Planar magnetic core and circuit board applying magnetic core

Abstract

The invention discloses a planar magnetic core. Side plates have L-shaped structures consisting of long plates and short plates; the two side plates are positioned on both sides of a bottom plate in the length direction, and are vertical to the bottom plate; the long plate directions of the side plates are consistent with the width direction of the bottom plate, and the lengths of the long plates are equal to the width of the bottom plate; the short plates of the two side plates are positioned on the same side of the bottom plate; the length-width direction of a winding post is consistent with the length-width direction of the bottom plate; the distances D1 between the two ends of the winding post in the width direction and the two side plates D1 are smaller than the length R1 of the winding post; the distances D2 between both sides of the winding post in the length direction and both sides of the bottom plate in the length direction are smaller than the width R2 of the winding post; two grooves are formed in the bottom plate by extending from the two side faces of the winding post in the length direction to both sides of the bottom plate. According to the planar magnetic core disclosed by the invention, the magnetic core is reasonable in structural layout and large in the effective working area, so that the problem of divergence of coil magnetic induction lines on the root of the winding post is solved, and the stability and reliability of the electromagnetic property of the magnetic core are improved. The invention further provides a circuit board in which the planar magnetic core is applied.

Description

technical field [0001] The invention relates to the technical field of magnetic cores, in particular to a planar magnetic core and a circuit board using the magnetic core. Background technique [0002] The magnetic core is a sintered magnetic metal oxide composed of various iron oxide mixtures. In the prior art, ferrite magnetic cores are used in coils and transformers of various electronic devices. For example, manganese-zinc ferrite and nickel-zinc ferrite are typical magnetic core materials. Among them, manganese-zinc ferrite has the characteristics of high magnetic permeability and high magnetic flux density, and has a relatively high magnetic flux density when the frequency is lower than 1MHz. Low loss characteristics, nickel-zinc ferrite has extremely high resistivity, low magnetic permeability of less than a few hundred, and low loss at frequencies higher than 1MHz. [0003] The material and structure of the magnetic core are important factors affecting the performan...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention proposes a planar magnetic core, which has a reasonable structural layout, a large effective working area, solves the problem of the divergence of the magnetic induction lines of the coil at the root of the winding post, and improves the magnetic core performance. The stability and reliability of the electromagnetic characteristics

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