Passive, Self-Tuning Energy Harvester for Extracting Energy From Rotational Motion
First Claim
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1. Energy harvester for extracting energy from rotational motion comprising:
- a radially extending beam having a proximal end mounted a selected distance from an axis of rotation of an object and including a mass greater than or equal to zero at its distal end, wherein the mass, beam characteristics, and the selected distance are selected so that the beam resonant frequency during rotation of the object substantially matches the driven rotational frequency of the object.
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Abstract
Energy harvester. The harvester includes a radially extending beam having a proximal end mounted a selected distance from an axis of rotation of an object and includes a mass at its distal end. The mass, beam characteristics, and the selected distance are chosen so that the beam resonant frequency during rotation of the object substantially matches the driven rotational frequency of the object.
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Citations
7 Claims
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1. Energy harvester for extracting energy from rotational motion comprising:
a radially extending beam having a proximal end mounted a selected distance from an axis of rotation of an object and including a mass greater than or equal to zero at its distal end, wherein the mass, beam characteristics, and the selected distance are selected so that the beam resonant frequency during rotation of the object substantially matches the driven rotational frequency of the object. - View Dependent Claims (2, 3)
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4. Energy harvester for extracting energy from rotational motion comprising:
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a radially extending flexible beam having a proximal end mounted a selected distance from an axis of rotation of an object and including a mass at its distal end; and a relatively rigid electrical energy generating beam mounted adjacent to the flexible beam for receiving an impact from the mass; wherein the mass and selected distance are chosen so that the natural frequency of the flexible beam/mass combination substantially matches the rotational frequency of the object. - View Dependent Claims (5, 6)
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7. Energy harvester for extracting energy from rotational motion comprising:
a self-tuning beam in which beam vibration is the power source for electrical energy harvesting.
Specification