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Tunnel magnetoresistive sensor design and applications for current measurement
Author(s): Qiuyang Li; Siyu Chen; Suqin Xiong; Penghe Zhang
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Paper Abstract

Current sensing plays an important role in electric energy measurement, relay protection, intelligent equipment control and other fields in smart grid. Compared with traditional current transformers, for example, Rogowski coils and Hall current sensors, Tunnel magnetoresistance (TMR) sensor has the advantages of input/output magnetic isolation, AC and DC current measurement ability, wide bandwidth, small size, et al. Accordingly, TMR sensors are applicable for various scenarios and meet multiple current measurement needs. Based on the analysis of the principle of TMR sensor, the structure of current sensor system based on tunnelling magnetoresistance is introduced. Then, the designs of filter circuit and temperature compensation circuit are given. Finally, the experimental results show that TMR current sensor has good performance for current measurement, indicating widely applications in the field of current measurement in the future.

Paper Details

Date Published: 31 December 2019
PDF: 6 pages
Proc. SPIE 11384, Eleventh International Conference on Signal Processing Systems, 113841H (31 December 2019); doi: 10.1117/12.2559705
Show Author Affiliations
Qiuyang Li, China Electric Power Research Institute (China)
Siyu Chen, China Electric Power Research Institute (China)
Suqin Xiong, China Electric Power Research Institute (China)
Penghe Zhang, China Electric Power Research Institute (China)


Published in SPIE Proceedings Vol. 11384:
Eleventh International Conference on Signal Processing Systems
Kezhi Mao, Editor(s)

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