Power generator employing piezoelectric materials

Details Power generator employing piezoelectric materials Power generator employing piezoelectric materials

2006-02-28

2006-02-28

Schuberg, Darren (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

Reexamination Certificate

active

07005779

ABSTRACT:
An efficient generator of electrical power employs groups of piezoelectric devices disposed in a radial manner about a centrally located cam. The cam, when rotated by a prime mover as a conventional source of mechanical energy, applies a periodic varying force to each piezoelectric device in a suitable sequence. The devices operate to respond to the rotation of the cam by having a cam follower coupled to each device via a spring, whereby a periodically varying force is applied to each piezoelectric device according to the cam surface and based on the rotation of the cam. Each device produces an output voltage according to the force applied to the device via the cam and the coupling between the device and the cam surface. Each device includes a stack of low loss piezoelectric plates connected together and responsive to the application of a mechanical stress to the stack to produce an electrical output.

REFERENCES:
patent: 4399386 (1983-08-01), Osaka et al.
patent: 4782262 (1988-11-01), Kiyo-Oka
patent: 5068565 (1991-11-01), Huang

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