迄今各主要工業國均已發展及應用高效能電機，並力求電機性能之穩定，其中永磁式電機的研究應用更是日新月異，工業應用實例不勝枚舉。在設計高效能永磁式電機時，電機的損失對效率影響極為重要，故採用分數槽集中繞組式設計，減少端線之導線長度，來降低電機之電阻損失。直驅式電機具轉動穩定、低震動及噪音、高轉矩精度、高可靠度及壽命、高維護性及高定位精度等。當操作於較低轉速與高荷重時，能輸出高扭矩及高響應速度，故常見於高精度之微細動作及低噪音之應用範例。
本論文針對應用於機械旋轉平台上之永磁直驅馬達為研究方向，整理基礎電機設計方法，規劃電機設計流程與計算設計參數，分析並建構電機系統模擬之架構，以分數槽集中式繞組結構為基礎，進行氣隙磁場分布電腦輔助電磁場數值分析，以優化法則得出最佳化槽極配數及繞線設計，達成高電機定位精度之設計目的。研究過程採用美商ANSYS公司之低頻電磁場RMxprt®及Maxwell 2D/3D®分析模組，以數值方式計算其衍生物理量與電磁場分佈趨勢，針對電機各個靜動態性能之指標參數進行分析，降低不均勻旋轉磁場所產生轉矩漣波，再以商用永磁同步直驅馬達進行設計參數之驗證，確定電機設計之正確性與實現性，以提供工業應用之參考。

Today, major industrial countries have developed various applications of high-performance electric motors; and, they all endeavored to stabilize the motor’s performance. Among the applications, development in PM motors has become prominent in many successful examples. In the design of PM motors with high performance, minimizing power losses is critical to the final efficiency. Hence, the use of fractional-slots with concentrated windings for the reduction in the length of the winding wires is to minimize the copper resistance losses. Since direct-drive motors exhibit stable rotation, low vibration noises, high torque accuracy, high reliability with long service life, high position accuracy and etc. Commonly, the applications are found for high output torque and high responses at lower operational speed.
The objectives of the thesis are to study PM type direct drive motors used in mechanical rotation tables. From basic motor design methodology to analysis of design parameters and CAE simulations, optimized slots/poles combination and windings has been adopted for high positional accuracy. First, CAE commercial software packages, namely RMxprt® and Maxwell 2D/3D® copyrighted by ANSYS Inc., have been adopted for calculation of physical parameters and simulation of the magnetic field distribution. Then, a commercial PM direct drive motor has been experimentally tested for verifications in static and dynamic performance. The thesis could provide a design reference for the electric machinery industry.

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