Radially Repulsive Magnetic Bearing for Passive Platform Alignment
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Solution Overview
Problem
Current systems for maintaining alignment between optical or electromagnetic elements are complex, costly, and prone to reliability issues due to the need for active control mechanisms and precise passive alignment methods, which can experience misalignment caused by thermal or structural drift and variations.
Innovation Solution
A radially repulsive magnetic bearing system using concentric axially polarized magnets that self-align optical or electromagnetic elements by applying a magnetic field, allowing for alignment without the need for electronic control or precise mechanical tuning, using readily available permanent magnets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If active servo-based control mechanisms are used to maintain alignment, then alignment precision can be maintained, but device complexity and cost increase significantly
Solution Approach 1:
The patent replaces active servo-based control mechanisms (electronic, mechanical) with a passive magnetic field-based alignment system. The magnetic bearing uses magnetic fields to provide contactless support and alignment forces, eliminating the need for position sensors, micro-actuators, and complex electronic control systems while maintaining alignment precision between optical elements.
Solution Approach 2:
The magnetic bearing system provides self-aligning capabilities through the inherent properties of magnetic fields. The radially repulsive magnetic forces automatically maintain proper spacing and alignment between platforms without requiring external control signals, feedback mechanisms, or manual intervention, thereby reducing device complexity while preserving alignment precision.
2Measurement precision
If passive alignment mechanisms with precisely controlled shapes are used, then alignment can be forced, but non-repeatable alignment forces occur between insertions
Solution Approach 1:
The patent replaces mechanical contact-based passive alignment mechanisms (such as cylindrical ferrules, alignment sleeves, and V-grooves) with a magnetic field-based system. This substitution eliminates physical contact between alignment surfaces, thereby avoiding variations in contact conditions that cause non-repeatable alignment forces during repeated insertions and extractions.
Solution Approach 2:
The magnetic bearing system allows for dynamic adjustment of magnetic field strength and distribution to compensate for thermal drift and structural variations. By changing magnetic field parameters rather than relying on fixed mechanical geometries, the system maintains repeatable alignment forces across multiple connection cycles while accommodating environmental changes.
3Measurement precision
If active control mechanisms are used, then alignment can be maintained, but continuous power supply is required
Solution Approach 1:
The patent replaces active control mechanisms that require continuous electrical power with a passive magnetic bearing system. The magnetic fields are generated by permanent magnets or magnetized components that maintain alignment forces without requiring electrical power input, thereby achieving sustained alignment precision with zero operational power consumption.
Solution Approach 2:
The magnetic bearing system is self-sustaining, using the inherent magnetic properties of its components to maintain alignment without external energy input. The system automatically compensates for drift and maintains precision alignment through the persistent magnetic fields, eliminating the need for continuous power supply required by active control mechanisms.
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 maintains high optical coupling and stability between elements, reducing the impact of thermal expansion and structural variations, while being cost-effective and reliable, as it uses passive means to ensure alignment without requiring continuous power or complex electronics.
Implementation Method 1
a radially repulsive magnetic bearing, which includes a first axially polarized magnet and a second axially polarized magnet that is concentrically disposed around the first axially polarized magnet and radially repulsive to the first axially polarized magnet
Data Source
AI summary
In certain embodiments, apparatus for self-aligning elements of coupled platforms includes a radially repulsive magnetic bearing. The radially repulsive magnetic bearing includes a first axially polarized magnet and a second axially polarized magnet that is concentrically disposed around the first axially polarized magnet and radially repulsive to the first axially polarized magnet. The radially repulsive magnetic bearing is configured to align a first element of a first platform with a second element of a second platform when the first and second platforms are coupled together.