Driving apparatus for driving plurality of vibration type motors

Details Driving apparatus for driving plurality of vibration type motors Driving apparatus for driving plurality of vibration type motors

1998-10-27

2000-07-04

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H02N 200

Patent

active

060843349

ABSTRACT:
This invention relates to an apparatus for simultaneously driving a plurality of vibration type motors. The frequency of a cyclic signal at which the motors exhibit the same speed is detected from the driving characteristics obtained upon application of the cyclic signal to each motor. When the motors are simultaneously driven, a cyclic signal having the detected frequency for each motor is applied to each motor to make the speeds of the motors equal to each other.

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Patent Abstracts of Japan, vol. 10, No. 209 (E-421) [2265], Jul. 22, 1986 & JP-A-61-48300 (Olympus Optical Co.), Mar. 8, 1986.
Patent Abstracts of Japan, vol. 10, No. 209 (E-421) [2265], Jul. 22, 1986 & JP-A-61-48299 (Olympus Optical Co.), Mar. 8, 1986.

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