A fast operating magnetically controlled switch for 1 kA


Mulder, G.B.J. and Kate, H.H.J. ten and Nijhuis, A. and Klundert, L.J.M. van de (1985) A fast operating magnetically controlled switch for 1 kA. IEEE Transactions on Magnetics, 21 (2). pp. 686-689. ISSN 0018-9464

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Abstract: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).
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Copyright:©1985 IEEE
Science and Technology (TNW)
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