Movable Contact Bracket Assembly for Arc Guidance and Erosion Protection
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Solution Overview
Problem
Existing movable contact bracket assemblies are prone to arc erosion and arc stagnation due to lack of guidance during separation, leading to safety issues and misalignment with stationary contacts.
Innovation Solution
A movable contact bracket assembly featuring a magnetic conductive frame that partially surrounds the movable contact to protect against arc erosion, with strategically placed openings and a guide shaft system to guide arcs to an extinguishing device and ensure alignment with stationary contacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the movable contact is exposed without surrounding structure, then the device complexity is reduced, but the movable contact becomes vulnerable to arc erosion
Solution Approach 1:
The magnetic conductive frame is nested around the movable contact, creating a protective enclosure. The frame is positioned between the movable contact and the external environment, forming a nested structure where the frame surrounds the contact without adding excessive complexity. This nesting approach protects the movable contact from arc erosion while maintaining a compact design.
Solution Approach 2:
The magnetic conductive frame acts as a thin-walled protective shell surrounding the movable contact. The frame is designed with sufficient structural integrity to guide and contain arcs while maintaining a relatively thin profile. This shell structure provides protection against arc erosion without significantly increasing the overall device complexity or size.
2Object-affected harmful factors
If no guidance structure is provided for arc movement, then the device complexity is reduced, but arc stagnation occurs
Solution Approach 1:
The magnetic conductive frame serves as an intermediary structure between the movable contact and the arc extinguishing device. It provides a guided path for arcs to travel from the contact point to the extinguishing device, preventing arc stagnation. The frame acts as a mediator that directs arc movement without requiring complex external guidance mechanisms.
Solution Approach 2:
The patent replaces complex mechanical arc guidance systems with a magnetic field-based approach. The magnetic conductive frame utilizes magnetic field lines to guide arc movement, substituting mechanical guidance structures with a magnetic field-mediated system. This reduces mechanical complexity while effectively preventing arc stagnation through magnetic field guidance.
3Reliability
If no alignment guidance is provided for movable contact, then the device complexity is reduced, but misalignment with stationary contact occurs
Solution Approach 1:
The magnetic conductive frame performs multiple functions simultaneously: it protects the movable contact from arc erosion, guides arc movement to the extinguishing device, and provides alignment guidance for the movable contact. By integrating these functions into a single structure, the patent reduces overall device complexity while improving alignment accuracy and reliability.
Solution Approach 2:
The magnetic conductive frame acts as an intermediary alignment reference between the movable and stationary contacts. It provides a magnetic field-based reference structure that guides the movable contact into proper alignment with the stationary contact, improving alignment accuracy without requiring separate complex alignment mechanisms.
4Object-affected harmful factors
If the magnetic conductive frame completely surrounds the movable contact, then protection from arc erosion is improved, but the weight of the frame increases
Solution Approach 1:
The magnetic conductive frame is segmented or partially opened rather than forming a completely closed enclosure. The frame is divided into sections that provide sufficient protection against arc erosion while removing unnecessary material. This segmentation reduces the weight of the magnetic conductive frame while maintaining adequate protection functionality.
Solution Approach 2:
The frame provides partial surrounding protection rather than complete enclosure, applying the principle of partial action. The magnetic conductive frame surrounds the movable contact in the critical areas where arc erosion occurs most frequently, while leaving other areas open or reduced. This partial protection approach reduces frame weight while maintaining sufficient protection against arc erosion.
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 protects against arc erosion, prevents arc stagnation, and ensures proper alignment between movable and stationary contacts, enhancing safety and reducing heat generation.
Implementation Method 1
a magnetic conductive frame, the magnetic conductive frame is configured to at least partially surround the movable contact to protect the movable contact from arc erosion
Data Source
AI summary
The present disclosure relates to a movable contact bracket assembly and a contactor, the movable contact bracket assembly includes a movable contact and a movable contact bracket, the movable contact bracket assembly further includes a magnetic conductive frame, the magnetic conductive frame is configured to at least partially surround the movable contact to protect the movable contact from arc erosion.