Electromagnetic Actuator Stator Eddy Current Suppression
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Solution Overview
Problem
Conventional electromagnetic actuators face challenges in suppressing eddy currents, which interfere with the magnetic field and require complex structures to manage multiple slits in the stator, limiting their effectiveness.
Innovation Solution
The electromagnetic actuator incorporates a stator with partially formed insulators in the radial direction, extending circumferentially to suppress eddy currents without completely splitting the stator, ensuring a continuous magnetic material structure and minimizing interference with the magnetic field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a single slit is formed in the stator to suppress eddy current, then eddy current suppression is improved, but the suppression effect is insufficient
Solution Approach 1:
The stator is divided into multiple circumferential regions with insulators positioned at specific locations (e.g., 0°, 120°, 240°) to segment the eddy current paths. This segmentation approach allows eddy currents to be suppressed more effectively compared to a single slit, while avoiding the need to completely split the stator structure.
Solution Approach 2:
Insulators are placed only in specific circumferential regions of the stator where they are most needed for eddy current suppression, rather than uniformly distributing them or completely splitting the stator. This local quality approach optimizes the suppression effect while maintaining structural integrity and simplicity.
2Object-affected harmful factors
If two or more slits are formed in the stator to improve eddy current suppression, then suppression effect is improved, but the structure becomes complex
Solution Approach 1:
The stator circumference is divided into multiple regions with insulators positioned at specific locations, achieving effective eddy current suppression through strategic segmentation rather than multiple complete slits. This approach maintains structural simplicity while improving suppression effectiveness.
Solution Approach 2:
Instead of forming complete slits that would require complex holding structures, the invention applies partial action by placing insulators only in specific circumferential regions where they are most effective for eddy current suppression, avoiding unnecessary 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 design effectively suppresses eddy currents, maintaining a strong magnetic field and improving the transient electromagnetic force while maintaining a simple structure, enhancing the actuator's performance and reliability.
Implementation Method 1
The coil generates a magnetic field when being energized
Implementation Method 2
An eddy current is generated on a side of the inner stator close to the coil upon energization
Implementation Method 3
The insulator extends partially along the stator in a circumferential direction and suppresses a current flowing through the stator in the circumferential direction
Implementation Method 4
an electromagnetic actuator that drives an armature by an electromagnetic force
Data Source
AI summary
The present disclosure provides an electromagnetic actuator that drives an armature by an electromagnetic force. The electromagnetic actuator includes a stator, a coil, and an insulator. The stator is formed of a magnetic material and has a cylindrical portion. The coil is disposed outside of the stator. The coil generates a magnetic field when being energized. The insulator is disposed in a particular region of the stator facing the coil in a radial direction. The insulator extends partially along the stator in a circumferential direction and suppresses a current flowing through the stator in the circumferential direction. The stator is continuously formed entirely along the circumferential direction by the magnetic material.