The efficiency of energy conversion by piezoelectric devices depends upon the quality factor Q, and electromechanical coupling coefficient k2. Efficiency, Q, and k2 were measured for a piezoelectric cantilever and piezoelectric stack, and compared to a model of the efficiency in terms of Q and k2. The model and experiment agree very well.
Efficiency Characterization of Piezoelectrics for Power
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Cho, JH, Raupp, JC, Hayenga, PD, Richards, RF, Bahr, DF, Richards, CD, & Anderson, MJ. "Efficiency Characterization of Piezoelectrics for Power." Proceedings of the ASME 2004 International Mechanical Engineering Congress and Exposition. Advanced Energy Systems. Anaheim, California, USA. November 13–19, 2004. pp. 17-22. ASME. https://doi.org/10.1115/IMECE2004-61739
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