Electromagnetic Relay Magnetic Arc Extension
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electromagnetic relays face challenges in reducing size and flexibility due to the requirement for equivalent arc extinguishing spaces for each pair of movable and fixed contacts, limiting design options and increasing size.
Innovation Solution
The electromagnetic relay incorporates a magnetic field generation unit that differentially attracts and extends arcs between pairs of contacts, allowing for variable arc extinguishing spaces and contact configurations, such as differing magnetic flux densities and contact distances, to manage arc generation and extinction efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If equivalent arc extinguishing spaces are provided for each pair of movable and fixed contacts, then arc extinction is effective, but the device size increases and design flexibility is reduced
Solution Approach 1:
The patent merges the arc extinguishing function for multiple contact pairs into a single shared arc extinguishing space. Instead of providing separate extinguishing spaces for each movable-f固定 contact pair, the invention uses one common space where arcs from multiple contact pairs can be extinguished simultaneously, thereby reducing the overall device volume while maintaining effective arc extinction.
Solution Approach 2:
The single arc extinguishing space is designed to serve multiple contact pairs universally. The space is configured to accommodate and extinguish arcs generated by different movable and fixed contact pairs, making the extinguishing space multi-functional rather than dedicated to a single contact pair, thus improving space utilization and reducing device size.
2Reliability
If equivalent arc extinguishing spaces are provided for each pair of movable and fixed contacts, then arc extinction is effective, but design flexibility is reduced
Solution Approach 1:
By combining multiple arc extinguishing functions into a single shared space, the invention provides greater design flexibility. The unified space can be positioned and configured more freely without being constrained by the need to allocate equivalent spaces for each contact pair, allowing for optimized layout and easier adaptation to different design requirements.
3Reliability
If permanent magnets are disposed between adjacent fixed contacts to extend arcs upward, then arcs are effectively extinguished, but the device becomes difficult to reduce in size
Solution Approach 1:
The invention combines the arc extending and extinguishing functions into a single shared space rather than requiring separate magnet assemblies for each contact pair. This merging eliminates redundant components and allows for a more compact overall structure, making it easier to reduce device size while maintaining effective arc extinction.
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
This approach enables a compact design with flexible configuration options, effectively extinguishing arcs without the need for equivalent arc extinguishing spaces, reducing the risk of arc contact with resin molds and preventing insulation deterioration.
Implementation Method 1
a magnetic field generation unit disposed so as to attract in a predetermined direction an arc generated between the first movable contact and the first fixed contact and an arc generated between the second movable contact and the second fixed contact
Data Source
AI summary
According to one or more embodiments, when a predetermined time has passed after generation of an arc at least either between a movable contact and a fixed contact or between a movable contact and a fixed contact, an arc generated between the movable contact and the fixed contact is extended by a magnetic field generation unit to be longer than an arc generated between the movable contact and the fixed contact.