To read the full version of this content please select one of the options below:

Dynamic hysteresis modeling for soft magnetic composites based on isotropic vector play model and Cauer ladder network

Naoya Watanabe (Department of Electrical Engineering, Doshisha University, Kyotanabe, Japan)
Yasuhito Takahashi (Department of Electrical Engineering, Doshisha University, Kyotanabe, Japan)
Koji Fujiwara (Department of Electrical Engineering, Doshisha University, Kyotanabe, Japan)

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering

ISSN: 0332-1649

Article publication date: 24 July 2019

Issue publication date: 21 October 2019

Abstract

Purpose

This paper aims to propose an effective modeling method of dynamic hysteresis properties for soft magnetic composite (SMC) core using an equivalent circuit representation. Because the eddy currents flowing inside iron powder particles should be considered, it is well known that an accurate magnetic field analysis of the SMC core in a wide range of excitation frequency is not easy. To overcome this difficulty, a dynamic hysteresis modeling based on the standard Cauer circuit is investigated.

Design/methodology/approach

In the proposed method, the first inductance represents the static magnetic property of the SMC, and the latter part represents the dynamic effect because of the eddy currents. The values of the circuit elements were determined by an optimization method based on symmetric loops measured at several frequencies. To verify the validity of the proposed modeling method, finite-element analyses of a ring core inductor and an alternating current reactor were performed.

Findings

By comparing the simulated and measured magnetic properties, the necessity to consider magnetic hysteresis in the equivalent circuit model is clarified. Furthermore, the frequency-dependent inductances of practical reactors can be obtained from the finite-element analysis combined with the proposed method.

Originality/value

This paper demonstrates the significance of determining the circuit parameters in the equivalent circuit for dynamic hysteresis modeling based on the measured magnetic properties. The effectiveness of the proposed method is verified by comparing frequency-dependent inductances of two kinds of reactors between the simulation and measurement.

Keywords

Citation

Watanabe, N., Takahashi, Y. and Fujiwara, K. (2019), "Dynamic hysteresis modeling for soft magnetic composites based on isotropic vector play model and Cauer ladder network", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 38 No. 5, pp. 1413-1426. https://doi.org/10.1108/COMPEL-12-2018-0521

Publisher

:

Emerald Publishing Limited

Copyright © 2019, Emerald Publishing Limited