A fast operating magnetically controlled switch for 1 kA

G.B.J. Mulder, H.H.J. ten Kate, A. Nijhuis, L.J.M. van de Klundert

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5 Citations (Scopus)
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The power of fully superconducting rectifiers can be improved by increasing either the operating frequency or the transformer primary inductance [1]. The frequency is usually limited by the recovery time of thermally controlled switches. In order to achieve a higher switching speed, magnetically controlled switches are preferable [1,2]. This paper describes a magnetically controlled switch which can be used for currents up to 500 A at 25 Hz. The switch element, consisting of several Nb1%Zr multifilamentary superconductors, is placed between two concentric solenoids which generate the necessary magnetic field. The Nb1%Zr superconductor is well suited for this purpose because of its relatively low critical field (¿ 0.75 T) and high maximum current density (about 5.109A/m2below 0.3 T).
Original languageEnglish
Pages (from-to)686-689
JournalIEEE transactions on magnetics
Issue number2
Publication statusPublished - 1985


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