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On the Circuit Model of Piezoceramics

2132 Martin Hall, Mechanical Engineering Department, University of Maryland, College Park, MD 20742drparkch{at}umd.edu

The proper equivalent interface circuit of a piezoelectric material below ultrasonic frequency range is developed and analyzed incorporating a voltage source and a capacitor theoretically and experimentally. The emphasis is placed on the physical connection between a capacitor and a voltage source. The first model considered is of a capacitor connected in series with a voltage source. The second model consists of a capacitor connected in parallel with a voltage source. This paper presents the analyses of these two different circuit models for a piezoceramic by discussing the electric impedance and phase angle of a piezoceramic theoretically and experimentally and determines the best-fit model of a PZT to use for structural vibration applications.

Journal of Intelligent Material Systems and Structures, Vol. 12, No. 7, 515-522 (2001)
DOI: 10.1177/10453890122145302


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