High-Temperature Superconducting Coil with MIT Insulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-temperature superconducting wires face challenges in electromagnetic characteristics and quench protection, with existing insulation methods affecting electromagnetic properties and making it difficult to detect and prevent quench phenomena effectively.
Innovation Solution
A high-temperature superconducting coil with a metal-insulator transition (MIT) material layer is used to insulate adjacent wires, which has a transition temperature higher than the critical temperature of the superconducting wire, allowing for increased electrical conductivity and providing self-protection against quench phenomena by acting as a bypass path during abnormal heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional insulating materials (Teflon or Kapton) are used to enclose the superconducting wire, then electrical insulation between adjacent wires is achieved, but electromagnetic characteristics and quench detection capability deteriorate
Solution Approach 1:
The patent applies parameter changes by using an insulating layer whose electrical conductivity changes with temperature. At normal operating temperatures, the layer maintains high insulation resistance. When a quench occurs and temperature rises, the insulation resistance decreases, allowing current to flow through the insulating layer, which enables quench detection while maintaining electrical insulation under normal conditions.
2Reliability
If the superconducting wire is insulated to prevent electrical contact, then wire protection is improved, but quench detection and protection capability deteriorates
Solution Approach 1:
The patent introduces an insulating layer as an intermediary between adjacent superconducting wires. This layer serves dual functions: providing electrical insulation under normal conditions and enabling quench detection when its resistance changes due to temperature increase during a quench event, thus acting as a mediator that protects the wire while enabling detection.
3Temperature
If high-temperature superconducting wire is used with high critical temperature, then operating temperature range is improved, but quench propagation speed decreases making detection difficult
Solution Approach 1:
The patent implements a feedback mechanism where the insulating layer's resistance change provides information about the quench event. When a quench occurs in the high-temperature superconducting wire, the temperature increase causes the insulating layer's resistance to decrease, providing detectable feedback signals that enable monitoring and protection systems to respond to the quench event despite the slow propagation speed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The MIT material layer enhances the electromagnetic characteristics of the coil, enabling rapid response to current changes and providing effective self-protection against quench events, improving the stability and detection of quench phenomena in high-temperature superconducting magnets.
Implementation Method 1
a metal-insulator transition (MIT) material layer interposed so as to electrically insulate the space between superconducting portions of the adjacent superconducting wires
Implementation Method 2
a high-temperature superconducting wire operating at a liquefied nitrogen temperature exhibits a high threshold current density characteristic at a high magnetic field
Data Source
AI summary
The present invention relates to a superconducting coil having a structure in which an insulation layer electrically insulates the space between adjacent wound wires. The present invention provides a superconducting coil in which superconducting wires extended at a predetermined width in a lengthwise direction are stacked and wound, the superconducting coil comprising a metal-insulator transition (MIT) material layer interposed so as to electrically insulate space between adjacent superconducting wires in the stacking direction of the superconducting wires. According to the present invention, provided is a superconducting coil having high stability, and easily controlling electromagnetic properties including response properties and having a self-protective function against a quench phenomenon and the like during the driving of a magnet.