Design Method for Improving Motor Efficiency of Switched Reluctance Motor

Abstract

The motor efficiencies of switched reluctance motors (SRMs) are inferior to those of permanent-magnet synchronous motors. This paper describes the design procedure of an SRM to obtain high motor efficiency. The first step in the design procedure makes the principle of improving the motor efficiency clear. The cross-sectional and axial shapes of the rotor and stator cores are designed by using a magnetic field analysis with 2D and 3D finite element methods. A high-efficiency SRM with 12 stator poles and eight rotor poles is designed. The designed SRM is produced experimentally, and it is tested to certify its performance. Its motor efficiency is improved in comparison to the standard SRM having six stator poles and four rotor poles.