Electromagnetic Relay Overlap Design for Magnetic Force
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Solution Overview
Problem
Existing electromagnetic relays do not effectively maximize electromagnetic force between the armature and yoke in the open position, limiting the de-energized contact force and lifespan of the relay.
Innovation Solution
The design includes a yoke and armature with an overlap feature on the side surface of the yoke, allowing a smaller distance between the yoke and armature faces in the open position, enhancing the magnetic flux and electromagnetic force, while maintaining a compact structure and efficient manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the armature is positioned closer to the yoke in the open position, then the electromagnetic force is increased, but the distance between armature face and yoke face is reduced
Solution Approach 1:
The patent extends the overlap laterally beyond the face-to-face distance, utilizing a side dimension to generate additional electromagnetic force. The overlap protrudes laterally from the armature face, creating a side surface that faces the yoke, thereby adding a lateral dimensional component to the magnetic interaction.
Solution Approach 2:
The patent combines the face-to-face magnetic interaction with the side surface-to-side surface magnetic interaction by merging the overlap structure with the armature body. This creates a unified magnetic circuit that utilizes both the front face and lateral side surfaces for electromagnetic force generation.
2Force
If the overlap extends further laterally, then the electromagnetic force is increased, but the device complexity increases
Solution Approach 1:
The patent segments the magnetic interaction into two distinct components: the face-to-face interaction and the side surface-to-side surface interaction. This segmentation allows each component to be optimized independently while contributing to the overall electromagnetic force.
Solution Approach 2:
The patent modifies the geometric parameters of the overlap, specifically the lateral extension distance, to optimize the balance between electromagnetic force generation and device complexity. By adjusting the overlap's lateral dimensions, the design achieves enhanced force without excessive structural 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
This configuration increases the magnetic and electromagnetic force in the open position, enhancing the de-energized contact force and lifespan of the relay, allowing for smaller cross-sectional components and simplified manufacturing.
Implementation Method 1
The electromagnetic relay generates an electromagnetic force between the armature and the yoke
Implementation Method 2
This configuration increases the magnetic and electromagnetic force in the open position
Data Source
AI summary
An electromagnetic relay is disclosed. The electromagnetic relay comprises a coil, a yoke having a yoke face, and an armature. The armature has an armature face facing the yoke face and movable, depending on a current through the coil, between an open position and a closed position in which the armature face is positioned closer to the yoke face, and an overlap disposed over a side surface of the yoke. A first distance between the side surface of the yoke and the overlap is smaller than a smallest second distance between the armature face and the yoke face in the open position.