Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1991-02-28
1993-06-29
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
7386122, H01L 4108
Patent
active
052237630
ABSTRACT:
An apparatus and method are disclosed for producing electrical power from wind flow. The apparatus includes a conduit (13) with a variably sloped wall (59) for channeling the wind flow along a predetermined path (23), a baffle (25) positioned in the path of the flow for forming vortices (27-33) in the flow, and a plurality of piezoelectric transducers (35-45) positioned in sequence, each positioned a predetermined distance from the other, in the path of the flow for producing electrical output signals in response to pressure applied by the vortices upon the transducers. The individual output signals are combined to produce an aggregate power output. The system also includes a frequency counter (61) responsive to the output signal of at least one transducer for determining wind velocity. The method employed by the system includes the steps of channeling the wind flow along a predetermined path, forming vortices in the flow by positioning a baffle in the path of the flow and by varying the slope of the wall (and hence, the flow) so that the Reynold's Number representative of the flow is in the range from 40 to 300, conducive to formation of vortices, and positioning the transducers in the path of the vortices for producing electrical power in response to pressure from the vortices upon the transducers.
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Budd Mark O.
Denson-Low Wanda K.
Dougherty Thomas M.
Grunebach Georgann S.
Hughes Aircraft Company
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