Speed Control of SRM Drive Using Closed Loop Bridgeless SEPIC with P, PI and Fuzzy Logic Controller

The Switched Reluctance Machine (SRM) is used for many application of electric drive system due to
its simple construction and its robustness. Due to doubly salient structure of SRM; the torque
pulsations are high when compared to other sinusoidal machines. The major drawback of using SRM
drive is torque pulsations and increased components in the converter. In order to avoid these
drawbacks a new bridgeless Single Ended Primary Inductor Converter (SEPIC) for closed loop control
of SRM drive is proposed. The proposed converter reduces a conduction loss, input current ripple,
torque ripples and also the Total Harmonic Distortion (THD). The requirements of converter for
switched reluctance motor drives and the proposed new converter are analyzed and discussed. The
torque, current, speed of SRM for the proposed converter is analysed also the speed of SRM is
controlled by applying the conventional P& PI Controller and AI based Fuzzy Logic Controller in
MATLAB simulation. The results are presented for comparison with P.PI and Fuzzy logic controllers.
The simulation results reveals that the new bridgeless SEPIC converter in close loop operation using
fuzzy logic controller provides better results with quicker speed settling time.