本文旨在研製四相開關型磁阻電動機驅動系統。開關型磁組電動機採用定子8極、轉子6極之結構，其驅動系統利用霍爾偵測元件回授之信號，配合12極磁環進行轉子位置偵測，作為上、下臂分相之判斷，數位信號處理器亦根據此回授之信號作轉速之估測。此外，文中使用電流偵測器提供回授電流至數位信號處理器。功率驅動器方面採用兩組型之架構，每兩相為一組，可作單相及兩相混合激磁控制，對兩相同時激磁時間做調整，以提升效率。本系統之轉速閉迴路控制，兼具降低轉矩漣波及改善運轉噪音之效。

　　本文以16位元數位信號處理器dsPIC30F4011為控制核心，所有控制皆由軟體完成，可減少硬體成本，並增加系統可靠度。本系統之直流鏈輸入電壓為30V，轉速為500~2000rpm，轉矩為0.30 N-m~0.47 N-m，輸出功率為16W~101W，整體效率為31%~59%。加入電流閉迴路後，轉矩漣波降低23%，運轉噪音減少2~4dB。以上之數據驗證了本文控制策略的可行性。

This thesis presents the design of a four-phase switched reluctance motor drive system. The switched reluctance motor consists of an 8-pole stator and a 6-pole rotor. As for the motor drive system, Hall effect sensors are used to detect the required rotor positions for determining the appropriate phase to be excited. In addition, the signals generated from the Hall effect sensors can be transmitted to the digital signal processor for estimating the rotational speed of the motor. Moreover, current sensors are used to detect phase current variations and then transmit to the digital signal processor for further calculation. The two-group topology of the power stage is used so that the hybrid excitation, where single-phase and two-phase are excited alternately over a certain period, can be administered for efficiency improvement. The proposed current control strategy can also reduce torque ripple and noise.

In this thesis, a 16-bit digital signal processor, dsPIC30F4011, is adopted as the control core. The system is controlled by software so that the cost of hardware can be reduced and the reliability can be enhanced. The input dc-bus voltage of the system is 30V. The rotational speed of the motor ranges from 500 rpm to 2000 rpm. The corresponding torque varies from 0.30 N-m to 0.47 N-m. The output power is from 16W to 101W. The overall efficiency ranges from 31% to 59%. Both 23% reduction in the torque ripple and 2dB to 4dB reduction in the noise generated from the motor operation have been obtained after introducing the control method. The proposed control strategy has been verified experimentally.

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[2] 柯柏年，單相昇壓型交流-直流功率轉換器之開關型磁阻電動機驅動系統研製，國立台灣科技大學電機工程學研究所碩士論文，民國九十四年。
[3] 王淳正，開關型磁阻電動機驅動系統設計，國立台灣科技大學電機工程學研究所碩士論文，民國一百零一年。
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