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Influence of static rotor unbalance on inverter-induced bearing currents

Weicker, Martin ; Safdarzadeh, Omid ; Binder, Andreas (2022)
Influence of static rotor unbalance on inverter-induced bearing currents.
24th European Conference on Power Electronics and Applications. Hanover, Germany (05.09.2022-09.09.2022)
Conference or Workshop Item, Bibliographie

Abstract

The influence of static rotor imbalance on the generation of bearing fluting due to bearing currents is experimentally investigated. For that six inverter-fed induction machines with the rated power of 1.5 kW and three with the rated power of 11 kW were tested with especially prepared bearings. The machines were operated with three different static rotor imbalances (U0, U1, U2) to test the imbalance influence on the fluting effect due to discharge and rotor-to-ground bearing currents. The damaging effect of inverter-induced bearing currents is influenced by the parameters “rotor speed”, “bearing temperature”, “bearing grease” and “grounding conditions” of the inverter-motor-system. The impact of a static rotor imbalance on the damaging process caused by the parasitic bearing currents is so far unknown. Therefore it shall be clarified, if the combination of static rotor imbalance and bearing currents may damage the bearing raceway surfaces much faster than without imbalance. As a concluding result our test procedures showed no acceleration of bearing deterioration due to static rotor imbalances.

Item Type: Conference or Workshop Item
Erschienen: 2022
Creators: Weicker, Martin ; Safdarzadeh, Omid ; Binder, Andreas
Type of entry: Bibliographie
Title: Influence of static rotor unbalance on inverter-induced bearing currents
Language: English
Date: 17 October 2022
Place of Publication: Piscataway, NJ
Publisher: IEEE
Book Title: 2022 24th European Conference on Power Electronics and Applications (EPE'22 ECCE Europe)
Event Title: 24th European Conference on Power Electronics and Applications
Event Location: Hanover, Germany
Event Dates: 05.09.2022-09.09.2022
URL / URN: https://ieeexplore.ieee.org/document/9907127
Abstract:

The influence of static rotor imbalance on the generation of bearing fluting due to bearing currents is experimentally investigated. For that six inverter-fed induction machines with the rated power of 1.5 kW and three with the rated power of 11 kW were tested with especially prepared bearings. The machines were operated with three different static rotor imbalances (U0, U1, U2) to test the imbalance influence on the fluting effect due to discharge and rotor-to-ground bearing currents. The damaging effect of inverter-induced bearing currents is influenced by the parameters “rotor speed”, “bearing temperature”, “bearing grease” and “grounding conditions” of the inverter-motor-system. The impact of a static rotor imbalance on the damaging process caused by the parasitic bearing currents is so far unknown. Therefore it shall be clarified, if the combination of static rotor imbalance and bearing currents may damage the bearing raceway surfaces much faster than without imbalance. As a concluding result our test procedures showed no acceleration of bearing deterioration due to static rotor imbalances.

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 14:05
Last Modified: 02 Mar 2023 09:24
PPN: 505410737
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