Driving apparatus for ultrasonic motor

Details Driving apparatus for ultrasonic motor Driving apparatus for ultrasonic motor

1988-01-12

1989-05-23

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310317, 310323, 318116, H01L 4108

Patent

active

048333590

ABSTRACT:
In a driving apparatus for an ultrasonic motor, which motor has a stator comprising a pair of piezoelectric members for generating travelling mechanical vibrations, the driving apparatus has an oscillator, a phase shift circuit, and delay circuits. By deferring phases of two control signals for two switching devices, there is no fear of dangerous simultaneous turn-ons of the switching devices.

REFERENCES:
patent: 4510411 (1985-04-01), Hakamata et al.
patent: 4513219 (1985-04-01), Katsuma et al.
patent: 4658172 (1987-04-01), Izukawa
patent: 4713571 (1987-12-01), Suzuki et al.
patent: 4727276 (1988-02-01), Izukawa et al.
patent: 4743788 (1988-05-01), Takagi et al.
patent: 4743789 (1988-05-01), Puskas
patent: 4749896 (1988-06-01), Suzuki et al.

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