Hollow magnetic metal core pulse energy harvesting generator
View Patent ↗This invention relates to energy harvesting of electrical energy by the change in a magnetic circuitous permeability path for magnetic lines of force that move through a coil of wire to induce, by Faraday's Law of Electromotive Induction, an electromotive force at the coil winding terminals of an associated coil. An abrupt, substantially instant change generated by a magnet's axial or angular mechanical and magnetic contact or dislocation through instant movement of the magnet by magnetic unlike pole spring back attractive force action with a high permeability stationary hollow or solid magnetic metal core centered in a coil bobbin with a wire wound wire coil providing efficient electrical generation therefrom.
1. An electrical generator comprising:
a high permeability magnetic path member having a coil thereon;
a magnet abruptly movable to make and break high permeability contact between one magnetic pole with said high permeability magnetic path;
a relatively lower permeability magnetic path completing a magnetic circuit from said high permeability magnetic path member and an opposite magnetic pole of said magnet, wherein said coil provides a flow of current in response to said magnet abrupt make and break motion, wherein said high permeability path includes a metal core comprising a hollow substantially tubular member having an aperture therethrough;
a push member is movable relative to said hollow substantially tubular member and connected to move said magnet relative to said hollow substantially tubular member; and
a member disposed to limit magnet motion to maintain a magnet position relative to said core sufficient to provide a magnet spring effect that urges said magnet towards said core at any point along a range of travel of said magnet.
2. The electrical generator of claim 1 , wherein said hollow substantially tubular member comprise an outer diameter-to-inner diameter ratio of 1.5 or greater.
3. The electrical generator of claim 1 , wherein said push member further includes a pilot member magnetically attracted by said magnet.
4. The electrical generator of claim 1 , wherein said core is disposed to permit said magnet to come into contact with said core when attracted thereto.
5. The electrical generator of claim 1 , further including a second push member extending substantially parallel to said first push member.
6. The electrical generator of claim 1 , wherein said push member is disposed radially outside said coil.
7. The electrical generator of claim 1 , further including a non-magnetic magnet enclosure connected to said push member and adapted to retain said magnet and to be movable by said push member.
8. The electrical generator of claim 1 , further comprising
a coil support retaining said magnet thereon along a core axis, and
a magnet rotation member angularly movable with respect to said core axis and movably retained by said coil support and disposed to receive a substantially oblique force and to provide said axial force applied to said magnet, wherein
said magnet is releasable from said core by said applied substantially oblique force resulting in a change in magnetic flux through said core upon release from said core and movement therefrom, and wherein
said magnet rotation member is disposed to limit separation of said magnet from said core at a maximum distance sufficient to allow said magnetic attraction to draw said magnet to said core upon withdrawal of said substantially axial force, and
said coil disposed about said core provides an electrical signal in response to said change in magnetic flux.
9. The electrical generator of claim 1 , wherein said coil comprises a length along a core axis, and said core comprises a hollow substantially tubular member of substantially said coil length.
10. An electric generator, comprising:
a high permeability magnetic path member having a coil thereon;
a magnet abruptly movable to make and break high permeability contact between one magnetic pole with said high permeability magnetic path according to magnet motion external to, and toward and away from said coil, respectively, wherein said magnet is disposed to move toward and make contact with said high permeability path by magnetic attraction; and
a relatively lower permeability magnetic path completing a magnetic circuit from said high permeability magnetic path member and an opposite magnetic pole of said magnet, wherein said coil provides a flow of current in response to said magnet abrupt make and break motion.
11. The electrical generator of claim 10 , wherein said magnet comprises a Neodymium magnet.
12. The electric generator of claim 10 , wherein said relatively lower permeability path includes an air gap.