Motor control device, motor control method

CN115917955BActive Publication Date: 2026-06-23ASTEMO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ASTEMO LTD
Filing Date
2021-06-10
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

In the existing technology, the accuracy of the rotation angle calculation of a three-phase AC motor is affected by the deviation of the magnetic pole position sensor installation position and the detection error of the current sensor, resulting in problems such as reduced electricity costs and poor acceleration.

Method used

By using the measurement results of the magnetic pole position sensor in the motor control device, the rotation angle when the motor is in a three-phase short-circuit state at the peak current is compared with the reference rotation angle. The detected value of the rotation angle is corrected, and the corrected rotation angle is used for motor control.

Benefits of technology

It achieves high-precision determination of the rotation angle of a three-phase AC motor, suppresses the influence of magnetic pole position sensor installation position deviation and current sensor detection error, and improves the control accuracy and performance of the motor.

✦ Generated by Eureka AI based on patent content.

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Abstract

A motor control device of the present application controls a motor using a detected value of a rotation angle of the motor, based on a measurement result of a magnetic pole position of a magnetic pole position sensor, the motor being driven by a three-phase alternating current and being provided with the magnetic pole position sensor that measures the magnetic pole position of a rotor, in which the motor control device sets any one of the three-phase alternating current when the motor is in a three-phase short circuit as an object phase, compares a current peak time rotation angle that indicates the detected value of the rotation angle when a current value of the object phase is a peak value with a reference rotation angle that indicates the rotation angle when a prescribed current waveform of the object phase is a peak value, and corrects the detected value of the rotation angle based on a comparison result.
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Citation Information

Patent Citations

  • Motor controller

    JP2017212783A

  • Method and apparatus for estimating an angle offset of an angle sensor

    CN107276478A