A small linear ultrasonic motor utilizing longitudinal and bending modes of a piezoelectric tube

Author

Mingsen Guo ; Song Pan ; Junhui Hu ; Chunsheng Zhao ; Shuxiang Dong

Author_Institution

Nat. Defense Key Lab. of Precision Drive Technol., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China

Volume

61

Issue

4

fYear

2014

fDate

Apr-14

Firstpage

705

Lastpage

709

Abstract

A small linear ultrasonic motor which consists of a piezoelectric ceramic Pb(Zr,Ti)O₃ (PZT) tube (outside diameter 5 mm, inside diameter 3 mm, length 15 mm, acts as stator) and a shaft (acts as slider) has been developed. The outer surface electrode of the PZT tube is divided into 4 parts to excite longitudinal-bending (L₁-B₂) modes, which could be then used to produce linear motion. The motor shows a high power (force) density. It has a no-load speed of 0.14 m/s, a stall force of 0.3 N, and a maximum output power of 9.3 mW under an applied voltage of 100 Vpp. The method for further improving the performance has been discussed. The proposed motor can be further miniaturized because of its simple structure, and it has potential to be applied to medical microrobots, endoscopes, or micro laparoscopic devices, etc.

Keywords

linear motors; piezoceramics; ultrasonic motors; PZT; bending mode; linear ultrasonic motor; longitudinal mode; piezoelectric ceramic; piezoelectric tube; power 9.3 mW; size 15 mm; size 3 mm; size 5 mm; Acoustics; Actuators; Ceramics; Electrodes; Electron tubes; Force; Stators;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/TUFFC.2014.2958

Filename

6822997