Driving apparatus for ultrasonic motor

Details Driving apparatus for ultrasonic motor Driving apparatus for ultrasonic motor

1988-01-05

1989-08-01

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310316, H01L 4108

Patent

active

048535788

ABSTRACT:
In a driving circuit for a piezoelectric ultrasonic motor (23) supplying driving signal from an astable oscillator (51), which comprises an oscillation IC (49), a capacitor (48) and charge-discharge resistors (45, 46, 47), is controlled by controlling leakage current through a leakage resistor (47) to a point E, through controlling of the voltage of the point E by a temperature-dependent voltage producing circuit 52.

REFERENCES:
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patent: 3719838 (1973-03-01), Peduto
patent: 3967143 (1976-06-01), Watanabe et al.
patent: 4020426 (1977-04-01), Helle
patent: 4267478 (1981-05-01), Ljung et al.
patent: 4314174 (1982-02-01), Wing et al.
patent: 4376919 (1983-03-01), Konno
patent: 4400705 (1983-08-01), Horike
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patent: 4492933 (1985-01-01), Grieco
patent: 4562373 (1985-12-01), Tokusina et al.
"Ultrasonic Motor"; published 1986; Matsushita Electric Industrial Co., Ltd.
Data Book of Industrial Use of the Linear IC: published 1986; pp. 442-447 & 482-487; NEC Corporation.
The Linear Circuits Data Book; published 1985; pp. 9-37-9-45; Texas Instruments Japan Limited.

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