Planar Motor Coil Layout for Balanced 2D Transport Force
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Solution Overview
Problem
Existing planar motors exhibit inefficiencies in movement due to differing efficiencies and forces in different main movement directions, primarily caused by varying distances of drive coils from drive magnets.
Innovation Solution
The transport segment is positioned non-horizontally, with drive coils of different properties and orientations to enhance the force component in one main direction over another, and the use of control units to manage electromagnetic interactions for efficient two-dimensional movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If drive coils are arranged at different distances from drive magnets in different movement directions, then the maximum force and efficiency in each direction can be optimized, but the device complexity increases due to different coil properties and orientations required
Solution Approach 1:
The patent applies asymmetry by deliberately arranging drive coils at different distances from drive magnets in different movement directions. The first coil group has coils positioned closer to magnets than the second coil group, creating asymmetric magnetic field interactions that optimize force generation in each direction according to specific operational requirements.
Solution Approach 2:
The patent implements local quality by assigning different coil properties to different spatial locations and movement directions. Each coil group is designed with specific properties (turns, current, positioning) tailored to the requirements of its corresponding movement direction, allowing localized optimization of electromagnetic interaction efficiency.
2Manufacturing precision
If different coil properties are used in different coil groups to optimize force in specific directions, then movement accuracy and efficiency improve, but the ease of manufacture decreases
Solution Approach 1:
Different coil groups are manufactured with locally optimized properties - the first coil group uses specific turn counts, wire gauges, and positioning optimized for high-precision movement in its direction, while the second coil group uses different properties suited to its operational requirements. This localized customization achieves high manufacturing precision in each direction.
Solution Approach 2:
The coil system is segmented into distinct coil groups with independent properties. Each group can be manufactured, tested, and adjusted separately, allowing precise control over the electromagnetic characteristics in each movement direction while maintaining overall system functionality.
3Productivity
If the transport segment is positioned non-horizontally to optimize force components, then movement efficiency in specific directions improves, but the device complexity increases due to additional positioning and control requirements
Solution Approach 1:
The transport segment is positioned at a non-horizontal angle, creating an asymmetric configuration relative to the gravity vector. This angular positioning optimizes the decomposition of gravitational force into components that align with the primary movement directions, enhancing the effectiveness of electromagnetic force generation in specific orientations.
Solution Approach 2:
The system incorporates dynamic control capabilities to adjust and maintain the optimal positioning of the transport segment. The control system dynamically compensates for positioning requirements, allowing the segment to maintain its optimized non-horizontal orientation while adapting to different operational conditions and load variations.
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 configuration allows for more efficient operation by optimizing force components in specific directions, enhancing movement efficiency and accuracy while maintaining a stable levitation force.
Implementation Method 1
a driving force acting on the transport unit is generated by a magnetic field of the stator (of the transport segment(s)) interacting with a magnetic field of the transport unit
Implementation Method 2
Due to the levitation force, the transport unit can be held in a constant position, e.g., an air gap can be created or adjusted and maintained between the transport unit and the transport segments
Data Source
AI summary
Various aspects of the present disclosure are directed to a transport device in the form of a planar motor. In one embodiment, the transport device includes at least one transport segment, first and second coil groups, frive magnets and a control unit. The at least one transport segment forms a transport plane and includes at least one transport unit that moves in the transport plane at least two-dimensionally along two main movement directions. The first coil group, which defines the first main movement direction and has first drive coils, is arranged on the at least one transport segment. The second coil group defines the second main movement direction and has second drive coils is arranged on the at least one transport segment. The drive magnets are arranged on the at least one transport unit. The control unit controls the first drive coils, and the second drive coils.