Electromagnetic Design of Ultrafast Electromechanical Switches

Veikko Puumala, Lauri Kettunen

    Research output: Contribution to journalArticleScientificpeer-review

    18 Citations (Scopus)


    To open electromechanical switches within the range of tens of microseconds, we exploit repulsive electromagnetic forces between current-carrying conductor loops. For this we study the power conversion efficiency from electromagnetic to kinetic form. These studies suggest connecting moving coils in series rather than employing inductive coupling. These techniques are put into practice in two prototype switches: the first one is based on induction and the other on series connected coils. Measurements with a high-speed camera verify that both switches achieve accelerations in the magnitude of 140000 g and breaking distances of 1 mm within 50 μs. The switch with series connected coils obtains 44% greater force than the one based on induction.
    Translated title of the contributionElectromagnetic Design of Ultrafast Electromechanical Switches
    Original languageEnglish
    Pages (from-to)1104-1109
    Number of pages6
    JournalIEEE Transactions on Power Delivery
    Issue number3
    Publication statusPublished - Jun 2015
    Publication typeA1 Journal article-refereed

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