G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 19/10 (2006.01) G01R 15/18 (2006.01) H01F 38/30 (2006.01)
Patent
CA 2120451
DIFFERENTIAL CURRENT SENSING METHOD AND APPARATUS Abstract of the Disclosure A current sensor includes first and second conductors and an annular current comparator magnetically coupled to the first and second conductors for producing an output signal related in magnitude and phase to an input current. The first and second conductors have first and second predetermined resistances, respectively, for conducting first and second portions of the input current along first and second directions, respectively. The first direction is substantially opposite the second direction within a bore of the annular current comparator. A current is induced in the annular current comparator, preferably a toroidal winding, in relation to the current difference between the first and second portions of the input current. Secondary windings, preferably feedback and sense secondary windings, are wound about and magnetically coupled to the annular current comparator for producing an output signal responsive to the current induced within the annular current comparator while preventing the annular current comparator from being saturated.
Company General Electric
Craig Wilson And Company
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