Magnetic Levitation Conveyance Layout for Stable High-Speed Transport
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Solution Overview
Problem
Conveyance apparatuses with moving-magnet type linear motors face productivity issues due to contamination and increased friction during high-speed operations, leading to reduced operating life of linear guides, and existing magnetic levitation solutions do not adequately address stability demands.
Innovation Solution
A magnetic levitation conveyance apparatus with a stator and movable element configuration, utilizing multiple coils and magnet groups arranged along specific directions to achieve contactless conveyance, where the stator includes a first magnet group, a second magnet group facing the coils, and a third magnet group repelling the first magnet group, allowing for stable movement and orientation control of the movable element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a moving-magnet type linear motor with mechanical contact guide is used, then conveyance force and speed are achieved, but contamination and friction increase leading to reduced operating life
Solution Approach 1:
The patent replaces the mechanical contact guide system with a magnetic field-based guide system. The movable element is guided by magnetic attraction to the stator teeth without physical contact, eliminating wear and contamination issues while maintaining precise positioning and high-speed conveyance capability
Solution Approach 2:
The patent introduces magnetic field as an intermediary between the movable element and stator. The magnetic field serves as a non-contact mediator that provides both driving force and guiding function, replacing the need for mechanical contact surfaces
2Reliability
If magnetic levitation is implemented with coils and magnet groups, then contactless conveyance is achieved, but stability control becomes challenging
Solution Approach 1:
The patent divides the magnetic field generation into multiple independent coil groups arranged along the conveyance direction. Each coil group can be independently controlled to provide precise magnetic field distribution, enabling stable levitation and positioning of the movable element
Solution Approach 2:
The patent creates different magnetic field characteristics in different regions by arranging coils and magnet groups with specific polarities. The stator teeth and magnet groups are positioned to generate localized magnetic attraction and repulsion forces that maintain stable contactless guidance
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 solution enables stable and efficient contactless conveyance of the movable element, reducing friction and contamination-related issues, thereby enhancing the operating life and productivity of the conveyance apparatus while maintaining a compact and cost-effective design.
Implementation Method 1
a stator in which a plurality of coils is arranged along a first direction, and a movable element configured to move along the plurality of coils
Implementation Method 2
a third magnet group including a plurality of third magnets arranged to face the first magnet group and magnetized in a direction repelling the first magnet group
Data Source
AI summary
A conveyance apparatus includes a stator in which a plurality of coils is arranged along a first direction and a movable element to move along the plurality of coils. The stator includes a first magnet group including a plurality of first magnets arranged along the first direction and magnetized in one direction. The movable element includes a second magnet group including a plurality of second magnets arranged to face the plurality of coils, and a third magnet group including a plurality of third magnets arranged to face the first magnet group and magnetized in a direction repelling the first magnet group.