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Modeling of Piezoelectric Traveling Wave Rotary Ultrasonic Motors with the finite volume method.

机译：压电行波旋转超声波电动机的有限体积建模。

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摘要

In 1983 Toshiiku Sashida developed a new motor concept called Piezoelectric Traveling Wave Rotary Ultrasonic Motor (PTRUSM). The advantages of these motors include high torque at low speed, absence of a generated magnetic field, and high potential for miniaturization. Unfortunately PTRUSMs have some disadvantages that limit the areas of applications for these types of motors. The disadvantages are a short operating life (about 1000 hours), small output power, and the need of a complex motor controller.;On one hand, these motors have been used in satellites, mobile phones, photocopiers, robotic arms, telescopes, automobiles, and camera autofocusing. On the other hand, the use of the PTRUSM is still limited in its applications because of the previously mentioned disadvantages of these motors.;Modeling of the PTRUSM is a current challenge because the existing models of the motor are just focused in describing the behavior of certain parts of the motor, or the models have several assumptions that degrade the accuracy of these models. There is no accurate complete model of the PTRUSM capable of being implemented in a model-based control strategy to operate these motors.;This dissertation presents a complete and accurate mathematical model of the PTRUSM. The motivation of this work was the need of a complete and accurate model of the motor capable of being used as the backbone of a model-based control strategy.;A 2D model of the motor is presented. The PTRUSM stator is modeled using a finite volume discretization. Two models of the PTRUSM stator were proposed: a static and a dynamic one. A simple model of the rotor with the capability of being coupled with the stator model was developed as well.;The stator and rotor models are coupled to model the stator-rotor contact interface of the motor. Two algorithms were prosed to model the contact between stator and rotor. These algorithms provide the contact zone width, height, the normal force distribution, and the breaking and driving contact zones; these parameters define the horizontal rotor velocity.;The torque-speed characteristic of the USR60 is calculated with the proposed model. The results of the model are compared versus the real torque-speed of the motor. It was observed that this novel model accurately reflects the most important characteristic of the PTRUSM.
机译：1983年，Tashiiku Sashida开发了一种新的电机概念，称为压电行波旋转超声电机（PTRUSM）。这些电动机的优点包括低速时的高转矩，不产生磁场以及小型化的高潜力。不幸的是，PTRUSM具有一些缺点，限制了这些类型的电机的应用领域。缺点是使用寿命短（约1000个小时），输出功率小以及需要复杂的电动机控制器。一方面，这些电动机已用于卫星，移动电话，复印机，机械臂，望远镜，汽车中以及相机自动对焦。另一方面，由于前面提到的这些电动机的缺点，PTRUSM的使用仍然受到限制。; PTRUSM的建模是当前的挑战，因为现有的电动机模型仅专注于描述电动机的行为。电动机的某些部分或模型具有使这些模型的准确性下降的几个假设。目前还没有一种精确的完整的PTRUSM模型可以在基于模型的控制策略中实现来操作这些电机。本论文提出了一个完整而准确的PTRUSM数学模型。这项工作的动机是需要一个完整且准确的电动机模型，该模型能够用作基于模型的控制策略的骨干。提出了电动机的2D模型。使用有限体积离散化对PTRUSM定子进行建模。提出了PTRUSM定子的两种模型：静态模型和动态模型。还开发了具有与定子模型耦合的能力的转子的简单模型。定子和转子模型耦合以对电动机的定子-转子接触界面进行建模。提出了两种算法来建模定子和转子之间的接触。这些算法提供了接触区的宽度，高度，法向力分布以及断开和驱动接触区。这些参数定义了水平转子的速度。用所提出的模型计算了USR60的转矩-速度特性。将模型的结果与电动机的实际转矩速度进行比较。据观察，这种新颖的模型准确地反映了PTRUSM的最重要特征。

著录项

  • 作者

    Renteria Marquez, Ivan Arturo.;

  • 作者单位

    The University of Texas at El Paso.;

  • 授予单位 The University of Texas at El Paso.;
  • 学科 Electrical engineering.;Mechanical engineering.;Applied mathematics.
  • 学位 Ph.D.
  • 年度 2016
  • 页码 146 p.
  • 总页数 146
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 语言学;
  • 关键词

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