Development of an Ultrasonic Motor Based on a Piezoelectric Ceramic Sandwiched between Two Laminate Composite Plates
Ultrasonic motors are of great interest since their operation is not affected by a magnetic field. On this work the development of a prototype of a smart ultrasonic motor and its characteristics will be presented. The stator of the motor is formed by a cantilever made of PZT ceramic plate sandwiched between two unidirectional CFRP composite sheets. The composite sheets are oriented to 45º and -45º in the longitudinal direction. By application of a sinusoidal electric field to the piezoelectric ceramic plate, it vibrates. The anisotropy of the CFRP composite sheets induces an expansion/torsion movement. This effect is transformed into rotation by friction. The study of adequate voltages and frequencies of the applied electric field allows the optimization of the rotating motor performance.
Paula Maria Vilarinho
A. Basílio et al., "Development of an Ultrasonic Motor Based on a Piezoelectric Ceramic Sandwiched between Two Laminate Composite Plates ", Materials Science Forum, Vols. 514-516, pp. 221-224, 2006