Fault Tolerant Performances of a Double Star PM Synchronous Machine under an IGBT Fault

摘要

In this paper, the performances of a double star permanent magnet synchronous machine fed by two independent voltage source inverters are investigated in presence of an IGBT short circuit. The differential equations system governing the machine is based on equivalent magnetic circuit theory where inductances are calculated thanks to winding functions technique. The impact of the mechanical shift angle β between the two stars on the stator currents and the produced torque is then performed and discussed in both healthy and faulty cases. Simulation and experimental results are compared in a special case.