LOOP CORE FOR FLUX GATE CURRENT SENSOR AND FLUX GATE CURRENT SENSOR

摘要

A loop core for a flux gate current sensor has a pair of substantially 3-shaped cores in which two plate shapes each bent in a substantial U-shape are integrally coupled to each other. The pair of cores are disposed facing each other so that: the first outer leg portions thereof at least partially contact each other; the second outer leg portions thereof contact each other while being at least partially overlapped with each other in the plate thickness direction of the second outer leg portions; and a ring-shaped loop, certain parts of which are narrowed while maintaining a predetermined gap, is formed between the mutual coupling portions of the two U-shapes. Taking the gap portion as a boundary, the ring-shaped loop has a first ring portion on the first outer leg portion side and a second ring portion on the second outer leg portion side, the first ring portion specifying a space through which a wire to be measured is inserted and made to pass, the second ring portion specifying a space in which a magnetic probe for detecting a magnetic field induced by the current flowing through the wire is disposed.