CN216597173U

CN216597173U - Magnetic core structure for inhibiting magnetic leakage

Info

Publication number: CN216597173U
Application number: CN202123183242.3U
Authority: CN
Inventors: 陈为; 陈凌锋
Original assignee: Fuzhou University
Current assignee: Fuzhou University
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-05-24
Anticipated expiration: 2031-12-17

Abstract

The present invention relates to a magnetic core structure for suppressing magnetic leakage, including an annular core portion made of a magnetic material, a good conductor layer made of a good conductor material covering the entire or partial outer surface of the annular core portion, and an insulating material layer made of an insulating material covering the entire outer peripheral portions of the annular core portion and the good conductor layer. The magnetic core structure is advantageous for suppressing magnetic field leakage.

Description

Magnetic core structure for inhibiting magnetic leakage

Technical Field

The utility model belongs to the technical field of wireless communication, and particularly relates to a magnetic core structure for inhibiting magnetic flux leakage.

Background

Magnetic field leakage can be generated in the surrounding space when the magnetic element works, the magnetic field leakage is particularly serious when the magnetic element works at high frequency, near field coupling can be caused by the leakage of the high frequency magnetic field, and the performance of a device can be reduced or even the normal work of a circuit can be influenced by the near field coupling.

Existing magnetic field shielding solutions typically add shielding outside the already fabricated magnetic element. The shielding material includes a magnetically permeable material and an electrically conductive material. Good conductor materials have the characteristics of good ductility and easy manufacturing of shielding shapes, and are widely applied to shielding high-frequency magnetic fields. Adding a shield outside the magnetic element has the following disadvantages: 1. sufficient space is required for the outside. The shape of the additional shield is difficult to fit the magnetic piece, which causes space waste. 2. The addition of shields can affect the heat dissipation of the magnetic elements, leading to thermal problems. 3. Due to safety requirements, additional shielding requires the addition of insulation, which reduces the reliability of the device. 4. The addition of the external shield can make the circuit parameters of the actual operation of the components different from the circuit parameters of the design stage. The distance between the shield and the magnetic member affects the magnitude of the electrical parameter, and the distance is not well designed.

Disclosure of Invention

The present invention aims to provide a magnetic core structure that suppresses magnetic leakage and is advantageous in suppressing magnetic field leakage.

In order to achieve the purpose, the utility model adopts the technical scheme that: a magnetic core structure for suppressing leakage flux includes an annular core portion made of a magnetic material, a good conductor layer made of a good conductor material covering all or part of the outer side surface of the annular core portion, and an insulating material layer made of an insulating material covering the entire outer peripheral portions of the annular core portion and the good conductor layer.

Further, the entire outer peripheral portion of the annular core portion is covered with a good conductor layer, and the entire outer peripheral portion of the good conductor layer is covered with an insulating material layer.

Further, the good conductor layer at the outer peripheral portion of the annular core portion is uniform in thickness.

Further, the upper side, the lower side and the outer side of the annular core are covered with a good conductor layer, the inner side is not covered with a good conductor layer, and the whole periphery of the annular core, which is partially covered with the good conductor layer on the outer side, is covered with an insulating material layer.

Further, the upper side portion, the lower side portion and the outer side portion of the annular core portion are covered with a good conductor layer, the inner side portion is not covered with the good conductor layer, and the entire outer peripheral portion of the annular core portion, part of the outer side surface of which is covered with the good conductor layer, is covered with an insulating material layer.

Further, the thickness of the good conductor layer on the upper side part, the lower side part and the outer side part of the annular core part is uniform.

Compared with the prior art, the utility model has the following beneficial effects: a magnetic core structure in which a good conductor layer is added between a core portion and an insulating layer, and leakage of a high-frequency magnetic field is effectively suppressed by utilizing the characteristic that an eddy current is generated when a magnetic field passes through the good conductor, and the anti-interference capability of a magnetic material is also improved. Compared with the traditional magnetic core, the structure has more excellent magnetic field leakage suppression characteristic.

Drawings

FIG. 1 is a front view of a prior art magnetic core structure;

FIG. 2 is a top view of a prior art magnetic core structure;

FIG. 3 is a cross-sectional view of a prior art magnetic core structure;

FIG. 4 is a front view of a magnetic core structure according to a first embodiment of the present invention;

FIG. 5 is a top view of a magnetic core structure according to a first embodiment of the present invention;

FIG. 6 is a cross-sectional view of a magnetic core structure according to a first embodiment of the present invention;

FIG. 7 is a front view of a magnetic core structure according to a second embodiment of the present invention;

FIG. 8 is a top view of a magnetic core structure according to a second embodiment of the present invention;

fig. 9 is a cross-sectional view of a magnetic core structure according to a second embodiment of the present invention.

Detailed Description

The utility model is further explained below with reference to the drawings and the embodiments.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The conventional magnetic core structure is formed by covering the entire outer circumference of a magnetic core material with an insulating material layer. The structure is shown in fig. 1-3.

The present embodiment provides a magnetic core structure for suppressing leakage flux, including an annular core portion 1 made of a magnetic material, a good conductor layer 2 made of a good conductor material covering all or part of the outer side surface of the annular core portion 1, and an insulating material layer 3 made of an insulating material covering the entire outer peripheral portions of the annular core portion 1 and the good conductor layer 2.

As shown in fig. 4 to 6, in the first embodiment, the entire outer peripheral portion of the annular core portion 1 is covered with a good conductor layer 2, and the entire outer peripheral portion of the good conductor layer 2 is covered with an insulating material layer 3. The good conductor layer at the outer periphery of the annular core portion has a uniform thickness.

As shown in fig. 7 to 9, in the second embodiment, the upper side portion, the lower side portion, and the outer side portion of the annular core portion 4 are each covered with a good conductor layer 5, the inner side portion is not covered with the good conductor layer 5, and the entire outer peripheral portion of the annular core portion partially covered with the good conductor layer is covered with an insulating material layer 6. The thickness of the good conductor layer on the upper side part, the lower side part and the outer side part of the annular core part is uniform.

When the magnetic core is manufactured, after the annular core part of the magnetic core is manufactured, good conductor materials are added on the surface of the annular core part according to requirements, and then insulating materials are added on the surfaces.

The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the utility model may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.

Claims

1. A magnetic core structure for suppressing leakage flux is characterized by comprising an annular core portion made of a magnetic material, wherein the whole or part of the outer side surface of the annular core portion is covered with a good conductor layer made of a good conductor material, and the whole outer peripheral portions of the annular core portion and the good conductor layer are covered with an insulating material layer made of an insulating material.

2. The magnetic core structure of suppressing leakage flux according to claim 1, wherein an entire outer peripheral portion of said annular core portion is covered with a good conductor layer, and an entire outer peripheral portion of said good conductor layer is covered with an insulating material layer.

3. The magnetic core structure suppressing leakage flux according to claim 2, wherein the good conductor layer in the outer peripheral portion of the annular core portion has a uniform thickness.

4. The magnetic core structure of suppressing leakage flux according to claim 1, wherein the upper side portion, the lower side portion, and the outer side portion of the annular core portion are each covered with a good conductor layer, the inner side portion is not covered with a good conductor layer, and the entire outer peripheral portion of the annular core portion, which is partially covered with a good conductor layer at the outer side surface, is covered with an insulating material layer.

5. The magnetic core structure for suppressing magnetic leakage according to claim 4, wherein the thicknesses of the good conductor layers of the upper side portion, the lower side portion, and the outer side portion of the annular core portion are uniform.