Magnetic Floating Linear Transport for Stable Contactless Guidance
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Solution Overview
Problem
Existing transport systems with movable magnet type linear motors face productivity issues due to contamination and shortened linear guide life from friction, especially during high-speed transportation, and stability problems when transporting small movers or with restricted stator arrangements.
Innovation Solution
A transport system with a magnetic floating type linear motor that uses a stator with coils arranged in multiple directions to apply forces in six axes, allowing for contactless movement of a mover with magnetic bodies, ensuring stable transport even in constrained conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a guiding apparatus with mechanical contact (linear guide) is used, then the transport system can provide stable guidance, but contaminants are generated from sliding portions and friction increases at high speed
Solution Approach 1:
The patent replaces the mechanical contact-based linear guide with a magnetic field-based guidance system. The mover includes magnetic bodies that interact with magnets in the stator to achieve contactless guidance, eliminating wear pieces and lubricant oil that contaminate the transportation path.
Solution Approach 2:
The patent introduces magnetic fields as an intermediary between the mover and stator. Instead of direct mechanical contact, magnetic attraction and repulsion forces are used to guide and propel the mover, eliminating physical sliding portions that generate contaminants.
2Object-generated harmful factors
If a magnetic floating type transport system with divided magnet regions is used, then contactless transport is achieved, but force bias occurs making stable transport difficult
Solution Approach 1:
The patent extends the magnetic field interaction from two-dimensional plane arrangements to three-dimensional spatial distribution. Multiple magnetic bodies are arranged in the vertical direction (Z-axis) in addition to horizontal arrangements, creating force components in multiple dimensions that balance each other and eliminate bias.
Solution Approach 2:
The patent divides the magnetic body into multiple segments (first magnetic body, second magnetic body, third magnetic body) with different polarities and positions. This segmentation allows independent control of force components in different directions, enabling precise force balancing for stable transport.
3Area of stationary object
If magnets are arranged in divided regions in a plane, then the transport system can be compact, but force bias occurs per unit current applied to coils
Solution Approach 1:
The patent transitions from two-dimensional planar arrangement of magnets to three-dimensional spatial arrangement by adding vertical layering. Multiple magnetic bodies are positioned at different heights (Z-axis coordinates), allowing force components to be balanced in all three spatial dimensions while maintaining a compact overall footprint.
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
The system achieves stable and efficient contactless transport of movers by applying forces in multiple axes, reducing friction and contamination, and maintaining productivity even with small movers or restricted stator arrangements.
Implementation Method 1
a stator that includes a plurality of coils arranged in a first direction to be able to face the at least one magnetic body and applies force to the at least one magnetic body by the plurality of coils to which current is applied
Data Source
AI summary
A transport system includes: a mover that includes at least one magnetic body; a stator that includes a plurality of coils arranged in a first direction to be able to face the at least one magnetic body and applies force to the at least one magnetic body by the plurality of coils to which current is applied; and a control unit that controls the current applied to the plurality of coils to apply the force to the at least one magnetic body in the first direction, a second direction crossing the first direction, and a third direction crossing the first direction and the second directions.