Arc Splitting Blade Layout for Fast Switch Arc Extinction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Switching devices for high voltage applications face damage due to arcs generated when contacts are opened, as existing technologies fail to extinguish these arcs quickly and reliably.
Innovation Solution
A switching device with a housing containing movable contacts, blowout magnets to direct arcs, and a stack of electrically decoupled arc splitting blades positioned close to the contact gap, ensuring arcs are split and extinguished efficiently, with the magnetic field guiding arcs towards the blades for rapid extinguishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the arc splitting blades are positioned closer to the contact gap, then arc extinguishing speed is improved, but the device complexity increases
Solution Approach 1:
The arc splitting blades are segmented into multiple electrically decoupled individual blades arranged in a stack. Each blade is electrically isolated from its neighbors, allowing the arc to be divided into multiple smaller arcs that extinguish more quickly. This segmentation enables rapid arc extinguishing while keeping each blade simple in structure, thereby reducing overall device complexity despite the close positioning.
Solution Approach 2:
The arc splitting blades are positioned in a dimension perpendicular to the contact gap rather than directly in line with it. This dimensional arrangement allows the blades to intercept arcs deflected by the magnetic field without requiring excessive proximity to the contact gap, thus achieving fast arc extinguishing while maintaining a compact and simple device structure.
2Ease of operation
If blowout magnets are used to direct arcs towards the blades, then arc control is improved, but the device complexity increases
Solution Approach 1:
The magnetic field generated by the blowout magnet, which could be considered an additional component increasing complexity, is used to convert the harmful arc into a controlled path that directs the arc toward the splitting blades. The magnetic field naturally deflects the arc without requiring mechanical actuators or complex control systems, thus improving arc control while adding minimal device complexity.
3Reliability
If multiple arc splitting blades are used to split the arc, then arc extinguishing reliability is improved, but the manufacturing cost increases
Solution Approach 1:
Multiple arc splitting blades are arranged in a stacked configuration, with each blade electrically decoupled from its neighbors. This segmentation divides the arc into multiple smaller arcs that extinguish more reliably. The blades can be manufactured as identical or similar components and assembled in a standardized stack, which reduces manufacturing cost through economies of scale and simplified production processes.
Solution Approach 2:
The electrical decoupling between adjacent arc splitting blades is achieved by controlling the distance between them, creating an electrical parameter change that ensures arc splitting without requiring complex insulation structures. This parameter-based approach simplifies manufacturing while maintaining high arc extinguishing reliability.
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 extinguishes arcs quickly and reliably, minimizing smoke and ablation, while maintaining a compact device size and improving reliability, even under varying environmental conditions.
Implementation Method 1
at least one blowout magnet configured to create a magnetic field for distracting arcs generated in the open position
Implementation Method 2
Once the arc has reached one of the arc splitting blades it is split into several smaller arc within the stack and thus quickly extinguished
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a switching device (1), comprising a housing (2) having a contact chamber (14), at least one pair (4) of contacts (6), wherein the contacts of the at least one pair are arranged in the contact chamber and are adapted to be moved from a closed position (44), in which the contacts contact each other, to an open position (34), in which the contacts are spaced apart from one another by a contact gap (36), at least one blowout magnet (8) configured to create a magnetic field for distracting arcs (64) generated in the open position, at least one stack (10) of electrically decoupled arc splitting blades (11) for receiving the arcs, the arc splitting blades at least partially located in the contact chamber, wherein a distance (68) between the at least one stack of arc splitting blades and the contact gap is smaller than 3 lengths of the contact gap. A switching device according to the invention is capable of extinguishing arcs quickly and reliably.