Thermal energy harvesting based on ferromagnetic shape memory alloy microactuation

M. Gueltig, B. Haefner, M. Ohtsuka, M. Kohl

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

This paper presents a new principle of harvesting thermal energy at small temperature differences based on bidirectional actuation of a ferromagnetic shape memory alloy (FSMA) cantilever. The thermally induced change of magnetization of the ferromagnetic cantilever tip is used to generate a current according to Faraday's law. The layout, fabrication and performance of a first demonstrator are shown operating at frequencies and amplitudes of 80 Hz and several hundred microns, respectively. For a pick-up coil of 1000 turns, the maximum current is about 10 μA corresponding to a power density of 0.8 μW/cm3.

Original languageEnglish
Title of host publication2013 Transducers and Eurosensors XXVII
Subtitle of host publicationThe 17th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS and EUROSENSORS 2013
Pages2803-2806
Number of pages4
DOIs
Publication statusPublished - 2013 Dec 1
Event2013 17th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS and EUROSENSORS 2013 - Barcelona, Spain
Duration: 2013 Jun 162013 Jun 20

Publication series

Name2013 Transducers and Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS and EUROSENSORS 2013

Other

Other2013 17th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS and EUROSENSORS 2013
CountrySpain
CityBarcelona
Period13/6/1613/6/20

Keywords

  • Ferromagnetic shape memory alloy
  • bi-directional actuation
  • energy harvesting
  • film
  • magnetron sputtering

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering

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