DITC-direct instantaneous torque control of switched reluctance drives

Abstract

This paper presents an on-line instantaneous torque control technique. The method comprises two novel aspects. Torque is estimated as a function of terminal quantities, i.e. flux linkage and phase current. Hence, the control algorithm is independent of the rotor position. Moreover, high bandwidth drive performance is obtained by implementing a digital torque hysteresis-controller. Thus, the method works without torque distribution functions or auxiliary phase commutating strategies. Therefore, the control algorithm offers a wide drive operating range without the use of a high-resolution shaft position sensor or sensitive position estimation techniques. Experimental and simulation results are presented in this paper.