Motor control method, device, controller, motor, medium and program product

CN122292985APending Publication Date: 2026-06-26XIAOMI TECH (WUHAN) CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIAOMI TECH (WUHAN) CO LTD
Filing Date
2026-03-30
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

In sensorless control technology, the accuracy of rotor position estimation is easily affected by fluctuations in motor parameters and external disturbances. Especially in scenarios with severe disturbances, it is difficult to meet the requirements of high-precision control, and the sensors are prone to failure, which affects the stability of the system.

Method used

By employing a sliding mode observer combined with a continuous nonlinear function and a phase-locked loop module, the position and angular velocity of the motor rotor are determined by acquiring the current and voltage components of the motor. The sliding mode switching function is used to suppress high-frequency chattering and improve estimation accuracy.

Benefits of technology

In the absence of position sensors, the accuracy of motor rotor position and rotational angular velocity is improved, sliding mode chatter is reduced, and the precision and stability of motor control are enhanced.

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Abstract

This disclosure relates to a motor control method, apparatus, controller, motor, medium, and program product. The method includes: acquiring the current and voltage components of the motor; inputting the current and voltage components into a sliding mode observer to obtain the observed value of the motor's current back electromotive force (EMF) output by the sliding mode observer; determining the current position and / or angular velocity of the motor rotor based on the observed value of the back EMF; and controlling the motor based on the current position and / or angular velocity of the motor rotor. This method enables the determination of the current position and / or angular velocity of the motor rotor without a position sensor. Furthermore, the current estimation error does not exhibit reciprocating jumps near the sliding surface, reducing sliding mode chattering and thus avoiding high-frequency chattering at the sliding mode observer output. This effectively improves the accuracy of the determined rotor position and / or angular velocity, thereby enhancing the precision and stability of motor control.
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