考虑定子铁心片间短路时的涡流及涡流损耗的有限元分析

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Abstract A homogenization method is presented to compute the eddy current and associated loss in stator core which hold the interlamination short-circuits based on the finite element method at low frequency. The direct modeling method needs a fine mesh within each sheet and consequently results in large number of unknowns. To avoid modeling individually each sheet, a continuum model with an equivalent conductivity is used to substitute for a number of sheets. As an example of application of the method developed above, the eddy current and resultant losses in a large asynchronous machine core with interlamination short-circuit are computed by using the aid of a 3D finite-element packet which utilizes the T, ψ-ψ formulation. The calculation, based on the continuum model by introducing anisotropic conductivity and on the real lamination model, respectively, are analytical comparison. The results of the comparison display the stator faults analyzed by the continuum model with the isotropic conductivity can satisfy the actual accuracy requirement.

Key words： Homogenization method eddy current equivalent conductivity interlamination short-circuit finite element method(FEM)

Received: 04 May 2013 Published: 05 August 2014

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TM315

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	Meng Dawei
	Xiao Lijun
	Meng Qingwei

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Meng Dawei,Xiao Lijun,Meng Qingwei. FEM Analysis of Eddy Current and Associated Losses Considering Interlamination Short-Circuits in Stator Core[J]. Transactions of China Electrotechnical Society, 2014, 29(7): 19-25.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I7/19

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