永磁交流馬達控制應用中,需在馬達上加裝位置感測器來即時偵測轉子位置,以回傳正確訊號到數位處理器。但加裝轉軸位置感測器增加了製造成本及體積,感測器使用上需考慮環境溫度、濕度以及振動對壽命的影響,降低系統可靠性。為了更符合經濟效益及可靠性,希望能發展出不須加裝轉軸位置感測器的控制技術來達到相同的驅動效果。本文旨在探討內藏型永磁交流馬達使用高頻訊號注入方法來進行轉子位置估測及向量控制法則。文中利用在轉子座標 d 軸電壓命令訊號中注入一高頻訊號,再利用回授之定子電流訊號做訊號處理,進行轉子角度估測。首先說明永磁交流馬達的數學模型,接著介紹向量控制原理,最後探討藉由高頻訊號注入法對轉子角度進行估測。
In the application of the permanent magnet AC motor control , we need the rotor angle by the position sensors, but it will increase the cost of the system and reduce reliability, in the occasions of the low control accuracy or shaft sensor can not be installed, sensorless control method can be widely used. The thesis aims to explore the high-frequency signal injection method of shaft position sensorless control and vector control purposed in the interior permanent magnet AC motor. In this thesis, we injected the high-frequency voltage signal on the d axis in the rotor reference frame and obtained the current information to estimate the rotor position. First of all, we explained the mathematical model of the permanent magnet AC motor, and then introduced the vector control principle, finally, estimated the rotor position by using high-frequency signal injection method.