Ultrasonic motor and method of driving the same

Details Ultrasonic motor and method of driving the same Ultrasonic motor and method of driving the same

1995-11-15

1997-06-17

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310316, 310323, H01L 4108

Patent

active

056400659

ABSTRACT:
An ultrasonic motor comprises a piezoelectric element functioning as a driving source; a rectangular-parallelepipedic elastic body coupled to the piezoelectric element and vibrated by the piezoelectric element; and a driving circuit for generating a driving signal consisting of a burst wave with an envelope having attenuation characteristics in a vibration attenuation period of the elastic body and applying the driving signal to the piezoelectric element, thereby generating an extending/contracting vibration along a longitudinal direction of the elastic body and a bending vibration propagating in the longitudinal direction of the elastic body.

REFERENCES:
patent: 5416375 (1995-05-01), Funakubo et al.
patent: 5453653 (1995-09-01), Zumeris

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