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A Polymer-Bonded Magnetic Core for High-Frequency Converters

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4 Author(s)
Weimin Wang ; Dept. of Electr. Eng., Hong Kong Polytech. Univ., Hong Kong, China ; Cheng, K.W.E. ; Ding, K. ; Chan, T.F.

This paper presents a polymer-bonded magnetic core (PBMC) for high-frequency converters. The material of the magnetic core is composed of polymer matrices and special magnetic powder. With these materials, lightweight, nonbrittle, low-cost magnetic cores can be produced with flexible shapes and different dimensions. The magnetic field of an EI-type PBMC used for fly-back converter is obtained using two dimensional (2-D) finite element analysis (FEA). The detailed energy conversion process is studied with 2-D, direct-coupled field-circuit, and time-stepping FEA. The electromagnetic power conversion of the converter is illustrated with circuit and field analysis result. A 100 W fly-back converter is implemented with a novel-developed PBMC. The analysis is verified by experimental results, and the application feasibility is validated with the PBMCs for power conversion.

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Magnetics, IEEE Transactions on  (Volume:48 ,  Issue: 11 )