Abstract
A digital signal processor (DSP) based switched-reluctance motor (SRM) drive with buck-boost switch-mode rectifier (SMR) front-end is designed and implemented in this thesis. First, the basic issues of a SRM drive are explored to comprehend its structural features, converter circuits, driving control, and some key affairs affecting its performance. Then a standard diode rectifier-fed SRM drive is established. Two off-the-shelf three-phase intelligent power modules (IPMs) are employed to construct the SRM asymmetric bridge converter. Satisfactory driving performance is yielded by properly designing its commutation, current control and speed control schemes. Next in power quality control, a buck-boost SMR is used as a front-end for establishing well-regulated and boostable DC-link voltage for the SRM drive from utility grid. Owing to the inherent voltage transfer feasibility possessed by this type of SMR, good DC output voltage and AC input power quality control performances are obtained via proper control scheme design. It follows that the improved SRM winding current and speed responses are yielded accordingly. For achieving the miniaturization of control environment, the control algorithms of two power stages are digitally realized using a common DSP. Finally, the performance evaluation for the whole SMR-fed SRM drive is conducted experimentally. The evaluated characteristics include the effects of commutation advanced shift, the DC-link voltage boosting, the DC-link voltage regulation control, and the AC line drawn power quality.