TU Darmstadt / ULB / TUbiblio

Measuring of electrical currents, voltage and resistance of an axial bearing

Safdarzadeh, Omid ; Weicker, Martin ; Binder, Andreas (2021)
Measuring of electrical currents, voltage and resistance of an axial bearing.
International Joint Conference OPTIM-ACEMP. virtual Conference (02.09.2021-04.09.2021)
doi: 10.1109/OPTIM-ACEMP50812.2021.9590048
Conference or Workshop Item, Bibliographie

Abstract

Bearing currents induced in electrical motors driven with fast switching power electronic inverters lead to bearing surface damages on the raceway. This may be the case especially when the rotor is electrically connected to the earth potential of the system e.g. via the cogging wheels of a coupled gear. In this paper an axial bearing type 51208 is investigated at standstill and in rotation concerning the bearing resistance. The a-spot situations are estimated in standstill based on the measured signals. In rotation the bearing resistance is measured for a range of operating speeds from 0 rpm to 3000 rpm, a range of bearing currents from 0.5 A to 3 A, and two axial forces 180 N (rated condition), 800 N. A special test rig is designed to measure the bearing voltage and current signals without using mechanical brushes in the rotating system to eliminate the contact resistance of the brushes in the measured bearing signals. The results allow to predict the bearing electrical behavior at a bearing current flow through the ground.

Item Type: Conference or Workshop Item
Erschienen: 2021
Creators: Safdarzadeh, Omid ; Weicker, Martin ; Binder, Andreas
Type of entry: Bibliographie
Title: Measuring of electrical currents, voltage and resistance of an axial bearing
Language: English
Date: 5 November 2021
Publisher: IEEE
Book Title: 2021 International Aegean Conference on Electrical Machines and Power Electronics (ACEMP) & 2021 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)
Event Title: International Joint Conference OPTIM-ACEMP
Event Location: virtual Conference
Event Dates: 02.09.2021-04.09.2021
DOI: 10.1109/OPTIM-ACEMP50812.2021.9590048
Abstract:

Bearing currents induced in electrical motors driven with fast switching power electronic inverters lead to bearing surface damages on the raceway. This may be the case especially when the rotor is electrically connected to the earth potential of the system e.g. via the cogging wheels of a coupled gear. In this paper an axial bearing type 51208 is investigated at standstill and in rotation concerning the bearing resistance. The a-spot situations are estimated in standstill based on the measured signals. In rotation the bearing resistance is measured for a range of operating speeds from 0 rpm to 3000 rpm, a range of bearing currents from 0.5 A to 3 A, and two axial forces 180 N (rated condition), 800 N. A special test rig is designed to measure the bearing voltage and current signals without using mechanical brushes in the rotating system to eliminate the contact resistance of the brushes in the measured bearing signals. The results allow to predict the bearing electrical behavior at a bearing current flow through the ground.

Divisions: 18 Department of Electrical Engineering and Information Technology
18 Department of Electrical Engineering and Information Technology > Institute for Electrical Energy Conversion > Electrical Energy Conversion
18 Department of Electrical Engineering and Information Technology > Institute for Electrical Energy Conversion
Date Deposited: 07 Nov 2022 10:59
Last Modified: 20 Feb 2023 14:54
PPN: 505179164
Export:
Suche nach Titel in: TUfind oder in Google
Send an inquiry Send an inquiry

Options (only for editors)
Show editorial Details Show editorial Details