Design of a short-circuit fault tolerant permanent magnet machine for aircraft application

With the advent of more electric aircraft, the use of electrical actuators instead of hydraulic and pneumatic ones becomes necessary. Those actuators must be fault tolerant in order to ensure the continuity of service even in a faulty operating. In this paper, we will proceed to a constrained design of a Double Star Permanent Magnet Synchronous Machine tolerant to certain faults in healthy and faulty operating. First, we present the sizing of this machine and the strategy adopted in the case of an IGBT short-circuit. Then, modeling of a such machine is detailed. Finally, the performances of this fault-tolerant machine in healthy and faulty conditions are discussed. The analysis of results allows to assess the relevance of the adopted strategy and its limits.