Leakage flux penetrating laminated iron cores in power transformers and large generators induces eddy current and local loss. Due to the strong magnetic anisotropy of the lamination structure, the penetrating flux tends to saturate the lamination in its plane, even when the incident stray flux density is low. Therefore, the combined effect of anisotropy and nonlinearity has a great impact on the eddy current distribution and the associated power losses. Moreover, the incident normal flux often interacts with the main flux, where the phase angle between the two fluxes may play a significant role. A measurement device is developed to emulate the actual leakage flux in a steel lamination and the power losses are measured at the flux densities of various magnitudes and phases. The measurement results are compared and interpreted by the results obtained from a finite-element analysis, where the homogenization approach for material modeling is implemented, taking the combined effect of magnetic anisotropy and the saturation into account.

中文翻译：

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正常漏磁通量导致的取向钢叠层中的涡流损耗

漏磁会渗透到电力变压器和大型发电机中的叠片铁芯中，从而引起涡流和局部损耗。由于叠层结构的强磁各向异性，即使当入射杂散磁通密度较低时，穿透磁通也趋于使叠层在其平面内饱和。因此，各向异性和非线性的综合影响对涡流分布和相关的功率损耗有很大的影响。此外，入射法向通量经常与主通量相互作用，其中两个通量之间的相角可能起着重要作用。开发了一种测量设备，以模拟钢叠片中的实际漏磁通，并在各种大小和相位的磁通密度下测量功率损耗。