An Offline Iterative Torque Optimization for Extended-Speed Control of Switched Reluctance Motor Drives

This paper proposed an optimization algorithm for torque sharing function (TSF) based on numerical iterative algorithm for switched reluctance motor (SRM). This optimization problem takes minimum rms voltage as the minimum optimization objective, current-limiting and bus voltage as the constraint. It gets free from a particular fitting function, making it has advantages of wide universality. Detailed design process of algorithm is illustrated in the paper. The results show that current-limiting is the main constraint at low speed. While at medium and high speeds, bus Voltage is the main limiting factor. The optimized TSF is applied to a 6/4 SRM. Simulations and experiment have been carried out to verify the effectiveness a of the proposed algorithm.