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Measurement and calculation of rotating anomalous loss in electrical steel sheets considering harmonics and skin effect(PDF)

[ISSN:1007-449X/CN:23-1 408/TM]

Issue:
2016年06
Page:
42-49
Research Field:
Publishing date:

Info

Title:
Measurement and calculation of rotating anomalous loss in electrical steel sheets considering harmonics and skin effect
Author(s):
LI Jing-song1 YANG Qing-xin12 LI Yong-jian1 ZHANG Chang-geng1
 ( 1. Province-Ministry Joint Key Laboratory of EFEAR,Hebei University of Technology,Tianjin 300130,China;
2. Tianjin Key Laboratory of AEEET,Tianjin Polytechnic University,Tianjin 300387,China)
Keywords:
electrical steel sheets Fourier analysis skin effect rotating anomalous loss 3-D magnetic properties
PACS:
TM 271
DOI:
10. 15938 / j. emc. 2016. 06. 006
Abstract:
In order to accurately calculate the rotating anomalous loss in electrical steel sheets,sheets fi-nite element model was simulated by adopting time-stepping finite element method based on Fourier anal-ysis. Then,the key loss coefficients of the sheets were obtained by experimental measurement at low to medium frequencies with considering the influence of eddy current skin effect to the loss coefficients on the basis of rotating core losses calculation model. So,the calculation formula of rotating anomalous loss in electrical steel sheets was deducd indirectly. By using a novel 3-D magnetic properties testing system, the total broadband core losses under elliptical rotation and alternating excitations were carried out for a typical electrical steel laminated specimen. Meanwhile,losses characteristics of the two excitation modes were compared and analyzed quantitatively. The results show that both the losses variations are analo-gous,but varieties of elliptical rotation excitation losses are bigger than the corresponding alternating losses,so it is necessary to consider the influences of harmonic,skin effect and rotating excitation,etc,to the materials properties seriously. The calculation of rotating anomalous loss is relatively small and is not accounted for 5% of the total rotating core losses up to 1k Hz. Thus,it validates the correctness and fea-sibility of the calculation formula and measurement means.

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Last Update: 2016-08-20