摘要
提出了一种新型惯性式直线超声压电电机。该电机利用压电晶体的逆压电效应和惯性位移原理,由定子的轴向变形,通过摩擦力的作用,以惯性位移的形式传递运动。它由两部分组成,定子由具有位移放大功能的压电复合换能器和轴组成,动子为一带有缺口和环形凹槽的环。分析了该电机的工作原理,并通过仿真和实验相结合的方法分析了两种激励方式对电机性能的影响。实验结果表明:样机采用方波驱动比采用锯齿波驱动的效果好;在采用方波驱动信号驱动时,样机的最大空载速度可达到11mm/s,最大输出力达到0.5N。
A novel inertial linear ultrasonic piezoelectric motor is developed,which can transfer motion through friction in the form of inertial displacement by combining the converse piezoelectric effect and the principle of inertial displacement of piezoelectrical crystal. This motor is composed of a stator and a mobile element. The stator contains a displacement enlargement element, a multilayer piezoelectric actuator and a shaft and the mobile element is a ring with a gap and an annular flute. In this paper, the running principle of the motor is investigated in detail and the effects of two exciting modes on the performance of the motor is analyzed by the simulation and the experiment synchronously. Experimental results show that the excited effect of square wave signal on this motor is better than that of saw-tooth wave signal. The no-load speed of a prototype achieves 11 mm/s and the largest thrust achieves 0.5 N in operation voltage of 50 V and driving frequency of 80 kHz.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2008年第12期2371-2377,共7页
Optics and Precision Engineering
基金
Supported by the National Natural Science Foundation of China(No.50735002)
关键词
超声压电电机
惯性式直线电机
激励方式
位移放大
ultrasonic piezoelectric motor
inertial linear motor
exciting mode
displacement enlargement
