Magnetic Blow-Out Breaker Module With Arc Confinement Deflector
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Solution Overview
Problem
Existing electrical breaking technologies face challenges in efficiently managing electric arcs during current interruption, particularly with magnetic blow-out devices that suffer from high magnetic field loss and arc recoil, leading to reduced breaking performance and safety concerns.
Innovation Solution
Incorporating a non-magnetic, electrically insulating deflector within the breaking chamber to create an arc confinement zone, which deflects and constrains the electric arc, promoting cooling and extinction by minimizing air volume and directing the arc plasma path in line with the induced electromagnetic force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single central magnet is used for magnetic blow-out, then the device structure is simple, but magnetic field loss is high and arc blow-out is difficult
Solution Approach 1:
The patent divides the magnetic blow-out function into multiple magnets (first and second magnets) positioned at different locations. Each magnet generates a magnetic field that acts on the arc from a different direction, ensuring comprehensive arc control without excessive magnetic field loss. This segmentation allows the system to achieve effective arc blow-out while maintaining reasonable magnetic field utilization.
2Area of stationary object
If magnetic arms are added to extend the central magnet, then magnetic field coverage is improved, but magnetic field concentration and distortion occur which is counterproductive
Solution Approach 1:
The patent extracts the magnetic field generation function from a single centralized source and distributes it to multiple independent magnets. This eliminates the need for magnetic arms that cause field distortion, while still achieving wide magnetic field coverage. Each magnet independently generates a controlled magnetic field that contributes to the overall arc blow-out effect without creating concentration or distortion issues.
3Volume of stationary object
If a large volume of air is left around the breaking zone, then the structure is simple, but the arc can recoil and reform which is dangerous
Solution Approach 1:
The patent applies local quality by creating a specific magnetic field configuration in the breaking zone that directs the arc in a controlled manner. The magnetic fields from the first and second magnets work together to push the arc toward a designated extinction region, ensuring that even with available air volume, the arc cannot recoil or reform. This localized magnetic control enhances arc extinction reliability while maintaining structural simplicity.
4Reliability
If more expensive magnets are used, then breaking performance is improved, but device cost increases
Solution Approach 1:
The patent employs dynamic magnetic field configuration where the first and second magnets are positioned to create magnetic fields that work synergistically during the breaking process. This dynamic arrangement allows the use of less expensive magnets that can still achieve effective arc blow-out when properly positioned and oriented, thereby improving breaking performance without proportionally increasing device cost.
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 enhances arc voltage generation during current interruption, reduces the magnetic field requirements, and allows for the use of less expensive magnets, while maintaining non-polarized breaking capabilities and improving breaking performance and safety.
Implementation Method 1
a magnetic field source, such as a permanent magnet, arranged in such a way that the breaking response is unchanged regardless of the current direction
Implementation Method 2
The magnetic field, which may be generated by any type of magnetic field source, enables the arc to be displaced as soon as it arises, and stretched rapidly to accelerate cooling until it is extinguished
Implementation Method 3
at least one non-magnetic and electrically insulating deflector, arranged in said breaking chamber to form a physical obstacle in the path of the electric arc when it is magnetically blown
Implementation Method 4
Magnetic blow-out results in a lengthening of the arc and an arc column that licks the insulating inner walls of the housing. Together, these two phenomena tend to cool the arc plasma, increasing its impedance
Data Source
AI summary
An electrical breaking module includes a non-magnetic, electrically insulating casing housing, a fixed contact and a movable contact defining between them a breaking zone in which an electric arc extends at its origin when the electrical circuit is opened. A magnetic blow-out device is provided with at least one magnetic field source arranged in a breaking chamber, opposite the breaking zone to move and stretch the electric arc in a direction substantially perpendicular to the breaking plane towards the housing. The magnetic blow-out device also includes a non-magnetic, electrically insulating deflector, arranged in the breaking chamber to occupy most of the space between the breaking zone and the casing, so as to create at least one arc confinement zone, in which the electric arc when magnetically blown is deflected and constrained to promote its cooling and extinction.