Multiphase Torque-Sharing Concepts of Predictive PWM-DITC for SRM

Abstract

Instantaneous torque control for switched-reluctance-machines (SRMs) with an arbitrary number of phases is introduced in this paper. Direct portability of this control to machines with any number of phases is achieved by the developed multiphase-torque-sharing concept. This concept is also necessary for SRMs where maximum torque can only be achieved by phase overlap of more than two phases. Furthermore, a new torque-sharing strategy for predictive PWM-DITC is presented that minimizes losses in the machine without use of pre-computed current or torque profiles. This low-loss-commutation strategy also works without fixed switching angles.