Solenoid Actuator Guide Structure for Higher Magnetic Thrust
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing solenoid actuators face challenges in efficiently transferring magnetic flux between the stator and the mover, which limits their ability to achieve high thrust forces while maintaining compactness.
Innovation Solution
The solenoid actuator design includes a first stator with a first yoke and a cylindrical guide, and a second stator arranged to form a magnetic path around the coil. The cylindrical guide features a magnetic tube in contact with the first yoke and a non-magnetic layer, with a minimum distance between the second stator and the magnetic tube greater than the minimum distance between the second stator and the mover at the original position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the shape of stator or mover is modified to improve magnetic flux transfer efficiency, then the thrust force increases, but the device complexity increases
Solution Approach 1:
The first stator is segmented into a yoke and a cylindrical guide, which are fixed together to form an integrated structure. This segmentation allows each component to serve specific functions: the yoke provides magnetic path and the cylindrical guide ensures precise positioning and magnetic flux transfer, thereby increasing thrust force while maintaining manageable device complexity
Solution Approach 2:
The cylindrical guide is nested within the first stator structure, with the magnetic tube positioned inside the cylindrical guide. This nested configuration allows the magnetic flux path to be efficiently contained within the stator assembly, improving magnetic flux transfer efficiency and thrust force generation without significantly increasing overall device complexity
2Force
If the gap between second stator and magnetic tube is increased, then the magnetic flux transfer efficiency improves, but the device volume increases
Solution Approach 1:
The cylindrical guide extends beyond the distal end of the first yoke, creating a localized region where the magnetic tube is positioned at an optimized distance from the second stator. This local quality adjustment ensures efficient magnetic flux transfer at the critical interface between stators without requiring increased overall device volume
Solution Approach 2:
The cylindrical guide extends in the axial direction beyond the first yoke, utilizing the axial dimension to position the magnetic tube at an optimal distance from the second stator. This dimensional approach allows efficient magnetic flux transfer while maintaining compact radial dimensions, thereby avoiding overall device volume increase
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 enhances the magnetic flux transfer between the mover and the stators, enabling the realization of a compact and high-thrust solenoid actuator.
Implementation Method 1
a mover configured to move in the axial direction toward the second stator from an original position radially inward of the first stator by a magnetic force generated by energizing the coil
Implementation Method 2
The cylindrical guide includes: a magnetic tube disposed in contact with an inner peripheral surface of the first yoke; and a non-magnetic layer covering an inner peripheral surface of the magnetic tube
Data Source
AI summary
A solenoid actuator 1 includes: a coil 3; a first stator 10 that includes a first yoke 14 and a cylindrical guide 30 fixed to an inner peripheral side of the first yoke 14; a second stator 20 arranged to face the first stator 10 in an axial direction so as to form a magnetic path 4 around the coil 3 together with the first stator 10; and a mover 50 configured to move in the axial direction toward the second stator 20 from an original position radially inward of the first stator 10 by a magnetic force generated by energizing the coil 3. The cylindrical guide 30 includes: a magnetic tube 32 disposed in contact with an inner peripheral surface of the first yoke 14; and a non-magnetic layer 34 covering an inner peripheral surface of the magnetic tube 32. A minimum distance d1 between the second stator 20 and the magnetic tube 32 is greater than a minimum distance d2 between the second stator 20 and the mover 50 at the original position.