基于旋转高频信号法的IPMSM无位置传感器控制

Position Sensorless Control of IPMSM Based on Rotating High Frequency Signal Method

研究了一种利用旋转高频电压信号实现内置式永磁同步电机(IPMSM)无位置传感器控制的方法。利用α-β轴系下的高频电流响应峰值表达式中的位置信息实现对转子空间凸极位置的检测;并通过跟踪高频电流矢量最大幅值所对应的相位角实现对转子磁极极性的辨别,进而构建了完善的转子位置观测器模型。基于此构建了IPMSM的矢量控制系统,分析了系统实现时的信号处理及死区补偿措施,并进行了仿真和实验研究。结果表明:该位置观测器能够有效实现对转子位置的估算,基于此观测器设计的IPMSM矢量控制系统具有良好的稳态和动态性能。

This paper proposes a position sensorless control technique for IPMSM using rotating high-frequency voltage signal. In the α-β reference frames, the rotor space saliency position detection is realized by using the position information in expression of the peak high-frequency current responses; tracking the corresponding phase angle of the maximum amplitude of the high-frequency current vector is used to identify the polarity of rotor pole, and therefore a complete model of rotor position observer is built. Based on this, vector control system for IPMSM is constructed, and the signal processing ability when the system is implemented and the dead-time compensation measures are analyzed in this paper and they are verified by simulation and experimental study. It is concluded that the position observer proposed can effectively estimate the rotor position, and that the IPMSM vector control system designed based on this observer has good steady-state and dynamic performance.