Infuence of Core Characteristics on Inductance Calculations for Modeling of Power Transformers

Author

Abeywickrama, K.G.N.B. ; Podoltsev, Alexander D. ; Serdyuk, Yuriy V. ; Gubanski, Stanislaw M.

Author_Institution

Division of High Voltage Engineering, Dept. of Materials and Manufacturing Technology, Chalmers University of Technology, 412 96 Gothenburg, Sweden. nilanga.abeywickrama@chalmers.se

fYear

2006

fDate

Aug. 2006

Firstpage

24

Lastpage

29

Abstract

Calculations of effective parameters (inductance and resistance) of transformer windings, including core characteristics, are presented in this paper. Both anisotropic nature of the core and eddy currents in the electrical steel sheets are accounted for. A 3D model is developed and used to find out the inductance and resistance of transformer windings in the frequency range from 10 Hz to 10 MHz. It is shown that strongest variations of the magnetic field inside the core and of the effective parameters occur below 10 kHz, whereas the effect of the magnetic core is negligible above 1 MHz.

Keywords

Anisotropic magnetoresistance; Eddy currents; Electric resistance; Frequency; Inductance; Magnetic cores; Power transformers; Steel; Transformer cores; Windings;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial and Information Systems, First International Conference on

Conference_Location

Sri Lanka

Print_ISBN

1-4244-0322-7

Type

conf

DOI

10.1109/ICIIS.2006.365629

Filename

4216549