A new vibration reduction control strategy of switched reluctance machine

Abstract

This paper proposes a control strategy capable of reducing the vibration while keeping a low torque ripple for a switched reluctance machine (SRM). The aim is to minimize the variation of the radial force and to optimize the torque control parameters. At first, the torque ripple reduction method is introduced, for which an off-line optimization of control parameters is adopted. Then, the vibration reduction is achieved by Direct Force Control (DFC), whose purpose is to reduce the variation of the sum of radial forces. However, in order to cope with the drawback of DFC that amplifies the torque ripple, a reference current adapter is proposed based on the limitation of torque and radial force variations. The reference current adapter produces an auto-tuning reference current that achieves a tradeoff between torque ripple and vibration. Finally, simulation results are presented to validate the effectiveness of the proposed control method under different operating points.