Forrester, J. orcid.org/0000-0002-8102-7576, Davidson, J., Foster, M. et al. (1 more author) (2022) Circuit simulator compatible model for the ring-dot piezoelectric transformer. Journal of Microelectromechanical Systems, 32 (1). pp. 103-116. ISSN 1057-7157
Abstract
A lumped-element equivalent circuit model for the ring-dot piezoelectric transformer (PT) is derived based on a one-dimensional analysis of the radial vibration mode. Initially, equations for the magnitudes of force, vibration velocity at the boundaries of each section of the device are derived based on the piezoelectric constitutive equations and using Kirchhoff plate theory. Similarly, equations for the amplitudes of input and output currents are derived from the electric displacement field and Gauss’ law. From this analytical approach, an equivalent circuit model is developed and, using a Taylor expansion, approximated as the Mason equivalent circuit. A key contribution of this work is the development of a circuit simulator compatible model which can be used by electronic engineers, without in-depth knowledge of the underlying material science, to design ring-dot PTs for power conversion applications. The resulting model is verified against both COMSOL finite element simulations and experimental impedance measurements. Compared to COMSOL, the model estimates the resonant circuit elements to within 1% and the input and output capacitance are estimated to within 10%. Experimental results match the simulation to within 10% for most parameters, and 1% for resonant frequency.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 The Authors. This accepted manuscript version is available under a Creative Commons Attribution CC BY licence. (http://creativecommons.org/licenses/by/4.0) |
Keywords: | Piezoelectric devices; Resonant power conversion; Modelling |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 11 Nov 2022 16:32 |
Last Modified: | 25 Sep 2024 15:53 |
Status: | Published |
Publisher: | Institute of Electrical and Electronics Engineers |
Refereed: | Yes |
Identification Number: | 10.1109/JMEMS.2022.3220042 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:193167 |