• Title
    [International Journal] Magnetic energy harvesting with magnetoelectrics: an emerging technology for self-powered autonomous systems
  • Journal
    Sustainable Energy&Fuels
  • Authors
    Venkateswarlu Annapureddy, Haribabu Palneedi, Geon-Tae Hwang, Mahesh Peddigari, Dae-Young Jeong, Woon-Ha Yoon, Kwang-Ho Kim and Jungho Ryu*
  • Date
    December, 2017
  • Citation Index
    비 SCI
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  • 223
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  • 글주소
  • 02-20

The deployment of wireless sensor networks (WSNs) for the internet of things (IoT) and remote monitoring
devices has made tremendous progress in the last few years. At the same time, energy harvesters are also
being developed to satisfy the power requirement of WSNs and other low power consumption electronics,
to increase the device operating time and overcome the limitations of conventional electric power supplies,
including batteries. Among various resources for energy harvesting, the magnetic noise produced by power
transmission infrastructures and associated mechanical vibrations are ubiquitous energy sources that could
be converted into electricity by high efficiency energy conversion materials or devices. Electromagnetic
energy conversion systems that operate on the principle of Faraday's induction law can provide sufficient
power from strong magnetic fields. However, under weak magnetic fields with low frequency such as
50/60 Hz, the power generated from an electromagnetic device is disappointingly small. Alternative
energy harvesting technologies with high power density and small device volume/dimensions are
obviously necessary for WSNs of IoT. In this review article, the current status and prospects of an
emerging magnetic energy harvesting technology, the so-called magneto-mechano-electric (MME)
generators, are reviewed. MME generators utilize the magnetoelectric (ME) coupling in composites of
piezoelectric and magnetostrictive materials and interaction between the proof magnet mass and
magnetic field. Since the piezoelectric phase in the composite also responds to mechanical vibration
directly, an ME-based energy harvester can harness energy from both mechanical vibrations and
magnetic fields simultaneously. This combination is expected to enhance the total power output and
conversion efficiency. The MME generator can be a ubiquitous power source for WSNs, low power
electronic devices, and wireless charging systems by harvesting energy from the tiny magnetic fields
present as parasitic magnetic noise in an ambient environment.