Arc-Mitigating Fuse Using Quantum Tunneling Compound
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Solution Overview
Problem
Fuses can experience electrical arcing after the fusible element melts during an overcurrent condition, allowing follow-on currents that can damage protected components.
Innovation Solution
An arc-mitigating fuse design that includes a tubular fuse body, endcaps, a fusible element, and an arc-mitigating element made of quantum tunneling compound (QTC) held in compression, which expands to increase electrical resistance and prevent arcing when the fusible element separates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional fuse design is used, then the fusible element can interrupt current flow, but electrical arcing occurs between separated portions allowing follow-on currents to damage protected components
Solution Approach 1:
An arc-mitigating element is introduced as an intermediary component between the fusible element and the circuit. This element serves as a mediator that absorbs and quenches electrical arcs through its dielectric properties, preventing arc propagation while allowing the fusible element to perform its primary current-interrupting function.
Solution Approach 2:
The arc-mitigating element is pre-positioned and pre-configured within the fuse body to provide immediate arc suppression capability. The element is held in a compressed state during normal operation, ready to rapidly expand and absorb arc energy the moment the fusible element separates, cushioning against the harmful effects before they can propagate.
2Productivity
If the fusible element is designed to melt and separate to interrupt current, then overcurrent protection is achieved, but arc propagation between separated portions occurs
Solution Approach 1:
The arc-mitigating element utilizes the energy from the electrical arc itself to achieve beneficial results. By absorbing and dissipating arc energy through its dielectric properties and controlled breakdown characteristics, the element converts the harmful arc into a controlled phenomenon that ultimately enhances the fuse's protective capability rather than merely suppressing it.
3Ease of manufacture
If a simple fuse design is used, then manufacturing is straightforward, but arc mitigation capability is lacking
Solution Approach 1:
The arc-mitigating element is nested within the existing fuse body structure, utilizing the available internal space efficiently. This nested configuration allows the addition of arc suppression functionality without significantly increasing the overall fuse size or complicating the manufacturing process, as the element integrates seamlessly into the existing assembly workflow.
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 arc-mitigating element effectively mitigates electrical arcing by increasing resistance to zero the flow of current, preventing damage to connected components.
Implementation Method 1
an arc-mitigating element made of quantum tunneling compound (QTC) held in compression, which expands to increase electrical resistance and prevent arcing
Data Source
AI summary
An arc-mitigating fuse including a tubular fuse body, a first endcap covering a first end of the fuse body and a second endcap covering a second end of the fuse body, a fusible element disposed within the fuse body and extending between the first endcap and the second endcap to provide an electrically conductive pathway therebetween, and an arc-mitigating element disposed within the fuse body and held in a compressed state between the first endcap and the second endcap, the arc-mitigating element adapted to extend to an uncompressed state upon separation of the fusible element.