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     Research Journal of Applied Sciences, Engineering and Technology


Improving Permeability of Ferrite Cores Used in Switch-mode Power Supplies

A. Taha, A. Mahgoub, O. Mahgoub and E. Abulzahab
Department of Electrical Power and Machines, Faculty of Engineering, Cairo University, Giza 12613, Egypt
Research Journal of Applied Sciences, Engineering and Technology  2016  10:800-806
http://dx.doi.org/10.19026/rjaset.13.3356  |  © The Author(s) 2016
Received: August ‎1, ‎2016  |  Accepted: September ‎2, ‎2016  |  Published: November 15, 2016

Abstract

In this study two methods are proposed to increase the permeability of ferrite cores used in switch-mode power supply applications. The first method is based on the principle of magnetic shaking where an AC magnetic field is superposed on the magnetic core. This method yields good performance in shielding applications but still facing some technical difficulties in switch-mode power supply applications. The second method is based on superimposing a DC magnetic field component equivalent to the main DC component flowing in the main winding of the switch-mode power supply. This method is verified to reduce the power supply inductor current ripple by 68% while downsizing the core of the winding.

Keywords:

DC bias, magnetic permeability, magnetic shaking, switch-mode power supplies,


References

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Competing interests

The authors have no competing interests.

Open Access Policy

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Copyright

The authors have no competing interests.

ISSN (Online):  2040-7467
ISSN (Print):   2040-7459
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