Reclosing Switch Actuation With Permanent Magnet Core and Rapid Reset
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Solution Overview
Problem
Traditional reclosing switches in power distribution networks have complex structures and high fault rates due to reliance on multiple linkage mechanisms, leading to unreliable opening and closing operations, which result in frequent short circuits and high maintenance costs.
Innovation Solution
A reclosing switch design incorporating a permanent magnet moving core, driving member, linkage assembly, limit assembly, opening assembly, and contact mechanism, where the permanent magnet moving core provides a constant driving force for stable opening and closing, utilizing a torsion spring for elastic force and a micro-control switch for rapid reset, ensuring stable contact and separation of the contact mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring is used to control the movement of the contact mechanism, then the contact mechanism can be restored in the opening process, but the frequent use will change the damping performance of the spring, causing the reclosing switch to fail to maintain constant damping
Solution Approach 1:
The patent replaces the traditional spring-based mechanical damping system with an electromagnetic damping system. The damping coil generates electromagnetic force to provide damping during contact mechanism movement, eliminating the need for mechanical springs that degrade over time. This substitution maintains constant damping performance throughout the service life of the switch.
Solution Approach 2:
The patent changes the damping mechanism from a mechanical spring system with variable damping characteristics to an electromagnetic system where damping parameters can be precisely controlled and maintained constant through the damping coil's electromagnetic field, ensuring consistent performance across the operational lifetime.
2Adaptability or versatility
If multiple linkage mechanisms are used to control opening and closing, then the reclosing switch can achieve the required functions, but the structure becomes complex and reliability decreases
Solution Approach 1:
The patent merges multiple separate linkage mechanisms into a single integrated driving member that performs both opening and closing functions. The driving member works in coordination with the limiting assembly and damping assembly to achieve all required functions without requiring separate complex linkage systems for each operation.
Solution Approach 2:
The driving member is designed as a multi-functional component that can perform both opening and closing operations, as well as interact with the limiting assembly to prevent premature operation. This universal component eliminates the need for multiple specialized linkage mechanisms, simplifying the overall structure while maintaining full functionality.
3Ease of operation
If the contact mechanism relies on spring elastic force for restoration, then opening can be achieved, but the damping performance changes with frequent use leading to short circuits
Solution Approach 1:
The patent replaces the mechanical spring restoration system with an electromagnetic system where the damping coil provides both restoration force and constant damping. The electromagnetic field generated by the damping coil maintains consistent damping characteristics regardless of operational frequency, preventing the short circuit issues that arise from spring degradation.
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 enables fast and stable opening and closing of the reclosing switch, reducing the likelihood of short circuits and maintaining reliable operation even after repeated use, by providing a consistent driving force and rapid response mechanism.
Implementation Method 1
the permanent magnetic moving core is configured to provide a driving force to drive the magnet to move axially along the permanent magnetic moving core
Implementation Method 2
the linkage assembly is configured to drive the limit assembly to limit the driving member when the driving member applies the pressing force to the linkage assembly
Implementation Method 3
the opening assembly is configured to provide a reset force to push the limit assembly to reset
Data Source
AI summary
A reclosing switch capable of stably opening and closing, including a bracket, a permanent magnet moving core, a driving member, a linkage assembly, a limit assembly, an opening assembly and a contact mechanism. The permanent magnet moving core is configured to provide a force to drive a magnet to move axially along the permanent magnet moving core. When closing the switch, the driving member applies a pressure to the linkage assembly to drive the limit assembly to limit driving member. The opening assembly is configured to provide a force to push the limit assembly to reset, so as to release the driving member. The magnet is provided with a transmission member for connection with the contact mechanism. The contact mechanism is configured to contact with contacts in the switch.