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, 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.
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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.
46 Citations
20 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, 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. 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; and 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. - View Dependent Claims (14, 15, 16, 17)
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18. A method of electromechanical energy harvesting comprising:
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sensing electrical current generated by relative movement of a coil and a magnetic flux source produced by movement of a cantilevered beam in response to ambient vibration energy; determining a vibration characteristic of the ambient vibration energy; and adjusting an effective flexible length of the cantilevered beam as a function of the vibration characteristic and the sensed electrical current. - View Dependent Claims (19, 20)
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Specification