Torque ripple minimization of a switched reluctance motor including mutual inductances via sliding mode control technique

Abstract

Switched reluctance motor (SRM) drives offer the advantages of simple and robust motor construction, high speeds, high overall efficiencies over a wide operating range of torque and speed, simple power converter circuits with a reduced number of switches and excellent controllability. However, the switched reluctance motor has a drawback in that it generates acoustic noise. This study aims to minimize the acoustic noise of a 8/6 switched reluctance motor with sum of the square of the phase currents and variable structure system (VSS) with sliding mode control (SMC) methods in the linear region and in presence of mutual inductances. In this study, the torque ripple of switched reluctance motor has been greatly removed and the acoustic noise has also been reduced. Sliding mode control techniques have been applied to switched reluctance motors in this study and successful results has been obtained. The results show that the sliding mode control is effective in reducing the torque ripple of the motor, compensating for the nonlinear torque characteristics, and making the drive insensitive to parameter variations and disturbances. A mathematical model of a 8/6 switched reluctance motor, the design of the sliding mode controller and simulation results are given in this paper.