YI-CHUNG SHULien, I. C.I. C.Lien2018-09-102018-09-10200607918379049780791837900https://www.scopus.com/record/display.uri?eid=2-s2.0-85196543099&origin=resultslisthttp://scholars.lib.ntu.edu.tw/handle/123456789/323420We study the steady state response of a piezoelectric generator connected to an AC-DC bridge rectifying circuit plus a resistor as the basis for design analysis. In contrast with estimates obtained by various degrees of approximations in recent literature, a closed form solution is derived under the steady-state operation. We show that the average harvested power density depends on the input vibration characteristics (frequency and acceleration), the electric load, the natural frequency, the density, the mechanical damping ratio, and the overall electromechanical coupling coefficient of the system. With it an effective power normalization scheme is provided in order to compare power harvesting devices of different sizes and with different vibration inputs to estimate efficiencies. The theoretical predictions are validated and found in good agreement with our recent experiment.Energy harvesting circuitPiezoelectric power generatorsPower harvesting[SDGs]SDG7conference paper10.1115/IMECE2006-141852-s2.0-85196543099