Bidirectional DC Quenching Chamber With Overlapping Arc Guides
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Solution Overview
Problem
Existing bidirectional direct current switching chambers suffer from electric arcs damaging contacts over time, and there is a desire to reduce the compactness of the contactor while effectively managing these arcs.
Innovation Solution
A bidirectional direct current interruption chamber design that overlaps guiding zones and aligns dispersion units on one side, using a magnetic field to guide arcs to dispersion units, thereby reducing the size of the magnetic field generation device and allowing for compactness and efficient arc management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic blowing technique is used to move electric arcs away from contacts, then contact damage is reduced, but the size of the magnetic field generation device increases
Solution Approach 1:
The patent applies dimensionality change by overlapping guiding zones in different spatial dimensions. The first and second pairs of guides create overlapping guiding spaces that direct arcs to dispersion units positioned on a single side, effectively utilizing three-dimensional space to reduce the overall device volume while maintaining arc control functionality.
Solution Approach 2:
The patent merges the functions of multiple guiding zones by overlapping them in space. Instead of having separate, non-overlapping guiding paths for different contacts, the guides are arranged so their guiding zones overlap, allowing a single set of dispersion units on one side to handle arcs from multiple contact zones, thereby reducing the total device size.
2Volume of stationary object
If dispersion units are positioned on one side only, then device compactness is improved, but arc dispersion efficiency must be optimized
Solution Approach 1:
The patent utilizes spatial dimensionality by positioning all dispersion units on a single side of the breaking chamber while using overlapping guiding zones from multiple pairs of guides to direct arcs from different contact zones to these dispersion units. This three-dimensional arrangement achieves compactness without sacrificing arc dispersion capability.
Solution Approach 2:
The patent segments the arc management function by using multiple pairs of guides (first and second pairs) that create distinct guiding spaces, each directed toward dispersion units on the same side. This segmentation allows independent control of arc paths while maintaining a unified compact structure.
3Volume of stationary object
If guiding zones are overlapped, then magnetic field generation device size is reduced, but guide arrangement complexity increases
Solution Approach 1:
The patent resolves the complexity issue by arranging guides in multiple spatial dimensions. The first and second pairs of guides are positioned at different locations and orientations, creating overlapping guiding zones that converge on the same side where dispersion units are located. This dimensional arrangement achieves volume reduction while maintaining manageable guide 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 achieves reduced size and improved compactness of the cutoff chamber while facilitating efficient arc dispersion and easy venting of ionization gases, enhancing the durability and efficiency of the chamber.
Implementation Method 1
Magnetic blowing is a technique used to move the electric arc away from contacts, specifically to direct it to an arc dispersion unit. This technique involves using a magnetic field so that the Laplace force displaces the electric arc. Indeed, 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
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AI summary
This quenching chamber (100) comprises, for each zone of contact (102*, 104*) between a mobile contact (106) and two fixed contacts (102, 104), respectively, two pairs of guides (102A1, 102A2, 104A1, 104A2) that extend from the mobile contact (106) and the contact zone (102*, 104*) in question, respectively, so as to guide, under the action of a magnetic field (112) of constant direction, an electric arc. The pairs of guides (102A1, 102A2, 102B1, 102B2, 104A1, 104A2, 104B1, 104B2) follow one after the other in the direction of the magnetic field (112) and each pair of guides (102A1, 102A2, 102B1, 102B2, 104A1, 104A2, 104B1, 104B2) delineates between them a guiding zone (602, 604), the guiding zones (602, 604) overlapping at least partially in the direction of the magnetic field (112).