Ultrasonic motor

Details Ultrasonic motor Ultrasonic motor

1994-12-22

1996-05-28

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4108

Patent

active

055214550

ABSTRACT:
An ultrasonic step motor is provided with a stator and rotor. The rotor has a plurality of projections extending in the direction of the stator so that contact is made between the rotor and the stator creating a frictional force to drive the rotor. Vibrators are formed from a piezoelectric material directly attached to the stator. The ultrasonic motor further includes a drive control apparatus for impressing standing waves to the vibrating elements of the vibrator causing a change over to the phase or carrying out an ON-OFF operation of the ultrasonic motor.

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Iijima, et al, Ultrasonic Motor Using Flexural Standing Wave, Japanese Journal of Applied Physics Supplement, vol. 26, No. 26-1, 1987.

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