Driving apparatus for vibration type actuator device

Details Driving apparatus for vibration type actuator device Driving apparatus for vibration type actuator device

1997-04-23

2000-04-25

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310317, H02N 200

Patent

active

060547952

ABSTRACT:
This invention relates to a driving apparatus for a vibration type actuator device which obtains a driving force by applying a frequency signal to an electro-mechanical energy conversion element.
This invention provides, as the driving apparatus, a vibration type actuator device which changes the frequency of the frequency signal until the driving speed reaches a speed higher than a target speed upon driving control to the target speed, and thereafter, switches the control to the target speed to amplitude control of the frequency signal, so that the driving speed can be quickly changed to the target speed, and the subsequent target speed control can be appropriately performed.

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patent: 5736822 (1998-04-01), Mitarai et al.

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