Optimization of Piezoelectric Electrical Generators Powered by Random Vibrations

This paper compares the performances of a vibrationpowered electrical generators using PZT piezoelectric ceramic associated to two different power conditioning circuits. A new approach of the piezoelectric power conversion based on a nonlinear voltage processing is presented and implemented with a particular power conditioning circuit topology. Theoretical predictions and experimental results show that the nonlinear processing technique may increase the power harvested by a factor up to 4 compared to the Standard optimization technique. Properties of this new technique are analyzed in particular in the case of broadband, random vibrations, and compared to those of the Standard interface.

• Type: Journal
• Year: 2007
• Where: CORR
• Authors: E. Lefeuvre, A. Badel, C. Richard, L. Petit, D. Guyomar
• Keywords: CORR 2007, Education, Nonlinear Processing Technique, Piezoelectric Power Conversion, Power Conditioning