Shielding Termination Assembly for Flexible EMI Power Feeders
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Solution Overview
Problem
Conventional electrical shielding termination systems face challenges in installation due to large bend radius issues with high amperage power feeders, particularly in vehicle applications, where effective shielding for electromagnetic interference (EMI) requires a complete circumference connection that is difficult to achieve without increasing vehicle weight.
Innovation Solution
A conductor shielding termination assembly featuring a conductive housing tube with a shoulder bushing and clamping assembly that axially locks the housing tube and conductor, trapping a shielding termination between them, allowing for a secure and flexible connection that prevents axial movement and provides stress relief.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If shielding is done at the harness bundle level, then EMI protection is provided, 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 and harness bundle shielding. This segmentation allows the bundle itself to remain flexible with smaller bend radius while still providing EMI protection through the individual conductor shields that can be independently managed and terminated.
2Object-affected harmful factors
If shielding is done for individual phases of feeder power, 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 the entire harness bundle. This local quality approach provides EMI protection only where needed, reducing the overall weight of the shielding system while maintaining effectiveness for high amperage power feeders.
3Reliability
If conventional clamping methods are used, then shielding termination is achieved, but repairability is limited
Solution Approach 1:
The patent employs a dynamic clamping system with adjustable clamping force and removable clamps that allow for both secure shielding termination and easy repair. The clamping mechanism can be tightened to ensure reliable electrical connection while also being designed for removal and reinstallation, providing both termination reliability and repairability.
Data Source
Figure 1A~1B
Figure 2~3
Figure 4A~4B
AI summary
A conductor shielding termination assembly (100;700) can include a housing tube (101;701) defining an inner diameter housing channel (101a;701a) therethrough. The housing tube can be made of conductive material. The assembly can include a shoulder bushing (103;703) configured to insert within the inner diameter housing channel of the housing tube. The shoulder bushing can define an inner diameter bushing channel (103a;703a) sized to receive an unshielded portion (105a) of a conductor (105). The assembly can include a clamping assembly (707) 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 (109) between the housing tube and the clamping assembly. The clamping assembly can form a clamping inner diameter channel sized to receive a shielded portion (105b) of the conductor.