Modeling of Dual-Phase Composite Magnetic Material and Its Application in Transformers

Yang Liu, Fuyao Yang, Yu Han (), Jie Gao, Dezhi Chen and Haonan Bai
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Yang Liu: State Key Laboratory of Advanced Power Transmission Technology, Beijing 102209, China
Fuyao Yang: State Key Laboratory of Advanced Power Transmission Technology, Beijing 102209, China
Yu Han: State Key Laboratory of Advanced Power Transmission Technology, Beijing 102209, China
Jie Gao: State Key Laboratory of Advanced Power Transmission Technology, Beijing 102209, China
Dezhi Chen: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Haonan Bai: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China

Energies, 2024, vol. 17, issue 6, 1-19

Abstract: Dual-phase composite magnetic materials have magnetic and permanent magnetic properties. They can realize the dual-phase conversion of soft magnetic and permanent magnetic composites with a small amount of excitation energy. They have the advantages of good control and conversion characteristics and save energy, and they have a wide range of application scenarios in regard to power equipment. In this paper, the magnetization modeling of dual-phase composite magnetic materials is carried out based on micromagnetic theory, and a specific mathematical expression is given. Secondly, the preparation process of the dual-phase composite magnetic material is studied, the dual-phase composite magnetic material is prepared, and the demagnetization curve of the dual-phase composite magnetic material is measured. Finally, the application of dual-phase composite magnetic materials in power equipment is carried out. Using the soft magnetic and permanent magnetic characteristics of dual-phase composite magnetic materials, their impact on DC bias suppression in transformers is assessed. Magnetic circuit reluctance theory is used to develop the structure and electromagnetic design of a transformer. A transformer prototype with DC bias suppression ability based on dual-phase composite magnetic materials is manufactured, and simulation and experimental research are carried out. The simulation and experimental results verify the correctness of the proposed scheme. Although this scheme requires a more complex core structure, the energy-saving effect is remarkable without changing the transformer’s neutral grounding. The indicators meet the actual requirements of the project.

Keywords: dual-phase magnetic material; compensation; power transformer; DC bias; structural design; electromagnetic design (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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