Electromechanical energy harvesting system
First Claim
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1. An ambient energy harvesting system comprising:
- a magnetic flux-generating assembly;
a coil positioned adjacent to the magnetic flux-generating assembly; and
a cantilevered arm, wherein vibration of the cantilevered arm enables relative movement between the magnetic flux-generating assembly and the coil to generate an electric current in the coil;
a stabilizer positioned for linear adjustment along the cantilevered support;
an actuator for selectively adjusting the stabilizer relative to the cantilevered arm to adjust an effective flexible length of the cantilevered arm; and
a controller assembly operatively connected to the actuator for adjusting the effective flexible length of the cantilevered arm such that applied kinetic energy causes the cantilevered arm to vibrate at approximately its resonant frequency.
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Abstract
An ambient energy harvesting system, and method of use thereof, includes a magnetic flux-generating assembly (28), a coil (30) positioned adjacent to the magnetic flux-generating assembly (28), and a cantilevered arm (24). Vibration of the cantilevered arm (24) enables relative movement between the magnetic flux-generating assembly (28) and the coil (30) to generate an electric current in the coil (30). An effective flexible length (L) of the cantilevered arm (24) is selected such that applied kinetic energy causes the cantilevered arm (24) to vibrate at approximately its resonant frequency.
50 Citations
18 Claims
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1. An ambient energy harvesting system comprising:
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a magnetic flux-generating assembly; a coil positioned adjacent to the magnetic flux-generating assembly; and a cantilevered arm, wherein vibration of the cantilevered arm enables relative movement between the magnetic flux-generating assembly and the coil to generate an electric current in the coil; a stabilizer positioned for linear adjustment along the cantilevered support; an actuator for selectively adjusting the stabilizer relative to the cantilevered arm to adjust an effective flexible length of the cantilevered arm; and a controller assembly operatively connected to the actuator for adjusting the effective flexible length of the cantilevered arm such that applied kinetic energy causes the cantilevered arm to vibrate at approximately its resonant frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An energy harvesting system comprising:
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a cantilever beam vibration generator having a cantilevered beam, a magnetic flux source and a coil; an adjustable stabilizer yoke positionable in contact with the cantilevered beam relative to a fixed end of the cantilevered beam, wherein movement of the stabilizer yoke permits adjustment of an effective flexible length of the cantilevered beam; an actuator for moving the stabilizer yoke; and a controller assembly operatively connected to the actuator for adjusting the effective flexible length of the cantilevered arm such that applied kinetic energy causes the cantilevered arm to vibrate at approximately its resonant frequency. - View Dependent Claims (13, 14, 15)
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16. An ambient energy harvesting system comprising:
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a magnetic flux-generating assembly; a coil positioned adjacent to the magnetic flux-generating assembly; a cantilevered arm, wherein vibration of the cantilevered arm enables relative movement between the magnetic flux-generating assembly and the coil to generate an electric current in the coil, and wherein an effective flexible length of the cantilevered arm is selected such that applied kinetic energy causes the cantilevered arm to vibrate at approximately its resonant frequency; and a yoke for supporting the magnetic flux-generating assembly at a free end of the cantilevered arm, wherein the yoke is magnetic flux conducting and forms a portion of a magnetic circuit that includes at least a portion of the magnetic flux-generating assembly. - View Dependent Claims (17, 18)
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Specification