Efficiency of energy conversion by piezoelectrics

J. H. Cho; R. F. Richards; D. F. Bahr; C. D. Richards; M. J. Anderson

doi:10.1063/1.2344868

Efficiency of energy conversion by piezoelectrics

J. H. Cho, R. F. Richards, D. F. Bahr, C. D. Richards, M. J. Anderson

Electrical and Computer Engineering

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Abstract

The efficiency of energy conversion by piezoelectric devices depends upon the quality factor Q and electromechanical coupling coefficient k ². In this study the efficiency Q and k ² are measured for a piezoelectric cantilever, a piezoelectric stack, and a micromachined piezoelectric membrane. The experimental values are compared to a model which predicts efficiency at resonance in terms of k ² and Q. Results of the experiment and model are within 2% of each other.

Original language	English (US)
Article number	104107
Journal	Applied Physics Letters
Volume	89
Issue number	10
DOIs	https://doi.org/10.1063/1.2344868
State	Published - 2006

Bibliographical note

Funding Information:
The authors gratefully acknowledge the support provided by DARPA MTO's MicroPower Generation Program and the US Army SMDC under Contract No. DASG60–02–C0001.

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abstract = "The efficiency of energy conversion by piezoelectric devices depends upon the quality factor Q and electromechanical coupling coefficient k 2. In this study the efficiency Q and k 2 are measured for a piezoelectric cantilever, a piezoelectric stack, and a micromachined piezoelectric membrane. The experimental values are compared to a model which predicts efficiency at resonance in terms of k 2 and Q. Results of the experiment and model are within 2% of each other.",

author = "Cho, {J. H.} and Richards, {R. F.} and Bahr, {D. F.} and Richards, {C. D.} and Anderson, {M. J.}",

note = "Funding Information: The authors gratefully acknowledge the support provided by DARPA MTO's MicroPower Generation Program and the US Army SMDC under Contract No. DASG60–02–C0001. ",

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AU - Cho, J. H.

AU - Richards, R. F.

AU - Bahr, D. F.

AU - Richards, C. D.

AU - Anderson, M. J.

N1 - Funding Information: The authors gratefully acknowledge the support provided by DARPA MTO's MicroPower Generation Program and the US Army SMDC under Contract No. DASG60–02–C0001.

PY - 2006

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N2 - The efficiency of energy conversion by piezoelectric devices depends upon the quality factor Q and electromechanical coupling coefficient k 2. In this study the efficiency Q and k 2 are measured for a piezoelectric cantilever, a piezoelectric stack, and a micromachined piezoelectric membrane. The experimental values are compared to a model which predicts efficiency at resonance in terms of k 2 and Q. Results of the experiment and model are within 2% of each other.

AB - The efficiency of energy conversion by piezoelectric devices depends upon the quality factor Q and electromechanical coupling coefficient k 2. In this study the efficiency Q and k 2 are measured for a piezoelectric cantilever, a piezoelectric stack, and a micromachined piezoelectric membrane. The experimental values are compared to a model which predicts efficiency at resonance in terms of k 2 and Q. Results of the experiment and model are within 2% of each other.

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Efficiency of energy conversion by piezoelectrics

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