Electricity: motive power systems – Impact – mechanical shock – or vibration-producing motors
Patent
1990-04-23
1991-05-07
Ro, Bentsu
Electricity: motive power systems
Impact, mechanical shock, or vibration-producing motors
318116, 310316, H02N 200
Patent
active
050139827
ABSTRACT:
A circuit for driving an ultrasonic motor which is driven by being applied with multi-phase alternating voltages comprises: a digital oscillator for providing a signal having a frequency higher than that of said alternating voltages; a frequency divider for dividing the frequency of the output signal of the digital oscillator into a desired frequency to provide a basic clock signal; a plurality of presetting circuits, each of independently presetting a delay time for generating a plurality of delay clocks which are delayed with respect the basic clock by different delay times; a plurality of delay circuits, each connected with a respective one of the delay time presetting means for generating a plurality of different delayed clock which are delay with respect to said basic clock by different periods of delay time in accordance with the preset delay time; and voltage generators which generates multi-phase alternating voltages from the basic clock and plurality of the delayed clocks for applying the multi-phase alternating voltages upon the ultrasonic motor.
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Olympus Optical Co,. Ltd.
Ro Bentsu
Weinstein Louis
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