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Technical Brief

An Electromechanical Integrated Harmonic Piezodrive System

[+] Author and Article Information
Lizhong Xu

Mechanical Engineering Institute,
Yanshan University,
438 Hebei Street West Section, Haigang, Qinhuangdao,
Hebei 066004, China
e-mail: xlz@ysu.edu.cn

Huaiyong Li

Mechanical Engineering Institute,
Yanshan University,
438 Hebei Street West Section, Haigang, Qinhuangdao,
Hebei 066004, China
e-mail: lihuaiyong@ysu.edu.cn

Contributed by the Design Innovation and Devices of ASME for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received July 19, 2012; final manuscript received December 11, 2013; published online January 10, 2014. Assoc. Editor: Diann Brei.

J. Mech. Des 136(3), 034502 (Jan 10, 2014) (4 pages) Paper No: MD-12-1364; doi: 10.1115/1.4026262 History: Received July 19, 2012; Revised December 11, 2013

An electromechanical integrated harmonic piezodrive system is proposed. The key of the proposed piezodrive system is the integration of the piezodrive principle with the harmonic drive and the movable tooth drive principles, which changes the sliding friction between the rotor and the vibrator into a rolling mesh. It can substantially increase the system's output torque, operating life, and efficiency. In this paper, the design of the drive system and its operating principles are presented. Under piezoelectric excitation, the deformation energy of the flexible ring was analyzed and the output torque of the drive system was calculated, revealing that the drive system produces a higher output torque than does a normal bar-type ultrasonic motor.

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References

Yamayoshi, Y., and Hirose, S., 1992, “Ultrasonic Motor Not Using Mechanical Friction Force,” Int. J. Appl. Electromagn. Mater., 3(3), pp.179–182.
Ueha, S., Hashimoto, Y., and Koike, Y., 2000, “Non-Contact Transportation Using Near-Field Acoustic Levitation,” Ultrasonics, 38(1), pp.26–32. [CrossRef] [PubMed]
Yang, B., and Liu, J., and Chen, D., 2006, “Theoretical and Experimental Research on a Disk-Type Non-Contact Ultrasonic Motor,” Ultrasonics, 44(3), pp. 238–240. [CrossRef] [PubMed]
Hojjat, Y., and Karafi, M. R., 2010, “Introduction of Roller Interface Ultrasonic Motor,” Sens. Actuators, A, 163(1), pp. 304–310. [CrossRef]
Oliver, B., 2000, “Harmonic piezodrive-miniaturized servo motor,” Mechatronics, 10(4), pp. 545–554. [CrossRef]
Xu, L., and Li, H., 2012, “Resonant Responses for an Electromechanical Integrated Harmonic Piezodrive System,” Przeglad Elektrotech., 88(5), pp. 79–82.

Figures

Grahic Jump Location
Fig. 1

An electromechanical integrated harmonic piezodrive system: (a) model machine, (b) movable tooth drive, and (c) vibrator. (1) Rotor; (2) rigid gear; (3) flexible ring; (4) movable tooth; (5) upper weight; (6) piezoelectric ceramics; (7) lower weight.

Grahic Jump Location
Fig. 2

The force analysis model of the flexible ring

Grahic Jump Location
Fig. 3

Output torque and its changes: (a) φ2 changes and (b) d3 changes

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