Study on piezoelectric ceramic/metal composite thin plate of driving stator for travelling-wave motor

In this paper the solution of general problems of the bending vibration of the thin piezoelectric ceramic/metal composite plate of a driving stator for a travelling-wave motor was analysed. Considering the electromechanical coupling effect, the concepts of generalized stress and strain and generalized piezoelectric equations were introduced. The relation of generalized stress and strain, satisfying the differential motion equation of the thin composite plate were derived. Using the finite element method, the vibration mode of the composite plate for a travelling-wave motor was calculated, considering the electromechanical coupling. A theoretical basis was provided for optimizing the design of ultrasonic motors.