電磁鋼板における異常渦電流損の算定方法について(パワーマグネティックス)

概要

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This paper discusses the anomalous eddy current caused by magnetic domain wall movement. The anomalous eddy current due to the change of flux space harmonics distribution generated by domain wall movement is generally not affected by steel thickness, but by crystalline grain size. Then, if magnetic flux is concentrated at the steel sheet surface, such as the skin effect, the anomalous eddy current loss increases and weakens the skin effect although classical eddy current decreases. Therefore, it is necessary to use the magnetization curves, taking into consideration the anomalous eddy current loss to estimate the actual eddy current loss, because anomalous eddy current loss cannot be calculated with the usual method, where the DC hysteresis loop is used and microscopic flux distribution is not considered in Maxwell's equation.
社団法人日本磁気学会の論文
2009-03-01