High-temperature superconductive closing coil constant-current switch structure and work method thereof

Abstract

The invention provides a high-temperature superconductive closing coil constant-current switch structure and a work method thereof. The high-temperature superconductive closing coil constant-current switch structure comprises a switch body and a lead, and the switch body is connected with a closing coil to form a closed circuit. The lead is connected with the switch body and an exciting current source. Compared with the prior art, the high-temperature superconductive closing coil constant-current switch structure has the advantages that the size and weight of the superconductive closing coil can be reduced, the aim of compaction and weight reduction is achieved, and the high-temperature superconductive closing coil constant-current switch structure is especially suitable for magnetically levitated trains or aircrafts or other occasions with strict requirements on the size and weight; a switch-off resistor of the switch is dynamically changing, heating and exciting can be balanced well,successful exciting is achieved, and meanwhile the heat load of a refrigerating system is reduced to the minimum; turning off of the switch does not need to be controlled by other additional equipment, and therefore external equipment does not need to be driven by additional energy to work. Therefore, the energy input need of a whole closing superconductive coil system can be reduced, and the high-temperature superconductive closing coil constant-current switch structure is more suitable for being used on mobile devices.

Description

technical field [0001] The invention relates to a high-temperature superconducting closed-coil constant-current switch structure and a working method thereof which are directly switched off by the over-current control of an excitation current source. Background technique [0002] (1) Characteristics of high temperature superconductors [0003] In 1908, Kamerlingh Onnes, a professor at the University of Leiden in the Netherlands, successfully liquefied helium (He) after many experiments, which also marked that the lowest temperature available to humans has reached 4.2K. Three years later, Professor Onnes discovered that the resistance of mercury (Hg) suddenly dropped to zero at the temperature of liquid nitrogen. This marks that the superconducting phenomenon and superconducting technology have entered the history of human scientific research. Subsequently, Professor Onnes conducted follow-up experiments and confirmed that at a temperature of 4.2K, the resistivity of mercur...

AI Technical Summary

Problems solved by technology

At present, whether it is a thermal control, magnetic control or flow control superconducting constant current switch, it needs additional auxiliary equipment to help it realize switching off and on, such as heating wire, magnetic field generating device or external current source, so that the superconducting closed coil The structure of the superconducting closed coil is complicated, and the volume and weight are increased at the same time, which makes it difficult to highlight the advantages of the original light weight and compactness of the superconducting closed coil

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