Standing-wave ultrasonic motor rotating bidirectionally
Standing-wave ultrasonic motor rotating bidirectionally
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H02N 2/10, H02N 2/12
Yan Renbo, Chu Xiangcheng, Li Longtu
Key Words:
Standing-wave, ultrasonic motor, rotating bidirectionally
A stationary wave ultrasonic motor capable of rotation in bidirection includes stator, rotor and central shaft. On the lower end surface of the stator, each section has same polarization direction and equal intervals with partition number being equal to four times of wave length number. On the upper end surface of the stator, there is ring piece of piezoelectric ceramics and metal ring, they are connected to each other. Said metal ring possesses driving teeth arranged along circumferential direction with equal interval and with its center located on the center of polarization area. The number of teeth of the metal ring is twice as number of wavelegnth. The rotor includes friction ring piece and metal ring, they are connected to each other. The friction ring piece contacts with said teeth tightly. The central shaft incldues adjusting mechanism, bottom seat and shell. The stator is fixed on the bottom center. The ring piece is piezoelectric ceramics is connected to power source, but different section has different polarity. The invented motor has advantages of simple technique and driving style, easy adjusting, stable rotation and large output moment.

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