CN201402721Y - Planar transformer - Google Patents
Planar transformer Download PDFInfo
- Publication number
- CN201402721Y CN201402721Y CN2009201491448U CN200920149144U CN201402721Y CN 201402721 Y CN201402721 Y CN 201402721Y CN 2009201491448 U CN2009201491448 U CN 2009201491448U CN 200920149144 U CN200920149144 U CN 200920149144U CN 201402721 Y CN201402721 Y CN 201402721Y
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- CN
- China
- Prior art keywords
- winding
- copper sheet
- flat surface
- insulant
- planar
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
A planar transformer relates to the technical field of transformers, in particular to a wrapping surface of a winding of the planar transformer, and is also applicable to a planar inductor. The planartransformer solves the problems of high cost and weak over-current capability of a plurality of layers of PCB windings, and inconsistent appearance and poor insulation effect of the winding which isformed by the wrapping of a copper sheet on an insulation film, in the existing planar transformer technology. The technical scheme adopted comprises a planar magnetic core and a winding which is installed in a planar magnetic core window; except the extraction pin of the winding, the winding is externally wrapped or filled with dense and continuous insulation materials. The planar transformer hasthe same neat appearance as the plurality layers of PCB windings, can also withstand high current, and can replace the plurality layers of PCB windings and the winding which is formed by the wrappingof the copper sheet on the insulation film, while the cost is reduced and the performance is improved.
Description
Technical field
The utility model relates to the transformer technology field, be specifically related to a kind of flat surface transformer winding seal the aspect, all authority requirement of this patent also is applicable to planar inductor.
Background technology
Under the miniaturization of electronic products development trend, it is little to have createed volume, the power density height, the better flat surface transformer of performance, flat surface transformer is generally formed with bonding being assembled together of magnetic core by the superimposed back of two or more windings, in existing technology, the copper sheet that the copper foil circuit that a lot of flat surface transformers adopt chemical etching on the multi-layer PCB boards forms as winding or with mechanical means is as winding.For the copper sheet mode, when making winding, can not directly contact between the copper sheet, enough distances must be arranged, perhaps coat and satisfy the dielectric film that dielectric strength requires on the copper sheet surface.Same, also need sufficient distance between winding copper sheet and the magnetic core or carry out electrical isolation at its surperficial coated insulation film.
For above conventional method, exist a lot of not enough.Mode for adopting multi-layer PCB board is that mainly the production cycle is long, and the Copper Foil sectional area is limited, and single Copper Foil can't be realized super-high-current, generally will use the multilayer copper foil parallel connection, so the cost height.Make the mode of winding for adopting copper sheet, mainly there is following shortcoming: the first, the insulation processing of copper sheet is complicated and time-consuming, and the effect of coated insulation film is undesirable, tightness is not high, the winding copper sheet is still all or part of to be exposed in air, therefore, and when the design plane transformer, must determine the parameter of its winding according to the air ambient condition, as the size of copper sheet, between copper sheet and the copper sheet, creepage distance between copper sheet and the magnetic core and air gap etc.The second, behind the copper sheet coated insulation film, the winding became uneven, the planar dimension disunity, there is not definite geometry, when packing winding into magnetic core, between winding and the winding, can't accurately locate between winding and the magnetic core, cause the flat surface transformer profile consistency of producing poor, the leading foot position of winding is inaccurate, and each pad is not or not a plane, flat surface transformer rosin joint occurs in use easily.
Summary of the invention
In sum, the purpose of this utility model is that multi-layer PCB winding cost height is a little less than the overcurrent capability in the existing flat surface transformer technology; And copper sheet is made winding, insulation processing complexity and effect is paid no attention to the problem of thinking of became uneven, and a kind of flat surface transformer that proposes.
For realizing the utility model purpose, the technical scheme of employing is: comprising: the winding in the planar magnetic core and the planar magnetic core window of packing into, except that the leading foot of winding, densification is sealed or be filled with to winding outward and continuous insulant.
As the technical solution of the utility model being made further improved technical scheme be: described insulant also is provided with insulation crust or insulating trip outward.
Described winding forms by copper sheet is stacked, except that pad, is provided with dielectric film or insulating cement as electrical isolation between the copper sheet.
Described insulant is an epoxy resin.
Described dielectric film is the polyimides pressure sensitive adhesive tape.
The external shape of insulant is a flat structure, and its upper surface is parallel with lower surface, and the side is vertical with upper and lower surface.
The beneficial effects of the utility model are: adopt copper sheet to make winding, the needs of the flat surface transformer of the big electric current of can satisfying the demand.Each winding is carried out after integral body seals, copper sheet is embedded in the insulant after the curing, do not contact with air, when the design winding, the size of copper sheet, between copper sheet and the copper sheet, creepage distance between copper sheet and the magnetic core and space length can determine according to the parameter of insulant, and the dielectric strength of insulant and puncture voltage are all much bigger than air, at least can a high order of magnitude, so between copper sheet and the copper sheet, the distance between copper sheet and the magnetic core can design forr a short time, this segment space of abdicating can be used for strengthening the width of copper sheet, reduces the copper loss of winding; Compared with prior art, after winding was sealed, copper sheet and air obtained isolating, and have avoided the environmental contaminants influence, have improved dielectric strength, have improved properties of product.Winding carries out unified profile being arranged after integral body seals, and each winding leading foot can accurately be located, and can produce the better flat surface transformer of the coplanarity that helps welding.
The flat surface transformer winding that adopts the utility model to produce, the same neat profile of multi-layer PCB winding is arranged, the ability of bearing big electric current is also arranged, can substitute multi-layer PCB winding and the film formed winding of copper sheet coated insulation in the prior art, and cost reduces, and performance improves.
Description of drawings
Fig. 1 is the cross-sectional view after the utility model is cut open from the magnetic core center pillar;
Fig. 2 is an A-A cross-sectional view among Fig. 1;
Fig. 3 is the structural representation before sealing of one of them winding of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment structure of the present utility model is described further:
Shown in Fig. 1, winding 1 of the present utility model and winding 2 be outer to be encapsulated with densification and the continuous epoxy resin or the insulant 3 of analog, winding 1 after sealing and winding 2 are packed in the window 41 of planar magnetic core 4, size integral body after winding is sealed is slightly less than the size of magnetic core window 41, to satisfy the requirement of rigging error and swelling stress, the external shape that is encapsulated with the insulant of winding 1 and winding 2 is a flat structure, and its upper surface is parallel with lower surface, and the side is vertical with upper and lower surface.
Shown in Fig. 2, winding 1 of the present utility model and winding 2 are kept apart mutually, and except that the leading foot 13,23 of winding, winding 1,2 is encapsulated in insulant 3 inside through solidifying fully, make winding 1,2 one-tenth as a whole.The leading foot 13,23 of winding 1,2 draws from insulant 3 that length is identical, and pad is in the same plane, is convenient to install welding.
1 puts into mould with winding, is poured into the liquid material of insulant, and curing and demolding forms.
2. winding is immersed in the liquid material of insulant, after the taking-up, baking and curing forms.
3. winding is put into an insulation box body, liquid insulant is filled with box body, baking and curing forms.
Shown in Fig. 3, winding of the present utility model is made up of one or more than one copper sheet 11, except that connection welding, between the face that needs to contact between the copper sheet 11, carry out electrical isolation with the dielectric film or the insulating cement 12 that can satisfy the dielectric strength requirement, if minim gap is still arranged between the copper sheet 11, when follow-up sealing, the liquid insulant of sealing usefulness can infiltrate and fill up.
For winding and external environment are isolated better, outside insulant, also be provided with insulation crust or insulating trip.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (6)
1, a kind of flat surface transformer comprises: the winding in the planar magnetic core and the planar magnetic core window of packing into, it is characterized in that: except that the leading foot of winding, densification is sealed or be filled with to winding outward and continuous insulant.
2, a kind of flat surface transformer according to claim 1 is characterized in that: described insulant also is provided with insulation crust or insulating trip outward.
3, a kind of flat surface transformer according to claim 1 is characterized in that: described winding forms by copper sheet is stacked, except that pad, is provided with dielectric film or insulating cement as electrical isolation between the copper sheet.
4, a kind of flat surface transformer according to claim 1 is characterized in that: described insulant is an epoxy resin.
5, a kind of flat surface transformer according to claim 3 is characterized in that: described dielectric film is the polyimides pressure sensitive adhesive tape.
6, a kind of flat surface transformer according to claim 1 is characterized in that: the external shape of insulant is a flat structure, and its upper surface is parallel with lower surface, and the side is vertical with upper and lower surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201491448U CN201402721Y (en) | 2009-04-28 | 2009-04-28 | Planar transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201491448U CN201402721Y (en) | 2009-04-28 | 2009-04-28 | Planar transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201402721Y true CN201402721Y (en) | 2010-02-10 |
Family
ID=41662521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201491448U Expired - Lifetime CN201402721Y (en) | 2009-04-28 | 2009-04-28 | Planar transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201402721Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103765533A (en) * | 2011-08-26 | 2014-04-30 | 罗姆股份有限公司 | Magnetic metal substrate and inductance element |
| CN111243814A (en) * | 2020-01-17 | 2020-06-05 | 深圳市铂科新材料股份有限公司 | Copper sheet embedded soft magnetic powder core inductor and preparation method and application thereof |
| CN111785507A (en) * | 2020-08-03 | 2020-10-16 | 湖南维胜科技电路板有限公司 | Planar transformer coil plate and manufacturing method thereof |
| CN111785507B (en) * | 2020-08-03 | 2024-05-10 | 湖南维胜科技电路板有限公司 | Planar transformer coil plate and manufacturing method thereof |
-
2009
- 2009-04-28 CN CN2009201491448U patent/CN201402721Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103765533A (en) * | 2011-08-26 | 2014-04-30 | 罗姆股份有限公司 | Magnetic metal substrate and inductance element |
| CN111243814A (en) * | 2020-01-17 | 2020-06-05 | 深圳市铂科新材料股份有限公司 | Copper sheet embedded soft magnetic powder core inductor and preparation method and application thereof |
| CN111785507A (en) * | 2020-08-03 | 2020-10-16 | 湖南维胜科技电路板有限公司 | Planar transformer coil plate and manufacturing method thereof |
| CN111785507B (en) * | 2020-08-03 | 2024-05-10 | 湖南维胜科技电路板有限公司 | Planar transformer coil plate and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA ZHENHUA (GROUP) XINYUN ELECTRONIC COMP. + DE Free format text: FORMER OWNER: TIAN XIANPING Effective date: 20120118 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 400030 SHAPINGBA, CHONGQING TO: 550018 GUIYANG, GUIZHOU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120118 Address after: 550018 Guizhou province Guiyang city Wudang District North New Road No. 232 Patentee after: China Zhenhua (Group) Xinyun Electronic Component Co., Ltd. Address before: 400030 Chongqing city Shapingba District tianxingqiao sun light flat 69 12-11-3 Patentee before: Tian Xianping |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100210 |
|
| CX01 | Expiry of patent term |