Magnet-Cased Arc Extinguishing Unit for Compact Arc Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing arc extinguishing devices for air circuit breakers are limited in effectively extinguishing arcs without damaging magnets and do not efficiently form an arc path, especially when using air as a medium, and require excessive design changes or increased space for magnetic field formation.
Innovation Solution
An arc extinguishing unit with a magnetic field formed by multiple support plates, a grid, and accommodated magnets that create a magnetic field between the plates, allowing the arc to be quickly extinguished and moved externally without damaging the magnets, and without significant design changes or increased space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a magnet is provided to form a magnetic field for arc movement, then arc extinguishing performance is improved, but the magnet may be damaged by the arc
Solution Approach 1:
The patent introduces a magnetic field as an intermediary substance between the arc and the magnet. The magnetic field guides the arc movement without direct contact between the arc and magnet, preventing damage while maintaining arc control. The magnet generates the magnetic field but remains isolated from the arc's harmful effects.
2Reliability
If design changes are made to accommodate magnets for magnetic field formation, then arc path control is improved, but device complexity increases
Solution Approach 1:
The patent makes the magnet serve multiple functions: it provides structural support as a mounting component while simultaneously generating the magnetic field for arc control. This multi-functionality reduces the need for separate components and minimizes design changes.
Solution Approach 2:
The patent combines the magnetic field generation function with existing structural components of the circuit breaker. The magnet is integrated into the arc extinguishing unit structure, merging the magnetic control function with the mechanical framework.
3Reliability
If magnets are added for magnetic field formation, then arc extinguishing capability is improved, but occupied space increases
Solution Approach 1:
The patent places the magnet inside the arc extinguishing unit structure, nesting it within the existing spatial framework. The magnet is positioned within the arc chamber volume, utilizing existing space rather than adding external components.
Solution Approach 2:
The patent uses a thin magnetic field to achieve arc control without requiring bulky physical structures. The magnetic field penetrates through the arc path with minimal spatial occupation, providing effective control in a compact form.
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 extinguishes and moves arcs, prevents magnet damage, and maintains a compact design, ensuring efficient arc path formation and safe operation.
Implementation Method 1
an extinguishing magnet that is accommodated in the magnet case, wherein the extinguishing magnet forms a magnetic field between the plurality of the support plates
Data Source
AI summary
An arc extinguishing unit and an air circuit breaker comprising same are disclosed. An arc extinguishing unit, according to an embodiment of the present disclosure, comprises an extinguishing magnet unit that forms a magnetic field inside the arc extinguishing unit. Accordingly, a generated arc receives an electromagnetic force in the direction facing the exterior of the air circuit breaker, and thus can be rapidly moved and extinguished. The extinguishing magnet unit is accommodated in a magnet case. The magnet case can seal the extinguishing magnet unit. Therefore, the extinguishing magnet unit is not damaged by the generated arc.