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Open AccessArticle

Electronic Energy Meter Based on a Tunnel Magnetoresistive Effect (TMR) Current Sensor

1
Department of Electronics Engineering, University of Valencia, 46010 Valencia, Spain
2
INESC Microsystems and Nanotechnologies (INESC-MN), Institute for Nanosciences and Nanotechnologies, 1000-029 Lisbon, Portugal
3
Instituto Superior Técnico (IST), Universidade de Lisboa, Av. Rovisco Pais, 1000-029 Lisbon, Portugal
4
International Iberian Nanotechnology Laboratory (INL), Av. Mestre José Veiga, 4715-31 Braga, Portugal
*
Author to whom correspondence should be addressed.
Materials 2017, 10(10), 1134; https://doi.org/10.3390/ma10101134
Received: 1 August 2017 / Revised: 10 September 2017 / Accepted: 15 September 2017 / Published: 26 September 2017
(This article belongs to the Special Issue Magnetoresistance Effects and Their Application to Spintronic Devices)
In the present work, the design and microfabrication of a tunneling magnetoresistance (TMR) electrical current sensor is presented. After its physical and electrical characterization, a wattmeter is developed to determine the active power delivered to a load from the AC 50/60 Hz mains line. Experimental results are shown up to 1000 W of power load. A relative uncertainty of less than 1.5% with resistive load and less than 1% with capacitive load was obtained. The described application is an example of how TMR sensing technology can play a relevant role in the management and control of electrical energy. View Full-Text
Keywords: tunnel magnetoresistance; current sensor; energy meter; power measurement; wattmeter; internet-of-things tunnel magnetoresistance; current sensor; energy meter; power measurement; wattmeter; internet-of-things
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Vidal, E.G.; Muñoz, D.R.; Arias, S.I.R.; Moreno, J.S.; Cardoso, S.; Ferreira, R.; Freitas, P. Electronic Energy Meter Based on a Tunnel Magnetoresistive Effect (TMR) Current Sensor. Materials 2017, 10, 1134.

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