Method, device and electronic device for calibrating cogging torque of synchronous motor

Abstract

The embodiments of the present application provide a method, a device, and an electronic device for calibrating cogging torque of a synchronous motor, wherein, for each rotation period, the characteristic frequency multiplier value and the motor speed of the synchronous motor are obtained when the synchronous motor is running at a low speed; Multiple filter functions are set for characteristic frequency multiplier value and motor speed; based on multiple filter functions, the identification average value corresponding to each preset equal position in the cogging torque period is calculated; multiple identification values ​​are calculated within the rotation period of the synchronous motor The judgment value corresponding to the mean value; judge whether the judgment value is smaller than the pre-judgment threshold value; if so, calculate the cogging torque calibration value corresponding to each equal position based on the identification mean value. The present application can realize the precise calibration of the cogging torque by using the servo driver, without other high-precision servo equipment, and has simple operation and low cost.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a method, device and electronic device for calibrating cogging torque of a synchronous motor. Background technique [0002] Cogging torque is an inherent phenomenon of permanent magnet motors. It is the torque generated in the circumferential direction by the interaction between the permanent magnet magnetic field and the cogging of the armature core when the motor windings are not energized. It is constant and related to the rotor position. The cogging torque will cause the permanent magnet motor to generate vibration and noise during operation, and transmit the pulsating torque to the load through the rotating shaft, reducing the speed and position control accuracy of the system. [0003] In order to reduce the influence of the cogging torque, the calibration of the cogging torque in the prior art mainly includes the lever measurement method and the torque meter method. ...

AI Technical Summary

Problems solved by technology

The cogging torque will cause the permanent magnet motor to vibrate and make noise during operation, and transmit the pulsating torque to the load through the rotating shaft, reducing the speed and position control accuracy of the system

[0003] In order to reduce the influence of the cogging torque, the calibration of the cogging torque in the prior art mainly includes the lever measurement method and the torque meter method. The lever measurement method is relatively simple, and the measurement accuracy is relatively poor, and it cannot reflect the relationship between the cogging torque and the rotor. The specific quantitative relationship of the position can only roughly analyze the characteristics of the cogging torque, so it is mainly used in occasions where the accuracy is not high; the torque meter method uses a high-precision servo system for calibration, although this method can accurately calibrate the cogging Torque, but requires high-precision equipment, complex operation, and high cost

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