Electrode design of multilayered piezoelectric transducers for longitudinal-bending ultrasonic actuators

Acoustical Science and Technology

Mikio Takimoto²  Masahiro Takano¹  Kentaro Nakamura³ 

[1]Industrial Research Institute of Ishikawa

[2]Nikko Company

[3]Precision and Intelligence Laboratory, Tokyo Institute of Technology

关键词: Ultrasonic motor;    Linear motor;    Multilayered transducer;   

DOI  :  10.1250/ast.32.100

学科分类：声学和超声波

来源: Acoustical Society of Japan

【 摘 要 】

References(14)Cited-By(11)To improve the controllability of ultrasonic linear motors in the longitudinal-bending mode, we have developed a multilayered transducer with independent electrode sets for the first longitudinal mode and the second bending mode. Since the vibration components are controlled independently by the transducer, it is possible to change only the driving vibration component with the component for friction control kept constant. The optimal shape and area of the electrodes in terms of efficiency were investigated analytically and experimentally. It was confirmed that an electrode shape in accordance with the mode strain contour gave a large output and that an optimum electrode area existed. The transducer with an optimal electrode pattern exhibited an efficiency improvement of approximately 10% and a 30% reduction of the temperature rise during motor operation.

【 授权许可】

Unknown