摘要

超声电机是利用压电陶瓷的逆压电效应，激励弹性体产生谐振作用，把电能转换成微米级振幅的振动，再依靠定子和转子之间产生的摩擦耦合将这细微振动扩大为转子及与之相联的轴的旋转运动。与传统电磁电机相比，具有质量小、结构简单、高效率、低噪音、低速大转矩和可以直接驱动负载等特点。在航空航天、精密仪器、生物医学与许多重要领域等具有广阔的应用前景。

适应于工程上对超声电机的需要，本文设计了一种旋转型行波超声电机，主要完成了以下工作：
1.总结分析了国内超声电机技术的现状、发展及所存在的问题；
2.阐释了旋转行波超声电机的运动机理；
3.利用ANSYS软件建立了超声电机定子的数学模型，利用模型对定子的工作模态进行分析并计算，确定超声电机的定子的工作模态；
4.完成了直径超声电机的装配图和零件图的设计;
 
关键词：超声电机；模态分析；设计

Abstract

Ultrasonic Motor uses the effect of Piezoelectric from Piezoelectric ceramic, and it produce the effect of resonance excitation by the Active Materials. That the electrical energy transform to the micro-deformations. To propel the rotor and the drive shaft connected to it though the amplification of the micro-deformation of the active material that depends on friction at the interface between rotor and stator.The Ultrasonic Motor offer light mass, simply constructions, high torque density at low speed, low noise, efficient and actuate directly to the load. Ultrasonic motor in the aviation and aerospace, precision instruments, bio-medicine and a number of important areas has broad application prospects.
Projects adapted to the needs of the ultrasonic motor, In this paper, the design  a rotary traveling wave type ultrasonic motor, the main completed the following work:
1. Summary analysis of the domestic status of ultrasonic motor technology, development and the problems;
2. To explain the rotary traveling wave ultrasonic motor of the movement mechanism;
3. The use of ANSYS software, the establishment of a ultrasonic motor mathematical model, using the model of the work of the stator modal analysis and calculation to determine a stator ultrasonic motor mode of work;
4. Completed a ultrasonic motor assembly drawings and parts of the design plan;
 
Key word: Ultrasonic Motor ; Modal Analysis; Design

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