CN105810411A - Structure and process of integrally wound foil coil of low voltage winding of axial split transformer - Google Patents
Structure and process of integrally wound foil coil of low voltage winding of axial split transformer Download PDFInfo
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- CN105810411A CN105810411A CN201610269495.7A CN201610269495A CN105810411A CN 105810411 A CN105810411 A CN 105810411A CN 201610269495 A CN201610269495 A CN 201610269495A CN 105810411 A CN105810411 A CN 105810411A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2847—Sheets; Strips
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2876—Cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—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
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- 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
- H01F41/12—Insulating of windings
- H01F41/122—Insulating between turns or between winding layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2847—Sheets; Strips
- H01F2027/2857—Coil formed from wound foil conductor
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Abstract
The present invention provides a structure and process of an integrally wound foil coil of a low voltage winding of an axial split transformer. The metal foil winding in the present invention is made of copper foil or aluminum foil, and is made by using a two-layer foil winding machine to perform coaxial winding. A middle insulation annular pad is made of cardboard, an insulation distance is reduced to 10 mm to 15 mm, and the consumption of a silicon steel sheet and an insulation material is reduced by 1.2% to 1.5%. A heat dissipation oil passage is of a vertical long structure, a support strip is axially parallel to the oil passage, and end rings are saved, so that it is ensured that oil flow is smooth. In a semi-traversal running state, when one split coil is impacted by short-circuit power, another split coil may be mechanically linked to the short-circuited coil by the long oil passage support strip, so that anti-short circuit strength is improved. The number of low-voltage coils of each transformer that are subjected to winding and sleeving is decreased from the number, 6, of traditional coils made by winding a flat wire to 3, so that working hours of winding and sleeving of low-voltage coils are reduced by 50%, and working efficiency and produce performance are improved.
Description
Technical field
The invention belongs to transformer technology field, especially relate to one 35 kilovolts and the winding integrated coiling foil winding structure of following electric pressure axial split transformer low voltage and technique.
Background technology
In power system, house transformer, open standby transformator and generally adopt low pressure transformer with split winding.Since entering 21 century, along with the increase of China's photovoltaic generation installed capacity, many newly-built photovoltaic power plant, in order to save capital construction investment, more and more widely use low pressure transformer with split winding.Low pressure transformer with split winding has many differences compared with general power transformer, it is made up of a high pressure winding in parallel and several low pressure winding axially or radially divided, the normal electric energy transmission of transformer with split winding only carries out between high pressure, low pressure winding, then has the effect of limiting short-circuit current when fault.Commonly used wide be the axial split transformator of the double; two division of low pressure winding, the low pressure division winding that the outstanding feature of this transformator is two identical capacity can independent operating and mutually standby, can also simultaneously parallel running, when the load connected on some low pressure winding or power failure, another low pressure winding remains to properly functioning, not having the contact of electricity between two division windings, the coupling of magnetic is also relatively weak;Bigger impedance (being generally about 20%~25%) is mutually compensated for it addition, have between the division branch road of this kind of transformator, can limiting short-circuit current effectively.Replace two transformators with electric pressure with this kind of transformator, transformer equipment cost about 30% can be saved, can save floor occupying area and civil engineering cost about 40% simultaneously;The each photovoltaic power plant of Now Domestic generally select 2 groups of 500kWp inverters and 1100kVA transformator with the use of, inverter secondary side voltage is generally 275V or 315V, through transformer boost to 10kV or 35kV grade.Therefore each photovoltaic power plant is day by day urgent to the demand of double winding low pressure transformer with split winding.
Owing to this specification transformer low voltage voltage is low, thus electric current is very big, technology and critical technological point are many, and coil winding is high for man-hour, the manufacturing cost of transformer production producer traditional both at home and abroad is high, and on the low side partly passing through running status (namely only having a branch and high pressure winding load operation in two splitting non-zero branch of low pressure winding) anti-short-circuit capability.35kV and following electric pressure axial split transformator, low pressure winding has two kinds of structural shape low-voltage coils adopt lenticular wire coiling and adopt Copper Foil or aluminium foil coiling, no matter adopting which kind of version, the low pressure winding technique scheme of current domestic axial split transformator is the low pressure winding of two divisions, after adopting independent coiling to combine, carrying out integral assembling again after coiling high voltage winding group respectively again further around high-tension coil processed or outside the low pressure winding of two divisions, high and low pressure winding is system around structural shape.No matter adopting which kind of winding method, the insulating end ring increasing insulation and conduction oil heat radiation it is both needed between the low pressure winding of two divisions, insulating end ring can affect the smoothness of oil flow channel to a certain extent, thus affecting the temperature rise of coil, insulating end ring is because of cooling requirements, generally arrange thicker, cause two low pressure divided big around group distance, cause waste of material.The low pressure winding of two independent coilings, there is winding overall dimensions, the deviation of resistivity or not parity problem, winding dimensional discrepancy can cause main leakage sky road size between high-low pressure winding different and cause impedance voltage deviation, and system can be affected around high-tension coil tightness, thus affecting the anti-short circuit capability of coil.Resistance deviation can reduce the D.C. resistance balance quality of product.The low pressure division coil of traditional structure needs 6 coils of coiling in whole coil-winding process, and man-hour doubles compared with power transformer.
How to design novel low-voltage coil special construction, so as to reduce machining period and material consumption, improving as far as possible compared with traditional structure and partly pass through the anti-short-circuit capability of Axial split transformer under running status, this is the domestic and international key problem in technology point in 35kV and following electric pressure axial split design of transformer just.
Summary of the invention
The technical problem to be solved is: provide a kind of winding integrated coiling foil winding structure of axial split transformer low voltage and technique, is used for solving traditional low pressure division coil waste man-hour and material;Oil flow channel is not smooth, affects temperature rise;Winding dimensional discrepancy, the technical problem such as anti-short circuit capability affecting coil.
The winding integrated coiling foil winding structure of axial split transformer low voltage, it is characterized in that: include division coil and lower division coil, described lower division coil is consistent with the structure of upper division coil, and lower division coil and upper division coil are axially symmetric disposition, between lower division coil and upper division coil, it is provided with middle part dead ring pad;
Described upper division coil includes outer outlet row, interior outlet row, overhang insulation ring pad, heat radiation oil duct, metal forming winding, insulating paper, lift one's head cross-over block, the row's of extraction root cross-over block, the quantity of described outer outlet row is two, two outer outlet row one_to_one corresponding are distributed on division coil and lower division coil, one end of outer outlet row is by argon arc welding and metal forming winding welding, the end of the other end of outer outlet row has bolt connecing hole, and is connected with low-voltage lead connecing hole by this bolt;The quantity of described interior outlet row is two, two interior outlet row one_to_one corresponding are distributed on division coil and lower division coil, one end of interior outlet row is by argon arc welding and metal forming winding welding, the end of the other end of interior outlet row has bolt connecing hole, and being connected with low-voltage lead connecing hole by this bolt, between interior outlet row with outer outlet row, by lifting one's head, cross-over block is fixing to be connected;One end of described overhang insulation ring pad is connected with metal forming winding;A part for described heat radiation oil duct is positioned at the inside of division coil, and another part of heat radiation oil duct is positioned at the inside of lower division coil;The one side of described metal forming winding and insulating paper are fixing to be connected, as insulation between layers after metal forming winding technique coil;The described row of extraction root cross-over block is two pieces, and one of between two outer outlet rows, another block is between two interior outlet rows.
Described metal forming winding is Copper Foil winding or aluminium foil winding.
Described outer outlet row and interior outlet row are copper bar or copper-aluminium transition row.
The technique of the winding integrated coiling foil winding of axial split transformer low voltage, is characterized in that: comprise the following steps
Step one, choose identical metal forming two axle, insulating paper one axle, the wherein width value of insulating paper 30mm~45mm bigger than the width sum of two axle metal formings;
Step 2, two axle metal formings are hung on the drum shelf of double-deck foil winding simultaneously, insulating paper is put on drum shelf, draw the initiating terminal of two axle metal formings and the initiating terminal of insulating paper to work top, the start edge of two axle metal formings and the start edge of insulating paper is made to be located along the same line, two axle metal forming symmetries are laid in the upper surface of insulating paper, and the spacing that two between axle metal forming is 10mm~15mm
Regulate the swelling device of double-deck foil winding, make metal forming and insulating paper keep straightened condition, and the expanding force suffered by two axle metal formings is consistent;
Step 3, choosing two interior outlet rows, make interior outlet row and metal forming one_to_one corresponding, interior outlet row is welded to connect by the start edge of argon arc welding Yu metal forming,
Being fixedly installed in by two interior outlet rows in the fixing groove of winding former of double-deck foil winding, the row's of extraction root cross-over block is filled in the gap between two interior outlet rows, blend compounds band is fixed;
Step 4, arranging number of turns and expanding force on the control panel of double-deck foil winding, wherein number of turns is 5 circle~30 circles, and expanding force is 0.5MPa~0.6MPa,
Start START button, double-deck foil winding starts coiling, after coiling one circle, start " time-out " button, double-deck foil winding suspends, artificial tiling middle part dead ring pad between two axle metal formings, artificial tiling overhang insulation ring pad outside two axle metal formings, and utilize the coil of coiling to push down the start edge of middle part dead ring pad and overhang insulation ring pad
Starting START button, double-deck foil winding starts to continue coiling;
Step 5, when coil winding to number of turns sum 1/2~1/3 in the number of turn value time, start " rotating at a slow speed " button, stay positioned axially successively is started from the circular arc summit of coil, until stopping after coil winding one circle or some circles, the spacing of adjacent two stays is consistent, be 35mm~45mm, stay the space propped up constitutes heat radiation oil duct;
Step 6, starting START button, double-deck foil winding continues coiling, and coiling is after the number of turn set, and double-deck foil winding is automatically stopped, and draws a long straight horizontal line as mark with marking pen at ending number of turn place, in mark place clamping metal forming cutting,
Being fallen back by coil two circles by double-deck foil winding, take the two circle metal formings exited and be flat on workbench, choose two outer outlet rows, make outer outlet row and metal forming one_to_one corresponding, outer outlet row is welded to connect by the tail edge of argon arc welding Yu metal forming;
Step 7, starting START button, by the expanding force coiling again according to step 4 of the metal forming of reversed in step 6, and the row's of extraction root cross-over block is filled in the space between two outer outlet rows, and blend compounds band is fixed;
Double-deck foil winding continues coiling, makes insulating paper wrap up in 6 roads, road~7 at the outer layer of insulating paper in coil outer coating coiling two-layer and with tightening belt;
Step 8, coiling in step 6 is completed after coil thin film parcel complete, open the rotating shaft blocking arm of double-deck foil winding, with driving coil unloaded and collisionless is placed in and puts on coil holder;
Step 9, choosing and lift one's head cross-over block two, be filled between adjacent outer outlet row and interior outlet row respectively and paste fixing with metal forming, the coiling of the winding integrated coiling foil winding of axial split transformer low voltage has worked.
In described step 5, the material of stay is epoxy phenol aldehyde glass cloth laminated board 3240 or H level pulling part, and the outward flange distance of the two ends of stay and insulating paper is 2mm.
The cardboard that middle part dead ring pad is width 10mm~15mm in described step 4, elongate configuration that this cardboard is integrated or constitute for several strip cardboard headtotails, the spacing between width and the two axle metal formings of middle part dead ring pad is consistent.
The cardboard that overhang insulation ring pad is width 10mm~15mm in described step 4, elongate configuration that this cardboard is integrated or constitute for several strip cardboard headtotails, overhang insulation ring pad is completely covered the space between metal forming and insulating paper.
Middle part dead ring pad in described step 4 and the thickness of overhang insulation ring pad all with the consistency of thickness of metal forming.
It is all consistent with interior outlet row thickness that described step 3 arranges root cross-over block, outer outlet row with the extraction in step 7.
Described insulating paper is the Pedicellus et Pericarpium Trapae lattice point gummed paper that 0.13mm is thick.
By above-mentioned design, the present invention can bring following beneficial effect:
Metal forming winding in the present invention adopts Copper Foil or aluminium foil, adopts double-deck foil winding coaxial coiling simultaneously, and division symmetrical above and below is arranged to the paper tinsel of one winding around formula coil.
Middle part dead ring pad it is provided with in the middle of upper division coil and lower division coil, middle part dead ring pad is paperboard, insulation distance is reduced to 10mm~15mm by the about 28.5mm of traditional structure, reduces the 1.2%~1.5% of stalloy and the insulant consumption used in traditional handicraft.
Inside and outside upper division coil and lower division coil, side draws interior outlet row and outer outlet row respectively, adopts cross-over block to fill at system around the neutral gear space of rear thiol, it is ensured that axial support when outlet row is impacted by short-circuit force.
The heat radiation oil duct of upper division coil and lower division coil is upper and lower elongated structure, the axially in parallel oil duct of stay, and material is epoxy phenol aldehyde glass cloth laminated board 3240 or H level pulling part, and this structure eliminates end circle than traditional structure, it is ensured that it is unobstructed that oil flows.Under partly passing through running status, a certain division coil is subject to short-circuit electromotive force to be impacted, and short-circuited coil can be played a mechanical linkage effect by elongated oil duct stay by another division coil, improves anti-short-circuit strength.
The winding integrated coiling foil winding structure of a kind of axial split transformer low voltage that the present invention relates to, every low voltage winding in transformers coiling and suit are reduced to 3 by 6 of the loop construction of tradition lenticular wire coiling, reduce low-voltage coil coiling and are set with man-hour 50%.
Heat radiation oil duct is the elongated structure of upper lower coil, it is ensured that it is unobstructed that oil flows, and improves coil radiating effect.This loop construction adopts the coaxial coiling of double-deck foil winding, compared with the independent coiling rear enclosure assembling structure of conventional low axial split coil two sections, save coiling and coil groups ETL estimated time of loading, improve work efficiency, especially for low pressure low-voltage and high-current product, ensure that the concordance of low-voltage coil D.C. resistance, reduce D.C. resistance unbalance factor, improve properties of product.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated:
Fig. 1 is the axial winding integrated coiling foil winding structural representation of transformer with split winding low pressure in axial split transformer low voltage of the present invention winding integrated coiling foil winding structure and technique.
Fig. 2 is axial transformer with split winding low pressure winding integrated coiling foil winding plan structure schematic diagram in axial split transformer low voltage of the present invention winding integrated coiling foil winding structure and technique.
Fig. 3 is the position relationship of insulating paper, metal forming winding, middle part dead ring pad and overhang insulation ring pad in the winding integrated coiling foil winding structure of axial split transformer low voltage of the present invention and technique.
In figure, 1-divides and divides outlet row in coil, 3-outer outlet row, 4-under coil, 2-, 5-overhang insulation ring pad, 6-heat radiation oil duct, 7-metal forming winding, 8-insulating paper, 9-lift one's head cross-over block, 10-draws dead ring pad in the middle part of row root cross-over block, 11-.
Detailed description of the invention
As shown in the figure, the winding integrated coiling foil winding structure of axial split transformer low voltage, it is characterized in that: include division coil 1 and lower division coil 2, described lower division coil 2 is consistent with the structure of upper division coil 1, and lower division coil 2 and upper division coil 1 are in axially symmetric disposition, are provided with middle part dead ring pad 11 between lower division coil 2 and upper division coil 1;
Described upper division coil 1 includes outer outlet row 3, interior outlet row 4, overhang insulation ring pad 5, heat radiation oil duct 6, metal forming winding 7, insulating paper 8, lift one's head cross-over block 9, the row's of extraction root cross-over block 10, the quantity of described outer outlet row 3 is two, two outer outlet row 3 one_to_one corresponding are distributed on division coil 1 and lower division coil 2, one end of outer outlet row 3 is welded with metal forming winding 7 by argon arc welding, the end of the other end of outer outlet row 3 has bolt connecing hole, and is connected with low-voltage lead connecing hole by this bolt;The quantity of described interior outlet row 4 is two, two interior outlet row 4 one_to_one corresponding are distributed on division coil 1 and lower division coil 2, one end of interior outlet row 4 is welded with metal forming winding 7 by argon arc welding, the end of the other end of interior outlet row 4 has bolt connecing hole, and being connected with low-voltage lead connecing hole by this bolt, between interior outlet row 4 with outer outlet row 3, by lifting one's head, cross-over block 9 is fixing to be connected;One end of described overhang insulation ring pad 5 is connected with metal forming winding 7;A part for described heat radiation oil duct 6 is positioned at the inside of division coil 1, and another part of heat radiation oil duct 6 is positioned at the inside of lower division coil 2;The one side of described metal forming winding 7 and insulating paper 8 is fixing to be connected, as insulation between layers after metal forming winding 7 coiling;The described row of extraction root cross-over block 10 is two pieces, and one of between two outer outlet rows 3, another block is between two interior outlet rows 4.
Described metal forming winding 7 is Copper Foil winding or aluminium foil winding.
Described outer outlet row 3 and interior outlet row 4 are copper bar or copper-aluminium transition row.
The technique of the winding integrated coiling foil winding of axial split transformer low voltage, is characterized in that: comprise the following steps
Step one, according to drawing requirement, choose identical metal forming two axle, insulating paper 8 one axle, the wherein width value of insulating paper 8 30mm~45mm bigger than the width sum of two axle metal formings;
Step 2, two axle metal formings are hung on the drum shelf of double-deck foil winding simultaneously, insulating paper 8 is put on drum shelf, draw the initiating terminal of two axle metal formings and the initiating terminal of insulating paper 8 to work top, the start edge of two axle metal formings and the start edge of insulating paper 8 is made to be located along the same line, two axle metal forming symmetries are laid in the upper surface of insulating paper 8, and the spacing that two between axle metal forming is 10mm~15mm
Regulate the swelling device of double-deck foil winding, make metal forming and insulating paper 8 keep straightened condition, and the expanding force suffered by two axle metal formings is consistent;
Step 3, choosing two interior outlet rows 4, make interior outlet row 4 and metal forming one_to_one corresponding, interior outlet row 4 is welded to connect by the start edge of argon arc welding Yu metal forming,
Being fixedly installed in by two interior outlet rows 4 in the fixing groove of winding former of double-deck foil winding, the row's of extraction root cross-over block 10 is filled in the gap between two interior outlet rows 4, blend compounds band is fixed;
Step 4, arranging number of turns and expanding force on the control panel of double-deck foil winding according to drawing requirement, wherein number of turns is a value in 5 circle~30 circles, and expanding force is 0.5MPa~0.6MPa,
Start START button, double-deck foil winding starts coiling, after coiling one circle, start " time-out " button, double-deck foil winding suspends, artificial tiling middle part dead ring pad 11 between two axle metal formings, artificial tiling overhang insulation ring pad 5 outside two axle metal formings, and utilize the coil of coiling to push down the start edge of middle part dead ring pad 11 and overhang insulation ring pad 5
Starting START button, double-deck foil winding starts to continue coiling;
Step 5, when coil winding to number of turns sum 1/2~1/3 in the number of turn value time, the numerical value specified in this number of turn value alternatively drawing, start " rotating at a slow speed " button, stay positioned axially successively is started from the circular arc summit of coil, until stopping after coil winding one circle or some circles, the spacing of adjacent two stays is consistent, is 35mm~45mm, stay the space propped up constitutes heat radiation oil duct 6;
Step 6, starting START button, double-deck foil winding continues coiling, and coiling is after the number of turn set, and double-deck foil winding is automatically stopped, and draws a long straight horizontal line as mark with marking pen at ending number of turn place, in mark place clamping metal forming cutting,
Being fallen back by coil two circles by double-deck foil winding, take the two circle metal formings exited and be flat on workbench, choose two outer outlet rows 3, make outer outlet row 3 and metal forming one_to_one corresponding, outer outlet row 3 is welded to connect by the tail edge of argon arc welding Yu metal forming;
Step 7, starting START button, by the expanding force coiling again according to step 4 of the metal forming of reversed in step 6, and the row's of extraction root cross-over block 10 is filled in the space between two outer outlet rows 3, and blend compounds band is fixed,
Double-deck foil winding continues coiling, makes insulating paper 8 wrap up in 6 roads, road~7 at the outer layer of insulating paper 8 in coil outer coating coiling two-layer and with tightening belt;
Step 8, coiling in step 6 is completed after coil thin film parcel complete, open the rotating shaft blocking arm of double-deck foil winding, with driving coil unloaded and collisionless is placed in and puts on coil holder;
Step 9, choosing and lift one's head cross-over block 9 two, be filled between adjacent outer outlet row 3 and interior outlet row 4 respectively and paste fixing with metal forming, the coiling of the winding integrated coiling foil winding of axial split transformer low voltage has worked.
In described step 5, the material of stay is epoxy phenol aldehyde glass cloth laminated board 3240 or H level pulling part, and the outward flange distance of the two ends of stay and insulating paper 8 is 2mm.
The cardboard that middle part dead ring pad 11 is width 10mm~15mm in described step 4, elongate configuration that this cardboard is integrated or constitute for several strip cardboard headtotails, the spacing between width and the two axle metal formings of middle part dead ring pad 11 is consistent.
The cardboard that overhang insulation ring pad 5 is width 10mm~15mm in described step 4, elongate configuration that this cardboard is integrated or constitute for several strip cardboard headtotails, overhang insulation ring pad 5 is completely covered the space between metal forming and insulating paper 8.
Middle part dead ring pad 11 in described step 4 and the thickness of overhang insulation ring pad 5 all with the consistency of thickness of metal forming.
It is all consistent with interior outlet row 4 thickness that described step 3 arranges root cross-over block 10, outer outlet row 3 with the extraction in step 7.
Described insulating paper 8 is the Pedicellus et Pericarpium Trapae lattice point gummed paper that 0.13mm is thick.
The foreign current that outer outlet row 3 is upper division coil 1 and lower division coil 2 draws outlet copper bar, generally uses as a1 (a2), and conveniently go between extraction.
The internal current that interior outlet row 4 is upper division coil 1 and lower division coil 2 draws outlet copper bar, generally uses as x1 (x2).
Overhang insulation ring pad 5 is upper division coil 1 and the overhang insulation of lower division coil 2, and iron yoke and high-tension coil play increase insulation distance effect.
Heat radiation oil duct 6 is by for elongated structure, the axial oil duct of stay in heat radiation oil duct 6 is placed, and the height of heat radiation oil duct 6 is compared with the little 4mm of coil whole height, and the material of stay is epoxy phenol aldehyde glass cloth laminated board 3240 or H level pulling part, this structure relatively traditional structure eliminates end circle, it is ensured that it is unobstructed that oil flows.Under partly passing through running status, a certain division coil is subject to short-circuit electromotive force to be impacted, and short-circuited coil can be played a mechanical linkage effect by elongated oil duct stay by another division coil, improves anti-short-circuit strength.Stay quantity is uniformly placed fixing by 35mm~45mm spacing, and when oil duct quantity is more than 1, the stay correspondence of different oil ducts is placed, it is ensured that short-circuit strength.
Middle part dead ring pad 11 is the insulation between upper division coil 1 and lower division coil 2, processes for cardboard, and insulation distance is reduced to 10mm by about the 28.5mm of traditional structure, reduces the consumption 1.2%~1.5% of stalloy and insulant.
Metal forming winding 7 is Copper Foil or aluminium foil.
Insulating paper 8 is the Pedicellus et Pericarpium Trapae lattice point gummed paper that thickness is 0.13mm, and insulating paper 8 is elongated structure, and upper division coil 1 and lower division coil 2 share one, coiling together with upper-lower section metal forming.
Metal forming winding 7 is bonded together after processing with insulating paper 8 drying between the two, improves anti-short-circuit strength.
Lift one's head the cross-over block between cross-over block 9 and outer outlet row 3 and interior outlet row 4, play supporting function when insulation and short circuit.
The row's of extraction root cross-over block 10 be outer outlet row 3 root and the root of outer outlet row 3 between, cross-over block between root and the root of interior outlet row 4 of interior outlet row 4, the row's of extraction root cross-over block 10 is fixed by adhesive tape and metal forming after placing.
Upper division coil 1 and lower division coil 2 use the coaxial coiling simultaneously of double-deck foil winding, and the thickness of Copper Foil or aluminium foil is below 1.0mm, it is possible to be prevented effectively from inside shrinkage stress.
Sum up according to product development experience and manufacture, based on this loop construction coiling, the manufacturability lifted one's head, the winding number of turn of upper division coil 1 and the number of turn of lower division coil 2, stay gear number, upper division coil 1 and lower division coil 2 and coiling direction all follow the ad hoc rule of the industry.
The technique of the winding integrated coiling foil winding of embodiment one, axial split transformer low voltage, is characterized in that: comprise the following steps
Step one, according to drawing requirement, choose identical metal forming two axle, insulating paper 8 one axle, the wherein width value of insulating paper 8 30mm bigger than the width sum of two axle metal formings;
Step 2, two axle metal formings are hung on the drum shelf of double-deck foil winding simultaneously, insulating paper 8 is put on drum shelf, draw the initiating terminal of two axle metal formings and the initiating terminal of insulating paper 8 to work top, the start edge of two axle metal formings and the start edge of insulating paper 8 is made to be located along the same line, two axle metal forming symmetries are laid in the upper surface of insulating paper 8, and the spacing that two between axle metal forming is 10mm
Regulate the swelling device of double-deck foil winding, make metal forming and insulating paper 8 keep straightened condition, and the expanding force suffered by two axle metal formings is consistent;
Step 3, choosing two interior outlet rows 4, make interior outlet row 4 and metal forming one_to_one corresponding, interior outlet row 4 is welded to connect by the start edge of argon arc welding Yu metal forming,
Being fixedly installed in by two interior outlet rows 4 in the fixing groove of winding former of double-deck foil winding, the row's of extraction root cross-over block 10 is filled in the gap between two interior outlet rows 4, blend compounds band is fixed;
Step 4, arranging number of turns and expanding force on the control panel of double-deck foil winding according to drawing requirement, wherein number of turns is 5 circles, and expanding force is 0.5MPa~0.6MPa,
Start START button, double-deck foil winding starts coiling, after coiling one circle, start " time-out " button, double-deck foil winding suspends, artificial tiling middle part dead ring pad 11 between two axle metal formings, artificial tiling overhang insulation ring pad 5 outside two axle metal formings, and utilize the coil of coiling to push down the start edge of middle part dead ring pad 11 and overhang insulation ring pad 5
Starting START button, double-deck foil winding starts to continue coiling;
Step 5, when coil winding to 2 circle, start " rotate at a slow speed " button, start stay positioned axially successively from the circular arc summit of coil, until stopping after coil winding one circle, the spacing of adjacent two stays is consistent, is 35mm, stay the space propped up constitutes heat radiation oil duct 6;
Step 6, starting START button, double-deck foil winding continues coiling, and coiling is after the number of turn set, and double-deck foil winding is automatically stopped, and draws a long straight horizontal line as mark with marking pen at ending number of turn place, in mark place clamping metal forming cutting,
Being fallen back by coil two circles by double-deck foil winding, take the two circle metal formings exited and be flat on workbench, choose two outer outlet rows 3, make outer outlet row 3 and metal forming one_to_one corresponding, outer outlet row 3 is welded to connect by the tail edge of argon arc welding Yu metal forming;
Step 7, starting START button, by the expanding force coiling again according to step 4 of the metal forming of reversed in step 6, and the row's of extraction root cross-over block 10 is filled in the space between two outer outlet rows 3, and blend compounds band is fixed,
Double-deck foil winding continues coiling, makes insulating paper 8 in coil outer coating coiling two-layer and wrap up in 6 roads with tightening belt at the outer layer of insulating paper 8;
Step 8, coiling in step 6 is completed after coil thin film parcel complete, open the rotating shaft blocking arm of double-deck foil winding, with driving coil unloaded and collisionless is placed in and puts on coil holder;
Step 9, choosing and lift one's head cross-over block 9 two, be filled between adjacent outer outlet row 3 and interior outlet row 4 respectively and paste fixing with metal forming, the coiling of the winding integrated coiling foil winding of axial split transformer low voltage has worked.
In described step 5, the material of stay is epoxy phenol aldehyde glass cloth laminated board 3240 or H level pulling part, and the outward flange distance of the two ends of stay and insulating paper 8 is 2mm.
The cardboard that middle part dead ring pad 11 is width 10mm in described step 4, elongate configuration that this cardboard is integrated or constitute for several strip cardboard headtotails, the spacing between width and the two axle metal formings of middle part dead ring pad 11 is consistent.
The cardboard that overhang insulation ring pad 5 is width 10mm in described step 4, elongate configuration that this cardboard is integrated or constitute for several strip cardboard headtotails, overhang insulation ring pad 5 is completely covered the space between metal forming and insulating paper 8.
Middle part dead ring pad 11 in described step 4 and the thickness of overhang insulation ring pad 5 all with the consistency of thickness of metal forming.
It is all consistent with interior outlet row 4 thickness that described step 3 arranges root cross-over block 10, outer outlet row 3 with the extraction in step 7.
Described insulating paper 8 is the Pedicellus et Pericarpium Trapae lattice point gummed paper that 0.13mm is thick.
The technique of the winding integrated coiling foil winding of embodiment two, axial split transformer low voltage, is characterized in that: comprise the following steps
Step one, according to drawing requirement, choose identical metal forming two axle, insulating paper 8 one axle, the wherein width value of insulating paper 8 40mm bigger than the width sum of two axle metal formings;
Step 2, two axle metal formings are hung on the drum shelf of double-deck foil winding simultaneously, insulating paper 8 is put on drum shelf, draw the initiating terminal of two axle metal formings and the initiating terminal of insulating paper 8 to work top, the start edge of two axle metal formings and the start edge of insulating paper 8 is made to be located along the same line, two axle metal forming symmetries are laid in the upper surface of insulating paper 8, and the spacing that two between axle metal forming is 10mm
Regulate the swelling device of double-deck foil winding, make metal forming and insulating paper 8 keep straightened condition, and the expanding force suffered by two axle metal formings is consistent;
Step 3, choosing two interior outlet rows 4, make interior outlet row 4 and metal forming one_to_one corresponding, interior outlet row 4 is welded to connect by the start edge of argon arc welding Yu metal forming,
Being fixedly installed in by two interior outlet rows 4 in the fixing groove of winding former of double-deck foil winding, the row's of extraction root cross-over block 10 is filled in the gap between two interior outlet rows 4, blend compounds band is fixed;
Step 4, arranging number of turns and expanding force on the control panel of double-deck foil winding according to drawing requirement, wherein number of turns is 20 circles, and expanding force is 0.5MPa~0.6MPa,
Start START button, double-deck foil winding starts coiling, after coiling one circle, start " time-out " button, double-deck foil winding suspends, artificial tiling middle part dead ring pad 11 between two axle metal formings, artificial tiling overhang insulation ring pad 5 outside two axle metal formings, and utilize the coil of coiling to push down the start edge of middle part dead ring pad 11 and overhang insulation ring pad 5
Starting START button, double-deck foil winding starts to continue coiling;
Step 5, when coil winding to 8 circle, start " rotate at a slow speed " button, start stay positioned axially successively from the circular arc summit of coil, until stopping after coil winding one circle, the spacing of adjacent two stays is consistent, is 40mm, stay the space propped up constitutes heat radiation oil duct 6;
Step 6, starting START button, double-deck foil winding continues coiling, and coiling is after the number of turn set, and double-deck foil winding is automatically stopped, and draws a long straight horizontal line as mark with marking pen at ending number of turn place, in mark place clamping metal forming cutting,
Being fallen back by coil two circles by double-deck foil winding, take the two circle metal formings exited and be flat on workbench, choose two outer outlet rows 3, make outer outlet row 3 and metal forming one_to_one corresponding, outer outlet row 3 is welded to connect by the tail edge of argon arc welding Yu metal forming;
Step 7, starting START button, by the expanding force coiling again according to step 4 of the metal forming of reversed in step 6, and the row's of extraction root cross-over block 10 is filled in the space between two outer outlet rows 3, and blend compounds band is fixed,
Double-deck foil winding continues coiling, makes insulating paper 8 in coil outer coating coiling two-layer and wrap up in 6 roads with tightening belt at the outer layer of insulating paper 8;
Step 8, coiling in step 6 is completed after coil thin film parcel complete, open the rotating shaft blocking arm of double-deck foil winding, with driving coil unloaded and collisionless is placed in and puts on coil holder;
Step 9, choosing and lift one's head cross-over block 9 two, be filled between adjacent outer outlet row 3 and interior outlet row 4 respectively and paste fixing with metal forming, the coiling of the winding integrated coiling foil winding of axial split transformer low voltage has worked.
In described step 5, the material of stay is epoxy phenol aldehyde glass cloth laminated board 3240 or H level pulling part, and the outward flange distance of the two ends of stay and insulating paper 8 is 2mm.
The cardboard that middle part dead ring pad 11 is width 15mm in described step 4, elongate configuration that this cardboard is integrated or constitute for several strip cardboard headtotails, the spacing between width and the two axle metal formings of middle part dead ring pad 11 is consistent.
The cardboard that overhang insulation ring pad 5 is width 15mm in described step 4, elongate configuration that this cardboard is integrated or constitute for several strip cardboard headtotails, overhang insulation ring pad 5 is completely covered the space between metal forming and insulating paper 8.
Middle part dead ring pad 11 in described step 4 and the thickness of overhang insulation ring pad 5 all with the consistency of thickness of metal forming.
It is all consistent with interior outlet row 4 thickness that described step 3 arranges root cross-over block 10, outer outlet row 3 with the extraction in step 7.
Described insulating paper 8 is the Pedicellus et Pericarpium Trapae lattice point gummed paper that 0.13mm is thick.
The technique of the winding integrated coiling foil winding of embodiment three, axial split transformer low voltage, is characterized in that: comprise the following steps
Step one, according to drawing requirement, choose identical metal forming two axle, insulating paper 8 one axle, the wherein width value of insulating paper 8 45mm bigger than the width sum of two axle metal formings;
Step 2, two axle metal formings are hung on the drum shelf of double-deck foil winding simultaneously, insulating paper 8 is put on drum shelf, draw the initiating terminal of two axle metal formings and the initiating terminal of insulating paper 8 to work top, the start edge of two axle metal formings and the start edge of insulating paper 8 is made to be located along the same line, two axle metal forming symmetries are laid in the upper surface of insulating paper 8, and the spacing that two between axle metal forming is 15mm
Regulate the swelling device of double-deck foil winding, make metal forming and insulating paper 8 keep straightened condition, and the expanding force suffered by two axle metal formings is consistent;
Step 3, choosing two interior outlet rows 4, make interior outlet row 4 and metal forming one_to_one corresponding, interior outlet row 4 is welded to connect by the start edge of argon arc welding Yu metal forming,
Being fixedly installed in by two interior outlet rows 4 in the fixing groove of winding former of double-deck foil winding, the row's of extraction root cross-over block 10 is filled in the gap between two interior outlet rows 4, blend compounds band is fixed;
Step 4, arranging number of turns and expanding force on the control panel of double-deck foil winding according to drawing requirement, wherein number of turns is 30 circles, and expanding force is 0.5MPa~0.6MPa,
Start START button, double-deck foil winding starts coiling, after coiling one circle, start " time-out " button, double-deck foil winding suspends, artificial tiling middle part dead ring pad 11 between two axle metal formings, artificial tiling overhang insulation ring pad 5 outside two axle metal formings, and utilize the coil of coiling to push down the start edge of middle part dead ring pad 11 and overhang insulation ring pad 5
Starting START button, double-deck foil winding starts to continue coiling;
Step 5, when coil winding to 15 circle, start " rotate at a slow speed " button, start stay positioned axially successively from the circular arc summit of coil, until stopping after coil winding one circle, the spacing of adjacent two stays is consistent, is 45mm, stay the space propped up constitutes heat radiation oil duct 6;
Step 6, starting START button, double-deck foil winding continues coiling, and coiling is after the number of turn set, and double-deck foil winding is automatically stopped, and draws a long straight horizontal line as mark with marking pen at ending number of turn place, in mark place clamping metal forming cutting,
Being fallen back by coil two circles by double-deck foil winding, take the two circle metal formings exited and be flat on workbench, choose two outer outlet rows 3, make outer outlet row 3 and metal forming one_to_one corresponding, outer outlet row 3 is welded to connect by the tail edge of argon arc welding Yu metal forming;
Step 7, starting START button, by the expanding force coiling again according to step 4 of the metal forming of reversed in step 6, and the row's of extraction root cross-over block 10 is filled in the space between two outer outlet rows 3, and blend compounds band is fixed,
Double-deck foil winding continues coiling, makes insulating paper 8 in coil outer coating coiling two-layer and wrap up in 7 roads with tightening belt at the outer layer of insulating paper 8;
Step 8, coiling in step 6 is completed after coil thin film parcel complete, open the rotating shaft blocking arm of double-deck foil winding, with driving coil unloaded and collisionless is placed in and puts on coil holder;
Step 9, choosing and lift one's head cross-over block 9 two, be filled between adjacent outer outlet row 3 and interior outlet row 4 respectively and paste fixing with metal forming, the coiling of the winding integrated coiling foil winding of axial split transformer low voltage has worked.
In described step 5, the material of stay is epoxy phenol aldehyde glass cloth laminated board 3240 or H level pulling part, and the outward flange distance of the two ends of stay and insulating paper 8 is 2mm.
The cardboard that middle part dead ring pad 11 is width 15mm in described step 4, elongate configuration that this cardboard is integrated or constitute for several strip cardboard headtotails, the spacing between width and the two axle metal formings of middle part dead ring pad 11 is consistent.
The cardboard that overhang insulation ring pad 5 is width 15mm in described step 4, elongate configuration that this cardboard is integrated or constitute for several strip cardboard headtotails, overhang insulation ring pad 5 is completely covered the space between metal forming and insulating paper 8.
Middle part dead ring pad 11 in described step 4 and the thickness of overhang insulation ring pad 5 all with the consistency of thickness of metal forming.
It is all consistent with interior outlet row 4 thickness that described step 3 arranges root cross-over block 10, outer outlet row 3 with the extraction in step 7.
Described insulating paper 8 is the Pedicellus et Pericarpium Trapae lattice point gummed paper that 0.13mm is thick.
Claims (10)
1. the winding integrated coiling foil winding structure of axial split transformer low voltage, it is characterized in that: include division coil (1) and lower division coil (2), described lower division coil (2) is consistent with the structure of upper division coil (1), and lower division coil (2) and upper division coil (1) are in axially symmetric disposition, between lower division coil (2) and upper division coil (1), it is provided with middle part dead ring pad (11);
Described upper division coil (1) includes outer outlet row (3), interior outlet row (4), overhang insulation ring pad (5), heat radiation oil duct (6), metal forming winding (7), insulating paper (8), lift one's head cross-over block (9), row's of extraction root cross-over block (10), the quantity of described outer outlet row (3) is two, two outer outlet row (3) one_to_one corresponding are distributed on division coil (1) and lower division coil (2), one end of outer outlet row (3) is welded with metal forming winding (7) by argon arc welding, the end of the other end of outer outlet row (3) has bolt connecing hole, and it is connected with low-voltage lead connecing hole by this bolt;The quantity of described interior outlet row (4) is two, two interior outlet row (4) one_to_one corresponding are distributed on division coil (1) and lower division coil (2), one end of interior outlet row (4) is welded with metal forming winding (7) by argon arc welding, the end of the other end of interior outlet row (4) has bolt connecing hole, and being connected with low-voltage lead connecing hole by this bolt, between interior outlet row (4) with outer outlet row (3), by lifting one's head, cross-over block (9) is fixing to be connected;One end of described overhang insulation ring pad (5) is connected with metal forming winding (7);A part for described heat radiation oil duct (6) is positioned at the inside of division coil (1), and another part of heat radiation oil duct (6) is positioned at the inside of lower division coil (2);The one side of described metal forming winding (7) and insulating paper (8) are fixing to be connected, as insulation between layers after metal forming winding (7) coiling;Described row's of extraction root cross-over block (10) is two pieces, one of is positioned between two outer outlet rows (3), and another block is positioned between two outlet rows (4).
2. the winding integrated coiling foil winding structure of axial split transformer low voltage according to claim 1, is characterized in that: described metal forming winding (7) is Copper Foil winding or aluminium foil winding.
3. the winding integrated coiling foil winding structure of axial split transformer low voltage according to claim 1, is characterized in that: described outer outlet row (3) and interior outlet row (4) are copper bar or copper-aluminium transition row.
4. the technique of the winding integrated coiling foil winding of axial split transformer low voltage, is characterized in that: comprise the following steps
Step one, choose identical metal forming two axle, insulating paper (8) axle, wherein the width value 30mm~45mm bigger than the width sum of two axle metal formings of insulating paper (8);
Step 2, two axle metal formings are hung on the drum shelf of double-deck foil winding simultaneously, insulating paper (8) is put on drum shelf, draw the initiating terminal of two axle metal formings and the initiating terminal of insulating paper (8) to work top, the start edge of two axle metal formings and the start edge of insulating paper (8) is made to be located along the same line, two axle metal forming symmetries are laid in the upper surface of insulating paper (8), and the spacing that two between axle metal forming is 10mm~15mm
Regulate the swelling device of double-deck foil winding, make metal forming and insulating paper (8) keep straightened condition, and the expanding force suffered by two axle metal formings is consistent;
Step 3, choosing two interior outlet rows (4), make interior outlet row (4) and metal forming one_to_one corresponding, interior outlet row (4) is welded to connect by the start edge of argon arc welding Yu metal forming,
Two interior outlet rows (4) being fixedly installed in the fixing groove of winding former of double-deck foil winding, row's of extraction root cross-over block (10) is filled in the gap between two interior outlet rows (4), blend compounds band is fixed;
Step 4, arranging number of turns and expanding force on the control panel of double-deck foil winding, wherein number of turns is 5 circle~30 circles, and expanding force is 0.5MPa~0.6MPa,
Start START button, double-deck foil winding starts coiling, after coiling one circle, start " time-out " button, double-deck foil winding suspends, artificial tiling middle part dead ring pad (11) between two axle metal formings, artificial tiling overhang insulation ring pad (5) outside two axle metal formings, and utilize the coil of coiling to push down the start edge of middle part dead ring pad (11) and overhang insulation ring pad (5)
Starting START button, double-deck foil winding starts to continue coiling;
Step 5, when coil winding to number of turns sum 1/2~1/3 in the number of turn value time, start " rotating at a slow speed " button, stay positioned axially successively is started from the circular arc summit of coil, until stopping after coil winding one circle or some circles, the spacing of adjacent two stays is consistent, be 35mm~45mm, stay the space propped up constitutes heat radiation oil duct (6);
Step 6, starting START button, double-deck foil winding continues coiling, and coiling is after the number of turn set, and double-deck foil winding is automatically stopped, and draws a long straight horizontal line as mark with marking pen at ending number of turn place, in mark place clamping metal forming cutting,
Coil fallen back two circles by double-deck foil winding, take the two circle metal formings exited and be flat on workbench, choose two outer outlet rows (3), making outer outlet row (3) and metal forming one_to_one corresponding, outer outlet row (3) is welded to connect by the tail edge of argon arc welding Yu metal forming;
Step 7, number of turns is set on the control panel of double-deck foil winding, start START button, by the expanding force coiling again according to step 4 of the metal forming of reversed in step 6, and space filling extraction row's root cross-over block (10) between two outer outlet rows (3), blend compounds band is fixed
Double-deck foil winding continues coiling, makes insulating paper (8) wrap up in 6 roads, road~7 at the outer layer of insulating paper (8) in coil outer coating coiling two-layer and with tightening belt;
Step 8, coiling in step 6 is completed after coil thin film parcel complete, open the rotating shaft blocking arm of double-deck foil winding, with driving coil unloaded and collisionless is placed in and puts on coil holder;
Step 9, choose and lift one's head cross-over block (9) two, being filled between adjacent outer outlet row (3) and interior outlet row (4) respectively and paste fixing with metal forming, the coiling of the winding integrated coiling foil winding of axial split transformer low voltage has worked.
5. the technique of the winding integrated coiling foil winding of axial split transformer low voltage according to claim 4, it is characterized in that: in described step 5, the material of stay is epoxy phenol aldehyde glass cloth laminated board 3240 or H level pulling part, the outward flange distance of the two ends of stay and insulating paper (8) is 2mm.
6. the technique of the winding integrated coiling foil winding of axial split transformer low voltage according to claim 4, it is characterized in that: the cardboard that middle part dead ring pad (11) in described step 4 is width 10mm~15mm, elongate configuration that this cardboard is integrated or constitute for several strip cardboard headtotails, the spacing between width and the two axle metal formings at middle part dead ring pad (11) is consistent.
7. the technique of the winding integrated coiling foil winding of axial split transformer low voltage according to claim 4, it is characterized in that: the cardboard that overhang insulation ring pad (5) in described step 4 is width 10mm~15mm, elongate configuration that this cardboard is integrated or constitute for several strip cardboard headtotails, overhang insulation ring pad (5) is completely covered the space between metal forming and insulating paper (8).
8. the technique of the winding integrated coiling foil winding of axial split transformer low voltage according to claim 4, is characterized in that: middle part dead ring pad (11) in described step 4 and the thickness of overhang insulation ring pad (5) all with the consistency of thickness of metal forming.
9. the technique of the winding integrated coiling foil winding of axial split transformer low voltage according to claim 4, is characterized in that: described step 3 with in step 7 extraction arrange root cross-over block (10), outer outlet row (3) all consistent with interior outlet row (4) thickness.
10. the technique of the winding integrated coiling foil winding of axial split transformer low voltage according to claim 4, is characterized in that: described insulating paper (8) is Pedicellus et Pericarpium Trapae lattice point gummed paper thick for 0.13mm.
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CN106298191B (en) * | 2016-09-22 | 2017-12-22 | 合肥博微田村电气有限公司 | A kind of manufacture method of foil type winding transformer |
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CN106803456B (en) * | 2017-03-23 | 2020-03-31 | 江西特种变压器厂 | Foil type pouring winding with axially split single-side four-outlet-end and manufacturing method thereof |
CN106803456A (en) * | 2017-03-23 | 2017-06-06 | 江西特种变压器厂 | Foil cast winding and its manufacture method of a kind of four terminals of axial split one side |
CN107768115A (en) * | 2017-12-08 | 2018-03-06 | 吴江变压器有限公司 | A kind of loaded capacity-regulated transformer machine body structure |
CN108597801A (en) * | 2018-04-20 | 2018-09-28 | 江西特种变压器厂 | A kind of cast foil winding reducing eddy-current loss and its manufacturing method |
CN109285677A (en) * | 2018-11-20 | 2019-01-29 | 江苏光辉电力器材有限公司 | A kind of Combined power transformer iron core group |
CN109360723A (en) * | 2018-11-24 | 2019-02-19 | 福州天宇电气股份有限公司 | A kind of dry type axial direction double bundle transformer low-voltage coil structure and its production method |
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CN110828143A (en) * | 2019-11-22 | 2020-02-21 | 德阳新源电器有限责任公司 | Low-voltage coil of capacity and voltage regulating transformer |
CN113035561A (en) * | 2020-12-07 | 2021-06-25 | 广西电网有限责任公司电力科学研究院 | Oil pressure measurement-based transformer winding oil flow balance design method |
CN113035561B (en) * | 2020-12-07 | 2022-11-22 | 广西电网有限责任公司电力科学研究院 | Oil pressure measurement-based transformer winding oil flow balance design method |
CN113380539A (en) * | 2021-04-23 | 2021-09-10 | 武汉工程大学 | Coil structure and winding machine |
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Effective date of registration: 20170817 Address after: The 137300 Jilin Economic Development Zone of Zhenlai province Feihe Road No. 1999 Patentee after: Into the Electrical Technology Co., Ltd. Address before: 137300 Baicheng Province, Zhenlai County Industrial Zone, well-being of the East Road, No. 1999, No. Patentee before: Baicheng Electric Power Zhenlai Transformer Co., Ltd. |