TY - JOUR
T1 - Practical challenges of magnetic sensors based on magnetic tunnel junctions for power grid applications
AU - Gao, Kaizhong
AU - Liou, Sy Hwang
N1 - Funding Information:
This work was supported in part by the International Business and Technology Service Corporation 201904001 sensor technology initiatives and in part by the Honeywell Federal Manufacturing & Technologies. The MTJ samples were prepared in the Nebraska Nanoscale Facility: National Nanotechnology Coordinated Infrastructure and the Nebraska Center for Materials and Nanoscience, which are supported in part by the National Science Foundation under Award NNCI-1542182 and in part by the Nebraska Research Initiative. Dr. K. Gao acknowledges M. Ahlstrom for his valuable comments on the grid applications.
Publisher Copyright:
© 2010-2012 IEEE.
PY - 2020
Y1 - 2020
N2 - We provide a review of the status and challenges for utilizing magnetic tunneling junction (MTJ) based magnetic sensors for power grid applications. We show that, with both modeling and experimental measurement, an optimized MTJ-based magnetic sensor can be utilized to monitor grid current, especially for individual grid lines. From the perspective of the sensor, the sensitivity, signal-to-noise ratio, and linearity can all meet the needs in the field. Unlike traditional measurements, this measurement can be based on a contactless or 'remote' sensing setup, where the sensor is placed away from the grid line. One of the challenges is that a complex topology and multiple grid lines may exist with different current levels. The other challenge is that, with the improved sensing capability provided by these MTJ sensors, a significantly larger amount of data can be collected, so the system bottleneck shifts from sensing to data transfer.
AB - We provide a review of the status and challenges for utilizing magnetic tunneling junction (MTJ) based magnetic sensors for power grid applications. We show that, with both modeling and experimental measurement, an optimized MTJ-based magnetic sensor can be utilized to monitor grid current, especially for individual grid lines. From the perspective of the sensor, the sensitivity, signal-to-noise ratio, and linearity can all meet the needs in the field. Unlike traditional measurements, this measurement can be based on a contactless or 'remote' sensing setup, where the sensor is placed away from the grid line. One of the challenges is that a complex topology and multiple grid lines may exist with different current levels. The other challenge is that, with the improved sensing capability provided by these MTJ sensors, a significantly larger amount of data can be collected, so the system bottleneck shifts from sensing to data transfer.
KW - Magnetic instruments
KW - magnetic sensors
KW - magnetic tunneling junctions
KW - power grid
KW - remote sensing
KW - spin electronics
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U2 - 10.1109/LMAG.2020.2966419
DO - 10.1109/LMAG.2020.2966419
M3 - Article
AN - SCOPUS:85078022484
SN - 1949-307X
VL - 11
JO - IEEE Magnetics Letters
JF - IEEE Magnetics Letters
M1 - 8960467
ER -