Tehnički vjesnik, Vol. 15 No. 4, 2008.
Izvorni znanstveni članak
Finite elements method calculation of circular magnetic flux emerged by eccentric position of rotor
Željko Hederić
; Elektrotehnički fakultet u Osijeku, Kneza Trpimira 2b, 31000 Osijek
Stjepan Štefanko
; KONČAR – Institut za elektrotehniku, Fallerovo šetalište 22, 10000 Zagreb
Marinko Barukčić
; Elektrotehnički fakultet u Osijeku, Kneza Trpimira 2b, 31000 Osijek
Sažetak
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.
Ključne riječi
circular magnetic flux; Finite element method; shaft currents
Hrčak ID:
31407
URI
Datum izdavanja:
31.12.2008.
Posjeta: 3.123 *