Finite control set predictive torque control method for switched reluctance motor drives

In order to solve the problem of high torque ripples, copper losses and fixed flux linkage of traditional direct torque control for SRM drive, this paper presents a finite control set predictive torque control method. Firstly, a discrete predictive model of SRM was established and then the future value of electromagnetic torque of the SRM was predicted using this predictive model. Secondly, a sector partition method of rotor position was developed to simplify the finite set of voltage vectors.As a result, the computational burden was sharply decreased. Finally, all torque prediction values were evaluated by a cost function, and consequently, the voltage vector with minimum cost function was selected as the control output. In this way, the proposed FCS-PTC method can minimize the torque ripple and copper losses, and eliminate the closed loop of flux linkage, which is easier to be implemented in practice.Comparative studies were carried out between the proposed FCS-PTC and traditional DTC, and the results show that the proposed control scheme has a better performance for torque ripples suppression and minimization copper losses. © 2019, Harbin University of Science and Technology Publication. All right reserved.