Modelling of losses due to eddy currents and hysteresis in converter transformer cores during failure

Author

Juszczak, E. Napieralska ; Grzybowski, R. ; Brudny, J.-F.

Author_Institution

Tech. Univ. Lodz, Poland

Volume

31

Issue

3

fYear

1995

fDate

5/1/1995 12:00:00 AM

Firstpage

1718

Lastpage

1721

Abstract

The paper deals with the analysis of eddy-currents and hysteresis losses in the core of three-phase transformer supplying a static converter bridge during failure of a diode in this bridge. The applied simulation methods are described as well as the results of an analysis in the most important case: the breakdown of one diode of the bridge produces an internal short circuit disconnected by the fuse. Then the operation continues without one diode, changing greatly the values of all currents and core losses. The computation of all quantities required the application of coupled circuit and field methods

Keywords

bridge circuits; eddy current losses; eddy currents; magnetic cores; magnetic hysteresis; magnetic leakage; modelling; power convertors; power transformers; simulation; transformer cores; converter transformer cores; core losses; eddy current; failure; hysteresis losses; internal short circuit; losses modelling; simulation methods; static converter bridge; three-phase transformer; Analytical models; Bridge circuits; Circuit simulation; Diodes; Eddy currents; Electric breakdown; Failure analysis; Hysteresis; Phase transformers; Transformer cores;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.376366

Filename

376366