- 學位論文
以高頻注入法實現 永磁同步馬達之無位置感測控制
Realization of the Position Sensorless Control for a Permanent-Magnet Synchronous Motor with High Frequency Injection Method
摘要
高頻注入法主要是為了省去感測元件的體積及成本，藉由運算直接得到馬達的轉子位置和速度訊號。本系統架構主要包含：永磁同步馬達、三相三線式全橋換流器、輔助電源與微控制器周邊電路等。本論文控制架構主要分為電流PI控制器、速度PI控制器與高頻估測器三部分。高頻注入法適用於靜止啟動與低轉速的場合，藉由注入一個電壓訊號，經由高頻估測器來得到估測轉速與估測轉子位置，再經過速度控制器與電流控制器，搭配傳統的空間向量脈波寬度調變(Space Vector Pulse Width Modulation, SVPWM)控制責任週期比以切換開關，最後透過微控制器將前述的控制方法實現。
關鍵字
高頻注入法並列摘要
The high frequency injection method is mainly to reduce cost and volume of the sensor, and the signal of rotor position and speed can be obtained. The structure of this system includes Permanent-Magnet Synchronous Motor (PMSM), three-phase three-wired full-bridge inverters, auxiliary power supply and the peripheral circuits of microcontroller. The control architecture in this paper are mainly divided into three parts, the current PI controller, speed PI controller, and the high frequency estimator. The high frequency injection method can be applied to standstill and low speed case. By injecting a voltage signals to obtain the estimated speed and estimated rotor position, then performing the speed controller and the current controller. Combined with the conventional Space Vector Pulse Width Modulation (SVPWM) to calculate the duty cycle to switch. Finally, through the micro-controller to achieve the aforementioned control method.