School of Mechanical Engineering, Hefei University of Technology, Hefei, Anhui 230009, China.
Rev Sci Instrum. 2022 Mar 1;93(3):035004. doi: 10.1063/5.0085011.
A resonant-type rotating piezoelectric motor with inchworm-inertia composite impact was designed and manufactured. It mainly comprises a stator, rotor, support shaft, and frame. The motor stator includes a clamp, driver, central connecting block, preload structure, and other auxiliary mechanisms. The clamp and driver of the motor work in a resonant state. The motor structure was optimized by using the finite element software COMSOL 5.2. Through the finite element simulation analysis, the first-order bending vibration of the clamp and the driver was selected as the working mode, and the consistency of the resonance frequency coupling was optimized and adjusted. By coordinating the bending vibration of the clamp and driver in the vertical staggered direction, the clamping foot drives the rotor to realize the unidirectional continuous rotation. The motor prototype was designed and processed, while the experimental device platform was established to verify the working principle of the motor, and the comprehensive performance of the motor was analyzed and tested. When the input driving voltage was 240 V, the driving frequency was 161 Hz, and the preload torque of the motor was 6.9 N mm, the maximum no-load speed of the motor reached 3.23 rad/s and the maximum load torque reached 10.35 N mm. Under the same conditions, the maximum resolution of the motor rotation angle was 0.69°.
设计并制造了一种具有蠕动惯性复合冲击的共振式旋转压电电机。它主要由定子、转子、支撑轴和框架组成。电机定子包括夹头、驱动器、中心连接块、预紧结构等辅助机构。电机的夹头和驱动器以谐振状态工作。利用有限元软件 COMSOL 5.2 对电机结构进行了优化。通过有限元仿真分析，选择了夹头和驱动器的一阶弯曲振动作为工作模式，并对谐振频率耦合的一致性进行了优化和调整。通过协调夹头和驱动器在垂直交错方向上的弯曲振动，夹脚驱动转子实现单向连续旋转。设计并加工了电机样机，同时建立了实验装置平台，以验证电机的工作原理，并对电机的综合性能进行了分析和测试。当输入驱动电压为 240 V、驱动频率为 161 Hz、电机预紧转矩为 6.9 N mm 时，电机的空载转速最大可达 3.23 rad/s，最大负载转矩可达 10.35 N mm。在相同条件下，电机旋转角度的最大分辨率为 0.69°。
