Modified Dual Output Cuk Converter-Fed Switched Reluctance Motor Drive With Power Factor Correction

Abstract

The control of a switched reluctance motor (SRM) drive is proposed with a front end power factor correction (PFC) converter. It uses a modified Cuk converter-fed SRM drive to improve power quality at ac mains. The converter configuration consists of two Cuk converters and each of them operates separately for two half-cycles of the supply voltage. The proposed converter generates two identical voltages across two output capacitors to feed a split capacitor converter of a four-phase SRM drive. The proposed pulsewidth modulated ac–dc converter operates in the discontinuous conduction mode to reduce its size and cost by eliminating couple of sensor requirements. The incorporated voltage control loop regulates the dc-link voltage with PFC at ac mains. The SRM is considered for the proposed drive because of its low cost and constructional ease. The motor speed is controlled over a wide range by regulating the PFC converter output dc voltage. The proposed SRM drive is tested for steady-state and dynamic state conditions on a developed prototype in the laboratory. The obtained test results demonstrate good drive performance and line drawn power quality. The input current total harmonic distortion is observed within a limit of a standard.