Research on High Speed Piezoelectric Motor with Eccentric Rotor Which Speed Is Equal to the Driving Frequency

doi:10.3901/JME.2022.15.233

Abstract

Abstract: The existing piezoelectric motors mainly use frictional coupling to achieve motion output and continuous rotational(linear) motion by accumulating small angles(displacements), which is difficult to apply to high speed demand situations.A piezoelectric motor with the same speed and frequency is proposed, using bearings to feed the energy from the forced stator vibration into the eccentric rotor, while the stator vibrates for one cycle and the rotor rotates for one week, thus realizing the high speed output of the piezoelectric motor.Proposes to transfer part of the mass of the rotor into the stator to increase the speed.The dynamics of the piezoelectric motor before and after mass transfer is established, and the vibration transfer law and energy relations are analyzed.Two piezoelectric motor prototypes are built with or without mass transfer, and the speed characteristics of both prototypes are tested experimentally.The results show that the maximum output speed of the motor is further increased after mass transfer, with a maximum output speed of 11 460 r/min, which is 25.7% higher than the speed before mass transfer.The motor is expected to be used in flywheel energy storage system, high-speed centrifugal filtration system and other applications requiring high speed motion.

Key words: piezoelectric motor, forced vibration, high speed, quality transfer, phase adjustment

CLC Number:

TH703

PAN Qiaosheng, ZHAO Mingfei, LI Chen, HUANG Ziliang, CHEN Liwei, WANG Ya. Research on High Speed Piezoelectric Motor with Eccentric Rotor Which Speed Is Equal to the Driving Frequency[J]. Journal of Mechanical Engineering, 2022, 58(15): 233-242.

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