Device for measuring an electric current using a solenoid with r

Inductor devices – Interlinked coils or windings – Coil surrounding linear conductor

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324127, 336180, 336229, H01F 2730, H01F 4006

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active

050122185

ABSTRACT:
A device for measuring electric current includes a toric core having a gap that establishes a pair of opposed end faces, and a continuous conductor having terminal ends and wound around the core in contiguous turns forming a toric solenoid interrupted by the gap. The solenoid has first and second ends adjacent the respective end faces of the core, and the conductor at each end of the solenoid passes through the core and extends along the axis thereof from the opposed end faces of the core such that the terminal ends of the conductor are located diametrically opposite the gap. A first compensation coil is serially connected to said first end of the solenoid such that the first coil overlies the first end of the solenoid to which the first compensation coil is connected.

REFERENCES:
patent: 723016 (1903-03-01), Parcelle
patent: 1862613 (1932-06-01), Tomoda
patent: 2916696 (1959-12-01), Schonstedt
patent: 2958835 (1960-11-01), Kolb, Jr.
patent: 4390813 (1983-06-01), Stanley
S. Seely, "Effect of Stray Flux on Current Transformers", Journal of Science & Technology, vol. 37, No. 3, 1970.

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