Driving device for vibration wave driven motor

Details Driving device for vibration wave driven motor Driving device for vibration wave driven motor

1989-05-30

1991-03-05

Budd, Mark O.

Electricity: motive power systems

Nonmagnetic motor

310316, H01L 4108

Patent

active

049980483

ABSTRACT:
There is disclosed a vibration wave driven motor, in which, when the motor is driven in a high frequency region distant from the resonance drive state, the variation of frequency is not prohibited in response to the detection of the drive state mentioned above, and the variation of frequency is prohibited in response to the detection of the drive state when the motor approaches to the resonance drive state.

REFERENCES:
patent: 4713571 (1987-12-01), Suzuki et al.
patent: 4727267 (1988-02-01), Izukawa et al.
patent: 4743788 (1988-05-01), Takagi et al.
patent: 4748365 (1988-05-01), Poupaert et al.
patent: 4794294 (1988-12-01), Shimizu
patent: 4812699 (1989-03-01), Ogawa et al.
patent: 4853579 (1989-08-01), Kawasaki et al.

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