ABSTRACT
This study utilized ANSYS’s 3D finite element analysis software package to perform a structural dynamic analysis of a traveling wave piezoelectric motor’s cylindrical stator. The stator of the piezoelectric motor was made from piezoelectric ceramic and metal electrode paste. When the piezoelectric ceramic is excited by a time-harmonic voltage (generated when the frequency approaches that of the stator’s natural frequency), its lateral contraction would cause the stator to generate a resonance that creates bending deformation. The time harmonic voltage acts on each of the piezoelectric ceramic’s distributed electrodes to generate a traveling wave, causing the stator’s motion curve to become elliptic and causing the rotor to rotate as a result of the frictional force produced. This study had two analytical focuses, with the first being to perform a modal analysis of the cylindrical stator and to calculate the natural frequencies and mode shapes under different modes, and the second being to observe the changes in the stator’s axial displacement. The results of the numerical simulation indicated that the design of the cylindrical piezoelectric motor proposed in this study was indeed feasible.
