Full Torque Range Stator Loss Minimization of Post Fault Five-Phase Induction Wind Energy Generators

Five-phase machines (FPIM) have recently gained notable interest in wind energy generation systems thanks to their additional degrees of freedom that keep the machine run steadily under fault conditions. In the available literature, postfault operation of multiphase machines is preferably implemented using two techniques: minimal losses (ML) or maximum torque per ampere (MT) techniques. In the ML scenario, the optimization problem aims at minimizing the stator Joule losses. This paper revisits a five-phase induction motor's postfault operation of under a single open phase fault with optimizing the stator loss machine optimal currents calculation over the full loading range. The proposed algorithm, which combines the advantage of both MT and ML techniques, attempts to minimize the five phase machine stator losses induced by the current components of both the fundamental aft and the secondary xy subspaces. A detailed simulation study to a 1.5kW five-phase induction machine based on MATLAB has been conducted to validate the proposed optimal controller.