Piezoelectric transformer, its manufacturing method and its driv

Details Piezoelectric transformer, its manufacturing method and its driv Piezoelectric transformer, its manufacturing method and its driv

1997-07-24

1999-08-17

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310366, 310369, H01L 4108

Patent

active

059398183

ABSTRACT:
In a piezoelectric transformer having a piezoelectric body in polarized condition, input electrodes provided on the surface of the piezoelectric body and applied an alternating voltage of a frequency depending upon the resonance frequency of the piezoelectric body and a leading electrode provided on the surface of the piezoelectric body and taking out a voltage depending upon vibration of the piezoelectric body, and a grounding electrode is further provided on the surface of the piezoelectric body and electrically isolated from the input electrode and taking out output voltage in cooperation with the leading electrode by forming a pair, depending on the vibration of the piezoelectric body. Thus, even when an alternating voltage having a frequency equal to the resonance frequency of the piezoelectric body, respective junctions have sufficient strength against vibration.

REFERENCES:
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patent: 3598909 (1971-08-01), Sasaki et al.
patent: 3610969 (1971-10-01), Clawson et al.
patent: 3622813 (1971-11-01), Kumon
patent: 3736446 (1973-05-01), Berlincourt
patent: 5365141 (1994-11-01), Kawai et al.
patent: 5402031 (1995-03-01), Tagami et al.
patent: 5424602 (1995-06-01), Satoh et al.
patent: 5463266 (1995-10-01), Fukuoka et al.
patent: 5576590 (1996-11-01), Ohnishi et al.

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