Zaiat, Anatoly ; Puchtler, Steffen ; Harder, André ; Neu, Marcel ; Kirchner, Eckhard (2022)
A comparison of an analytical and a numerical approach to calculate the electrical capacitance of rolling element bearings.
FVA Bearing World. Würzburg (05.07.2022-06.07.2022)
Konferenzveröffentlichung, Bibliographie
Kurzbeschreibung (Abstract)
The behavior of rolling element bearings in an electric circuit is of increasing importance over the last years. On one hand, the knowledge of electric properties is required for the evaluation of bearing damage due to inverter induced bearing currents in electric drives. Therefore, the bearing voltage ratio describes the ratio between the common mode voltage and the bearing voltage and is a function of the electric capacitance of the bearings inside the electric drive. On the other hand, the sensory utilization of the electric properties of the bearing shows a promising concept for condition monitoring and predictive maintenance purposes in various machine applications. By applying a non-harmful electric voltage to the bearing, it is possible to measure the electric impedance and calculate the load of the bearing via its electric capacitance.
Though in both scenarios a precise modelling of the electric capacitance of the rolling element bearing is required, this work shows that the sensory utilization has higher demands on the description of the bearing capacitance. The scope is to compare two fundamentally different modelling approaches and examine their advantages and limitations. The first approach is an analytical approach based on analytic, semi-analytic and empirical equations and the other one is a Finite Volume Method (FVM) approach to calculate the rolling element-raceway contact within the fluid domain of the lubricant, the solid body domain of the rolling element as well as the thermodynamic and electric domain. To improve the comparability of both approaches, the pressure and temperature dependent modelling of the material properties are discussed. Furthermore, the comparison of the calculated values with experimental results allows an outlook for future improvements on each of the modelling approaches.
| Typ des Eintrags: | Konferenzveröffentlichung |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Zaiat, Anatoly ; Puchtler, Steffen ; Harder, André ; Neu, Marcel ; Kirchner, Eckhard |
| Art des Eintrags: | Bibliographie |
| Titel: | A comparison of an analytical and a numerical approach to calculate the electrical capacitance of rolling element bearings |
| Sprache: | Englisch |
| Publikationsjahr: | 5 Juli 2022 |
| Ort: | Würzburg |
| Verlag: | Forschungsvereinigung Antriebstechnik e.V. |
| Buchtitel: | 4th International FVA-Conference |
| Veranstaltungstitel: | FVA Bearing World |
| Veranstaltungsort: | Würzburg |
| Veranstaltungsdatum: | 05.07.2022-06.07.2022 |
| Kurzbeschreibung (Abstract): | The behavior of rolling element bearings in an electric circuit is of increasing importance over the last years. On one hand, the knowledge of electric properties is required for the evaluation of bearing damage due to inverter induced bearing currents in electric drives. Therefore, the bearing voltage ratio describes the ratio between the common mode voltage and the bearing voltage and is a function of the electric capacitance of the bearings inside the electric drive. On the other hand, the sensory utilization of the electric properties of the bearing shows a promising concept for condition monitoring and predictive maintenance purposes in various machine applications. By applying a non-harmful electric voltage to the bearing, it is possible to measure the electric impedance and calculate the load of the bearing via its electric capacitance. Though in both scenarios a precise modelling of the electric capacitance of the rolling element bearing is required, this work shows that the sensory utilization has higher demands on the description of the bearing capacitance. The scope is to compare two fundamentally different modelling approaches and examine their advantages and limitations. The first approach is an analytical approach based on analytic, semi-analytic and empirical equations and the other one is a Finite Volume Method (FVM) approach to calculate the rolling element-raceway contact within the fluid domain of the lubricant, the solid body domain of the rolling element as well as the thermodynamic and electric domain. To improve the comparability of both approaches, the pressure and temperature dependent modelling of the material properties are discussed. Furthermore, the comparison of the calculated values with experimental results allows an outlook for future improvements on each of the modelling approaches. |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet Produktentwicklung und Maschinenelemente (pmd) |
| Hinterlegungsdatum: | 13 Jul 2022 07:52 |
| Letzte Änderung: | 22 Sep 2022 05:29 |
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