Comparison of fault tolerant control techniques for quadruple three-phase induction machines under open-circuit fault

A multiphase machine is more reliable than a three-phase one, but it usually shows reduced performance under faulty behaviour. In this paper, the performance in case of open-phase fault is analyzed, and two fault tolerant control algorithms, which aim to minimize the Joule losses in the remaining healthy phases, are compared. The proposed control techniques are validated by numerical simulations, and to prove their effectiveness some experimental results are presented. The experimental tests have been carried out on a quadruple three-phase induction machine, fed by four independent inverters, developed for More Electric Aircraft (MEA) applications.