DC Quenching Chamber With Overlapping Arc Guide Zones
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Solution Overview
Problem
Existing quenching chambers for high voltage DC currents face challenges in compact design and efficient arc dispersion, leading to potential contact damage from persistent electric arcs.
Innovation Solution
A quenching chamber with a magnetic field generation device and overlapping guide zones that direct electric arcs to dispersion units, reducing the size of the magnetic field generation device and allowing for compact design and efficient arc dispersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the magnetic field generation device is made larger to improve arc dispersion, then the arc guidance effectiveness is improved, but the compactness of the quenching chamber deteriorates
Solution Approach 1:
The patent applies dimensional change by arranging guide zones in overlapping three-dimensional space rather than sequential linear arrangement. Multiple guide zones for different contact zones are superimposed in the same spatial region, allowing the magnetic field generation device to serve multiple arc guidance functions simultaneously without increasing overall device volume. This enables effective arc dispersion while maintaining compact chamber design.
2Measurement precision
If the guide zones are arranged separately for each contact zone, then the arc guidance precision is improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple guide zones into overlapping spatial arrangements within a single magnetic field generation device. Instead of creating separate independent guidance systems for each contact zone, the invention combines multiple guide zones that share common magnetic field generation components, thereby reducing overall device complexity while maintaining precise arc guidance for each contact zone through the overlapping zone configuration.
3Object-generated harmful factors
If the dispersion units are placed on opposite sides of two quenching chambers, then the evacuation of ionization gases is improved, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by placing dispersion units on opposite sides of paired quenching chambers, creating separate evacuation pathways for ionization gases. This segmentation allows gases from each chamber to be evacuated independently through dedicated dispersion units, improving overall evacuation efficiency while maintaining manageable system complexity through modular configuration.
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 enhances compactness and facilitates easy evacuation of ionization gases, improving the quenching chamber's efficiency and reducing the risk of contact damage by effectively guiding and dispersing electric arcs.
Implementation Method 1
The magnetic blowing is a known technique for moving the electric arc away from the contacts, in particular to be led to a dispersion unit of the electric arc. This technique involves using a magnetic field so that the Laplace force moves the electric arc. The Laplace force is given by: dF=I·dl·B with F the force applied to the electric arc, I the current of the electric arc, l the element through which the electric arc passes, B the magnetic field to which the electric arc is subjected.
Data Source
AI summary
A quenching chamber includes, for each zone of contact between a mobile contact and two fixed contacts, respectively, two pairs of guides that extend from the mobile contact and the contact zone in question, respectively, so as to guide, under the action of a magnetic field of constant direction, an electric arc. The pairs of guides follow one after the other in the direction of the magnetic field, and each pair of guides delineates between them a guiding zone. The guiding zones overlap at least partially in the direction of the magnetic field.