CN208189365U - A kind of flat surface transformer and electronic equipment - Google Patents
A kind of flat surface transformer and electronic equipment Download PDFInfo
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- CN208189365U CN208189365U CN201820576007.1U CN201820576007U CN208189365U CN 208189365 U CN208189365 U CN 208189365U CN 201820576007 U CN201820576007 U CN 201820576007U CN 208189365 U CN208189365 U CN 208189365U
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Abstract
The utility model relates to planar transformer technology fields, more particularly to a kind of flat surface transformer and electronic equipment.Wherein, flat surface transformer includes the first magnetic core, at least one PCB winding, at least one flatwise coil, at least one Ritz coil windings and the second magnetic core, each PCB winding in the first magnetic core, at least one PCB winding, each flatwise coil at least one flatwise coil, each Ritz coil windings and the second magnetic core is concentric is assembled into flat surface transformer at least one Ritz coil windings.On the one hand, since using PCB winding, flatwise coil and Ritz coil windings, as primary/secondary coil, relatively traditional coiled wire-wound coil has stronger overcurrent capability.On the other hand, Ritz coil windings have insulating layer, can reduce kindred effect, and also increase the coefficient of coup of flat surface transformer, reduce leakage inductance.
Description
Technical field
The utility model relates to planar transformer technology fields, more particularly to a kind of flat surface transformer and electronic equipment.
Background technique
Transformer realizes the conversion of voltage using electromagnetic induction principle.Transformer includes primary coil, secondary coil and magnetic
Core, in general, user according to product demand, can voluntarily adjust the number of turns of primary coil or secondary coil and constitute high frequency transformation
Device.For example, referring to Fig. 1, Fig. 1 is that traditional technology provides a kind of schematic illustration of transformer.As shown in Figure 1, for the number of turns
Big primary coil and secondary coil, user constitute transformer and arranging multilayer primary coil and secondary coil.
In the implementation of the present invention, discovery traditional technology is the prior art has at least the following problems: due to just/secondary wire by inventor
The number of plies of circle is more, and kindred effect is bigger, and also increases the parasitic capacitance of transformer, so as to cause the power density of transformer
Small, volume is excessive.
Utility model content
One purpose of the utility model embodiment is intended to provide a kind of flat surface transformer and electronic equipment, power density ratio
Larger and volume is smaller.
In order to solve the above technical problems, the utility model embodiment the following technical schemes are provided:
In a first aspect, the utility model embodiment provides a kind of flat surface transformer, including the first magnetic core, at least one
PCB winding, at least one flatwise coil, at least one Ritz coil windings and the second magnetic core, first magnetic core, it is described at least
Each PCB winding in one PCB winding, each flatwise coil, at least one described Ritz at least one described flatwise coil
Each Ritz coil windings and second magnetic core is concentric is assembled into the flat surface transformer in coil windings.
Optionally, the flat surface transformer includes at least two PCB windings, each PCB winding, each described flat
Coil, in addition each PCB winding and each Ritz coil windings are sequentially assembled.
Optionally, whole PCB winding at least one PCB winding described in series/parallel.
Optionally, whole flatwise coils and/or at least one described benefit at least one flatwise coil described in series/parallel
Hereby each Ritz coil windings in coil windings.
Optionally, the flatwise coil includes Alpha's flatwise coil.
Optionally, the PCB winding is armature winding, and the flatwise coil and/or the Ritz coil windings are secondary
Winding；Alternatively, the PCB winding is secondary windings, the flatwise coil and/or the Ritz coil windings are armature winding.
Optionally, PCB winding includes M layers of PCB coil, and every layer of PCB coil of the M layers of PCB coil can be used as primary line
Circle or secondary coil, and in the PCB winding, primary coil replaces assembly with secondary coil, and M is positive integer, and M >=1.
Optionally, first magnetic core or second magnetic core include pedestal, the first side wall, second sidewall and magnetic core
Column, the first side wall are set to pedestal side, and second sidewall is set to the pedestal other side, and the first side wall is opposite with second sidewall, magnetic
Stem is set to the middle part of pedestal.
Optionally, the side of the first side wall towards the magnetic core column is provided with the first groove, the second sidewall court
The side of the magnetic core column is provided with the second groove；
The PCB winding includes the first protrusion and the second protrusion, and first protrusion is fastened in first groove, institute
The second protrusion is stated to be fastened in second groove.
In second aspect, the utility model embodiment provides a kind of electronic equipment, including described in any item plane transformations
Device.
In each embodiment of the utility model, flat surface transformer includes the first magnetic core, at least one PCB winding, at least
One flatwise coil, at least one Ritz coil windings and the second magnetic core, each PCB in the first magnetic core, at least one PCB winding
Each flatwise coil in winding, at least one flatwise coil, at least one Ritz coil windings each Ritz coil windings and
Second magnetic core is concentric to be assembled into the flat surface transformer.On the one hand, due to using PCB winding, flatwise coil and litz wire
Winding is enclosed as primary/secondary coil, relatively traditional coiled wire-wound coil has stronger overcurrent capability.On the other hand, when need
When designing the more primary/secondary coil of the number of turns, since flatwise coil is under relatively small volume, can laterally it increase
Plus/minus lacks the number of turns, therefore, at the beginning of can relatively avoiding the need for assembly multilayer/and secondary coil, and then reduce kindred effect and post
Raw capacitor, and improve power density and reduce temperature rise.Yet another aspect, Ritz coil windings have insulating layer, can drop
Low kindred effect, and also increase the coefficient of coup of flat surface transformer, reduce leakage inductance.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not constituted to embodiment, the element in attached drawing with same reference numbers label are expressed as similar element, remove
Non- to have special statement, composition does not limit the figure in attached drawing.
Fig. 1 is that traditional technology provides a kind of schematic illustration of transformer；
Fig. 2 is that the utility model embodiment provides a kind of decomposition diagram of flat surface transformer；
Fig. 3 is the structural schematic diagram of the first magnetic core in Fig. 2；
Fig. 4 is the structural schematic diagram of PCB winding in Fig. 2；
Fig. 5 is the structural schematic diagram of flatwise coil in Fig. 2；
Fig. 5 a is the structural schematic diagram of Ritz coil windings in Fig. 2；
Fig. 6 is that the utility model embodiment provides a kind of principle schematic diagram of flat surface transformer；
Fig. 7 is that another embodiment of the utility model provides a kind of principle schematic diagram of flat surface transformer；
Fig. 8 is that the utility model embodiment provides a kind of flow diagram of flat surface transformer production method；
Fig. 9 is the flow diagram of step 81 in Fig. 8.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Utility model is not used to limit the utility model.
Before illustrating the utility model embodiment, A brief introduction first is made to kelvin effect and kindred effect herein.Collect skin
Effect refers to when having alternating current or alternating electromagnetic field in conductor, and current convergence is the conductor appearance thin layer the phenomenon that.Neighbouring effect
When should refer to when high-frequency current the flowing reversely with each other in two conductors or flow in a reciprocal conductor, electric current, which can be concentrated in, is led
The special physical phenomenon of one kind of body adjacent side flowing.Kelvin effect and kindred effect all reduce the performance of high frequency transformer.?
In high frequency transformer, in contrast, in the flat surface transformer using flat structure coil, multilayer kindred effect compares kelvin effect
It is more serious.Conductive area is only limited in a part on surface and increases copper loss by kelvin effect, it does not change electric current good fortune
Value, only changes the current density on coiling surface.And drawn in kindred effect by the variable magnetic field that adjacent coil layers electric current generates
The vortex risen, size exponentially increase with the increase of the coil number of plies.
Therefore, such as preceding elaboration traditional technology, kindred effect is great on the influence of transformer working performance.Also, it passes
The transformer that system technology provides also results in AC/DC impedance ratio (FR=RAC/RDC) obviously increase.
Based on this, the utility model embodiment provides a kind of flat surface transformer.Wherein, which can be applied to
Each class of electronic devices, for example, the electronic equipment is power-supply device or motor driving apparatus etc..
Referring to Fig. 2, flat surface transformer 200 include the first magnetic core 21, PCB winding 22, flatwise coil 23, Ritz coil around
Group 24 and the second magnetic core 25.In some embodiments, the quantity of PCB winding 22 can be one, can also be two or more.It is flat
The quantity of flat coil 23 can be one, can also be two or more.The quantity of Ritz coil windings 24 can be one, also may be used
Think two or more.As shown in Fig. 2, flat surface transformer 200 includes 3 PCB windings, 22,2 flatwise coils 23 and 1 litz wire
Enclose winding 24, user can voluntarily be selected according to product demand the PCB winding, flatwise coil and Ritz coil of corresponding number around
Group.
The magnetic metal oxide that first magnetic core 21 or the second magnetic core 25 can be made of iron oxide mixture.On for example,
Stating magnetic core can be made using manganese-zinc ferrite and nickel-zinc Ferrite Material.Above-mentioned magnetic core can be any appropriate shape
Shape, for example, " E " type magnetic core etc..
PCB winding 22 can be made using following methods: provide the metal form and non-metallic insulation of prefabricated figure
Metal form is placed in particular manufacturing craft by medium, and non-metallic insulation medium is laid in up and down the two of metal form respectively
Face melts non-metallic insulation medium, so as to non-metallic insulation media packs metal form and form product substrate.According to product need
It asks, the product substrate of corresponding number is laminated, the product substrate of corresponding number after stacking is cut, to form PCB winding.Each product
Overlapped way between substrate includes: the product substrate corresponding position processing fixation hole after stacking and makes to fix hole metallization,
To form plated through-hole, aperture, shape and the quantity of plated through-hole are determined according to the operating current of circuit board.By Related product substrate
Lamination is carried out by technology hole, further to process, user can form final PCB winding according to the design needs.
Wherein, include several copper foil regions with the metal form of prefabricated figure, by copper foil region connected it is discrete
Element is different, and the copper foil circuit width positioned at copper foil region will be different.The metal form includes copper foil template, aluminium foil template
And other material templates etc., wherein the copper foil template can be red copper template.
In order to realize that PCB winding can select the metal of corresponding thickness according to product demand by high current, user
Template is to make circuit board.For example: being copper foil template as example using metal form, user, which can choose thickness, to be
30oz to 200oz or copper foil template greater than 200oz, the copper foil template of this thickness range pass through in which can be realized high current.
In the present embodiment, user can select the non-metallic insulation medium of N layers of metal form and N+1 according to product demand
It is laid and is melted, such as: when user needs 3 layers of metal form, it can choose 4 layers of non-metallic insulation medium and lay respectively
Any metal form in this 3 layers of metal forms, wherein the adjacent surface of adjacent metal template shares same non-metallic insulation medium.
It is connected using metallization soldering hole by metallic conductor between each PCB winding, forms primary or secondary
Grade.
In the present embodiment, PCB winding has the specific stress levels of safety and turn-to-turn stress levels.Meanwhile PCB winding has
Overcoming for effect and faces side effect bring fuel factor at kelvin effect, passes through optimization copper layer thickness and interlayer spacings size, the line
Circle has optimal AC DC impedance ratio, to substantially increase window utilization rate.
Flatwise coil 23 passes through narrow side radial direction and broadside axial direction coiling using the flat film envelope curve of certain specific stress levels
Made of technique coiling.Due to the copper wire that the cross section of flatwise coil 23 is rectangle (square), cross section is different from as circle
The conventional coil winding of shape, since the copper wire flattening of flatwise coil 23 passes through under the same window area of flat surface transformer
Horizontal and vertical two around to winding, flatwise coil 23 is capable of providing sufficiently large window fill factor, therefore, the present embodiment
The window fill factor of the flat surface transformer of offer is bigger, and window utilization rate is big.Since window fill factor is bigger, relatively
The current density on ground, flatwise coil 23 is bigger, therefore the flat surface transformer can be by high current, and power to volume ratio is high, and
And the temperature rise of the flat surface transformer is relatively low.
It is connected using metallization soldering hole by metallic conductor between each PCB winding, forms primary or secondary
Grade.
In the present embodiment, PCB winding has the stress levels of safety pressure resistance Deng Ji≤1500V and turn-to-turn 750V.Meanwhile
PCB winding effectively overcomes kelvin effect and faces side effect bring fuel factor, passes through optimization copper layer thickness and interlayer spacings
Size, which has optimal AC DC impedance ratio, to substantially increase window utilization rate.
In the present embodiment, the Manufacturing Techniques of Ritz coil windings 24 are using Ritz grades≤2500Vrms such as pressure resistances
Line coiling forms, in the case where umber of turn is more, since litz wire can effectively avoid kelvin effect and face the heat of side effect
Resistance loss.
In the present embodiment, the first magnetic core 21, PCB winding 22, flatwise coil 23, Ritz coil windings 24 and the second magnetic core
25 concentric are assembled into flat surface transformer 200.
When the quantity of PCB winding 22 is 1, the quantity of flatwise coil 23 is 1, and the quantity of Ritz coil windings 24 is 1
When a, the first magnetic core 21, PCB winding 22, flatwise coil 23, Ritz coil windings 24 and the sequentially concentric assembly of the second magnetic core 25
At flat surface transformer 200.
When the quantity of PCB winding 22 is 2 or more, the quantity of flatwise coil 23 is 2 or more, Ritz coil windings 24
When quantity is 2 or more, each PCB winding 22 in the first magnetic core 21, two or more PCB winding, in two or more flatwise coil
Each Ritz coil windings 24 and the concentric assembly of the second magnetic core 25 in each flatwise coil 23, more than two Ritz coil windings
At flat surface transformer 200.Wherein, user can according to product demand, select two or more PCB winding in each PCB winding 22,
Each Ritz coil windings 24 in each flatwise coil 23 and more than two Ritz coil windings in more than two flatwise coils
Between rigging position relationship, for example, it can be following rigging position relationship:
1, the first magnetic core-PCB winding-flatwise coil-PCB winding-Ritz coil windings-PCB winding-flatwise coil-PCB
Winding-the second magnetic core of Ritz coil windings --- ---；
2, the first magnetic core-PCB winding-PCB winding-PCB winding-flatwise coil-PCB winding-Ritz coil windings-PCB
The second magnetic core of winding-flatwise coil --- ---；
3, the first magnetic core-PCB winding-flatwise coil-PCB winding-PCB winding-PCB winding-flatwise coil-PCB winding-
The second magnetic core of flatwise coil --- ---；
4, the first magnetic core-flatwise coil-flatwise coil-PCB winding-Ritz coil windings-PCB winding-flatwise coil-
PCB winding-the second magnetic core of flatwise coil --- ---；
5, the first magnetic core-PCB winding-flatwise coil-PCB winding-flatwise coil-flatwise coil-flatwise coil-PCB around
Group-the second magnetic core of Ritz coil windings --- ---；
6, the first magnetic core-Ritz coil windings-Ritz coil windings-PCB winding-Ritz coil windings-PCB winding-is flat
Flat coil-PCB winding-the second magnetic core of flatwise coil --- ---；
7, the first magnetic core-PCB winding-flatwise coil-PCB winding-Ritz coil windings-Ritz coil windings-litz wire
Enclose winding-PCB winding-the second magnetic core of flatwise coil --- ---；
……
Foregoing rigging position relationship, at the 1st kind, each PCB winding 22, each flatwise coil 23, in addition each
PCB winding 22 and each Ritz coil windings 24 are sequentially assembled.It is surface insulated relatively good due to PCB winding, and PCB around
Group 22 replaces assembly with flatwise coil 23, and the kindred effect for the flat surface transformer that thus rigging position relationship is constituted is minimum,
Performance is relatively good.
Therefore, because the flatwise coil that the present embodiment is adopted can not be excessive increase flatwise coil the number of plies, but increase
Add the number of turns of each flatwise coil single layer, then alternately arranged form is layered using primary and secondary coil, therefore, in flat surface transformer
While window area great utilization rate, overcome the negative effect of kelvin effect and kindred effect, reduce parasitic capacitance and
Reduce leakage inductance, it is final to promote flat surface transformer overall power density and efficiency.
In the present embodiment, user can voluntarily determine PCB winding 22, flatwise coil 23 and benefit according to product demand
Hereby coil windings 24 are used as armature winding or secondary windings, such as: whole PCB windings 22 are armature winding, whole flatwise coils
23 and Ritz coil windings 24 be secondary windings；Whole PCB windings 22 are secondary windings, whole flatwise coils 23 and Ritz
Coil windings 24 are armature winding；A part of PCB winding 22 is primary/secondary winding, another part PCB winding 22 be it is secondary/
Armature winding, similarly, a part of flatwise coil 23 is primary/secondary winding, another part flatwise coil 23 be it is secondary/primary around
Group.Similarly, a part of Ritz coil windings 24 are primary/secondary winding, and another part Ritz coil windings 24 are secondary/primary
Winding.
In the present embodiment, user can also be according to product demand, by part/whole PCB winding 22, part/all flat
Flat coil 23 and part/whole Ritz coil windings 24 carry out series/parallel, such as: at least one PCB of series/parallel around
Whole PCB winding 22 in group, whole flatwise coils 22 at least one flatwise coil of series/parallel, series/parallel at least one
Whole Ritz coil windings 24 in the coil windings of Ritz；Alternatively, by least one PCB winding part PCB winding 22 series connection/simultaneously
Join, 22 parallel/series of another part PCB winding, flatwise coil 23 series/parallel in part at least one flatwise coil is another
23 parallel/series of part flatwise coil, litz wire circle winding 24 series/parallel in part at least one Ritz coil windings, separately
A part of 24 parallel/series of Ritz coil windings；Alternatively, by part PCB winding 22 at least one PCB winding, at least one
In flatwise coil in part flatwise coil 23 and at least one Ritz coil windings part litz wire circle winding 24 connect together/
Parallel connection, part litz wire in another part PCB winding 22, another part flatwise coil 23 and another part Ritz coil windings
Enclose the parallel/series together of winding 24.
To sum up, on the one hand, due to using PCB winding, flatwise coil and Ritz coil windings as primary/secondary line
Circle, relatively traditional coiled wire-wound coil, has stronger overcurrent capability.On the other hand, more just when needing to design the number of turns
When grade/secondary coil, since flatwise coil is under relatively small volume, it can laterally increase/reduce the number of turns, it therefore, can
At the beginning of relatively to avoid the need for assembly multilayer/secondary coil, and then kindred effect and parasitic capacitance are reduced, and raising power is close
Degree and reduction temperature rise.Yet another aspect, Ritz coil windings have insulating layer, can reduce kindred effect, and also increase
The coefficient of coup of flat surface transformer reduces leakage inductance.
Referring to Fig. 3, the first magnetic core 21 is identical as the shape of the second magnetic core 25.It is example, the first magnetic with the first magnetic core 21
Core 21 includes pedestal 210, the first side wall 211, second sidewall 212 and magnetic core column 213, and the first side wall 211 is set to pedestal 210
Side, second sidewall 212 are set to 210 other side of pedestal, and the first side wall 211 and second sidewall 212 are opposite.Magnetic core column 213 is set
It is placed in the middle part of pedestal 210, magnetic core column 213 is in cylindrical body.
Each PCB winding 22 of the flat surface transformer 200 replaces assembly with flatwise coil 23.
Referring to Fig. 4, PCB winding 22 is provided with axle center hole 221, several spliced eyes 222 and several metal apertures 223.Magnetic
Stem 213 can run through axle center hole 221, and the diameter of axle center hole 221 is adapted with the diameter of magnetic core column 213.Spliced eye 222 be used for
Flatwise coil 23 connects, and metal aperture 223 with external circuit or equipment for connecting.
Foregoing flatwise coil 23 can be single-layer flat coil, can also be two layers or more flatwise coil.
Referring to Fig. 5, flatwise coil 23 is Alpha's flatwise coil, the number of plies of Alpha's flatwise coil is 2 layers, every layer
The number of turns of Alpha's flatwise coil is greater than or equal to 2 circles, for example, the number of turns of every layer of Alpha's flatwise coil is 3 circles.Flatwise coil
23 include coil input end 231 and coil output 232, and coil input end 231 is all plugged on corresponding with coil output 232
In spliced eye 222.Therefore, when assembly PCB winding 22 is with flatwise coil 23, user only needs to input the coil of flatwise coil 23
End 231 is plugged in the corresponding spliced eye 222 of PCB winding 22 with coil output 232, can quickly complete assembly.
Fig. 5 a is please referred to, Ritz coil windings 24 are Ritz coil windings, and the number of plies of the Ritz coil windings is 2 layers, often
The number of turns of layer Ritz coil windings is 3 circles or 4 circles.
Also referring to Fig. 3 to Fig. 5, the side of the first side wall 211 towards magnetic core column 213 is provided with the first groove 2111,
The side of second sidewall 212 towards magnetic core column 213 is provided with the second groove 2122.
PCB winding 22 includes that the first protrusion 224 and the second protrusion 225, the first protrusion 224 are fastened on the first groove 2111
Interior, the second protrusion 225 is fastened in the second groove 2122.
Therefore, it can quickly be positioned by snap-in structure, PCB winding 22 and the first magnetic core 21 or the second magnetic core 25 and more
Add and firmly assembles together.
When as very more such as the number of plies increase of the traditional technology that background technology part is illustrated, especially primary/secondary coil,
For example, increasing up to 18 layers.Obviously, other than the defect for occurring being illustrated such as background technology part, and actually adding
During work, manufacturing process is put forward higher requirements, causes production efficiency low.
However, when primary/secondary coil can greatly reduce neighbour for example, by using Alpha's coil using flatwise coil
Nearly effect, provides power density.Referring to Fig. 6, flat surface transformer 200 includes 3 PCB winding 22 and 3 flatwise coils 23,
PCB winding 22 is used as secondary coil, and flatwise coil 23 is used as primary coil.Each flatwise coil 23 shares two layers, shares 6
Circle, wherein every layer has 3 circles.Therefore, by selecting flatwise coil, great neighbour is generated relative to 18 layers of winding of traditional technology
Nearly effect, it is clear that flat surface transformer provided in this embodiment can greatly reduce kindred effect.
In the present embodiment, in order to provide the current density of flatwise coil, further improve kelvin effect and kindred effect,
User can choose the flatwise coil coiling of optimal thickness.For example, firstly, determined according to temperature increase requirement and current density hand over/it is straight
Flow impedance ratio FR, for example, according to transformer require allow temperature rise and each transformer structure and dissipating-heat environment come
The determination AC/DC impedance ratio F of selectionR, such as FR=1.5 or other values.Secondly, tabling look-up to obtain Q according to Dowell curve
Value；Again, according to formula:Fl=NlH/ (h+s), calculates the optimal thickness of flatwise coil；Again, it selects optimal
The flatwise coil when flatwise coil of thickness is as assembly, wherein NlFor every layer of the number of turns, s is conductor interlayer spacing distance, FlFor
Layers of copper coefficient, h are the thickness of flatwise coil, and Δ is penetration depth.
It is big for transformer alternating circuit component, F is selected under normal conditionsR=1.5 is best, is confined to manufacturing process certainly
Difficulty and window fill factor, FRValue can also increase, the maximum F that can be chosenRThe temperature rise that value can be born according to the coil
Depending on range.FRIt increases, it, if being lower than 1.5, is more than minimum switch-back point that loss, which becomes larger, is needed with thinner thinner conducting wire, window
Fill factor is reduced.It is tabled look-up by Dowell curve it is found that for example: working as FR=1.5, when the number of plies is 1, Q is about 1.6；The number of plies is 2
When, Q is about 1.1；When the number of plies is 3, Q value is about 0.8；When the number of plies is 10, Q is about 0.4.
Therefore, the utility model embodiment overcomes kelvin effect and kindred effect bring fuel factor, flat by optimizing
The thickness and interlayer spacings size of flat coil, which has optimal AC DC impedance ratio, to substantially increase
Window utilization rate.
Further, by calculating the thickness of optimal flatwise coil, kelvin effect can be improved and face side effect band
The loss for the current cross section product come considerably increases the power of flat surface transformer so that coil be made to possess maximum current density
Volume ratio.
In some embodiments, PCB winding 22 includes M layers of PCB coil, and every layer of PCB coil of M layers of PCB coil can be used as
Primary coil or secondary coil, and in PCB winding, primary coil replace assembly with secondary coil, and M is positive integer, and M >=1.
Referring to Fig. 7, PCB winding 22 includes 9 layers of PCB coil, wherein 3 layers of front PCB coil is used as secondary PCB coil
22a, intermediate 3 layers of PCB coil are used as primary PCB coil 22b, behind 3 layers of PCB coil be used as secondary PCB coil 22c.
Therefore, user can be according to product demand, self manufacture PCB winding, and defines the primary line in each PCB winding
The quantity of circle or secondary coil.
As the another aspect of the utility model embodiment, the utility model embodiment provides a kind of flat surface transformer production
Method.Referring to Fig. 8, flat surface transformer production method 800 includes:
Step 81 provides the first magnetic core, at least one PCB winding, at least one flatwise coil, at least one Ritz coil
Winding and the second magnetic core；
Step 82, according to the number of turns between the primary coil and secondary coil of flat surface transformer, determine at least one PCB around
In group in each PCB winding and/or at least one flatwise coil in each flatwise coil and/or at least one Ritz coil windings
The series-parallel relationship and rigging position relationship of each Ritz coil windings；
Step 83, according to series-parallel relationship and rigging position relationship, will be each in the first magnetic core, at least one PCB winding
Each flatwise coil in PCB winding, at least one flatwise coil, each Ritz coil windings at least one Ritz coil windings
And second magnetic core concentric be assembled into flat surface transformer.
In the present embodiment, wherein user can according to product demand, select two or more PCB winding in each PCB around
In group 22, more than two flatwise coil in each flatwise coil 23 and more than two Ritz coil windings each Ritz coil around
Rigging position relationship between group 24, for example, it can be following rigging position relationship:
1, the first magnetic core-PCB winding-flatwise coil-PCB winding-Ritz coil windings-PCB winding-flatwise coil-PCB
Winding-the second magnetic core of Ritz coil windings --- ---；
2, the first magnetic core-PCB winding-PCB winding-PCB winding-flatwise coil-PCB winding-Ritz coil windings-PCB
The second magnetic core of winding-flatwise coil --- ---；
3, the first magnetic core-PCB winding-flatwise coil-PCB winding-PCB winding-PCB winding-flatwise coil-PCB winding-
The second magnetic core of flatwise coil --- ---；
4, the first magnetic core-flatwise coil-flatwise coil-PCB winding-Ritz coil windings-PCB winding-flatwise coil-
PCB winding-the second magnetic core of flatwise coil --- ---；
5, the first magnetic core-PCB winding-flatwise coil-PCB winding-flatwise coil-flatwise coil-flatwise coil-PCB around
Group-the second magnetic core of Ritz coil windings --- ---；
6, the first magnetic core-Ritz coil windings-Ritz coil windings-PCB winding-Ritz coil windings-PCB winding-is flat
Flat coil-PCB winding-the second magnetic core of flatwise coil --- ---；
7, the first magnetic core-PCB winding-flatwise coil-PCB winding-Ritz coil windings-Ritz coil windings-litz wire
Enclose winding-PCB winding-the second magnetic core of flatwise coil --- ---；
……
In the present embodiment, user can voluntarily determine PCB winding 22, flatwise coil 23 and benefit according to product demand
Hereby coil windings 24 are used as armature winding or secondary windings, such as: whole PCB windings 22 are armature winding, whole flatwise coils
23 and Ritz coil windings 24 be secondary windings；Whole PCB windings 22 are secondary windings, whole flatwise coils 23 and Ritz
Coil windings 24 are armature winding；A part of PCB winding 22 is primary/secondary winding, another part PCB winding 22 be it is secondary/
Armature winding, similarly, a part of flatwise coil 23 is primary/secondary winding, another part flatwise coil 23 be it is secondary/primary around
Group.Similarly, a part of Ritz coil windings 24 are primary/secondary winding, and another part Ritz coil windings 24 are secondary/primary
Winding.
In the present embodiment, user can also be according to product demand, by part/whole PCB winding 22, part/all flat
Flat coil 23 and part/whole Ritz coil windings 24 carry out series/parallel, such as: at least one PCB of series/parallel around
Whole PCB winding 22 in group, whole flatwise coils 22 at least one flatwise coil of series/parallel, series/parallel at least one
Whole Ritz coil windings 24 in the coil windings of Ritz；Alternatively, by least one PCB winding part PCB winding 22 series connection/simultaneously
Join, 22 parallel/series of another part PCB winding, flatwise coil 23 series/parallel in part at least one flatwise coil is another
23 parallel/series of part flatwise coil, litz wire circle winding 24 series/parallel in part at least one Ritz coil windings, separately
A part of 24 parallel/series of Ritz coil windings；Alternatively, by part PCB winding 22 at least one PCB winding, at least one
In flatwise coil in part flatwise coil 23 and at least one Ritz coil windings part litz wire circle winding 24 connect together/
Parallel connection, part litz wire in another part PCB winding 22, another part flatwise coil 23 and another part Ritz coil windings
Enclose the parallel/series together of winding 24.
To sum up, on the one hand, due to using PCB winding, flatwise coil and Ritz coil windings as primary/secondary line
Circle, the two is small in size, therefore, is capable of the volume of reduced plan transformer on the whole.On the other hand, when needing to design big circle
When several primary/secondary coils, since flatwise coil 23 is under relatively small volume, can laterally increase/the number of turns is reduced, because
This, at the beginning of can relatively avoiding the need for assembly multilayer/secondary coil, and then reduce kindred effect and parasitic capacitance, Yi Jiti
High power density and reduction temperature rise.Yet another aspect, user can neatly fill according to series-parallel relationship and rigging position relationship
With PCB winding and flatwise coil, so as to provide the flat surface transformer under volume and after flexible assembly rapidly.
In some embodiments, referring to Fig. 9, step 81 includes:
Step 811 determines AC/DC impedance ratio according to temperature increase requirement and current density；
Step 812, according to Dowell curve, table look-up to obtain Q value；
Step 813, according to formula:Fl=NlH/ (h+s), calculates the optimal thickness of flatwise coil；
Step 814 selects flatwise coil of the flatwise coil of optimal thickness as assembly when.
In the present embodiment, NlFor every layer of the number of turns, s is conductor interlayer spacing distance, FlFor layers of copper coefficient, h is flatwise coil
Thickness, Δ is penetration depth.
It is big for transformer alternating circuit component, F is selected under normal conditionsR=1.5 is best, is confined to manufacturing process certainly
Difficulty and window fill factor, FRValue can also increase, the maximum F that can be chosenRThe temperature rise that value can be born according to the coil
Depending on range.FRIt increases, it, if being lower than 1.5, is more than minimum switch-back point that loss, which becomes larger, is needed with thinner thinner conducting wire, window
Fill factor is reduced.It is tabled look-up by Dowell curve it is found that for example: working as FR=1.5, when the number of plies is 1, Q is about 1.6；The number of plies is 2
When, Q is about 1.1；When the number of plies is 3, Q value is about 0.8；When the number of plies is 10, Q is about 0.4.
Therefore, the utility model embodiment overcomes kelvin effect and kindred effect bring fuel factor, flat by optimizing
The thickness and interlayer spacings size of flat coil, which has optimal AC DC impedance ratio, to substantially increase
Window utilization rate.
Further, by calculating the thickness of optimal flatwise coil, kelvin effect can be improved and face side effect band
The loss for the current cross section product come considerably increases the power of flat surface transformer so that coil be made to possess maximum current density
Volume ratio.
In some embodiments, the number of plies of Alpha's flatwise coil is 2 layers, and the number of turns of every layer of Alpha's flatwise coil is greater than
Or it is equal to 2 circles, for example, the number of turns of every layer of Alpha's flatwise coil is 3 circles.
In some embodiments, PCB winding includes M layers of PCB coil, and every layer of PCB coil of M layers of PCB coil can be used as just
Grade coil or secondary coil, and in PCB winding, primary coil replace assembly with secondary coil, and M is positive integer, and M >=1.
It should be noted that not necessarily there is centainly successive between above steps in above-mentioned each embodiment
Sequentially, those of ordinary skill in the art are appreciated that in different embodiments according to the description of the utility model embodiment, above-mentioned
Each step can have the different sequences that executes, and also i.e., it is possible to execute parallel, can also exchange execution etc..
It should be noted that not in flat surface transformer production method embodiment detailed description technical detail, reference can be made to
Flat surface transformer provided by the utility model embodiment is related to be illustrated.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；
Under the thinking of the utility model, it can also be combined between the technical characteristic in above embodiments or different embodiments,
Step can be realized with random order, and there are many other variations of the different aspect of the utility model as described above, be
Simplicity, they do not provide in details；Although the utility model is described in detail with reference to the foregoing embodiments, this
The those of ordinary skill in field it is understood that it is still possible to modify the technical solutions described in the foregoing embodiments,
Or equivalent replacement of some of the technical features；And these are modified or replaceed, and do not make the sheet of corresponding technical solution
Matter is detached from the range of each embodiment technical solution of the application.
Claims (10)
1. a kind of flat surface transformer, which is characterized in that including the first magnetic core, at least one PCB winding, at least one flat wire
Circle, at least one Ritz coil windings and the second magnetic core, in first magnetic core, at least one described PCB winding each PCB around
Each flatwise coil in group, at least one described flatwise coil, each Ritz coil at least one described Ritz coil windings
Winding and second magnetic core is concentric is assembled into the flat surface transformer.
2. flat surface transformer according to claim 1, which is characterized in that the flat surface transformer includes at least two PCB
Winding, each PCB winding, each flatwise coil, in addition each PCB winding and each Ritz coil around
Group is sequentially assembled.
3. flat surface transformer according to claim 1, which is characterized in that at least one PCB winding described in series/parallel
Whole PCB windings.
4. flat surface transformer according to claim 1, which is characterized in that at least one flatwise coil described in series/parallel
Each Ritz coil windings in middle whole flatwise coil and/or at least one described Ritz coil windings.
5. flat surface transformer according to claim 1, which is characterized in that the flatwise coil includes Alpha's flat wire
Circle.
6. flat surface transformer according to claim 1, which is characterized in that the PCB winding is armature winding, described flat
Coil and/or the Ritz coil windings are secondary windings；Alternatively, the PCB winding is secondary windings, the flatwise coil
And/or the Ritz coil windings are armature winding.
7. flat surface transformer according to any one of claims 1 to 6, which is characterized in that PCB winding includes M layers of PCB line
Circle, every layer of PCB coil of the M layers of PCB coil can be used as primary coil or secondary coil, and in the PCB winding, primary
Coil replaces assembly with secondary coil, and M is positive integer, and M >=1.
8. flat surface transformer according to any one of claims 1 to 6, which is characterized in that first magnetic core or described
Two magnetic cores include pedestal, the first side wall, second sidewall and magnetic core column, and the first side wall is set to pedestal side, and second sidewall is set
It is placed in the pedestal other side, the first side wall is opposite with second sidewall, and magnetic core column is set to the middle part of pedestal.
9. flat surface transformer according to claim 8, which is characterized in that
The side of the first side wall towards the magnetic core column is provided with the first groove, and the second sidewall is towards the magnetic core column
Side be provided with the second groove；
The PCB winding includes the first protrusion and the second protrusion, and first protrusion is fastened in first groove, and described the
Two protrusions are fastened in second groove.
10. a kind of electronic equipment, which is characterized in that including flat surface transformer as described in any one of claim 1 to 9.
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| CN201820576007.1U CN208189365U (en) | 2018-04-19 | 2018-04-19 | A kind of flat surface transformer and electronic equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12027299B2 (en) | 2020-05-07 | 2024-07-02 | Delta Electronics (Shanghai) Co., Ltd | Winding assembly and magnetic element |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12027299B2 (en) | 2020-05-07 | 2024-07-02 | Delta Electronics (Shanghai) Co., Ltd | Winding assembly and magnetic element |
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