Axial flux interior permanent magnet synchronous motor with sinusoidally shaped magnets

A new permanent magnet design for axial flux interior permanent magnet (AFIPM) motor is described in this paper. Poleshoes are traditionally used to produce sinusoidal flux linkage and sinusoidal EMF especially in the case of radial flux synchronous machines. Poleshoes are not a practical solution in the case of axial flux PM machine. The use of poleshoes its the production of sinusoidal back EMF may be avoided by using new magnet shaping which produces sinusoidal EMF itself. The complex machine geometry of AFIPM machine with the proposed magnet shaping result that analytical and 2D Finite Element Method (FEM) calculations do not perform well enough. As a result, AFIPM synchronous motor with the proposed magnet shaping is studied after analytical and 2D FEM calculations by using 3D FEM model.