Steady state response of a piezoelectric power harvesting system
Journal
American Society of Mechanical Engineers, Aerospace Division (Publication) AD
ISBN (of the container)
9780791837900
ISBN
0791837904
9780791837900
Date Issued
2006
Author(s)
Abstract
We 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.
Event(s)
2006 ASME International Mechanical Engineering Congress and Exposition, IMECE2006. 5 November 2006 through 10 November 2006, Code 69674
Subjects
Energy harvesting circuit
Piezoelectric power generators
Power harvesting
SDGs
Type
conference paper