Vibration wave driven motor apparatus

Details Vibration wave driven motor apparatus Vibration wave driven motor apparatus

1991-01-07

1992-10-20

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310 51, 310316, H01L 4108

Patent

active

051573008

ABSTRACT:
This specification discloses a vibration wave driven motor in which frequency signals differing in phase from each other are applied to an electro-mechanical energy conversion element on a vibration member to thereby form a travelling vibration wave and a movable member is driven by the travelling vibration wave. The value of a factor which determines the natural frequency of the resonance system of the motor including a driven member when the driven member is driven by the motor or the frequency of wow-flutter is set so that the frequency of wow-flutter may not coincide with the natural frequency, thereby minimizing the unnecessary vibration of the driven member.

REFERENCES:
patent: 4743788 (1988-05-01), Takagi et al.
patent: 4914337 (1990-04-01), Takagi
patent: 5004964 (1991-04-01), Katoaka et al.
patent: 5032753 (1991-07-01), Yamaguchi et al.

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