過電流検出機能付き電流センサ

摘要

PROBLEM TO BE SOLVED: To provide a current sensor with an overcurrent detection function which allows quick detection of an overcurrent flowing in a measured current line.;SOLUTION: A current sensor with an overcurrent detection function comprises: a magnetic detection circuit 10 detecting an induction field generated by a current flowing in a measured current line; a balance controlling amplifier 20 operating on the basis of output of the magnetic detection circuit 10; a feedback coil 30 generating a magnetic field that eliminates the induction field, on the basis of output of the balance controlling amplifier 20; a current detection part 40 outputting a signal according to a current flowing in the feedback coil 30; and a determination circuit part 50 determining an overcurrent on the basis of voltage generated in the feedback coil 30.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT