A PI-based control strategy for mitigation of torque harmonics in switched reluctance motor drives

An issue that often arises in switched reluctance machine (SRM) drives is excessive vibration/noise created by harmonics of electromagnetic torque (torque ripple). In this research, analytical techniques are used to map vibration harmonics to stator current magnitudes and phase angles. The map is used to formulate a proportional plus integral (PI) control that adjusts current amplitude and phase in response to measured vibration. Simulation and hardware results are presented that demonstrate the effectiveness of the proposed methods.