近年來，電動車產業在台灣日益受到重視，政府與企業也積極地推廣電動巴士的普及。由於切換式磁阻馬達其轉子無永久磁鐵，在較惡劣的環境也能夠操作，所以強健性高，因此具有高可靠度與低經濟成本等特性，再加上擁有廣泛的定功率操作區間，故適用於做為大型電動載具的動力源。但是，運轉時高轉矩漣波所產生的高震動噪音與較低的轉矩密度，卻是切換磁阻馬達的主要問題。因此本文以製造成本為考量，維持原本的製造技術為原則，利用多極式轉子為設計概念，建立專屬設計流程圖，並整理出用於定、轉子極弧角設計的可行性梯形法，完成低轉矩漣波的多極式切換磁阻馬達設計。再搭配轉子端部的極靴角設計，使轉矩漣波產生明顯的抑制效果。最後以12/8極切換磁阻馬達為實驗目標，進行各項性能模擬與數據驗證，由結果證實，有限元素法(FEA)的分析結果可符合實際馬達實驗測量的特性。

In recent years, electric vehicles have received increasing attention from Taiwan. Governments and enterprises are also actively promoting electric bus industry. Owing to a rigid structure and the absence of magnetic source on the rotor, and they are robust in harsh operational conditions and have a wide constant power speed range. Therefore, switched reluctance machine (SRM) is inherently robust and cost effective, which applies to large-scale electric vehicle power sources. However, the high levels of torque ripple, acoustic noise, and relatively low torque density switched reluctance motor but also a big problem. Therefore, this thesis considered with the cost-effective manufacture, so as not to change the principle of manufacturing technique. Base on the design concept of SRM with higher number of rotor poles than stator poles, this thesis established an exclusive design flow chart, and sorted out for the Feasible Trapezoid which is a principle of stator and rotor pole arc angle design. Above method completed the SRM with higher number of rotor poles than stator poles design to reduce the levels of torque ripple. Then with the design concept of the rotor pole tip, the torque ripple produced significant. Finally, the thesis took 12/8 switched reluctance motor as experimental objectives, to verify the performance of simulation results and the experimental data. Finally, the results evidenced that the finite element analysis (FEA) was consistent with the characteristics of the motor experimental measurement.

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