Low-loss soft magnet

Abstract

The utility model discloses a low-loss soft magnet, relates to the technical field of soft magnetic materials, and aims to provide a soft magnetic material with high magnetic conductivity, high saturation magnetic flux density and low loss, which comprises a membrane group, the membrane group is formed by stacking a plurality of Fe-based amorphous layers and a plurality of Cu layers, the Fe-based amorphous layers and the Cu layers are alternately arranged to form a sandwich structure, and the Fe-based amorphous layers and the Cu layers are arranged in a staggered manner to form a magnetic core. The Fe-based amorphous layers are used for providing high-saturation magnetic induction, the Cu layers are used for blocking an interlayer eddy current path, the film group is formed by alternately stacking the multiple Fe-based amorphous layers and the multiple Cu layers, the high-saturation magnetic induction is provided through the Fe-based amorphous layers, the interlayer eddy current path is blocked through the Cu layers, and eddy current loss is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to soft magnetic material technical field more specifically, it relates to a kind of low-loss soft magnetic body. BACKGROUND

[0002] With the rapid development of electronic information industry, various electronic equipment and electrical equipment demand high-frequency inductance components increasing, such as high-frequency transformer, small inductor etc. These high-frequency inductance components play a vital role in communication, power electronics, computer and other fields. And magnetic core as the main component of high-frequency inductance component, its performance directly affects the performance and efficiency of the whole component.

[0003] Soft magnetic material is widely used in the manufacture of magnetic core due to its low coercivity and high permeability. However, with the continuous progress of technology, the performance requirements of soft magnetic material and magnetic core component are also increasing. At present, the existing soft magnetic material and magnetic core component on the market generally have insufficient performance. The performance indicators such as permeability and saturation flux density of traditional soft magnetic material under high frequency are difficult to meet the demand of high-frequency inductance component, resulting in low efficiency and large loss of the component when working at high frequency.

[0004] Therefore, in order to meet the high performance requirements of electronic information industry on high-frequency inductance component, it is urgent to develop a new type of soft magnetic material and magnetic core component to solve the problems existing in the prior art. The utility model aims to provide a soft magnetic material and magnetic core component with high permeability, high saturation flux density, low loss, miniaturization, sheet type and other advantages to meet the demand of high-frequency inductance component in high frequency, high performance and low loss. SUMMARY

[0005] In view of the problems existing in the prior art, the utility model provides a low-loss soft magnetic body to solve the technical problems mentioned in the background art.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: a low-loss soft magnetic body, comprising a film group, the film group is stacked by multiple layers of Fe-based amorphous layers and multiple layers of Cu layers, wherein the Fe-based amorphous layers and the Cu layers are arranged alternately to form a sandwich structure, the Fe-based amorphous layers are used to provide high saturation magnetic induction, and the Cu layers are used to block the interlayer eddy current path.

[0007] The utility model is further provided with an insulating layer coated on the film group.

[0008] The utility model is further provided with an air gap in the film group, and the through direction of the air gap is the same as the stacking direction of the film group.

[0009] The utility model is further provided with an epoxy resin filler in the air gap.

[0010] The air gap is provided with a plurality of air gaps, and is distributed on the membrane group.

[0011] Compared with the prior art, the low-loss soft magnetic body has the following beneficial effects:

[0012] 1. The application includes a membrane group formed by alternately stacking a plurality of Fe-based amorphous layers and a plurality of Cu layers, the Fe-based amorphous layers provide high saturation magnetic induction, and the Cu layers block the interlayer eddy current path to reduce eddy current loss.

[0013] 2. The application provides an air gap in the direction perpendicular to the Fe-based amorphous layer and the Cu layer, which can effectively divide the magnetic circuit, form a periodic discontinuous magnetic circuit, and reduce the risk of local magnetic flux density saturation.

[0014] 3. The application fills the air gap with an epoxy resin filler, which can avoid air breakdown and stabilize the structure. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is an overall structure schematic diagram of the insulation layer in a cross-sectional state.

[0016] Fig. 2 It is a structure schematic diagram of the membrane group in the application.

[0017] Fig. 3 It is an explosion structure schematic diagram of the Fe-based amorphous layer and the Cu layer in the application.

[0018] In the figure: 1, membrane group; 101, Fe-based amorphous layer; 102, Cu layer; 103, air gap; 2, insulation layer; 3, epoxy resin filler. DETAILED DESCRIPTION

[0019] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict. The application will be described in detail below with reference to the accompanying drawings and embodiments.

[0020] It should be noted that, unless otherwise specified, all technical and scientific terms used in the application have the same meaning as generally understood by those skilled in the art to which the application belongs.

[0021] In the application, unless otherwise specified, the orientation such as "up, down" is generally with respect to the direction shown in the drawings, or with respect to the vertical, perpendicular or gravitational direction; similarly, for the convenience of understanding and description, "left, right" is generally with respect to the left and right shown in the drawings; "inner, outer" refers to the inner and outer of the contour of each component itself, but the above orientation words are not used to limit the application.

[0022] Please refer to Figs. 1-3 , low-loss soft magnetic body, comprising a film group 1, the film group 1 is stacked by a plurality of Fe-based amorphous layers 101 and a plurality of Cu layers 102, wherein the Fe-based amorphous layers 101 and the Cu layers 102 are arranged alternately to form a sandwich structure, the Fe-based amorphous layers 101 are used to provide high saturation magnetic induction, and the Cu layers 102 are used to block the interlayer eddy current path.

[0023] In a specific application, the Fe-based amorphous layers 101 and the Cu layers 102 are deposited layer by layer by a magnetron sputtering device, and 50 layers are deposited alternately to form the film group 1.

[0024] In the embodiment, the film group 1 has air gaps 103, the through direction of the air gaps 103 is the same as the stacking direction of the film group 1, the air gaps 103 have epoxy resin fillers 3, and the air gaps 103 are provided with a plurality of air gaps 103 and are distributed on the film group 1.

[0025] In a specific application, a plurality of air gaps 103 are cut in a direction perpendicular to the Fe-based amorphous layers 101 and the Cu layers 102 by using a laser cutting method, so as to divide the magnetic circuit and form a periodic discontinuous magnetic circuit.

[0026] In the embodiment, the film group 1 is coated with an insulating layer 2, and the insulating layer 2 is an insulating layer.

[0027] In a specific application, the film group 1 is coated with an insulating layer 2, and the insulating layer 2 is an insulating layer, so as to improve the breakdown voltage to 3kV / mm.

[0028] In all the above-mentioned solutions, although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A low-loss soft magnetic material, characterized in that, The membrane group (1) consists of multiple Fe-based amorphous layers (101) and multiple Cu layers (102) stacked together, wherein the Fe-based amorphous layers (101) and Cu layers (102) are arranged alternately. The Fe-based amorphous layer (101) is used to provide high saturation magnetic induction. The Cu layer (102) is used to block the interlayer eddy current path.

2. The low-loss soft magnet according to claim 1, characterized in that, The membrane assembly (1) is coated with an insulating layer (2).

3. The low-loss soft magnet according to claim 1, characterized in that, The membrane assembly (1) has an air gap (103), and the direction of the air gap (103) is the same as the stacking direction of the membrane assembly (1).

4. A low-loss soft magnet according to claim 3, characterized in that, The air gap (103) contains epoxy resin filler (3).

5. A low-loss soft magnet according to claim 4, characterized in that, The air gap (103) has several openings, and they are all distributed on the membrane group (1).

6. A low-loss soft magnetic material according to claim 2, characterized in that, The insulating layer (2) is Insulating layer.

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