Switching Device With Opposite Coil Windings
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Solution Overview
Problem
Existing switching devices face issues with arc prevention and migration during short circuits, leading to incomplete current interruption, which can cause device failure and safety hazards due to adverse magnetic field effects on arcs.
Innovation Solution
The design incorporates two electromagnetic releases with coil windings of opposite directions, ensuring that the switch-off arc migrates away from contact points to an arc extinguishing device, reducing contact wear and enabling quick and safe disconnection of defective circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electromagnetic releases with coils of the same winding direction are used, then the switching device can interrupt current flow, but the magnetic field adversely affects the arc migration, preventing the arc from reaching the arc quenching device
Solution Approach 1:
The patent applies asymmetry by configuring electromagnetic releases in adjacent switching sections with opposite winding directions (e.g., first winding direction and second winding direction that are opposite). This creates asymmetric magnetic field distributions that work together to guide the arc toward the arc quenching device rather than interfering with its migration, thus resolving the contradiction between current interruption capability and arc migration assistance.
2Reliability
If the arc is not guided to the arc quenching device, then the switching contacts remain exposed to the arc, but the current flow cannot be interrupted, leading to device failure and safety hazards
Solution Approach 1:
The patent converts the potentially harmful magnetic field effect into a beneficial force by carefully designing the winding directions of electromagnetic releases. The magnetic fields that could otherwise interfere with arc migration are instead configured to assist arc migration toward the arc quenching device. This transforms the harmful factor (magnetic field interference) into a useful function (arc guidance), ensuring both safe current interruption and extended device service life.
3Adaptability or versatility
If multiple switching sections are provided with individual electromagnetic releases, then each section can be independently controlled, but the complexity of coordinating magnetic fields increases
Solution Approach 1:
The patent applies local quality by assigning specific winding directions to electromagnetic releases based on their location in the switching device. Each electromagnetic release is configured with a winding direction appropriate for its specific position and function, rather than using a uniform configuration. This localized optimization allows independent control of each switching section while the overall pattern of opposite windings ensures coordinated magnetic field behavior that guides arcs appropriately.
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
This solution extends the service life of switching devices, enhances safety by ensuring complete current interruption during short circuits, and reduces the risk of arc-related hazards.
Implementation Method 1
a first contact gap (2) having a first electromagnetic release (6) with a first coil winding (7), which first coil winding (7) has a first winding sense (8), the second contact gap (4) having a second electromagnetic release (9) with a second coil winding (10), which second coil winding (10) has a second winding sense (11)
Implementation Method 2
the first winding direction (8) and the second winding direction (11) are designed in such a way that, in the event of a short circuit, the magnetic fields of the first and second release (6, 9) divert the arcs that occur when the first and second switching contacts (3, 5) open
Data Source
Figure 1~2
Figure 3~6
Figure 7
AI summary
The invention relates to a switching device (1) comprising a first switching path (2) having first switching contacts (3) and comprising a second switching path (4) having second switching contacts (5), wherein the first switching path (2) has a first electromagnetic tripping apparatus (6) having a first coil winding (7), wherein the first coil winding (7) has a first winding direction (8), wherein the second switching path (4) has a second electromagnetic tripping apparatus (9) having a second coil winding (10), wherein the second coil winding (10) has a second winding direction (11), wherein the first switching contacts (3) and the second switching contacts (5) are coupled for substantially simultaneous actuation, and wherein the first switching path (2) and the second switching path (4) are arranged adjacent to each other in the switching device (1), wherein, according to the invention, the first winding direction (8) is opposite the second winding direction (11).