Auto-Disconnect Apparatus Prevents Connector Arcing
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Solution Overview
Problem
Emergency vehicles and similar equipment face significant wear on power connectors due to arcing when quickly disconnecting from power lines, reducing the service life of these components.
Innovation Solution
A power line auto-disconnect apparatus with a sealed housing, an electrical connector, an ejector pin, a microswitch, and a sensor pin that controls the microswitch to prevent arcing by interrupting current flow before plug ejection, ensuring the plug is ejected without arcing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the power line plug is ejected quickly when the vehicle needs to be driven away, then the response time is improved, but arcing occurs between the plug and vehicle connector causing wear
Solution Approach 1:
The microswitch is configured to interrupt the power circuit before the ejector pin physically separates the plug from the connector. This preliminary action of cutting power precedes the mechanical ejection, ensuring that no arcing occurs during the quick disconnection process, thus maintaining both fast response and connector reliability
2Ease of operation
If the plug is ejected manually or without automation, then the device complexity is reduced, but the ease of operation during emergencies is worsened
Solution Approach 1:
The system uses the vehicle's own engine activation signal to automatically trigger the ejection sequence. When the engine is started, this automatically activates the microswitch to cut power and the ejector pin to discharge the plug, making the system self-activating without requiring separate controls or complex automation mechanisms
3Device complexity
If arcing is allowed during disconnection, then the ejection process is simpler, but wear on contacts increases significantly
Solution Approach 1:
The microswitch acts as an intermediary between the ejection mechanism and the power circuit. It mediates the transition by interrupting the electrical connection before the mechanical separation occurs, eliminating arcing while keeping the ejection mechanism itself relatively simple and direct
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 effectively prevents arcing during disconnection, thereby extending the life of the connectors and ensuring safe and reliable power disengagement.
Implementation Method 1
Arcing, if not suppressed, is a major source of wear on contacts in both the vehicle connector and the plug
Data Source
AI summary
A power line disconnect apparatus includes a housing; an electrical connector that projects from a surface of a connector plate coupled to the housing, the electrical connector configured to receive a plug of a power cable; an ejector pin configured to project through a first aperture in the connector plate and eject the plug from the electrical connector; a microswitch configured to activate and deactivate a power circuit associated with the power cable; and a sensor pin configured to project through a second aperture in the connector plate, the sensor pin having a sensor pin extension, the sensor pin extension configured to control the microswitch.