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Analysis of the electrical impedance of graphite and silver graphite carbon brushes for use in the impedance measurement of sensory utilizable machine elements

Hausmann, Maximilian ; Schirra, Tobias ; Kirchner, Eckhard (2023)
Analysis of the electrical impedance of graphite and silver graphite carbon brushes for use in the impedance measurement of sensory utilizable machine elements.
In: Machines, 11 (11)
doi: 10.3390/machines11111009
Artikel, Bibliographie

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Kurzbeschreibung (Abstract)

The ongoing digitalization of processes and products in mechanical engineering is accompanied by an increasing demand for data. In order to provide this data, technical systems are being extended with sensory functions. To supply those sensory functions on rotating elements—such as shafts—with electrical energy, and to be able to transmit signals out of the system, sliding contacts can be used as a cost-effective and established solution. However, if electrical properties of machine elements are utilized for sensing purposes, such as condition monitoring of rolling element bearings by means of impedance measurement, sliding contacts are directly in the measurement path and can thus influence the measured impedance. The aim of this paper is to analyze the impedance of graphite and silver graphite carbon brushes under different rotational speeds, in different positions, and with different carrier frequencies. The material of the carbon brushes as well as the position have significant effects on the impedance behavior. Furthermore, carbon brushes show a significant running-in behavior. The results are discussed, and indications for use in impedance measurements are given. Silver graphite carbon brushes in axial positioning are particularly suitable for impedance measurements of sensory utilizable machine elements. Sufficient running-in time must be considered.

Typ des Eintrags: Artikel
Erschienen: 2023
Autor(en): Hausmann, Maximilian ; Schirra, Tobias ; Kirchner, Eckhard
Art des Eintrags: Bibliographie
Titel: Analysis of the electrical impedance of graphite and silver graphite carbon brushes for use in the impedance measurement of sensory utilizable machine elements
Sprache: Englisch
Publikationsjahr: 3 November 2023
Ort: Basel
Verlag: MDPI
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Machines
Jahrgang/Volume einer Zeitschrift: 11
(Heft-)Nummer: 11
DOI: 10.3390/machines11111009
URL / URN: https://www.mdpi.com/2075-1702/11/11/1009
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Kurzbeschreibung (Abstract):

The ongoing digitalization of processes and products in mechanical engineering is accompanied by an increasing demand for data. In order to provide this data, technical systems are being extended with sensory functions. To supply those sensory functions on rotating elements—such as shafts—with electrical energy, and to be able to transmit signals out of the system, sliding contacts can be used as a cost-effective and established solution. However, if electrical properties of machine elements are utilized for sensing purposes, such as condition monitoring of rolling element bearings by means of impedance measurement, sliding contacts are directly in the measurement path and can thus influence the measured impedance. The aim of this paper is to analyze the impedance of graphite and silver graphite carbon brushes under different rotational speeds, in different positions, and with different carrier frequencies. The material of the carbon brushes as well as the position have significant effects on the impedance behavior. Furthermore, carbon brushes show a significant running-in behavior. The results are discussed, and indications for use in impedance measurements are given. Silver graphite carbon brushes in axial positioning are particularly suitable for impedance measurements of sensory utilizable machine elements. Sufficient running-in time must be considered.

Freie Schlagworte: digitalization, sensor integration, sensing machine element, sensory utilizable rolling element bearing, sliding contact, impedance analysis
Zusätzliche Informationen:

Artikel-ID: 1009

Fachbereich(e)/-gebiet(e): 16 Fachbereich Maschinenbau
16 Fachbereich Maschinenbau > Fachgebiet Produktentwicklung und Maschinenelemente (pmd)
Hinterlegungsdatum: 06 Nov 2023 06:35
Letzte Änderung: 08 Mai 2024 07:54
PPN: 512958319
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