Ultrasonic motor with rotor converting longitudinal vibrations i

Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices

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31032312, H02N 200

Patent

active

061664774

ABSTRACT:
An ultrasonic motor having a stator in which at least a longitudinal vibration is generated and a rotor rotatably mounted on the stator. Slanted slits are formed on the cylindrical surface of the rotor, which convert a part of the longitudinal vibration in the stator into a twisting vibration that gives the rotor a rotational force. The slits are slanted to the rotational direction of the rotor. The rotor is rotated at a higher speed because of the slits. The form of the slits may be selectively varied according to desired characteristics of the ultrasonic motor.

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patent: 5521455 (1996-05-01), Miyazawa et al.
patent: 6018213 (2000-01-01), Yano

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