Copper-Steel Ground Conductor Structure With Reduced Copper Use
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Solution Overview
Problem
Traditional ground conductors made almost entirely of copper are expensive, vulnerable to theft, and have a limited lifetime due to high copper consumption and corrosion, failing to meet the demands for longer service life and reduced material usage.
Innovation Solution
A ground conductor design featuring a core made of at least 95% steel and a sheath of at least 95% copper, with a width-to-thickness ratio of at least 11.1:1, where the copper sheath is diffusion-bonded to the steel core, allowing for reduced copper usage while maintaining electro-thermal capacity and mechanical ruggedness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional ground conductors are made almost entirely of copper, then excellent conductivity and durability are achieved, but high cost and vulnerability to theft occur
Solution Approach 1:
The patent applies composite materials by combining copper and steel in a diffusion-bonded structure. The copper provides excellent electrical conductivity and corrosion resistance, while the steel provides mechanical strength and structural integrity. This composite approach reduces overall copper content while maintaining the functional requirements for ground conductor performance.
Solution Approach 2:
The patent applies local quality by creating a diffusion-bonded interface where copper and steel materials are integrated at the molecular level. This localized bonding creates a transition zone that optimizes both electrical conductivity (from copper) and mechanical strength (from steel) in different regions of the conductor, allowing reduced copper content while maintaining overall performance.
2Use of energy by moving object
If traditional ground conductors use high copper content, then good electro-thermal capacity is maintained, but lifetime is limited due to corrosion and theft vulnerability
Solution Approach 1:
The diffusion-bonded copper-steel composite extends service lifetime by combining copper's corrosion resistance with steel's structural durability. The steel core provides long-term mechanical integrity while the copper layers maintain electro-thermal capacity, creating a conductor that resists both corrosion and theft over extended periods.
Solution Approach 2:
The localized diffusion-bonded interface creates optimal material distribution where copper concentrates electro-thermal properties at the surface and interface regions, while steel provides bulk structural support for long-term durability. This local optimization maintains performance while extending service life.
3Quantity of substance
If copper content is reduced to lower cost and theft risk, then electro-thermal capacity may deteriorate, but mechanical ruggedness must be maintained
Solution Approach 1:
The diffusion-bonded composite structure ensures that reduced copper content does not deteriorate electro-thermal capacity because the copper is strategically positioned at the surface and bonding interface where it provides maximum conductivity benefit. The steel core compensates for reduced copper volume by providing structural integrity and heat dissipation pathways.
Solution Approach 2:
The diffusion-bonded interface creates a localized region of optimized material properties where copper and steel are integrated at the molecular level. This local quality enhancement ensures that even with reduced overall copper content, the electro-thermal capacity is maintained through concentrated copper distribution at critical interfaces.
4Quantity of substance
If diffusion-bonded copper-steel structure is used, then copper usage is reduced and lifetime is extended, but manufacturing complexity increases
Solution Approach 1:
The diffusion-bonded composite manufacturing process, while more complex than traditional copper drawing, achieves copper reduction and lifetime extension through a controlled metallurgical bonding process. This single-step diffusion bonding simultaneously creates the composite structure and the molecular-level interface, consolidating multiple functions into one manufacturing operation.
Solution Approach 2:
The diffusion-bonding process utilizes controlled parameter changes (temperature, pressure, time) to create the copper-steel composite structure. By controlling these parameters, the manufacturing process achieves reliable bonding while maintaining reproducibility and quality control, balancing the increased process complexity with consistent product performance.
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 new design significantly reduces copper content by up to 54% while maintaining or improving electro-thermal capacity, resistance to ground, and break load, making it less attractive to thieves and extending the conductor's lifetime.
Implementation Method 1
a sheath of at least 95% copper, with a width-to-thickness ratio of at least 11.1:1, where the copper sheath is diffusion-bonded to the steel core
Data Source
AI summary
Ground conductors are disclosed. The ground conductors can include a core made primarily of a first material, such as steel. The ground conductor can include a surrounding sheath, which includes at least one layer made primarily of a second material, such as copper. The ground conductor has a ratio between its width and its thickness of no less than 11.1:1.