Force activated, piezoelectric, electricity generation, storage, conditioning and supply apparatus and methods
First Claim
1. A force driven source of electrical power, comprising:
- at least one piezoelectric element comprising lead-magnesium-niobate lead titanate (PMN-PT) configured to generate an electrical charge responsive to an applied stress; and
circuitry coupled to said at least one piezoelectric element configured to;
. limit voltage of generated electrical charge therefrom;
rectify electrical charge therefrom;
regulate voltage of electrical charge therefrom;
store regulated electrical charge.
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Accused Products
Abstract
A force activated electrical power generator is provided using piezoelectric elements of preferred lead-magnesium-niobate lead titanate (PMN-PT). The circuitry is in preferred versions completely passive generating all power needed. Some circuitry limits voltage across the elements and provides a return charge channel to prevent depolarization. Transformers can be used to increase the output voltage and efficiency. Rectifiers are shown to rectify the output to a single polarity. Filtering, regulation and other conditioning components are also shown. The output from the generator and circuitry can store the electrical charge, such as in a capacitor and/or battery.
47 Citations
7 Claims
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1. A force driven source of electrical power, comprising:
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at least one piezoelectric element comprising lead-magnesium-niobate lead titanate (PMN-PT) configured to generate an electrical charge responsive to an applied stress; and
circuitry coupled to said at least one piezoelectric element configured to;
.limit voltage of generated electrical charge therefrom;
rectify electrical charge therefrom;
regulate voltage of electrical charge therefrom;
store regulated electrical charge. - View Dependent Claims (2)
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3. A force-driven electrical power system, comprising:
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a plurality of piezoelectric elements comprising lead-magnesium-niobate lead titanate (PMN-PT), each such elements configured to generate an electrical charge responsive to an applied stress which simultaneously forces at least two of said piezoelectric elements;
circuitry coupled to each of the PMN-PT elements configured to;
limit voltage of generated electrical charge therefrom;
rectify electrical charge therefrom;
sum rectified electrical charges therefrom;
regulate voltage of electrical charge therefrom. - View Dependent Claims (4)
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5. A method for producing electrical power, comprising:
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providing at least one piezoelectric element comprising lead-magnesium-niobate lead titanate (PMN-PT);
providing circuitry coupled to said at least one piezoelectric element;
applying force to said at least one piezoelectric element;
generating electrical charge responsive to said applying force;
limiting voltage across the at least one piezoelectric elements using the circuitry;
transforming voltage of the electrical charge generated by the at least one piezoelectric element using the circuitry;
rectifying electrical charge from the at least one piezoelectric element using the circuitry;
regulating voltage of the electrical charge from the at least one piezoelectric element using the circuitry; and
storing regulated electrical charge using the circuitry.
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6. A method for producing electrical power, comprising:
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providing a plurality of piezoelectric elements comprising lead-magnesium-niobate lead titanate (PMN-PT);
providing circuitry coupled to said plurality of piezoelectric elements;
applying a force to said plurality of piezoelectric elements so that force is applied simultaneously through at least two said plurality of piezoelectric elements;
generating electrical charge responsive to said applying a force;
limiting voltage across the plurality of piezoelectric elements using the circuitry;
transforming voltage of charge generated by the plurality of piezoelectric elements using the circuitry;
rectifying electrical charge from the plurality of piezoelectric elements using the circuitry;
summing rectified electrical charge using the circuitry;
regulating voltage of summed electrical charge using the circuitry; and
storing regulated electrical charge using the circuitry. - View Dependent Claims (7)
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Specification