Shielding Termination Assembly for Full-Circumference EMI Clamping
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Solution Overview
Problem
Existing electrical shielding termination systems face challenges in installation due to large bend radii and weight considerations, particularly for large gauge power feeders, and often fail to provide a complete circumference connection for effective electromagnetic interference (EMI) protection.
Innovation Solution
A conductor shielding termination assembly that includes a conductive housing tube with a shoulder bushing and a clamping assembly, which axially locks the housing tube and conductor, trapping a shielding termination between them. The clamping assembly compresses against the shielded conductor, ensuring a secure and complete circumference connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If shielding is done at the harness bundle level for EMI protection, then EMI shielding effectiveness is improved, but the bundle bend radius becomes too large to facilitate installation
Solution Approach 1:
The patent divides the shielding structure into separate components: individual conductor shielding rather than bundle-level shielding. This segmentation allows each conductor to be shielded independently with smaller bend radii, facilitating installation while maintaining EMI protection effectiveness for each individual conductor.
2Object-affected harmful factors
If shielding is done for individual phases of high amperage power feeders, then EMI protection is improved, but vehicle weight increases
Solution Approach 1:
The patent applies shielding selectively to individual conductors or phases that require EMI protection rather than shielding entire harness bundles. This local quality approach ensures EMI protection is provided only where necessary, reducing overall weight while maintaining protection for critical high amperage power feeders.
3Reliability
If conventional clamping methods are used for shielding termination, then electrical connection is achieved, but complete circumference connection for effective EMI protection is not ensured
Solution Approach 1:
The patent employs a two-stage clamping process: first a initial clamping to establish electrical connection, then a second compression stage that ensures complete circumference contact. This sequential action transitions the connection from basic electrical contact to complete circumferential engagement, ensuring both electrical connectivity and EMI shielding effectiveness.
Solution Approach 2:
The clamping assembly incorporates dynamic adjustment capabilities that allow the compression force to be applied progressively and uniformly around the circumference. This dynamic clamping mechanism ensures complete contact between the shielding termination and the conductor, achieving both reliable electrical connection and effective EMI protection.
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 solution enables efficient installation of electrical shielding termination systems by reducing the bend radius and weight concerns, while ensuring a complete circumference connection for effective EMI protection, thereby improving the overall performance and reliability of the shielding.
Implementation Method 1
The housing tube can include one or more housing lock features on an outer diameter thereof configured to prevent axial movement of the clamping assembly relative to the housing tube
Implementation Method 2
The housing lock features and the one or more clamp lock features can be configured to mate with each other to axially lock the clamping assembly to the housing tube
Implementation Method 3
The housing tube can be made of conductive material. The clamping assembly is conductive
Data Source
AI summary
A conductor shielding termination assembly can include a housing tube defining an inner diameter housing channel therethrough. The housing tube can be made of conductive material. The assembly can include a shoulder bushing configured to insert within the inner diameter housing channel of the housing tube. The shoulder bushing can define an inner diameter bushing channel sized to receive an unshielded portion of a conductor. The assembly can include a clamping assembly configured to clamp around the housing tube and/or the conductor to axially lock the housing tube and the conductor and to trap a shielding termination between the housing tube and the clamping assembly. The clamping assembly can form a clamping inner diameter channel sized to receive a shielded portion of the conductor.