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Open AccessArticle

A High-Thrust Screw-Type Piezoelectric Ultrasonic Motor with Three-Wavelength Exciting Mode

1
School of Mechatronic Engineering, Changchun University of Technology, Changchun 130012, China
2
School of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
3
State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150001, China
*
Authors to whom correspondence should be addressed.
Academic Editor: César M. A. Vasques
Appl. Sci. 2016, 6(12), 442; https://doi.org/10.3390/app6120442
Received: 28 October 2016 / Revised: 1 December 2016 / Accepted: 13 December 2016 / Published: 16 December 2016
A high-thrust screw-type piezoelectric ultrasonic motor with a three-wavelength exciting mode is proposed in this paper. The motor mainly includes a stator and a screw output shaft, and the stator is composed of twelve rectangular piezoelectric plates and a hollow metal elastomer with an internal thread. The stator can be excited to generate the combined micro ultrasonic vibration mode. With this ultrasonic vibration mode, a three-wavelength traveling wave can be synthesized. The three-wavelength traveling wave is used to drive the screw output shaft by means of the frictional force between the stator and the shaft. Rotary-linear motion can be achieved without any additional conversion mechanism. Large thrust output can be easily obtained using a three-wavelength exciting mode. The exciting mode is analyzed in detail. The prototype is designed, simulated, and fabricated. A series of experiments are carried out and the results indicate that the maximum output thrust is 50.8 N at an excitation frequency and peak-to-peak voltage of 28.9 kHz and 120 Vp-p, respectively. The maximum force density is 247.8 N/kg. View Full-Text
Keywords: piezoelectric ultrasonic motor; screw driving; rotary-linear motion; high thrust; three-wavelength exciting mode piezoelectric ultrasonic motor; screw driving; rotary-linear motion; high thrust; three-wavelength exciting mode
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MDPI and ACS Style

Li, H.; Wang, L.; Cheng, T.; He, M.; Zhao, H.; Gao, H. A High-Thrust Screw-Type Piezoelectric Ultrasonic Motor with Three-Wavelength Exciting Mode. Appl. Sci. 2016, 6, 442.

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