基于磁畴能量最小化原理的电工钢片磁滞模型

doi:10.19595/j.cnki.1000-6753.tces.L80692

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Abstract As a large number of nonlinear loads are connected to the electric grid, the transformer core works in the harmonic, DC bias and other non-standard magnetized conditions more frequently. Due to the lack of in-depth study on the physical mechanism of magnetization of the material, the traditional hysteresis models are reported to have limited modeling accuracy for the magnetic properties of core material running under the actual working conditions. In this paper, based on magneto-optic Kerr effect magnetic domain dynamic viewer, the domain wall movements of the electrical steel sheet during the process of magnetization were observed. A physical model that contains multiple domain energy was established based on the mechanism of magnetic domain movement in the process of magnetization. Further, the formula of domain magnetization state was obtained by means of the local minimization principle of the total magnetic energy, and the change of volume of magnetic domain and the direction of the magnetic moment were computed. By fitting the measuring data into model parameters, a series of hysteresis loops of electrical steel sheet under alternating magnetization were obtained, and by comparing with the experimental results, it is proved that the model can effectively simulate the magnetic hysteresis curves in the alternating magnetization. The research results in this paper lay a foundation for further research in the physical model of ferro-materials in electrical equipment under complex magnetic properties for actual conditions.

Key words： Hysteresis model energy minimization magnetic domain electrical steel sheet

Received: 09 July 2018 Published: 29 July 2019

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TM27

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	Zhang Wenjie
	Zhang Yanli
	Jiang Wei
	Xia Bin
	Xie Dexin

Cite this article:

Zhang Wenjie,Zhang Yanli,Jiang Wei等. A Magnetic Hysteresis Model in an Electrical Steel Sheet Based on the Minimization Principle of Magnetic Domain Energy[J]. Transactions of China Electrotechnical Society, 2019, 34(zk1): 7-13.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L80692 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/Izk1/7

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