CN205789421U - The flat surface transformer of twin columns core structure - Google Patents
The flat surface transformer of twin columns core structure Download PDFInfo
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- CN205789421U CN205789421U CN201620473391.3U CN201620473391U CN205789421U CN 205789421 U CN205789421 U CN 205789421U CN 201620473391 U CN201620473391 U CN 201620473391U CN 205789421 U CN205789421 U CN 205789421U
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Abstract
The utility model discloses the flat surface transformer of a kind of twin columns core structure, including ferrite flat-plate transformer magnetic core and the multilayer planar winding coil of " π I " structure；This utility model had both reduced the integral thickness of magnetic core and in turn ensure that the equilibrium of whole magnetic circuit magnetic flux density, meanwhile, effectively solved the shielding of planar coil leakage field；Magnetic air gap can be arranged on outside all planar coil windings by it, avoids and is in gas gap plane winding and is caused by airgap effect and affected；This utility model makes flat-plate transformer no longer because being limited by coil turn, and pursues the raising of operating frequency simply, thus causes power-efficient reduction, electromagnetic compatibility to be difficult to many technical bottlenecks such as up to standard.
Description
Technical field
This utility model relates to a kind of flat surface transformer, the flat surface transformer of a kind of twin columns core structure.
Background technology
Traditional high frequency transformer is generally made up of high frequency magnetic core and electromagnetic wire winding, especially with ferrum oxygen
Body high frequency magnetic core assembles: have the transformator of skeleton enamel insulated round copper wire winding, it has also become current a kind of main
Flow structure.For FERRITE CORE, the most define the series of tens kinds of different structure type.So
And, conventional highfrequency transformator is exactly the huge monster in supply convertor always；Meanwhile, it causes again
The main occurring source of high frequency electromagnetic radiation interference.The volume how reducing transformator realizes high frequency electric source conversion
The emphasis research topic of the power density of device, always industry.From electromagnetic basic theories it is known that
The operating frequency improving changer is i.e. greatly improved the power that same transformator can transmit.Undoubtedly, this
It it is the inevitable direction of high frequency electric source changer Future Development.At the same time it is also necessary to be clear that changer is
One system, parts in transformator only whole system, at all parts of whole system all
Not yet solving high frequency applicable technology now, pursue the high frequency of changer simply, its result is: become
Many consequences such as the reduction of parallel operation efficiency, numerous and diverse, with high costs, the electromagnetic pollution aggravation of circuit structure.This
Situation is more prominent along with the increase of inverter power.In order to reduce the size of high frequency transformer, in recent years between
Transformer industry all pay close attention to a kind of new construction flat surface transformer, it by traditional transformer winding from skeleton
Arrange that the method for coiling winding is changed into from inside to outside and make sheet-like plane winding in advance, match different
Plane winding lamination assembling transformator；Plate surface winding is then: use existing print circuit plates making skill
Art, it is achieved transformator plane the winding even new technology of line bag assembly.Flat surface transformer and traditional transformer
Compare and have that coupling performance between winding is good, efficiency is high, leakage field is little.Meanwhile, also it is that to realize transformator slim
Change, the innovation structure of high frequency.In recent years, between, the high frequency transformer of this planar structure is in medium and small merit
Rate DC/DC plate card type power supply obtains using widely, the plate surface transformator made with printed panel
A mature technology of industrial applications has been become in, in small-power DC/DC changer.Make a general survey of existing
The modern power supply company that technology is top in the world, the AC/DC board power supply of up-to-date release always cannot realize
Module thickness under DC/DC board power supply identical power conditions, it is slim that first cause is exactly AC/DC transformator
The difficulty changed；Even most widely used and fall over each other spell ratio miniaturization structure charger for mobile phone, also have no employing
Flat-plate transformer.This strange phenomenon is the most inconceivable In the view of layman.In fact, almost
In all of, small-power AC/DC power supply, especially by The Flyback Converter the most universal, most widely used
Also the flat-plate transformer that serviceability is superior is had no chance.In fact, Power Management Design teacher both knows about the change of existing plane
Depressor structure is not appropriate for more umber of turn and works in the AC/DC conversion of relatively low switching frequency requirement
Device, the especially changer of single-ended reverse exciting topology.This is not only also asking of Transformer Winding difficult design
Topic, also results in than tradition around the more defect of line transformer.In order to enable flat surface transformer to be applicable to
Its peculiar technical performance, just the technology is remained under conditions of the topology of various supply convertors
The power of research and development and target.The utility model of the FERRITE CORE series of " π I " structure is above-mentioned target
Realization is proposed a kind of basic components.Additionally printed circuit board machining process and the limitation of copper clad layers thickness,
Umber of turn and water conservancy diversion cross section that monolayer Copper Foil is formed are the most extremely limited, are suitable only for some small-powers low
The utilization condition of pressure DC/DC changer.For requiring that umber of turn is more (such as: have high voltage input
AC/DC) or require the application occasion of larger current density, can only by the string of the circuit board of multilamellar and
Reaching the requirement of the number of turn and electric current density, so flat surface transformer is accomplished by using quite a lot of number of plies
Circuit board build up, the structure feature making flat-plate transformer little, thin is all gone.
Summary of the invention
This utility model is for the deficiencies in the prior art, it is proposed that the flat-faced tube of a kind of twin columns core structure becomes
Depressor.
The flat-faced tube transformator of this utility model a kind of twin columns core structure, including the ferrum of " π I " structure
Oxysome flat-plate transformer magnetic core and multilayer planar winding coil；
The ferrite flat-plate transformer magnetic core of " π I " structure includes magnetic core and lower magnetic core；Described upper magnetic
Core includes that a flat board and two magnetic posts, two described magnetic posts are arranged on flat board, the cross section of two magnetic posts
Equal, shape is identical, arranged in parallel；Described lower magnetic core is a rectangular flat；Upper magnetic core and lower magnetic core
Between gluing.
The described distance between two magnetic posts is more than or equal to the top on the top of twice magnetic post and the flat board of magnetic core
The distance of end；Wherein magnetic core is arrived to the distance on the top of the flat board of magnetic core and the bottom of magnetic post in the top of magnetic post
The distance of the bottom of flat board is identical, and the distance of the side of the side of magnetic post and the flat board of magnetic core is equal to the top of magnetic post
The distance on the top of the flat board of end and magnetic core；The flat board of magnetic core is more than or equal to single magnetic post in two magnetic intercolumniation cross sections
The cross section of the flat board being parallel to magnetic core.
Described plane winding coil is: the initial and end end of pcb board series connection winding is all from the outside of pcb board
Draw along the plated through-hole pad arranged；Have two magnetic core posts arranged in parallel on pcb board and through hole is installed；
With double-sided copper-clad base material cabling, and form four windings around two core pole holes；Each core pole hole edge leads to
Cross copper face cabling via, make around same stem stem cover copper cabling formed around to identical " double-deck series connection around
Group "；Make two around different stem stems " double-deck series connection windings " by around connecting to carrying out on the contrary
Constitute twin columns, the imposite winding of four windings in series, obtain monolayer plane winding coil, then the monolayer that will obtain
Plane winding coil concatenates；Obtain being applicable to the multilayer planar winding coil of twin columns core structure；At adjacent list
Between layer plane winding coil, insulating barrier is set；The last multilayer planar winding coil at twin columns core structure
Top layer and bottom arrange insulating barrier.
Described multilayer planar winding coil is arranged between magnetic core and lower magnetic core, and two magnetic posts are arranged on many
The magnetic core post of layer plane winding coil is installed in through hole.
Described each core pole hole edge passes through multiple copper face cabling vias.
The rectangular flat of described upper magnetic core is identical with lower core structure and size；
Up and down after magnetic core gluing, the plane of magnetic core is parallel up and down, upper and lower core plane cover all planar coils around
Group.
The material of described upper magnetic core and lower magnetic core is ferrite.
Air gap bed course is added between one or two magnetic post of described upper magnetic core and lower magnetic core flat board.
Beneficial effect:
1, this utility model had both reduced the integral thickness of magnetic core and in turn ensure that the equal of whole magnetic circuit magnetic flux density
Weighing apparatus, meanwhile, effectively solves the shielding of planar coil leakage field；
2, magnetic air gap can be arranged on outside all planar coil windings by it, avoids and is in gas gap plane
Winding is caused by airgap effect to be affected；
3, the flat-plate transformer being made up of this structural series magnetic, is common to various power conversions now
Type with topology, be especially suitable for make isolated form AC/DC, single-ended, both-end, normal shock, flyback be suitable for
Type power supply；
4, it is particularly suitable for the printed circuit board (PCB) ultrathin plate card type power supply as planar coil, is
Flat-plate transformer makes a key technology of plate card type AC/DC power supply now；
5, meet electromagnetic theory and correlation computations formula with the flat-plate transformer of its design, make flat
Transformator is no longer because being limited by coil turn, and pursues the raising of operating frequency simply, thus causes power supply to be imitated
Rate reduces, electromagnetic compatibility is difficult to many technical bottlenecks such as up to standard；
6, there is substantially identical setting with the flat-plate transformer of its design with conventional Wound-rotor type transformator
Meter and computational methods, have good replaceability, and it breaches many technology systems of flat-plate transformer structure
About, it is achieved that the replacement to general Wound-rotor type transformer frequency response of the plate card type power supply；
7, by standardized structural that printed circuit Winding Design is " two-sided winding soleplate " series.According to each
Plant the transformer parameter required by electric source topology and match corresponding magnetic core and soleplate, by string winding flaggy
Obtain required umber of turn and winding current, combo can become the various dissimilar and transformator of specification.
Change the limitation that traditional circuit-board winding can only be special；Meanwhile, greatly reduce what printed circuit winding made
Technical difficulty and higher processing cost.The flexible craft making normalized base plate combo transformator becomes existing
Real；
8, this utility model greatly reduces the gross thickness of board-like transformator, is to realize plate surface transformator
The key technology of slim words；
Accompanying drawing explanation
Fig. 1 is the upward view of upper magnetic core；
Fig. 2 is upper magnetic core front view；
Fig. 3 is the structural representation of lower magnetic core；
Fig. 4 is the upper bottom surface structural representation of plane winding coil；
Fig. 5 is the bottom surface structural representation of plane winding coil；
Fig. 6 is the structural representation of multilayer planar winding coil.
Detailed description of the invention
As shown in Figure 1 and Figure 2, the flat surface transformer of a kind of twin columns core structure, including " π I " structure
Ferrite flat-plate transformer magnetic core and multilayer planar winding coil；
The ferrite flat-plate transformer magnetic core of " π I " structure includes magnetic core and lower magnetic core；Described upper magnetic
Core includes that a flat board 1 and two magnetic posts 2, two described magnetic posts are arranged on flat board, two magnetic posts
Cross section is equal, and shape is identical, arranged in parallel；Described lower magnetic core is a rectangular flat；Upper magnetic core and under
Gluing between magnetic core.
The described distance between two magnetic posts is more than or equal to the top on the top of twice magnetic post and the flat board of magnetic core
The distance of end；Wherein magnetic core is arrived to the distance on the top of the flat board of magnetic core and the bottom of magnetic post in the top of magnetic post
The distance of the bottom of flat board is identical, and the distance of the side of the side of magnetic post and the flat board of magnetic core is equal to the top of magnetic post
The distance on the top of the flat board of end and magnetic core；The flat board of magnetic core is more than or equal to single magnetic post in two magnetic intercolumniation cross sections
The cross section of the flat board being parallel to magnetic core.
As it is shown on figure 3, described lower magnetic core 3 is a flat board；The flat board of upper magnetic core and lower core structure
Identical with size；Gluing between upper magnetic core and lower magnetic core, the gluing method phase of method and traditional transformer magnetic core
With.
The material of described upper magnetic core and lower magnetic core is ferrite.The parameter of core material and traditional transformer magnetic
Core material calculation method of parameters is consistent.
The interpolation of magnetic core air gap, method is to add between one or two magnetic post and lower magnetic core flat board of upper magnetic core
Enter air gap bed course.
After magnetic core gluing, the plane of upper and lower magnetic core is parallel, and upper and lower core plane covers all planar coil windings.
As shown in Fig. 4, Fig. 5, Fig. 6, described multilayer planar winding coil is: pcb board series connection around
Plated through-hole 4 pad that the initial and end end of group is all arranged from the outer edge of pcb board is drawn；Open on pcb board
There are two magnetic core posts arranged in parallel that through hole 5 is installed；And double-sided copper-clad base material cabling 6, and formed around
Four windings of two core pole holes；Each core pole hole edge pass through multiple copper face cabling vias 9, make around
The copper cabling 3 that covers of same stem stem is formed around to identical " double-deck series connection winding "；Make around different stem stems
Two " double-deck series connection windings " by around i.e. may make up twin columns, four windings in series to carrying out on the contrary connecting
Imposite winding, obtains monolayer plane winding coil, then is concatenated by the monolayer plane winding coil 8 obtained；?
To the multilayer planar winding coil being applicable to twin columns core structure；Set between adjacent monolayer plane winding coil
Put insulating barrier；Top layer and the bottom of the last multilayer planar winding coil at twin columns core structure arrange insulating barrier
7。
Described plane winding coil is arranged between magnetic core and lower magnetic core, two magnetic posts be arranged on plane around
The magnetic core post of group coil is installed in through hole.
Claims (9)
1. the flat surface transformer of twin columns core structure, including the ferrite flat-plate transformer of " π I " structure
Magnetic core and multilayer planar winding coil；
It is characterized in that: the ferrite flat-plate transformer magnetic core of " π I " structure includes magnetic core and lower magnetic core；
Described upper magnetic core includes that a flat board and two magnetic posts, two described magnetic posts are arranged on flat board, two
The cross section of root magnetic post is equal, and shape is identical, arranged in parallel；Described lower magnetic core is a rectangular flat；
Gluing between upper magnetic core and lower magnetic core, wherein the top of magnetic post is to the distance on the top of the flat board of magnetic core and magnetic
The bottom of post is identical to the distance of the bottom of the flat board of magnetic core；
Described plane winding coil is: the initial and end end of pcb board series connection winding is all from the outside of pcb board
Draw along the plated through-hole pad arranged；Have two magnetic core posts arranged in parallel on pcb board and install logical
Hole；With double-sided copper-clad base material cabling, and form four windings around two core pole holes；Each core pole hole
Edge passes through copper face cabling via, makes the copper cabling that covers around same stem stem be formed around to identical " double
Layer series connection winding "；Two around different stem stems " double-deck series connection windings " are made to carry out by around on the contrary
Series connection i.e. may make up the imposite winding of twin columns, four windings in series, obtains monolayer plane winding coil, then will
The monolayer plane winding coil concatenation obtained；Obtain being applicable to the multilayer planar winding wire of twin columns core structure
Circle；Between adjacent monolayer plane winding coil, insulating barrier is set；Finally in the multilamellar of twin columns core structure
Top layer and the bottom of plane winding coil arrange insulating barrier；
Described multilayer planar winding coil is arranged between magnetic core and lower magnetic core, and two magnetic posts are arranged on
The magnetic core post of multilayer planar winding coil is installed in through hole.
The flat surface transformer of twin columns core structure the most according to claim 1, it is characterised in that: institute
Distance between the two magnetic posts stated more than or equal to the flat board of top and the magnetic core of twice magnetic post top away from
From.
The flat surface transformer of twin columns core structure the most according to claim 1, it is characterised in that: magnetic
The side of post is equal to the top with the flat board of magnetic core, the top of magnetic post with the distance of the side of the flat board of magnetic core
Distance.
The flat surface transformer of twin columns core structure the most according to claim 1, it is characterised in that: magnetic
The flat board of core is more than or equal to the cross section of the flat board being parallel to magnetic core of single magnetic post at two magnetic intercolumniation areas of section
Area.
The flat surface transformer of twin columns core structure the most according to claim 1, it is characterised in that: institute
The each core pole hole edge stated passes through multiple copper face cabling vias.
The flat surface transformer of twin columns core structure the most according to claim 1, it is characterised in that: institute
The rectangular flat of the upper magnetic core stated is identical with lower core structure and size.
The flat surface transformer of twin columns core structure the most according to claim 1, it is characterised in that on:
After lower magnetic core gluing, the plane of upper and lower magnetic core is parallel, and upper and lower core plane covers all planar coil windings.
The flat surface transformer of twin columns core structure the most according to claim 1, it is characterised in that: institute
The upper magnetic core stated and the material of lower magnetic core are ferrite.
The flat surface transformer of twin columns core structure the most according to claim 1, it is characterised in that:
Air gap bed course is added between one or two magnetic post of described upper magnetic core and lower magnetic core flat board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620473391.3U CN205789421U (en) | 2016-05-20 | 2016-05-20 | The flat surface transformer of twin columns core structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620473391.3U CN205789421U (en) | 2016-05-20 | 2016-05-20 | The flat surface transformer of twin columns core structure |
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| Publication Number | Publication Date |
|---|---|
| CN205789421U true CN205789421U (en) | 2016-12-07 |
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ID=58115813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620473391.3U Active CN205789421U (en) | 2016-05-20 | 2016-05-20 | The flat surface transformer of twin columns core structure |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105869855A (en) * | 2016-05-20 | 2016-08-17 | 浙江求缺科技有限公司 | Planar transformer with double-column magnetic core structure |
| CN113593841A (en) * | 2021-09-28 | 2021-11-02 | 广东力王高新科技股份有限公司 | High-power planar transformer and electronic equipment |
| CN115662754A (en) * | 2022-12-06 | 2023-01-31 | 眉山博雅新材料股份有限公司 | High-frequency power supply and transformer applied to same |
-
2016
- 2016-05-20 CN CN201620473391.3U patent/CN205789421U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105869855A (en) * | 2016-05-20 | 2016-08-17 | 浙江求缺科技有限公司 | Planar transformer with double-column magnetic core structure |
| CN113593841A (en) * | 2021-09-28 | 2021-11-02 | 广东力王高新科技股份有限公司 | High-power planar transformer and electronic equipment |
| CN113593841B (en) * | 2021-09-28 | 2021-12-07 | 广东力王高新科技股份有限公司 | High-power planar transformer and electronic equipment |
| CN115662754A (en) * | 2022-12-06 | 2023-01-31 | 眉山博雅新材料股份有限公司 | High-frequency power supply and transformer applied to same |
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