Abstract
This thesis is mainly concerned with the development of a digital signal processor (DSP) based switched-reluctance motor (SRM) drive with single-phase Ćuk switch mode rectifier (SMR) front-end. After exploring the structure, physical modeling, commonly used converter and dynamic controls for SRM, a standard diode rectifier fed SRM drive is designed and implemented. The detailed experimental evaluation verifies its satisfactory driving performance in acceleration, deceleration and reversible operations. In addition, further experimental observations are conducted to comprehend some key issues affecting the operating characteristics of SRM drive powered by diode rectifier under higher speed and heavier load. The major observed characteristics include effectiveness of commutation instant shift, effects of DC-link voltage variation and AC input power quality. Next, some possible buck-boost SMR schematics are comparatively explored. Then a Ćuk SMR is established and employed as the front-end of the developed SRM drive. Well regulated DC output voltage and good AC input line drawn power quality are obtained thanks to its continuous currents at both input and output sides. The circuit design, dynamic modeling and performance comparative assessment of the established SMR-fed SRM drive using ramp-comparison current-controlled PWM (RC-CCPWM) and hysteresis current-controlled PWM (H-CCPWM) schemes are all conducted in detail. Finally, for improving the energy conversion efficiency, a bridgeless Ćuk SMR is further developed. And the SRM drives fed by diode rectifier, standard Ćuk SMR, and bridgeless Ćuk SMR are comparatively evaluated.