Electromagnetic Relay Shielding Wall Arc Control
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Solution Overview
Problem
Existing electromagnetic relays face challenges in maintaining arc extinguishing performance due to arc voltage reduction and increased arc duration, which affects the reliability of switching operations in applications like electric vehicles.
Innovation Solution
The contact point device includes a shielding wall with a partition wall inside the containing chamber, dividing the chamber into first and second spaces, which shields the arc and maintains its extension, thereby increasing arc voltage and improving extinguishing performance by restricting the arc's movement and facilitating energy release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the containing chamber is provided without internal partitioning, then the device structure is simple, but the arc voltage is reduced and arc duration increases, worsening arc extinguishing performance
Solution Approach 1:
The containing chamber is divided into a first space and a second space by a partition wall. This segmentation restricts arc movement to within one space, preventing the arc from extending across the entire chamber, thereby maintaining higher arc voltage and shorter arc duration without significantly complicating the overall device structure.
2Reliability
If the partition wall is positioned closer to the fixed contact and movable contact, then arc movement is more restricted and arc voltage is maintained higher, but the space for arc extension is reduced
Solution Approach 1:
The partition wall is positioned at an optimized location that balances two competing requirements: it is close enough to the contacts to effectively restrict arc movement and maintain high arc voltage, yet far enough to provide sufficient space within each partitioned area for the arc to extend and release energy. This creates different functional zones within the containing chamber.
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 configuration enhances arc extinguishing performance by maintaining a longer arc state with higher voltage, reducing the time required for arc extinction and improving the reliability of the electromagnetic relay's switching operations.
Implementation Method 1
a shielding wall disposed inside the containing chamber. The containing chamber has a first space and a second space, the shielding wall faces the first space or the second space, the shielding wall includes a partition wall located between the first space and the second space
Data Source
AI summary
A contact point device includes: a fixed contact; a movable contactor that has a movable contact capable of being in contact with the fixed contact by moving in parallel with a first direction, and extended along a second direction orthogonal to the first direction; a containing chamber that contains the fixed contact and the movable contact; and a shielding wall disposed inside the containing chamber. The containing chamber has a first space and a second space, the shielding wall faces the first space or the second space, the shielding wall includes a partition wall located between the first space and the second space, the first space and the second space are disposed side by side in a third direction orthogonal to the first direction and the second direction, and the partition wall is located in the first direction from the fixed contact and the movable contact.