A common sharing method for current and flux-linkage control of switched reluctance motor

Abstract

In this paper, a common sharing method for current and flux-linkage control is proposed for high performance control of the switched reluctance motor (SRM). The proposed method not only can realize the current and flux-linkage sharing between different phases of the SRM, but also can reduce the torque ripple to a very low level. With the current-sharing method (CSM), the SRM can be controlled without any model information besides the phase number of the SRM. While with the flux-linkage-sharing method (FSM), high control performance can be achieved with inner flux-linkage loop alone. Six control parameters of the common sharing method can make the method possess high adjusting freedom. The CSM and the FSM are applied to speed control of a four-phase 8/6 SRM respectively. The speed controller is composed of the proportional plus derivative (PD) controller and adaptive linear element (Adaline) with sliding mode learning algorithm (SMLA). The comparisons between the control performance of the CSM and the FSM are given. Simulation results certify that the common sharing method can be applied to the current and flux-linkage control of the SRM effectively, and the combined controller can enhance the accuracy and robustness of the speed controller.