A low frequency vibration energy harvester using magnetoelectric laminate composite

In this paper, we present a vibration energy harvester using magnetoelectric laminate composite and a springless spherical permanent magnet as a proof mass. The harvester utilizes a freely movable spherical permanent magnet to transform external vibration into a time varying magnetic field applied t...

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Bibliographic Details
Published in:Smart materials and structures 2013-11, Vol.22 (11), p.115037-1-11
Main Authors: Ju, Suna, Chae, Song Hee, Choi, Yunhee, Lee, Seungjun, Lee, Hyang Woon, Ji, Chang-Hyeon
Format: Article
Language:English
Subjects:
Energy harvesting
Energy use
Exact sciences and technology
General equipment and techniques
Harvesters
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Laminates
Lead zirconate titanates
Open circuit voltage
Permanent magnets
Physics
Transducers
Vibration
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Summary:In this paper, we present a vibration energy harvester using magnetoelectric laminate composite and a springless spherical permanent magnet as a proof mass. The harvester utilizes a freely movable spherical permanent magnet to transform external vibration into a time varying magnetic field applied to the magnetoelectric transducer. The laminate composite consists of a Ni-Mn-Ga-based MSMA (magnetic shape memory alloy) element and a PZT (lead zirconate titanate) plate. A proof-of-concept harvester has been fabricated and characterized at various input accelerations and frequencies. A maximum open circuit voltage of 1.18 V has been obtained in response to a 3g vibration at 17 Hz with the fabricated device. Moreover, a maximum output voltage of 10.24 V and output power of 4.1 μW have been achieved on a 950 Ω load, when the fabricated energy harvester was mounted on a smartphone and shaken by hand.
ISSN:0964-1726
1361-665X
DOI:10.1088/0964-1726/22/11/115037