基于小波包互相关方法的异步电动机启动转速测试

Measuring the Starting Speed to the Induction Motor with the Method of Wavelet Packet Cross-Correlation

提出了一种用小波包互相关方法来测试异步电动机启动转速。此法在消除异步电动机启动过程中定子电流内噪声信号的同时较好地保留了反映电机转速信息的齿谐波时频特征。以一个实测的定子启动电流信号为例进行了异步电动机起动转速特性测试仿真,验证了本方法的正确性和可行性。

This paper offers a method of wavelet packet cross-correlation to measure the starting speed of the induction motor. This method eliminates the noise signal in the stator current in the process of the induction motor starting and effectively preserves, the time-frequency characteristies of slot ripples reflecting the information of motor speed. The paper takes the actual starting current signals of a stator as examples to carry out the testing simulation on the induction motor starting speed characteristics, so as to prove the correctness and the feasibility of this method.