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Patent Searching and Data


Title:
ULTRASONIC MOTOR
Document Type and Number:
Japanese Patent JPH053688
Kind Code:
A
Abstract:

PURPOSE: To realize relatively stable operation of ultrasonic motor even upon fluctuation of frequency in driving circuit due to variation of temperature or the like.

CONSTITUTION: A piezoelectric oscillator 1 is brought into contact, at the opposite ends thereof, with the outer peripheral face of a rotary shaft. The piezoelectric oscillator 1 is provided with four electrodes 15a, 15a, 15b, 15b which are applied with voltages from AC power supplies 16, 17. One 15b of the diagonally connected electrodes is applied with a voltage Vosincut from the power supply 16 whereas the other electrode 15a is applied with a voltage Vocoscut from the power supply 17.


Inventors:
UMEDA HIDENOBU
Application Number:
JP1991000177383
Publication Date:
January 08, 1993
Filing Date:
June 21, 1991
Export Citation:
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Assignee:
OMRON TATEISI ELECTRONICS CO
International Classes:
H02N2/00; H01L41/09; (IPC1-7): H02N2/00
Attorney, Agent or Firm:
中野 雅房