Testing experimental platform for performing disruptive discharge on insulation sample under low-temperature vacuum environment

Abstract

The invention discloses a testing experimental platform for performing disruptive discharge on an insulation sample under a low-temperature vacuum environment. The testing experimental platform mainly comprises a three-layered experimental Dewar type container and a high-voltage testing electrode system; the three-layered experimental Dewar type container comprises a vacuum testing container, a liquid helium (or liquid nitrogen), a cooling cylinder, and an outer vacuum insulation cylinder; the high-voltage testing electrode system is mainly composed of negative and positive electrodes, an insulating sample, upper and lower insulation supporting epoxy boards, polyimide insulating layer, a heat conducting copper supporting plate, and on the like. A cathode copper plate is used for connecting a low-potential lead and a leakage current testing lead; the leakage current testing lead is externally connected with the test system to strictly detect the disruptive discharge rule of the insulating sample. An anode copper plate is used for connecting a high-potential lead. The invention can realize the disruptive discharge performance test on various tested insulating samples under different low temperatures and vacuum degrees. According to the invention, the test temperature is ranged from 4.5 K to 300 K; and the air pressure test is ranged from 10-2 to 105 Pa.

Description

technical field [0001] The invention relates to the field of superconducting magnet devices, in particular to the design of an experimental platform for breakdown discharge testing of insulation samples in a low-temperature vacuum environment. Background technique [0002] With the application of superconducting technology, especially the development of large superconducting magnet device systems (such as hadron colliders, magnetic confinement fusion devices), and the continuous development of space and aerospace detection technology, the development of insulating materials under different pressure and low temperature conditions The safety and reliability of electrical performance has attracted more and more attention. [0003] The insulating layer of electrical components may have defects such as internal micro-cracks during processing, and it may cause physical damage such as cracking and aging when it is operated in a vacuum (or low pressure) and cryogenic environment for...

AI Technical Summary

Problems solved by technology

[0003] The insulating layer of electrical components may have internal micro-cracks and other defects during the processing process. If it is operated in a vacuum (or low pressure) and cryogenic environment for a long time, physical damage such as cracking and aging may occur; And in the case of superconducting magnet system magnet quenching, the energy of several megajoules needs to be released in a short time, and the ground voltage of the entire system will quickly climb to the order of 10,000 volts, resulting in insulation breakdown damage; in severe cases, the insulation If there are cracks and vacuum leaks, gas breakdown discharge accidents may occur, resulting in damage to the electrical components of the entire aerospace probe or the large superconducting system

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