Vibration wave driven motor

Details Vibration wave driven motor Vibration wave driven motor

1991-04-02

1992-07-07

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4108

Patent

active

051285800

ABSTRACT:
In a vibration wave driven motor, an elastic body of an elliptic shape is provided where different degrees of stiffness or rigidity are available with the arcuate portions and the straight portions, and the ratio between the distortion energy and the vibration energy that part in the generation of the natural frequency for the A vibration mode is arranged virtually equal to that ratio for the B vibration mode, thus enabling the matching of frequencies for both A and B modes.

REFERENCES:
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patent: 4672256 (1987-06-01), Okuno et al.
patent: 4692652 (1987-09-01), Seki et al.
patent: 4723129 (1988-02-01), Endo et al.
patent: 4739212 (1988-04-01), Imasaka et al.
patent: 4740796 (1988-04-01), Endo et al.
patent: 4786836 (1988-11-01), Tokushima
patent: 4978882 (1990-12-01), Kitani
patent: 5041750 (1991-08-01), Kitani

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