本研究是從永磁同步馬達的有感測系統再建置到無感測系統，將位置感測器以高頻注入法取代，解決低速時轉子位置，並利用平均值運算，免除掉帶通濾波器的使用，不但可避免帶通濾波器所帶來的振幅降低與相位問題，而且用絕對值相加可以抑制高頻電流雜訊。在實驗內容主要是測試在不同轉速下有載啟動時還能夠正常運轉，以及利用演算法來估測出轉子角度。
實驗架構系統是以STM32F10X晶片為控制的核心，可以有效地降低驅動系統的開發成本，並且只需外加兩個電流感測器來回傳電流資訊讓晶片的ADC做接收。實驗結果可以實現低轉速下無位置感測器控制及利用高頻注入啟動法來代替位置感測器，達到永磁同步馬達無感測器之驅動。

In the research ,the Permanent-magnet synchronous motor starts with position sensor and then builds sensorless system. Position sensor can be replaced by high frequency injection. Furthermore, using average computation to solve rotor position in low speed .It can avoid not only amplitude reduction but also phase problem by exempting band-pass filter. The experiment mainly tests startup with loaded situation enable to normally rotate in different kinds of rotating speed. In Addition, estimated rotor angle can be acquired by making use of the algorithm.
The STM32F10X chip is control core in whole experiment structure. It efficiently lessen the cost of development. Additionally, two current sensors are required to feedback current information to chip’s ADC. In the result, the experiment enable to realize sensorless control in low speed and use high frequency injection to take place of position sensor. In the long run, the destination of sensorless permanent-magnet synchronous motor drive can be attained.

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