Electromagnetic Actuator with Movable Core Gap for Rapid Response
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electromagnetic positioning devices face challenges in achieving rapid response and high magnetic positioning force at the start of the switching process, particularly in valve applications, where flat anchor systems provide large forces but short usable strokes, and feed anchors result in slow responses due to low initial magnetic force.
Innovation Solution
The core unit is designed in multiple parts with an axially movable core section and a stationary core section, creating a core gap that enhances force generation immediately after energization, and the movable core section drives the anchor via driver means to optimize dynamics and force development, with additional features like reduced diameter anchor plunger sections and geometrical configurations for force transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a flat anchor system is used, then large magnetic forces are achieved, but the usable anchor stroke becomes short
Solution Approach 1:
The core unit is divided into multiple parts: a stationary core section and an axially movable core section, creating a core gap that can close during actuation. This segmentation allows the system to generate high forces during gap closure while maintaining a longer overall anchor stroke through the combined motion of core section closure and anchor movement.
2Length of moving object
If feed anchors are used to increase effective stroke, then the usable anchor stroke is increased, but the initial magnetic force becomes low resulting in slow response
Solution Approach 1:
The movable core section is positioned to create a pre-configured core gap that closes immediately upon energization. This preliminary arrangement ensures that high magnetic force is generated at the very start of actuation to rapidly accelerate the anchor, rather than building up force gradually as in feed anchor systems.
Solution Approach 2:
The core unit incorporates a movable core section that dynamically changes position during actuation, transitioning from an open gap state to a closed gap state. This dynamic configuration allows the magnetic circuit to evolve from a high-reluctance state to a low-reluctance state, generating high initial force that maintains rapid response throughout the extended stroke.
3Speed
If the core unit is designed in multiple parts with a movable core section, then high force and rapid response are achieved immediately after energization, but the device complexity increases
Solution Approach 1:
The driver means are integrated directly into the anchor plunger section, merging the force transfer mechanism with the anchor structure itself. This consolidation eliminates the need for separate force transfer components, reducing overall device complexity while maintaining the high-force rapid-response capability provided by the movable core section.
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 achieves a high force and rapid response immediately after energization, enabling low dead times and high dynamics by combining magnetic field forces with the core gap's input force, allowing the anchor to move effectively during the critical response phase.
Implementation Method 1
an anchor movement takes place in an axial direction as a response to the energization of the coil unit (coil device)
Implementation Method 2
a core gap exists between these sections, which is part of the magnetic circuit and can contribute to an additional force generation immediately after energization
Data Source
AI summary
An electromagnetic positioning device has a long stretched out anchor plunger section as well as an anchor having an anchor body section axially continuing the latter, which in order to magnetically interact with a core unit and by energizing a stationary provided coil device is movably designed relative to the latter. The core unit is designed in such a way that it at least sectionally encompasses the anchor plunger section as well as the anchor body section with an expanded diameter relative to the anchor plunger section. The core unit is a multi-part design in the axial direction with a stationary core section, an axially movable core section and a variable core gap between the stationary and movable core section, and the movable core section and anchor are designed and joined together via a driver in such a way that, in response to energization, the movable core section moves, causing the core gap to close, and the driver drives the anchor in the axial direction.