Bias magnetic core and circuit board applying magnetic core

Abstract

The invention discloses a bias magnetic core. A winding post is an upright post of which the bottom surface is a rounded rectangle; side plates have L-shaped structures; the winding post is positioned on the middle part of a bottom plate, and is consistent with the bottom plate in the length and width directions; the two side plates are positioned on both sides of the bottom plate in the width direction; the distances between the two ends of the winding post in the width direction and long plates of the two side plates are smaller than the length of the winding post; the distance L2 between one side of the winding post in the length direction and the side A of the bottom plate in the length direction is equal to D1; the distance D3 between the other side of the winding post in the length direction and a side B, which is opposite to the side A, of the bottom plate in the length direction is smaller than D2; the inner side faces of the L-shaped structures of the side plates are in smooth transition. According to the bias 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 bias magnetic core is applied.

Description

technical field [0001] The invention relates to the technical field of magnetic cores, in particular to a bias 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 performance...

AI Technical Summary

Problems solved by technology

Conventional ferrite cores, the effective working area of ​​the core is small, it is not easy to wind the coil, and the magnetic shielding is also poor.

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