A Magneto-Mechanical Piezoelectric Energy Harvester Designed to Scavenge AC Magnetic Field from Thermal Power Plant with Power-Line Cables

Quan Wang, Kyung-Bum Kim, Sang-Bum Woo, Yooseob Song and Tae-Hyun Sung
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Quan Wang: Department of Electrical Engineering, Hanyang University, Seoul 04763, Korea
Kyung-Bum Kim: Department of Electrical Engineering, Hanyang University, Seoul 04763, Korea
Sang-Bum Woo: Department of Electrical Engineering, Hanyang University, Seoul 04763, Korea
Yooseob Song: Department of Civil Engineering, The University of Texas Rio Grande Valley, Edinburg, TX 78539, USA
Tae-Hyun Sung: Department of Electrical Engineering, Hanyang University, Seoul 04763, Korea

Energies, 2021, vol. 14, issue 9, 1-12

Abstract: Piezoelectric energy harvesters have attracted much attention because they are crucial in portable industrial applications. Here, we report on a high-power device based on a magneto-mechanical piezoelectric energy harvester to scavenge the AC magnetic field from a power-line cable for industrial applications. The electrical output performance of the harvester (×4 layers) reached an output voltage of 60.8 V max , an output power of 215 mW max (98 mW rms ), and a power density of 94.5 mW max /cm 3 (43.5 mW rms /cm 3 ) at an impedance matching of 5 k? under a magnetic field of 80 ?T. The multilayer energy harvester enables high-output performance, presenting an obvious advantage given this improved level of output power. Finite element simulations were also performed to support the experimental observations. The generator was successfully used to power a wireless sensor network (WSN) for use on an IoT device composed of a temperature sensor in a thermal power station. The result shows that the magneto-mechanical piezoelectric energy harvester (MPEH) demonstrated is capable of meeting the requirements of self-powered monitoring systems under a small magnetic field, and is quite promising for use in actual industrial applications.

Keywords: piezoelectric energy harvester; industrial application; AC magnetic field; power-line cable; wireless sensor network; multilayer device (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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