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A unified approach to optimal conditions of power harvesting using electromagnetic and piezoelectric transducers

A unified approach to optimal conditions of power harvesting using electromagnetic and piezoelectric transducers
A unified approach to optimal conditions of power harvesting using electromagnetic and piezoelectric transducers
Power harvesting systems generate electric power from mechanical vibration using electromechanical transducers. To assess the practical performance of these systems, it is important to be able to estimate the maximum power that could be harvested from a specific structure and to derive the optimal conditions for the harvesting. We introduce a two-port network model which can fully describe the electromechanical coupled dynamics of the transducer, including the interaction between the structure and the electrical load in a unified manner. Electromagnetic and piezoelectric transducers are then considered as special cases of this general treatment. The power harvested by both types of transducer on a simply supported beam is derived and the optimal matching conditions and the maximum harvested power are obtained theoretically. In this numerical example, a piezoelectric transducer would have higher potential than an electromagnetic device of equal mass for the harvesting, but only when the transducer parameters are tuned optimally.
948-958
Nakano, Kimihiko
37314831-0f74-4062-b98a-b1d36cec7864
Elliott, Stephen J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Rustighi, Emiliano
9544ced4-5057-4491-a45c-643873dfed96
Nakano, Kimihiko
37314831-0f74-4062-b98a-b1d36cec7864
Elliott, Stephen J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Rustighi, Emiliano
9544ced4-5057-4491-a45c-643873dfed96

Nakano, Kimihiko, Elliott, Stephen J. and Rustighi, Emiliano (2007) A unified approach to optimal conditions of power harvesting using electromagnetic and piezoelectric transducers. Smart Materials and Structures, 16 (4), 948-958. (doi:10.1088/0964-1726/16/4/002).

Record type: Article

Abstract

Power harvesting systems generate electric power from mechanical vibration using electromechanical transducers. To assess the practical performance of these systems, it is important to be able to estimate the maximum power that could be harvested from a specific structure and to derive the optimal conditions for the harvesting. We introduce a two-port network model which can fully describe the electromechanical coupled dynamics of the transducer, including the interaction between the structure and the electrical load in a unified manner. Electromagnetic and piezoelectric transducers are then considered as special cases of this general treatment. The power harvested by both types of transducer on a simply supported beam is derived and the optimal matching conditions and the maximum harvested power are obtained theoretically. In this numerical example, a piezoelectric transducer would have higher potential than an electromagnetic device of equal mass for the harvesting, but only when the transducer parameters are tuned optimally.

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Published date: August 2007

Identifiers

Local EPrints ID: 49260
URI: http://eprints.soton.ac.uk/id/eprint/49260
PURE UUID: 991bdfca-cceb-4ca1-a69f-3f01bad45876
ORCID for Emiliano Rustighi: ORCID iD orcid.org/0000-0001-9871-7795

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Date deposited: 26 Oct 2007
Last modified: 15 Mar 2024 09:54

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Author: Kimihiko Nakano

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