CN106971829A - Flat surface transformer - Google Patents
Flat surface transformer Download PDFInfo
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- CN106971829A CN106971829A CN201710297210.5A CN201710297210A CN106971829A CN 106971829 A CN106971829 A CN 106971829A CN 201710297210 A CN201710297210 A CN 201710297210A CN 106971829 A CN106971829 A CN 106971829A
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- magnetic pole
- primary side
- window
- conductive coil
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
- H01F2027/2819—Planar transformers with printed windings, e.g. surrounded by two cores and to be mounted on printed circuit
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Or Transformers For Communication (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
This application provides a kind of flat surface transformer, the flat surface transformer has higher window utilization rate.The flat surface transformer includes：For the first primary side PCB (210) and the second primary side PCB (220) of the primary side winding for forming the flat surface transformer；The first primary side PCB (210) includes the first conductive coil (211), surround the part of first magnetic pole window (212) coiling at least two magnetic pole windows in first conductive coil (211) with surrounding the part of second magnetic pole window (213) coiling at least two magnetic poles window in first conductive coil by identical layer-exchange hole-through (201) with the second primary side PCB (220) to be connected, the first magnetic pole window (212) and the second magnetic pole window (213) are any two magnetic pole window at least two magnetic poles window (212).
Description
Technical field
The application is related to circuit field, and more particularly, to a kind of flat surface transformer.
Background technology
Transformer is that one kind utilizes mutual electromagnetic inductance, realizes the device of voltage of transformation, electric current and impedance.Transformer is by magnetic pole
With winding composition, winding is divided into primary side winding and vice-side winding.Flat surface transformer difference maximum compared with traditional transformer
Difference including winding.Under normal circumstances, the winding of flat surface transformer is covered with the print of conductive foil (being usually copper foil) using multilayer
Printed circuit board (Printedcircuitboard, PCB) is stacked and formed.The appearance of flat surface transformer, substantially reduces transformer
Volume and height, enable power module to minimize, planarize.The magnetic pole window utilization rate of flat surface transformer is that influence plane becomes
The key factor of depressor performance, the magnetic pole window utilization rate for how improving flat surface transformer is technical problem urgently to be resolved hurrily.
The content of the invention
The application provides a kind of flat surface transformer, compared to the flat surface transformer of prior art, the plane transformation of the application
Utensil has higher window utilization rate.
First aspect includes there is provided a kind of flat surface transformer, the flat surface transformer：For forming the flat surface transformer
Primary side winding multilayer primary side printing board PCB, the multilayer primary side PCB include the first primary side PCB and the second primary side
PCB；The first primary side PCB includes the multiple magnetic pole windows and the first conductive coil for being used to assemble magnetic pole, and described first is conductive
Coil surrounds at least two magnetic pole window coilings in the multiple magnetic pole window；In first conductive coil described in extremely
The part of the first magnetic pole window coiling is with surrounding at least two magnetic in few two magnetic pole windows in first conductive coil
The part of the second magnetic pole window coiling passes through the second primary side PCB in identical layer-exchange hole-through and the multi-layer PCB in post window
It is connected, the first magnetic pole window and the second magnetic pole window are any two magnetic pole window at least two magnetic poles window
Mouthful.
In the prior art, for individual layer primary side PCB, conductive coil and magnetic pole window are corresponded, conductive coil
Around corresponding magnetic pole window coiling.Each magnetic pole window in multiple magnetic pole windows that i-th (i >=1) layer primary side PCB includes
The conductive coil of mouth periphery is connected by different layer-exchange hole-throughs and kth (k >=1, and k ≠ i) layer primary side PCB.That is, every
The conductive coil of individual magnetic pole window periphery is independent, it is assumed that every layer of primary side PCB is included outside Z magnetic pole window, Z magnetic pole window
Z layer-exchange hole-through group of conductive coil correspondence (quantity for the layer-exchange hole-through that each layer-exchange hole-through group includes and the magnetic pole coiling enclosed
The number of turn of primary side winding is related).And in the embodiment of the present application, the first conductive coil that the first primary side PCB includes is around at least
Two magnetic pole window coilings, the first conductive coil is (common using identical layer-exchange hole-through around the part of different magnetic pole window coilings
Enjoy layer-exchange hole-through), the quantity of layer-exchange hole-through can be reduced by shared layer-exchange hole-through, magnetic pole window utilization rate is improved.
In a kind of possible implementation, around the part of the first magnetic pole window coiling with around the second magnetic pole window around
The part of system is connected, and electric current encloses in the magnetic direction that the part for surrounding the first magnetic pole window coiling is produced with electric current described
The magnetic direction produced around the part of the second magnetic pole window coiling is different.
In a kind of possible implementation, the first primary side PCB includes at least one conductive coil, the conductor wire
At least two magnetic pole windows in the multiple magnetic pole window of circle correspondence, the conductive coil surrounds corresponding at least two magnetic pole
Window coiling, the corresponding magnetic pole window of different conductive coils is non-overlapping, and at least one is conductive to be described for first conductive coil
Any of coil conductive coil.
In the embodiment of the present application, the number for the conductive coil that the first primary side PCB includes can according to the actual requirements, be designed
Amount, the flat surface transformer has higher compatibility and applicability.
In a kind of possible implementation, the quantity of the corresponding magnetic pole window of described at least one conductive coil with it is described
The quantity of the corresponding magnetic poles of first primary side PCB is identical.
For the ease of understanding this programme, the concept of magnetic pole group of windows can be introduced.I.e., it is assumed that the first primary side PCB includes many
The plurality of magnetic pole window, can be divided into M magnetic pole group of windows by individual magnetic pole window, and each magnetic pole group of windows includes at least two
Four magnetic pole windows (for example, it is assumed that the first primary side PCB includes four magnetic pole windows, can be divided into two by magnetic pole window
Magnetic pole group of windows, each magnetic pole window includes two magnetic pole openings).Correspondingly, first primary side PCB includes M conductive coil,
The M conductive coil is corresponded with M magnetic pole group of windows, and each conductive coil surrounds corresponding magnetic pole in M conductive coil
Group of windows coiling.Each conductive coil has the characteristic that layer-exchange hole-through is shared, and it is less that the program can have primary side PCB
Layer-exchange hole-through, to improve the magnetic pole window utilization rate of flat surface transformer.
The program is conducive to further reducing the quantity for the layer-exchange hole-through that primary side PCB includes, so that the plane of the application
Transformer has higher magnetic pole window utilization rate.
In a kind of possible implementation, if the quantity for the conductive coil that at least one described conductive coil includes is more than
The quantity n for the layer-exchange hole-through for forming primary side winding that 1, the first primary side PCB include meets below equation：N=(N-
1)·M+3；Wherein, N is the number of turn of the primary side winding of the single magnetic pole coiling, and M is that at least one described conductive coil includes
Conductive coil quantity, N >=1, M >=2.
In a kind of possible implementation, if the quantity for the conductive coil that at least one described conductive coil includes is equal to
The quantity n for the layer-exchange hole-through for forming primary side winding that 1, the first primary side PCB include meets below equation：N=2N+1；
Wherein, N is the number of turn of the primary side winding of the single magnetic pole coiling, N >=1.
In a kind of possible implementation, the quantity for the conductive coil that at least one described conductive coil includes is M, institute
The quantity for stating the magnetic pole window that at least two magnetic pole windows include is K, wherein, M >=2, K >=2.
In a kind of possible implementation, the quantity of at least two magnetic poles window and PCB pairs of first primary side
The quantity for the magnetic pole answered is identical, and the quantity of at least two magnetic poles window is more than or equal to 4.
In a kind of possible implementation, at least two magnetic poles window constitutes the array of 2 row multiple rows；Described first
Conductive coil surrounds each row of at least two magnetic poles window according to figure of eight coiling.
Second aspect includes first aspect or any possibility of first aspect there is provided a kind of active circuit, the active circuit
The flat surface transformer of implementation.
The flat surface transformer that the application is provided, the first primary side PCB includes the first conductive coil, and first conductive coil is surrounded
The partial sharing layer-exchange hole-through of different magnetic pole window coilings is surrounded at least two magnetic pole window coilings, first conductive coil,
So that primary side PCB has less layer-exchange hole-through, so that flat surface transformer has higher window utilization rate.
Brief description of the drawings
Fig. 1 is the primary side PCB of flat surface transformer and the schematic broken away view of one of magnetic pole.
The schematic light of one that Fig. 2 is two layers of primary side PCB in existing flat surface transformer is drawn.
Fig. 3 is drawn according to the primary side PCB mono- of the flat surface transformer of the embodiment of the present application schematic light.
Fig. 4 is drawn according to another of the primary side PCB of the flat surface transformer of the embodiment of the present application schematic light.
The schematic light of one that Fig. 5 is the secondary PCB according to the flat surface transformer of the embodiment of the present application is drawn.
Fig. 6 is that the schematic light of the another example of the primary side PCB according to the flat surface transformer of the embodiment of the present application is drawn.
The schematic light of another that Fig. 7 is the secondary PCB according to the flat surface transformer of the embodiment of the present application is drawn.
Embodiment
Below in conjunction with accompanying drawing, the technical scheme in the application is described.
Flat surface transformer includes the PCB and magnetic pole that multilayer lays the conductive foils such as copper foil.Every layer of PCB includes identical quantity
Magnetic pole window for assembling magnetic pole.In the multi-layer PCB that flat surface transformer includes, a part of PCB is used to form primary side PCB,
A part of PCB is used to form vice-side winding.For convenience of description, it is generally the case that will be designated as the PCB for forming primary side winding
Primary side PCB, will be designated as secondary PCB for forming the PCB of vice-side winding.
Fig. 1 is the primary side PCB of flat surface transformer and the schematic broken away view of one of magnetic pole.As shown in figure 1, the plane becomes
Depressor includes five layers of primary side PCB110.Every layer of primary side PCB110 include four be used to assembling the magnetic pole window 111 of magnetic pole with
And with the one-to-one multiple conductive coils 112 of multiple magnetic pole windows 111, each conductive coil 112 surrounds corresponding single magnetic
The coiling of post window 111.Pass through layer-exchange hole-through phase between different layer primary side PCB110 conductive coil in multilayer primary side PCB110
Even.
In the prior art, the conductive coil of each magnetic pole window periphery changes layer by different in same layer primary side PCB
Via is connected with another layer of primary side PCB.
Still by taking Fig. 1 as an example, the schematic light of one that Fig. 2 is two layers of primary side PCB in existing flat surface transformer is drawn.Should
Multilayer primary side PCB110 includes the first primary side PCB110a and the second primary side PCB110b (it should be understood that the first primary side PCB110a and the
Two primary side PCB110b are the primary side PCB of different layers).
First primary side PCB110a includes four magnetic pole windows and four conductive coils, the second primary side PCB110b bags
The conductive coil for including four magnetic pole window peripheries in four magnetic pole windows and four conductive coils, the first primary side PCB passes through not
Same layer-exchange hole-through is connected with the second primary side PCB110b.
For example, the first primary side PCB110a includes magnetic pole window 111a1And magnetic pole window 111a2, the second primary side PCB includes
Magnetic pole window 111b1And magnetic pole window 111b2.Magnetic pole window 111a1The conductive coil 112a of periphery1With magnetic pole window 111b1
The conductive coil 112b of periphery1It is connected by layer-exchange hole-through 101, magnetic pole window 111a2The conductive coil 112a of periphery2With magnetic pole
Window 111b2The conductive coil 112b of periphery2It is connected by layer-exchange hole-through 102.By that analogy, the first primary side PCB110a includes four
The conductive coil of each magnetic pole window periphery passes through different layer-exchange hole-throughs and second in individual magnetic pole window, four magnetic pole windows
Primary side PCB110b conductive coil is connected.
That is, in the prior art, if every layer of PCB includes Z magnetic pole window, Z of the Z magnetic pole window periphery
Conductive coil correspondence Z layer-exchange hole-through group (quantity for the layer-exchange hole-through that each layer-exchange hole-through group includes and the primary side of magnetic pole coiling
The number of turn of winding is related).
The quantity for the layer-exchange hole-through that PCB includes and the magnetic pole window utilization rate of flat surface transformer are negatively correlated, i.e. PCB includes
Layer-exchange hole-through quantity it is fewer, the magnetic pole window of flat surface transformer is using higher, and therefore, the embodiment of the present application proposes a kind of flat
Face transformer, the flat surface transformer has less layer-exchange hole-through, so that the flat surface transformer has higher magnetic pole window profit
With rate.
Fig. 3 is drawn according to the primary side PCB mono- of the flat surface transformer of the embodiment of the present application schematic light.Such as Fig. 3 institutes
Show, the flat surface transformer includes：
For the multilayer primary side printing board PCB for the primary side winding for forming the flat surface transformer, the multilayer primary side
PCB includes the first primary side PCB210 and the second primary side PCB220；
The first primary side PCB210 includes the multiple magnetic pole windows and the first conductive coil 211 for being used to assemble magnetic pole, institute
State at least two magnetic pole window coilings of first conductive coil 211 in the multiple magnetic pole window；
The coiling of the first magnetic pole window 212 at least two magnetic poles window is surrounded in first conductive coil 211
Part leads to surrounding the part of the coiling of the second magnetic pole window 213 at least two magnetic poles window in first conductive coil
Cross identical layer-exchange hole-through 201 with the second primary side PCB220 in the multi-layer PCB to be connected, the He of the first magnetic pole window 212
The second magnetic pole window 213 is any two magnetic pole window at least two magnetic poles window 212.
It should be understood that the first primary side PCB210 and the second primary side PCB220 of the embodiment of the present application are two layers different of primary sides
PCB。
Specifically, the first conductor wire 211 circle is surrounded in multiple magnetic pole window coilings, and the first conductive coil 211 around not
Part with magnetic pole window coiling is connected using identical (one or two) layer-exchange hole-through with the second primary side PCB220, Neng Goushi
Now layer-exchange hole-through is shared.
As shown in figure 3, the magnetic pole window that first conductive coil 211 is surrounded includes the first magnetic pole window 212 and the second magnetic
Post window 213.Part in first conductive coil 211 around the coiling of the first magnetic pole window 212 in the first conductive coil 211 with enclosing
It is connected around the part of the coiling of the second magnetic pole window 213 by identical layer-exchange hole-through 201 with the second primary side PCB220.
For convenience of description, can be by " part that the coiling of the first magnetic pole window 212 is surrounded in the first conductive coil 211 " note
For " Part I ", " part that the coiling of the second magnetic pole window 213 is surrounded in the first conductive coil 211 " is designated as " second
Point ", the Part I and Part II by identical layer-exchange hole-through (the identical layer-exchange hole-through includes layer-exchange hole-through 201) with
Second primary side PCB220 is connected.Layer-exchange hole-through 201 can be reduced and changed by two partial sharings of the first conductive coil 211
The quantity of layer via.
In the prior art, for individual layer primary side PCB, conductive coil and magnetic pole window are corresponded, conductive coil
Around corresponding magnetic pole window coiling.Each magnetic pole window in multiple magnetic pole windows that i-th (i >=1) layer primary side PCB includes
The conductive coil of mouth periphery is connected by different layer-exchange hole-throughs and kth (k >=1, and k ≠ i) layer primary side PCB.That is, every
The conductive coil of individual magnetic pole window periphery is independent, it is assumed that every layer of primary side PCB is included outside Z magnetic pole window, Z magnetic pole window
Z layer-exchange hole-through group of conductive coil correspondence (quantity for the layer-exchange hole-through that each layer-exchange hole-through group includes and the magnetic pole coiling enclosed
The number of turn of primary side winding is related).And in the embodiment of the present application, the first conductive coil that the first primary side PCB includes is around at least
Two magnetic pole window coilings, the first conductive coil 211 can share layer-exchange hole-through, energy around the part of different magnetic pole window coilings
The quantity for the layer-exchange hole-through that primary side PCB includes enough is reduced, so that so that the flat surface transformer of the application has higher magnetic pole window
Mouth utilization rate.
Further, in the embodiment of the present application, Part I is connected with Part II, and electric current is produced in Part I
Magnetic direction is different in the magnetic direction that Part II is produced from electric current.That is, Part I surrounds the first magnetic pole window
The coiling direction of coiling is different around the coiling direction of the second magnetic pole window coiling from Part II.
As shown in figure 3, Part I surrounds the coiling clockwise of the first magnetic pole window 212, Part II surrounds the second magnetic pole
The coiling counterclockwise of window 213.Alternatively, in the embodiment of the present application, the first conductive coil is pressed around at least two magnetic pole windows
According to figure of eight coiling.Still optionally further, the quantity for the magnetic pole window that at least two magnetic poles window includes is even number, and this is extremely
Few two magnetic pole windows constitute the array of 2 row multiple rows, and first conductive coil 211 is around at least two magnetic poles window
Each row are according to figure of eight coiling.
From the foregoing, it can be understood that first primary side PCB210 includes the first conductive coil 211, first conductive coil 211 has
(shared layer-exchange hole-through characteristic can be understood as shared layer-exchange hole-through characteristic：Conductive coil include around different magnetic pole windows around
The partial sharing layer-exchange hole-through of system), in actual application, first primary side PCB210 can include two kinds of situations：
Situation #1
First primary side PCB210 includes multiple conductive coils for having and sharing layer-exchange hole-through characteristic.
That is, first primary side PCB210 include it is multiple such as the first conductive coils 211 conductive coil (i.e. this first
Conductive coil 211 is any one conductive coil in multiple conductive coils).At least two magnetic pole windows of each conductive coil correspondence
Mouthful, and the different corresponding at least two magnetic poles windows of conductive coil is non-overlapping.I-th of conductive coil in the plurality of conductive coil
Around corresponding magnetic pole window coiling, and i-th of conductive coil changes a layer mistake around the partial sharing of different magnetic pole window coilings
Hole, i-th of conductive coil is any of multiple conductive coils conductive coil.
Further, if the quantity of the corresponding layer-exchange hole-through of the plurality of conductive coil is equal to the corresponding magnetic of the first primary side PCB
The quantity of post, can make primary side PCB have less layer-exchange hole-through.
For the ease of understanding the program, the concept of magnetic pole group of windows can be introduced.I.e., it is assumed that the first primary side PCB includes many
The plurality of magnetic pole window, can be divided into M magnetic pole group of windows by individual magnetic pole window, and each magnetic pole group of windows includes at least two
(for example, it is assumed that the first primary side PCB includes four magnetic pole windows, four magnetic pole windows are divided into two magnetic poles to magnetic pole window
Group of windows, each magnetic pole group of windows includes two magnetic pole windows), correspondingly, first primary side PCB includes M conductive coil, should
M conductive coil is corresponded with M magnetic pole group of windows, and each conductive coil surrounds corresponding magnetic pole window in M conductive coil
Mouth group coiling.Each conductive coil has the characteristic that layer-exchange hole-through is shared, and the program can make primary side PCB have less change
Layer via, to improve the magnetic pole window utilization rate of flat surface transformer.
Further, in the prior art, the number for being used to form the layer-exchange hole-through of primary side winding that every layer of primary side PCB includes
Measure ncMeet：
nc=(N-1) L+3, wherein, N is the number of turn of the primary side winding of the single magnetic pole coiling, and the L is individual layer primary side
The quantity for the magnetic pole window that PCB includes.As shown in Fig. 2 in the prior art, if the number of turn of the primary side winding of magnetic pole coiling is five
Circle, what every layer of primary side PCB included is used to be formed the quantity of the layer-exchange hole-through of primary side winding for 19.
And in the embodiment of the present application, if the quantity of the corresponding layer-exchange hole-through of the plurality of conductive coil is equal to the first primary side
The quantity of the corresponding magnetic poles of PCB is (that is, all magnetic pole windows that the first primary side PCB includes are divided into M magnetic pole window
Group), the quantity n for the layer-exchange hole-through for forming primary side winding that the first primary side PCB210 includes meets below equation：
N=(N-1) M+3；
Wherein, N is the number of turn of the primary side winding of the single magnetic pole coiling, and M is the conductive coil that the first primary side PCB includes
Quantity (or quantity that M is the magnetic pole group of windows that all magnetic pole windows for including of the first primary side PCB are obtained by division), N >=
1, M >=2.
From the foregoing, it can be understood that the quantity of the quantity of the conductive coil and magnetic pole group of windows is corresponded, due to each magnetic pole window
Mouth group includes at least two magnetic pole windows, and the quantity of magnetic pole group of windows is less than the quantity of magnetic pole window, i.e. L>M, the application is implemented
The PCB of the flat surface transformer of example has less layer-exchange hole-through.
It should be noted that the second primary side PCB of the embodiment of the present application can include conductive coil, it can not also include leading
Electric coil (if for example, the second primary side PCB can be primary side top layer PCB hereinafter), this Shen of the second primary side PCB concrete structure
Please be not subject to the limits fixed.
The schematic light of another that Fig. 4 is the primary side PCB according to the flat surface transformer of the embodiment of the present application is drawn.As schemed
Shown in 4, the flat surface transformer includes multilayer primary side PCB, and specifically, the flat surface transformer can include：
Primary side top layer PCB310, the first primary side PCB310a, the second primary side PCB310b, the 3rd primary side PCB310c, the 4th original
Side PCB310c and the 5th primary side PCB310e.
First primary side PCB310a includes two conductive coils, and each conductive coil is around two magnetic pole window coilings.It is single
Individual conductive coil can share layer-exchange hole-through around the part of different magnetic pole windows.
For example, in the conductive coil that the first primary side PCB310a includes, around the first magnetic pole window 312a1The part of coiling
With around the second magnetic pole window 312a2The difference of coiling passes through identical layer-exchange hole-through (i.e. layer-exchange hole-through 301) and the second primary side
PCB310b is connected.Similarly, in the conductive coil that the second primary side PCB310b includes, around the first magnetic pole window 312b1Coiling
Part with around the second magnetic pole window 312b2The different of coiling pass through identical layer-exchange hole-through (i.e. layer-exchange hole-through 302) and the
Three primary side PCB310c are connected.
Comparison diagram 2 and Fig. 4 are understood, for the structure of the primary side PCB shown in Fig. 2, every layer of primary side PCB each magnetic pole
One layer-exchange hole-through group of conductive coil correspondence (each layer-exchange hole-through group includes four layer-exchange hole-throughs) of window periphery, four magnetic
Four conductive coils, 16 layer-exchange hole-throughs of correspondence of post window periphery.
For the structure of the primary side PCB shown in Fig. 4, it can realize that layer-exchange hole-through is shared, around different magnetic pole windows
The part of coiling can realize the shared of layer-exchange hole-through.The conductive coil pair of every layer of primary side PCB each two magnetic pole window periphery
Answer a layer-exchange hole-through group, two conductive coils, eight layer-exchange hole-throughs of correspondence of four magnetic pole window peripheries.The application is implemented
The negligible amounts of the corresponding layer-exchange hole-throughs of every layer of primary side PCB of example.
Fig. 5 is the schematic figure of one of the secondary PCB according to the flat surface transformer of the embodiment of the present application.As shown in figure 5,
Secondary PCB includes the first secondary PCB410a and the second secondary PCB410b.
Specifically, the flat surface transformer of the embodiment of the present application can be included shown in the primary side PCB and Fig. 5 shown in Fig. 4
Secondary PCB.
For example, flat surface transformer can include 16 layers of PCB, the first layer of 16 layers of PCB is primary side top layer PCB310,
Third layer PCB is the first primary side PCB310a, and layer 6 is the second primary side PCB310b, and the 9th layer is the 3rd primary side PCB310c, the
Floor 12 be the 4th primary side PCB310d, the 15th layer be the 5th primary side PCB310e, the second layer, layer 5, the 8th layer, the 11st
Layer, the 14th layer of PCB be the first secondary PCB410a, the 4th layer, layer 7, the tenth layer, the 13rd layer and the 16th layer
PCB is the second secondary PCB410b.
It should be understood that the second layer of the flat surface transformer, layer 5, the 8th layer, eleventh floor, the 14th layer of winding be the
One secondary PCB410a refers to the second layer, layer 5, the 8th layer, eleventh floor, the knot of the 14th layer of winding of flat surface transformer
Structure is identical with the first vice-side winding 410a structure.
Situation #2
First primary side PCB only includes a conductive coil with shared layer-exchange hole-through characteristic.
Optionally one, if the quantity of the corresponding magnetic pole window of the first conductive coil is corresponding with the first primary side PCB
The quantity of magnetic pole is identical, and the quantity n for the layer-exchange hole-through for forming primary side winding that the first primary side PCB210 includes is met
Below equation：N=2N+1；
Wherein, N is the number of turn of the primary side winding of the single magnetic pole coiling, N >=1.
That is, the first conductive coil that first primary side PCB includes surrounds all magnetic poles that the first primary side PCB includes
Pass through identical layer-exchange hole-through and the second primary side PCB per the part of magnetic pole window periphery in window coiling, and the first conductive coil
It is connected, the program can further reduce the quantity for the layer-exchange hole-through that primary side PCB includes, so that primary side PCB is with higher
Magnetic pole window utilization rate.
The schematic light of another that Fig. 6 is the primary side PCB according to the flat surface transformer of the embodiment of the present application is drawn.As schemed
Shown in 6, the flat surface transformer includes multilayer primary side PCB, and specifically, the flat surface transformer includes：
First primary side PCB510a, the second primary side PCB510b, primary side top layer PCB520 and primary side bottom PCB530.
First primary side PCB510a includes a conductive coil, and the conductive coil includes around first primary side PCB510a
All magnetic pole window coilings, the part of each magnetic pole window periphery can pass through identical layer-exchange hole-through in the conductive coil
(such as layer-exchange hole-through 501 and layer-exchange hole-through 502) is connected with primary side top layer 520.
Wherein, the first primary side PCB510a and the second primary side PCB510b includes a conductive coil, the conductor wire corral
All magnetic pole windows (the ten magnetic pole windows) coiling included around this layer of primary side PCB.Specifically, ten magnetic pole window compositions
The array of 2 rows 5 row, the conductive coil is around two magnetic pole windows that often row includes according to figure of eight coiling.
Compared to Fig. 4, the corresponding less layer-exchange hole-throughs of primary side PCB shown in Fig. 6, so as to have more including primary side PCB
Few layer-exchange hole-through, further to improve the magnetic pole window utilization rate of flat surface transformer.
Fig. 7 is the schematic figure of another of the vice-side winding of the flat surface transformer according to the embodiment of the present application.Such as Fig. 7 institutes
Show, the vice-side winding includes the first secondary PCB610a and the second secondary PCB610b.
Specifically, the transformer of the embodiment of the present application can include the secondary shown in the primary side PCB and Fig. 7 shown in Fig. 6
PCB。
For example, flat surface transformer can include 16 layers of PCB, the first layer of 16 layers of PCB is primary side top layer PCB520,
Third layer and layer 6 are the first primary side PCB510a, and the 9th layer and Floor 12 are the second primary side PCB510b, the 14th
Layer be primary side bottom PCB530, the second layer, layer 5, the 8th layer and eleventh floor be the first secondary PCB610a, the 4th layer,
Layer 7, the tenth layer and the 13rd layer are the second secondary PCB610a.
Flat surface transformer in the embodiment of the present application can be applied in various active circuits, passive circuit, due to this
Flat surface transformer has less loss, it is possible to increase the stability of active circuit.
It should be understood that in the embodiment of the present application, " B " corresponding with A represents that B is associated with A, and B can be determined according to A.But
It should also be understood that determining that B is not meant to determine B only according to A according to A, B can also be determined according to A and/or other information.Should
Understand, the terms "and/or", only a kind of incidence relation for describing affiliated partner, expression may have three kinds of relations,
For example, A and/or B, can be represented：Individualism A, while depositing 10 in A and B, these three situations of individualism B.In addition, herein
Middle character "/", it is a kind of relation of "or" to typically represent forward-backward correlation object.
Technical characteristic in a certain embodiment and description above, in order that application documents are succinctly clear, it is possible to understand that be applicable
In other embodiment.It is described above, the only embodiment of the application, but the protection domain of the application is not limited to
This, any one skilled in the art can readily occur in change or replacement in the technical scope that the application is disclosed,
It should all cover within the protection domain of the application.Therefore, the protection domain of the application should the protection model with claim
Enclose and be defined.
Claims (10)
1. a kind of flat surface transformer, it is characterised in that the flat surface transformer includes：Original for forming the flat surface transformer
The multilayer primary side printing board PCB of side winding, the multilayer primary side PCB includes the first primary side PCB (210) and the second primary side
PCB(220)；
The first primary side PCB (210) includes the multiple magnetic pole windows and the first conductive coil (211) for being used to assemble magnetic pole, institute
State at least two magnetic pole window coilings of the first conductive coil (211) in the multiple magnetic pole window；
First magnetic pole window (212) coiling at least two magnetic poles window is surrounded in first conductive coil (211)
Part and the part that second magnetic pole window (213) coiling at least two magnetic poles window is surrounded in first conductive coil
It is connected by identical layer-exchange hole-through (201) with the second primary side PCB (220) in the multi-layer PCB, the first magnetic pole window
(212) and the second magnetic pole window (213) be at least two magnetic poles window (212) in any two magnetic pole window.
2. flat surface transformer according to claim 1, it is characterised in that around the portion of first magnetic pole window (212) coiling
Point it is connected with surrounding the part of second magnetic pole window (213) coiling, electric current surrounds first magnetic pole window (212) coiling described
The magnetic direction that the magnetic direction that part is produced is produced with electric current in the part for surrounding second magnetic pole window (213) coiling is not
Together.
3. flat surface transformer according to claim 1 or 2, it is characterised in that the first primary side PCB (210) is included extremely
At least two magnetic pole windows in a few conductive coil, the multiple magnetic pole window of the conductive coil correspondence, the conduction
Coil surrounds corresponding at least two magnetic poles window coiling, and the corresponding magnetic pole window of different conductive coils is non-overlapping, and described first
Conductive coil (211) is any of at least one conductive coil conductive coil.
4. flat surface transformer according to claim 3, it is characterised in that the corresponding magnetic pole of described at least one conductive coil
The quantity of the quantity of window magnetic pole corresponding with the first primary side PCB (210) is identical.
5. flat surface transformer according to claim 4, it is characterised in that if leading of including of at least one described conductive coil
The quantity of electric coil is more than 1, the quantity n for the layer-exchange hole-through for forming primary side winding that the first primary side PCB (210) includes
Meet below equation：
N=(N-1) M+3；
Wherein, N is the number of turn of the primary side winding of the single magnetic pole coiling, and M is leading that at least one described conductive coil includes
The quantity of electric coil, N >=1, M >=2.
6. flat surface transformer according to claim 4, it is characterised in that if leading of including of at least one described conductive coil
The quantity of electric coil is equal to 1, the quantity n for the layer-exchange hole-through for forming primary side winding that the first primary side PCB (210) includes
Meet below equation：
N=2N+1, N >=1；
Wherein, N is the number of turn of the primary side winding of the single magnetic pole coiling.
7. the flat surface transformer according to any one of claim 3 to 6, it is characterised in that at least one described conductor wire
The quantity for enclosing the conductive coil included is M, and the quantity for the magnetic pole window that at least two magnetic poles window includes is K, wherein, M
>=2, K >=2.
8. flat surface transformer according to claim 1 or 2, it is characterised in that the quantity of at least two magnetic poles window
The quantity of magnetic pole corresponding with the first primary side PCB is identical, and the quantity of at least two magnetic poles window is more than or equal to
4。
9. method according to claim 1 or 2, it is characterised in that at least two magnetic poles window constitutes 2 row multiple rows
Array；
First conductive coil (211) surrounds each row of at least two magnetic poles window according to figure of eight coiling.
10. a kind of active circuit, it is characterised in that the active circuit is included such as any one of claim 1 to claim 9
Described flat surface transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710297210.5A CN106971829B (en) | 2017-04-28 | 2017-04-28 | Flat surface transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710297210.5A CN106971829B (en) | 2017-04-28 | 2017-04-28 | Flat surface transformer |
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| CN106971829B CN106971829B (en) | 2019-03-01 |
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|---|---|---|---|
| CN201710297210.5A Active CN106971829B (en) | 2017-04-28 | 2017-04-28 | Flat surface transformer |
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| CN108183019A (en) * | 2017-12-21 | 2018-06-19 | 华为技术有限公司 | Flat surface transformer, power-switching circuit and adapter |
| CN109841398A (en) * | 2019-02-19 | 2019-06-04 | 南京航空航天大学 | A kind of DC converting system based on integrated planar matrix transformer |
| CN111435624A (en) * | 2019-01-15 | 2020-07-21 | 台达电子企业管理（上海）有限公司 | Magnetic device and method of manufacturing the same |
| US10847297B1 (en) | 2019-10-16 | 2020-11-24 | Hong Kong Applied Science and Technology Research Institute Company, Limited | Low-core-loss transformer with magnetic pillar in center of four corner pillars |
| USD912626S1 (en) | 2019-01-15 | 2021-03-09 | Delta Electronics (Shanghai) Co., Ltd | Magnetic core |
| US11581119B2 (en) | 2019-01-15 | 2023-02-14 | Delta Electronics (Shanghai) Co., Ltd | Magnetic device and method of manufacturing the same |
| US11948722B2 (en) | 2020-09-17 | 2024-04-02 | Chicony Power Technology Co., Ltd. | Planar winding transformer |
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| US10847297B1 (en) | 2019-10-16 | 2020-11-24 | Hong Kong Applied Science and Technology Research Institute Company, Limited | Low-core-loss transformer with magnetic pillar in center of four corner pillars |
| WO2021072790A1 (en) * | 2019-10-16 | 2021-04-22 | Hong Kong Applied Science and Technology Research Institute Company Limited | Low-core-loss transformer with magnetic pillar in center of four corner pillars |
| US11948722B2 (en) | 2020-09-17 | 2024-04-02 | Chicony Power Technology Co., Ltd. | Planar winding transformer |
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| CN106971829B (en) | 2019-03-01 |
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