NDLI: Contactless Current Sensors Based on Magnetic Tunnel Junction for Smart Grid Applications

Content Provider	IEEE Xplore Digital Library
Author	Yong Ouyang Jinliang He Jun Hu Gen Zhao Zhongxu Wang Wang, S.X.
Copyright Year	1965
Abstract	Advanced sensing techniques are key technologies required for the smart grid. Magnetic tunnel junction (MTJ) sensors hold great promises in the distributed linear current sensing, with small size, low price, and excellent performances. In this paper, MTJ Wheatstone bridge sensors were fabricated, attaining a typical sensitivity of 4.94 mV/V/Oe with an offset of -2.84 mV/V. A contactless current sensor based on the MTJ sensor was designed and realized, achieving a sensitivity of 7.75 mV/A and an offset of -8.68 mV. We can adjust the sensitivity and the linear range of the sensor by changing the gap of the magnetic core, and make the sensor much less susceptible to electrical wire's location and orientation. This paper provides a practical current sensing technique for smart grid applications.
Sponsorship	IEEE Magnetics Society
Starting Page	1
Ending Page	4
Page Count	4
File Size	2311134
File Format	PDF
ISSN	00189464
Volume Number	51
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic cores Magnetic sensors Magnetic tunneling Sensitivity Intelligent sensors Magnetic fields Magnetic core MTJ Contactless Linear Current sensor smart grid Contactless linear current sensor magnetic core magnetic tunnel junction (MTJ)
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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