Multi-layer piezoelectric transformer

Details Multi-layer piezoelectric transformer Multi-layer piezoelectric transformer

1997-05-27

1998-11-10

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310333, 310363, H01L 4107

Patent

active

058348824

ABSTRACT:
A multi-layer piezoelectric transformer device includes first and second electroactive members having electrodes bonded to each of their opposing major faces; and a bonding layer disposed therebetween. The first and second electroactive members are polarized in a thickness direction, between their two major faces, such that when energized by an electric field the first and second electroactive members longitudinally strain. The first and second electroactive members are arranged such that deformation of one electroactive member results in corresponding deformation of the other electroactive member. The device provides substantial transformation ratios in which relatively high power may be transferred in relation to the size of the unit, operability over wide input and output frequency bandwidths, and electrical isolation of the voltage and current at the input to the device from the voltage and current at the output of the device.

REFERENCES:
patent: 3093760 (1963-06-01), Tarasevich
patent: 3219850 (1965-11-01), Langevin
patent: 3949247 (1976-04-01), Fenner, et al.
patent: 4786837 (1988-11-01), Kalnin et al.
patent: 5589725 (1996-12-01), Haertling
patent: 5675296 (1997-10-01), Tomikawa

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