Metal working – Piezoelectric device making
Patent
1996-06-19
1998-09-15
Hall, Carl E.
Metal working
Piezoelectric device making
H04R 1700
Patent
active
058061592
ABSTRACT:
One driver having external electrodes arranged over both surfaces of a piezoelectric ceramic plate polarized in the direction of its thickness, and one generator having two mutually opposed interdigital electrodes on one or both surfaces of a piezoelectric ceramic plate and alternately polarized in the direction of its length between the electrode fingers of the interdigital electrodes are formed combined in alignment in the direction of the length of the piezoelectric ceramic plate. Alternatively, the driver and generator may be formed in alignment in the direction of the width of piezoelectric ceramic plate. By applying a low voltage to this piezoelectric ceramic transformer from the driver at a resonance frequency of a longitudinal vibration of second order mode of the piezoelectric ceramic plate, a high voltage can be picked up from the generator. Here, through connection of the input terminals and output terminals at the nodes of vibration, failure due to vibration of lead wires can be prevented, thereby obtaining a compact and slim transformer element that provides high reliability. A plurality of drivers and generators may also be employed, and in addition, an interdigital electrode may be used in the driver as well as in the generator.
REFERENCES:
patent: 3562792 (1971-02-01), Berlincourt et al.
patent: 3945099 (1976-03-01), Kansy
patent: 4464639 (1984-08-01), Staples
patent: 4564782 (1986-01-01), Ogawa
patent: 5118982 (1992-06-01), Ohnishi et al.
patent: 5365141 (1994-11-01), Kawai et al.
patent: 5402031 (1995-03-01), Tagami et al.
patent: 5424602 (1995-06-01), Sato et al.
patent: 5440195 (1995-08-01), Ohnishi et al.
patent: 5463266 (1995-10-01), Fukuoka et al.
"Piezoelectric Transformers", Electronics Letters, Mar. 31, 1988, vol. 24, No. 7, pp. 444-445.
"Ceramic Transformers and Filters", Proc. Electronic, Comp. Sym., 1956, pp. 205-211.
"Multilayered Piezoelectric Transformer", Ferroelectrics, 1985, vol. 63, pp. 299-308.
Inoue Takeshi
Ohnishi Osamu
Goins Christopher
Hall Carl E.
NEC Corporation
LandOfFree
Piezoelectric ceramic 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 Piezoelectric ceramic transformer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Piezoelectric ceramic transformer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-76228