本論文對電動車用之內藏式永磁無刷馬達的現有設計進行最佳化設計與分析實驗。內藏式永磁無刷馬達被廣泛應用於電動車之輸入源的主因為其具備高功率密度及優秀的輸出轉矩等特點。文中以MotorXP靜磁模擬軟體作為實驗工具，探討以相同磁石、矽鋼片材料與相同範圍之槽滿率數值，改變定子和轉子外型參數，並觀察其對馬達效能特性的影響。本文針對轉矩漣波值進行三種最佳化方式的實驗設計，首先透過直交表建立實驗組合，此方法能有效減少參數間的相互影響，並藉由田口法和模糊田口法之實驗結果統計最佳化分析，可得出優於實驗結果之最佳化組合；反應曲面法則透過Box-Behnken設計方法建立三個水準之實驗組合，以較少之實驗過程即可透過反應曲面法之特性，預測出實驗結果數值，並得出單雙層磁石設計馬達之轉矩漣波最佳化結果優化率分別為84.58%和38.47%。最後選擇優化率較高且製作成本較低的單層磁石內藏式永磁無刷馬達製作原型機，並進行實體與模擬之驗證比對。負載與無負載量測結果與模擬結果誤差值分別為平均轉矩4.35%和3.95%，轉矩漣波為14.49%和75.98%，效率為17.21%和15.07%。負載實驗的量測結果可觀察出原型機之轉矩漣波數值優於原始設計，故驗證上述最佳化與模擬方法適用於轉矩漣波最佳化。

This research carries out the optimization design and analysis experiment of the existing design of the built-in permanent magnet brushless motor for electric vehicles. The built-in permanent magnet brushless motor is widely used in the input source of electric vehicles because of its high efficiency, high power density and excellent output torque. In this paper, the MotorXP magnetostatic simulation software is used as an experimental tool to discuss changing the external parameters of the stator and rotor with the same magnet, silicon steel sheet material and the same range of slot fill rate values, and to observe the influence on the motor characteristics. In this research, the experimental design of three optimization methods are carried out for the torque ripple value. First, the experimental combination will be established through the orthogonal table. This method can effectively reduce the mutual influence between the parameters. Statistical optimization analysis of the results can be used to obtain an optimal combination that is superior to the experimental results; the reaction surface method establishes a three-level experimental combination through the Box-Behnken design method, and the characteristics of the reaction surface method can be obtained with less experimental process, According to the characteristics, the experimental results are predicted, and the torque ripple optimization results of the single- and double-layer magnet design motor are obtained, the optimization rates are 84.58% and 38.47%, respectively. Finally, a single-layer magnet built-in permanent magnet brushless motor with a high optimization rate and low production cost was selected to make a prototype, and the verification and comparison between the model and the simulation were carried out. The error values between the load and no-load measurement results and the simulation results are 4.35% and 3.95% for average torque, 14.49% and 75.98% for torque ripple, and 17.21% and 15.07% for efficiency. The measurement results of the load test show that the torque ripple value of the prototype is better than the original design, so it is verified that the above optimization and simulation methods are suitable for torque ripple optimization.

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