Simulation and experimental demonstration of improved efficiency in coupled piezoelectric cantilevers by extended strain distribution
Journal article, 2015

A piezoelectric energy harvester design is proposed, which will achieve a wider bandwidth without compromising energy conversion efficiency for future use in e g gas turbines. By coupling two cantilevers where the tip of the bottom one is attached to the base of the upper one, the harvester will have a wider bandwidth and a higher power output compared to two optimally tuned single cantilevers, which to a large part is the effect of an extended strain distribution in the bottom cantilever in the coupled configuration. The design is compact, using only half the area compared to two parallel single cantilevers at the price of only a small increase in height. The coupled harvester displays approximately five times higher power output than two tuned single cantilevers. (C) 2015 Elsevier B.V. All rights reserved.

Engineering

2DOF harvester

Piezoelectric harvester

Energy harvesting

Electrical & Electronic

Instruments & Instrumentation

Author

Henrik Staaf

Chalmers, Applied Physics, Electronics Material and Systems Laboratory

Elof Köhler

Chalmers, Applied Physics, Electronics Material and Systems Laboratory

D. Parthasarathy

Volvo Group

Per Lundgren

Chalmers, Applied Physics, Electronics Material and Systems Laboratory

Peter Enoksson

Chalmers, Applied Physics, Electronics Material and Systems Laboratory

Sensors and Actuators, A: Physical

0924-4247 (ISSN)

Vol. 229 136-140

Areas of Advance

Transport

Energy

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1016/j.sna.2015.03.010

More information

Latest update

11/19/2018