Shielded Cable With Conductive Films For EMI And Durability
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Solution Overview
Problem
Existing cables external to metal enclosures lack effective shielding and structural integrity to prevent electromagnetic interference and physical damage, particularly in configurations with multiple subcable assemblies.
Innovation Solution
The cable design features multiple individual conductor sets with conductive shielding films on both sides, pinched portions for secure attachment, and an insulating core, allowing for flexible configuration and enhanced electromagnetic shielding and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If cables are jacketed in thick dielectric material to provide flammability and abrasion resistance, then physical durability is improved, but cable flexibility and ease of installation deteriorate
Solution Approach 1:
The cable is divided into multiple subcable assemblies (e.g., three subcables) that can be independently formed and assembled. This segmentation allows each subcable to maintain flexibility while the overall cable structure provides durability through the combined assembly and outer jacketing.
2Object-affected harmful factors
If cables are shielded in conductive metal foil or braid to contain electromagnetic fields, then electromagnetic shielding is improved, but cable flexibility and ease of installation deteriorate
Solution Approach 1:
The patent uses conductive shielding layers that are integrated as thin films within the cable structure rather than thick metal braids. This allows the shielding to be effective while maintaining cable flexibility and ease of installation, as the thin film shielding does not significantly increase stiffness or complexity.
3Adaptability or versatility
If multiple subcable assemblies are stacked to increase conductor capacity, then electrical functionality is improved, but structural integrity and electromagnetic interference protection deteriorate
Solution Approach 1:
Multiple subcable assemblies are merged into a single integrated cable structure with common outer jacketing and coordinated shielding. The subcables are positioned and secured within the outer jacket to maintain relative positions, ensuring structural integrity while preserving the electrical functionality of multiple conductors.
Solution Approach 2:
The cable structure employs a nested arrangement where individual insulated conductors are contained within subcable assemblies, which are in turn contained within the outer cable jacket. This nested structure provides structural integrity at each level while accommodating multiple conductors for enhanced electrical functionality.
4Adaptability or versatility
If multiple subcable assemblies are stacked to increase conductor capacity, then electrical functionality is improved, but electromagnetic interference between conductors worsens
Solution Approach 1:
Each subcable assembly within the multi-subcable cable has its own dedicated shielding layer positioned locally around that specific subcable. This local shielding quality ensures that electromagnetic fields from each subcable are contained independently, preventing interference between adjacent subcables while maintaining the overall electrical functionality of the multi-conductor cable.
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 design effectively contains electromagnetic fields and provides structural integrity, allowing for flexible cable configurations that enhance both electromagnetic shielding and physical durability.
Implementation Method 1
cables that include a plurality of separate individual conductor sets, each conductor set extending along a length of the cable. Each conductor set includes two or more insulated conductors and first and second conductive shielding films disposed on opposite first and second sides of the conductor set
Data Source
Figure 1~2
Figure 3
AI summary
Shielded cables (200) are described. More specifically, shielded cables (200) that include a plurality of separate individual conductor sets (210) are described. The individual conductor sets (210) include two or more insulated conductors, first and second conductive shielding films, and an insulating jacket surrounding the plurality of conductor sets. A variety of potential cable shapes and configurations are also described.