双定子旋转型超声电机定转子接触分析与仿真

发布时间：2018-07-30 06:32

【摘要】：超声电机是一种新型电机,其原理是利用压电陶瓷的逆压电效应,通过激励电压的作用使定子产生振动,之后再通过定、转子间的摩擦力,实现电能到机械能的转换,使转子产生定向的转动。它具有结构简单、低速大转矩、响应速度快、不受磁场干扰等优点。在工业控制、轿车电器、计算机、智能机器人和航空航天领域有着广泛的应用前景。本文通过有限元分析方法,基于本实验室研发的双定子旋转型行波超声电机,建立定、转子有限元接触模型,对电机的径向滑移现象、速度和输出转矩等进行了研究。具体内容如下:首先,针对旋转型行波超声电机的工作原理、结构特点及应用进行了系统地介绍,根据超声电机目前存在的问题引出本课题,并对双定子旋转型行波超声电机和定、转子接触模型的研究现状进行了综述。其次,深入探讨了双定子旋转型行波超声电机的运行机理,并系统的介绍了压电陶瓷的逆压电效应、压电参数、压电方程和振动模态等。再次,以直径为60mm的超声电机定子为研究对象,应用有限元软件ANSYS10.0对其进行了模态分析、谐响应分析和瞬态分析,得到了定子振动状态下的频率、振型、幅频特性和电机的启动特性。最后,建立了双定子旋转型行波超声电机定、转子有限元接触模型,分析了两个定子中产生不同相位的行波对径向滑移现象的影响;并对电机转子进行了柔性设计,与刚性转子时电机的转矩-转速特性进行了对比,以体现柔性转子的优势;之后与传统超声电机进行了性能的比较,仿真结果表明双定子旋转型行波超声电机在转矩性能方面有很大的提升。
[Abstract]:Ultrasonic motor is a new type of motor. Its principle is to use the inverse piezoelectric effect of piezoelectric ceramics to make the stator vibrate through the action of excitation voltage, and then through the friction between stator and rotor to realize the conversion of electric energy to mechanical energy. Cause the rotor to produce a directional rotation. It has the advantages of simple structure, low speed and large torque, fast response speed and no interference from magnetic field. In industrial control, car appliances, computers, intelligent robots and aerospace has a wide range of applications. In this paper, based on the double stator rotary traveling wave ultrasonic motor developed by our laboratory, the finite element contact model of stator and rotor is established, and the radial slip phenomenon, velocity and output torque of the motor are studied by the finite element analysis method. The specific contents are as follows: firstly, the working principle, structural characteristics and application of rotary traveling wave ultrasonic motor are introduced systematically. The research status of double stator rotating traveling wave ultrasonic motor, stator and rotor contact model is reviewed. Secondly, the operating mechanism of rotary traveling wave ultrasonic motor with double stator is discussed, and the inverse piezoelectric effect, piezoelectric parameters, piezoelectric equation and vibration mode of piezoelectric ceramics are introduced systematically. Thirdly, taking the stator of ultrasonic motor with diameter of 60mm as the research object, the modal analysis, harmonic response analysis and transient analysis of the stator are carried out by using the finite element software ANSYS10.0, and the frequency and mode shape of the stator under vibration state are obtained. Amplitude and frequency characteristics and motor startup characteristics. Finally, the finite element contact model of stator and rotor of double stator rotating traveling wave ultrasonic motor is established, and the influence of traveling wave with different phase on radial slip phenomenon is analyzed, and the flexible design of motor rotor is carried out. In order to reflect the advantages of flexible rotor, the characteristics of torque and speed of motor are compared with that of rigid rotor, and the performance of ultrasonic motor is compared with that of traditional ultrasonic motor. The simulation results show that the torque performance of double stator rotary traveling wave ultrasonic motor is greatly improved.
【学位授予单位】：集美大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM35

【参考文献】