High order finite element model for core loss assessment in a hysteresis magnetic lamination

被引：0
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作者：
Zhang, Yu [1 ]
Cheng, Ming-C. [1 ]
Pillay, Pragasen [1 ]
Helenbrook, Brian [2 ]
机构：
[1] Department of Electrical and Computer Engineering, Clarkson University, Potsdam, NY 13699, United States
[2] Department of Mechanical and Aeronautical Engineering, Clarkson University, Potsdam, NY 13699, United States
来源：
Journal of Applied Physics | 2009年 / 106卷 / 04期
关键词：
A dynamic model for evaluating core losses in a hysteretic magnetic lamination is developed and then solved using a high-order finite element method that includes time-history effects. It is demonstrated that the dynamic hysteresis effect; previously used to explain the frequency dependence of B-H loops; is not a fundamental phenomenon of magnetic materials but originates from the skin effect. It arises because the measured flux density is an averaged value over the lamination thickness; and this value is influenced strongly by the skin effect. The study verifies that; unlike the observed dynamic hysteresis effect; the local B-H loop is in fact frequency independent. The developed dynamic core loss model is thus derived based on the frequency-independent B-H loop. It is shown that the developed model can accurately evaluate the losses for different frequencies and thicknesses based on only one set of inputs of an experimental B-H loop at one low frequency without a huge database of experimental losses. © 2009 American Institute of Physics;
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