Electromagnetic Relay Segmented Electromagnets Insulation
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Solution Overview
Problem
The existing electromagnetic relays suffer from the formation of a short-circuit path between fixed terminals due to conductive scattered powder, which deteriorates the insulating properties during the contact and separation of fixed and movable contacts, leading to insulation issues.
Innovation Solution
The electromagnetic relay incorporates a box-shaped insulating housing with a closed space, a pair of fixed terminals, a plate-shaped conductive movable contactor, and a plurality of first electromagnetic members disposed electrically independently with gaps between them, along with a second electromagnetic member that sandwiches the movable contactor, preventing the accumulation of scattered powder by maintaining a gap between the first electromagnetic members and the fixed terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fixed contacts and movable contacts are brought into contact to allow current flow, then the electrical connectivity is improved, but scattered powder accumulates between fixed terminals and first electromagnetic members forming short-circuit paths
Solution Approach 1:
The first electromagnetic members are divided into multiple segments arranged in the first direction, with gaps between them. This segmentation prevents scattered powder from forming continuous conductive paths between fixed terminals, while still allowing the electromagnetic members to function effectively for contact reliability.
Solution Approach 2:
The gaps between the segmented first electromagnetic members act as intermediary spaces that block the formation of continuous short-circuit paths through scattered powder. These gaps serve as protective barriers that maintain insulation while allowing the electromagnetic functionality to persist.
2Volume of moving object
If the first electromagnetic members are disposed close to fixed terminals for compact design, then the device size is reduced, but the risk of short-circuit path formation increases
Solution Approach 1:
By segmenting the first electromagnetic members and introducing gaps between them in the first direction, the design achieves compact dimensions while the gaps themselves serve as insulating barriers that prevent scattered powder from creating short-circuit paths, thus maintaining insulation reliability.
Solution Approach 2:
The gaps are strategically positioned between the first electromagnetic members where scattered powder accumulation would most likely occur. This local structural feature provides enhanced insulation precisely where needed, allowing compact overall design without sacrificing reliability.
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 configuration effectively avoids the formation of a short-circuit path and ensures reliable insulation between the fixed terminals by preventing the accumulation of scattered powder, thereby maintaining the insulating properties of the relay.
Implementation Method 1
a magnetic flux passing through the first electromagnetic member and the second electromagnetic member is generated, and an electromagnetic attractive force acts between the first electromagnetic member and the second electromagnetic member
Implementation Method 2
a magnetic flux passing through the first electromagnetic member and the second electromagnetic member is generated
Implementation Method 3
the powder of the contact, melted by heat of arc, scatters
Implementation Method 4
melted by heat of arc
Data Source
AI summary
An electromagnetic relay includes a box-shaped insulating housing in which a closed space is formed, a pair of fixed terminals fixed to the housing electrically independently of each other and each having a fixed contact placement surface in the closed space, a plate-shaped conductive movable contactor that is provided in the closed space, has a first surface facing the fixed contact placement surfaces of the pair of fixed terminals, and is movably disposed such that the first surface approaches and separates from the fixed contact placement surfaces of the pair of fixed terminals, a pair of fixed contacts respectively provided on the fixed contact placement surfaces of the pair of fixed terminals, and a pair of movable contacts that is respectively provided on the first surface of the movable contactor and respectively face the pair of fixed contacts.