Abstract
This paper proposes an L-shaped piezoelectric motor consisting of two piezoelectric bimorphs of different lengths arranged perpendicularly to each other. The coupling of the bending vibration mode of the bimorphs results in an elliptical motion at the tip. A detailed finite element model was developed to optimize the dimensions of bimorph to achieve an effective coupling at the resonance frequency of 246 Hz. The motor was characterized by developing rotational and linear stages. The linear stage was tested with different friction contact surfaces and the maximum velocity was measured to be 12 mm/s. The rotational stage was used to obtain additional performance characteristics from the motor: maximum velocity of 120 rad/s, mechanical torque of 4.7 × 10 -5 N·m, and efficiency of 8.55%.
| Original language | English (US) |
|---|---|
| Article number | 6138731 |
| Pages (from-to) | 98-107 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control |
| Volume | 59 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2012 |
| Externally published | Yes |
Bibliographical note
Funding Information:Manuscript received June 13, 2011; accepted october 11, 2011. The authors gratefully acknowledge financial support from the national Institutes of Health. The authors are with the center for Energy Harvesting Materials and systems (cEHMs), Virginia Tech, Blacksburg, Va (e-mail: spriya@ vt.edu). digital object Identifier 10.1109/TUFFc.2012.2160