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