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Design Optimization of a Permanent Magnet Synchronous Generator for Low-Speed Wind Turbine Applications

This paper presents six design alternatives of permanent magnet synchronous generator for low-speed wind turbines. The design approach followed is an iterative process, based on the results of finite element analysis (FEA). For this purpose, two software were used which are ANSYS electronics, and Motor-CAD. This paper targets two configurations, which are surface mounted magnets and interior magnets. The design procedure starts with the stator and rotor design, then winding configuration design, and finally axial length optimization. This was done while maintaining high generator’s performance. The final design achieved, on one hand, high air gap flux density values (around 1.2 T). On the other hand, the terminal voltage level varied between 97 V and 224 V depending on the axial length (at constant rotational speed of 400 rpm).