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Fault-Tolerant Voltage Source Inverter for Permanent Magnet synchronous motor

RITESH KUMAR JHA, LINGESWARAN . K

A two level fault tolerant voltage sourse inverter (VSI) for permanent magnetic drives is designed and tested . Generally a two level inverter consists of three legs .In this case an extra (redundant ) leg is added that replaces the fault leg . Extra leg is added by using by back to back connected thyristor this inverter works on both open circuit and short circuit fault . The main advantage is post fault performance is same as normal prefault operation and fault compensation is fast such that there is negligible disturbancein the operation.It is verified by using a field oriented control of a permanent magnet synchronous motor.