期刊
SENSORS
卷 20, 期 24, 页码 -出版社
MDPI
DOI: 10.3390/s20247142
关键词
magnetoelectric effect; magnetoelectric gradient structure; bidomain lithium niobate; magnetoelectric sensor; current sensor
资金
- RFBR as part of the implementation and validation of the ME current sensor [19-07-00391]
- Russian Science Foundation as part of the development of technology and preparation of the gradient ME structures [18-79-10265]
- Ministry of Education and Science of the Russian Federation of NUST MISiS [K2-2019-015]
- Ministry of Science and Higher Education of the Russian Federation [0718-2020-0031]
- Russian Science Foundation [18-79-10265] Funding Source: Russian Science Foundation
The article is devoted to the theoretical and experimental study of a magnetoelectric (ME) current sensor based on a gradient structure. It is known that the use of gradient structures in magnetostrictive-piezoelectric composites makes it possible to create a self-biased structure by replacing an external magnetic field with an internal one, which significantly reduces the weight, power consumption and dimensions of the device. Current sensors based on a gradient bidomain structure LiNbO3 (LN)/Ni/Metglas with the following layer thicknesses: lithium niobate-500 mu m, nickel-10 mu m, Metglas-29 mu m, operate on a linear section of the working characteristic and do not require the bias magnetic field. The main characteristics of a contactless ME current sensor: its current range measures up to 10 A, it has a sensitivity of 0.9 V/A, its current consumption is not more than 2.5 mA, and its linearity is maintained to an accuracy of 99.8%. Some additional advantages of a bidomain lithium niobate-based current sensor are the increased sensitivity of the device due to the use of the bending mode in the electromechanical resonance region and the absence of a lead component in the device.
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