DC Relay Arc Path Magnet Polarity for Center-Away Arc Routing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing DC relays face challenges in controlling the direction of an arc discharge path, leading to potential damage to internal components and user inconvenience due to the dependence on current flow direction, as well as limitations in forming effective arc discharge paths and preventing arcs from reaching the center region.
Innovation Solution
An arc path forming unit with a magnet frame and strategically arranged main magnets that generate a magnetic field to direct the arc discharge path away from the center region, independent of current flow direction, using a configuration of magnets with specific polarities and orientations to create a strong electromagnetic force for effective arc path formation and extinguishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If permanent magnets are provided in the space where fixed contacts and movable contact are in contact, then an arc discharge path can be formed, but the arc may move toward the center region and damage internal members
Solution Approach 1:
The patent divides the magnet arrangement into multiple segments: first and second magnets on opposite side surfaces, and third and fourth magnets on opposite end surfaces. This segmented configuration creates multiple magnetic fields that work together to guide the arc away from the center region, preventing damage to internal members while maintaining reliable arc discharge path formation.
Solution Approach 2:
The patent applies different magnet configurations to different locations: side surfaces have magnets arranged to create horizontal magnetic fields, while end surfaces have magnets arranged to create vertical magnetic fields. This local differentiation ensures that the arc is guided away from the center region in all directions, with each location's magnet configuration optimized for its specific spatial orientation.
2Reliability
If electromagnetic force direction depends on current flow direction, then arc discharge path can be controlled, but user convenience is reduced due to direction restrictions
Solution Approach 1:
The patent creates a universal magnet configuration that handles multiple current flow directions simultaneously. The combination of magnets on side surfaces and end surfaces generates magnetic fields that effectively guide arcs away from the center region regardless of whether current flows in one direction or the opposite direction, eliminating the need for users to consider current direction restrictions.
Solution Approach 2:
The patent extends the magnetic field control from a single plane to three-dimensional space by placing magnets on both side surfaces and end surfaces. This multi-dimensional arrangement creates magnetic fields that can guide arcs away from the center region in all spatial directions, making the arc discharge path control independent of current flow direction.
3Reliability
If magnets are arranged to form arc discharge path, then arc can be discharged, but the structure requires complex magnet configuration
Solution Approach 1:
The patent merges the functions of multiple magnets into a coordinated system where first and second magnets on side surfaces work together with third and fourth magnets on end surfaces. This unified configuration achieves effective arc discharge path formation and center region protection through a systematic arrangement that, while multi-component, follows a clear geometric pattern that simplifies implementation.
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 directs arcs away from critical components, preventing damage and ensuring reliable arc extinguishment, while allowing for flexible arc path direction without structural changes to the DC relay, enhancing user convenience and operational safety.
Implementation Method 1
main magnets coupled to the plurality of surfaces to form magnetic fields in the inner space
Implementation Method 2
The arc discharge path may be formed by the formed magnetic fields and electromagnetic force generated by a flow of current
Implementation Method 3
When the fixed contact and the movable contact are separated from each other, an arc is generated between the fixed contact and the movable contact
Data Source
AI summary
Disclosed are an arc path forming unit and a direct current relay comprising same. The arc path forming unit, according to one embodiment of the disclosure, comprises a plurality of magnet units disposed adjacent to each of fixed contacts. At least one of the plurality of magnet units disposed adjacent to each fixed contact is configured so that the side thereof facing the rest of the magnet units has a different polarity. Accordingly, an arc path is formed from each fixed contact in different directions from each other. Further, the arc path is formed so as to move away from the center part of the arc path forming unit. Accordingly, damage to components disposed in the center part may be prevented.