Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1996-11-04
1998-04-07
Dougherty, Thomas M.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310366, H01L 4108
Patent
active
057368074
ABSTRACT:
In a piezoelectric transformer comprising first and second driving blocks which are operable in a piezoelectric transverse vibration mode to induce a longitudinal vibration in a longitudinal direction and a voltage generating block formed between the first and the second driving blocks and which is operable in a piezoelectric longitudinal vibration mode in response to the longitudinal vibration, the voltage generating block comprises first and second voltage generating portions for generating an output voltage by the piezoelectric longitudinal vibration mode, a primary voltage producing portion formed between the first and the second voltage generating portions, and first and second secondary voltage producing portions formed at both sides of the voltage generating block. The first and the second driving blocks are supplied, in common, with an a.c. voltage through first and second input terminals. The primary and the first and the second secondary voltage producing portions deliver the output voltage through first and second output terminals.
REFERENCES:
patent: 5278471 (1994-01-01), Uehara et al.
patent: 5440195 (1995-08-01), Ohnishi et al.
Hakamata Hiroyo
Inoue Takeshi
Dougherty Thomas M.
NEC Corporation
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