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    Magnetic Field Energy Harvesting from AC Lines for Powering Wireless Sensor Nodes in Smart Grids

    Access Status
    Fulltext not available
    Authors
    Hosseinimehr, Tahoura
    Tabesh, A.
    Date
    2016
    Type
    Journal Article
    
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    Citation
    Hosseinimehr, T. and Tabesh, A. 2016. Magnetic Field Energy Harvesting from AC Lines for Powering Wireless Sensor Nodes in Smart Grids. IEEE Transactions on Industrial Electronics. 63 (8): pp. 4947-4954.
    Source Title
    IEEE Transactions on Industrial Electronics
    DOI
    10.1109/TIE.2016.2546846
    ISSN
    0278-0046
    School
    Department of Electrical and Computer Engineering
    URI
    http://hdl.handle.net/20.500.11937/52230
    Collection
    • Curtin Research Publications
    Abstract

    This paper presents an electromagnetic energy harvesting device for capturing power from ac power lines using a miniaturized linear permanent magnet (PM) synchronous generator. The suggested device is useful to power wireless monitoring sensors in emerging smart grids. Conventional methods for energy harvesting from power lines use current transformers which structurally need to form closed magnetic paths around the lines. However, the suggested device can operate in the proximity of the lines due to using an independent PM generator. This feature facilitates installation of the device particularly in smart grids that require ample of easy-to-install and maintenance free monitoring sensors along the power lines. The proposed energy harvester uses a magnetically driven vibrating beam around the line that is attached to a linear PM synchronous generator (PMSG) including an array of small PMs with opposite polarities. This PM arrangement improves the induced voltage of the generator due to increasing the flux gradient within the linear PMSG. Experimental test results based on a cm-scale prototype show that an average power of 0.16 mW at 50 A (i.e., power density of 3.2 mW/kA) is achievable, equivalent to a 1038-mAh/2.7-V re-chargeable battery per year for a 100-A line.

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