Contactless Mover Transport With Electromagnetic Attitude Control
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Solution Overview
Problem
Existing transport systems with movable magnet type linear motors face issues of contamination and increased friction due to mechanical contact, leading to reduced productivity and guide system size increases from multiple linear motors or electromagnets.
Innovation Solution
A transport system utilizing a mover with parallel first and second magnet groups and coils to achieve contactless movement and attitude control without increasing system size, using electromagnetic forces to guide and control the mover's position and attitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a guide apparatus such as a linear guide is used in a transport system with a movable magnet type linear motor, then the mover can be transported, but contamination substances are issued from sliding portions causing degeneration of productivity
Solution Approach 1:
The patent replaces the mechanical linear guide system with a magnetic field-based guidance system. The mover includes a guide magnet group that interacts with guide coils on the stator to provide contactless guidance, eliminating mechanical sliding portions that generate contamination substances like scrapers and lubricant oil.
Solution Approach 2:
The patent introduces magnetic fields as an intermediary between the mover and stator for guidance. The guide magnet group and guide coils create magnetic forces that guide the mover without direct mechanical contact, serving as a mediator that eliminates contamination from mechanical contact.
2Speed
If a guide apparatus such as a linear guide is used in a transport system with a movable magnet type linear motor, then the mover can be transported, but friction increases during high speed transportation reducing the life of the linear guide
Solution Approach 1:
The patent replaces mechanical sliding contact with magnetic field interaction for guidance. The guide magnet group and guide coils create magnetic forces that guide the mover during high-speed transportation without mechanical friction, eliminating the friction-related wear and life reduction of linear guides.
3Ease of operation
If seven lines of linear motors are installed for controlling transportation and attitude of a mover, then the mover can be controlled, but the size of the system increases
Solution Approach 1:
The patent merges the guidance function with the propulsion function by using the same guide magnet group and guide coils for both lateral guidance and attitude control. This integration eliminates the need for separate seven-line linear motor systems, reducing system size while maintaining full control capability.
Solution Approach 2:
The guide magnet group and guide coils serve multiple functions: lateral guidance of the mover and attitude control (pitch and roll). This multi-functionality allows a single system to replace what would otherwise require separate dedicated systems, reducing overall device complexity.
4Productivity
If six lines of electromagnets for levitation, electromagnets for guiding, and electromagnets for propulsion are installed, then the mover can be levitated and controlled, but the size of the system increases
Solution Approach 1:
The patent combines levitation, guidance, and propulsion functions into an integrated system. The mover includes propulsion magnet groups and guide magnet groups that work with corresponding coils on the stator to provide all three functions simultaneously, eliminating the need for six separate lines of electromagnets.
Solution Approach 2:
The coil systems on the stator serve multiple purposes: generating levitation forces, guidance forces, and propulsion forces. This multi-functionality allows a single set of coils to replace what would otherwise require six separate electromagnet lines, reducing system size while maintaining contactless transportation capability.
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
Enables efficient, contactless transportation and attitude control of the mover with reduced friction and system size, enhancing productivity and reducing mechanical wear.
Implementation Method 1
the mover is able to move in the first direction along the plurality of coils by electromagnetic force received by the first magnetic group from the plurality of coils
Implementation Method 2
an attitude of the mover is controlled by electromagnetic force received by the first magnetic group or the second magnetic group from the plurality of coils
Data Source
AI summary
A transport system includes: a mover having a first magnet group arranged in parallel to a first direction and a second magnet group arranged in parallel to a second direction crossing the first direction; and a plurality of coils arranged in parallel to the first direction so as to be able to face the first magnet group and the second magnet group, and the mover is able to move in the first direction along the plurality of coils by electromagnetic force received by the first magnetic group from the plurality of coils while an attitude of the mover is controlled by electromagnetic force received by the first magnetic group or the second magnetic group from the plurality of coils.