Ultrasonic vibrator and a method of controllingly driving same

Details Ultrasonic vibrator and a method of controllingly driving same Ultrasonic vibrator and a method of controllingly driving same

1987-04-03

1989-03-14

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310325, 310333, 310357, 310312, H01L 4108

Patent

active

048126977

ABSTRACT:
An ultrasonic vibrator comprises torsional electrostrictive transducers for torsional vibration, longitudinal electrostrictive transducers for longitudinal vibration, and two metallic members firmly, coaxially and integrally holding the torsional electrostrictive transducers and the longitudinal electrostrictive transducers therebetween. An altered section is formed in one of the metallic members in such a shape that makes the torsional resonant frequency and the longitudinal resonant frequency coincide with each other. A voltage or an electric current having a controlled amplitude and/or a controlled relative phase is applied to the electrostrictive transducers to generate composite vibrations of various modes.

REFERENCES:
patent: 4210837 (1980-07-01), Vasiliev et al.
patent: 4562373 (1985-12-01), Tokusima et al.
patent: 4562374 (1985-12-01), Sashida
patent: 4697117 (1987-09-01), Mishiro
patent: 4703214 (1987-10-01), Mishiro
patent: 4705980 (1987-11-01), Mishiro

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