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Prediction of open-circuit airgap field distribution in brushless machines having an inset permanent magnet rotor topology

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3 Author(s)
Zhu, Z.Q. ; Dept. of Electron. & Electr. Eng., Sheffield Univ., UK ; Howe, D. ; Xia, Z.P.

A 2-dimensional analytical model for predicting the open-circuit airgap field distribution in radial-field brushless machines having an inset permanent magnet rotor is developed. It accounts for flux focusing and inter-pole leakage effects and arbitrary pole-arc/pole-pitch ratios, and is also applicable to machines having a surface mounted magnet rotor. Predicted results are compared with finite element analyses, and are shown to be in good agreement

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Magnetics, IEEE Transactions on  (Volume:30 ,  Issue: 1 )