Development of MnZn ferrite as a transformer core material for switsh-mode power supplies (SMPS)

Maspol, Masdhiah (2001) Development of MnZn ferrite as a transformer core material for switsh-mode power supplies (SMPS). Masters thesis, Universiti Pertanian Malaysia.

[img] PDF
1997Kb

Abstract

In electronics, magnetic transformer using ferrite cores are widely applied. In the recent years the rapid growth in popularity of Switched Mode Power Supplies (SMPS) units has led to a corresponding demand for high frequency ferrite cored power transformer. The main motivation for using ferrite transformer cores is the dramatic reduction of eddy current losses when compared with traditional iron core transformer. This study has been carried out to improve processing and understand the loss mechanisms of manganese zinc (MnZn) ferrite to meet the SMPS requirements. The preparation of the samples was typical for MnZn ferrite production utilizing wet method technique. The experimental work was divided into three parts namely the effect of composition, the effect of atmosphere control and the effect of additives. The effect of composition showed that MnZn ferrite sample with chemical composition of (MnO)0.335(ZnO)0.130 (Fe203)0.535 yield high initial permeability. µi values. The effect of controlling of the sintering atmosphere with the same composition did not achieve the desired result.µi dropped and Relative Loss Factor decreased. The effect of additives showed that 1n203 addition suppresed grain growth and V 20S cause duplex structure. which is the main reason, the µi declined. This can be concluded that to improve the magnetic characteristics is by controlling the microstructure by having an appropriate and proper controlling sintering scheme.

Item Type:Thesis (Masters)
Subject:Ferrite cores - Case studies
Subject:Ferrites (Magnetic materials)
Chairman Supervisor:Associate Professor Mansor Hashim, PhD
Call Number:FSAS 2001 5
Faculty or Institute:Faculty of Environmental Studies
ID Code:9195
Deposited By: Tuan Norasiah Tuan Yaacob
Deposited On:12 Jan 2011 07:11
Last Modified:14 May 2012 03:57

Repository Staff Only: item control page

Document Download Statistics

This item has been downloaded for since 12 Jan 2011 07:11.

View statistics for "Development of MnZn ferrite as a transformer core material for switsh-mode power supplies (SMPS)"


Universiti Putra Malaysia Institutional Repository

Universiti Putra Malaysia Institutional Repository is an on-line digital archive that serves as a central collection and storage of scientific information and research at the Universiti Putra Malaysia.

Currently, the collections deposited in the IR consists of Master and PhD theses, Master and PhD Project Report, Journal Articles, Journal Bulletins, Conference Papers, UPM News, Newspaper Cuttings, Patents and Inaugural Lectures.

As the policy of the university does not permit users to view thesis in full text, access is only given to the first 24 pages only.