A Standing Wave Ultrasonic Motor Using Longitudinal Vibration Transducers
A new type standing wave ultrasonic motor is proposed in this study. In this design, three longitudinal vibration transducers are clamped on the inner side of a ring with driving teeth by screws. Bending standing wave can be generated in the ring by the longitudinal vibrations of the transducers. Thus, oblique linear simple harmonic vibrations are formed on the teeth, which can drive the rotor by frictional force. The structure and working principle of the proposed design are introduced. The motor is designed and analyzed by using FEM method. A standing wave is gained after the degeneration between the bending vibration of the ring and the longitudinal vibration of the transducer. The test results of the prototype motor verify the feasibility of the proposed design.
J. K. Liu et al., "A Standing Wave Ultrasonic Motor Using Longitudinal Vibration Transducers", Key Engineering Materials, Vols. 474-476, pp. 661-665, 2011