Design and experimental evaluation of a linear piezoelectric ultrasonic motor using longitudinal transducers

Piezoelectric ultrasonic motors (PUMs) are based on the concept of driving the runner by a mechanical vibration excited on the stator via the converse piezoelectric effect. They exhibit merits of small size, simple structure, quick response, high accuracy and resolution, self-locking when power off and a lack of electromagnetic radiation. The linear PUMs become the research focus in recent years as the increase demand of the engineering application. Linear PUMs using longitudinal transducers have been shown the potential on large force and high speed by the previous studies.