Sensitive current sensor based on Fe_73.5Cu₁Nb₃Si_13.5B₉/Pb(Zr,Ti)O₃ composite with a tunable magnetic flux...

This paper presents a sensitive current sensor based on magnetoelectric composite Fe_73.5Cu₁Nb₃Si_13.5B₉/Pb(Zr,Ti)O₃ with a tunable magnetic concentrator. The concentrator with a movable magnetic plate can enable the DC bias magnetic field (H_dc) to become tunable to meet the needed optimal H_dc of Fe_73.5Cu₁Nb₃Si_13.5B₉/Pb(Zr,Ti)O₃ and to reduce the magnetoresistance of the magnetic loop. Furthermore, the sensor's resonant frequency is adjustable to improve the sensitivity for measuring current at different frequencies. From experiments, the proposed sensor has a sensitivity of ∼246.71 mV/A and a linearity of ∼0.98% at 50 Hz current. The results indicate that the proposed current sensor is ideally suited for current-monitoring.