Abstract
A 90° Halbach permanent magnet array coreless axial flux permanent magnet synchronous generator for wind power generation is compared with a conventional axial flux permanent magnet generator with cut cake type permanent magnet. 2D analytic model of generator is established. The air gap magnetic fields of two generators are analyzed by analytical method, and the air gap magnetic density and harmonic content are analyzed. Then the influence of different parameters on voltage total harmonic distortion is analyzed by changing the pole arc coefficient, air gap length, permanent magnet thickness and number of turns. Two prototypes of generators are manufactured, and the correctness of the simulation results is verified by experiments.
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