Coupled multiphysics finite element model and experimental testing of a thermo-magnetically triggered piezoelectric generator

[摘要] This paper deals with the coupled multiphysics finite element modeling and the experimental testing of a thermo-magnetically triggered piezoelectric generator. The model presented here, which has been developed in ANSYS software and experimentally validated, promotes a better understanding of the dynamic behavior of proposed generator. Special attention was put into the coupled multiphysics interactions, for instance, the thermal-dependent demagnetization of soft magnetic material, the piezoelectric transduction and the output power. In order to characterize the power generator, many finite element simulations were conducted, included modal and transient analysis. To verify the effectiveness of the model, a prototype was built and tested. The findings thus obtained were compared with simulation results. Obtained results describe for the first time a fully coupled model of an innovative approach for thermomagnetic energy harvesting. Moreover, the total volume of our harvester (length × width × height: 20 × 4 × 2 mm) is 85 times lower than that of previous experimental harvester.

[发布机构] Université Grenoble Alpes, TIMA Laboratory, Grenoble; F38031, France^1;CNRS, TIMA Laboratory, Grenoble; F-38031, France^2

[效力级别] 能源学

[关键词] ANSYS software;Dynamic behaviors;Experimental testing;Finite element simulations;Fully-coupled model;Innovative approaches;Multi-physics;Piezoelectric generators