Vibration type driving apparatus

Details Vibration type driving apparatus Vibration type driving apparatus

1996-12-30

1999-03-30

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

318116, H01L 4108

Patent

active

058893504

ABSTRACT:
A driving control apparatus of a vibration motor controls the speed of the vibration motor by simultaneously changing the frequency and the amplitude of signals applied thereto, and upon the speed control, a contribution to a rate of change of speed by a change in the driving frequency and a contribution to the rate of change of speed by a change in the amplitude are varied based on a difference between a target speed.

REFERENCES:
patent: 5130619 (1992-07-01), Izuno
patent: 5376855 (1994-12-01), Suganuma
patent: 5459369 (1995-10-01), Mitarai et al.
patent: 5461273 (1995-10-01), Kawasaki et al.
patent: 5477099 (1995-12-01), Suganuma
patent: 5479063 (1995-12-01), Suganuma
patent: 5495152 (1996-02-01), Fukui
patent: 5500565 (1996-03-01), Okubo
patent: 5539268 (1996-07-01), Kataoka
patent: 5612598 (1997-03-01), Fukui et al.

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