A novel linear ultrasonic motor with dual sliders

Abstract

A novel linear ultrasonic motor with dual sliders using the first bending vibration mode of the stator as the working mode has been studied in this paper. The dual sliders are composed of an upper slider and a lower slider to provide dual outputs synchronously. When the two sliders are connected together, a combined slider of dual sliders can be formed to provide greater output. In order to drive the upper and lower sliders of the dual sliders, the piezoelectric transducer (PZT) ceramics are no longer arranged on the upper and lower surfaces of the elastomer, but at the two ends of the elastomer. The PZT ceramics work in a shear vibration mode. The PZT ceramic deformation is transmitted to the stator elastomer and driving feet through the protruding structure of the elastomer, and then the dual sliders are driven. The working principle of the motor is analyzed, and the structure design of the motor is optimized by the FEM method. The motor prototype has been made. The operational characteristics of the dual sliders motor were tested when the upper slider, the lower slider, and the combined slider were used, respectively, and the feasibility of linear ultrasonic motor with dual sliders has been proved.