Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1990-02-14
1992-01-21
Stephan, Steven L.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310317, 310330, 310331, H01L 4108
Patent
active
050830562
ABSTRACT:
An electrostriction actuator comprises upper and lower electrostriction boards, having electrodes individually on either side thereof, and a conductive shim interposed between the inside electrodes. The actuator has a fixed end at one end thereof and a free end for bending movement at the other end. An amplifier for supplying driving voltage to the actuator is an inverted amplifier, whose output terminal is connected to the shim, so that an output voltage is supplied to the inside electrodes. The outside electrode of the upper electrostriction board is connected to a power source (not shown) for supplying constant voltage to the amplifier, and the outside electrode of the lower electrostriction board is connected to a power source (not shown) for supplying constant voltage to the amplifier.
REFERENCES:
patent: 4188645 (1980-02-01), Ragle et al.
patent: 4359892 (1982-11-01), Schnell et al.
patent: 4851871 (1989-07-01), Ooe et al.
patent: 4885498 (1986-06-01), Wakita
patent: 4907123 (1990-03-01), Taniguchi et al.
patent: 4978881 (1990-12-01), Wakita et al.
Journal of the Japan Hydraulics & Pneumatics Society (Yuato to Kukiatu); "A High-Speed Electro-Hydraulic Servovalve Using a PMN Electrostrictor", H. Ohuchi, et al, 1986, pp. 74-80.
Japanese Journal of Applied Physics, vol. 21, No. 7; "The Electrostrictive Unimorph for Displacement Control"; K. Abe, K. Uchino, S. Nomura; 1982.
Kondou Yuu
Ono Tomio
Dougherty Thomas M.
Kabushiki Kaisha Toshiba
Stephan Steven L.
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