行波型旋转超声电机定转子设计及有限元分析  

Traveling Wave Rotary Ultrasonic Motor Rotor-Stator Design and Finite Element Analysis

作　　者：苏国兵 韩建超[1] 齐鑫哲 蔡毅 SU Guobing;HAN Jianchao;QI Xinzhe;CAI Yi(Chinese Academy of Space Technology, Beijing 100039, China;Mechanical Engineering Department, North China Institute of Aerospace Engineering, Langfang 065000, China)

机构地区：[1]中国空间技术研究院,北京100039 [2]北华航天工业学院机电工程学院,河北廊坊065000

出　　处：《电机与控制应用》2017年第12期100-105,共6页Electric machines & control application

基　　金：河北省研究生创新资助项目(CXZZSS20171771)

摘　　要：研究了行波型旋转超声电机定转子接触动力传递机理,完成了超声电机关键部件定子、锥柔性转子设计,建立了考虑定转子径向滑移的三维接触模型以及有限元模型,分析了超声电机定子表面质点幅频特性、谐振速度以及径向位移量与齿高之间的关系。通过比较锥柔性、柔性转子与定子接触面质点径向相对位移,阐释了锥柔性转子通过自身弹性变形能更好地贴合在定子齿表面,减少定转子间相对滑移量并能提高超声电机的输出效率。最后通过合成一个行波周期内定子表面质点的位移轨迹,验证了定子驱动转子旋转运动的方式为椭圆运动。仿真结果对行波型旋转超声电机的设计具有指导意义。Dynamic transfer mechanism of the traveling wave rotary ultrasonic motor rotor-stator＇ s contact surface was studied and the key parts stator and cone flexible rotor of ultrasonic motor were designed. Three-dimensional contact model and finite element model considering the radial sliding between the rotor and the stator were established. The relation between stator surface particle that amplitude frequency characteristics, resonance speed, radial displacement of ultrasonic motor and tooth height were analyzed. Mass point radial relative displacement of contact surface between the cone flexible rotor, flexible rotor and the stator were contrasted. The cone flexible rotor was better placed on the surface of the stator tooth through its elastic deformation was interpreted. The cone flexible rotor reduces radial slip between the stator and the output efficiency of ultrasonic motor was improved. The displacement trajectory of the stator surface was synthesized in a row wave cycle. The method of the stator mass point elliptical motion drives the rotor rotation was verified. The simulation results were great significantly to the design of rotary uhrasonic motor.

关 键 词：超声电机 定转子 径向滑移 有限元 

分 类 号：TM302[电气工程—电机]