Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2006-04-18
2006-04-18
Budd, Mark (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S366000
Reexamination Certificate
active
07030538
ABSTRACT:
A low loss, small scale piezoelectric transformer, suited for a cold cathode tube load, and having a high effective coupling factor, is provided using a piezoelectric plate having a single polarization direction. Controlling the dimensions of the third electrode portion15aconstituting the high impedance portion makes it possible easily to adjust the capacitance of the electrostatic capacitor formed between the first electrode portion12and the third electrode portion in accordance with the load. Also, the second electrode portion13and the fourth electrode portion15bconstituting the low impedance portion are substantially equal in area and the third electrode portion and the fourth electrode portion are formed in one piece, so that energy propagation efficiency can be increased. Consequently, the effective coupling factor resulting from the electrode structure and the vibration mode can be kept high even if the capacitance is changed freely, and thus high element efficiency and a small amount of generated heat can be maintained and stress can be decreased.
REFERENCES:
patent: 2976501 (1961-03-01), Mattiat
patent: 3764848 (1973-10-01), Berlincourt
patent: 4896069 (1990-01-01), Rosenberg et al.
patent: 5998937 (1999-12-01), Nishigaki
patent: 6057633 (2000-05-01), Inoi et al.
patent: 6075325 (2000-06-01), Kouno et al.
patent: 6144142 (2000-11-01), Face, Jr. et al.
patent: 6188163 (2001-02-01), Danov
patent: 6268681 (2001-07-01), Yamaguchi et al.
patent: 6320301 (2001-11-01), Noma et al.
patent: 6667566 (2003-12-01), Kim et al.
patent: 1325058 (1973-08-01), None
patent: 4-167504 (1992-06-01), None
patent: 4-338685 (1992-11-01), None
patent: 2666562 (1997-06-01), None
patent: 2830503 (1998-09-01), None
patent: 2000-49399 (2000-02-01), None
Hu, et al., “A ring-shaped piezoelectric transformer operating in the third symmetric extensional vibration mode”, Sensors and Actuators A 88 (2001) 79-86.
Adachi Yusuke
Fukushima Hiroshi
Moritoki Katsunori
Nakatsuka Hiroshi
Takeda Katsu
Budd Mark
Hamre Schumann Mueller & Larson P.C.
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