A1 Journal article (refereed), original research

One-Dimensional Model for the Nonlinear Resistive Electric Field Control in Medium-Voltage Rotating Electrical Machines


Open Access publication

Publication Details
Authors: Egorov Dmitry, Pyrhönen Juha
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Publication year: 2021
Language: English
Related Journal or Series Information: IEEE Transactions on Dielectrics and Electrical Insulation
Volume number: 28
Issue number: 2
Start page: 697
End page: 703
Number of pages: 7
ISSN: 1070-9878
JUFO-Level of this publication: 2
Open Access: Open Access publication
Location of the parallel saved publication: http://urn.fi/URN:NBN:fi-fe2021042010994

Abstract

This study provides an insight in the analytical estimation of the
electric field along the surface of a stress grading system (SGS) in the
end-winding region of an electrical machine. An analytical approach is
derived for the field grading materials (FGMs) having power-law
electric-field-dependent conductivity. Despite some limitations, the
introduced model can be used for the preliminary analysis of SGS with
specific geometric and dielectric parameters, both during sinus and
pulsed voltage condition. The analytical considerations are verified
with finite element simulations for 15 markedly different nonlinear
FGMs, which were previously reported in the applications related to the
medium voltage rotating electrical machines.


Last updated on 2021-30-04 at 10:53