Here,an one-end hinged V-shape linear ultrasonic motor was designed to find a stator structure with a better output efficiency and being more suitable for miniaturization.First of all,using a finite element software,the influences of parameters of the stator structure on modal consistency and amplitudes at the driving foot were analyzed.The optimization design for the stator structure was conducted based on the sensitivity analysis of structural parameters.Then,three motors using stators with different angles 45 °,60° and 90°,respectively were fabricated,and Tests for mechanical characteristics of the motors were performed.Test results indicated that compared with the original U-shape motor,the modal consistency of the V-shape motor is better,and the output speed and out put force are greatly improved;when the angle is 90°,the excitation voltage is 300 Vpp,and the preload is 40 N,the motor's no-load speed rises by 66.8％ and its load capacity rises by 55％,the maximum no-load speed reaches 784 mrn/s,the maximum out put force reaches 14 N,and the thrust weight ratio is 70.The study showed that the integrated design of clamped elements and stator and the oneend hinged clamping mode can simplify the motor structure,and be suitable for the miniaturization of linear ultrasonic motors;when the V-shape stator angle is 90°,the performance of comprehensive output and the stability of the motor are better.%设计了一种一端铰支的V型直线超声电机,旨在找到一种输出效率更高、更利于小型化的定子结构.利用有限元软件分析了定子不同结构参数对模态一致性和驱动足处振幅的影响规律;基于结构参数的灵敏度的分析,对定子结构进行了优化设计.制作了45°、60°和90°三种不同角度的定子,并开展了电机机械特性的实验研究;实验结果表明,相对原有的U型电机,V型电机的模态一致性更好,输出速度和输出力有很大提高.在夹角为90°、激励电压为300Vpp、预压力为40 N时,电机空载速度提升了66.8％,负载能力提升了55％,最大空载速度达到784 mm/s,最大输出力达到14 N,推重比达70.研究表明:夹持元件与定子一体化设计和一端铰支的夹持方式简化了电机的结构,有利于直线超声电机的小型化;V型定子夹角为90°时,综合输出性能及稳定性更好.
展开▼
