A balanced commutator for three-phase switched reluctance motors to minimize torque ripple

The balanced commutator method of computing the reference currents for current tracking feedback is presented. For a given switch reluctance (SR) motor, the commutator reduces the peaks and the rate of change of the reference currents. This allows accurate current tracking, and therefore minimum torque ripple, over a wider range of operating speeds. Reference current waveshapes for two different SR motors, and the resulting torque ripples, are compared