圆环定子驻波型步进超声波电机的设计

Design on Standing Wave Type Ultrasonic Motor with Circle Stator

设计一种可调步距的圆环定子驻波型步进超声波电机,样机的工作频率为36.3 kHz,空载转速为10r.min-1,在一个周期的激励信号作用下,电机转子转过的角度为0.001 65°.利用ANSYS软件,对所设计的电机样机的圆环定子进行仿真分析,研究激励频率、输入电压和预压力对转速的影响.结果表明:电机的转速会随着激励频率的增加先增加后减小,当激励频率为36.3 kHz,达到振动体振幅的最大值;电机的转速会随着输入电压的增大先增大,当输入电压达到7 V时,对应最大转速为10 r.min-1;电机的转速会随着预压力的增加先增大,当到达最佳预压力2.7 N时,继续增大预压力电机,转速反而降低.

An adjustable step-length stepping ultrasonic motor is designed in this paper.The working frequency of the prototype is 36.3 kHz,the no-load speed is 10 r·min-1,and the turning angle of stator is 0.001 65° in a periodic excitation signal.Using ANSYS software,the simulation analysis to the circle stator of the prototype is realized,is made and the influence on speed from excitation frequency,input voltage and pre-pressure are studied.The results show that motor speed will increase first and then decrease as the excitation frequency increased and when the excitation frequency is 36.3 kHz,it will achieve the maximum amplitude of the vibration body;motor speed will increase first as the input voltage increases,when the input voltage is 7 V,the corresponding maximum speed is 10 r·min-1;motor speed will increase first with the pre-pressure increases,when the pressure reaches 2.7 N but the pressure to increase motor speed will decrease as the pre-pressure continue to increas.