Vibration type motor device

Details Vibration type motor device Vibration type motor device

1997-11-10

2000-09-19

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

31031602, H01L 4108

Patent

active

06121714&

ABSTRACT:
This invention relates to a vibration type motor which is driven by applying a driving voltage to an electro-mechanical energy conversion element at a floating state. A motor of this type suffers a problem of changes in driving power in correspondence with power supply voltage drifts.
This invention provides a vibration type motor device, which changes the pulse width in correspondence with changes in power supply voltage, and is then floating-driven by a pulse signal with the changed pulse width so as to attain driving by constant electric power independently of changes in voltage.

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