单模态纵-弯复合直线电动机的机理与特性

发布时间：2018-03-02 21:36

本文选题：直线超声波电动机　切入点：单模态　出处：《电工技术学报》2017年05期 　论文类型：期刊论文

【摘要】：提出了一种融合一阶纵振和四阶弯曲振动模式的单模态直线超声波电动机,介绍了电动机的结构和运行机理,利用有限元方法建立了电动机定子的机电耦合模型,仿真分析了电动机定子的振动特性,确定了电动机定子工作模态和工作频率;利用弹性杆的纵振动和悬臂梁的弯曲振动理论建立了电动机驱动足椭圆运动轨迹方程,分析了激励电压相位差对电动机椭圆轨迹的影响;利用粘弹性接触机理给出了电动机的机械特性输出曲线,分析了预压力、激励电压幅值和激励频率等对电动机输出特性的影响。通过数值和仿真分析得出:单模态直线超声波电动机的工作频率为39 860 Hz,在外加激励电压Up-p=100 V时,电动机最大输出推力和空载速度分别达到19.1 N和310 mm·s~(-1)。
[Abstract]:This paper presents a single mode linear ultrasonic motor which combines the first order longitudinal vibration mode and the fourth order bending vibration mode. The structure and operation mechanism of the motor are introduced. The electromechanical coupling model of the motor stator is established by using the finite element method. The vibration characteristics of the motor stator are simulated and analyzed, the working mode and frequency of the motor stator are determined, and the trajectory equation of the motor driving foot ellipse motion is established by using the longitudinal vibration of the elastic rod and the bending vibration theory of the cantilever beam. The influence of the phase difference of excitation voltage on the elliptic track of the motor is analyzed, the output curve of the mechanical characteristics of the motor is given by using the viscoelastic contact mechanism, and the pre-pressure is analyzed. The effects of the amplitude and frequency of excitation voltage on the output characteristics of the motor are studied. Through numerical and simulation analysis, it is concluded that the operating frequency of single-mode linear ultrasonic motor is 39,860 Hz, and when the applied excitation voltage is Up-p=100 V, the operating frequency of the single mode linear ultrasonic motor is 39,860 Hz. The maximum output thrust and no-load velocity of the motor are 19.1 N and 310 mm 路s-1 respectively.
【作者单位】：浙江工商大学信息与电子工程学院;
【基金】：国家自然科学基金(51277165) 浙江自然科学基金(LY15F10001)资助项目
【分类号】：TM359.4

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