Halbach Arc Path Unit for DC Relay Arc Extinguishing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Direct current relays face challenges in effectively extinguishing and discharging arcs generated during contact separation, leading to potential damage to internal components and safety risks due to unpredictable arc discharge paths and reliance on current direction.
Innovation Solution
An arc path formation unit with a Halbach array and magnet part within a magnet frame, enhancing the magnetic field strength and directing electromagnetic forces to quickly extinguish and discharge arcs away from the central part, preventing component damage and ensuring safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If permanent magnets are provided in the space where fixed contacts and movable contact are in contact, then arc discharge path can be formed by magnetic field and electromagnetic force, but arc cannot be immediately discharged to the outside when electromagnetic force is formed toward the inside
Solution Approach 1:
The patent applies local quality by providing arc discharge path formation units at specific locations where arcs are likely to occur. Each unit includes magnets arranged to create localized magnetic fields that guide arcs away from internal components toward external discharge paths, addressing the harmful effect locally rather than requiring complete redesign of the entire relay structure.
Solution Approach 2:
The patent introduces arc discharge path formation units as intermediary structures between the contact points and internal components. These units act as mediators that intercept and redirect arcs before they can damage internal components, using magnetic fields to create controlled discharge paths that lead arcs externally.
2Reliability
If magnets form magnetic fields in the contact space, then arc discharge path can be created, but arc discharge direction becomes unpredictable and may not discharge externally
Solution Approach 1:
The patent implements local quality by positioning arc discharge path formation units with specific magnet arrangements at critical locations. The magnets in each unit are configured to create localized magnetic fields that consistently guide arcs in predetermined external directions, making the discharge path controllable and predictable rather than random.
Solution Approach 2:
The patent replaces reliance on natural arc behavior with controlled magnetic field guidance. By using magnets to generate magnetic fields that interact with the arc current, the system substitutes uncontrolled physical arc discharge with magnetically guided discharge paths, achieving predictable external discharge.
3Object-affected harmful factors
If arc discharge path formation units are added to control arc paths, then arc can be discharged externally, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the arc protection function into separate arc discharge path formation units. Each unit is a modular component with its own magnet arrangement that can be independently positioned at critical locations, allowing the complex protection function to be achieved through multiple simple, standardized units rather than a single complex system.
Solution Approach 2:
The patent introduces compact arc discharge path formation units as intermediary components between existing relay parts. These units are designed to be space-efficient and can be integrated into the existing relay structure without requiring complete redesign, thus adding necessary protection functionality while minimizing overall device complexity.
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 directs arcs to be extinguished and discharged externally, preventing internal component damage and enhancing the operational reliability of direct current relays by controlling arc paths and reducing the risk of collisions between arcs from different locations.
Implementation Method 1
a Halbach array located in the space part of the magnet frame and configured to form a magnetic field in the space part
Implementation Method 2
The arc discharge path may be formed by the formed magnetic field and an electromagnetic force generated by a flow of current
Implementation Method 3
a Halbach array located in the space part of the magnet frame and configured to form a magnetic field in the space part
Data Source
AI summary
An arc path formation unit and a direct current relay are disclosed. The arc path formation unit, according to various embodiments of the present disclosure, includes a Halbach array provided in at least one of the forward and backward directions. The Halbach array forms a magnetic field within an arc chamber by itself or along with another magnetic body. An electromagnetic force may be generated for inducing an arc that is generated by a formed magnetic field and current flowing through the direct current relay. The electromagnetic force is generated in a direction away from each fixed contact. Accordingly, the generated arc can be extinguished and discharged effectively.