Drive circuit for ultrasonic motor

Details Drive circuit for ultrasonic motor Drive circuit for ultrasonic motor

1995-02-14

1996-08-13

Cabeca, John W.

Electricity: motive power systems

Nonmagnetic motor

310316, 310319, 310311, H02N 1000

Patent

active

055459544

ABSTRACT:
A drive circuit for an ultrasonic motor and, more particularly, a drive circuit for an ultrasonic motor which supplies the ultrasonic motor with drive signals of a predetermined frequency and controls the frequency of the drive signals to drive the ultrasonic motor is disclosed. The disclosed drive circuit for an ultrasonic motor drives an ultrasonic motor without generating a remarkable audible sound, even when a detection signal exceeds a predetermined level within a very short time due to the generation of an audible sound in the ultrasonic motor.

REFERENCES:
patent: 5192889 (1993-03-01), Myohga
patent: 5214339 (1993-05-01), Naito
patent: 5233274 (1993-08-01), Honda et al.
patent: 5365139 (1994-11-01), Kasuga et al.

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