两种高频信号注入法的无传感器运行研究

基于凸极追踪的思想，讨论了两种高频信号注入法一一旋转高频电压信号注入法和脉动高频电压信号注入法在永磁同步电机无位置，速度传感器运行控制中的应用。分别介绍了两种高频信号注入法的转子位置自检测原理，指出了两种方法实现中的技术关键，并应用这两种位置自检测方法建立了永磁同步电机无传感器矢量控制系统的仿真模型，进行了仿真比较。对比结果表明，采用脉动高频电压信号注入的凸极跟踪系统结构简单，静、动态调速性能较好；但采用旋转高频电压信号注入法的系统更易于实现。

COMPARATIVE INVESTIGATION OF SENSORLESS CONTROL WITH TWO HIGH-FREQUENCY SIGNAL INJECTION SCHEMES

Based on the saliency tracking idea, two high frequency signal injection methods,the rotating high frequency voltage signal injection and fluctuating high frequency voltage signal injection, were discussed. The basic principles of rotor position self-sensing using these high frequency injection and the key techniques in implementation were presented and the simulation models for sensorless vector control systems of a PM synchronous motor were established using two proposed rotor position estimation methods. Comparative study of simulation shows that the saliency-tracking scheme using fluctuating high frequency voltage signal injection possesses simpler configuration and better speed-adjustable performance both in static and dynamic; but it is easier to implement for the saliency-tracking scheme using rotating high frequency voltage signal injection method.