OSCILLATORY WAVE DRIVE DEVICE AND OPTICAL APPARATUS

An oscillatory wave drive device has an oscillatory wave driving unit having an electromechanical energy conversion element having drive phases and a detection phase, a diaphragm (13), and a rotor (725c), in which a traveling wave is generated on the surface of the diaphragm (13) of the electromecha...

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Bibliographische Detailangaben
Hauptverfasser:	Koyama, Shinya, Ifuku, Toshihiro, Furuta, Tatsuo, Uebayashi, Akira
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR ELECTRICITY GENERATION OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS
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Beschreibung
Zusammenfassung:	An oscillatory wave drive device has an oscillatory wave driving unit having an electromechanical energy conversion element having drive phases and a detection phase, a diaphragm (13), and a rotor (725c), in which a traveling wave is generated on the surface of the diaphragm (13) of the electromechanical energy conversion element to drive the rotor (725c), and the driving speed of the rotor (725c) is controlled based on a signal of the phase difference detecting unit. In the oscillatory wave drive device, a detection phase voltage step-down unit and a drive phase voltage step-down unit each containing a resistance voltage dividing circuit having at least two resistors are provided and the voltage dividing ratio in the resistance voltage dividing circuit of the detection phase voltage step-down unit is lower than 1/1 and higher than 1/20.