Automatic generation of optimal phase currents for five-phase PMSG control under open phase condition

This paper deals with fault tolerant control of a sinusoidal EMF five-phase permanent-magnet synchronous generator (PMSG) connected to an AC-DC converter without neutral connection. Under one open phase condition, the proposed global method is based on an original approach optimization problem minimizing copper losses and cancelling torque ripples. The used optimization algorithm is based to a Particle Swarm Optimization (PSO) method. The main idea is to generate automatically the best waveform of the phase currents. Two strategies are investigated; both are minimizing the copper losses. In the first approach, the four phases are unbalanced. In the second case, the first approach is improved by adding criteria leading to balanced currents. The obtained currents phase shift and magnitude are analyzed and the performances of the system are discussed.

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