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Closed magnetic circuit magnetoelectric composites for extremely high sensitivity and electromechanical resonances controllable current sensor

Do, Thi Huong Giang and Nguyen, Trong Vinh and Vu, Thi Ngoc Khanh and Ho, Anh Tam and Phung, Anh Tuan and Nguyen, Huu Duc (2018) Closed magnetic circuit magnetoelectric composites for extremely high sensitivity and electromechanical resonances controllable current sensor. In: The 9th International Workshop on ADVANCED MATERIALS SCIENCE AND NANOTECHNOLOGY, 7-11 November 2018, Ninh Binh City, Vietnam.

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Abstract

Many assiduous researches have been taken into account by improving the increasing the soft intrinsic magnetic susceptibility of ribbon ferromagnetic phase or optimizing shape and size as well as piezoelectric/magnetostrictive volume ratio. All of these efforts lead to abate the demagnetization field. This paper describes from simulation toward experiment to find out the most effective method for enhancing magnetoelectric effect (ME) in current sensing applications. By using ring-shape magnetoelectric composites, many advantages were found includes: (i) enhance of the magnetic field concentration and (ii) eliminate impact of demagnetization field between magnetic layers thanks to closed magnetic circuit; (iii) easy to tune electromechanical resonances; and (iv) independent of the distance from the current-carrying cable. Indeed, it shows a variable resonant frequency from 20 to kHz 175 kHz depending on the size and structuce. An excellent linearly and an extremely high current sensitivity ~ 10 V/A was achieved in the Metglas/PZT/Metglas penta-layered laminates. Compared with the other close-magnetic-circuit-type current sensor topologies reported, this sensitivity is several hundred times higher. This sensor has great potential for further current sensing applications.

Item Type: Conference or Workshop Item (Speech)
Subjects: Engineering Physics
Divisions: Faculty of Engineering Physics and Nanotechnology (FEPN)
Depositing User: Dr Giang Do
Date Deposited: 20 Jun 2019 22:39
Last Modified: 24 Jun 2019 06:46
URI: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/3513

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