PMID: 16529118Mar 15, 2006Paper

Quality factor concept in piezoceramic transformer performance description

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Alex V Mezheritsky

Abstract

A new general approach based on the quality factor concept to piezoceramic transformer (PT) performance description is proposed. The system's quality factor, material elastic anisotropy, and coupling factors of the input and output sections of an electrically excited and electrically loaded PT fully characterize its resonance and near-resonance behavior. The PT efficiency, transformation ratio, and input and output power were analytically analyzed and simulated as functions of the load and frequency for the simplest classical Langevin-type and Rosen-type PT designs. A new formulation of the electrical input impedance allows one to separate the power consumed by PT from the power transferred into the load. The system's PT quality factor takes into account losses in each PT "input-output-load" functional components. The loading process is changing PT input electrical impedance on the way that under loading the minimum series impedance is increasing and the maximum parallel impedance is decreasing coincidentally. The quality-factors ratio, between the states of fully loaded and nonloaded PT, is one of the best measures of PTs dynamic performance--practically, the lower the ratio is, the better PT efficiency. A simple and effective...Continue Reading

References

Aug 2, 2001·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·T TsuchiyaH Okamura
Jul 4, 2003·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Junhui Hu
Sep 4, 2003·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Hyun-Woo JooHyun-Kyo Jung
Feb 6, 2004·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Alex V Mezheritsky
Jan 21, 2006·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Alex V Mezheritsky

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Citations

Jun 19, 2007·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Jiashi Yang

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