Patent ID: 6989666
Filing Date: 2006-01-24
Classification: G01R

Abstract:
1. A current sensor using a magnetic detection device having a magnetic body adapted to allow high frequency currents to directly flow through it and change its magnetic permeability in response to the external magnetic field, said sensor comprising: parallel electric wire sections of a pair of electric wires arranged in parallel wit each other and adapted to flow respective electric currents of the same intensity in directions opposite to each other, wherein said magnetic detection device has a magnetic field detecting direction rectangular relative to a prolonged line connecting centers of said parallel electric wire sections and is adapted to detect the difference between the magnetic field formed by the parallel electric wire section located close to the magnetic detection device and the magnetic field formed by the parallel electric wire section located remote from the magnetic detection device and directed oppositely relative to the former magnetic field in order to detect the intensity of the electric currents flowing through said parallel electric wire sections, wherein the parallel electric wire section locate close to said magnetic detection device and the parallel electric wire section located remote from said magnetic detection device are coupled at respective one ends thereof within the sensor.