PoE Connector Switching to Prevent Contact Arcing
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Solution Overview
Problem
Current PoE standards lack a protocol to safely de-energize the electrical path upon disengagement of contacts, leading to brief electric discharges and arc formation that damage the contacts.
Innovation Solution
Incorporation of a switching component, such as a micro-switch or pressure switch, that de-energizes the electrical path before the plug disconnects from the jack, preventing arcing by moving to an open state in response to relative movement between the plug and jack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PoE power transmission is implemented without a de-energizing protocol, then power delivery functionality is achieved, but contact damage occurs due to arcing during disengagement
Solution Approach 1:
The switching component is configured to de-energize the electrical path before the plug and jack are fully disengaged. This preliminary action of cutting power before physical separation prevents the harmful arc from forming at the contact points, thereby protecting the contacts from damage while maintaining reliable PoE functionality.
2Reliability
If a switching component is added to de-energize the path before disengagement, then contact damage is prevented, but device complexity increases
Solution Approach 1:
A switching component is introduced as an intermediary element between the power source and the PoE path. This switch acts as a mediator that controls the flow of power, enabling safe disengagement by cutting power before the plug and jack separate. The switching component can be implemented using existing switch technology integrated into the connector design.
Data Source
AI summary
An arc prevention system including a jack having a receptacle, with the receptacle having an upper wall, a bottom wall, two opposing side walls and a back wall between the two opposing side walls, a sensor unit positioned on the back wall of the receptacle, where the sensor unit is positioned on the back wall of the receptacle such that the sensor unit engages a plug inserted into the receptacle.