Development of a contactless DC current sensor with high linearity and sensitivity based on the magnetoelectric effect

• Type: Article in International Scientific Journal
• Date: 2018

Authors

Castro, N (Author) Other; Reis, S (Author) Other; Silva, MP (Author) Other; Correia, V (Author) Other; Lanceros Mendez, S (Author) Other; Martins, P (Author) Other

Journal

Title: Smart Materials and Structures

Vol. 27

ISSN: 0964-1726

Publisher: Institute of Physics Publishing

Indexing

ISI Web of Knowledge - 29 Citations

Scopus - 32 Citations

Other information

Authenticus ID: P-013-WFB

DOI: 10.1088/1361-665x/aab969

Abstract (EN): The magnetoelectric (ME) effect is increasingly being considered an attractive alternative for magnetic field and smart current sensing, being able to sense static and dynamic magnetic fields. This work reports on a contactless DC current sensor device based on a ME PVDF/Metglas composite, a solenoid and the corresponding electronic instrumentation. The ME sample shows a maximum resonant ME coefficient (¿ 33) of 34.48 V cm-1 Oe-1, a linear response (R 2 = 0.998) and a sensitivity of 6.7 mV A-1. With the incorporation of a charge amplifier, an AC-RMS converter and a microcontroller the linearity is maintained (R 2 = 0.997), the ME output voltage increases to a maximum of 2320 mV and the sensitivity rises to 476.5 mV A-1. Such features allied to the highest sensitivity reported in the literature on polymer-based ME composites provide to the reported ME sensing device suitable characteristics to be used in non-contact electric current measurement, motor operational status checking, and condition monitoring of rechargeable batteries, among others.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7