
PCT/CN2021/114600
Publication Date:
March 02, 2023
Filing Date:
August 25, 2021
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H02P21/22; H02P27/04
Foreign References:
| CN108736782A | 2018-11-02 | |||
| CN1926757A | 2007-03-07 | |||
| CN112928969A | 2021-06-08 | |||
| JP2008236948A | 2008-10-02 | |||
| JP2000116198A | 2000-04-21 |
Attorney, Agent or Firm:
BEIJING WEIFEI LIANCHUANG INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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