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Materials 2017, 10(10), 1134; doi:10.3390/ma10101134

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.
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)
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Abstract

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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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

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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