Single-stage power-factor-corrected converter for switched reluctance motor drive

A new single-stage power-factor-corrected converter is proposed to improve input power factor for an efficient switched reluctance (SR) motor drive. The proposed converter uses the winding of SR motor as an input inductor for power-factor-correction. Converter switches play two important roles; one is to improve the input power factor and the other is to excite the motor phase. Consequently, ac-to-dc power converter and SR motor driver are incorporated into one power stage, so called a single-stage approach is realized; thus, it shows a simple structure. A laboratory prototype to drive a single-phase 6/6-pole SR motor is manufactured to evaluate the performance of the proposed drive system. Design example is given in detail, and the validity of the proposed converter is verified by experimental results.