Driving circuit of a vibration wave motor

Details Driving circuit of a vibration wave motor Driving circuit of a vibration wave motor

1986-02-25

1987-09-08

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310317, 310319, 310323, 310366, H01L 4108

Patent

active

046926496

ABSTRACT:
Disclosed is a driving circuit of a vibration wave motor in which a travelling vibration wave is generated in a vibratory member having a pair of driving electrostrictive element groups arranged or polarized in the fashion of a phase difference by a voltage being applied to the electrostrictive element groups, and the phase of an output signal put out by the vibration of the vibratory member being detected is shifted by a predetermined amount and the vibratory member is induced into a resonating state by the output signal being applied to the driving electrostrictive element groups and by an actuating pulse including a wide band frequency component being applied to the vibratory member particularly during the initial state thereof in which the vibratory member is not resonating.

REFERENCES:
patent: 4484099 (1984-11-01), Kawai et al.
patent: 4504760 (1985-03-01), Yamamoto et al.
patent: 4510411 (1985-04-01), Hakamata et al.

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