Speed Control of Fault-Tolerant Switched Reluctance Motor Drive with Current and Voltage PWM Control Techniques

Nowadays, switched reluctance motor (SRM) is highly reliable in drive applications because it has a simple construction, high robustness, variable speed applications, low cost, etc. The best advantage of this motor is magnetic independence between the phases and negligible mutual flux linkage between the phases. This drive can operate under one or more fault conditions to maintain rated output without faulted phases, since SRM machines are having fault tolerant capability. In this paper different types of faults that occur in SRM drive are presented and the performance of the closed loop speed control of fault tolerant (open circuit fault) SRM using current and PWM control techniques is analyzed. This control method is applied to an 8/6 SRM prototype when an open circuit fault occurs in semiconductor switch and all the results are verified before and after the fault using MATLAB/Simulink software.