Magnetic Actuator Spring Segmentation for Compact Design
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Solution Overview
Problem
Conventional magnetic actuators are too long due to the length of their central spring, making them unsuitable for installations where space is limited.
Innovation Solution
The use of two springs adjacent to the central portion or a single spring around the circumference of the magnetic actuator, allowing for a shorter profile and enabling the actuator to be housed in a smaller enclosure, thereby reducing overall length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a single long spring is used in the center of the magnetic actuator, then the spring can provide the necessary mechanical force, but the overall length of the actuator increases making it unsuitable for space-limited installations
Solution Approach 1:
The single long spring is divided into multiple shorter springs (typically two or more) that are positioned side-by-side or in parallel within the actuator assembly. This segmentation allows the springs to collectively provide the necessary mechanical force while having a shorter individual length, thereby reducing the overall length of the actuator housing without sacrificing force output capability
Solution Approach 2:
Instead of extending the spring in the longitudinal direction (one dimension), the solution transitions to arranging multiple springs in a lateral or radial configuration (adding another dimension). This dimensional change allows the force-generating elements to be distributed across a wider footprint rather than extending the length, effectively solving the space constraint problem while maintaining force capability
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 allows magnetic actuators to be used in scenarios with limited space, providing a low-profile solution for applications such as circuit breakers, while maintaining operational effectiveness.
Implementation Method 1
When the windings of coil 135 become energized, coil 130 acts as an electromagnet to move plunger 140 in a linear direction
Implementation Method 2
booster magnet 120 may include a conventional magnet that is used to hold plunger 140 adjacent booster magnet 120 when coil bobbin 130 is not energized
Implementation Method 3
two springs may be located within housing 115. The two springs allow the magnetic actuator to be shorter in length than conventional actuators
Data Source
AI summary
A magnetic actuator includes a coil bobbin that has electrical wire wound around a core. The magnetic actuator also includes a plunger located in a central portion of the magnetic actuator and configured to move within a bore located in the central portion, and at least one spring located adjacent the central portion. When electrical current is provided to the electrical wire, an electromagnetic field causes the plunger to move from a first position to a second position, and stored energy associated with the spring aids in moving the plunger to the second position. The magnetic actuator further includes a linking portion coupled to the plunger, wherein the linking portion is configured to initiate an action based on movement of the plunger.