Capacitive Power Cable With Opposite Twist Strands
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Solution Overview
Problem
Existing capacitive power transmission cables face inefficiencies due to the requirement for loop formation and limitations in insulation and conductor configurations, which affect their ability to transmit power with minimal loss over long distances.
Innovation Solution
A capacitive power transmission cable design featuring at least two sets of conductive strands with insulation coatings, arranged in layers of opposite twist and alternated in their layers, to establish a capacitive relationship between the strands, allowing for efficient power transmission with reduced conductor material usage and enhanced capacitance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If loop formation is implemented in capacitive cable, then power transmission with zero loss is achieved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent extracts and eliminates the loop formation requirement from the capacitive cable design. Instead of forming closed loops with conductive layers, the invention uses simple linear arrangements of conductive strands with insulation, removing the complex folding and closing operations while maintaining the capacitive power transmission function.
Solution Approach 2:
The patent segments the cable into multiple independent conductive strands rather than requiring continuous conductive layers to form loops. Each strand is insulated and arranged in a linear sequence, allowing the system to achieve capacitive transmission without the need for closed-loop configurations.
2Ease of manufacture
If conventional insulation and conductor configurations are used, then manufacturing is simplified, but power transmission efficiency and capacitance are reduced
Solution Approach 1:
The patent employs composite construction with multiple materials: conductive strands (copper or aluminum), insulating coatings (polymer or enamel), and dielectric materials positioned between conductive elements. This composite approach enables both efficient power transmission through optimized capacitance and straightforward manufacturing using conventional materials and processes.
Solution Approach 2:
The patent optimizes transmission efficiency by changing key parameters: increasing capacitance through strategic placement of dielectric materials between conductive strands, selecting appropriate conductor materials and configurations, and adjusting insulation thickness and type to balance electrical performance with manufacturability.
3Power
If capacitance is increased to neutralize inductive reactance, then power limit is improved, but conductor material and cable complexity increase
Solution Approach 1:
The patent applies local quality by positioning dielectric materials specifically between adjacent conductive strands at intervals along the cable length, rather than requiring uniform high-capacitance construction throughout. This localized approach to increasing capacitance allows the system to neutralize inductive reactance and improve power transmission limits while using less conductor material overall.
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 cable achieves efficient power transmission with low to zero loss over long distances by optimizing capacitance and conductor configuration, balancing inductive reactance, and reducing the need for loop formation, while allowing for flexible connection options through specialized connectors.
Implementation Method 1
a capacitive power transmission cable comprising at least two sets of conductive strands, the sets of strands being insulated from each other and in capacitive relationship, the one with the other
Implementation Method 2
all of the strands of at least one of the sets having: a respective insulation coating of a dielectric strength to enable the sets of conductive strands to remain isolated
Data Source
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AI summary
A capacitive power transmission cable comprises: (a) at least two sets of conductive strands, the conductive strands being (i) laid in layers of opposite twist, with (ii) the strands of one or more adjacent layers being of all one set and then radially outwards the strands of one or more adjacent layers being of all another set, and (b) insulation between the layers of different sets, whereby the at least two sets are in capacitive relation to each other.