Suppression Control of Torque and Radial Force Ripples in Vector Controlled Switched Reluctance Motors

Abstract

This paper proposes a torque ripple suppression control method considering the radial force ripple to reduce the torque ripple and vibration generated when a switched reluctance motor is driven by vector control. The proposed method is based on the estimated torque and radial force derived using theoretical equations, and it superimposes harmonic currents on the q-axis current reference to cancel out the ripple components of torque and radial force. Moreover, the effectiveness of the proposed method has been demonstrated through experiments. At 300 min^-1, it was observed that the amplitudes of the sixth harmonic components, which are the main component of the torque and radial force ripples, are suppressed by 14.5% for torque and 14.8% for radial force compared with those of the conventional control for a certain combination of gains introduced in the proposed method. In addition, the noise suppression effect of the proposed method was measured using a sound level meter.