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Schlegel, Stephan
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Publications (10/10 displayed)
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- 2022Self-lubricating coatings for high-current connectors
- 2022Electrical Contacting of Aluminum Bus Bars Using Clinching and Functional Elements †citations
- 2022Long-Term Behavior of Clinched Electrical Contactscitations
- 2022Investigations on the influence of mechanical and thermal load on the clamping force of heating rod clamps
- 2021Synthesis and structural analysis of intermetallic compounds in electrical connectionscitations
- 2017Effect of dispersoids on long-term stable electrical aluminium connectionscitations
- 2011Langzeitverhalten von Schraubenverbindungen mit Stromschienen aus Reinkupfer in der Elektroenergietechnik unter besonderer Berücksichtigung der Temperatur
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document
Self-lubricating coatings for high-current connectors
Abstract
For high current carrying plug-in connections, which are used in electrical power supply and in electrical transportation, silver or silver alloys are almost exclusively used as coating materials in order to combine low frictional wear with the lowest electrical contact resistance. In electrically powered vehicles, the charging connectors must withstand thousands or tens of thousands of charging cycles during their service life. Also the environmental conditions differ strongly. However, the use of lubricants, such as those commonly used for switchgears in electrical power supply, is ruled out due to the untrained users, the problematic dosage, and the transfer to possibly unsuitable contact partners. Silver dispersion coatings, in which particles with lubricating properties are embedded, are considered as an alternative.<br/>This publication therefore compares self-lubricating silver dispersion coatings (Ag-C, Ag-WS2) to lubricated and unlubricated coatings. These were already evaluated electrically and mechanically in preliminary tests on model geometries. Subsequent tests on industrial test specimens serve to qualify the various self-lubricating coatings for use. Heating tests as well as friction wear tests under current load and without current load are performed. Finally, the self-lubricating coatings are compared.