Broadband high-sensitivity current-sensing device utilizing nonlinear magnetoelectric medium and nanocrystalline flux concentrator

A broadband current-sensing device with frequency-conversion mechanism consisting of Terfenol-D/Pb(Zr.Ti)O3 (PZT)/Terfenol-D magnetoelectric laminate and Fe73.5Cu1Nb3Si13.5B9 nanocrystalline flux concentrator is fabricated and characterized. For the purpose of acquiring resonance-enhanced sensitivit...

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Bibliographic Details
Published in:Review of scientific instruments 2015-09, Vol.86 (9), p.095005-095005
Main Authors: Zhang, Jitao, He, Wei, Zhang, Ming, Zhao, Hongmei, Yang, Qian, Guo, Shuting, Wang, Xiaolei, Zheng, Xiaowan, Cao, Lingzhi
Format: Article
Language:English
Subjects:
Automotive parts
Broadband
Concentrators
Dependence
Detection
Magnetoelectric media
Magnetostriction
Nonlinearity
Scientific apparatus & instruments
Sensitivity enhancement
Terfenol alloys
Zirconium
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Summary:A broadband current-sensing device with frequency-conversion mechanism consisting of Terfenol-D/Pb(Zr.Ti)O3 (PZT)/Terfenol-D magnetoelectric laminate and Fe73.5Cu1Nb3Si13.5B9 nanocrystalline flux concentrator is fabricated and characterized. For the purpose of acquiring resonance-enhanced sensitivity within broad bandwidth, a frequency-modulation mechanism is introduced into the presented device through the nonlinearity of field-dependence giant magnetostrictive materials. The presented configuration provides a solution to monitor the weak currents and achieves resonance-enhanced sensitivity of 178.4 mV/A at power-line frequency, which exhibits ∼3.86 times higher than that of direct output at power-line frequency of 50 Hz. Experimental results demonstrate that a weak step-change input current of 1 mA can be clearly distinguished by the output amplitude or phase. This miniature current-sensing device provides a promising application in power-line weak current measurement.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4930150