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The Scientific World Journal
Volume 2013 (2013), Article ID 854126, 9 pages
Research Article

Torque for an Inertial Piezoelectric Rotary Motor

Mechanical Engineering Institute, Yanshan University, Qinhuangdao 066004, China

Received 26 September 2013; Accepted 24 November 2013

Academic Editors: G. Carbone and O. D. Makinde

Copyright © 2013 Jichun Xing and Lizhong Xu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


For a novel inertial piezoelectric rotary motor, the equation of the strain energy in the piezoceramic bimorph and the equations of the strain energy and the kinetic energy in the rotor are given. Based on them, the dynamic equation of the motor is obtained. Using these equations, the inertial driving torque of the motor is investigated. The results show that the impulsive driving torque changes with changing peak voltage of the excitation signal, the piezoelectric stress constant, the thickness of the piezoceramic bimorph, and the rotor radius obviously. Tests about the motor torque are completed which verifies the theory analysis here in. The results can be used to design the operating performance of the motor.