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Optimal design of efficient IPM motor using finite element method

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2 Author(s)
Ohnishi, T. ; Dept. of Electr. & Electron. Eng., Okayama Univ., Japan ; Takahashi, N.

Techniques for the optimal design of permanent magnet motors considering rotation are investigated. The nonconforming mesh technique is used to take into account the rotation of the rotor. It is shown that the technique is especially useful for the optimal design using the finite element method, because no modification of mesh is necessary during the rotation. The mesh at each angle of rotation can be obtained by only combining meshes of a rotor and a stator. By using the combined optimization technique of the experimental design method and Rosenbrock's method, the number of FEM calculations can be reduced. By applying the optimal design method, about 40% of volume of permanent magnet of IPM motor and about 15% of the torque ripple can be reduced

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Magnetics, IEEE Transactions on  (Volume:36 ,  Issue: 5 )