Liu Zhen, Fu Qianwei, Yang Peng, Dong Zhiyan, Zhang Lihua, Yao Zhiyuan
Ji Hua Laboratory, Foshan 528200, Guangdong Province, China.
HIWING Technology Academy of CASIC, Beijing 100074, China.
Ultrasonics. 2023 May;131:106965. doi: 10.1016/j.ultras.2023.106965. Epub 2023 Feb 24.
In this study, a novel miniature I-shaped linear ultrasonic motor is proposed. The motor is constructed by two rectangular piezoelectric vibrators which are mounted in parallel with the slider to make the structure look like the letter "I". The symmetric and antisymmetric modes of the motor based on the first-order flexural vibrations of the two vibrators are chosen as the working modes. The finite element method is adopted to optimize the structure and study the vibration behavior of the motor. A prototype of the proposed linear ultrasonic motor is fabricated and its mechanical characteristics are tested. The dimension of the stator is 39.8 × 17.6 × 6 mm and the weight of the prototype is only 18.2 g. The typical outputs of the prototype are maximum speed of 364 mm/s, maximum thrust of 500 g and thrust-weight ratio of 24.47. The experimental results confirm that the developed linear ultrasonic motor has the advantages of structural design and miniaturization.
本研究提出了一种新型微型I形线性超声电机。该电机由两个矩形压电振动器构成，它们与滑块平行安装，使结构看起来像字母“I”。基于两个振动器的一阶弯曲振动的电机对称和反对称模式被选为工作模式。采用有限元方法对结构进行优化并研究电机的振动特性。制作了所提出的线性超声电机的样机，并测试了其机械特性。定子尺寸为39.8×17.6×6mm，样机重量仅为18.2g。样机的典型输出为最大速度364mm/s、最大推力500g和推重比24.47。实验结果证实，所研制的线性超声电机具有结构设计和小型化的优点。
