Magnetic Gear Arrangement With Filtered Interpole Wiring
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Solution Overview
Problem
Traditional gearboxes are noisy, require lubricating oils that can be hazardous and ineffective in extreme environments, and suffer from mechanical wear, while existing magnetic gearboxes face inefficiencies due to parasitic torques caused by harmonic magnetic fields.
Innovation Solution
A magnetic gear arrangement with interpoles equipped with wiring and electronic filters that modify the magnetic flux, allowing for variable gear ratios by selectively filtering and enhancing magnetic field components, thereby improving coupling efficiency and reducing parasitic torques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional gearboxes with gear wheels are used, then mechanical coupling and gear ratio control are achieved, but noise, mechanical wear, and lubrication requirements increase
Solution Approach 1:
The patent replaces the traditional mechanical gear wheel system with a magnetic field-based system. Permanent magnets mounted on rotors generate magnetic fields that interact through magnetic coupling, eliminating mechanical contact between gears. This substitution removes the sources of mechanical wear, noise, and lubrication requirements while maintaining the gear ratio control function through magnetic pole interactions.
Solution Approach 2:
The patent introduces magnetic fields as an intermediary between the input and output shafts. Instead of direct mechanical contact, the magnetic fields generated by permanent magnets on the rotors serve as the coupling medium. This intermediary approach allows torque transmission and speed reduction without physical contact, thereby eliminating wear and noise associated with traditional mechanical gears.
2Reliability
If magnetic gearboxes with interpoles are used, then mechanical contact is eliminated and wear is reduced, but parasitic torques due to harmonic magnetic fields reduce efficiency
Solution Approach 1:
The patent extracts and removes the harmful harmonic components from the magnetic field. By using electronic filters to process the signals driving the magnetic poles, the system separates and eliminates the parasitic harmonic frequencies that cause unwanted torques. This leaves only the fundamental magnetic field components that produce useful torque, thereby improving efficiency while maintaining the wear-free operation.
Solution Approach 2:
The patent implements feedback control through electronic filtering of the magnetic field signals. The system monitors the magnetic field interactions and uses feedback to adjust the excitation signals, eliminating harmonic components that would otherwise create parasitic torques. This closed-loop approach ensures optimal magnetic coupling and minimizes energy losses.
3Device complexity
If fixed gear ratio magnetic gearboxes are used, then structure is simplified, but adaptability to different speed requirements is limited
Solution Approach 1:
The patent transforms the fixed gear ratio system into a dynamic, variable gear ratio system. By making the magnetic pole configurations adjustable and the electronic filtering parameters variable, the system can change its gear ratio on-the-fly without mechanical reconfiguration. The number and arrangement of active magnetic poles can be dynamically modified to achieve different speed ratios, providing adaptability while maintaining a relatively simple overall structure.
Solution Approach 2:
The patent achieves variable gear ratios by changing the parameters of the magnetic field system rather than the physical structure. By adjusting the number of active magnetic poles, their arrangement, and the electronic filtering characteristics, the system varies its gear ratio through parameter changes. This allows a single physical configuration to provide multiple gear ratios, enhancing versatility without increasing 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
The solution enhances the performance of magnetic gearboxes by optimizing magnetic field symmetry, reducing parasitic torques, and increasing the range of achievable gear ratios, while also generating power from filtered components, thus improving efficiency and noise reduction.
Implementation Method 1
at least one interpole comprises wiring and a switch to activate said wiring, such that activation of said wiring alters the magnetic flux at said interpole
Implementation Method 2
said wiring being electrically connected to an electronic filter, which modifies the current passing through said wiring, so as to modify the influence of said wiring on the magnetic flux at said interpole
Implementation Method 3
Gearboxes and gear arrangements are utilised in a wide range of situations in order to couple drive mechanisms... magnetic gearboxes have been provided which comprise respective gear rotors with interpoles between them. The rotors incorporate permanent magnets
Data Source
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AI summary
A magnetic gear arrangement (10) is provided having a first gear member (12) that generates a first magnetic field and a second gear member (16) that generates a second magnetic field. A plurality of interpoles (20) are disposed between the two gear members (12, 16) for coupling the first and second magnetic fields to control a gear ratio between the gear members (12, 16). At least one interpole (20) has wiring (22) associated with it that can be activated to alter the magnetic flux at the interpole (20), so as to vary the coupling between the first and second magnetic fields. The wiring (22) is electrically connected to an electronic filter (28), which modifies the current passing through the wiring (22), so as to modify the influence of the wiring (22) on the magnetic flux at the interpole (20).