Analysis of Rosen type energy harvesting devices from porous piezoceramics with great longitudinal piezomodulus

Abstract

Abstract This paper describes analytical and numerical modeling of the energy harvesting device based on composite piezoelectric materials. The device is a nonuniformly polarized porous piezoceramic compound plate such as a Rosen‐type piezoelectric transformer with single bimorph section. The effective properties of porous piezoceramics with great longitudinal piezoelectric strain coefficient d 33 were calculated in the ACELAN‐COMPOS finite element package. An analytical applied theory for a piecewise uniformly polarized piezoelectric generator was developed and compared with the results of finite element simulation performed in ACELAN package. An efficient design of a cantilever‐based energy harvesting device is proposed. The analysis of the considered devices depending on the percentage of porosity of piezoceramics and boundary conditions is carried out. It is shown that with an increase in the percentage of porosity, the output characteristics of energy harvesting devices improve. In addition, different boundary conditions were studied for specific PEG made of porous ceramics with non‐homogeneous polarization to find more effective scheme of fixing.