Numerical Transient Analysis of a Wedge-Wave Ultrasonic Motor

This study is based on the actual drive mode of a prototype of a circular cylindrical wedge-wave ultrasonic motor (WW-USM). The contact friction model of the stator and rotor was established by the finite element software 3D ANSYS, and transient contact mechanics between the stator and the rotor were simulated. Given the actual conditions of the displacement and external force boundary conditions, the appropriate contact parameters, test the ideal convergence of the solution, obtain reasonable results, and estimate the motor performance curve of revolution speed and torque. In the ultrasonic motor prototyping of measurement characteristics, the use of piezoelectric induction, the size of the control voltage applied to the rotor pre-stressing to replace the traditional compression spring caused by uneven force of the rotor phenomenon, to avoid affecting the motor performance. The simulation results from 3D ANSYS indicate that the contact friction model between the stator and the rotor is crucial for the determination of the real constant.