Power Conductor with Porous Wire Cross-Sections for Noise Reduction
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Solution Overview
Problem
Conductors used in power transportation and distribution experience disruptive noise due to corona effects and electromagnetic fields, which is not adequately addressed by existing technologies, particularly in terms of minimizing noise generation at specific diameters and voltages.
Innovation Solution
A conductor design featuring an elongated core with a conductive casing constructed from layers of wires, where at least a fraction of the wires are shaped to fill only 50% to 90% of the cross-sectional area with wire material, incorporating protrusions to prevent wire slippage and maintain a cylindrical stack configuration, allowing for adjustable diameter to minimize electromagnetic field strength and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the conductor diameter is increased to reduce electromagnetic field strength and noise, then the noise reduction is achieved, but the conductor mass increases
Solution Approach 1:
The conductor uses wires with cross-sections that are not fully filled (50-90% filling ratio), creating a porous-like structure with voids between protrusions. This reduces the mass of the conductor while maintaining the outer diameter, thereby reducing electromagnetic field strength and noise without proportionally increasing mass
Solution Approach 2:
The conductor combines wires with different cross-sectional shapes (circular, triangular, rectangular, or custom shapes) in a composite structure. This allows optimization of space utilization and mass distribution, achieving reduced mass while maintaining structural integrity and noise reduction
2Stability of the object's composition
If wires are shaped with protrusions to prevent sliding and maintain cylindrical configuration, then structural stability is improved, but manufacturing complexity increases
Solution Approach 1:
The wire cross-section is segmented into a central portion and protruding portions, creating distinct functional zones. The central portion provides structural core while protrusions provide interlocking capability, allowing modular manufacturing approaches
Solution Approach 2:
The wire cross-section has different properties in different regions: the central portion has one geometry while the protrusions have different geometry. This local differentiation provides both structural stability through interlocking and manageable manufacturing by focusing complexity only where needed
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 design achieves a larger diameter conductor with reduced mass, minimizing noise and mechanical vibrations, while allowing for adaptability in diameter selection to prevent corona effects, thus enhancing the performance and efficiency of power transportation systems.
Implementation Method 1
The smaller the local radius, the stronger the electric field will be locally. Occasionally, the electric field is so strong that the air can be caused to ionise locally (Corona).
Implementation Method 2
disruptive noise, more specifically if a predominant low tone in the spectrum occurs, in this case 100Hz and harmonics thereof. Various analyses attribute the noise specifically to the behaviour of water droplets in this zone
Data Source
Figure 1
Figure 2(a)~2(e)
Figure 3
AI summary
A conductor for power transportation, the conductor comprising an elongated core constructed from a core material and an elongated conductive casing constructed from a conductive material, the elongated conductive casing being positioned around the elongated core and being constructed from various layers of wires, each layer of wires consisting of a set of wires which are positioned next to each other, and at least a fraction of these wires being shaped in such a way that for the cross section of the wire, a circumscribed circle is filled only with between 50% and 90% of wire material. The cross section of the wire has a central portion filled with wire and a plurality of protrusions. The shape of these wires is such that the space taken up by these wires in the stack of wires in the layers is substantially cylindrical.