Stromformung in Reluktanzmachinen

摘要

A current control circuit for a switched reluctance machine provides corner shaping at the end of the active conduction period of a phase in which the phase winding is energised. The pulse width modulated firing pulses are gradually reduced in duty cycle so that the transition between the current in the winding in the active period and the decay of current in a ramp down period is smoothed to reduce the forces leading to vibration and acoustic noise.