Original scientific paper

ANALYTICAL CALCULATION OF SHAFT CURRENTS IN THE MOTORS WITH HOMOGENEOUS YOKE

Željko Hederić orcid.org/0000-0001-7265-0932 ; Sveučilište J.J. Strossmayer u Osijeku, Elektrotehnički fakultet
Marinko Barukčić orcid.org/0000-0003-1703-4525 ; Sveučilište J.J. Strossmayer u Osijeku, Elektrotehnički fakultet
Krešimir Miklošević orcid.org/0000-0002-5016-3532 ; Sveučilište J.J. Strossmayer u Osijeku, Elektrotehnički fakultet

Abstract

Literature dealing with the matter of shaft currents mostly elaborates on the methods of motor diagnostics which only observe and analyse harmonics frequencies characteristic for shaft currents. The analytic calculation of the amplitudes of those currents has not been analysed so far for homogenous yoke motors and, in order for correct protection measures to be undertaken, it is necessary to determine exactly the parameters which influence those currents. Shaft currents are an important component of the currents which electrically damage the bearings and usually represent the dominant contribution. This is especially important for low-voltage induction motors which, according to IEC’s data, are the motors with the widest application range in the industry. In this work, the analytic calculation of shaft currents is explained for those motors.

Keywords

analytical calculation; induction motor, homogenous yoke; shaft current

Hrčak ID:

37765

URI

https://hrcak.srce.hr/37765

Publication date:

28.2.2009.

Article data in other languages: croatian

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