Original scientific paper

Finite elements method calculation of circular magnetic flux emerged by eccentric position of rotor

Željko Hederić ; University of Osijek, Faculty of Elektrical Engineering in Osijek, Kneza Trpimira 2b, 31000 Osijek, Croatia
Stjepan Štefanko ; KONČAR – Institute for Elektrical Engineering, Fallerovo šetalište 22, 10000 Zagreb, Croatia
Marinko Barukčić ; University of Osijek, Faculty of Elektrical Engineering in Osijek, Kneza Trpimira 2b, 31000 Osijek, Croatia

Abstract

The main causes of shaft currents in the low-voltage asynchronous motors (with homogeneous yokes) supplied from the net are the eccentric position of rotor in the stator bore and nonlinearity of magnetizing curve of electrical steel of the motor stack lamination. Circular magnetic flux emerged by those causes, produces shaft currents closed in the circuit: shaft, bearing, bearing shield, housing, bearing shield, bearing and shaft. The article describes the calculation procedure of circular magnetic flux, which determines shaft currents, conducted by the Finite element method by means of which quantity and frequency spectrum of that flux can be analyzed.

Keywords

circular magnetic flux; Finite element method; shaft currents

Hrčak ID:

31407

URI

https://hrcak.srce.hr/31407

Publication date:

31.12.2008.

Article data in other languages: croatian

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