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Title:
ELECTRIC MOTOR CONTROL METHOD, ELECTRIC MOTOR AND MOVABLE PLATFORM
Document Type and Number:
WIPO Patent Application WO/2021/062725
Kind Code:
A1
Abstract:
An electric motor control method, apparatus and device. The method comprises: starting from a preset target position, using a first vector voltage to control a rotor of an electric motor to rotate in a first direction, and when it is detected that a code wheel arranged on the rotor generates an nth signal edge, recording the current first electrical angle value of the first vector voltage; after the first electrical angle value is recorded, using a second vector voltage to control the rotor of the electric motor to rotate in a second direction, and when it is detected that the code wheel generates the nth signal edge, recording the current second electrical angle value of the second vector voltage; acquiring an electrical angle offset value of the rotor according to the first electrical angle value and the second electrical angle value; and counting and acquiring the current electrical angle value of the rotor according to the electrical angle offset value and the current signal edge of the code wheel, and controlling the electric motor on the basis of the electrical angle value of the rotor, thereby starting an electric motor without absolute position information by means of a vector method.

Inventors:
CHEN, Xu (Yuexing 1st Rd. Hi-Tech Park Nanshan Distric, Shenzhen Guangdong 7, CN)
Application Number:
CN2019/109635
Publication Date:
April 08, 2021
Filing Date:
September 30, 2019
Export Citation:
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Assignee:
SZ DJI TECHNOLOGY CO., LTD. (Yuexing 1st Rd. Hi-Tech Park Nanshan Distric, Shenzhen Guangdong 7, CN)
International Classes:
H02P21/18
Attorney, Agent or Firm:
TEKYRS INTELLECTUAL PROPERTY INC. (13th FloorZhongkun Mansion, No. 59, No.1building,,Gaoliangqiao Byway, Haidian District, Beijing 4, CN)
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