Title:
POSITION SENSOR CALIBRATION METHOD AND APPARATUS APPLIED TO ELECTRIC MOTOR
Document Type and Number:
WIPO Patent Application WO/2023/245769
Kind Code:
A1
Abstract:
The present invention relates to the technical field of position calibration, and in particular to a position sensor calibration method and apparatus applied to an electric motor. The method comprises: acquiring absolute position information of an electric motor by means of the feedback of a PWM signal; giving a quadrature signal of the electric motor; giving an electrical angle of the electric motor in a first direction, and recording a first relative angle fed back by the quadrature signal; according to a mapping relationship between the first relative angle and the electrical angle, acquiring a first calibration mapping table in which the first relative angle is mapped to the electrical angle; and setting the first calibration mapping table to be a mapping table after a position sensor is calibrated, so as to perform calibration. The present invention solves the problems such as existing sensor position calibration being easily interfered and position information being inaccurate; and a relative angle with good real-time performance is calibrated by using an absolute lag angle fed back by PWM information, so as to avoid the situation of step loss.
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Inventors:
YU YANAN (CN)
LIAO XUANHONG (CN)
LU ZHENFENG (CN)
SHENG LIGUO (CN)
LIAO XUANHONG (CN)
LU ZHENFENG (CN)
SHENG LIGUO (CN)
Application Number:
PCT/CN2022/105532
Publication Date:
December 28, 2023
Filing Date:
July 13, 2022
Export Citation:
Assignee:
DONGGUAN DIRECT DRIVE TECH LIMITED (CN)
International Classes:
H02P23/14
Foreign References:
| CN109039198A | 2018-12-18 | |||
| CN112304210A | 2021-02-02 | |||
| CN109655083A | 2019-04-19 | |||
| CN107076020A | 2017-08-18 | |||
| CN107919830A | 2018-04-17 | |||
| US20190131898A1 | 2019-05-02 |
Attorney, Agent or Firm:
DONGGUAN HENGCHENG IP AGENCY CO., LTD. (CN)
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