Ring-type electric current sensor based on ring-shaped magnetoelectric laminate of epoxy-bonded Tb{sub 0.3}Dy{sub 0.7}Fe{sub 1.92} short-fiber/NdFeB magnet magnetostrictive composite and Pb(Zr, Ti)O{sub 3} piezoelectric ceramic

Journal Article · Sat May 15 00:00:00 EDT 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3360349· OSTI ID:21476220

Leung, Chung Ming; Or, Siu Wing; Zhang, Shengyao; Ho, S L ^[1]

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1. Department of Electrical Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon (Hong Kong)

A ring-type electric current sensor operated in vortex magnetic field detection mode is developed based on a ring-shaped magnetoelectric laminate of an axially polarized Pb(Zr, Ti)O{sub 3} (PZT) piezoelectric ceramic ring bonded between two circumferentially magnetized epoxy-bonded Tb{sub 0.3}Dy{sub 0.7}Fe{sub 1.92} (Terfenol-D) short-fiber/NdFeB magnet magnetostrictive composite rings. The electric current sensitivity of the sensor was evaluated, both theoretically and experimentally. The sensor showed a high nonresonance sensitivity of {approx}12.6 mV/A over a flat frequency range of 1 Hz-30 kHz and a large resonance sensitivity of 92.2 mV/A at the fundamental shape resonance of 67 kHz, besides an excellent linear relationship between the input electric current and the output magnetoelectrically induced voltage. The power-free, bias-free, high-sensitive, and wide-bandwidth natures of the sensor make it great potential for real-time condition monitoring of engineering systems having electric current-carrying cables or conductors.

• OSTI ID: 21476220
• Journal Information: Journal of Applied Physics, Vol. 107, Issue 9; Conference: 11. joint MMM-Intermag conference, Washington, DC (United States), 18-22 Jan 2010; Other Information: DOI: 10.1063/1.3360349; (c) 2010 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

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