中文摘要：

针对无位置传感器内置式永磁同步电机（interior permanent magnet synchronous motor,IPMSM）矢量控制系统,通过将滑模观测器和高频电压信号注入法相结合,提出一种可实现在宽调速范围获取准确转子位置信息的混合观测方案。设计基于扩展反电动势模型的滑模观测器,对高频信号注入的滤波器和软件锁相环进行研究,并给出混合观测器的切换控制方法,以保证切换过程锁相环跟踪的同步性。针对无传感器IPMSM系统起动困难的问题,研究了一种初始位置估计方法,先注入高频信号检测磁极位置,再注入脉冲电压矢量来判断极性。最后通过IPMSM无位置传感器矢量控制系统验证了该控制策略的有效性。

英文摘要：

A hybrid observer was proposed for position sensorless vector controlled interior permanent magnet synchronous motor （IPMSM） to achieve wide speed range operation.The observer combined sliding-mode observer with high frequency voltage signal injection.Sliding-mode observer based on extended electromotive force of IPMSM was designed.Digital filter and software phase locked loop （PLL） for signal injection were analyzed.Transient control method was proposed to ensure tracking synchronization of the PLL.To resolve starting problem of IPMSM,practical initial position estimation was adopted.High frequency voltage signal was injected to obtain magnet pole position.Then voltage pulse vectors were injected to identify magnet polarity.Experimental results demonstrate the feasibility of the control strategy by a position sensorless IPMSM vector controlled system.