Vibration wave motor

Details Vibration wave motor Vibration wave motor

1987-06-08

1988-12-27

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310323, H01L 4108

Patent

active

047942940

ABSTRACT:
A vibration wave motor generates a travelling vibration wave by applying periodic voltages of different phases to electro-mechanical energy transducers located at two different positions on a stator, and drives a movable member by the vibration wave. In order to adjust the speed of the vibration wave motor, the phase difference between the periodic voltages applied to the transducer is adjusted or the application of the periodic voltage to one or both of the transducers is selectively blocked.

REFERENCES:
patent: 4400641 (1983-08-01), Vishnevsky et al.
patent: 4491401 (1985-01-01), Inaba et al.
patent: 4510411 (1985-04-01), Hakamata et al.
patent: 4513219 (1985-04-01), Katsuma et al.
patent: 4562373 (1985-12-01), Tokusima et al.
patent: 4613782 (1986-09-01), Mori
patent: 4658172 (1987-04-01), Izukawa
patent: 4692649 (1987-09-01), Izukawa
patent: 4692672 (1987-09-01), Okuno
patent: 4713571 (1987-12-01), Suzuki et al.
patent: 4727276 (1988-02-01), Izukawa et al.
English Extract from "Lexikon der Elektronik", O. Neufang (Hrsg.), p. 452, 1983.

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