Conductive Member Grounding for Shielded Wire EMC
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Solution Overview
Problem
Electrical devices face challenges in effectively grounding shielded electric wires, leading to uncontrolled electromagnetic wave radiation due to gaps between the wire and the ground portion, which compromises Electromagnetic Compatibility (EMC) and Susceptibility (EMS) measures.
Innovation Solution
A conductive member is arranged between two attachment members to contact and ground an electric wire, ensuring reliable grounding and suppression of electromagnetic waves, using conductive gaskets or tapes to maintain contact and cushioning characteristics for flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If two attachment members are used to attach the electric wire to the ground portion, then the electric wire can be fixed, but the distance between the ground portion and the electric wire increases depending on the wire shape, causing electrical separation
Solution Approach 1:
A conductive member is introduced as an intermediary between the electric wire and the ground portion. This conductive member maintains electrical contact with both the wire and the ground, ensuring reliable grounding even when the wire shape causes separation from the ground portion. The conductive member acts as a mediator that bridges the gap created by wire deformation.
Solution Approach 2:
The solution changes the electrical contact parameter by introducing a conductive member that can adapt to wire shape variations. Instead of relying on direct rigid contact between the wire and ground portion, the conductive member allows the system to maintain electrical contact despite changes in wire geometry caused by attachment forces.
2Object-affected harmful factors
If the electric wire is shielded with a metal shield, then electromagnetic radiation noise is blocked, but the shield portion must be reliably grounded to prevent current from generating electric or magnetic fields
Solution Approach 1:
The conductive member serves as an intermediary that ensures reliable grounding of the shield portion. It maintains continuous electrical contact between the shield and the ground portion, preventing current accumulation that would otherwise generate electromagnetic fields. This mediator ensures the shielding function remains effective.
3Reliability
If the electric wire is pressed and fixed on the GND sheet metal, then grounding is achieved, but the wire may separate from the ground portion due to wire shape variations
Solution Approach 1:
The conductive member acts as a stable intermediary that maintains continuous electrical contact between the electric wire and the ground portion. It compensates for wire shape variations and movement, ensuring stable grounding contact without requiring the wire itself to maintain direct contact with the ground sheet metal.
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 solution effectively suppresses electromagnetic waves and maintains EMC and EMS standards even in constrained grounding spaces and wire shapes, ensuring stable performance for both high- and low-impedance signals.
Implementation Method 1
a conductive member arranged to contact an electric wire attached to a ground portion by a first attachment member and a second attachment member, and the ground portion, and arranged between the first attachment member and the second attachment member
Data Source
AI summary
The present disclosure relates to an electrical device, and a method for arranging a conductive member. A conductive member is arranged to contact the ground portion electrically grounded and the electric wire attached to the ground portion by a first attachment member and a second attachment member. The conductive member is arranged between the first attachment member and the second attachment member.