馬達空間向量控制法則之單電阻電流量測新法

Abstract

本論文提出一種永磁同步馬達基於空間向量控制法則之單電阻電流量測方法，此方法是將負責電流量測之電阻與直流電源形成串聯，取樣流經直流電源之電流，接著配合三相功率元件的開關訊號，辦別出取樣得到的電流與三相相電流的關係，以達到回授電流的目的，進而實現磁場導向控制，並給予計算轉子位置與速度；並針對基於空間向量脈衝寬度調變所造成的限制，進行詳細討論並提出調整策略，使馬達在全速下皆能完成回授電流量測。最後利用STM3210B-MCKIT開發套件(微控器與功率板)，實現於立扇之永磁同步馬達。

The thesis proposed a single shunt register current sensing method of the Space Vector Pulse Width Modulation (SVPWM) Inverters for Permanent Magnet Synchronous Motors (PMSM). It is based on the measurement of the current through the shunt resistor that it puts in the dc bus of the inverter. The sampling timing is provided by the switch electronic signals of the transistors. Then, the three-phase current is used to calculate the rotor position and the velocity and implement the Field Oriented Control (FOC). Some aspects involving the non-ideal behavior of the system and proposed the adjustments strategy are discussed in details. Finally, the proposed method is implemented in a PMSM of the stand fan with STM3210B-MCKIT Development Kit (microcontroller and power boards).