Ultrasonic motor with vibration suppressor

Details Ultrasonic motor with vibration suppressor Ultrasonic motor with vibration suppressor

1990-04-24

1990-12-25

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310323, 310326, 310316, H01L 4108

Patent

active

049805975

ABSTRACT:
An ultrasonic motor includes a retaining member which retains an ultrasonic vibrator. An electromechanical transducing element such as a piezoelectric element is attached on the retaining member. An impedance element is electrically connected with the electromechanical transducing element to form a closed circuit, and the antiresonance frequency of a parallel circuit formed of the reactance component of the electromechanical transducing element and the impedance element is substantially the same as the frequency of the ultrasonic vibration of the ultrasonic vibrator. This structure suppresses undesirable vibration in the retaining member and thus also avoids the undesirable propagation of vibration to external equipment.

REFERENCES:
patent: 4122725 (1978-10-01), Thompson
patent: 4158787 (1979-06-01), Forward
patent: 4513219 (1985-04-01), Katsuma et al.

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