This paper presents a single-phase drive-type ultrasonic motor using an annular plate vibrating in nonaxisymmetric vibration mode. The electrode of vibrator is divided into two parts. One electrode is used a driving electrode, the other is the floating electrode. By exchanging the terminals from the two electrodes, a slider moves into two directions. By measurements of vibration velocity on circumferential surface of the vibrator, it was confirmed that the operations were caused by the change of vibration mode. A construction and load characteristics of the trial motor are shown.
電極の開放・短絡の効果を利用する可逆動作可能な単相駆動超音波モータの試作
symjspe2009A_861_2009.pdf
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