Planar Positioning Apparatus Simplified Stator Design
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Solution Overview
Problem
Existing planar positioning devices have complex stator structures that increase production costs and manufacturing complexity due to multiple conductor levels and intricate coil arrangements.
Innovation Solution
A simplified stator structure is achieved by using a two-level printed circuit board with nested flat coils of the same orientation, eliminating the need for additional conductor levels and optimizing crossover areas, allowing for a more compact and cost-effective design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple conductor levels and intricate coil arrangements are used in the stator, then the positioning device achieves adequate performance, but the production costs and manufacturing complexity increase
Solution Approach 1:
The patent merges multiple conductor layers into a single planar conductor arrangement. The coil arrangement is implemented as a two-dimensional pattern of conductor traces on a single substrate plane, eliminating the need for multiple stacked conductor layers while maintaining the necessary electrical connections and magnetic field generation capabilities.
Solution Approach 2:
The invention transitions from a three-dimensional multi-layer conductor structure to a two-dimensional planar conductor pattern. By redistributing conductor paths in the planar domain and using overlapping trace patterns, the design achieves the required coil configurations without vertical stacking, thus reducing structural complexity.
2Ease of manufacture
If multiple conductor levels are used in the stator, then the coil arrangement can be realized, but material and labor costs increase
Solution Approach 1:
Multiple conductor functions are combined into a single planar layer. The patent uses a two-dimensional conductor pattern that integrates the functionality of what would traditionally require multiple stacked conductor layers, reducing both material consumption and manufacturing steps.
Solution Approach 2:
The conductor pattern uses repeated geometric motifs and symmetric arrangements that can be manufactured using standardized PCB fabrication processes. The coil patterns are created as replicated trace designs across the stator surface, enabling cost-effective mass production through conventional manufacturing methods.
3Device complexity
If a simplified two-level printed circuit board structure is used, then production costs decrease, but the coil arrangement must be redesigned
Solution Approach 1:
The coil arrangement is redesigned as a two-dimensional trace pattern on a single PCB layer. Conductors are routed in overlapping parallel paths that create the necessary magnetic field configurations when viewed in planar projection, eliminating the need for vertical conductor stacking while maintaining electrical functionality.
Solution Approach 2:
The PCB design uses different trace densities and patterns in different regions of the stator to optimize magnetic field distribution. The conductor trace geometry is locally adjusted to provide appropriate current density and magnetic field strength at each position, achieving performance requirements through spatial variation rather than structural complexity.
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 approach reduces material and labor costs, simplifies the manufacturing process, and enables a wider range of travel while maintaining position accuracy, making the positioning device more efficient and affordable.
Implementation Method 1
a coil arrangement of flat coils... an evaluation and control device for evaluating position signals from the position detection device and for controlling the current supply to the coil arrangement for position control of the rotor with respect to the stator
Implementation Method 2
a rotor arranged opposite the stator in the operating position of the positioning device, which has a planar magnet arrangement of several rows of magnets
Data Source
Figure 1~2
Figure 3
Figure 3A
AI summary
The invention relates to a planar positioning apparatus, comprising a stator, which comprises a coil arrangement comprising flat coils, a rotor which is arranged opposite the stator in the operating position of the positioning apparatus and has a planar magnet arrangement comprising a plurality of rows of magnets, wherein the plane which is spanned by the planar magnet arrangement is arranged parallel to the plane of the coil arrangement, a position detecting device for detecting the position of the rotor relative to the stator, and an evaluation and control device for evaluating position signals of the position detecting device and for controlling a current supply to the coil arrangement for controlling the position of the rotor with respect to the stator, wherein the coil arrangement comprises in each case n x 3 ( n ≥ 1) elongate flat coils which are interleaved with one another, in a first and second orientation of the coil arrangement which, over the majority of their extent, are designed as conductor runs of a first plane of a multiple-plane printed circuit board, and the conductor runs of the three associated flat coils enclose crossover regions which run in a second plane of the multiple-plane printed circuit board.