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首页> 外文期刊>IEEE Transactions on Magnetics >Resistivity and Core Size Dependencies of Eddy Current Loss for Fe-Si Compressed Cores
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Resistivity and Core Size Dependencies of Eddy Current Loss for Fe-Si Compressed Cores

机译：Fe-Si压缩铁心的涡流损耗的电阻率和铁心尺寸依赖性

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In this study, resistivity and core size dependencies of eddy current loss were investigated for Fe-Si compressed powder cores. Over the resistivity of about 0.01 Om eddy current loss is independent on core height, however when the resistivity is lower than about 0.01 Ωm it increases with decrease of the resistivity. And eddy current loss increases as the core height is high. It is supposed that over about 0.01 Ωm eddy current generates only inside each particle, so eddy current loss does not depend on the core height, while under about 0.01 Ωm as eddy current flows through particles, eddy current loss depends largely on core height. Furthermore eddy current loss is proportional to the 1.70th-1.95th power of frequency, and the exponent changes with resistivity. It is suggested that under the situation of intra-particle eddy current, domain wall motions relate to the eddy current loss.
机译：在这项研究中，研究了Fe-Si压粉磁芯的电阻率和涡流损耗的铁心尺寸依赖性。在大约0.01 Om的电阻率之上，涡流损耗与铁心高度无关，但是，当电阻率低于0.01Ωm时，涡流损耗随电阻率的降低而增加。随着铁心高度的增加，涡流损耗也增加。假定仅在每个粒子内部产生约0.01Ωm以上的涡流，因此涡流损耗不依赖于芯高，而当涡流流过粒子时，在约0.01Ωm以下，涡流损耗很大程度上取决于芯高。此外，涡流损耗与频率的1.70-1.95th成正比，并且指数随电阻率而变化。建议在颗粒内涡流的情况下，畴壁运动与涡流损耗有关。

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