Capacitive Cable with Woven Conductors for High-Frequency Power Transmission
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Solution Overview
Problem
Capacitive cables experience high resistance and voltage losses when transmitting power at high frequencies, leading to inefficiency and potential health hazards from large electric and magnetic fields.
Innovation Solution
A capacitive cable design with reduced resistance and reactance, achieved by weaving or winding conductors into bundles to minimize skin and proximity effects, using dielectric materials, and integrating conductors as both transmission and return lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If capacitive cables are used to transmit power at high frequencies, then power transmission capability is improved, but voltage losses and resistance increase significantly
Solution Approach 1:
The cable is divided into multiple individually insulated conductors (at least two conductors) arranged in parallel, with dielectric material positioned between them. This segmentation allows each conductor to carry a portion of the current, reducing the skin effect and proximity effect that cause high resistance at high frequencies, thereby reducing voltage losses while maintaining power transmission capability.
Solution Approach 2:
Dielectric material is positioned locally between specific conductors to create controlled capacitance relationships. This local arrangement optimizes the electric field distribution between conductors, reducing energy losses while maintaining the capacitive power transmission function at high frequencies.
2Use of energy by moving object
If capacitive cables with high capacitance are used, then low frequency power transmission efficiency is improved, but high frequency transmission losses increase
Solution Approach 1:
The cable design changes the effective capacitance parameter by arranging multiple conductors with specific dielectric positioning. This creates a distributed capacitance structure that maintains efficient power transmission at low frequencies while reducing the harmful effects of high capacitance at high frequencies, effectively adapting the cable's electrical characteristics to different frequency ranges.
3Ease of manufacture
If conventional cable structures are used, then manufacturing simplicity is maintained, but resistance and voltage losses increase at high frequencies
Solution Approach 1:
The cable uses multiple individually insulated conductors that can be manufactured separately and then assembled into the final cable structure. This segmentation approach maintains manufacturing simplicity while enabling the conductors to be arranged in configurations that minimize skin and proximity effects, thereby reducing high frequency voltage losses.
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 efficiently transmits power at high frequencies with minimal voltage losses, improved balance between lines, and reduced hazardous fields, enhancing safety and efficiency.
Implementation Method 1
capacitive cables for transmitting power between a power source and a load are also known and are described in, for example, EP 3996114
Implementation Method 2
achieved by weaving or winding conductors into bundles to minimize skin and proximity effects
Implementation Method 3
achieved by weaving or winding conductors into bundles to minimize skin and proximity effects
Data Source
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AI summary
A capacitive cable comprises: (a) a first plurality of conductors for connection to a power source, (b) a second plurality of conductors for connection to a load, and (c) a dielectric material between the first plurality of conductors and the second plurality of conductors, wherein each conductor is individually insulated, and wherein at least one of the conductors of the first plurality of conductors and at least one of the conductors of the second plurality of conductors are woven or wound into one or more bundles such that each individual conductor repeatedly transitions, along a length of the one or more bundles, between an outside of the one or more bundles and an inside of the one or more bundles. The capacitive cable can be used as both a transmission line and a return line.