Magnetostrictive-piezoelectric composite structures for energy harvesting

Thomas Lafont (1) , Leticia Gimeno Monge (1) , Jérôme Delamare (1) , Gor Lebedev (1, 2) , Dimitri Zakharov (1) , Bernard Viala (2) , Orphée Cugat (1) , Olivier Geoffroy (1) , Nicolas Galopin (1) , Lauric Garbuio (1)

1 G2ELab - Laboratoire de Génie Electrique de Grenoble
2 CEA-LETI - Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information

In this paper, harvesters coupling magnetostrictive and piezoelectric materials are investigated. The energy conversion of quasi-static magnetic field variations into electricity is detailed. Experimental results are exposed for two macroscopic demonstrators based on the rotation of a permanent magnet. These composite/hybrid devices use both piezoelectric and magnetostrictive (amorphous FeSiB ribbon or bulk Terfenol-D) materials. A quasi-static (or ultra-low frequency) harvester is constructed with exploitable output voltage, even in quasi-static mode. Integrated micro-harvesters using sub-micron multilayers of active materials on Si have been built and are currently being characterized.

Domaines: Energie électrique

Thomas Lafont, Leticia Gimeno Monge, Jérôme Delamare, Gor Lebedev, Dimitri Zakharov, et al.. Magnetostrictive-piezoelectric composite structures for energy harvesting. Journal of Micromechanics and Microengineering, 2012, 22 (9), ⟨10.1088/0960-1317/22/9/094009⟩. ⟨hal-00766924⟩