Energy harvesting from kinetic ambient energy requires converters able to efficiently operate in the low frequency range. A limit of the solutions proposed in the literature, both electromagnetic and piezoelectric, is their operating frequency, which generally ranges from about 50 to 300 Hz. To overcome these limitations, this work proposes an innovative energy harvester exploiting two counteracting Belleville springs. Thanks to the peculiar height to thickness ratio of the springs a highly compliant elastic system is obtained, which can be used either for electromagnetic or piezoelectric harvesting. The harvester is modelled analytically and numerically both with regard to the force-displacement and to the modal response. The experimental validation of the harvester, highlights a noticeable power output but at a higher eigenfrequency than expected.

A Belleville-Spring Based Piezoelectric or Electromagnetic Energy Harvester / Castagnetti, Davide. - ELETTRONICO. - 2:(2014), pp. V002T07A002-8 pages. ((Intervento presentato al convegno ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems tenutosi a Newport, Rhode Island, USA nel 8 - 10 settembre, 2014 [10.1115/SMASIS20147417].

A Belleville-Spring Based Piezoelectric or Electromagnetic Energy Harvester

CASTAGNETTI, Davide
2014

Abstract

Energy harvesting from kinetic ambient energy requires converters able to efficiently operate in the low frequency range. A limit of the solutions proposed in the literature, both electromagnetic and piezoelectric, is their operating frequency, which generally ranges from about 50 to 300 Hz. To overcome these limitations, this work proposes an innovative energy harvester exploiting two counteracting Belleville springs. Thanks to the peculiar height to thickness ratio of the springs a highly compliant elastic system is obtained, which can be used either for electromagnetic or piezoelectric harvesting. The harvester is modelled analytically and numerically both with regard to the force-displacement and to the modal response. The experimental validation of the harvester, highlights a noticeable power output but at a higher eigenfrequency than expected.
ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
Newport, Rhode Island, USA
8 - 10 settembre, 2014
2
V002T07A002
8 pages
Castagnetti, Davide
A Belleville-Spring Based Piezoelectric or Electromagnetic Energy Harvester / Castagnetti, Davide. - ELETTRONICO. - 2:(2014), pp. V002T07A002-8 pages. ((Intervento presentato al convegno ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems tenutosi a Newport, Rhode Island, USA nel 8 - 10 settembre, 2014 [10.1115/SMASIS20147417].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/1060373
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