Levitated Motor-Actuator Using Parallel Dipole Line Trap
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Solution Overview
Problem
Traditional electric motor systems are difficult to miniaturize due to friction losses and adhesion forces at micro- and nano-scales, making them unsuitable for micromechanical systems, which require a non-contact design to operate effectively.
Innovation Solution
A motor-actuator device utilizing a parallel dipole line (PDL) trap system with levitated diamagnetic rotors and non-contact semicircular electrodes, driven by an electrode driver circuit to apply electric pulses, allowing for scalable, frictionless operation and control of rotor position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional electric motor systems are miniaturized, then the motor size is reduced, but friction losses and adhesion forces increase making operation difficult or impossible
Solution Approach 1:
The patent replaces traditional mechanical contact-based motor systems with a magnetic field-based levitated motor system. The rotor is levitated using diamagnetic materials and magnetic fields, eliminating mechanical contact between rotating and stationary components. This substitution of mechanical contact with magnetic field interaction resolves the friction loss problem while enabling miniaturization.
Solution Approach 2:
The patent changes the fundamental operating parameters by using diamagnetic materials with specific magnetic susceptibility values and configuring magnets with particular orientations (diametric magnets). These parameter changes enable stable levitation at micro-scales where traditional motors fail due to adhesion forces, allowing miniaturization without friction penalties.
2Volume of moving object
If traditional electric motor systems are miniaturized, then the motor size is reduced, but adhesion forces between micro- and nano-scale objects increase
Solution Approach 1:
The patent replaces mechanical contact systems with a magnetic field-based levitation system. By using diamagnetic materials and configured magnet arrays, the rotor is suspended without contact, eliminating adhesion forces between moving and stationary components. This enables miniaturization to micro- and nano-scales where adhesion would otherwise dominate.
Solution Approach 2:
The patent employs specific magnetic field parameters including diametric magnet configuration and diamagnetic material selection to generate sufficient levitation force to overcome adhesion forces at micro-scales. The magnetic pressure generated by the configured magnet array exceeds the van der Waals and Casimir forces that would otherwise prevent operation.
3Loss of energy
If non-contact design is implemented, then friction losses are reduced, but device complexity increases
Solution Approach 1:
The patent divides the magnetic field generation into discrete diametric magnets arranged in specific patterns. The electrode system is segmented into multiple independently controllable electrodes. This segmentation allows complex magnetic field configurations to achieve stable levitation while maintaining modular construction that manages overall device complexity.
Solution Approach 2:
The patent integrates multiple functions into unified components: the diametric magnets simultaneously provide structural support and generate magnetic fields for levitation; the electrodes serve both as structural elements and as means for applying electric pulses to drive rotation. This multi-functionality reduces overall device complexity despite implementing non-contact operation.
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 the creation of miniature, scalable electric motors with reduced power consumption and adhesion forces, capable of both rotational and linear actuation, suitable for micro-scale applications with minimal friction and adhesion.
Implementation Method 1
a levitated diamagnetic rotor in between the diametric magnets
Implementation Method 2
PDL trap having a pair of diametric magnets, and a levitated diamagnetic rotor in between the diametric magnets
Implementation Method 3
an electrode shell having at least one pair of semicircular electrodes which surround, but are in a non-contact position with the levitated diamagnetic rotor and each other
Implementation Method 4
applying electric pulses to the at least one pair of semicircular electrodes causing the levitated diamagnetic rotor to rotate
Implementation Method 5
the significant adhesion force between micro- and nano-scale objects attributed to van der Walls and Casimir force
Implementation Method 6
the significant adhesion force between micro- and nano-scale objects attributed to van der Walls and Casimir force
Data Source
AI summary
A motor-actuator device using a PDL trap system is provided. In one aspect, a motor-actuator device includes: a PDL trap having a pair of diametric magnets, and a levitated diamagnetic rotor in between the diametric magnets, wherein at least a portion of the diamagnetic rotor has a rectangular shape; and an electrode shell having at least one pair of semicircular electrodes which surround, but are in a non-contact position with the levitated diamagnetic rotor and each other. A system including the motor-actuator device and an electrode driver circuit is also provided, as is a method of operating the motor-actuator device.