基于高频信号注入法辨识转速在异步电动机无速度传感器控制系统中的应用

High-frequency Signal Injection for Speed Identification in Speed Sensorless Control System of Asynchronous Motor

对零低速区域速度的有效辨识是异步电动机无速度传感器控制的一个重要课题。高频信号注入法的提出为实现异步电机在零低速区域的无速度传感器控制提供了很好的解决思路,通过高频信号的注入在异步电动机内产生高频现象,针对不同的现象配合滤波器的设计可达到转速辨识的目的。文中介绍了应用高频信号注入辨识转速的主要方法,以便进一步研究利用,更好地实现无速度传感器技术在电机牵引控制领域的应用。

Effective speed identification in low speed and standstill area is an important item for speed sensorless control of asynchronous motor. The method of high frequency signal injection provides a good idea of speed identification in low speed and standstill area. The injection of high frequency signal will cause different high frequency effects. With proper filter, we can realize speed identification. This paper introduces the main methods of high-frequency signal injection for speed identification. It is meaningful for the further research and utilization and would promote the application of speed sensorless technology in traction drive area.