CN110379603A - Folded appendiron core transformer and preparation method thereof - Google Patents
Folded appendiron core transformer and preparation method thereof Download PDFInfo
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- CN110379603A CN110379603A CN201910720855.4A CN201910720855A CN110379603A CN 110379603 A CN110379603 A CN 110379603A CN 201910720855 A CN201910720855 A CN 201910720855A CN 110379603 A CN110379603 A CN 110379603A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 231
- 238000004804 winding Methods 0.000 claims abstract description 76
- 229910052742 iron Inorganic materials 0.000 claims abstract description 46
- 239000002828 fuel tank Substances 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 36
- 239000010959 steel Substances 0.000 claims description 36
- 238000000137 annealing Methods 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 239000011888 foil Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000004321 preservation Methods 0.000 claims description 7
- 238000002791 soaking Methods 0.000 claims description 6
- 239000002023 wood Substances 0.000 claims description 4
- 238000009826 distribution Methods 0.000 abstract description 28
- 229910000808 amorphous metal alloy Inorganic materials 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000009413 insulation Methods 0.000 description 7
- 230000004907 flux Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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
- H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
-
- 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
- H01F27/25—Magnetic cores made from strips or ribbons
-
- 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
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/266—Fastening or mounting the core on casing or 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0213—Manufacturing of magnetic circuits made from strip(s) or ribbon(s)
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0233—Manufacturing of magnetic circuits made from sheets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
Abstract
The present invention provides a kind of folded appendiron core transformers, belong to technical field of transformer manufacturing, including fuel tank；Iron core is arranged in fuel tank；The iron yoke for setting up separately above and below iron core column including three iron core columns disposed in parallel and two and being connect respectively with each iron core column；The cross section of iron core column is respectively circle；Low pressure winding is corresponded with iron core column；Each low pressure winding is respectively sleeved in corresponding iron core column；High-voltage winding is corresponded with low pressure winding；Each high-voltage winding is respectively sleeved in corresponding low pressure winding；And iron core folder, equipped with two groups and it is respectively used to clamp two iron yokes of iron core.The present invention also provides a kind of preparation methods of folded appendiron core transformer.Folded appendiron core transformer provided by the invention and preparation method thereof, has important practical significance at the shortcomings that effectively overcoming amorphous alloy iron core distribution transformer and three-dimensional winding iron core distribution transformer.
Description
Technical field
The invention belongs to technical field of transformer manufacturing, are to be related to a kind of folded appendiron core transformer and its system more specifically
Preparation Method.
Background technique
It is energy-saving to become trend of the times with the growth of society's electricity consumption amount, the most, energy as dosage in electric system
Maximum distribution transformer is consumed, constantly reduction no-load loss, reduction power consumption are trends of the times.
The pattern of country's low-loss distribution transformer is mainly amorphous alloy iron core distribution transformer and three-dimensional winding iron at present
Core distribution transformer, it is basic due to reducing no-load loss technology scarcity that common plane folds iron core ultra-low loss distribution transformer
It is not on space state.
But amorphous alloy iron core distribution transformer is high with price, amorphous band is in short supply, optimization design is difficult, amorphous ribbon
Material is frangible, transformer anti-short circuit capability is poor, noise is high, the shortcomings such as insulation fault easily occur for amorphous fragment, restricts always
It develops.Three-dimensional winding iron core distribution transformer have the problems such as anti-short circuit capability is poor, maintenanceability is difficult and its can not overcome
Defect.
Summary of the invention
The purpose of the present invention is to provide a kind of folded appendiron core transformers and preparation method thereof, it is intended to which solution lacks currently on the market
The technical issues of few low-loss plane folds iron core distribution transformer.
To achieve the above object, the technical solution adopted by the present invention is that: provide a kind of folded appendiron core transformer, comprising: fuel tank；
Iron core is arranged in the fuel tank；Set up separately including three iron core columns disposed in parallel and two in the iron core
The iron yoke being connect above and below column and respectively with each iron core column；The cross section of the iron core column is respectively circle；
Low pressure winding is corresponded with the iron core column；Each low pressure winding is respectively sleeved at the corresponding iron core column
On；
High-voltage winding is corresponded with the low pressure winding；Each high-voltage winding is respectively sleeved at the corresponding low pressure
On winding；And
Iron core folder equipped with two groups and is respectively used to clamp two iron yokes of the iron core.
Further, the cross section of the iron yoke is D-shaped, and the cross-sectional area of the iron yoke is that the iron core column is transversal
1.2-1.5 times of face area.
Further, iron core folder described in every group respectively includes the intermediate plate and company that two are set up separately in the corresponding iron yoke two sides
The bolt of two intermediate plates is connect, each intermediate plate is respectively to be laminated wood clamp piece.
Further, the first floor of the low pressure winding and last layer are welded with outlet copper bar, two outlet copper bars point respectively
Not Wei Yu the low pressure winding top and between the iron yoke and the intermediate plate.
Further, the low pressure winding is the double-deck foil structure, and the high-voltage winding is layered structure.
Further, two-layered foil synchronizes coiling in the low pressure winding.
Further, the iron core column and the iron yoke are laminated by multiple high magnetic conduction steel discs respectively.
The beneficial effect of folded appendiron core transformer provided by the invention is: compared with prior art, the present invention folds iron core and becomes
Depressor uses cross section for circular iron core column, has not only effectively reduced the no-load loss of transformer, but also improves the anti-of transformer
Short-circuit capacity and insulation performance etc. are matched so that the operation of transformer is relatively reliable to effectively overcome amorphous alloy iron core
It the shortcomings that piezoelectric transformer and three-dimensional winding iron core distribution transformer, has important practical significance.
Folded appendiron core transformer provided by the invention is compared with the routinely S11 type standard of folded iron core distribution transformer, zero load damage
Consumption reduces by 40%, and load loss reduces by 24%.With the I grade efficiency of highest level in domestic oil immersion-type distribution transformer efficiency grade
It compares, no-load loss reduces by 16.5%.Performance can be suitable with amorphous alloy iron core distribution transformer and three-dimensional reel iron core transformer,
Folded appendiron core transformer provided in an embodiment of the present invention eliminates that amorphous alloy iron core distribution transformer anti-short circuit capability is poor, noise
Greatly, the deficiencies of poor reliability, the disadvantages of three-dimensional reel iron core transformer anti-short circuit capability is insufficient, recoverability is poor is overcome, is realized
Distribution transformer folds the purpose that core structure realizes ultra-low loss using plane.
The present invention also provides a kind of preparation methods of folded appendiron core transformer, comprising the following steps:
Prepare the iron core；Wherein the cross section of the iron core column is circle；
Successively low pressure winding, insulating layer and the high-voltage winding described in coiling outside the iron core column；
Iron core folder is installed respectively in the top and bottom of the iron yoke；
Wherein, it is described prepare the iron core step the following steps are included:
According to the shape shear steel band of iron core column and iron yoke；
The steel band sheared is put into annealing furnace, is made annealing treatment；
By steel band by taking out in the annealing furnace, it is spliced into the iron core.
Further, the annealing process step the following steps are included:
Heating, until the temperature in the annealing furnace reaches 550 DEG C -650 DEG C；
Heat preservation 1-2 hours；
Continue to heat up with the speed not higher than 50 DEG C/h, until the temperature of the annealing furnace reaches 780 DEG C -830 DEG C；
Heat preservation；Soaking time is calculated according to T=AD+B, and wherein T is soaking time, and unit is minute；A is heating system
Number, unit are minute/millimeter；D is iron core diameter, and unit is millimeter；B is additional time, and unit is minute；
Cooled down with the speed not higher than 30 DEG C/h, until the temperature of the annealing furnace is down to 350 DEG C.
Further, the steel band is the high trade mark steel band of high magnetic conduction, and the heating coefficient is 2 minutes/millimeter, described additional
Time is 130 minutes.
The beneficial effect of the preparation method of folded appendiron core transformer provided by the invention is: compared with prior art, this hair
The preparation method of bright folded appendiron core transformer is first by strip anneal, then assembles them into iron core, this setting effectively increases steel band
Annealing effect so that constitute iron core has obtained abundant annealing per a piece of steel band, to repair each steel band in machine
It is lost caused by tool process, so that each steel band has been restored to the level before processing, reduces the no-load loss of iron core, in turn
Reduce the no-load loss of transformer entirety.Again since the cross section of iron core column in manufactured iron core is circle, both it was effectively reduced
The no-load loss of transformer, and anti-short circuit capability and the insulation performance etc. for improving transformer, so that the operation of transformer
It is relatively reliable, thus the shortcomings that effectively overcoming amorphous alloy iron core distribution transformer and three-dimensional winding iron core distribution transformer, tool
There is important realistic meaning.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is the structural schematic diagram of folded appendiron core transformer provided in an embodiment of the present invention；
Fig. 2 is the sectional structure chart of the line A-A along Fig. 1；
Fig. 3 is the structural schematic diagram of outlet copper bar used by the embodiment of the present invention.
In figure: 10, fuel tank；20, iron core；21, iron core column；22, iron yoke；30, low pressure winding；40, high-voltage winding；50, iron
Core folder；51, intermediate plate；52, bolt；60, outlet copper bar.
Specific embodiment
In order to which technical problems, technical solutions and advantages to be solved are more clearly understood, tie below
Accompanying drawings and embodiments are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
Also referring to Fig. 1 and Fig. 2, now folded appendiron core transformer provided in an embodiment of the present invention is illustrated.It is described folded
Appendiron core transformer is corresponded including fuel tank 10, the iron core being arranged in fuel tank 10 20, low pressure winding 30 and low pressure winding 30
High-voltage winding 40；And iron core folder 50.Iron core 20 includes that three iron core columns 21 disposed in parallel and two set up separately in iron
The iron yoke 22 being connect above and below stem 21 and respectively with each iron core column 21.In iron core 20 iron core column 21 and iron yoke 22 respectively by
Multiple steel disc compositions being stacked.The cross section of each iron core column 21 of iron core 20 is respectively circle, round for approximate circle herein
Shape, since iron core column 21 is multiple stacking steel discs composition, section is only close to circle.Low pressure winding 30 and iron core column 21 1
One is corresponding, and each low pressure winding 30 is respectively sleeved in corresponding iron core column 21.Each high-voltage winding 40 is respectively sleeved at corresponding low pressure
On winding 30.Iron core folder 50 is equipped with two groups and is respectively used to clamp two iron yokes 22 of iron core 20.
It is first according to 22 shape shear steel band of iron core column 21 and iron yoke when preparation, then the steel band sheared is placed into annealing furnace
Inside made annealing treatment, it later will be by steel band stack after annealing at a high temperature at iron core column 21 and iron yoke 22, then by iron core column 21
Iron core 20 is spliced into iron yoke 22；It again will be in low pressure winding 30, insulating layer and high-voltage winding 40 successively coiling to iron core column 21；Peace
Iron core folder 50 is filled, so that one group of iron core folder 50 is by the upper pinch of iron core 20, another group of iron core folder 50 is by iron core 20
Lower part clamps.
Inventor has found that when iron core column 21 is circle, oblong, ellipse, transformer noload losses can through numerous studies
Be substantially reduced, but iron core column 21 be oblong and ellipse when, anti-short circuit capability is poor, and the probability to break down is than iron core column 21
Circular distribution transformer is much bigger.
Folded appendiron core transformer provided in an embodiment of the present invention uses cross section for circular iron core compared with prior art
Column 21, had not only effectively reduced the no-load loss of transformer, but also anti-short circuit capability and insulation performance for improving transformer etc., made
The operation for obtaining transformer is relatively reliable, to effectively overcome amorphous alloy iron core distribution transformer and the change of three-dimensional winding iron core distribution
The shortcomings that depressor, has important practical significance.
Specifically, fuel tank 10 is barrel type structure, it is made of oil tank bottom, oil tank wall, fuel tank cap and its accessory.
As a kind of specific embodiment of folded appendiron core transformer provided by the invention, the cross section of iron yoke 22 is D-shaped, and
The cross-sectional area of iron yoke 22 is 1.2-1.5 times of 21 cross-sectional area of iron core column.
The cross-sectional area of iron yoke 22 is greater than the cross-sectional area of iron core column 21, this makes the magnetic flux density in iron yoke 22 low
Magnetic flux density in iron core column 21, so that the speed that 22 no-load loss of iron yoke reduces is greater than the increased speed of 22 weight of iron yoke
Degree, to effectively reduce the no-load loss of transformer.
Specifically, iron yoke 22 uses D-shaped yoke, i.e., the width of the laminations at different levels of composition iron yoke 22 is by center to close to winding
Side gradually becomes smaller.The weight of iron core column 21 can be reduced in this way, to reduce the no-load loss of 22 part of iron yoke, and then dropped
The low no-load loss of transformer entirety.
It as a kind of specific embodiment of folded appendiron core transformer provided by the invention, please refers to Fig.1 to Fig.3, every group of iron
Core folder 50 respectively includes two bolts 52 set up separately in two intermediate plates 51 of intermediate plate 51 and connection of corresponding 22 two sides of iron yoke, each to press from both sides
Piece 51 is respectively to be laminated wood clamp piece.
Intermediate plate 51 is using lamination wood clamp piece, and compared with using magnetic conduction steel clamp piece, the loss in iron core folder 50 is down to zero, from
And it further reduced the load loss of transformer.
When production, the size of conducting wire in winding can be reduced, so that because the loss that iron core folder 50 reduces increases to winding
In resistance loss, so that the volume of winding reduces, and then reduces the volume and weight of iron core 20, its zero load damage is reduced
Consumption.
Specifically, iron core folder 50 is when clamping iron yoke 22, two intermediate plates 51 in same group of iron core folder 50
It is tightened in core window inboard portion using binding strap, is located at core window exterior portion and is connected using bolt 52.
As a kind of specific embodiment of folded appendiron core transformer provided by the invention, referring to Fig. 3, low pressure winding 30
The first floor and last layer are welded with outlet copper bar 60 respectively, and two outlet copper bars 60 are located at the top of low pressure winding 30 and are located at iron yoke
Between 22 and intermediate plate 51.
The first and last layer of low pressure winding 30 is welded with outlet copper bar 60 respectively, as the head and the tail end of winding, and by winding
It draws on top.Each outlet copper bar 60 between iron yoke 22 and intermediate plate 51 by drawing, so that 10 width direction size of fuel tank further subtracts
It is small, to effectively reduce the production and manufacturing cost of transformer.
As a kind of specific embodiment of folded appendiron core transformer provided by the invention, low pressure winding 30 is the double-deck foil knot
Structure, high-voltage winding 40 are layered structure.
For low pressure winding 30 using the double-deck foil structure, high-voltage winding 40 uses layered structure, high-low pressure winding 30 it is whole around
System together, compared with common product, effectively increases the filling rate of core window, reduces the volume and weight of transformer,
To further reduced the no-load loss of transformer.
Specifically, high-voltage winding 40 is multilayer architecture, layer insulation uses graded insulation, effectively reduces high-voltage winding
40 radial size.The insulating layer between high-low pressure winding 30 is placed after the completion of 30 coiling of low pressure winding outside low pressure winding 30, so
The coiling high-voltage winding 40 outside insulating layer afterwards, so that the compact overall structure of high-low pressure winding 30, and then effectively increase transformation
The space utilization rate of device.
As a kind of specific embodiment of folded appendiron core transformer provided by the invention, two-layered foil is synchronous in low pressure winding 30
Coiling.
Two-layered foil coiling together in low pressure winding 30 further improves the integrally-built compactedness of high-low pressure winding 30,
Transformer is reduced to be taken up space.Two layers of relatively thin foil coiling good operability, while reducing the eddy-current loss of transformer.
As a kind of specific embodiment of folded appendiron core transformer provided by the invention, iron core column 21 and iron yoke 22 respectively by
Multiple high magnetic conduction steel discs are laminated.
Iron yoke 22 and iron core column 21 have the high grade electric steel belt of multiple high magnetic conductions to fold into respectively, and magnetic flux density is lower,
Wherein 21 magnetic flux density of iron core column is up to 1.55T and following.
By the above measure, so that the no-load loss of transformer is greatly lowered, with conventional folded iron core distribution transformer
The S11 type standard of device is compared, and no-load loss reduces by 40%, and load loss reduces by 24%.With domestic oil immersion-type distribution transformer energy
The I grade efficiency of highest level is compared in effect grade, and no-load loss reduces by 16.5%.Performance can be with amorphous alloy iron core distribution transformer
Device and three-dimensional reel iron core transformer are suitable, and folded appendiron core transformer provided in an embodiment of the present invention eliminates amorphous alloy iron core distribution
The deficiencies of transformer anti-short circuit capability is poor, noise is big, poor reliability, overcomes three-dimensional reel iron core transformer anti-short circuit capability not
Enough, the disadvantages of recoverability is poor realizes distribution transformer using plane and folds the purpose that core structure realizes ultra-low loss.
The present invention also provides a kind of preparation methods of folded appendiron core transformer.The preparation method of folded appendiron core transformer, including with
Lower step:
Prepare iron core 20；Wherein the cross section of iron core column 21 is circle；
Successively coiling low pressure winding 30, insulating layer and high-voltage winding 40 outside iron core column 21；
Iron core folder 50 is installed respectively in the top and bottom of iron yoke 22；
Wherein, prepare 20 step of iron core the following steps are included:
According to the shape shear steel band of iron core column 21 and iron yoke 22；
The steel band sheared is put into annealing furnace, is made annealing treatment；
By steel band by taking out in annealing furnace, it is spliced into iron core 20.
The preparation method of folded appendiron core transformer provided by the invention, compared with prior art, first by strip anneal, then by its
It is assembled into iron core 20, this setting effectively increases the annealing effect of steel band, so that constituting obtaining per a piece of steel band for iron core 20
Abundant annealing has been arrived, thus loss caused by having repaired each steel band in mechanical processing process, so that each steel band is restored to
Level before processing, reduces the no-load loss of iron core, thereby reduces the no-load loss of transformer entirety.Again due to manufactured
The cross section of iron core column 21 is circle in iron core 20, has not only effectively reduced the no-load loss of transformer, but also improve transformer
Anti-short circuit capability and insulation performance etc., so that the operation of transformer is relatively reliable, to effectively overcome amorphous alloy iron core
It the shortcomings that distribution transformer and three-dimensional winding iron core distribution transformer, has important practical significance.
A kind of specific embodiment of preparation method as folded appendiron core transformer provided by the invention, annealing process step
The following steps are included:
Heating, until the temperature in annealing furnace reaches 550 DEG C -650 DEG C；
Heat preservation 1-2 hours；
Continue to heat up with the speed not higher than 50 DEG C/h, until the temperature of annealing furnace reaches 780 DEG C -830 DEG C；
Heat preservation；Soaking time is calculated according to T=AD+B, and wherein T is soaking time, and unit is minute；A is heating system
Number, unit are minute/millimeter；D is 20 diameter of iron core, and unit is millimeter；B is additional time, and unit is minute；
Cooled down with the speed not higher than 30 DEG C/h, until the temperature of annealing furnace is down to 350 DEG C.
To make the no-load loss of iron core 20 sufficiently low, inventor is studied for a long period of time, and exploring a set of can make steel band
The sufficiently low annealing process of no-load loss, it is ensured that it is consistent before annealed treated steel band no-load loss and processing.
Wherein, heating coefficient A and B additional time can carry out reasonable set according to the concrete model of steel band, such as when steel band is
When the high trade mark steel band of high magnetic conduction, heating coefficient can be set as 2 minutes/millimeter, being set as additional time 130 minutes.
Specifically, in-furnace temperature heating of annealing in heating step can carry out heat preservation process when 600 DEG C or so.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. folded appendiron core transformer characterized by comprising
Fuel tank；
Iron core is arranged in the fuel tank；Set up separately in the iron core column including three iron core columns disposed in parallel and two
Side and lower section and the iron yoke being connect respectively with each iron core column；The cross section of the iron core column is respectively circle；
Low pressure winding is corresponded with the iron core column；Each low pressure winding is respectively sleeved in the corresponding iron core column；
High-voltage winding is corresponded with the low pressure winding；Each high-voltage winding is respectively sleeved at the corresponding low pressure winding
On；And
Iron core folder equipped with two groups and is respectively used to clamp two iron yokes of the iron core.
2. folded appendiron core transformer as described in claim 1, it is characterised in that: the cross section of the iron yoke is D-shaped, and the iron
The cross-sectional area of yoke is 1.2-1.5 times of the iron core column cross-sectional area.
3. folded appendiron core transformer as described in claim 1, it is characterised in that: iron core folder described in every group respectively includes two points
It is located at the bolt of two intermediate plates of intermediate plate and connection of the corresponding iron yoke two sides, each intermediate plate is respectively to be laminated wood clamp
Piece.
4. folded appendiron core transformer as claimed in claim 3, it is characterised in that: the first floor and last layer of the low pressure winding weld respectively
There is outlet copper bar, two outlet copper bars are located at the top of the low pressure winding and are located at the iron yoke and the intermediate plate
Between.
5. folded appendiron core transformer as described in claim 1, it is characterised in that: the low pressure winding is the double-deck foil structure, institute
Stating high-voltage winding is layered structure.
6. folded appendiron core transformer as claimed in claim 5, it is characterised in that: two-layered foil synchronizes coiling in the low pressure winding.
7. folded appendiron core transformer as claimed in any one of claims 1 to 6, it is characterised in that: the iron core column and the iron yoke point
It is not laminated by multiple high magnetic conduction steel discs.
8. the preparation method of any one of the claim 1-7 folded appendiron core transformer, which comprises the following steps:
Prepare the iron core；Wherein the cross section of the iron core column is circle；
Successively low pressure winding, insulating layer and the high-voltage winding described in coiling outside the iron core column；
Iron core folder is installed respectively in the top and bottom of the iron yoke；
Wherein, it is described prepare the iron core step the following steps are included:
According to the shape shear steel band of iron core column and iron yoke；
The steel band sheared is put into annealing furnace, is made annealing treatment；
By steel band by taking out in the annealing furnace, it is spliced into the iron core.
9. the preparation method of folded appendiron core transformer as claimed in claim 8, which is characterized in that the annealing process step includes
Following steps:
Heating, until the temperature in the annealing furnace reaches 550 DEG C -650 DEG C；
Heat preservation 1-2 hours；
Continue to heat up with the speed not higher than 50 DEG C/h, until the temperature of the annealing furnace reaches 780 DEG C -830 DEG C；
Heat preservation；Soaking time is calculated according to T=AD+B, and wherein T is soaking time, and unit is minute；A is heating coefficient,
Unit is minute/millimeter；D is iron core diameter, and unit is millimeter；B is additional time, and unit is minute；
Cooled down with the speed not higher than 30 DEG C/h, until the temperature of the annealing furnace is down to 350 DEG C.
10. the preparation method of folded appendiron core transformer as claimed in claim 9, it is characterised in that: the steel band is that high magnetic conduction is high
Trade mark steel band, the heating coefficient are 2 minutes/millimeter, and the additional time is 130 minutes.
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| CN210223743U (en) * | 2019-08-06 | 2020-03-31 | 保定天威集团特变电气有限公司 | Laminated iron core transformer |
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| CN1758387A (en) * | 2005-10-17 | 2006-04-12 | 谭勇 | Offshore platform transformer |
| CN203232797U (en) * | 2013-04-01 | 2013-10-09 | 特变电工股份有限公司 | Epoxy pouring dry type transformer |
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