Wang Yingzhi, Wang Liming
The State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400030, China.
Rev Sci Instrum. 2020 Apr 1;91(4):045002. doi: 10.1063/1.5129586.
In this work, a novel ultrasonic linear motor is proposed. The proposed motor has two driving feet and a simple structure. The torque applied to the motor is converted into a normal preload between the driving feet and the mover, avoiding the use of a large preloading mechanism. The vibration characteristics of the motor are studied by the finite element analysis method. Finally, the prototype is fabricated. The experimental system is established, and a series of experiments has been carried out to evaluate the performance of the motor in terms of maximum velocity and maximum output force, and the feasibility of the proposed motor is verified. The experimental results show that the maximum no-load velocities of the motor moving to the right and left are 85.2 mm/s and 76 mm/s, respectively, and the maximum output force is 1.96 N. The numerical simulation results show that the stator of the motor can be used as a displacement amplifying structure, which can effectively amplify one or two orders of magnitude deformation of the piezoelectric stack.
在这项工作中，提出了一种新型超声直线电机。所提出的电机有两个驱动脚且结构简单。施加在电机上的转矩被转换为驱动脚与动子之间的法向预载，避免了使用大型预载机构。采用有限元分析方法研究了电机的振动特性。最后，制作了样机。建立了实验系统，并进行了一系列实验以评估电机在最大速度和最大输出力方面的性能，验证了所提出电机的可行性。实验结果表明，电机向右和向左移动时的最大空载速度分别为85.2毫米/秒和76毫米/秒，最大输出力为1.96牛。数值模拟结果表明，电机的定子可作为位移放大结构，能有效放大压电叠堆一到两个数量级的变形。
