Adaptive hysteresis controller for the Switched Reluctance Machines

This paper deals with an adaptive hysteresis controller for the Switched Reluctance Machine (SRM). The classical hysteresis controller provides a high bandwidth, good robustness but it´s characterized by a variable switching frequency. This latter causes the injection of high frequency harmonics into the system that can also cause mechanical vibration and acoustic noise. In this paper, adaptive hysteresis controller based on variable hysteresis band is proposed. This variable band is computed in real time to provide a fixed switching frequency. The performance of the classical and the proposed hysteresis controller has been evaluated. Simulations results and experimental tests are given and show the effectiveness of the proposed controller. The switching frequency is maintained constant and the torque ripples are reduced.