Force activated, piezoelectric, electricity generation, storage, conditioning and supply apparatus and methods
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United States of America Patent
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May 18, 2004
Grant Date -
Jul 24, 2003
app pub date -
Dec 2, 2002
filing date -
Jan 18, 2002
priority date (Note) -
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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.
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