Estimation of ripple and inductance roll off when using powdered iron core inductors

Conference paper (2016)

Authors

G.R. Chandra Mouli DC systems, Energy conversion & Storage - EEMCS
Jos Schijffelen Power Research Electronics BV
P. Bauer DC systems, Energy conversion & Storage - EEMCS
M. Zeman Electrical Sustainable Energy
Research Group
DC systems, Energy conversion & Storage (EEMCS) (TU Delft)
Copyright: © 2016 G.R. Chandra Mouli, Jos Schijffelen, P. Bauer, M. Zeman
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Published Date

2016

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Electrical Sustainable Energy

Research Group

DC systems, Energy conversion & Storage

Abstract

Magnetic cores like powdered iron cores have a variable permeability, which is dependent on the magnetic motive force of the inductor windings. When inductors are designed using such materials, the inductance varies as a function of the inductor current. This causes a non-linear current to flow through the inductor. In this paper, mathematical derivation of the inductancecurrent relationship is derived for such inductors. The model is applied for a KoolMmu(r) powdered iron core and the results are verified experimentally using an interleaved boost converter.