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Journal of Intelligent Material Systems and Structures
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Piezoelectric Energy Harvesting using Single Crystal Pb(Mg1/3Nb2/3)O 3-xPbTiO3 (PMN-PT) Device

Chengliang Sun

Department of Mechanical Engineering and Materials Science University of Pittsburgh, Pittsburgh, PA 15261, USA

Lifeng Qin

Department of Mechanical Engineering and Materials Science University of Pittsburgh, Pittsburgh, PA 15261, USA

Fang Li

Department of Mechanical Engineering and Materials Science University of Pittsburgh, Pittsburgh, PA 15261, USA

Qing-Ming Wang

Department of Mechanical Engineering and Materials Science University of Pittsburgh, Pittsburgh, PA 15261, USA, qmwang{at}engr.pitt.edu

We present the analytical and experimental studies of a piezoelectric energy harvesting device that can be used as a standalone energy source for powering microsensors and electronics. Single crystal piezoelectric Pb(Mg1/3 Nb2/3)O3-xPbTiO3 (PMN-PT) with large electromechanical coupling coefficient was employed for device design and fabrication in this study. An analytical model for estimating the power-harvesting performance was derived for a cantilever-mounted aluminum alloy plate with a PMN-PT device bonded near the clamped end and a proof mass at the other end. Considering the plate was subjected to both a steady-state sinusoidal vibration and a pulse impact excitation, static, and dynamic analyses were performed for device structure to achieve efficient energy harvesting. In the static analysis, the effect of geometrical dimension of piezoelectric device on the energy harvesting performance has been discussed. In the dynamic analysis, transient response of the device subjected to a pulse impact excitation was studied using a single degree of freedom system model. The resonance characteristics and the power generation capability of the device were discussed. Based on the analytical results, a cantilever device was fabricated and evaluated with sinusoidal excitation and impact excitation. The results are applicable for the structural design of piezoelectric energy harvesting devices.

Key Words: energy harvesting • piezoelectric • piezoelectric single crystal.

This version was published on March 1, 2009

Journal of Intelligent Material Systems and Structures, Vol. 20, No. 5, 559-568 (2009)
DOI: 10.1177/1045389X08097385
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