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Sensors 2018, 18(3), 809; https://doi.org/10.3390/s18030809

Optimization and Analysis of a U-Shaped Linear Piezoelectric Ultrasonic Motor Using Longitudinal Transducers

School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China
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Received: 19 January 2018 / Revised: 24 February 2018 / Accepted: 5 March 2018 / Published: 7 March 2018
(This article belongs to the Special Issue Piezoelectric Micro- and Nano-Devices)
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Abstract

A novel U-shaped piezoelectric ultrasonic motor that mainly focused on miniaturization and high power density was proposed, fabricated, and tested in this work. The longitudinal vibrations of the transducers were excited to form the elliptical movements on the driving feet. Finite element method (FEM) was used for design and analysis. The resonance frequencies of the selected vibration modes were tuned to be very close to each other with modal analysis and the movement trajectories of the driving feet were gained with transient simulation. The vibration modes and the mechanical output abilities were tested to evaluate the proposed motor further by a prototype. The maximum output speed was tested to be 416 mm/s, the maximum thrust force was 21 N, and the maximum output power was 5.453 W under frequency of 29.52 kHz and voltage of 100 Vrms. The maximum output power density of the prototype reached 7.59 W/kg, which was even greater than a previous similar motor under the exciting voltage of 200 Vrms. The proposed motor showed great potential for linear driving of large thrust force and high power density. View Full-Text
Keywords: piezoelectric ultrasonic motor; finite element method; longitudinal vibration; high power density piezoelectric ultrasonic motor; finite element method; longitudinal vibration; high power density
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Yu, H.; Quan, Q.; Tian, X.; Li, H. Optimization and Analysis of a U-Shaped Linear Piezoelectric Ultrasonic Motor Using Longitudinal Transducers. Sensors 2018, 18, 809.

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