A new switched reluctance motor drive circuit for torque ripple reduction

This paper presents a new switched reluctance motor (SRM) drive circuit for torque ripple reduction. The main drawbacks of SRMs are large torque ripple and acoustic noise. The torque ripple can be reduced by the stator current waveform shaping. This paper gives ideal stator current waveforms for the flat instantaneous torque. The new SRM drive circuit is proposed to synthesize the actual stator current as close as possible to the ideal ones in waveforms. The computer simulation demonstrates that the new circuit brings much small torque ripple compared with that by the conventional SRM drive circuit.