双振子型直线超声电机  

Double-vibrator linear piezoelectric ultrasonic motor

作　　者：胡金云[1] 鹿存跃[2] 陈宇[1] 周铁英[1] 

机构地区：[1]清华大学物理系,北京100084 [2]浙江大学电气工程学院,杭州310027

出　　处：《清华大学学报（自然科学版）》2008年第8期1236-1239,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(50577035,10676015)

摘　　要：为提供驱动精密直线进给系统所需要的低速大力矩超声电机,提出了一种双振子型直线超声电机,该电机由2个对称的利用弯曲模态作为工作模态的摇头型振子组成,每个振子包含一个压电堆——它由4片夹心PZT-4压电陶瓷片组成。研究确定了柔性支架安装位置。然后,通过仿真计算选取该电机工作模态为三阶弯曲振动B3模态。经过模拟电机工作环境并对电机进行工作测试,可得出该电机在小预压力情况下,电压峰峰值Up-p为311V时测得最大空载速度v0为704mm/s;预压力F0为12.69N、Up-p为226V时,堵转力F为2.1N。测试结果表明该电机基本满足驱动精密直线进给系统的要求。A double-vibrator linear ultrasonic motor was designed to drive an exact linear transmission system. The motor consists of two symmetrical vibrators which use the bending modes to control the motion. Each vibrator has one piezoelectric stack consisting of four PZT-4 piezoelectric pieces with their centers all aligned along an axis. Then, the position of flexible bracket was determined. Simulations show that the motor works in B3 mode. The motor was tested on an exact linear transmission system. With low initial forces and Up-p voltage of 311 V, the maximum velocity with no load V0 was 704 mm/s. When Up-p was 226 V and the initial force F0was 12.69N, the motor had apull force F of 2.1N. Thus, the results show that the motor can be used to drive exact linear transmission systems.

关 键 词：直线超声电机 精密直线进给系统 双振子 对称结构 

分 类 号：TM922.71[电气工程—电力电子与电力传动]