MEMS Oscillating Current Converter with Nested Magnet
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Solution Overview
Problem
Conventional oscillating current converters using MEMS technology face challenges in reducing size while maintaining conversion efficiency, due to differences in electromotive force production and bulkiness, particularly with the placement of magnets and cantilevers.
Innovation Solution
The oscillating current converter design incorporates a cantilever with an opening where a magnet can enter, allowing for relative motion within the coil, enhancing magnetic flux variation and electromotive force generation, while minimizing device size through optimized magnet placement and cantilever configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the lengths of the cantilevers are increased to increase the amplitudes of the cantilevers, then the amplitudes are increased, but the device becomes bulky
Solution Approach 1:
The magnet is positioned to enter into the inside of the opening formed on the distal end side of the cantilever, nesting the magnet within the cantilever structure. This allows the magnetic field to be concentrated within a compact volume while maintaining effective interaction with the coil, resolving the contradiction between achieving large amplitudes and keeping the device compact.
Solution Approach 2:
The invention transitions from a conventional side-by-side arrangement to a three-dimensional configuration where the magnet enters through the distal end opening of the cantilever. This spatial reconfiguration allows the magnetic flux to pass through the coil in a different dimensional arrangement, enhancing the electromotive force generation without increasing the overall device footprint.
2Volume of moving object
If the distance between the cantilevers and the magnet is not the same, then the device can be compact, but a difference occurs in the electromotive force produced in the coils
Solution Approach 1:
The opening is specifically positioned on the distal end side of the cantilever, creating a localized interaction zone where the magnet enters. This local configuration ensures that the magnetic flux concentrates precisely where the coil is positioned, maintaining consistent electromotive force generation across all coils regardless of varying distances between cantilevers and magnets.
3Power
If a large magnet is used to produce a large electromotive force, then the electromotive force is increased, but the device becomes bulky
Solution Approach 1:
The magnet is nested within the opening of the cantilever, allowing the magnetic field to be concentrated within the compact cantilever structure. This nesting arrangement enables a small magnet to generate sufficient electromotive force by concentrating the magnetic flux through the coil, eliminating the need for large magnets and keeping the device compact.
Solution Approach 2:
The invention changes the spatial parameters of the magnetic field interaction by positioning the magnet to enter through the distal end opening. This parameter change optimizes the magnetic flux density through the coil, enabling efficient electromotive force generation with a compact magnet size.
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 design efficiently converts oscillations into electric current with improved conversion efficiency and reduced device size, enabling the oscillating current converter to produce a large electromotive force while maintaining compactness.
Implementation Method 1
the cantilever oscillates to generate an induced electromotive force in the coil
Data Source
AI summary
To provide an oscillating current converter fabricated by utilizing the MEMS technology making it possible to further decrease the size yet improving the conversion efficiency.An oscillating current converter 1 fabricated by using the MEMS technology and comprising a cantilever 4 having an opening 5 formed on the distal end side thereof and is cantilevered on the proximal end side thereof, a coil 6 wound around the opening 5 of the cantilever 4, and a magnet 8 arranged so as to enter into the inside of the opening 5 of the cantilever 4, wherein the cantilever 4 oscillates to generate an induced electromotive force in the coil 6.