DEVICE FOR CONVERTING MECHANICAL ENERGY INTO ELECTRICAL ENERGY
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United States of America Patent
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Issued Date -
Sep 19, 2013
app pub date -
Nov 28, 2011
filing date -
Nov 29, 2010
priority date (Note) -
Abandoned
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Abstract
An apparatus for converting mechanical vibrational energy into electrical power includes first and second collecting electrodes configured for connection to terminals of an electrical load, and an electret placed facing the first electrode. The electret is mounted so as to move relative to the first electrode in one degree-of-freedom in a plane. Relative movement between the electret and the first electrode induces a potential difference across the electrodes. The electret has a continuous layer and a series of protrusions, each of which extends perpendicular to the plane. These protrusions are distributed in the degree-of-freedom with a first pitch, which is smaller than the travel between the first electrode and the electret. The first electrode has faces facing the electret. These faces are distributed in the degree-of-freedom with a second pitch identical to the first pitch.
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