Driving circuit for vibration wave motor

Details Driving circuit for vibration wave motor Driving circuit for vibration wave motor

1986-03-25

1988-02-23

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310323, 310328, H01L 4108

Patent

active

047272767

ABSTRACT:
A driving circuit for a vibration wave motor, in which a periodic voltage is supplied to electromechanical energy converting elements generates a travelling vibration wave in a vibrating member, thus causing a relative movement between the vibrating member and a movable member. For achieving effective operation of the vibration wave motor, the driving circuit controls the amplitude of the periodic voltage supplied to the electromechanical converting elements according to the drive state of the vibration wave motor.

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

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