open access

https://hdl.handle.net/2115/64396

Semi-Analytical Approach for Finite-Element Analysis of Multi-Turn Coil Considering Skin and Proximity Effects

英語

multi-turn coil

2017-01

IEEE

IEEE Transactions on Magnetics

53(1)

7400107

Native application of finite element method (FEM) to analysis of skin and proximity effects in multi-turn coils results in large equation systems whose solution needs long computational time. This paper proposes a semi-analytical approach to overcome this problem. For analysis of the proximity effect, the complex permeability of a round conducting wire immersed in uniform time-harmonic magnetic fields is represented in a closed form. Then, the homogenized complex permeability over the cross section of the multi-turn coil is analytically evaluated using the Ollendorff formula. The magnetoquasistatic problem is thus replaced by the magnetostatic one in which the multi-turn coil is treated as a uniform material with the homogenized complex permeability. The skin effect is taken into consideration by introducing the corresponding impedance in the circuit equation. The proposed method is shown to give the impedance of multi-turn coils which is in good agreement with that obtained by conventional FEM as well as experiments.

学術雑誌論文

Accepted Manuscript

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0018-9464

1941-0069