Vibration type actuator device

Details Vibration type actuator device Vibration type actuator device

1995-04-20

1996-07-23

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H02N 200

Patent

active

055392687

ABSTRACT:
A vibration type actuator device having a wave speed control range, wherein the driving voltage of a driving signal of the actuator device is controlled in accordance with the difference between a target speed and an actual speed, so that it increases if the actual speed is lower than the target speed, or decreases if the actual speed is higher than the target speed. The frequency of the driving signal also is controlled to decrease if the driving voltage is higher than a predetermined value, or to increase if the driving voltage is lower than the predetermined value.

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