Dynamic optimisation of switching points in switched reluctance drives

Abstract

A new technique for maximising torque capability and improving efficiency of switched reluctance machines (SRMs) is presented. Many SRM control schemes are based on current control, but the new technique exploits the linearity of flux control. The approach makes use of new methods of constraining flux demands according to available torque given by machine characteristics, and does not require any additional feedback signals; only current and rotor position are required. The implementation of the novel technique is described in detail along with simulation results to demonstrate its operation.