一种行波超声波电机低速控制的方法  

Low speed control of traveling-wave ultrasonic motor

作　　者：张炎[1] 宋爱国[1] 王心坚[2] 胡敏强[2] 金龙[2] 

机构地区：[1]东南大学仪器科学与工程学院,南京210096 [2]东南大学电气工程学院,南京210096

出　　处：《东南大学学报（自然科学版）》2008年第3期429-433,共5页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(50277006,60605024)

摘　　要：通过有限元方法分析频率、电压、相位差3种调节方式对定子振型影响.结果表明:当驱动频率远离工作模态的谐振频率时,由于非工作模态对定子振型的影响,电机低转速运行会出现不连续现象;过低的相位差则会造成定子应力集中,影响电机寿命;在电机低转速运行时,通过电压调节则可以避免以上问题.以直径60mm行波超声波电机为例,通过构建以DSP芯片TMS320F2812为核心的控制器,进行实验验证,实现电压调节时的电机低转速控制.There are three methods in speed control of traveling-wave ultrasonic motor （TUSM）, including driving frequency, voltage and phase difference. Through the finite element method, the vi- bration model can be analyzed in different driving frequency. As a result of the non-work model＇s influence, the movement of TUSM is chopping in low speed when the driving frequency is far away from the resonance frequency of the work model. The stator stress is centralized in the excessively low phase difference. That affects the life of TUSM. In low speed control, the above question can be avoided through the voltage regulation. A 60 mm-diameter TUSM was used in this research. Using DSP （digital signal processor） chip TMS320F2812, a control system of USM （ultrasonic motor） was built. The system realizes the low speed control of TUSM by voltage regulation. The result confirms this method.

关 键 词：超声波电机 模态分析 低速控制 电压调节 

分 类 号：TM383[电气工程—电机]