Analysis and experimental verification of fault-tolerant performance of a mutually coupled dual-channel SRM drive under open-circuits

The mutually coupled dual-channel switched reluctance machine (DCSRM) is a kind of special machine, which inherently offers high fault-tolerant feature. The purpose of this paper is to analyze and investigate the fault-tolerant performance of the DCSRM at open-circuits. Firstly, the faulty mathematic model of the DCSRM under open-circuit fault is developed with combination of a state and a fault functions. The simulation model of the DCSRM drive based on Matlab/simulink is established for dynamic analysis. To achieve fault-tolerant operation, a speed closed-loop control is performed to maintain the speed as the normal operation. The dynamic performances of the DCSRM under normal and open-circuit faults are predicted. Finally, an experimental setup for a 12/8 DCSRM drive is built for verification. The experimental results at normal, various open-circuit faults and sudden changes of load torque operations are presented to verify the analytical and simulation results and fault-tolerant control strategy of the DCSRM drive system.