Novel piezoelectric rotary motor on the basis of synchronized switching control

Liangguo He; Yong Zhang; Yong Wang; Xinyu Li; Jian Chen; Xiaoyong Zhao; Yuge Dong; Xinfang Ge

doi:10.1063/5.0013885

Novel piezoelectric rotary motor on the basis of synchronized switching control

Rev Sci Instrum. 2020 Sep 1;91(9):095004. doi: 10.1063/5.0013885.

Authors

Liangguo He¹, Yong Zhang¹, Yong Wang¹, Xinyu Li¹, Jian Chen¹, Xiaoyong Zhao¹, Yuge Dong¹, Xinfang Ge¹

Affiliation

¹ School of Mechanical Engineering, Hefei University of Technology, Hefei, Anhui 230009, China.

PMID: 33003781
DOI: 10.1063/5.0013885

Abstract

A novel piezoelectric rotary motor (PRM) on the basis of synchronized switching control was designed, fabricated, and tested to achieve high speed, high efficiency, and high torque. The new motor mainly consists of a vibrator working in the resonance state as the driving element of the PRM and a clutch working in the quasi-static state to control the shaft for unidirectional rotation. The finite element method software COMSOL Multiphysics 5.4 was used to design the structure of the motor and determine the feasibility of the design mechanism of the PRM. Moreover, an experimental setup was built to validate the working principles and evaluate the performance of the PRM. The prototype motor outputted a no-load speed of 7.21 rpm and a maximum torque of 54.4 N mm at a vibrator driving voltage of 120 V_p-p and a clutch driving voltage of 200 V_p-p. The motor achieved a net efficiency of 15.6% under the preload torque of 3 N mm. The average stepping angle of the motor with no-load was 0.068°, when the voltages applied to the clutch and the vibrator were 200 V_p-p and 120 V_p-p, respectively, with the frequency of 512 Hz.