Magnetic core with magnetic ribbon in gap thereof

Details Magnetic core with magnetic ribbon in gap thereof Magnetic core with magnetic ribbon in gap thereof

H - Electricity

01

F

336/69

H01F 17/06 (2006.01) H01F 3/14 (2006.01) H01F 27/24 (2006.01) H01F 27/34 (2006.01)

Patent

CA 1115793

MAGNETIC CORE WITH MAGNETIC RIBBON IN GAP THEREOF Abstract of the Disclosure A ferrite toroid has two radially extending gaps. Into each gap there is inserted a magnetic metal ribbon folded over an insulative shim. When current is applied to a winding on the core, the resultant magnetic flux is steered into the magnetic ribbons and around the gaps. For high frequency excitations, eddy current losses in the ribbons are high and the windings have low Q, but high inductance. At high winding currents, the magnetic ribbons are saturated, the inductance is reduced, and the Q of the winding increases. In a switching voltage regulator, this inductor tends to generate only a small amount of ringing and electromagnetic radiation noise.

342202

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