Novel Switched Reluctance Inverter with Fast De-energizing Capability for Four-Phase Switched Reluctance Drive

Abstract

This paper proposes novel switched reluctance (SR) inverter for four-phase SR drive which generates high output torque without compromise in efficiency for medium and high speed operations. In proposed SR inverter drive, the recovered energy of phase windings circulates with help of two boost capacitors. The circulation of energy between two alternate working phase winding provides charging of boost capacitors without phase current overlapping. The de-energization of phase windings makes either of boost capacitor and dc-bus voltage in series. Thus, the phase windings are de-energized with twice negative dc-bus voltage during entire process until SR drive working under absolute torque region. The de-energizing current reduces to zero at faster rate, and therefore proposed SR inverter drive operates at high dwell time as well as utilization of effective torque region. So, the extension of constant torque range generates high output torque without compromise in efficiency. It requires two less no. of IGBTs and additional two capacitors and four diodes as compare to conventional SR inverter. The analysis of working states is presented. The high output torque of proposed SR inverter drive without compromise in efficiency is justified from comparison of both simulation and experimental results with conventional SR inverter drive.

Keywords:

• switched reluctance inverter
• dwell time
• effective torque region
• fast de-energizing
• de-energizing voltage
• single pulse control

Additional information

Notes on contributors

Jhumar Lal Beniwal

Jhumar Lal Beniwal received B.E. from College of Engineering Osmanabad, India and M.Tech. in Power Electronics and Drives from NIT Agartala, India. He received Ph.D. in Power Electronics and Drives from MNNIT Allahabad, India. He is working as Assistant Professor in Government Engineering College Bikaner, India. He has published several papers in international journals and conferences. His research interests are power electronics, active/passive boost topologies, FPGA based controllers, electrical drives and electric vehicle.

Ramesh Kumar Tripathi

Ramesh Kumar Tripathi received B.E. (Hons.) in Electrical Engineering from REC Durgapur, India, and M.Tech. in Microelectronics from IIT BHU, India. He received Ph.D. in Power Electronics from IIT Kanpur, India. He is working as Professor in Electrical Engineering Department of MNNIT Allahabad, India. He has published several papers in national and international journals and conferences. His research interests are power electronics, switch mode rectifiers, utility friendly converter topologies, magnet power supplies, power quality, active power filters and virtual instrumentation.