Currently, the situation of the powernet in cars is characterized by the increasing power demand for additional comfort features and the ongoing process to gain fuel efficiency by the replacement of mechanically driven actuators through electric actuators. Examples are a heated steering wheel or an electric power steering. Furthermore, new features like an electric valve train or x-by-wire systems with electric actuators need a high budget powernet, capable of high dynamic loads. By increasing the voltage from 14V to 42V, the conditions for the use of e.g. an integrated starter generator, which can also be used for recuperation, are set. This article is not meant to question the new 42V standard, the intention of this article is to inform about the possible emergence of arcing between two electric conductors or contacts, the safety risk and possible passive arcing avoidance mechanism, focused on low- and mid-power arcs. The higher voltage is pushing the typical powernet in a car over the arcing limit, which is for most contact materials between 14 and 20V. Due to this, the development of stable arcs between small distances is possible. For a fast introduction of the 42V powernet it is necessary to develop safe solutions for the arcing problem while keeping the price for the wire harness reasonable. Passive anti-arcing-mechanisms are an appropriate method to take the edge of the problem. Especially the blow out connector seems to have some potential, but it still has to prove it's effectiveness in real life. One critical point might be the timing, that the air channel opens simultaneously with the electric contacts. Another point is the question, especially for small pitches, if the air flow is always strong enough to extinguish the arc. To develop the optimal solution, there still has work to be done. It will probably be best to combine different approaches.


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    Titel :

    42V arcing faults: emergence, safety risk, avoidance


    Weitere Titelangaben:

    42V-Lichtbogenüberschläge: Auftreten, Sicherheitsrisiko, Vermeidung


    Beteiligte:
    Langhoff, W. (Autor:in) / Dreyer, H. (Autor:in)


    Erscheinungsdatum :

    2003


    Format / Umfang :

    7 Seiten, 6 Bilder, 11 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch






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