Ultrasonic-motor control system

Details Ultrasonic-motor control system Ultrasonic-motor control system

2005-05-17

2005-05-17

Schuberg, Darren (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

Reexamination Certificate

active

06894422

ABSTRACT:
An ultrasonic-motor control system includes an ultrasonic motor, a controller which starts the ultrasonic motor by changing a drive frequency of the ultrasonic motor from an initial drive frequency, a calculation device which calculates an initial drive frequency data based on a drive frequency at the commencement of rotation of the ultrasonic motor, and a setting device which sets the initial drive frequency based on the initial drive frequency data at a subsequent commencement of driving of the ultrasonic motor.

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patent: 4833358 (1989-05-01), Suzuki et al.
patent: 5146143 (1992-09-01), Furutsu
patent: 5500578 (1996-03-01), Kawamura
patent: 5874799 (1999-02-01), Mitarai et al.
patent: 6238336 (2001-05-01), Ouchi
patent: 7-227089 (1995-08-01), None

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