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Electromagnetic analysis of double-sided axial flux permanent magnet motor with ring-wound type slotless stator based on analytical modeling

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4 Author(s)
Jang-Young Choi ; Dept. of Electr. Eng., Chungnam Nat. Univ., Daejeon, South Korea ; Yu-Seop Park ; Kyoung-Jin Ko ; Seok-Myeong Jang

This paper deals with electromagnetic analysis of double-sided axial flux permanent magnet (AFPM) motor with ring-wound type slotless (RWS) stator. On the basis of magnetic vector potential and polar-coordinate system, the magnetic field solutions due to PM rotor are obtained. In particular, 3-D problem, that is, the reduction of magnetic fields near outer and inner radius of the PM is solved by introducing a special function for radial position. And then, analytical solutions for torque and back-emf are also derived. The predictions are shown in good agreement with those obtained from 3-D finite element (FE) analyses. Finally, based on derived characteristic equations, performance comparison of AFPM motors with concentrated and distributed windings is carried out.

Published in:

Electrical Machines and Systems (ICEMS), 2010 International Conference on

Date of Conference:

10-13 Oct. 2010