直线微动马达箝位超声换能器(PGUT)研究

A position-gripped ultrasonic transducer (PGUT) for linear inchworm motor

本文提出一种用于超声微动直线马达的环形三叠片压电箝位超声换能器(Position-Cripped Ultrasonic Transducer,简称:PGUT)。其原理是利用换能器的超声振动产生的表面效应,来实现直线微动马达的箝位或松位。本文给出了这种换能器的共振频率、有效机电耦合系数及实验结果。实验结果表明,PGUT 能迅速、平稳的执行箝位、松位动作,并且具有低工作电压驱动<V_有效:30-50V)的特点,这种换能器已有效的应用到直线微动马达中。

This paper reports a new piezoelectric Position-Gripped Ultrasonic Transducer (PGUT) with ring-shaped three-pile piece construction to implement an ultrasonic clamp for linear inchworm motors. It's principle is the use of surface effect of ultrasonic vibration which can cause the changes of friction force and perform the action of the position-gripped or position-lessening. It gives the resonance frequency, effective electeromechanical coupling coefficients. The experiment shows that the PGUT can perform gripping-loosening action rapidly and smoothly, and its work voltage is low (Vrms: 30-50V). The PGUT has been applied to inchworm motor effectively.