WIRELESS POWER TRANSMISSION
First Claim
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1. A method for wireless power transmission between one or more piezoelectric power harvesting devices attached to a structure a piezoelectric generator attached to said structure, said generator being arranged to generate vibrations in said structure, said method comprising the steps of:
- determining the harvested voltage for the or each power harvesting device in response to a plurality of test generation frequencies for said generator;
selecting a generation frequency from one of said test frequencies based on said harvested voltages in accordance with a predetermined formula; and
driving said generator to generate vibrations in said structure at said generation frequency.
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Abstract
A method, apparatus and software are disclosed for wireless power transmission in which the power transmission frequency is optimised.
6 Citations
31 Claims
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1. A method for wireless power transmission between one or more piezoelectric power harvesting devices attached to a structure a piezoelectric generator attached to said structure, said generator being arranged to generate vibrations in said structure, said method comprising the steps of:
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determining the harvested voltage for the or each power harvesting device in response to a plurality of test generation frequencies for said generator; selecting a generation frequency from one of said test frequencies based on said harvested voltages in accordance with a predetermined formula; and driving said generator to generate vibrations in said structure at said generation frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 18, 31)
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16. Apparatus for wireless power transmission between one or more piezoelectric power harvesting devices attached to a structure a piezoelectric generator attached to said structure, said generator being arranged to generate vibrations in said structure, said apparatus being operable to:
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determine the harvested voltage for the or each power harvesting device in response to a plurality of test generation frequencies for said generator; select a generation frequency from one of said test frequencies based on said harvested voltages in accordance with a predetermined formula; and drive said generator to generate vibrations in said structure at said generation frequency. - View Dependent Claims (17, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification