Abstract
A novel linear ultrasonic motor based on d 15 effect of piezoelectric materials was presented. The design idea aimed at the direct utilization of the shear-induced vibration modes of piezoelectric material. Firstly, the inherent electromechanical coupling mechanism of piezoelectric material was investigated, and shear vibration modes of a piezoelectric shear block was specially designed. A driving point’s elliptical trajectory induced by shear vibration modes was discussed. Then a dynamic model for the piezoelectric shear stator was established with finite element (FE) method to conduct the parametric optimal design. Finally, a prototype based on d15 converse piezoelectric effect is manufactured, and the modal experiment of piezoelectric stator was conducted with laser doppler vibrometer. The experimental results show that the calculated shear-induced vibration modes can be excited completely, and the new linear ultrasonic motor reaches a speed 118 mm/s at noload, and maximal thrust 12.8 N.
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Funded by the National Basic Research Program of China (973 Program, No. 2015CB057501), the National Natural Science Foundation of China ( Nos. 50975135, 51275235), the Fundamental Research Funds for the Central Universities ( No. NJ20140024), and the Priority Academic Program Development of Jiangsu Higher Education Institutions
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Chen, C., Shi, Y., Chen, H. et al. Application of piezoelectric materials in a novel linear ultrasonic motor based on shear-induced vibration mode. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 29, 1191–1195 (2014). https://doi.org/10.1007/s11595-014-1066-5
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DOI: https://doi.org/10.1007/s11595-014-1066-5