Device for limiting current of the resistive type with a strip-shaped high TC superconductor
A current-limiting device and superconductor technology, applied in superconducting devices, devices and circuits that can be switched between superconducting and normal conducting states, can solve problems such as buffer layer breakdown
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[0019] The strip conductors shown generally at 2 in FIG. 1 are based on the per se known embodiment of so-called YBCO strip conductors or “YBCO-coated conductors”. In this figure:
[0020] 3 denotes a substrate strip consisting of a normally conductive substrate metal of thickness d3,
[0021] 4 denotes at least one buffer layer of a special oxidized buffer material with a thickness d4 arranged on the substrate strip,
[0022] 5 represents the HTS layer composed of YBCO with a thickness of d5,
[0023] 6 denotes a protective layer consisting of a normally conductive protective layer metal of thickness d6, which serves as a protective or contact layer, and
[0024] 7 represents a conductor structure composed of the above four parts.
[0025] Here, the above parts can be built as follows:
[0026] - the metal substrate strip 3 is made of nickel, a nickel alloy or special steel, the thickness d3 of which is approximately 50 to 250 μm,
[0027] - at least one buffer layer or ...
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