CN107204233A - A kind of Large Copacity dry type high frequency high voltage transformer - Google Patents
A kind of Large Copacity dry type high frequency high voltage transformer Download PDFInfo
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- CN107204233A CN107204233A CN201610285249.0A CN201610285249A CN107204233A CN 107204233 A CN107204233 A CN 107204233A CN 201610285249 A CN201610285249 A CN 201610285249A CN 107204233 A CN107204233 A CN 107204233A
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Classifications
-
- 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
- H01F27/24—Magnetic cores
-
- 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
- H01F27/2823—Wires
-
- 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
- H01F27/2876—Cooling
-
- 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
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F19/00—Fixed transformers or mutual inductances of the signal type
- H01F19/04—Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulating Of Coils (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The present invention provides a kind of Large Copacity dry type high frequency high voltage transformer, comprising：EE type magnetic cores, skeleton, coil and fixed support device, also include the extraction copper bar or copper cash of coil, the EE types magnetic core is that two E-type magnetic cores are formed in the relative simultaneously consistency from top to bottom installation of opening, skeleton is sleeved on the center pillar of EE type magnetic cores, coil is vertical structure, combined by low-voltage coil and high-tension coil, it is wound on interlacedly on quadrate framework, there is insulating barrier between adjacent high-tension coil and low-voltage coil, high-tension coil is formed by big stock litz wire coiling, if big stock litz wire is formed by carried interest shallow bid litz wire is stranded, fixed support device includes upper epoxy plate, lower epoxy plate, fagging and pull bar, the EE types magnetic core is seated on lower epoxy plate, coil is seated on fagging, it is lower to be fixedly connected between epoxy plate and fagging, it is connected under upper epoxy plate between epoxy plate by pull bar, the coil it is upper, space between bottom and EE type magnetic cores, which is set, adopts side.
Description
Technical field
The invention belongs to dry-type transformer field, high voltage electric equipment is ranged, a kind of Large Copacity dry type is specifically related to
High frequency high voltage transformer.
Background technology
More or less there are following technical disadvantages in existing conventional transformer, cause existing high frequency high voltage transformer to exist
Transfer capacity is small（Below 10kVA）, booster voltage it is low（Below 1000V）, efficiency it is low（Less than 90%）, can not longtime running and can
By the not high technical deficiency of property.
It is essentially all first coiling low-voltage coil 1. the winding method of conventional transformer is more unified, then high-tension coil
It is wound on outside low-voltage coil.Such a design method is proper in middle low frequency field.But in Large Copacity high frequency transformer field,
This method can bring the phenomenon that increased dramatically of lattice coil loss heating to cause transformer to burn out, this phenomenon mainly due to
The kindred effect of high frequency magnetic field lower conductor is produced.
2. because transformer is in assembling, coil is in vertical state, in strong transportation, end turn
Inanition is likely to cause wire movement, further results in the failure of coil cross-layer.
3. due to multiple conducting wires in coil and be wound on same layer, the coil of vertical structure under gravity, multiple conducting wires
Can occur falling phenomenon, coil may be damaged when serious.
4. the air channel of conventional transformer uses " " font stay as airway support, with heater members formation face with
The contact in face, area of dissipation is smaller, and radiating effect is poor.
5. conventional high frequency transformer, usually coil are directly wound on magnetic core center pillar, only by exhausted between magnetic core and coil
Edge paper is isolated, and in high-frequency high-power field, this method can not ensure enough dielectric strengths and structural strength, and can cause to hit
Wear and cause coil to cause failure to magnetic core electric discharge.
6. the coil in generally conventional transformer with magnetic core by being fixed, coil is directly anchored on magnetic core.Due to
Magnetic core is ferrite material, belongs to frangible component, if directly coil is fixed on magnetic core, is likely to result in the breakage of magnetic core
And crack.
7. and conventional litz wire does not reach the thorough insulation between root and root substantially, and stranded mode is coarse, stranded half
Footpath is inconsistent cause resistance value variations it is excessive, without carrying out special outsourcing imines film, it is impossible to ensure turn-to-turn under high-frequency and high-voltage
Insulating properties, punch-through happens occasionally.
8. in conventional transformer, insulating barrier is used as insulating barrier paper using single polyester film or cable.But it is high in high frequency
In pressure transformer, due to the presence of high frequency spikes voltage and strong parasitic capacitance, or interlayer is caused to produce high parasitism electricity
Pressure difference, this stray voltage peak value could possibly be higher than more than 10 times of normal voltage, and the breakdown fault of transformer can be caused easily.For this
The dielectric strength of layer insulation and anti-dielectric properties must be greatly improved.
9. the layer insulation flood in conventional transformer is integrally wrapped, proper so in conventional transformer；But in height
In frequency power transformer, this design can cause coil width to increase to thickness, the magnetic field hinge degree reduction between coil, cause impedance
Rise, output performance reduction reactive power increase also reduce the delivery efficiency of transformer.
In summary, because conventional transformer more or less has above technical disadvantages, existing high-frequency and high-voltage is caused
Transformer has that transfer capacity is small, booster voltage is low, efficiency is low, can not longtime running and the not high technical deficiency of reliability.With
The development in medium-high frequency field and the demand to high-frequency and high-voltage power supply, Large Copacity high frequency high voltage transformer turns into the skill for being badly in need of breaking through
Art, the structure type of this transformer is dry type, can be had the following characteristics that：Can Large Copacity output（More than 100kVA）, high electricity
Pressure output（More than 10000V）, delivery efficiency it is high（More than 98%）, working frequency it is high（2k~100kHz）Can Large Copacity it is long-term not between
Disconnected operation, small in volume（Volume weight reduction by more than 50%）, low-loss heating（Caloric value is less than the 1% of capacity）Spy
Point, it is therefore desirable to have a kind of Large Copacity dry type high frequency high voltage transformer, it can overcome above technical deficiency, make high-frequency and high-voltage
Power supply can also realize Large Copacity High voltage output, high efficiency export, can run without interruption for a long time, small in volume, low-loss hair
The excellent properties of heat, to meet the demand of modern transformation, enable the use of high-frequency and high-voltage power supply more extensively and reliable.
The content of the invention
It is an object of the invention to provide a kind of Large Copacity dry type high frequency high voltage transformer, for solving current high-frequency and high-voltage neck
Domain exist transfer capacity it is small, booster voltage is low, efficiency is low, can not longtime running and the not high performance deficiency of reliability so that
Enable the use of high-frequency and high-voltage power supply more extensively and reliable；High-frequency and high-voltage power supply is set also to realize Large Copacity High voltage output, height
Efficiency is exported, can run without interruption for a long time, small in volume, the excellent properties of low-loss heating.
Realizing the technical scheme of the object of the invention is：A kind of Large Copacity dry type high frequency high voltage transformer, comprising：EE type magnetic
Core, quadrate framework, square coil and fixed support device, extraction copper bar or copper cash also comprising coil, it is characterised in that：It is described
EE types magnetic core is that two E-type magnetic cores are formed in the relative simultaneously consistency from top to bottom installation of opening, and the quadrate framework is sleeved on EE type magnetic cores
Center pillar on, the square coil be vertical structure, combined and be wound on quadrate framework by low-voltage coil and high-tension coil, it is described
Axially radiating air flue is set in square coil；The high-tension coil and low-voltage coil are interlaced coiling on quadrate framework；
There is the first insulating barrier between adjacent high-tension coil and low-voltage coil；
The high-tension coil is formed by big stock litz wire coiling, and whole continuous wrapping multilayer second is exhausted outside the big stock litz wire
Edge layer, if the big stock litz wire is formed by carried interest shallow bid litz wire is stranded, the shallow bid litz wire is by some high conductivities
Copper cash it is stranded form, the 3rd insulating barrier of outside cladding of every copper cash；
The low-voltage coil is formed by highly conductive copper foil continuous coiling, by the 4th insulator separation between the copper foil of adjacent layer；
The fixed support device includes upper epoxy plate, lower epoxy plate, fagging and pull bar, and the EE types magnetic core is seated in lower epoxy
On plate, the square coil is seated on fagging, is fixedly connected between the lower epoxy plate and fagging, the upper epoxy plate, under
It is connected between epoxy plate by pull bar；The space of the upper and lower end of square coil sets and adopts side, i.e., filled out with insulating materials
Fill.
In order to reach superior technique effect, technical scheme can also be specially following technical characterstic：
1. described in adopt side be that insulation filling is carried out to the space of the upper and lower end of coil using T1 type insulating electrical cardboards, it is described
T1 type insulating electrical cardboards are laid in square coil end, and are bonded in end turn using insulative glue, laminate layer by layer, with side
Shape coil firmly forms one, and its edge portion is flushed with skeleton end, interior edge and conductive contact.
2. described in quadrate framework and EE type magnetic cores center pillar between gap be filled fixation, filler is insulation board.
3. described in the first insulating barrier be compound interleave insulating barrier, including at least different exhausted of two kinds of imines film and DMD paper
Edge medium, the dielectric uses for multi-layer intercrossed stacking, and two layers adjacent of dielectric is unlike material.
4. described in the second dielectric be thickness between 0.025-0.05mm imines film.
5. described in the 3rd insulating barrier be high intensity acetal insulated paint overlay.
6. described in the 4th insulating barrier be insulating paper or dielectric film.
7. described in insulating materials be laid in square coil end, and end turn, layer stackup are bonded in using insulative glue
Pressure, one is firmly formed with square coil, and its edge portion is flushed with skeleton end, interior edge and conductive contact.
8. described in the axial turn-to-turn of square coil of transformer bundled by electrician leukorrhea, the every layer big dividend of the square coil
Hereby electrician leukorrhea is laid by the lower floor of line, and the electrician leukorrhea is laid on four corners of square coil, every layer big stock litz wire
Per coiling to 1/4 around it is long when, will the electrician leukorrhea grow part reverse drawing to pushing down drawing below follow-up stock litz wire greatly
Tightly, the big stock litz wire of square coil carries out axial binding.
9. described in square coil by glass epoxy silk cast form, the class of insulation be H grades or higher, square coil
Heatproof should be not less than 180 DEG C.
10. described in square coil overall vacuum dipping F class B insulation paints.
11. described in square coil appearance wrap F grades of overlay film extrusion coating papers.
12. described in the thickness of copper foil be preferably 0.2mm ~ 1mm, preferably no more than 0.8mm.
13. described in big stock litz wire formed by 5-19 root shallow bid litz wires are stranded.
14. further, the shallow bid litz wire in the big stock litz wire is formed by a constant pitch is stranded.
15. further, the twisting pitch of the shallow bid litz wire in the big stock litz wire is 20-45mm.
16. described in shallow bid litz wire be twisted into by 5-19 root copper cash.
17. further, the copper cash in the shallow bid litz wire is formed by a constant pitch is stranded.
18. further, the twisting pitch of the copper cash in the shallow bid litz wire is 10-45mm.
19. described in gas channel supporting bar cross section be I-shaped.
20. described in the first insulating barrier by the way of graded insulation, the interlayer of adjacent high-tension coil and low-voltage coil
Insulation is divided into N grade, and N is natural number, each class B insulation using different isolation materials, the 1st layer conductor coiling to 1/N around it is long when
Wait and stop coiling, the 1st grade of 1/N insulation of wrapping；Further around the 2nd section of 1/N layer line of system, the 2nd grade of 1/N insulation of wrapping；By that analogy, finally
Coiling n-th 1/N layer lines, wrapping N class B insulations.
21. further, described N values are 2-8.
22. described in high-tension coil in square coil and low-voltage coil using staggeredly winding method, a layer line circle around
If it is divided into stem portion long, first a part of low-voltage coil of coiling, further around a part of high-tension coil, further around a part of low-voltage coil ...
Up to a layer line circle is finished around long whole coilings.
23. a layer line circle further, is divided into M deciles around long, M values are preferably between 2-8.
There is advantages below using the Large Copacity dry type high frequency high voltage transformer of technical solution of the present invention：
1. high-frequency and high-voltage power supply is also realized that Large Copacity, high voltage are exported, high efficiency is exported, can run without interruption for a long time, body
The small lightweight, high-frequency of product, the excellent properties of low-loss heating.
2. using the litz wire of particular design：Kelvin effect that electric current is caused under high frequency magnetic field can be eliminated well and neighbouring
The serious A.C.power loss that effect is brought, effectively reduction transformer temperature rise.
3. continuously wrapping 4 layers of δ 0.025 imines film outside the litz wire of big stock, it can effectively prevent the sensing of turn-to-turn from hitting
Wear；Slippery layer, is not particularly suitable for dry-type transformer.
4. all thoroughly insulation between all copper cash roots and root in litz wire, it is ensured that the efficient profit of copper cash ampacity
With.
5. litz wire spectral range is wide：Suitable for 2k~100kHz.
6. in the transformer of the present invention, the first insulating barrier between adjacent high-tension coil and low-voltage coil, the first insulation
Layer uses imines film（220 DEG C of C class B insulations, heatproof）Interlock with DMD paper and use, performance that its is pressure-resistant is not only higher than both
And value, and with excellent dielectric properties, can effectively prevent the breakdown fault that stray voltage is caused；Ensure that reliable high frequency is exhausted
Edge level.
7. in the transformer of the present invention, square coil is by the way of graded insulation, and during coiling lattice coil, the number of plies is got over
Many, reduction layer insulation number is more, square coil width to thinner, not only can guarantee that dielectric strength, reduce square coil
Width to thickness, reduce winding volume, it is ensured that the excellent output characteristics of transformer, reduction impedance, reduce leakage magnetic flux and idle disappear
Consumption, and layer insulation number can be reduced.
8. insulation filling is carried out using insulating electrical cardboard square shaped end turn and the phenolic resin glue side of being bonded in is used
Shape end turn, is laminated layer by layer, and one is firmly formed with square coil, and in follow-up paint-dipping process, can be preferably attached to
Coil inside, square shaped coil integrally plays support fixation, wire is not fallen the layer that collapses, and can prevent end from climbing electricity and making
Puncture into end.
9. described in the axial turn-to-turn of square coil of transformer bundled by electrician leukorrhea, the every layer big stock of the square coil
The lower floor laying electrician leukorrhea of litz wire, the electrician leukorrhea is laid on four corners of square coil, and every layer big dividend is hereby
Line per coiling to 1/4 around it is long when, will the electrician leukorrhea grow part reverse drawing to pushing down below follow-up stock litz wire greatly
Tense, the big stock litz wire of square shaped coil carries out axial binding；It is right and axial electrician leukorrhea repeatedly staggeredly interspersed can compress
The big stock litz wire of flood can play a part of axially binding.This axially can be well between square coil, circle and the circle of binding
Fasten and reduce gap, fixed in high-frequency electromagnetic stress bottom offset space, can effectively reduce noise during operation.
10. the difference in axial heat transmission gas road is there is provided a kind of gas channel supporting bar of I-shaped in the present invention, its
" work " literal contact square coil conductive surface, forms contact of the point with face, and the area so contacted with conductor can be much smaller than normal
" " font stay of rule, area of dissipation is bigger, and radiating effect is more preferable.
11. in the present invention, by the way of high-tension coil and low-voltage coil interlock coiling, in no increase square coil width
In the case of thickness, the magnetic field hinge degree of square coil in high frequency can be improved well, height is reduced to greatest extent
Frequency added losses, while reducing leakage magnetic flux, improve delivery efficiency（Efficiency can reach more than 98%）.
12. the multilayer electrical isolation in the present invention between square coil and magnetic core：Square coil is not about on magnetic core, but
First it is wound on quadrate framework, and before coiling, quadrate framework surface wrapping multilayer DMD insulating barriers, to improve insulation.Remove
Outside this, quadrate framework is packed into after square coil, and 6mm air insulation clearance is also possessed between quadrate framework and magnetic core, and this three
The voltage endurance capability of the measure of kind is entirely capable of isolating out discharge breakdown phenomenon of the square coil to magnetic core, and can guarantee that enough structures are strong
Degree.
13. the fixed support of square coil：In the present invention, on supporting way, using fagging, make square coil and magnetic core
Isolation, its weight is shared on fagging, magnetic core does not undertake the gravity of square coil, fagging undertakes the weight of square coil completely
Power, fagging falls within insulating device in itself.This design method not only ensure that the fixation of square coil, and assembling mode is simple
Reliably.
Brief description of the drawings：
Accompanying drawing 1 is the overall schematic of the Large Copacity dry type high frequency high voltage transformer of the present invention
Accompanying drawing 2 is the front view of the Large Copacity dry type high frequency high voltage transformer of the present invention
Accompanying drawing 3 is the left view of the Large Copacity dry type high frequency high voltage transformer of the present invention
Accompanying drawing 4 is the top view of the Large Copacity dry type high frequency high voltage transformer of the present invention
Accompanying drawing 5 is the front view of the EE type magnetic cores of the Large Copacity dry type high frequency high voltage transformer of the present invention
Accompanying drawing 6 is the front view of the quadrate framework of the Large Copacity dry type high frequency high voltage transformer of the present invention
Accompanying drawing 7 is the graded insulation schematic diagram of the square coil of the Large Copacity dry type high frequency high voltage transformer of the present invention
Accompanying drawing 8 is that side schematic diagram is adopted in the square coil end of the Large Copacity dry type high frequency high voltage transformer of the present invention
Accompanying drawing 9 is the axial turn-to-turn fastening schematic diagram of the square coil of the Large Copacity dry type high frequency high voltage transformer of the present invention
Accompanying drawing 10 is the air flue and its support schematic diagram of the square coil of the Large Copacity dry type high frequency high voltage transformer of the present invention
Accompanying drawing 11 is the big stock litz wire schematic diagram of the high-tension coil of the Large Copacity dry type high frequency high voltage transformer of the present invention.
Accompanying drawing 12 is the vertical section schematic diagram of the square coil of the Large Copacity dry type high frequency high voltage transformer of the present invention.
Accompanying drawing 13 is that the multilayer between the square coil and magnetic core of the Large Copacity dry type high frequency high voltage transformer of the present invention is electric
Isolate schematic diagram.
In figure, 1 be Large Copacity dry type high frequency high voltage transformer, 2 be EE types magnetic core, 3 be quadrate framework, 4 be square coil,
5 be radiating air flue, 6 be fixed support device, 7 be the extraction copper bar or copper cash of coil, 8 be gas channel supporting bar, 10 be big dividend hereby
Line, 11 be shallow bid litz wire, and 12 be copper cash, and 13 is adopt side, and 21 be E-type magnetic core, and 22 be bottom yoke, and 23 be center pillar, and 24 be other post, 41
It is high-tension coil for low-voltage coil, 42,43 be electrician leukorrhea；61 it is upper epoxy plate, 62 is lower epoxy plate, 63 is fagging, and 64 are
Pull bar, 91 be the first insulating barrier；92 be the second insulating barrier, and 93 be the 3rd insulating barrier, and 101 be the 5th insulating barrier, and 102 be air
Separation layer.
Embodiment：
It is high to the Large Copacity dry type high frequency of the present invention below in conjunction with accompanying drawing 1-13 in order to better illustrate technical scheme
One embodiment of pressure transformer is described in detail.
Embodiment one：
As shown in accompanying drawing 1-13, Large Copacity dry type high frequency high voltage transformer 1 of the invention, comprising：EE types magnetic core 2, quadrate framework
3rd, square coil 4, fixed support device 6, extraction copper bar or copper cash 7 also comprising coil.As shown in figure 5, the EE types magnetic core
2 be that two E-type magnetic cores 21 are formed in the relative simultaneously consistency from top to bottom installation of opening, and each E-type magnetic core 21 is by bottom yoke 22, center pillar 23 and two
Individual other post 24 is constituted, and closed magnetic circuit is formed between upper and lower two bottom yokes 22, center pillar 23 and the other post 24 of the EE types magnetic core.
The quadrate framework 3 is sleeved on the center pillar 24 of EE types magnetic core 2, and the square coil 4 is vertical structure, by low pressure
Coil 41 and the combination of high-tension coil 42 are wound on quadrate framework 3, and axially radiating air flue 5, radiating are set in the square coil 4
Gas channel supporting bar 8 is set in air flue 5, and the cross section of the gas channel supporting bar 8 is I-shaped；The high-tension coil 42 and low-voltage coil
It is interlaced coiling on quadrate framework；There is the first insulating barrier 91 between adjacent high-tension coil and low-voltage coil 41；Institute
High-tension coil 42 is stated to form as wire coiling using big stock litz wire 10.As shown in figure 11, the outside of big stock litz wire 10
Whole the second insulating barrier of continuous wrapping multilayer 92, if the big stock litz wire 10 is formed by carried interest shallow bid litz wire 11 is stranded, institute
State shallow bid litz wire 11 by some high conductivities copper cash 12 it is stranded form, the 3rd insulating barrier of outside cladding of every copper cash 12
93；
The low-voltage coil 41 is formed using highly conductive copper foil as wire continuous coiling, exhausted by the 4th between adjacent copper foil
Edge layer is isolated；
As Figure 1-4, the fixed support device 6 includes upper epoxy plate 61, lower epoxy plate 62, fagging 63 and pull bar 64, institute
State EE types magnetic core 2 to be seated on lower epoxy plate, the square coil is seated on fagging, it is solid between the lower epoxy plate and fagging
Fixed connection, is connected between the upper epoxy plate 61, lower epoxy plate 62 by pull bar 64.
The winding method of conventional transformer more unify, be essentially all first coiling low-voltage coil, then high-tension coil around
System is outside low-voltage coil.Such a design method is proper in middle low frequency field.But in Large Copacity high frequency transformer field, this
The phenomenon that the method for kind can bring lattice coil loss heating increased dramatically causes transformer to burn out, and this phenomenon is mainly due to height
The kindred effect of frequency magnetic field lower conductor is produced.
In order to overcome above-mentioned deficiency, as shown in figure 8, in the present invention, employing a kind of special high-tension coil and low-voltage line
Enclose the winding method that interlocks.It is specifically described as：If a layer line circle is divided into stem portion, first a part of low-voltage coil of coiling around length
41st, further around a part of high-tension coil 42, further around a part of low-voltage coil 41 ... up to a layer line circle is complete around long whole coilings
Finish.Such as it is divided into M deciles, it is preferably 4 in 2-8, the present embodiment that M values, which are preferably,.The low-voltage coil 41 of first 1/4 layer of coiling,
High-tension coil 42 further around 1/4, further around 1/4 layer of low-voltage coil 41 ... until the whole coilings of coil are finished.Such a design
It is advantageous in that：In the case where no increase coil width is to thickness, staggeredly coiling high-voltage coil and low-voltage coil, coil can be improved well and existed
Magnetic field hinge degree under high frequency, reduces high frequency added losses to greatest extent, while reducing leakage magnetic flux, improves output
Efficiency（Efficiency can reach more than 98%）.
For superior technique effect, in the present embodiment, respectively between overhang, quadrate framework and EE type magnetic cores
The axial turn-to-turn of the coil in gap and transformer be filled or bundle respectively reinforcing.
Firstly, since transformer is in assembling, square coil is in vertical state, square in strong transportation
The inanition of end turn is likely to cause wire movement, further results in the failure of cross-layer.Therefore, present invention employs a kind of T1
Type insulating electrical cardboard has carried out insulation filling to end turn, is described as adopting side.As shown in figure 8, the square coil 4
Space between upper and lower end and EE types magnetic core 2, which is set, adopts side 13, and the side 13 of adopting is to line using T1 type insulating electrical cardboards
The space of the upper and lower end of circle carries out insulation filling, and the T1 types insulating electrical cardboard is laid in end turn, its edge portion with
Skeleton end is flushed, interior edge and conductive contact, under raised state, is adopted side and has been supported wire, then wire will not fall and collapse
Layer.And end turn is bonded in using phenolic resin glue, laminate layer by layer, one is firmly formed with coil, and in follow-up dipping lacquer work
In skill, coil inside can be preferably attached to, support fixation is integrally played to coil.Other insulative glues can also be used
It is bonded.
Second, the gap between the center pillar of quadrate framework and EE the type magnetic core is also filled fixation, i.e., using insulation
The filling of insulating epoxy plate is filled in the gap that epoxy plate is filled between quadrate framework and magnetic core, the gap in two faces, with the side of preventing
Shape skeleton is rocked, and realizes the fixation between quadrate framework and magnetic core.
3rd, due to multiple conducting wires in the coil of vertical structure and same layer is wound on, under gravity, multiple conducting wires meeting
Generation falling phenomenon, may damage coil when serious, therefore, and the axial turn-to-turn of coil progress is mutually bundled in the present invention is tight
Gu mode, prevents the displacement of wire.As shown in figure 9, the axial turn-to-turn of the coil of the transformer is bundled by electrician leukorrhea 43, it is described
The lower floor laying electrician leukorrhea of the big stock litz wire of every layer of coil 4, the electrician leukorrhea is laid on four corners of coil, often
The big stock litz wire of layer per coiling to 1/4 around it is long when, will the electrician leukorrhea grow part reverse drawing to follow-up stock litz wire greatly
Lower section push down tension, the big stock litz wire of square shaped coil carries out axial binding and axial electrician leukorrhea can staggeredly wear repeatedly
Insert and compress, axially binding can be played a part of to the big stock litz wire of flood.This axially can be very between coil, circle and the circle of binding
Good fastening and reduce gap, fixed in high-frequency electromagnetic stress bottom offset space, can effectively reduce noise during operation.
For superior technique effect, in the present embodiment, between adjacent high-tension coil 42 and low-voltage coil 41
The insulation mode that first insulating barrier is classified preferably by alternation sum, specially following technical characteristic：
1. described in the first insulating barrier 91 be compound interleave insulating barrier, including at least the two kinds of different insulation of imines film and DMD paper
Medium, the dielectric uses for multi-layer intercrossed stacking, and two layers adjacent of dielectric is unlike material.
2. described in the first insulating barrier by the way of graded insulation, i.e., the interlayer of adjacent high-tension coil and low-voltage coil
Insulation is divided into N grades, and N is preferably 2-8 natural number, and each class B insulation uses different isolation materials, in the 1st layer conductor coiling to 1/
N around it is long when stop coiling, wrapping the 1st grade of 1/N insulation；Further around the 2nd section of 1/N layer line of system, the 2nd grade of 1/N insulation of wrapping；With this
Analogize, last coiling n-th 1/N layer lines, wrapping N class B insulations.
3. in the present embodiment, N is 4, as shown in fig. 7, being specifically described as：1st layer conductor coiling to 1/4 around it is long when stop
Only coiling, the 1st grade of 1/4 insulation of wrapping；Further around the 2nd section of 1/4 layer line of system, the 2nd grade of 1/4 insulation of wrapping；Further around system the 3rd 1/4 layer
Line, wrapping 3rd level insulation；Further around the 4th 1/4 layer line of system, finally wrap the 4th class B insulation.Feature according to this, if coiling multilayer wire
Circle, relative to not graded insulation, the corresponding relation that graded insulation can reduce layer insulation number is as shown in table 1.（The present embodiment
In, layer insulation paper number is 8）：
As can be seen here：Number is more for the number of plies more, less layer insulation, coil width to thinner, volume is also smaller；It is this around
The advantage of mode processed is：Dielectric strength is not only can guarantee that, the width of coil is reduced to thickness, it is ensured that the excellent output of transformer
Characteristic, reduction impedance, reduction leakage magnetic flux and reactive power consumption.
For superior technique effect, high-tension coil 42 described in the present embodiment is formed by big stock litz wire coiling 10, institute
State the litz wire that litz wire 10 is particular design.As shown in figure 11, the litz wire 10 has following technical characteristic：
1. described in big stock litz wire 10 formed by 5-19 root shallow bids litz wire 11 is stranded, the shallow bid Ritz in the big stock litz wire
Line 11 is that set a distance is stranded, and twisting pitch is 20-45mm；In the present embodiment, preferably every 10 shallow bid progress spacing is stranded, pitch
For 35mm.
2. described in big stock litz wire 10 whole of outside the second insulating barrier of continuous wrapping multilayer 92.
3. described in the second dielectric be thickness between 0.025-0.05mm imines film.
4. described in the second dielectric whole continuous wrapping number of plies outside big stock litz wire can be 2-8 layers.This implementation
The wrapping number of plies in example is preferably 4 layers.
5. described in shallow bid litz wire be twisted into by 5-19 root copper cash, the copper cash in shallow bid litz wire be set a distance it is stranded, twist
Conjunction pitch is 10-45mm；In the present embodiment, preferably every 7 copper cash progress spacing is stranded, is carried out every 25mm once stranded.
The litz wire used in the present invention, major advantage is：
1. it is stranded per a small gangs of all set a distance, carried out every 25mm once stranded；It is this it is stranded can prevent completely inside wire from
The high frequency eddy current losses of body；And the stranded diameter of spacing is consistent, ensure each wire error in length ﹤ 1%.
2. 10 shallow bids carry out that spacing is stranded, and pitch is 35mm, this stranded to prevent the neighbour between wire root and root completely
Nearly effect loss；And the stranded diameter of spacing is consistent, ensure each wire error in length ﹤ 1%.
3. 4 layers of δ 0.025 imines film is continuously wrapped outside whole wire（Second insulating barrier）, can effectively prevent turn-to-turn
Sensing puncture.
4. the wrapping of outer layer imines film is firm, and slippery layer, is not particularly suitable for such dry-type transformer.
5. all thoroughly insulation between root, it is ensured that the efficient utilization of copper cash ampacity.
Spectral range is wide：Suitable for 2k~100kHz.
This litz wire can eliminate cause the kelvin effect and kindred effect of electric current to bring under high frequency magnetic field tight well
Weight A.C.power loss, effectively reduction transformer temperature rise.By taking frequency f=4000Hz as an example, now skin depth Δ is 1.21mm, if choosing
It is φ 0.27 with solid conductor, much smaller than 2 Δs, solid conductor has good high frequency performance in itself.
For superior technique effect, in the present embodiment, low-voltage coil by conductance copper foil coiling, preferably by with
Lower technical characteristic：
1. described in copper foil use<T2 is led>High conductivity copper material, conductance >=99.9%, usual thickness are 0.2mm ~ 1mm, this implementation
The thickness of copper foil is preferably no more than 0.8mm in example.
2. copper foil width takes customization, width range is between 100mm ~ 500mm.
3. during coiling low-voltage coil, copper foil takes uninterrupted continuous coiling, is subject to the 4th insulator separation between layers,
4th insulating barrier can use insulating paper, dielectric film or other dielectrics.
4. the copper foil used in this invention, not only conductance is high, and it is mainly characterized by very thin thickness, only typical transformer
The general left and right of copper foil, its thickness is less than the 1/2 of skin depth, and such a design is avoided that kelvin effect, reduction added losses, and
Coiling is simple, and coil flat appearance is attractive in appearance.This copper foil has extremely wide frequency spectrum usage range, it is adaptable to 1k~100kHz electric current
Conduction.
The air channel of conventional transformer uses " " font stay as airway support, with heater members formation face and face
Contact, area of dissipation is smaller, and radiating effect is poor.
For superior technique effect, as shown in Figure 10, in the present embodiment, axle is provided with the square coil of vertical structure
To radiating air flue 5, the inside of radiating air flue 5 is used as airway support using I-shaped gas channel supporting bar 8.The I-shaped air flue support
The cross section of bar 8 is I-shaped, and its " work " literal contact coil conductive surface forms contact of the point with face, so and conductor
The area of contact can be much smaller than " " font stay, and area of dissipation is bigger, and radiating effect is more preferable.It is aided with the axial direction of radiator fan
Wind, cold wind can enter inside the wire and magnetic core of inside transformer heating, and heat is taken away, and reduce transformer temperature rise.
For superior technique effect, in the present embodiment, square coil preferably by following technical characteristic,
1. described in square coil by glass epoxy silk cast form, the class of insulation be H grades or higher, the heatproof of square coil
180 DEG C should be not less than.
2. described in square coil overall vacuum dipping F class B insulation paints.
3. described in square coil appearance wrap F grades of overlay film extrusion coating papers.
Conventional high frequency transformer, usually coil are directly wound on magnetic core center pillar, only by insulation between magnetic core and coil
Paper is isolated, and in high-frequency high-power field, this method can not ensure enough dielectric strengths and structural strength, and can cause punch through
Coil is caused to cause failure to magnetic core electric discharge.
For superior technique effect, a kind of measure for strengthening electrical isolation is employed in the present invention, as shown in figure 13.Tool
Body is described as：Square coil is not about on magnetic core, but is first wound on quadrate framework, and before coiling, quadrate
Frame surface is wrapped in the insulating barrier of multilayer the 5th, the present embodiment, and the 5th insulating barrier is DMD insulating barriers, to improve insulation.It is square
Skeleton also improves insulating properties in itself；In addition, quadrate framework is packed into after coil, is also possessed between quadrate framework and magnetic core
6mm air insulation clearance is entirely capable of isolating out square coil pair as air barrier 102, the voltage endurance capability of this three kinds of measures
The discharge breakdown phenomenon of magnetic core, and can guarantee that enough structural strengths.
Quadrate framework provides mould for the coiling of square coil and fixed.Quadrate framework is a kind of high-strength insulating material in itself
Material, is formed, H grades of the class of insulation, 180 DEG C of heatproof by glass epoxy silk cast drying.It can be fixed on coil winding machine, with coiling
Machine rotates coaxially carry out coil winding.In this invention, skeleton is applied not only to coil winding, insulating device, and fortune can be also born very well
Stress during row on coil, prevent winding deformation, reduce flexible vibrations of the coil under electromagnetic force, reducing noise.
Coil in generally conventional transformer with magnetic core by being fixed, and coil is directly anchored on magnetic core.Due to magnetic
Core be ferrite material, belong to frangible component, if directly coil is fixed on magnetic core, be likely to result in magnetic core breakage with
Crack.
Supporting way is fixed to employ a kind of special coil in this invention, is specifically described as：As Figure 1-4, institute
State fixed support device 6 and include upper epoxy plate 61, lower epoxy plate 62, fagging 63 and pull bar 64, the EE types magnetic core 2 is seated in down
On epoxy plate, the square coil is seated on fagging, is fixedly connected between the lower epoxy plate and fagging, the upper epoxy plate
61st, it is connected between lower epoxy plate 62 by pull bar 64.Insulation tube, or pull bar are arranged outside the pull bar in itself using insulation
Material is made.
In above-mentioned fixed supporting way, square coil is isolated with magnetic core using the fagging 63 of setting, by square coil
Weight is shared on the fagging 63 specially set, and magnetic core does not undertake the gravity of square coil, and fagging 63 undertakes square coil completely
Gravity, fagging 63 falls within insulating device in itself.This design method not only ensure that the fixation of square coil, and assembling side
Formula is simple and reliable.
Simple introduction uses the assemble sequence of the Large Copacity dry type high frequency high voltage transformer of technical solution of the present invention below：
1. first lower epoxy plate and fagging are fixed, connected under lock and key with bolt.
2. bottom magnetic core is placed on lower epoxy plate, notices that placement location is placed in the middle.
3. square coil is packed into magnetic core, notes packing between two parties, and square coil bottom should be propped up by fagging, fagging
To contact firm with square coil bottom.
4. first half magnetic core is packed into square coil, and the gap progress insulation filling between quadrate framework and magnetic core is solid
It is fixed, prevent coil from rocking.
5. epoxy plate will be locked up and down with pull bar, notice that pull bar is entangled with insulation tube, prevent coil from discharging pull bar.
The special feature of the present invention is described as：Realize the Large Copacity of transformer simultaneously at high frequencies, it is high voltage, low
The characteristic of loss, high efficiency and longtime running.Therefore, having selected the material by particular design and technical requirements to carry out, improve
While many technique, innovative interlock coiling, graded insulation, MULTILAYER COMPOSITE of high-low pressure of having invented interlock insulation, coil axle
To fastening, the innovative point of multilayer electrical isolation.
The present invention is not limited to this classification transformer of all of the above characteristic, for it is some different when require have this hair
The performance characteristics being previously mentioned in bright, the present invention is also included.
The innovative point that the present invention is included is not limited to overall object performance, and it is special that it equally invents itself comprising this classification
Some design methods, combination, art inventions, manufacture skill, the key element such as material specification.
The Large Copacity dry type high frequency high voltage transformer of the present invention, can be applied to medium-high frequency power boost, power equipment experiment
The fields such as maintenance, medicine equipment, electrostatic precipitation, high-frequency induction heating, ozone generation, scientific research.
Claims (10)
1. a kind of Large Copacity dry type high frequency high voltage transformer（1）, comprising：EE type magnetic cores（2）, quadrate framework（3）, square coil
（4）And fixed support device（6）, extraction copper bar or copper cash also comprising coil（7）, it is characterised in that：The EE types magnetic core（2）
For two E-type magnetic cores（21）Install and form in the relative simultaneously consistency from top to bottom of opening, the quadrate framework（3）It is sleeved on EE type magnetic cores
（2）Center pillar on, the square coil（4）For vertical structure, by low-voltage coil（41）And high-tension coil（42）Combination is wound on
Quadrate framework（3）On, the square coil（4）Middle setting axial direction radiating air flue（5）；The high-tension coil（42）And low-voltage coil
In quadrate framework（3）Upper is interlaced coiling；Adjacent high-tension coil（42）And low-voltage coil（41）Between have it is first exhausted
Edge layer（91）；
The high-tension coil is by big stock litz wire（10）Coiling is formed, the big stock litz wire（10）The continuous wrapping in whole of outside is more
The second insulating barrier of layer（92）, the big stock litz wire（10）If by carried interest shallow bid litz wire（11）It is stranded to form, the small dividend
Hereby line（11）By the copper cash of some high conductivities（12）It is stranded to form, every copper cash（12）The 3rd insulating barrier of outside cladding
（93）；
The low-voltage coil（41）Formed by highly conductive copper foil continuous coiling, between the copper foil of adjacent layer by the 4th insulating barrier every
From；
The fixed support device（6）Include upper epoxy plate（61）, lower epoxy plate（62）, fagging（63）And pull bar（64）, it is described
EE type magnetic cores（2）It is seated in lower epoxy plate（62）On, the square coil（4）It is seated in fagging（63）On, the lower epoxy plate
（62）With fagging（63）Between be fixedly connected, the upper epoxy plate（61）, lower epoxy plate（62）Between by pull bar（64）Connection is solid
It is fixed；
The square coil（4）The space of upper and lower end sets and adopts side（13）（Filled with insulating materials）.
2. Large Copacity dry type high frequency high voltage transformer as claimed in claim 1, it is characterised in that：It is described to adopt side（13）Using T1
The space of the upper and lower end of type insulating electrical cardboard square shaped coil carries out insulation filling, the T1 types insulating electrical cardboard tiling
End turn is bonded in square coil end, and using insulative glue, laminates layer by layer, one is firmly formed with square coil,
Its edge portion is flushed with skeleton end, interior edge and conductive contact.
3. Large Copacity dry type high frequency high voltage transformer as claimed in claim 1, it is characterised in that：First insulating barrier（91）
For compound interleave insulating barrier, including at least two kinds of different dielectrics of imines film and DMD paper, the dielectric is multilayer
Intersecting is used, and two layers adjacent of dielectric is unlike material.
4. Large Copacity dry type high frequency high voltage transformer as claimed in claim 1, it is characterised in that：The square line of the transformer
The axial turn-to-turn of circle is by electrician leukorrhea（43）Binding, the lower floor laying electrician of the every layer big stock litz wire of the square coil is white
Band, the electrician leukorrhea is laid on four corners of square coil, every layer big stock litz wire per coiling to 1/4 around it is long when, i.e.,
The electrician leukorrhea is grown into part reverse drawing to pushing down tension, the big dividend of square shaped coil below follow-up big stock litz wire
Hereby line carries out axial binding.
5. Large Copacity dry type high frequency high voltage transformer as claimed in claim 1, it is characterised in that：The big stock litz wire（10）
By 5-19 root shallow bid litz wires（11）It is stranded to form.
6. the Large Copacity dry type high frequency high voltage transformer as described in claim 1 or 5, it is characterised in that：The shallow bid litz wire
（11）By 5-19 root copper cash（12）It is twisted into.
7. Large Copacity dry type high frequency high voltage transformer as claimed in claim 1, it is characterised in that：First insulating barrier（91）
By the way of graded insulation, the layer insulation of adjacent high-tension coil and low-voltage coil is divided into N grades, N is natural number, at different levels
Insulation use different isolation materials, the 1st layer conductor coiling to 1/N around it is long when stop coiling, wrap the 1st grade of 1/N it is exhausted
Edge；Further around the 2nd section of 1/N layer line of system, the 2nd grade of 1/N insulation of wrapping；By that analogy, last coiling n-th 1/N layer lines, wrapping N
Class B insulation.
8. Large Copacity dry type high frequency high voltage transformer as claimed in claim 7, it is characterised in that：Described N values are 2-8.
9. Large Copacity dry type high frequency high voltage transformer as claimed in claim 1, it is characterised in that：Height in the square coil
Line ball circle and low-voltage coil are using staggeredly winding method, if a layer line circle is divided into stem portion around length, first coiling is a part of low
Line ball circle, further around a part of high-tension coil, further around a part of low-voltage coil ... until a layer line circle it is complete around long whole coilings
Finish.
10. Large Copacity dry type high frequency high voltage transformer as claimed in claim 9, it is characterised in that：A layer line circle around length
It is divided into M deciles, M values are preferably between 2-8.
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| CN201910148176.4A CN109830364A (en) | 2016-03-18 | 2016-05-04 | Dry type high-frequency high-voltage transformer structure |
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| CN110299242A (en) * | 2019-07-05 | 2019-10-01 | 南京理工大学 | A kind of single-phase dry type high frequency transformer |
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| CN107204233A (en) * | 2016-03-18 | 2017-09-26 | 福建新大陆环保科技有限公司 | A kind of Large Copacity dry type high frequency high voltage transformer |
| CN107170560A (en) * | 2017-07-20 | 2017-09-15 | 银川欣安瑞电气有限公司 | High-frequency and high-voltage water cooling electric discharge transformer |
| CN109448965B (en) * | 2018-12-17 | 2023-06-30 | 上海意兰可电力电子设备有限公司 | High-frequency high-voltage transformer |
| EP4086927B1 (en) * | 2021-05-05 | 2024-03-27 | Hitachi Energy Ltd | Coil for a transformer core |
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