Determination of ball bearing impedances under steady-state operating conditions using a further developed rolling contact model with full lubrication
Final Report Abstract
In order to predict the electrical load on the rotor bearings in electric drive systems, it is necessary to determine the rolling bearing capacity with the greatest possible accuracy, taking into account the operating conditions. To this end, a simulation model was developed as part of this project, with the capacity of a rolling bearing being determined by the model, taking into account the operating conditions and the installation situation. The objective of the project was to calculate the rolling bearing capacity by describing the electric field in the rolling contact with the greatest possible degree of detail. However, as the project progressed, it became evident that concentrating solely on the contact area was inadequate for accurately assessing the rolling bearing capacity. However, it is imperative to consider the surrounding environment of the contact area to ensure comprehensive analysis. This outcome is attributable to the modeling strategy that was developed in this project. The modeling was initially developed for axial deep groove ball bearings; however, it was successfully adapted to encompass radial deep groove ball bearings during the project. The deviations between the simulation and the measurements were found to be less than 20% for all operating conditions that were investigated in this study.
Publications
-
Breakdown voltages in thrust bearings: Behavior and Measurement. Tribology Transactions, 66(3), 488-496.
Graf, Simon; Werner, Michel; Koch, Oliver; Götz, Stefan & Sauer, Bernd
-
Impedanzmodellierung eines Wälzlagers – Vergleich von Näherungsgleichungen zu detaillierter EHD-Simulation. Gleit- und Wälzlagerungen 2023, 5-20. VDI Verlag.
Paulus, S.; Gonda, A.; Graf, S. & Koch, O.
-
Influence of Parasitic Electric Currents on an Exemplary Mineral-Oil-Based Lubricant and the Raceway Surfaces of Thrust Bearings. Lubricants, 11(8), 313.
Graf, Simon; Koch, Oliver & Sauer, Bernd
-
Inverter-Driven Electric Motors and Generators: Accurate Analysis of Bearing Capacitance and Identification of Contributors. 2023 IEEE 2nd Industrial Electronics Society Annual On-Line Conference (ONCON), 1–6.
Sangle, Akshata; Gonda, Attila; Sedigh, Saeed; Paulus, Stefan; Graf, Simon; Rahnama, Mehdi; Sauer, Bernd; Koch, Oliver & Götz, Stefan
-
Modelling of the triboelectric contact of a roller bearing. In: 3rd STLE Tribology & Lubrication for E-Mobility Conference, Cleveland, Ohio, USA, 2023
PAULUS, S.; GRAF, S. & KOCH, O.
-
Basic experimental and numerical investigations to improve the modeling of the electrical capacitance of rolling bearings. Tribology International, 193, 109354.
Gonda, Attila; Paulus, Stefan; Graf, Simon; Koch, Oliver; Götz, Stefan & Sauer, Bernd
-
Improved capacitance calculation of thrust bearings by combining EHL- and electric field simulation. In: 5th Bearing World 2024
PAULUS, S.; SANGLE, A.; GRAF, S.; KOCH, O.; SAUER, B. & GÖTZ, S.
-
Simulative and Experimental Characterization of the Tribo- Electrical Contact of Roller Bearings. In: DÖRR, Nicole; GACHOT, Carsten; MARIAN, Max; VÖLKEL, Katharina (Hrsg.): 24th International Colloquium Tribology - Industrial an Automotive Lubrication: Conference documents 2024. Tübingen: expert verlag, 2024, S. 179–180
PAULUS, S.; GRAF, S.; KOCH, O. & GÖTZ, S.
-
Impedanzmollierung von Radialkugellagern mittels elektrostatischer FE-Simulation Impedance modeling of radial ball bearings using electrostatic FE simulation. Gleit- und Wälzlagerungen 2025, 299-310. VDI Verlag.
Paulus, S.; Graf, S. & Koch, O.
