CN106971829B - Flat surface transformer - Google Patents
Flat surface transformer Download PDFInfo
- Publication number
- CN106971829B CN106971829B CN201710297210.5A CN201710297210A CN106971829B CN 106971829 B CN106971829 B CN 106971829B CN 201710297210 A CN201710297210 A CN 201710297210A CN 106971829 B CN106971829 B CN 106971829B
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- Prior art keywords
- magnetic pole
- primary side
- window
- conductive coil
- layer
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Classifications
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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
Abstract
This application provides a kind of flat surface transformer, flat surface transformer window utilization rate with higher.The flat surface transformer includes: the first primary side PCB (210) and the second primary side PCB (220) for the primary side winding for being used to form the flat surface transformer；The first primary side PCB (210) includes the first conductive coil (211), it is connected by identical layer-exchange hole-through (201) with the second primary side PCB (220) around the part of first magnetic pole window (212) coiling at least two magnetic pole windows with the part for surrounding second magnetic pole window (213) coiling in at least two magnetic poles window in first conductive coil in first conductive coil (211), the first magnetic pole window (212) and the second magnetic pole window (213) are any two magnetic pole window in at least two magnetic poles window (212).
Description
Technical field
This application involves circuit fields, and more particularly, to a kind of flat surface transformer.
Background technique
Transformer is a kind of using mutual electromagnetic inductance, realizes voltage of transformation, the device of electric current and impedance.Transformer is by magnetic pole
It is formed with winding, winding is divided into primary side winding and vice-side winding.Flat surface transformer maximum difference compared with traditional transformer
Difference including winding.Under normal conditions, the winding of flat surface transformer is covered with the print of conductive foil (usually copper foil) using multilayer
Printed circuit board (Printedcircuitboard, PCB) stacks.The appearance of flat surface transformer, substantially reduces transformer
Volume and height enable power module miniaturization, planarization.The magnetic pole window utilization rate of flat surface transformer is to influence plane to become
An important factor for depressor performance, the magnetic pole window utilization rate for how improving flat surface transformer are a technical problem to be solved urgently.
Summary of the invention
The application provides a kind of flat surface transformer, flat surface transformer compared to the prior art, the plane transformation of the application
Device window utilization rate with higher.
In a first aspect, providing a kind of flat surface transformer, the flat surface transformer includes: to be used to form 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 assembling magnetic pole, and described first is conductive
At least two magnetic pole window coilings of the coil in the multiple magnetic pole window；In first conductive coil described in extremely
In few two magnetic pole windows the part of the first magnetic pole window coiling at least two magnetic is surrounded 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 column window
It is connected, the first magnetic pole window and the second magnetic pole window are any two magnetic pole window in at least two magnetic poles window
Mouthful.
In the prior art, for single 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-through and kth (k >=1, and k ≠ i) layer primary side PCB.That is, every
The conductive coil of a magnetic pole window periphery is independent, it is assumed that every layer of primary side PCB includes Z magnetic pole window, outside Z magnetic pole window
The conductive coil enclosed corresponds to Z layer-exchange hole-through group (quantity and magnetic pole coiling for the layer-exchange hole-through that each layer-exchange hole-through group includes
The number of turns 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 are (total 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 sharing layer-exchange hole-through, improves magnetic pole window utilization rate.
In one 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 is enclosed in the magnetic direction and electric current of the part generation for surrounding the first magnetic pole window coiling described
The magnetic direction generated around the part of the second magnetic pole window coiling is different.
In one possible implementation, the first primary side PCB includes at least one conductive coil, the conductor wire
At least two magnetic pole windows in the corresponding the multiple magnetic pole window of circle, the conductive coil surround corresponding at least two magnetic pole
Window coiling, the corresponding magnetic pole window of different conductive coils is non-overlapping, and first conductive coil is that described at least one is conductive
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 be designed according to actual needs
Amount, flat surface transformer compatibility with higher and applicability.
In one possible implementation, the quantity of the corresponding magnetic pole window of at least one described conductive coil with it is described
The quantity of the corresponding magnetic pole of first primary side PCB is identical.
This programme in order to facilitate understanding can introduce the concept of magnetic pole group of windows.I.e., it is assumed that the first primary side PCB includes more
Multiple magnetic pole window, can be divided into M magnetic pole group of windows by a 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 include 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.The characteristic that each conductive coil has layer-exchange hole-through shared, it is less that the program can be such that primary side PCB has
Layer-exchange hole-through, to improve the magnetic pole window utilization rate of flat surface transformer.
The program is conducive to the quantity for further reducing the layer-exchange hole-through that primary side PCB includes, so that the plane of the application
Transformer magnetic pole window utilization rate with higher.
In one possible implementation, if the quantity for the conductive coil that at least one described conductive coil includes is greater than
1, the quantity n for the layer-exchange hole-through for being used to form primary side winding that the first primary side PCB includes meets following formula: n=(N-
1)·M+3；Wherein, N is the number of turns 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 one possible implementation, if the quantity for the conductive coil that at least one described conductive coil includes is equal to
1, the quantity n for the layer-exchange hole-through for being used to form primary side winding that the first primary side PCB includes meets following formula: n=2N+1；
Wherein, N is the number of turns of the primary side winding of the single magnetic pole coiling, N >=1.
In one 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 one possible implementation, the quantity of at least two magnetic poles window with described 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 greater than or equal to 4.
In one possible implementation, at least two magnetic poles window forms the array of 2 row multiple rows；Described first
Conductive coil surrounds each column of at least two magnetic poles window according to figure of eight coiling.
Second aspect, provides a kind of active circuit, and the active circuit includes first aspect or any possibility of first aspect
The flat surface transformer of implementation.
Flat surface transformer provided by the present application, the first primary side PCB include the first conductive coil, which surrounds
At least two magnetic pole window coilings surround the partial sharing layer-exchange hole-through of different magnetic pole window coilings in first conductive coil,
So that primary side PCB has less layer-exchange hole-through, so that flat surface transformer window utilization rate with higher.
Detailed description of the invention
Fig. 1 is the schematic broken away view of the primary side PCB of flat surface transformer and an example of magnetic pole.
Fig. 2 is that the schematic light of an example of two layers of primary side PCB in existing flat surface transformer is drawn.
Fig. 3 is drawn according to the schematic light of primary side PCB an example of the flat surface transformer of the embodiment of the present application.
Fig. 4 is drawn according to primary side PCB another schematic light of the flat surface transformer of the embodiment of the present application.
Fig. 5 is drawn according to the schematic light of an example of the secondary side PCB of the flat surface transformer of the embodiment of the present application.
Fig. 6 is drawn according to the schematic light of the another example of the primary side PCB of the flat surface transformer of the embodiment of the present application.
Fig. 7 is drawn according to another schematic light of the secondary side PCB of the flat surface transformer of the embodiment of the present application.
Specific embodiment
Below in conjunction with attached drawing, the technical solution 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
For assembling the magnetic pole window of 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 ease of description, it is generally the case that be denoted as the PCB for being used to form primary side winding
The PCB for being used to form vice-side winding is denoted as secondary side PCB by primary side PCB.
Fig. 1 is the schematic broken away view of the primary side PCB of flat surface transformer and an example 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 for assemble 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 surround corresponding single magnetic
111 coiling of column window.Pass through layer-exchange hole-through phase in multilayer primary side PCB110 between the conductive coil of different layer 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 hole is connected with another layer of primary side PCB.
Still by taking Fig. 1 as an example, Fig. 2 is that the schematic light of an example of two layers of primary side PCB in existing flat surface transformer is drawn.It 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).
The first primary side PCB110a includes four magnetic pole windows and four conductive coils, the second primary side PCB110b packet
Four magnetic pole windows and four conductive coils are included, the conductive coil of four magnetic pole window peripheries is not by the first primary side PCB
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.And so on, the first primary side PCB110a includes four
A magnetic pole window, the conductive coil of each magnetic pole window periphery passes through different layer-exchange hole-throughs and second in four magnetic pole windows
The conductive coil of primary side PCB110b is connected.
That is, in the prior art, if every layer of PCB includes Z magnetic pole window, the Z of the Z magnetic pole window periphery is a
Conductive coil corresponds to 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 turns of winding is related).
The quantity of the layer-exchange hole-through that PCB includes and the magnetic pole window utilization rate of flat surface transformer are negatively correlated, that is, PCB includes
Layer-exchange hole-through quantity it is fewer, the magnetic pole window utilization of flat surface transformer is higher, and therefore, the embodiment of the present application proposes a kind of flat
Face transformer, the flat surface transformer have less layer-exchange hole-through, so that flat surface transformer magnetic pole window benefit with higher
With rate.
Fig. 3 is drawn according to the schematic light of primary side PCB an example of the flat surface transformer of the embodiment of the present application.Such as Fig. 3 institute
Show, which includes:
It is used to form the multilayer primary side printing board PCB of the primary side winding of 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 assembling magnetic pole, institute
State at least two magnetic pole window coilings of first conductive coil 211 in the multiple magnetic pole window；
Around 212 coiling of the first magnetic pole window in at least two magnetic poles window in first conductive coil 211
Part and the part that 213 coiling of the second magnetic pole window in at least two magnetic poles window is surrounded in first conductive coil are logical
It crosses identical layer-exchange hole-through 201 to be connected with the second primary side PCB220 in the multi-layer PCB, 212 He of the first magnetic pole window
The second magnetic pole window 213 is any two magnetic pole window in 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 surrounds multiple magnetic pole window coilings, and around not in the first conductive coil 211
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
Existing layer-exchange hole-through is shared.
As shown in figure 3, the magnetic pole window that first conductive coil 211 surrounds includes the first magnetic pole window 212 and the second magnetic
Column window 213.It is enclosed in the part of 212 coiling of the first magnetic pole window and the first conductive coil 211 in first conductive coil 211
It is connected by identical layer-exchange hole-through 201 with the second primary side PCB220 around the part of 213 coiling of the second magnetic pole window.
For ease of description, " part of 212 coiling of the first magnetic pole window can will be surrounded in the first conductive coil 211 " to remember
For " first part ", " part of 213 coiling of the second magnetic pole window is surrounded in the first conductive coil 211 " is denoted as " second
Point ", the first part and second part by identical layer-exchange hole-through (the identical layer-exchange hole-through includes layer-exchange hole-through 201) and
Second primary side PCB220 is connected.Layer-exchange hole-through 201 can be reduced and be changed by two partial sharings of the first conductive coil 211
The quantity of layer via hole.
In the prior art, for single 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-through and kth (k >=1, and k ≠ i) layer primary side PCB.That is, every
The conductive coil of a magnetic pole window periphery is independent, it is assumed that every layer of primary side PCB includes Z magnetic pole window, outside Z magnetic pole window
The conductive coil enclosed corresponds to Z layer-exchange hole-through group (quantity and magnetic pole coiling for the layer-exchange hole-through that each layer-exchange hole-through group includes
The number of turns 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 enough reducing the layer-exchange hole-through that primary side PCB includes, thus so that the flat surface transformer of the application magnetic pole window with higher
Mouth utilization rate.
Further, in the embodiment of the present application, first part is connected with second part, and electric current is generated in first part
Magnetic direction is different from the magnetic direction that electric current is generated in second part.That is, first part 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 second part.
As shown in figure 3, first part surrounds the coiling clockwise of the first magnetic pole window 212, second part surrounds the second magnetic pole
The coiling counterclockwise of window 213.Optionally, 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 which includes is even number, this is extremely
Few two magnetic pole windows form the array of 2 row multiple rows, and first conductive coil 211 is around at least two magnetic poles window
Each column are according to figure of eight coiling.
From the foregoing, it can be understood that the first primary side PCB210 includes the first conductive coil 211, which has
Shared layer-exchange hole-through characteristic (shared layer-exchange hole-through characteristic it is to be understood that 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 may include two kinds of situations:
Situation #1
First primary side PCB210 includes multiple conductive coils with shared 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).The corresponding at least two magnetic pole windows of each conductive coil
Mouthful, and the different corresponding at least two magnetic poles windows of conductive coil is non-overlapping.I-th of conductive coil in multiple 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 are any of multiple conductive coils conductive coil.
Further, if the quantity of the corresponding layer-exchange hole-through of multiple conductive coil is equal to the corresponding magnetic of the first primary side PCB
The quantity of column can make primary side PCB have less layer-exchange hole-through.
The program in order to facilitate understanding can introduce the concept of magnetic pole group of windows.I.e., it is assumed that the first primary side PCB includes more
Multiple magnetic pole window, can be divided into M magnetic pole group of windows by a 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, which is divided into two magnetic poles to magnetic pole window
Group of windows, each magnetic pole group of windows include 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.The characteristic that each conductive coil has layer-exchange hole-through shared, the program can make primary side PCB have less change
Layer via hole, to improve the magnetic pole window utilization rate of flat surface transformer.
Further, in the prior art, the number for the layer-exchange hole-through for being used to form primary side winding that every layer of primary side PCB includes
Measure ncMeet:
nc=(N-1) L+3, wherein N is the number of turns of the primary side winding of the single magnetic pole coiling, which is single 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 turns of the primary side winding of magnetic pole coiling is five
Circle, the quantity for the layer-exchange hole-through for being used to form primary side winding that every layer of primary side PCB includes are 19.
And in the embodiment of the present application, if the quantity of the corresponding layer-exchange hole-through of multiple conductive coil is equal to the first primary side
The quantity of the corresponding magnetic pole 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 being used to form primary side winding that the first primary side PCB210 includes meets following formula:
N=(N-1) M+3；
Wherein, N is the number of turns 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 M be the magnetic pole group of windows that the first primary side PCB all magnetic pole windows for including are obtained by division quantity), 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 corresponds, 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, that is, L > M, the application are 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 may include conductive coil, it can not also include leading
Electric coil (for example, if the second primary side PCB can be primary side top layer PCB hereinafter), this Shen of the specific structure of the second primary side PCB
It please be not subject to the limits fixed.
Fig. 4 is drawn according to another schematic light of the primary side PCB of the flat surface transformer of the embodiment of the present application.Such as figure
Shown in 4, which includes multilayer primary side PCB, and specifically, which may include:
Primary side top layer PCB310, the first primary side PCB310a, the second primary side PCB310b, third primary side PCB310c, the 4th original
Side PCB310c and the 5th primary side PCB310e.
The first primary side PCB310a includes two conductive coils, and each conductive coil surrounds two magnetic pole window coilings.It is single
A conductive coil can share layer-exchange hole-through around the part of different magnetic pole windows.
For example, surrounding the first magnetic pole window 312a in the conductive coil that the first primary side PCB310a includes1The part of coiling
With surround 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, the first magnetic pole window 312b is surrounded1Coiling
Part with surround the second magnetic pole window 312b2The difference of coiling passes 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 it is found that for the structure of primary side PCB shown in Fig. 2, each magnetic pole of every layer of primary side PCB
The corresponding layer-exchange hole-through group of the conductive coil of window periphery (each layer-exchange hole-through group includes four layer-exchange hole-throughs), four magnetic
Corresponding 16 layer-exchange hole-throughs of four conductive coils of column window periphery.
For the structure of primary side PCB shown in Fig. 4, it can be realized layer-exchange hole-through and share, surround different magnetic pole windows
The part of coiling can be realized the shared of layer-exchange hole-through.The conductive coil pair of the every two magnetic pole window periphery of every layer of primary side PCB
Answer a layer-exchange hole-through group, corresponding eight layer-exchange hole-throughs of two conductive coils of four magnetic pole window peripheries.The application is implemented
The negligible amounts of the corresponding layer-exchange hole-through of every layer of primary side PCB of example.
Fig. 5 is the schematic figure according to an example of the secondary side PCB of the flat surface transformer of the embodiment of the present application.As shown in figure 5,
The pair pair of PCB410a and second side PCB410b when PCB includes first secondary.
Specifically, the flat surface transformer of the embodiment of the present application may include primary side PCB shown in Fig. 4 and shown in fig. 5
Secondary side PCB.
For example, flat surface transformer may 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 third primary side PCB310c, the
Floor 12 is the 4th primary side PCB310d, and the 15th layer is the 5th primary side PCB310e, the second layer, layer 5, the 8th layer, the 11st
Layer, the 14th layer of PCB are the first pair side PCB410a, the 4th layer, layer 7, the tenth layer, the 13rd layer and the 16th layer
PCB is the second pair side 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 pair side PCB410a refers to the second layer of flat surface transformer, layer 5, the 8th layer, the knot of eleventh floor, the 14th layer of winding
Structure is identical as the structure of the first vice-side winding 410a.
Situation #2
First primary side PCB only includes a conductive coil with shared layer-exchange hole-through characteristic.
Optionally an example, 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 being used to form primary side winding that the first primary side PCB210 includes meets
Following formula: n=2N+1；
Wherein, N is the number of turns 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
Window coiling, and the part of every magnetic pole window periphery passes through identical layer-exchange hole-through and the second primary side PCB in the first conductive coil
It is connected, the program can be further reduced 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.
Fig. 6 is drawn according to another schematic light of the primary side PCB of the flat surface transformer of the embodiment of the present application.Such as figure
Shown in 6, which includes multilayer primary side PCB, and specifically, which includes:
First primary side PCB510a, the second primary side PCB510b, primary side top layer PCB520 and primary side bottom PCB530.
The first primary side PCB510a includes a conductive coil, which 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 for including around this layer of primary side PCB.Specifically, ten magnetic pole window compositions
The array of 2 rows 5 column, two magnetic pole windows which includes around every row are according to figure of eight coiling.
Compared to Fig. 4, primary side PCB shown in fig. 6 corresponds to less layer-exchange hole-through, so as to include that primary side PCB has more
Few layer-exchange hole-through, to further increase the magnetic pole window utilization rate of flat surface transformer.
Fig. 7 is another schematic figure according to the vice-side winding of the flat surface transformer of the embodiment of the present application.Such as Fig. 7 institute
Show, which includes the first secondary PCB610b when PCB610a and second is secondary.
Specifically, the transformer of the embodiment of the present application may include primary side PCB shown in fig. 6 and secondary side shown in Fig. 7
PCB。
For example, flat surface transformer may include 16 layers of PCB, the first layer of 16 layers of PCB be 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 is primary side bottom PCB530, and the second layer, layer 5, the 8th layer and eleventh floor are the first pair side PCB610a, the 4th layer,
Layer 7, the tenth layer and the 13rd layer are the second pair side PCB610a.
Flat surface transformer in the embodiment of the present application can be applied to various active circuits, in passive circuit, due to this
Flat surface transformer has lesser loss, can be improved the stability of active circuit.
It should be understood that in the embodiment of the present application, " B corresponding with A " indicates that B is associated with A, 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.It answers
Understand, the terms "and/or", only a kind of incidence relation for describing affiliated partner, indicates may exist three kinds of relationships,
For example, A and/or B, can indicate: individualism A, while 10 are deposited in A and B, these three situations of individualism B.In addition, herein
Middle character "/" typicallys represent the relationship that forward-backward correlation object is a kind of "or".
Technical characteristic and description in the above a certain embodiment, in order to keep application documents succinctly clear, it is possible to understand that be applicable in
In other embodiments.The above, the only specific embodiment of the application, but the protection scope of the application is not limited to
This, anyone skilled in the art within the technical scope of the present application, can easily think of the change or the replacement,
Should all it cover within the scope of protection of this application.Therefore, the protection scope of the application answers the protection model with claim
Subject to enclosing.
Claims (10)
1. a kind of flat surface transformer, which is characterized in that the flat surface transformer includes: the original for being used to form the flat surface transformer
The multilayer primary side printing board PCB of side winding, the multilayer primary side PCB include 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 assembling magnetic pole, institute
State at least two magnetic pole window coilings of the first conductive coil (211) in the multiple magnetic pole window；
Around first magnetic pole window (212) coiling in at least two magnetic poles window in first conductive coil (211)
Part and the part that second magnetic pole window (213) coiling in 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) is any two magnetic pole window in at least two magnetic poles window (212).
2. flat surface transformer according to claim 1, which is characterized in that surround the portion of first magnetic pole window (212) coiling
Point it is connected with the part for surrounding second magnetic pole window (213) coiling, electric current surrounds first magnetic pole window (212) coiling described
The magnetic direction that the part that the magnetic direction and electric current that part generates surround second magnetic pole window (213) coiling described generates is not
Together.
3. flat surface transformer according to claim 1, which is characterized in that the first primary side PCB (210) includes at least one
A conductive coil, the conductive coil correspond at least two magnetic pole windows in the multiple magnetic pole window, the conductive coil
Around corresponding at least two magnetic poles window coiling, the corresponding magnetic pole window of different conductive coils is non-overlapping, and described first is conductive
Coil (211) is any of at least one conductive coil conductive coil.
4. flat surface transformer according to claim 3, which is characterized 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, which is characterized in that if at least one described conductive coil leading of including
The quantity of electric coil is greater than 1, the quantity n for the layer-exchange hole-through for being used to form primary side winding that the first primary side PCB (210) includes
Meet following formula:
N=(N-1) M+3；
Wherein, N is the number of turns of the primary side winding of the single magnetic pole coiling, and M leads for what at least one described conductive coil included
The quantity of electric coil, N >=1, M >=2.
6. flat surface transformer according to claim 4, which is characterized in that if at least one described conductive coil leading of including
The quantity of electric coil is equal to 1, the quantity n for the layer-exchange hole-through for being used to form primary side winding that the first primary side PCB (210) includes
Meet following formula:
N=2N+1, N >=1；
Wherein, N is the number of turns of the primary side winding of the single magnetic pole coiling.
7. flat surface transformer according to any one of claim 3 to 6, which is characterized in that at least one described conductor wire
The quantity for the conductive coil that circle includes 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, which is characterized 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 greater than or equal to
4。
9. flat surface transformer according to claim 1 or 2, which is characterized in that at least two magnetic poles window forms 2 rows
The array of multiple row；
First conductive coil (211) surrounds each column of at least two magnetic poles window according to figure of eight coiling.
10. a kind of active circuit, which is characterized in that the active circuit includes such as any one of claim 1 to claim 9
The 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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| 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 true CN106971829B (en) | 2019-03-01 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108183019B (en) * | 2017-12-21 | 2019-09-13 | 华为技术有限公司 | Flat surface transformer, power-switching circuit and adapter |
| CN111435624B (en) * | 2019-01-15 | 2021-08-13 | 台达电子企业管理（上海）有限公司 | Magnetic device and method of manufacturing the same |
| USD912626S1 (en) | 2019-01-15 | 2021-03-09 | Delta Electronics (Shanghai) Co., Ltd | Magnetic core |
| CN111435625B (en) | 2019-01-15 | 2021-07-06 | 台达电子企业管理（上海）有限公司 | Magnetic device and method of manufacturing the same |
| 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 |
| 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 |
| TWI747508B (en) | 2020-09-17 | 2021-11-21 | 群光電能科技股份有限公司 | Planar winding transformer |
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| JP2004014940A (en) * | 2002-06-10 | 2004-01-15 | Nissan Motor Co Ltd | Sheet coil |
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| US7180397B1 (en) * | 2004-02-20 | 2007-02-20 | Tyco Electronics Power Systems, Inc. | Printed wiring board having edge plating interconnects |
| CN102446620A (en) * | 2011-11-30 | 2012-05-09 | 中国航空工业集团公司第六三一研究所 | High-frequency flat-panel transformer |
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