本文旨在設計及控制三相永磁式同步電動機，其採用內轉式、10極12槽單齒集中繞及近似斜列之磁石。在永磁式同步電動機設計方面，利用Ansoft公司出品的有限元素電磁場解析套裝軟體 Maxwell_2D作三相永磁式同步電動機之磁路分析及感應電動勢分析，以完成電動機幾何尺寸、鐵心及磁石等材質之設計，並經由量測平台實測參數，以驗證永磁式同步電動機參數之正確性。本文之永磁式同步電動機在轉速於4,200rpm時，其模擬分析之感應電動勢相電壓峰值為105.3V，感應電動勢相電壓總諧波失真率為0.77%。實測部分，感應電動勢相電壓峰值為104V，感應電動勢相電壓總諧波失真率為1.29%，模擬與實測結果相接近。
在永磁式同步電動機控制方面，轉子磁極角位置採用霍爾效應偵測元件及編碼器回授信號，啟動時採用霍爾效應偵測元件回授轉子磁極角位置，穩態時則採用精準度高之編碼器回授角位置，經由查表產生轉子磁極角位置。本系統以德州儀器公司生產之數位信號處理器TMS320F2808為控制核心，並利用直流電源供應器供給之電壓配合驅動器，搭配轉速電流閉迴路控制策略，以提高效率及轉速響應。本文完成轉速4,200rpm，輸出功率255W之永磁式同步電動機之驅動。

This thesis presents the design and control of three-phase permanent-magnet synchronous motors (PMSM). The 10-pole structure with approximate skews is installed by inset permanent-magnet, while the 12-slot is non-overlapping three-phase windings in the stator. The Maxwell_2D is used to analyze characteristics of flux linkage and no-load induced voltage of the designed motor. The geometric dimensions of the designed motor and the material of the permanent-magnet are determined. For rotor speed below 4,200rpm, the simulation results of the peak induced voltage and harmonic distortion are 105.3V and 0.77%, respectively, whereas the peak induced voltage and harmonic distortion measured are 104V and 1.29%, correspondingly.
In the control of the designed motor, the Hall-effect sensors are applied for rotor position feedback when the motor starts, while the encoder is used to measure the rotor position when the motor runs in the steady-state. The digital signal processor TMS320F2808 serves as the control core and is used with the control strategy of speed and current as well as the inverter to increase the efficiency of the designed motor and performance of the speed. A prototype of 4,200rpm and 255W for PMSM drives is built for evaluation. Experimental results verify the proposed design and performance.

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