一种改进的永磁同步主轴电机速度估算方法

An Improved Estimation Method of Permanent Magnet Synchronous Spindle Motor Speed

对永磁同步主轴电机的模型进行分析,提出一种改进的永磁同步主轴电机速度估算方法。该方法根据估算电流与实际电流的误差修正估算速度值,并结合所提出的修正参数选取原则,能准确估算出电机转速。实验表明电机快速加速性能好,能在1s时间内从静止加速到额定转速(6000r/min),高速运行时控制精度高,抗负载冲击能力强,鲁棒性好,适用速度范围宽,低速运行时在低于2%额定转速时仍能满载稳定运行,从而验证了该方法的可行性和有效性。

This paper analyzed the model of permanent magnet synchronous spindle motor,and put forward an improved speed sensorless speed estimation method of permanent magnet synchronous spindle motor.This method corrected the estimated speed values according to the errors between the estimate current and actual current,and presented the selecting principle of the correction parameters,the motor speed might be accurately observated.Experiments show that motor acceleration performance is good,the speed accelerates from zero to rated speed（6000r/min）within 1s,during high speed running the control precision is high,resistance to impact load ability is strong,good robustness,and suitable for wide speed range,under less than 2%of rated speed the motor can be still loaded with stable operation.The experimental results verify the feasibility and effectiveness of the method.