A High Power Ultrasonic Linear Motor Using a Longitudinal and Bending Hybrid Bolt-Clamped Langevin Type Transducer

TLDR: In this paper, a hybrid transducer type ultrasonic linear motor using the 1st longitudinal and the 2nd bending vibration modes of a bolt-clamped Langevin type transducers was proposed and studied for accomplishing high mechanical output.

Abstract: A hybrid transducer type ultrasonic linear motor using the 1st longitudinal and the 2nd bending vibration modes of a bolt-clamped Langevin type transducer has been proposed and studied for accomplishing high mechanical output The longitudinal vibration generates the mechanical driving force and the bending vibration controls the frictional force To obtain large vibration amplitude and large mechanical output, a method of tuning the longitudinal resonance frequency to the bending one was investigated using finite element simulations, and demonstrated experimentally To avoid magnetic interaction, we employed phosphor bronze for the bolt of the transducer The prototype motor achieved the no-load velocity of 047 m/s and the maximum output mechanical force of 92 N