A Study on the Rod Type Ultrasonic Motor

Abstract

This study is to explore a rod type ultrasonic motor, it can solve the traditional ultrasonic motor with a high speed, but only low torque (or low loading ability) the shortcomings. Or want to improve the traditional ultrasonic motor with high torque (or high loading ability), but speed is too low the drawback. In other words, this study is expected to perform the ultrasonic motor, hope that we can have both higher speed and higher torque of the effect (or higher loading ability), and it can be applied to drive the optical lens (or electro-mechanical systems ) or applied to toggle the slider (or linear rails ). Based on the experimental results, we found that maximum rotational speed is 200rpm under conditions of 180Vp-p, 33.7kHz and 53gw preload. And the maximum loading ability and torque is respectively 4.13kgw and 0.273Nm under conditions of 180Vp-p, 33.7kHz and 15rpm rotational speed. Under similar size and driving conditions, its rotational speed is 3.8 times that of the conventional ultrasonic motor and the loading ability is 7.0 times the conventional ultrasonic motor.