A new flextensional piezoelectric ultrasonic motor - Design, fabrication and characterisation

J. T. Leinvuo; Stephen Wilson; R. W. Whatmore; M. G. Cain

doi:10.1016/j.sna.2006.04.010

A new flextensional piezoelectric ultrasonic motor - Design, fabrication and characterisation

J. T. Leinvuo, Stephen Wilson, R. W. Whatmore, M. G. Cain

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

This paper presents the techniques used for the characterisation of a new type of standing-wave piezoelectric ultrasonic motor. The motor uses a metallic flextensional amplifier, or "cymbal", to convert the radial mode vibrations of a piezoelectric ceramic disc into flexural oscillations, which are further converted to produce rotary actuation by means of an elastic fin friction drive. The motor operates on a single-phase electrical supply. A beryllium copper rotor design with three-fin configuration was adopted. The best stall torque, no load speed, transient time and efficiency for a 25 mm motor were 2 N mm, 680 rpm, 2 ms and 4.8%, respectively. The operational characteristics of the motor were evaluated by using two methods: one based on the pulley-brake principle and one on high-speed imaging. The results obtained from using these two techniques are contrasted and compared. (c) 2006 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	141-151
Number of pages	11
Journal	Sensors and Actuators A - Physical
Volume	133
Issue number	1
DOIs	https://doi.org/10.1016/j.sna.2006.04.010
Publication status	Published - 8 Jan 2007

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AB - This paper presents the techniques used for the characterisation of a new type of standing-wave piezoelectric ultrasonic motor. The motor uses a metallic flextensional amplifier, or "cymbal", to convert the radial mode vibrations of a piezoelectric ceramic disc into flexural oscillations, which are further converted to produce rotary actuation by means of an elastic fin friction drive. The motor operates on a single-phase electrical supply. A beryllium copper rotor design with three-fin configuration was adopted. The best stall torque, no load speed, transient time and efficiency for a 25 mm motor were 2 N mm, 680 rpm, 2 ms and 4.8%, respectively. The operational characteristics of the motor were evaluated by using two methods: one based on the pulley-brake principle and one on high-speed imaging. The results obtained from using these two techniques are contrasted and compared. (c) 2006 Elsevier B.V. All rights reserved.

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A new flextensional piezoelectric ultrasonic motor - Design, fabrication and characterisation

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