Rotational Generator with Focus Magnets for Extended Energy Duration
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Solution Overview
Problem
Existing motion-activated energy harvesting generators, particularly those using magnetic transduction, face limitations in time duration and power output due to the short duration of electrical energy generation and small energy production, making them unsuitable for powering microelectronic circuitry in remote or harsh environments without battery replacement.
Innovation Solution
A centrally positioned diametrically poled cylindrical Neodymium magnet is inserted within a hollow non-magnetic tube and retained by end caps, allowing it to rotate within a rectangular coil, with focus magnets aligned to concentrate the magnetic field, extending the time duration and power output by inducing a changing magnetic field through the coil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple magnetic circuit make and break connexion is used, then the device structure is simple, but the time period for electrical energy generation is less than 10 milliseconds and the amount of energy produced is extremely small
Solution Approach 1:
The patent transforms the static magnetic circuit into a dynamic rotating magnetic field system. The cylindrical magnet rotates continuously within the coil, creating a continuously changing magnetic flux that induces sustained electrical current. This dynamic approach extends the energy generation duration from brief make-break cycles to continuous rotation-based generation.
Solution Approach 2:
The patent employs periodic rotational motion of the cylindrical magnet to generate electrical energy. The magnet rotates in a periodic manner, creating repeated cycles of magnetic flux change through the coil, which induces continuous alternating current. This periodic action replaces the irregular make-break connexion with a regular, sustained rotational cycle.
2Power
If mechanical springs are used to flip a magnetic element, then the magnetic field can be collapsed or expanded, but the flip transition occurs in less than 10 milliseconds and the energy output remains limited
Solution Approach 1:
The patent replaces the mechanical spring-flip system with a rotational mechanical system. Instead of using springs to rapidly flip a magnetic element, the invention uses a rotating cylindrical magnet that continuously passes by the coil, creating a sustained magnetic field interaction. This substitution extends the interaction time from brief flip transitions to continuous rotational engagement.
Solution Approach 2:
The patent achieves continuous useful action through the rotating magnetic field. As the cylindrical magnet rotates, it continuously generates changing magnetic flux through the coil, producing sustained electrical current. This eliminates the intermittent nature of spring-flip systems and provides continuous energy generation as long as rotation continues.
3Power
If focus magnets are added to concentrate the magnetic field, then the power output and time duration are significantly enhanced, but the device complexity increases
Solution Approach 1:
The patent applies local quality enhancement by introducing focus magnets at specific locations around the cylindrical magnet. These focus magnets are strategically positioned to concentrate and direct the magnetic field lines through the coil, enhancing the magnetic flux density in critical areas. This localized field concentration improves power output without requiring a complete redesign of the entire magnetic circuit.
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 significantly enhances the time duration and power output of the electromagnetic transducer, enabling reliable operation for applications like battery-less wireless key fobs and remote control systems, overcoming the limitations of prior art by providing a more efficient and durable energy harvesting solution.
Implementation Method 1
the cylindrical magnet's field to be pulled into a more concentrated alignment so that more moving magnetic field lines from the cylindrical magnet can cut through the coil windings when the cylindrical magnet is rotated
Implementation Method 2
the frame may hold a plurality of small focus magnets (depending on embodiment) to cause the cylindrical magnet's field to be pulled into a more concentrated alignment
Data Source
AI summary
A centrally positioned cylindrical Neodymium magnet that has opposing magnetic poles, radially disposed on either side of a rotational axis extending along the length of the cylindrical magnet and is centered within a central opening of rectangular coil, where it is free to rotate about its axis in either direction. At least one focus magnet (typically a small disk magnet) having axially opposing magnetic poles, each being arrange across each side substantially along a line parallel to the rotational axis of the cylindrical magnet within the frame, to cause the cylindrical magnet's field to be pulled into a more concentrated alignment so that more moving magnetic field lines from the cylindrical magnet can cut through the coil windings when the cylindrical magnet is rotated by an externally applied force.