Control apparatus for vibration motor

Details Control apparatus for vibration motor Control apparatus for vibration motor

1998-10-27

2000-08-22

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H02N 200

Patent

active

061077208

ABSTRACT:
This invention relates to a control apparatus for a vibration motor and, more particularly, to an apparatus capable of driving the vibration motor at high speed. This invention provides an apparatus capable of driving the motor at high speed by setting, as a driving start frequency of the motor, a frequency slightly higher than the boundary between the hysteresis and non-hysteresis ranges of the vibration motor.

REFERENCES:
patent: 4954741 (1990-09-01), Furutsu et al.
patent: 5134333 (1992-07-01), Atsuta
patent: 5231325 (1993-07-01), Tamai et al.
patent: 5247221 (1993-09-01), Atsuta
patent: 5298829 (1994-03-01), Tsukimoto
patent: 5300850 (1994-04-01), Okumura
patent: 5612598 (1997-03-01), Fukui et al.
patent: 5656881 (1997-08-01), Atsuta
patent: 5739621 (1998-04-01), Atsuta et al.

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