Method and Micro Power Generator For Generating Electrical Power From Low Frequency Vibrational Energy
First Claim
1. A method for generating electrical power from low frequency, vibrational energy, the method comprising:
- receiving vibrational energy having a low frequency;
converting the low frequency, vibrational energy to vibrational energy having a high frequency greater than the low frequency; and
converting the high frequency, vibrational energy to electrical power.
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Abstract
A method and a micro power generator for generating electrical power from low frequency, vibrational energy includes a frequency up-conversion process. The generator is preferably an electromagnetic, vibration-to-electrical power generator which can efficiently scavenge energy from low frequency external vibrations. The generator up-converts low frequency environmental vibrations to a much higher frequency through a mechanical frequency up-converter, and hence provides efficient energy conversion even at low frequencies. This mechanical frequency up-conversion process can be realized in a number of ways. A magnetic method is described as an example. After frequency up-conversion, voltage is induced on coils mounted on resonators by electromagnetic induction. Due to the movement of the coils on their respective resonating cantilevers with respect to the magnet, voltage is generated on the coils and energy conversion is realized.
37 Citations
21 Claims
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1. A method for generating electrical power from low frequency, vibrational energy, the method comprising:
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receiving vibrational energy having a low frequency; converting the low frequency, vibrational energy to vibrational energy having a high frequency greater than the low frequency; and converting the high frequency, vibrational energy to electrical power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A micro power generator for generating electrical power from low frequency, vibrational energy, the generator comprising:
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means for receiving vibrational energy having a low frequency; means for converting the low frequency, vibrational energy to vibrational energy having a high frequency greater than the low frequency; and means for converting the high frequency, vibrational energy to electrical power.
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12. A micro power generator for generating electrical power from low frequency, vibrational energy, the generator comprising:
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a micromechanical first resonator device which resonates in response to the vibrational energy; a micromechanical second resonator device; and a circuit coupled to the resonator devices for coupling the resonator devices together so that the second resonator device resonates at a high frequency greater than the low frequency when the first resonator device resonates, the circuit also converting the high frequency, vibrational energy to electrical power. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification