The focus of this paper is to propose a contact model of a radial standing wave ultrasonic motor in order to evaluate the motor\nperformance accurately. The contact behavior between the stator and rotor is characterized by test and a continuous contact on\nthe contact interface is confirmed. A contact model describing the continuous contact is then developed with analytical method.\nThe stator vibration, the force transmission between the stator and rotor, and the output of the motor are analyzed.The impacts of\ndifferent vibration amplitudes and structural parameters on the performances of the motor are evaluated based on the proposed\nmodel. Finally, a test platform for measuring the performance of the motor is built and torque-speed curves of the motor under\ndifferent voltages are measured.The accuracy of the contactmodel is verified by comparison between measurement and calculation\nresults. The proposed model not only can be used for design and optimization of the radial standing wave ultrasonic motor but also\noffers insight into the contact mechanics of standing wave ultrasonic motors.
Loading....