Switch Arc Contact Magnetic Engaging Mechanism
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Solution Overview
Problem
Existing gas-insulated switching apparatuses face challenges in reducing the duration of arc formation between movable and fixed contacts, leading to increased operation speed and device size and cost, especially when the main circuit is not disconnected.
Innovation Solution
A switch design featuring a movable contact and an arc contact with a magnetic engaging mechanism, where a magnetic material part restricts the arc contact's movement until current flows through a conductor part, allowing the arc contact to move and reduce arc duration, thereby lowering the operation speed of the movable contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the operation speed of the movable contact is increased to reduce the duration of arc formation, then the arc duration is reduced, but the size and cost of the operation device increase
Solution Approach 1:
A magnetic material part is introduced as an intermediary element between the movable contact and the fixed contact. This magnetic part is attracted to the fixed contact by magnetic attraction force, serving as a mediator that pulls the movable contact to make contact with the fixed contact, thereby reducing arc duration without requiring a high-speed operation device
Solution Approach 2:
The patent replaces the purely mechanical high-speed operation system with a hybrid system that incorporates magnetic attraction. Instead of relying solely on mechanical force to achieve high-speed contact, the system uses magnetic field interaction to accelerate the contact process, substituting part of the mechanical operation requirement with magnetic force
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 reduces the duration of arc formation and lowers the operation speed of the movable contact, enabling a reduction in the size and cost of the operation device while ensuring safe operation.
Implementation Method 1
the second magnetic material part is placed at a position that causes, when no current flows through the conductor part, the second magnetic material part to engage with the engaging part to restrict the second contact from moving in the second direction
Implementation Method 2
The second magnetic material part moves to the side of the first magnetic material part so as to disengage from the engaging part
Data Source
AI summary
A switch includes: a first contact and a second contact placed on an operation axis and facing each other; an urging part that urges the second contact to a first contact side; and a second magnetic material part that engages with the second contact to restrict the second contact from moving to the first contact side. The switch also includes: a conductor part that passes current when an arc is formed between the first contact and the second contact; and a first magnetic material part that surrounds the conductor part. When current flows through the conductor part, the second magnetic material part is disengaged from the second contact.