Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1997-11-18
1998-09-29
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310366, H01L 4108
Patent
active
058149228
ABSTRACT:
A piezoelectric transformer using a piezoelectric annulus, divided into sections, includes at least one input and one output electrode configuration. The input electrodes are formed by covering top and bottom surfaces of the divided section of piezoelectric annulus. The low impedance portions, which are input regions, are poled parallel to the thickness direction and the high impedance portions, which are output regions, are poled tangentially. The transformer is operable at several radial mode resonance frequencies of piezoelectric ring. Two stepped up ac output voltages, in phase or 180 degree out of phase, can be obtained at several resonance frequencies of the piezoelectric annulus. The transformer is also operable as a step-down transformer by inverting the input and output ports.
REFERENCES:
patent: 2830274 (1958-04-01), Rosen et al.
patent: 2974296 (1961-03-01), Rosen
patent: 2976501 (1961-03-01), Mattiat
patent: 3562792 (1971-02-01), Berlincourt et al.
patent: 5278471 (1994-01-01), Uehara et al.
patent: 5365141 (1994-11-01), Kawai et al.
patent: 5371430 (1994-12-01), Sato et al.
patent: 5402031 (1995-03-01), Tagami et al.
patent: 5440195 (1995-08-01), Ohnishi et al.
Ferroelectric, 1986, vol. 68, pp. 225-234, H. Tsuchiya et al., "Design Principles for Multilayer Piezoelectric Transformers".
Koc Burhanettin
Uchino Kenji
Budd Mark O.
Monahan Thomas J.
The Penn State Research Foundation
LandOfFree
Annular piezoelectric transformer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Annular piezoelectric transformer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Annular piezoelectric transformer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-688449