Coaxial Superconducting Cable Wire Distribution Optimization
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Solution Overview
Problem
Existing three-phase coaxial superconducting power cables suffer from waste of superconducting wires due to differing critical currents in each phase, leading to inefficiencies and increased material costs.
Innovation Solution
The cable design includes forming spaces between superconducting layers and inserting wires with varying critical currents, optimizing the distribution of superconducting wires to equalize critical currents across phases, and replacing the copper shield layer with an aluminum cryo-chamber to reduce material waste and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If superconducting wires with different critical currents are used in each phase to match circumference requirements, then the cable can accommodate different phase currents, but waste of superconducting wires occurs in outer layers and critical currents become unbalanced
Solution Approach 1:
The patent applies local quality by placing superconducting wires with different critical currents in different radial positions (inner vs outer layers) based on their specific current requirements. Each layer is optimized locally with appropriate wire specifications rather than using uniform wires throughout, thereby eliminating waste while maintaining adaptability to different phase currents.
Solution Approach 2:
The patent changes the parameter of critical current across different wire positions systematically. By varying the critical current parameter of superconducting wires from inner to outer layers, the design optimizes current distribution and eliminates waste in outer layers while maintaining overall system adaptability.
2Object-affected harmful factors
If a copper shield layer is used to surround all three phases, then electromagnetic shielding is provided, but material cost and device complexity increase
Solution Approach 1:
The patent merges the shield layer with the outermost superconducting layer by forming the shield directly on the outer surface of the superconducting wires in the outer layer. This integration eliminates the need for a separate copper shield layer, reducing material cost and structural complexity while maintaining electromagnetic shielding functionality.
Solution Approach 2:
The outermost superconducting layer serves dual functions: carrying phase current and providing electromagnetic shielding. By making the shield layer an integral part of the superconducting structure, the design achieves multi-functionality, reducing overall cable complexity and material requirements.
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
This approach reduces wire waste, standardizes critical currents across phases, and lowers manufacturing costs by optimizing wire distribution and eliminating unnecessary copper components, enhancing efficiency and compactness.
Implementation Method 1
When an input current is lower than a critical current, the superconducting wire shows a superconducting characteristic in which a resistance is 0
Data Source
AI summary
Provided are a three-phase coaxial superconducting power cable and a structure thereof. A certain space is formed between adjacent superconducting wires of a superconducting layer (disposed at an outer portion) having more superconducting wires among a plurality of superconducting layers, and another wire is disposed in the space, or the superconducting wires of the respective superconducting layers are disposed to have different critical currents. Accordingly, a waste of superconducting wires is prevented, and the optimized three-phase coaxial superconducting power cable is provided.