Two‐dimensional finite element analysis of a synthetically loaded stator in a piezoelectrically driven ultrasonic motor

• Afsin Üstündag ^[1] ; Reinhold Ludwig ^[1] ; Peter L. Levin ^[1] ; Joachim Schmidt ^[1] ; Peter Hagedorn ^[1]
  1. [1] Worcester Polytechnic Institute

     Worcester Polytechnic Institute

     City of Worcester, Estados Unidos

     
• Localización: Compel: International journal for computation and mathematics in electrical and electronic engineering, ISSN 0332-1649, Vol. 15, Nº 1, 1996, págs. 15-31
• Idioma: inglés
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• Resumen

  • Ultrasonic motors have attractive properties which compare favourably with electromagnetic motors for certain applications. Their operation is based on piezoelectrically exciting bending waves in the stator and transferring energy to the rotor via friction. Prototypes are typically constructed by trial and error; theoretical studies have proved to be difficult. Describes a two‐dimensional model for the stator of a travelling wave ultrasonic motor. The authors have developed a finite element program that is capable of modelling piezoelectric driven systems in the time domain, and their objective is to simulate the excitation of the travelling waves in the stator. They are in fact able to simulate travelling waves. Although the plane strain model cannot account for all excitation modes, they observe the elliptical motion of the material particles on the surface, implying that rotor motion can be mechanically induced.