A Novel Boost Chopper Converter-Based Torque Sharing Function Control Strategy for Switched Reluctance Motors

In this paper, a novel boost chopper converter-based torque sharing function (TSF) control strategy for switched reluctance motors (SRMs) is proposed to reduce the torque ripple. Thanks to advantages of the simple structure, low cost, high reliability, and wide speed range, SRMs have attracted much attention in the industrial applications. However, the torque ripple is one critical issue to restrict the further development for SRMs, which is mainly caused by the doubly salient motor structure and unbalanced electromagnetic torque production in the commutation region. In conventional TSF control methods, the incoming phase torque cannot achieve its torque reference perfectly and the outgoing phase torque cannot drop down to its reference quickly in the commutation region. Therefore, in this paper, a novel boost chopper converter is proposed to overcome the limitation of DC voltage and mitigate the torque ripple by accelerating the excitation and demagnetization processes in the commutation region. The effectiveness of the proposed scheme is verified by the simulation based on a 150 W, four-phase 8/6-pole SRM.