Superconducting Current Lead Wire Angle Optimization
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Solution Overview
Problem
The critical current of Y-based high-temperature superconducting current leads decreases with the strength and angle of the applied magnetic field, and existing solutions either require multiple wires with increased stabilization layers, leading to significant heat penetration issues.
Innovation Solution
A superconducting current lead design featuring thin multi-layer rare-earth-based superconducting wires arranged at an angle of 40-60 degrees around a support rod, enhancing critical current performance while minimizing heat penetration through optimized stabilization and structural design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple Y-based high-temperature superconducting wires are arranged to increase critical current, then the critical current increases, but the total area of stabilization layers increases leading to significant heat penetration
Solution Approach 1:
The patent uses a composite structure combining Y-based high-temperature superconducting wires with a specific stabilization layer configuration. The key innovation is optimizing the stabilization layer to provide mechanical support and electrical stability while minimizing thermal conduction, thus resolving the contradiction between achieving high critical current and reducing heat penetration
Solution Approach 2:
The patent optimizes parameters including the arrangement angle of 40-60 degrees for the superconducting wires, the thickness and material composition of the stabilization layer, and the overall geometric configuration of the current lead. These parameter optimizations enable the system to achieve high critical current while minimizing heat penetration through the stabilization layers
2Ease of manufacture
If Bi-based high-temperature superconducting wire is used, then the current lead can be manufactured, but the critical current decreases due to large Ag coating layer area causing heat conduction
Solution Approach 1:
The patent changes the material parameter from Bi-based superconducting wire to Y-based superconducting wire, which has superior critical current characteristics. This material substitution resolves the contradiction by achieving both manufacturability and high critical current performance
Solution Approach 2:
The patent employs a composite structure with Y-based superconducting wires combined with an optimized stabilization layer system. This composite approach maintains ease of manufacture while significantly improving critical current performance compared to Bi-based wires with large Ag coating layers
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 arrangement of thin multi-layer rare-earth-based superconducting wires at 40-60 degrees around the support rod increases the critical current of the current lead, reducing heat penetration and maintaining high critical current characteristics across various magnetic field angles, thus improving the efficiency and reliability of the superconducting current lead.
Implementation Method 1
a superconducting current lead including thin multi-layer rare-earth-based superconducting wires
Implementation Method 2
A rod-shape support rod (5) having a regular octagonal cross-section is formed between a plate-like first electrode member (7) and a plate-like second electrode member (8)
Data Source
Figure 1
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AI summary
A superconducting current lead supplying current to a superconducting device includes a plurality of electrode members, a support rod that is arranged between the plurality of electrode members so as to connect the plurality of electrode members each other, and a plurality of thin multi-layer rare-earth-based superconducting wires, each of which has a tape shape and includes a main surface and both end portions being connected to each of the plurality of electrode members, and each of which is arranged on an outer surface of the support rod, wherein an angle θ is 40 - 60 degrees that is formed by each of the main surfaces adjacent to each other in a circumferential direction of the support rod on the outer surface of the support rod.