Vacuum Interrupter Fixed Side Mounting Plate Chattering Suppression
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Solution Overview
Problem
Conventional switching apparatuses face challenges in suppressing contact chattering during closure, leading to increased contact resistance and potential fusion, while also requiring complex configurations to manage high electric fields and energization paths.
Innovation Solution
A switching apparatus with a fixed side mounting plate composed of overlapped plate-like members, supported at the center via impact force transmitting members, and utilizing a divided terminal to attenuate collision energy and reduce the number of laminated sheets, thereby simplifying the configuration and enhancing electric field relaxation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-layer plate fixed conductor is used to suppress chattering, then chattering suppression is improved, but device complexity increases due to the need for electric field relaxation shields
Solution Approach 1:
The fixed conductor is designed to simultaneously serve as both the chattering suppression mechanism (through multi-layer plate structure) and the electric field relaxation shield (through extended portions covering high electric field areas). This multi-functional design eliminates the need for separate electric field relaxation shields, thereby reducing device complexity while maintaining effective chattering suppression.
Solution Approach 2:
The electric field relaxation function is merged into the fixed conductor structure itself by extending certain portions of the multi-layer plate to cover areas with high electric fields. This integration combines the chattering suppression function and electric field relaxation function into a single component, simplifying the overall device structure.
2Strength
If multiple multi-layer plates are used for chattering suppression, then impact relaxation is improved, but the number of components and structure complexity increase
Solution Approach 1:
The fixed conductor is designed to simultaneously serve as both the chattering suppression mechanism (through multi-layer plate structure) and the electric field relaxation shield (through extended portions covering high electric field areas). This multi-functional design eliminates the need for separate electric field relaxation shields, thereby reducing device complexity while maintaining effective chattering suppression.
3Stability of the object's composition
If a complex fixed conductor configuration is used, then energization path stability is improved, but ease of manufacture deteriorates
Solution Approach 1:
The electric field relaxation function is merged into the fixed conductor structure itself by extending certain portions of the multi-layer plate to cover areas with high electric fields. This integration combines the chattering suppression function and electric field relaxation function into a single component, simplifying the overall device structure.
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
Effectively suppresses chattering between contacts, reduces the size of the apparatus, and simplifies the energization path while maintaining effective electric field relaxation and heat dissipation, achieving a more efficient and compact design.
Implementation Method 1
the fixed side conductor of the vacuum interrupter is supported at substantially the center of two supporting portions of the fixed side mounting plate directly or via an impact force transmitting member
Implementation Method 2
collision energy during contact closing operation is attenuated by the fixed side mounting plate portion
Data Source
Figure 1A~2B
Figure 3A~5
Figure 6~7
AI summary
Provided are: a vacuum interrupter (1) having a fixed contact (1a) and a movable contact (1b); a fixed side mounting plate (2) which supports a fixed side conductor (1d) connected to the fixed contact (1a); a cylindrical insulation support (3) in which the vacuum interrupter (1) is contained and to which the fixed side mounting plate (2) is firmly fixed at one end side; and an operating mechanism which is coupled to a movable side conductor (1e) connected to the movable contact (1b) and performs opening and closing operation of both the contacts. The fixed side mounting plate (2) is configured such that a plurality of plate-like members are overlapped; an exposed portion of the fixed side conductor (1d) exposed to the outside of the vacuum vessel (1) is attached with a divided terminal (6) which has a fitting hole to be fitted to the exposed portion and is formed with a slit in a radial direction from the fitting hole; and the divided terminal (6) is fixed to the fixed side mounting plate (2) and the fixed side conductor (1d) is supported by the fixed side mounting plate (2) via the divided terminal (6).