A motor detection method and device, electronic equipment and storage medium

By applying a voltage excitation signal at a specific electrical angle and combining it with signal processing technology, the parameters of the permanent magnet synchronous motor can be accurately calculated, solving the problem of insufficient detection accuracy in the existing technology and improving the stability and efficiency of motor control.

CN121283276BActive Publication Date: 2026-06-02CHAOQING MOTOR (SHENZHEN) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHAOQING MOTOR (SHENZHEN) CO LTD
Filing Date
2025-10-29
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing methods for detecting parameters of permanent magnet synchronous motors lack sufficient accuracy and robustness, making it difficult to support improvements in the stability, efficiency, and control accuracy of high-performance controllers.

Method used

By controlling the motor to apply a voltage excitation signal at a specific electrical angle, the current response signal is collected. Combined with fast Fourier transform and high-pass filtering, the phase resistance, d-axis and q-axis inductance are accurately calculated. The current-frequency ratio control is used to increase the speed, and the flux linkage coefficient is calculated by combining steady-state voltage and current.

Benefits of technology

It enables high-precision detection of motor parameters, improves controller performance, and ensures the stability and control accuracy of the motor in high-level applications.

✦ Generated by Eureka AI based on patent content.

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    Figure CN121283276B_ABST
Patent Text Reader

Abstract

The application provides a motor detection method and device, electronic equipment and storage medium, wherein the method comprises: controlling the motor to run under a first identification parameter, calculating the phase resistance value of the motor under the first identification parameter; controlling the motor to run under a second identification parameter, collecting the sinusoidal current response signal of the motor under the second identification parameter; based on the sinusoidal voltage excitation signal, the sinusoidal current response signal and the phase resistance value, calculating the d-axis inductance value and the q-axis inductance value; using the flow frequency ratio control mode to force the motor to drag, so that the rotating speed of the motor is increased to a target rotating speed; collecting the steady-state voltage and current value of the motor under the target rotating speed, and combining the d-axis inductance and the q-axis inductance, to calculate the flux linkage coefficient. Through the above method, the detection accuracy of the motor parameters can be improved.
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