Analysis of EMI Reduction Effect of a Magnetorheological Fluid-Gap Inductor in a DC/DC Converter
- Authors
- Sung, Dong-Gyu; Kim, Dong-Hun; Cha, Honnyong; Kim, Su-Han; Byun, Jin-Kyu
- Issue Date
- Mar-2015
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Electromagnetic interference (EMI); leakage flux; magnetorheological (MR) fluid; variable inductor
- Citation
- IEEE TRANSACTIONS ON MAGNETICS, v.51, no.3
- Journal Title
- IEEE TRANSACTIONS ON MAGNETICS
- Volume
- 51
- Number
- 3
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/8791
- DOI
- 10.1109/TMAG.2014.2358675
- ISSN
- 0018-9464
- Abstract
- In this paper, the electromagnetic interference reduction effect of a magnetorheological (MR) fluid-gap inductor in a dc/dc converter is investigated. For a realistic electromagnetic simulation, a prototype MR fluid-gap inductor is built and put in a typical buck converter setup, and the current waveform of the inductor is measured. Based on the measured current waveform, a 3-D time domain finite element electromagnetic analysis is performed considering non-linearity of an MR fluid and complex geometry of the winding. The rms and maximum values of the leakage flux and eddy current losses of the MR fluid-gap inductor are calculated and compared with those of the air-gap inductor. It is predicted that the eddy current heat source due to the leakage flux from the gap is reduced by as much as 75.6% for the MR fluid-gap inductor. To verify the simulation data, the leakage fluxes of both MR fluid-gap and air-gap types of inductors are measured in a dc/dc converter setup, and their experimental results are compared with calculated ones.
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Collections - College of Engineering > School of Electrical Engineering > 1. Journal Articles
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