Method and device for driving a supersonic motor

Details Method and device for driving a supersonic motor Method and device for driving a supersonic motor

1990-08-02

1992-11-10

Wysocki, A. Jonathan

Electricity: motive power systems

Nonmagnetic motor

310316, H01L 4108

Patent

active

051627086

ABSTRACT:
A method for driving a supersonic motor includes the steps of driving the supersonic motor by supplying a driving voltage of greater frequency than a resonant frequency (point) to a driving piezoelectric electric element. The driving frequency is decreased when a wave form distortion is not generated in an output signal of an oscillation detection piezoelectric element provided in an elastic body. The driving frequency is increased when a wave form distortion is generated in the output signal of the oscillation detection piezoelectric element.

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patent: 4811835 (1989-03-01), Bullivant et al.
patent: 4868445 (1989-09-01), Wand
patent: 4954741 (1990-09-01), Furutsu et al.

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