Note: a high-sensitivity current sensor based on piezoelectric ceramic Pb(Zr,Ti)O3 and ferromagnetic materials

Wei He; Ping Li; Yumei Wen; Jitao Zhang; Aichao Yang; Caijiang Lu

doi:10.1063/1.4865120

Note: a high-sensitivity current sensor based on piezoelectric ceramic Pb(Zr,Ti)O3 and ferromagnetic materials

Rev Sci Instrum. 2014 Feb;85(2):026110. doi: 10.1063/1.4865120.

Authors

Wei He¹, Ping Li¹, Yumei Wen¹, Jitao Zhang¹, Aichao Yang¹, Caijiang Lu¹

Affiliation

¹ Research Center of Sensors and Instruments, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.

PMID: 24593410
DOI: 10.1063/1.4865120

Abstract

An electric current sensor using piezoelectric ceramic Pb(Zr,Ti)O3 (PZT) sandwiched between two high permeability cuboids and two NdFeB magnets is presented. The magnetic field originating from an electric wire is augmented by the high permeability cuboids. The PZT plate experiences an enhanced magnetic force and generates voltage output. When placed with a distance of d = 5.0 mm from the wire, the sensor shows a flat sensitivity of ∼5.7 mV/A in the frequency range of 30 Hz-80 Hz and an average sensitivity of 5.6 mV/A with highly linear behavior in the current range of 1 A-10 A at 50 Hz.