Piezoelectric revolving resonator and single-phase ultrasonic mo

Details Piezoelectric revolving resonator and single-phase ultrasonic mo Piezoelectric revolving resonator and single-phase ultrasonic mo

1989-04-10

1991-04-16

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310357, 310358, 310366, 310369, H01L 4108

Patent

active

050085816

ABSTRACT:
A piezoelectric revolving resonator is disclosed in which a piezoelectric ceramic material in the form of a disk, a cylinder or a pipe is polarized so that two regions divided by its diameter are different in polarity from each other, and electrodes are provided to form equipotential surfaces on opposite principal surfaces and a resonant condition in which piezoelectric deformations are revolved is excited by a single-phase alternating current voltage. Due to the single-phase drive, the structures of the resonator and the drive circuit can be simplified.

REFERENCES:
patent: 4019073 (1987-04-01), Vishnevsky et al.
patent: 4633204 (1986-12-01), Gounji et al.
patent: 4779019 (1988-10-01), Onishi et al.
patent: 4868446 (1989-09-01), Kumada
patent: 4893045 (1990-01-01), Konda
patent: 4893047 (1990-01-01), Honda
patent: 4894578 (1990-01-01), Honda

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