本論文旨在研究模糊控制法則於「外轉式切換磁阻馬達(switched reluctance motor with external rotor)」降低轉矩漣波(torque ripple)之研究。首先介紹外轉式切換磁阻馬達之結構、特性、切換操控原理及數學模式之建立，接著研究因馬達凸極結構及換相過程中轉矩漣波產生之原因，提出利用模糊控制法則以降低該馬達轉矩漣波。
本實驗架構之控制器以具浮點運算功能之32位元數位訊號處理器（digital signal processor, DSP）TMS320VC33來實現系統。並於控制迴路中加入模糊控制器，依馬達之電流及轉速的變動，調控提前導通及截止角度，最後由模擬和實驗結果來驗証所提之模糊控制控制方法可降低該馬達之轉矩漣波及增加平均轉矩，並同時提升馬達之轉矩及改善轉速響應效能。

In this thesis, the fuzzy control algorithm is applied to reduce the torque ripple of the switched reluctance motor with external rotor. First, the structure, property, operation and the mathematical model of switched reluctance motor with external rotor are introduced. In addition, the torque ripple generated by the salient structure and commutation of the motor is discussed. More over, applying the fuzzy control scheme to reduce the torque ripple of the switched reluctance motor is proposed.
In the experiments, the controller is implemented using a 32-bit floating-point digital signal processor（DSP）TMS320VC33. The fuzzy control algorithm is applied to automatically adjust the angle of turn-on and turn-off of the converter in accordance with the current and speed of the motor. Finally, simulation and experimental results demonstrate that the proposed fuzzy control scheme is feasible to reduce the torque ripple of the switched reluctance motor with external rotor and increase the average torque. So, the torque and speed responses of the switched reluctance motor are improved using the proposed control scheme.

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