Design and analysis of high-speed coreless axial flux permanent magnet generatorwith circular magnets and coils

摘要

A high-speed coreless surface mounted axial flux permanent magnet generator withcircular magnets and coils is proposed and studied. The performances of themachine are estimated and optimised by approximate theoretical analysis andcomprehensive three-dimensional (3D) electromagnetic finite element analysis(FEA). Mechanical stresses in the rotor disc developed at high rotational speedare analysed and evaluated by 3D mechanical FEA to ensure the rotor's integrity.Finally, a prototype machine is constructed and tested. Both the experimentaland predicted results have shown that the proposed generator possesses distinctadvantages such as simple structure and high efficiency. The prototype alsodemonstrates its utility as a very low-cost generator.