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Analysis and Performance Evaluation of Axial Flux Air-Cored Stator Permanent Magnet Machine with Concentrated Coils

In this paper the performance of air-cored stator axial flux permanent magnet machines with different type of concentrated (non-overlapping) coil windings is evaluated. The evaluation is based on theoretical analysis and is confirmed by finite element analysis and measurements. It is shown that concentrated-coil winding machines can have similar performance as normal overlapping winding machines using less copper.