回转式微角度步距压电电动机

摘要

介绍了一种基于尺蠖运动原理的回转式微角度步距压电电动机.借助柔性机械结构,将压电陶瓷的微位移以角度方式输送出来.在结构设计方面,采用柔性铰链放大结构,夹紧器和驱动器均采用双驱动器结构,实现推-拉接力运动.配以适当的4路驱动信号,实现了压电驱动装置的单步、多步连续匀速转动.最后对样机行了实验测试.实验结果表明:所设计的回转压电电动机结构紧凑、分辨力高且运动稳定.同时,动体没有缠绕,使得驱动器可以在任意位置启动,并可在360°范围内连续匀速转动.最小步距优于3″,在160V的驱动电压下速度达到430.4″/s.%The rotatory piezoelectric moior( PZT) with micro-angle based on inchworm motion was presented.By the flexible machinery , the displacement af the piezoelectric actuators was transformed into angle.The clampers and actuators which were made of piezoelectric ceramic were both disposed in symmetrical relationship.By clamping or releasing; of clampers and extending or retracting of actuators ,it could achieve a kind of push-pull relay movement.In this way, the movement of platform is smooth and continuous.With the proper four-channels driving signals, the motor is moved linearly with single step or multi-step.The performances of the motor are tested through experiments.The results show that the motion of the motor is linear.The moving speed can reach 430.4"/s at the voltage of 160 V and the minimal step is less than 3".