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Nonsymmetrical, Nonlinear Aerospace Alternators on Nonlinear Loads

A two-dimensional numerical analysis of the cross section of a homopolar inductor alternator supplying a rectifier load is developed. Besides the effects of the nonlinearities of the magnetic materials, the eddy currents induced in the rotor by the nonlinear load are considered. Results for a 95-kVA homopolar inductor alternator are presented and include magnetic induction and flux distribution at two instants of time, output voltage, eddy current densities, and loss. The theoretical results have been found to be in good agreement with available test data on the alternator.