基于凸极追踪的思想，讨论了两种高频信号注入法——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。-Based on the idea of ​ ​ salient pole tracking, the two high-frequency signal injection method- rotating high-frequency voltage signal injection method and pulsating high frequency voltage signal injection method in the operation control of permanent magnet synchronous motor position/speed sensor. Introduced the rotor position of the two high-frequency signal injection method since the detection principle, pointed out that the key technology in two ways, and the application of these two positions since the detection methods to establish a permanent magnet synchronous motor sensorless vector control system simulation model for the simulation comparison. The comparison results show that the pulse of high-frequency voltage signal injection Salient tracking system is simple, static, dynamic speed performance　However, the system of rotating high-frequency voltage signal injection method is easier to implement.