Patent ID: 6603307
Filing Date: 2003-08-05
Classification: G01R

Abstract:
A magnetic flux detector comprising:a magnetic flux generator, which generates a magnetic flux; a search coil, which is placed in a magnetic path where the magnetic flux generated by said magnetic flux generator passes, such that an electromotive force is induced in said search coil in response to a change in the magnetic flux; and a magnetic flux calculator, which determines the magnitude of the magnetic flux generated by said magnetic flux generator by measuring the electromotive force induced in said search coil, said magnetic flux calculator having an inlet for connection to said search coil; wherein: a potential setup resistor with a resistance larger than an internal resistance of said search coil is provided at the inlet of said magnetic flux calculator, and said magnetic flux generator comprises a ring-like core member having a horizontally laid U-shaped cross section, a ring-like exciting coil, which is provided in a groove of said core member defined by the horizontally laid U-shaped cross section, and a disk-like armature member, which is provided facing an opening side of the horizontally laid U-shaped cross section of said core member; and said search coil comprises a ring-like coil which is provided adjacent to said exciting coil in said groove of said core member.