本論文旨在開發具不同交流/直流前級之切換式磁阻馬達驅動系統，並比較其性能。首先，瀏覽切換式磁阻馬達驅動系統之ㄧ些關鍵事務，以及一些常用交流/直流轉換器之比較特性。接著，建構一三相橋式整流器供能之切換式磁阻馬達驅動系統，基於較高脈寬調變控制彈性，選用非對稱橋式轉換器建構切換式磁阻馬達驅動系統，藉由所提之換相移位、電流與電壓控制方法，達到較佳之驅動特性，如加速/減速、反轉、再生煞車與高速運轉等特性。
　　在高速運轉時，電流追控能力會漸漸劣化，即便應用換相移位之等值弱磁性，效果也有限制，此時便須將直流鏈升壓。為了達到此目的，本文建構並評估一些具功因校正之交流/直流轉換器，或稱切換式整流器。首先建構一標準全橋式升壓型切換式整流器作為切換式磁阻驅動系統之主動式前級轉換器。因其四象限切換與功因校正之能力，不僅具升壓及良好調節之直流鏈電壓可由市電建立，也可將馬達儲存之動能回送至市電作再生煞車。另外，對於特定不須再生煞車之應用場合，本論文設計實作一三相單開關連續導流模式之升壓型切換式整流器，僅使用單一全額定功率開關，但受限於具稍低之電力品質與稍高之減額特性。最後，開發一主動式功率濾波器輔助之三相單開關升壓型切換式整流器，利用主動式功率濾波器之補償能力，可獲得較好之交流入電電力品質。此外，再生煞車也可以藉由主動式濾波器達成。相較於全橋式升壓型切換式整流器，其使用較低額定之電力開關便可建構成。

　　This thesis goes into the development of switched-reluctance motor (SRM) drives powered by different kinds of AC/DC front-ends and making their experimental comparative evaluation. To begin with, the key affairs concerning SRM drive and comparative features of some commonly employed AC/DC converters are explored. Then a three-phase diode rectifier powered SRM drive is established. The asymmetric bridge converter is adopted to construct the SRM drive owing to its high PWM switching control flexibility. Through applying the proposed commutation shifting, current and speed control approaches, better driving characteristics, including acceleration/ deceleration, reversing rotation, regenerative brake and high-speed driving are achieved.
　　Under higher speeds, the current tracking performance will be gradually deteriorated due to the limited field-weakening effect via commutation advanced shift. The DC-link boosting must be applied instead. To accomplish this goal, some power factor corrected (PFC) AC/DC converters, or called switched-mode rectifiers (SMRs), are established and evaluated. A standard full-bridge boost SMR is first built as the active front-end of the SRM drive. With the help of this four-quadrant SMR, the boostable and well-regulated motor DC-link voltage can be established from the mains with PFC. Conversely, the stored kinetic energy can be recovered to the mains during regenerative braking operation. Next, for some specific applications without regenerative braking, a simple three-phase single-switch boost SMR is designed and implemented. Only one full-rated switch is subject to having lower line drawn power quality and slightly larger derating. Finally, an active front-end with active power filter (APF) assisted three-phase single-switch boost SMR is developed. Thanks to the inherent ability possessed by APF, good line drawn power quality is achieved. Moreover, the regenerative braking can also be accomplished. The three-phase inverter with lower rating compared to those of H-bridge SMR can be used for constructing the APF.

A. Fundamentals of SRM
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