CN104752036A - Transformer with embedded magnetic gum - Google Patents
Transformer with embedded magnetic gum Download PDFInfo
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- CN104752036A CN104752036A CN201510177725.2A CN201510177725A CN104752036A CN 104752036 A CN104752036 A CN 104752036A CN 201510177725 A CN201510177725 A CN 201510177725A CN 104752036 A CN104752036 A CN 104752036A
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Abstract
The invention discloses a transformer with an embedded magnetic gum. The magnetic gum is arranged between a primary coil and a secondary coil of the transformer, so that a resonant inductor can be integrated in the transformer, and the size of the resonant inductor can be controlled by adjusting the magnetic permittivity of the magnetic gum, the thickness of the magnetic gum and the area of the magnetic gum. By the mode, the transformer can decrease the resonant inductor, and cost is reduced. Compared with a simply integrated resonant inductor mode, the transformer is small in size, high in magnetic coupling ability, low in electromagnetic interference, high in transmission efficiency, convenient to manufacture and high in universality.
Description
Technical field
The present invention relates to field transformer, particularly relate to a kind of transformer being embedded with magnetic glue.
Background technology
Power supply, when adopting resonant mode to open up benefit mode, needs to use transformer and resonant inductance.Convention resolution method has two kinds: transformer and resonant inductance independently separate, so not only wasting space, and makes that pcb board cabling is complicated, electromagnetic interference large, causes that product efficiency is low, volume is large, cost is high, difficultly to be tested by EMC.
Wherein resonant inductance is simply integrated in transformer, utilizes the leakage inductance of transformer to do resonant inductance and uses.Adopt tradition namely enamelled wire to be wound on the skeleton of customization around manufacture method, elementary left side or the right side being placed on skeleton, secondary right side or the left side being placed on skeleton, increase elementary leakage inductance to reach the requirement of resonant inductance by the distance strengthened between primary and secondary.This method is optimized than aforesaid way, but or there is lower column defects:
1, transformer of the same race just needs out a frame special to match with it when requiring leakage inductance different, opens seam shut die costly, poor universality;
2, primary and secondary spacing must must be made to widen to strengthen leakage inductance, causing volume of transformer increasing, magnetic coupling ability, transformer efficiency of transmission low;
3, primary and secondary spacing may be strengthened again when resonant inductance is larger and all not reach requirement.
Summary of the invention
In order to overcome above-mentioned deficiency of the prior art, the object of the invention is to, providing a kind of transformer being embedded with magnetic glue, transformer can be made to reduce resonant inductance, and reduce costs, equally compared with simple integrated resonant inductance mode, volume is little, magnetic coupling ability is strong.
For reaching this object, the present invention includes: magnetic core and the primary coil, the secondary coil that are individually fixed on described magnetic core; Magnetic glue is provided with between described primary coil and described secondary coil.
Preferably, described primary coil comprises: primary substrate, is coupled in the elementary coiling on described primary substrate;
Described secondary coil comprises: secondary substrate, is coupled in the secondary rolling thread on described secondary substrate;
Described primary coil and described secondary coil are stacked and placed on described magnetic core, and are provided with space interval between described primary coil and described secondary coil;
Described magnetic glue is inserted in described space interval.
Preferably, the shape of described magnetic glue is strip magnetic glue or ring-type magnetic glue, or polygon-shaped magnetic glue, or irregular magnetic glue.
Preferably, between described primary coil and described secondary coil, be provided with strip magnetic glue described at least one or described ring-type magnetic glue, or described polygon-shaped magnetic glue, or described irregular magnetic glue.
Preferably, described magnetic core is provided with two described primary coils and a described secondary coil;
Described secondary coil is placed between two described primary coils, and is respectively equipped with described magnetic glue between described secondary coil and two described primary coils.
Preferably, secondary coil described in primary coil, described in one and the described magnetic glue be clamped between described primary coil and described secondary coil form a transformation assembly;
On described magnetic core, be provided with transformation assembly described at least one;
When described magnetic core is provided with multiple described transformation assembly, between described transformation assembly and described transformation assembly, be provided with described magnetic glue.
Preferably, described magnetic glue adopts the overall mode inserted to be positioned between described primary coil and described secondary coil, or adopts the mode of gluey perfusion to be placed between described primary coil and described secondary coil.
Preferably, the space interval between described primary coil and described secondary coil is provided with airtight cavity, and described airtight cavity is provided with feed inlet and outlet, and described feed inlet and outlet is for adding or reduce the magnetic glue in described airtight cavity.
Preferably, described magnetic glue constituent comprises: epoxy glue, ferrite, ferrite, ferrocart core, iron sial, iron silicon, iron nickel, iron nickel molybdenum.
Preferably, described magnetic core adopts EE type magnetic core or EI type magnetic core or EC type magnetic core or PQ type magnetic core;
Described primary substrate adopts PCB substrate, or three layer insulation wire line cake, or Copper Foil;
Described secondary substrate adopts PCB substrate, or three layer insulation wire line cake, or Copper Foil.
As can be seen from the above technical solutions, the present invention has the following advantages:
The present invention, by arranging magnetic glue between the primary and secondary coil of transformer, makes resonant inductance can be integrated in transformer, and the size of resonant inductance can by regulating magnetic permeability, the thickness of magnetic glue, the area control of magnetic glue of magnetic glue.This mode can make transformer reduce resonant inductance, reduces costs, equally compared with simple integrated resonant inductance mode, volume is little, magnetic coupling ability is strong, electromagnetic interference is little, transformer efficiency of transmission is high, easy to make, highly versatile.
Accompanying drawing explanation
In order to be illustrated more clearly in technical scheme of the present invention, be briefly described to the accompanying drawing used required in description below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the overall structure figure of transformer in the embodiment of the present invention one;
Fig. 2 is the plan structure figure of transformer in the embodiment of the present invention one;
Fig. 3 is the main TV structure figure of transformer in the embodiment of the present invention one;
Fig. 4 is the chart at the bottom of of transformer in the embodiment of the present invention one;
Fig. 5 is the plan structure figure of transformer in the embodiment of the present invention two;
Fig. 6 is the plan structure figure of transformer in the embodiment of the present invention three;
Fig. 7 is the overall structure figure of transformer in the embodiment of the present invention three;
Fig. 8 is the plan structure figure of transformer in the embodiment of the present invention four;
Fig. 9 is the main TV structure figure of transformer in the embodiment of the present invention four;
Figure 10 is the overall structure figure of transformer in the embodiment of the present invention four;
Figure 11 is the overall structure figure of transformer in the embodiment of the present invention five;
Figure 12 is the chart at the bottom of of transformer in the embodiment of the present invention five;
Figure 13 is the main TV structure figure of transformer in the embodiment of the present invention five.
Embodiment
For making goal of the invention of the present invention, feature, advantage can be more obvious and understandable; specific embodiment and accompanying drawing will be used below; the technical scheme of the present invention's protection is clearly and completely described; obviously; the embodiments described below are only the present invention's part embodiments, and the embodiment of not all.Based on the embodiment in this patent, those of ordinary skill in the art are not making other embodiments all obtained under creative work prerequisite, all belong to the scope of this patent protection.
Be to be understood that, the a certain element of title or layer another element or layer " on ", when being " connected " or " coupled " to another element or layer, it may directly on another element or layer, another element described or layer are connected directly or are coupled to, also intermediary element or layer may be there is.On the contrary, a certain element of title " directly existed " another element or layer " on ", when " directly connection " or " direct-coupling " are to another element or layer, then there is not intermediary element or layer.Numeral instruction like similar in institute's drawings attached.As used herein, term "and/or" comprises relevant listd one or more any and all combinations.
Here may use the space relative terms being convenient to describe, such as " ... under ", " below ", " bottom ", " more than ", " top " etc. describe the relation of an element or feature and another element or feature as illustrated in the drawing.Should be appreciated that space relative terms is intended to comprise the use outside orientation shown in figure or the device different orientation in work.Such as, if turned by the device in figure, the element being described as be in other elements or feature D score or " below " will towards " top " of other elements or feature.So, two kinds of orientations above and below exemplary term " below " can comprise.Device can be made to take other orientations (90-degree rotation or other orientations), and space relative terms used here makes respective explanations.
Embodiment one:
The present embodiment provides a kind of transformer being embedded with magnetic glue, refers to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and comprises: magnetic core 1 and the primary coil 2a, the secondary coil that are individually fixed on described magnetic core 1a; Magnetic glue 4a is provided with between described primary coil 2a and described secondary coil.
Described primary coil comprises: primary substrate, is coupled in the elementary coiling on described primary substrate; Described secondary coil comprises: secondary substrate, is coupled in the secondary rolling thread on described secondary substrate; Described primary substrate adopts PCB substrate, or three layer insulation wire line cake, or Copper Foil; Described secondary substrate adopts PCB substrate, or three layer insulation wire line cake, or Copper Foil.In the present embodiment, primary substrate adopts PCB substrate, and secondary substrate adopts PCB substrate.
In the accompanying drawing of the present embodiment, do not show secondary coil.Magnetic glue 4a is strip magnetic glue, is provided with two strip magnetic glue 4a, is arranged on primary coil 2 in a juxtaposed fashion;
Primary coil 2 comprises: elementary PCB substrate 21, is coupled in the elementary coiling 22 in described elementary PCB substrate 21.Magnetic core 1 adopts EE type magnetic core, and primary coil 2a is flat on magnetic core 1a, is provided with hole in the middle of the elementary PCB substrate 21 of primary coil 2a, for passing EE type magnetic core.
In the present embodiment, when assembling transformer, first by primary coil 2a horizontal on magnetic core 1a, then two strip magnetic glue 4a are arranged on primary coil 2a in a juxtaposed fashion, secondary coil 3a are being placed on the strip magnetic glue 4a that two modes arrange.Certainly, the centre of secondary coil 3a is also provided with for the hole through EE type magnetic core.During assembling, after primary coil 2a and secondary coil 3a is inserted magnetic core 1a, can also leave between primary coil 2 and secondary coil 3a and insert strip magnetic glue 4a space interval.
In the present embodiment, the length of strip magnetic glue 4a can set according to the size of the entirety of primary coil 2a, secondary coil 3a, transformer; In order to regulate the magnetic permeability of transformer, the thickness of the magnetic permeability of magnetic glue, magnetic glue, the area control of magnetic glue can be regulated.Like this, arrange magnetic glue 4a between the primary and secondary coil of transformer, resonant inductance can be integrated in transformer, the size of resonant inductance can by regulating magnetic permeability, the thickness of magnetic glue, the area control of magnetic glue of magnetic glue.This mode can make transformer reduce resonant inductance, reduces costs, equally compared with simple integrated resonant inductance mode, volume is little, magnetic coupling ability is strong, electromagnetic interference is little, transformer efficiency of transmission is high, easy to make, highly versatile.
In the present embodiment, magnetic glue constituent comprises: epoxy glue, manganese-zinc ferrite, nickel-zinc ferrite, ferrocart core, iron sial, iron silicon, iron nickel, iron nickel molybdenum.Magnetic glue characteristic determines primarily of magnetic glue initial permeability Ui, and magnetic glue initial permeability Ui is mixed into rubber and epoxy glue, manganese-zinc ferrite, nickel-zinc ferrite, ferrocart core, iron sial, iron silicon, iron nickel, iron nickel molybdenum according to the optimum configurations of transformer and mixes by different proportion and reach requirement.And magnetic glue is added between the primary and secondary coil of transformer, transformer operating frequency can be made to be up to 20MHz, and high-frequency loss is little, Curie temperature is high.
In the present embodiment, the performance cardinal principle changing transformer by increasing magnetic glue 4a is: when transformer does not pour into magnetic glue, in secondary short circuited situation, whole transformer is without magnetic flux, transformer leakage inductance very little (ideal value is zero).When transformer pours into magnetic glue, in the secondary situation of not short circuit, magnetic glue does not affect main flux magnetic circuit; In the secondary situation of short circuit, main flux still can have appropriate magnetic flux to pass through by magnetic glue formation loop guarantee is elementary, thus ensures that transformer leakage inductance reaches required value.
Embodiment two: refer to shown in Fig. 5:
The present embodiment and embodiment one difference are, in magnetic core 1b, strip magnetic glue 4b is one, and other structures are identical with embodiment one.
In the present embodiment, the particular location of strip magnetic glue 4b between primary coil 2b, secondary coil does not limit, and the area of the magnetic permeability of magnetic glue, the thickness of magnetic glue, magnetic glue can regulate according to the needs of transformer actual parameter.
Embodiment three: refer to shown in Fig. 6 and Fig. 7:
The present embodiment and embodiment one difference are, are all and arrange two strip magnetic glue 4c, and the arranged in parallel direction of two strip magnetic glue 4c is different, and other structures are identical with embodiment one.
In the present embodiment, the arranged in parallel direction of two strip magnetic glue 4c is mutually vertical with the arranged in parallel direction of two strip magnetic glue 4c in embodiment one.
Embodiment four: refer to shown in Fig. 8, Fig. 9 and Figure 10:
This enforcement and embodiment one difference are:
Secondary coil 3d described in primary coil 2d, described in the one and described magnetic glue 4d be clamped between described primary coil 2d and described secondary coil 3d forms a transformation assembly; On described magnetic core 1d, be provided with transformation assembly described at least one; When described magnetic core 1d is provided with multiple described transformation assembly, between described transformation assembly and described transformation assembly, be provided with described magnetic glue 4d.
Be understandable that, primary coil 2d, secondary coil 3d and the magnetic glue 4d between them are formed a transformation assembly, transformation assembly is placed in magnetic core 1d and forms transformer.Certainly can be provided with multiple transformation assembly in inside transformer, and be provided with magnetic glue 4d again between multiple transformation assembly.
Like this, not only increase further between primary and secondary coil and increase primary leakage inductance, also make to increase primary leakage inductance between transformation assembly, to reach resonant inductance requirement.And the large small transformers by regulating the magnetic permeability of magnetic glue, the thickness of magnetic glue, the area of magnetic glue to regulate leakage inductance.
In the present embodiment, the concrete shape of magnetic glue 4d can be strip magnetic glue or ring-type magnetic glue or polygon magnetic glue or irregular magnetic glue etc.
In the present embodiment, the mode that described magnetic glue 4d can adopt entirety to insert is positioned between described primary coil 2d and described secondary coil 4d, adopt the mode of gluey perfusion, or adopt the mode of powdery perfusion to be placed between described primary coil 2 and described secondary coil 4d.
Preferably, the space interval between described primary coil 2d and described secondary coil 3d is provided with airtight cavity, and described airtight cavity is provided with feed inlet and outlet, and described feed inlet and outlet is for adding or reduce the magnetic glue 4d in described airtight cavity.Magnetic glue 4d is powdery, can according to the powdery magnetic glue 4d of the parameter designing perfusion varying number of transformer, and then make transformer reach resonant inductance requirement.
Embodiment five: refer to shown in Figure 11, Figure 12 and Figure 13:
The present embodiment and above-described embodiment difference are, described magnetic core 1e is provided with two described primary coil 2e and described secondary coil 3e; Described secondary coil 3e is placed between two described primary coil 2e, and is respectively equipped with described magnetic glue 4e between described secondary coil 3e and two described primary coil 2e.
Be understandable that, this result is primary coil 2e-magnetic glue 4e-secondary coil 3e-magnetic glue 4e-primary coil 2e.
This mode can make transformer reduce resonant inductance, reduces costs, equally compared with simple integrated resonant inductance mode, volume is little, magnetic coupling ability is strong, electromagnetic interference is little, transformer efficiency of transmission is high, easy to make, highly versatile.
In the present embodiment, can be one group by this structure of primary coil 2e-magnetic glue 4e-secondary coil 3e-magnetic glue 4e-primary coil 2e, in magnetic core 1e, arrange multiple groups, and magnetic glue 4e is set between each group.
In the present embodiment, the version that primary coil 2e, magnetic glue 4e, secondary coil 3e are concrete does not limit here.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, identical similar portion reference mutually between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. be embedded with a transformer for magnetic glue, it is characterized in that, comprising: magnetic core and the primary coil, the secondary coil that are individually fixed on described magnetic core; Magnetic glue is provided with between described primary coil and described secondary coil.
2. the transformer being embedded with magnetic glue according to claim 1, is characterized in that:
Described primary coil comprises: primary substrate, is coupled in the elementary coiling on described primary substrate;
Described secondary coil comprises: secondary substrate, is coupled in the secondary rolling thread on described secondary substrate;
Described primary coil and described secondary coil are stacked and placed on described magnetic core, and are provided with space interval between described primary coil and described secondary coil;
Described magnetic glue is inserted in described space interval.
3. the transformer being embedded with magnetic glue according to claim 1 and 2, is characterized in that:
The shape of described magnetic glue is strip magnetic glue or ring-type magnetic glue, or polygon-shaped magnetic glue, or irregular magnetic glue.
4. the transformer being embedded with magnetic glue according to claim 3, is characterized in that:
Strip magnetic glue described at least one or described ring-type magnetic glue is provided with between described primary coil and described secondary coil, or described polygon-shaped magnetic glue, or described irregular magnetic glue.
5. the transformer being embedded with magnetic glue according to claim 1 and 2, is characterized in that:
Described magnetic core is provided with two described primary coils and a described secondary coil;
Described secondary coil is placed between two described primary coils, and is respectively equipped with described magnetic glue between described secondary coil and two described primary coils.
6. the transformer being embedded with magnetic glue according to claim 1 and 2, is characterized in that:
Secondary coil described in primary coil, described in one and the described magnetic glue be clamped between described primary coil and described secondary coil form a transformation assembly;
On described magnetic core, be provided with transformation assembly described at least one;
When described magnetic core is provided with multiple described transformation assembly, between described transformation assembly and described transformation assembly, be provided with described magnetic glue.
7. the transformer being embedded with magnetic glue according to claim 1 and 2, is characterized in that:
Described magnetic glue adopts the overall mode inserted to be positioned between described primary coil and described secondary coil, or adopts the mode of gluey perfusion to be placed between described primary coil and described secondary coil.
8. the transformer being embedded with magnetic glue according to claim 2, is characterized in that:
Space interval between described primary coil and described secondary coil is provided with airtight cavity, and described airtight cavity is provided with feed inlet and outlet, and described feed inlet and outlet is for adding or reduce the magnetic glue in described airtight cavity.
9. the transformer being embedded with magnetic glue according to claim 1 and 2, is characterized in that:
Described magnetic glue constituent comprises: epoxy glue, manganese-zinc ferrite, nickel-zinc ferrite, ferrocart core, iron sial, iron silicon, iron nickel, iron nickel molybdenum.
10. the transformer being embedded with magnetic glue according to claim 2, is characterized in that:
Described magnetic core adopts EE type magnetic core or EI type magnetic core or EC type magnetic core or PQ type magnetic core;
Described primary substrate adopts PCB substrate, or three layer insulation wire line cake, or Copper Foil;
Described secondary substrate adopts PCB substrate, or three layer insulation wire line cake, or Copper Foil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510177725.2A CN104752036A (en) | 2015-04-15 | 2015-04-15 | Transformer with embedded magnetic gum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510177725.2A CN104752036A (en) | 2015-04-15 | 2015-04-15 | Transformer with embedded magnetic gum |
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| Publication Number | Publication Date |
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| CN104752036A true CN104752036A (en) | 2015-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510177725.2A Pending CN104752036A (en) | 2015-04-15 | 2015-04-15 | Transformer with embedded magnetic gum |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114639530A (en) * | 2022-03-24 | 2022-06-17 | 广州市今凯电子有限公司 | Novel inductor and full-sealing glue production method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54137624A (en) * | 1978-04-18 | 1979-10-25 | Matsushita Electric Ind Co Ltd | Mold transformer |
| CN201112115Y (en) * | 2007-10-24 | 2008-09-10 | 达方电子股份有限公司 | Transformer |
| CN201134343Y (en) * | 2007-12-25 | 2008-10-15 | 全汉企业股份有限公司 | Transformer structure |
| CN201975208U (en) * | 2011-01-04 | 2011-09-14 | 程品电子科技(东莞)有限公司 | Transformer structure |
| CN103065778A (en) * | 2012-12-29 | 2013-04-24 | 深圳市澳磁电源科技有限公司 | Method for adjusting leakage inductance of high-frequency transformer and high-frequency transformer |
| CN204596597U (en) * | 2015-04-15 | 2015-08-26 | 东莞铭普光磁股份有限公司 | A kind of transformer being embedded with magnetic glue |
-
2015
- 2015-04-15 CN CN201510177725.2A patent/CN104752036A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54137624A (en) * | 1978-04-18 | 1979-10-25 | Matsushita Electric Ind Co Ltd | Mold transformer |
| CN201112115Y (en) * | 2007-10-24 | 2008-09-10 | 达方电子股份有限公司 | Transformer |
| CN201134343Y (en) * | 2007-12-25 | 2008-10-15 | 全汉企业股份有限公司 | Transformer structure |
| CN201975208U (en) * | 2011-01-04 | 2011-09-14 | 程品电子科技(东莞)有限公司 | Transformer structure |
| CN103065778A (en) * | 2012-12-29 | 2013-04-24 | 深圳市澳磁电源科技有限公司 | Method for adjusting leakage inductance of high-frequency transformer and high-frequency transformer |
| CN204596597U (en) * | 2015-04-15 | 2015-08-26 | 东莞铭普光磁股份有限公司 | A kind of transformer being embedded with magnetic glue |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114639530A (en) * | 2022-03-24 | 2022-06-17 | 广州市今凯电子有限公司 | Novel inductor and full-sealing glue production method thereof |
| CN114639530B (en) * | 2022-03-24 | 2022-10-11 | 广州市今凯电子有限公司 | Full-sealing adhesive production method of inductor |
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