温度对超声波电动机起动阶段位移分辨率的影响  

Study on Temperature Effect on Displacement Resolution of Ultrasonic Motor at Startup

作　　者：郑伟[1] 黄伟彬[1] 罗敏峰[1] 

机构地区：[1]福建工程学院,福州350118

出　　处：《微特电机》2017年第8期17-19,23,共4页Small & Special Electrical Machines

基　　金：国家自然科学基金项目(51275228)

摘　　要：以微幅振动经摩擦驱动的超声波电动机,由于自身发热的作用,导致定子振动特性发生变化,进而对其位移分辨率产生显著影响。从超声波电动机用压电元件特性出发,分析了特性波动的因素。应用单片机作为控制器,测试了运行不同阶段温度下旋转型行波超声波电动机的位移分辨率。研究发现:在起动阶段,超声波电动机本体温度变化对压电元件性能影响是非线性的,它是超声波电动机分辨率波动的主要因素之一,为在起动阶段具有高分辨率的超声波电动机设计提供依据。Ultrasonic motors were driven by micro vibration. Due to self-heating and ambient temperature, temperature leads to changes in the vibration characteristics of the stator. The stator vibration had a significant influence on displace- ment resolution. The start-up stability was analyzed focus on piezoelectric element. Single chip computer was used as con- troller, displacement resolution of the rotary traveling wave ultrasonic motor was tested at different temperatures. Fluctua- tions of resolution were decreased by using feed-forward control method. Research shows that piezoelectric element is one of the main factors affecting the performance of ultrasonic motor resolution in the start-up phase. The performance of the pie- zoelectric element is non-linear at different temperature.

关 键 词：行波超声波电动机 位移分辨率 温度 压电元件 

分 类 号：TM359.9[电气工程—电机]