【摘要】 为改善现有螺纹直线超声电动机定子的结构刚度，降低谐振频率，提高电机输出力，设计了电机定子的结构并进行实验研究。电机由开槽的定子基体、螺纹动子和4片压电陶瓷组成，采用定子的两个三阶面内弯曲模态实现驱动。利用有限元软件分析定子内螺纹开槽宽度对模态频率的影响，同时进行结构动力学分析，得到定子驱动点的位移响应和运动轨迹。试制样机，搭建机械特性测试平台。实验结果表明：电机能够在较宽的频率范围内运行，电机的最佳工作频率75.2 kHz,最大速度为0.59 mm/s,最大为输出力1.4 N,比优化前分别提高了31.1%和16.7%。更多还原

【Abstract】 In order to improve the structural stiffness of the stator of the existing threaded linear ultrasonic motor, reduce the resonant frequency and increase the output force of the motor, the stator structure of the motor was designed and experimental research was carried out. The motor was composed of a slotted stator matrix, a threaded motor and four pieces of piezoelectric ceramics, which were driven by two third-order in-plane bending modes of the stator. The finite element software was used to analyze the influence of the slot width of the stator internal thread on the modal frequency, and the structural dynamics analysis was carried out to obtain the displacement response and motion trajectory of the stator driving point. Trial-produced a prototype and built a test platform for mechanical characteristics. The experimental results show that the motor can run in a wide frequency range, the best working frequency of the motor is 75.2 kHz, the maximum speed is 0.59 mm/s, and the maximum output force is 1.4 N, which is 31.1% and 16.7% higher than that before optimization.更多还原