MAGNETIC PERMEABILITY MODELS OF Fe-3%Si HIGH-PERMEABILITY GRAIN-ORIENTED ELECTRICAL STEEL
HAO WANG
Technical Center of China Tobacco Yunnan Industrial Co. Ltd. Kunming, Yunnan 650231, P.R. China.
JIANBO ZHAN *
Technical Center of China Tobacco Yunnan Industrial Co. Ltd. Kunming, Yunnan 650231, P.R. China.
QIUFU SHAN
Technical Center of China Tobacco Yunnan Industrial Co. Ltd. Kunming, Yunnan 650231, P.R. China.
YUAN TIAN
Technical Center of China Tobacco Yunnan Industrial Co. Ltd. Kunming, Yunnan 650231, P.R. China.
HONGKUI ZHANG
Shenyang Research Institute of Coal Technology Engineering Group Co. Ltd. Fushun, Liaoning 113122, P.R. China.
NA ZAN
Design & Research Center, AVIC Commercial Aircraft Engine Co. Ltd. Shanghai 200241, P.R. China.
GUANGLEI WANG
Nanjing Iron and Steel Co. Ltd. Nanjing 210035, P.R. China.
YAFENG JI
Engineering Research Center for Department of Heavy Machinery Education, Taiyuan University of Science and Technology, Taiyuan, Shanxi 030024, P.R. China.
*Author to whom correspondence should be addressed.
Abstract
Magnetic properties of highly grain-oriented electrical steel sheets are not uniform in different directions, Standard Epstein samples were sheared at different angles to rolling direction and the magnetic properties were measured. On the basis of the conventional elliptical model and the magnetic properties variation with different angles to the rolling direction, parabolic and hybrid models were established in this paper. Theoretical analysis and experimental results show that when magnetic intensity is lower than 3000 A/m the parabolic model should be adopted, and when the magnetic intensity is higher than 7000 A/m the elliptical model is more appropriate, and while the magnetic intensity is between 3000 A/m and 7000 A/m the hybrid model proposed in this paper should be applied. Piecewise models of magnetic properties simulation possess high fitting degree, which will improve the accuracy of electromagnetic engineering calculations.
Keywords: High-permeability grain-oriented electrical steel, magnetic permeability, elliptical model, parabolic model, hybrid model.