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http://hdl.handle.net/10397/495
| Title: | Finite element analysis on piezoelectric ring transformer | Authors: | Li, HL Hu, J Chan, HLW |
Issue Date: | 2002 | Source: | 2002 IEEE Ultrasonics Symposium : proceedings : an international symposium : October 8-11, 2002, Munich, Germany, p.1177-1180 | Abstract: | By using concentric electrode patterns, a ring-shaped transformer can be designed to operate at its high order radial extensional modes. In our previous study, a piezoelectric transformer (PT) using the third symmetric radial extensional mode was studied and characterized. A maximum efficiency, transformation ratio and power density of 92.3%, 1.9 and 14.3 W/cm³ could be achieved. In this paper, three-dimensional (3D) finite element models were built to study and analyze the vibration characteristics of the PTs using higher order modes (>3). The resonance frequencies, mean electromechanical coupling effect, and other open-circuit characteristics are simulated and compared with experimental measurements. The dimensions for the PTs using higher order radial extensional modes are optimized by FEM. The ring PT offers advantages of simple structure and small size. It has good potential in making low cost PT for low voltage applications. | Keywords: | Piezoelectric transformer Finite element method Pyroelectricity Piezoelectric materials |
Publisher: | IEEE | ISBN: | 0-7803-7582-3 | ISSN: | 1051-0117 | Rights: | © 2002 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. |
| Appears in Collections: | Conference Paper |
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