Pyrotechnic Fuse With Explosion Chamber And Isolating Partition
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Solution Overview
Problem
High-voltage fuses face challenges in preventing or extinguishing arcs between separated electrical conductor parts, as existing solutions are complex and ineffective in suppressing arc development.
Innovation Solution
A fuse design featuring an explosion chamber and an isolating chamber with a pyrotechnic blasting charge, where the explosion separates the power lead into two parts, and an electrically insulating partition ensures the parts are isolated by a sufficient distance to prevent arc formation, potentially aided by an arc blow-out magnet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electrically insulating fluid (oil, gel, or gas) is added to extinguish arcs between separated power lead parts, then arc suppression is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent extracts the power lead from the housing in a controlled manner during fuse operation, separating it into isolated parts that are pulled apart by the housing movement itself, eliminating the need for complex arc suppression fluids or mechanisms
Solution Approach 2:
The housing acts as an intermediary mechanism that mechanically pulls the power lead apart and maintains separation, serving as a simple yet effective mediator that prevents arc formation without requiring additional insulating materials
2Productivity
If the power lead is mechanically separated to interrupt current flow, then fuse operation speed is improved, but arc formation between separated parts increases
Solution Approach 1:
The housing is pre-configured with guiding surfaces and engagement features that ensure the power lead is pulled apart in a controlled trajectory, preliminarily establishing the separation path before the actual fuse operation occurs
Solution Approach 2:
The patent converts the potentially harmful arc formation into a beneficial controlled separation process, where the mechanical pulling action that could cause arcing instead ensures clean isolation of conductive parts through predetermined housing geometry
3Reliability
If a complex arc suppression system is implemented, then arc extinguishing capability is improved, but manufacturing cost and device simplicity are worsened
Solution Approach 1:
The housing structure performs the arc suppression function itself through its own geometric features and movement characteristics, making the system self-sufficient without requiring additional manufactured components or materials for arc suppression
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 enables rapid and reliable tripping of high-voltage fuses, effectively preventing or extinguishing arcs without the need for insulating fluids, while maintaining a compact and cost-effective design, capable of handling high-current and high-voltage applications.
Implementation Method 1
an explosion is triggered in at least one explosion chamber so that the at least one power lead is separated into at least two parts
Implementation Method 2
the separated parts are separated from each other in a respective associated isolating chamber by a respective electrically insulating partition
Data Source
AI summary
Embodiments disclose a fuse comprising a one power lead, an explosion chamber and an isolating chamber, wherein the fuse is designed such that a power lead can be broken into at least two parts by an explosion triggered in an explosion chamber. The two parts are separated from each other in an associated isolating chamber by a respective electrically insulating partition. Embodiments disclose a method comprising a power lead, an explosion chamber and an isolating chamber, wherein an explosion is triggered in the explosion chamber so that the power lead is broken into at least two parts and bent into the isolating chamber such that at least two parts are separated from one another by an electrically insulating partition. The present disclosure can be applied to pyrotechnic fuses for vehicles and to high-voltage fuses.