CAJ | 학술논문

设计了一种小型方柱弯曲旋转压电超声电机,即摇头式压电陶瓷超声电机.该电机采用带圆孔的金属方柱作为电机的定子部分,并在方柱的4个垂直表面分别粘贴沿厚度方向极化的压电陶瓷片,其外形尺寸小于6 mm×6 mm×10 mm.利用有限元分析软件ANSYS对电机的工作模态进行了模拟计算,得到金属方柱定子的一阶弯曲振动频率为125.5 kHz;并对其工作状态进行了谐响应分析,得到X(Y)向、Z向振幅,由此计算得到定、转子之间的最优接触角,约为24.5°.采用激光多普勒测振仪(Polytec 300-F)测量了电机的振动谱特性,测得一阶弯曲振动发生在129.6 kHz处,并观察到两个节面位于全长的1/4及3/4处,实验与有限元仿真结果基本一致.讨论了不同厚度陶瓷片及金属方柱圆孔孔径大小对电机输出特性的影响,确立了小型方柱电机的尺寸设计标准.
설계료일충소형방주만곡선전압전초성전궤,즉요두식압전도자초성전궤.해전궤채용대원공적금속방주작위전궤적정자부분,병재방주적4개수직표면분별점첩연후도방향겁화적압전도자편,기외형척촌소우6 mm×6 mm×10 mm.이용유한원분석연건ANSYS대전궤적공작모태진행료모의계산,득도금속방주정자적일계만곡진동빈솔위125.5 kHz;병대기공작상태진행료해향응분석,득도X(Y)향、Z향진폭,유차계산득도정、전자지간적최우접촉각,약위24.5°.채용격광다보륵측진의(Polytec 300-F)측량료전궤적진동보특성,측득일계만곡진동발생재129.6 kHz처,병관찰도량개절면위우전장적1/4급3/4처,실험여유한원방진결과기본일치.토론료불동후도도자편급금속방주원공공경대소대전궤수출특성적영향,학립료소형방주전궤적척촌설계표준.
A novel rocking head type piezoelectric ultrasonic motor is designed. A square cylinder of bronze with a hole is used as the stator. 4 piezoelectric plates of PZT- 4 polarized in the thickness direction are bonded to the sides of the bar. The outer size of the motor is less than 6 mm×6 mm×10 mm. Finite element (FEA) of the stator has been made. It is found that the resonant frequency of first bending mode is 125.5 kHz. The working process of the motor is simulated by harmonic analysis, by which the vibration amplitude is calculated. Thus the taper angle of contact surface can be obtained. The Doppler Laser Vibrometer (Polytec 300-F) was used to measure the vibration characteristic of the ultrasonic motor. It shows that the resonant frequency of first bending mode is about 129.6 kHz, which coincides with the FEM result very well. Furthermore, the relationship between the output of piezoelectric motor and different dimensions of the structure are discussed, such as the thickness of piezoelectric ceramic, the diameter of hole in the quadrate bar. That can be useful to design and optimize the piezoelectric ultrasonic micromotor.