Piezoelectric micromotor based on the structure of serial bending arms

Jianhua Tong, Tianhong Cui, Peige Shao, Liding Wang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

This paper presents a new piezoelectric micromotor based on the structure of serial bending arms. Serial bending arms are composed of two piezoelectric bimorphs with one end fixed and the other end free, driven by two signals of a biased square wave with a phase difference of π/2. The free end of a cantilever arm will move along an elliptic orbit so that the cantilever is used to drive a cylinder rotor. The rotor's end surface contacts the free end of the cantilever, resulting in the rotor's rotation. There are six serial bending arms anchored on the base. The driving mechanism of the micromotor is proposed and analyzed. A new micromotor prototype, 5 mm in diameter, has been fabricated and characterized. The maximum rotational speed reaches 325 rpm, and the output torque is about 36.5 μNm.

Original languageEnglish (US)
Pages (from-to)1100-1104
Number of pages5
JournalIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Volume50
Issue number9
DOIs
StatePublished - Sep 2003

Bibliographical note

Funding Information:
Manuscript received January 23, 2003; accepted April 10, 2003. This work was partially supported by the National Science Foundation, Grant No. NSF 59875009. The authors are with the MEMS Research Center, Dalian University of Technology, Dalian, Liaoning 116023, P. R. China. T. Cui is also with the Institute for Micromanufacturing, Louisiana Tech University, Ruston, LA 71272 (e-mail: tcui@coes.latech.edu).

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