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Superconductor current lead

A technology of current leads and superconducting coils, applied in superconducting magnets/coils, superconducting/high-conducting conductors, circuits, etc., can solve problems such as failure of cryogenic refrigerators and quenching of HTS conductors

Pending Publication Date: 2020-09-29
SIEMENS HEALTHCARE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While this may contribute to some quenching of the HTS conductors so that current may divert from the quenched HTS conductor into parallel HTS conductors, this will not address the most common failure mode - failure of cryocoolers, This causes a quench at the higher temperature portion 12 of the HTS conductor

Method used

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  • Superconductor current lead
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Embodiment Construction

[0034] The present invention improves upon the conventional current lead arrangements described above by providing a simple and reliable method of passive protection.

[0035] The current lead device of the present invention, such as figure 2 Illustrated at 40 in , passive protection is provided for the HTS conductor. In the event that an HTS conductor is fully or partially quenched while carrying current, a voltage is developed across the quenched portion of the HTS conductor. This voltage will appear at the voltage taps 30,32. According to a feature of the invention, this voltage is applied to quench heater 34 in thermal contact with superconducting device 26 . In certain embodiments, a plurality of quench heaters 34 are provided, at least one quench heater being in contact with each of the plurality of superconducting coils.

[0036] The voltage developed on the HTS conductor 11 between the voltage taps 30 , 32 is applied to the quench heater(s) 34 . This causes curren...

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PUM

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Abstract

The embodiment of the invention relates to a superconductor current lead. The current lead (40) is used for supplying a current to a superconducting device (26), and the current lead comprises an HTSconductor (11) extending along the length of the current lead. The HTS conductor is thermally and electrically connected to the electrical shunt (21), a respective voltage tap (30, 32) is connected toa respective end of the HTS conductor for connection to a quench heater (34) in thermal contact with the superconducting device (26). Quenching in the HTS conductor (11) will cause a voltage to occurbetween the voltage taps, and the voltage is applied to the quench heater to cause quench within the superconducting device.

Description

technical field [0001] The present invention relates to current leads for superconducting devices. In an example setup, a superconducting device, such as a cylindrical magnet, is cooled to a temperature below the transition temperature of the superconducting material used. In some conventional setups, superconducting devices are cooled to the temperature of boiling helium, about 4K. Background technique [0002] Current leads must be provided to enable current to be introduced into and removed from the superconducting device. These current leads will extend from a region at ambient temperature (eg 300K) to a region at the temperature of the superconducting device (eg 4K). It is important that the current wire carry as little heat as possible from a region at ambient temperature to a region at superconducting device temperature and that ohmic heating in the current wire is as low as possible. These are competing requirements. For low heat conduction, the current leads are...

Claims

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Application Information

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IPC IPC(8): H01F6/06
CPCH01F6/065H01F6/02H01R4/68H01B12/02H01F6/04H01F6/06H01B12/00
Inventor S·乔利M·辛普金斯
Owner SIEMENS HEALTHCARE GMBH