An optimal design of a 5MW AFPMSM for wind turbine applications using analytical model

In this paper an optimized design procedure for the axial flux permanent magnet synchronous machines (AFPMSMs) for large scale wind turbines is introduced. In this paper, the design for a 5MW wind turbine AFPMSM is introduced, analyzed, and validated. In this design, an efficient analytical model is used that is capable of obtaining all the electromagnetic parameters in a very accurate way. The structural mass is the most dominant mass in large wind turbines. Therefore, inclusion of this mass in the design is done. The effect of using multi-stages on the electromagnetic performance, the cost, and the the total mass of the machine is also introduced. Two types of structural mass are introduced. One with solid disk structure and another machine with ring type structure. The comparison of both structures on the electromagnetic performance is studied. Moreover, a comparison of different available market generators is proposed. In this comparison, the ring type AFPMSM has proven great robustness in terms of cost and mass to torque ratio. A complete 3D finite element (FE) validation has proven the robustness of the analytical model.

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