CN202887926U - Magnetic element - Google Patents
Magnetic element Download PDFInfo
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- CN202887926U CN202887926U CN 201220547357 CN201220547357U CN202887926U CN 202887926 U CN202887926 U CN 202887926U CN 201220547357 CN201220547357 CN 201220547357 CN 201220547357 U CN201220547357 U CN 201220547357U CN 202887926 U CN202887926 U CN 202887926U
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- magnetic core
- magnetic
- bonding
- medium element
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Abstract
The utility model discloses a magnetic element which comprises a first magnetic core, a second magnetic core and a medium element. The medium element is mounted between the first magnetic core and the second magnetic core and enables a gap to be formed between the first magnetic core and the second magnetic core, and a through hole is formed in the medium element and filled with bonding materials which are respectively bonded with the first magnetic core and the second magnetic core. The magnetic element has the advantages that the through hole is formed in the medium element, bonding area of the bonding materials and the medium element can be enlarged, a bonding column is formed between the contact surfaces, and therefore, under the effect of external force, relative slide of the magnetic cores and the medium element is not prone to happen compared with an existing method that magnetic core elements are bonded through paper, adhesive tapes and other medium materials. Therefore, the magnetic element has the advantages of being strong in bonding, even in bonding force, convenient to produce, high in reliability and the like.
Description
Technical field
The utility model relates to electronic devices and components, is specifically related to a kind of magnetic element.
Background technology
In the magnetic elements such as inductance and transformer, air gap is a very important parameter, and it all has a great impact inductance value, saturation current, the frequency characteristic of perceptual device.Therefore the material, size, position, the adhesive strength that consist of air gap are the objects that needs priority control in the magnetic device production.
At present, often adopt the control such as the method for adding the scraps of paper, adhesive tape between magnetic core thickness for the magnetic device that needs air gap, the use of these materials has reduced local bonding area, causes bonding inhomogeneities, and when assembling, slide easily, cause product appearance and electrical characteristic bad.
And for the magnetic core that three contact-making surfaces are arranged, the air gap that obtains that adopts center pillar to be higher than or be lower than two contact-making surfaces in outside is arranged also, but the air gap of this moment is all opened large many of air gap than three parts, causes larger leakage flux.When coil and air gap near the time, leakage flux can be produced eddy current at coil, thereby produces very large eddy current loss, causes device heating, reduces the operating efficiency of magnetic device.
The utility model content
For the electric property that solves the magnetic element that utilizes the scraps of paper, adhesive tape etc. to control air gap in the prior art and the technical problem of bad order, the utility model provides a kind of magnetic element.
A kind of magnetic element, comprise the first magnetic core and the second magnetic core, also comprise medium element, described medium element is installed between described the first magnetic core and the second magnetic core and makes has air gap between the first magnetic core and the second magnetic core, described medium element is provided with through hole, filled up adhesion substance in the described through hole, described adhesion substance is bonding with the first magnetic core and the second magnetic core respectively.
In more excellent scheme, described medium element is ceramic wafer, and usually, the permeability of ceramic wafer is much smaller than the first magnetic core and the second magnetic core, such as nonmagnetic dielectric-slab.
In more excellent scheme, described the first magnetic core has the corresponding faying face of many groups with the second magnetic core, is provided with described medium element between every group of corresponding faying face place.
In more excellent scheme, at each group faying face and in the direct relative zone of the first magnetic core and the second magnetic core, the first magnetic core is bonding by adhesion substance and the second magnetic core.
In more excellent scheme, between medium element and surface the first magnetic core and/or the second magnetic core and that medium element is relative, has the uniform adhesion substance of one deck.
In more excellent scheme, the thickness of described medium element is between 0.01mm to 10mm.
In more excellent scheme, the diameter of described through hole is between 0.01mm to 10mm.
The beneficial effects of the utility model are: by at medium element through hole being set, so that adhesion substance can increase the bond area with medium element, and provide a bond post between contact-making surface, so that under the effect of external force, compare with adopting the scraps of paper, adhesive tape etc. between the magnetic core element dielectric material is bonding, the area that contacts by adhesion substance between this magnetic core and the medium element is larger, thereby the more difficult relative sliding that occurs, therefore, it is large that this magnetic element has adhesive strength, bonding force is even, convenient for production, the reliability high.
Description of drawings
Fig. 1 is the schematic top plan view of the medium element of a kind of embodiment of the utility model;
Fig. 2 is the schematic side view of Fig. 1;
Fig. 3 is the first magnetic core of magnetic element of a kind of embodiment and the assembling schematic diagram of the second magnetic core;
Fig. 4 is the assembling schematic diagram of magnetic element shown in Figure 3;
Fig. 5 is the first magnetic core of magnetic element of another kind of embodiment and the assembling schematic diagram of the second magnetic core;
Fig. 6 is the assembling schematic diagram of magnetic element shown in Figure 5;
Fig. 7 is the first magnetic core of magnetic element of another kind of embodiment and the assembling schematic diagram of the second magnetic core;
Fig. 8 is the assembling schematic diagram of magnetic element shown in Figure 7.
Embodiment
Below with reference to accompanying drawing, specific embodiment of the utility model is described in further detail.
As shown in Figures 1 to 4, the magnetic element of a kind of embodiment, comprise the upper magnetic core of the first magnetic core 20(), magnetic core under the second magnetic core 21(), medium element 10, coil 30, wherein, medium element 10 is provided with through hole 11, the first magnetic core 20 and the second magnetic core 21 are the L-type that cooperatively interacts, wherein, end face 20A of the first magnetic core 20 and an end face 21A of the second magnetic core 21 are one group of faying faces, medium element 10 is bonding with end face 20A and end face 21A respectively by adhesion substance, the through hole 11 of medium element 10 has filled up adhesion substance, the adhesion substance at the two ends of through hole 11 is bonding with end face 20A and 21A respectively, like this, this faying face place has namely formed an air gap of magnetic element, and coil 30 can be around the first magnetic core 20 or the second magnetic core 21 places, and a part is between the first magnetic core 20 and the second magnetic core 21.
Like this, the area that contacts by adhesion substance between the first magnetic core 20 and the second magnetic core 21 and the medium element 10 is larger, is not easy to produce the relative sliding that is parallel to the contact-making surface direction between the first magnetic core 20 and the second magnetic core 21 and the medium element 10; Especially after adhesion substance condenses (after oven dry), because the adhesion substance in through hole 11 plays the effect of a similar pillar, more difficult generation is parallel to the relative sliding of contact-making surface direction between the first magnetic core 20 and the second magnetic core 21 and the medium element 10, and destroys electric property and the outward appearance of magnetic element.
Wherein, medium element 10 can be ceramic wafer 10, this ceramic material can adopt zirconium dioxide, alundum (Al2O3) etc., and because magnetic core generally also is magnetic metal oxide, the coefficient of expansion of ceramic wafer 10 and the first magnetic core and the second magnetic core approaches like this, in the situation of temperature shock and mechanical oscillation, guarantee bonding good.Adhesion substance can be the sticking materials of tool such as glue.The wire that forms coil 30 can be that the circle line also can be flat wire.
A lot of through holes 11 are distributing on the ceramic wafer 10, the diameter dimension of these through holes is between 0.1-10mm (a few tenths of millimeter is to several millimeters) usually, and how the distributing and what of through hole 11, by relative area and the determining positions of the first magnetic core with second magnetic core at its residing faying face place.Needing bonding position to punch, need not punch in unwanted place.More than the through hole 11, the glue that penetrates ceramic wafer 10 is more.The size in hole is larger, and glue is easier to be penetrated.
The area of ceramic wafer 10 can be identical with the area of end face 21A with the end face 20A that is in contact with it, and sometimes in order to increase the direct bond area of glue, the area of ceramic wafer 10 also can less than the area of end face 20A and end face 21A, make part glue directly bonding the first magnetic core 20 and the second magnetic core 21.
After the coil good coiling 30 and the ceramic wafer 10 that needs assembling place, the ceramic wafer 10 that is equipped with through hole 11 is immersed in the glue, perhaps glue is placed on the surface of ceramic wafer 10, with glue scraping plate glue was scraped on the surface of ceramic wafer 10, make glue even in ceramic wafer 10 surface distributed, can penetrate in the through hole 11 of ceramic wafer 10 by some glue simultaneously.When producing, ceramic wafer 10 is placed between the upper and lower magnetic core, fixing, baking.At this moment the glue of the upper and lower surface of ceramic wafer 10 and aperture is just good bonding of magnetic core up and down, porcelain plate three.The air gap of magnetic device is the thickness of ceramic wafer 10 substantially.
As illustrated in Figures 5 and 6, the magnetic element of another kind of embodiment, comprise the first magnetic core 22 that is strip and the second magnetic core 23 that is concave shape, the second magnetic core 23 comprises recess 23C and gives prominence to respectively end face 23A and the end face 23B of recess 23C, usually, two outstanding height of end face are identical, this magnetic element has two groups of faying faces, wherein one group of faying face is, end face 23A is bonding by medium element 10 and the first magnetic core 22, and another group faying face is, end face 23B is bonding by medium element 10 and the first magnetic core 22, bonding mode is identical with specific embodiment 1, and medium element 10 also can be identical with a upper embodiment, the recess 23C of coil 31 pile warps the second magnetic core.
Shown in Fig. 7 and 8, the magnetic element of another kind of embodiment, comprise the first magnetic core 24, the second magnetic core 25 and coil 32, wherein the second magnetic core 25 is similar E type, namely have two recesses, with three end face 25A that give prominence to respectively recess, end face 25B, end face 25C, and general outstanding height is identical, this magnetic element has three groups of faying faces, wherein one group of faying face is, end face 25A is bonding by medium element 10 and the first magnetic core 24, another group faying face is, end face 25B is bonding by medium element 10 and the first magnetic core 24, and another group faying face is that end face 25C is bonding by medium element 10 and the first magnetic core 24, bonding mode is identical with specific embodiment 1, medium element 10 also can be identical with upper two embodiment, and coil 32 is wound on projection corresponding to end face 25A, and two line ends also can reflexed be fixed on the bottom of the second magnetic core 25.In the real transformer magnetic core, the shape and size of this type of magnetic core are thousands of, and common shape has EE, EPC, EI, PQ etc.
Magnetic device for more bonding plane also can be by above-mentioned method control air gap.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that implementation of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (7)
1. magnetic element, comprise the first magnetic core and the second magnetic core, it is characterized in that: also comprise medium element, described medium element is installed between described the first magnetic core and the second magnetic core and makes has air gap between the first magnetic core and the second magnetic core, described medium element is provided with through hole, filled up adhesion substance in the described through hole, described adhesion substance is bonding with the first magnetic core and the second magnetic core respectively.
2. magnetic element as claimed in claim 1, it is characterized in that: described medium element is that magnetic permeability is less than the ceramic wafer of the first magnetic core and the second magnetic core.
3. magnetic element as claimed in claim 1 is characterized in that: described the first magnetic core has the corresponding faying faces of many groups with the second magnetic core, is provided with described medium element between every group of corresponding faying face place.
4. magnetic element as claimed in claim 3 is characterized in that: at each group faying face and in the direct relative zone of the first magnetic core and the second magnetic core, the first magnetic core is bonding by adhesion substance and the second magnetic core.
5. magnetic element as claimed in claim 1 is characterized in that: have the uniform adhesion substance of one deck between medium element and surface the first magnetic core and/or the second magnetic core and that medium element is relative.
6. such as the arbitrary described magnetic element of claim 1 to 5, it is characterized in that: the thickness of described medium element is between 0.01mm to 10mm.
7. such as the arbitrary described magnetic element of claim 1 to 5, it is characterized in that: the diameter of described through hole is between 0.01mm to 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220547357 CN202887926U (en) | 2012-10-24 | 2012-10-24 | Magnetic element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220547357 CN202887926U (en) | 2012-10-24 | 2012-10-24 | Magnetic element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202887926U true CN202887926U (en) | 2013-04-17 |
Family
ID=48079324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220547357 Expired - Lifetime CN202887926U (en) | 2012-10-24 | 2012-10-24 | Magnetic element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202887926U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106685107A (en) * | 2015-11-06 | 2017-05-17 | 三星电机株式会社 | Magnetic sheet and wireless power charging device |
-
2012
- 2012-10-24 CN CN 201220547357 patent/CN202887926U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106685107A (en) * | 2015-11-06 | 2017-05-17 | 三星电机株式会社 | Magnetic sheet and wireless power charging device |
| CN106685107B (en) * | 2015-11-06 | 2020-04-21 | 株式会社Wits | Magnetic sheet and wireless charging device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130417 |
|
| CX01 | Expiry of patent term |