CN106373756B - A kind of resistance to shorting transformer and its preparation technology - Google Patents
A kind of resistance to shorting transformer and its preparation technology Download PDFInfo
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- CN106373756B CN106373756B CN201610967590.4A CN201610967590A CN106373756B CN 106373756 B CN106373756 B CN 106373756B CN 201610967590 A CN201610967590 A CN 201610967590A CN 106373756 B CN106373756 B CN 106373756B
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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
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/323—Insulation between winding turns, between winding layers
-
- 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
- H01F27/2866—Combination of wires and sheets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- 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
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Insulating Of Coils (AREA)
- General Induction Heating (AREA)
Abstract
The present invention is more particularly directed to a kind of resistance to shorting transformer and its preparation technology.The resistance to shorting transformer, including A phase coils, B phase coils, C phase coils, include iron core, low-voltage coil, high-tension coil, low-voltage coil, high-tension coil is enclosed on outside iron core, interior insulation cardboard, low-voltage coil wire, layer insulation, end circle is integral structure, the wire of high-tension coil, layer insulation, end circle is integral structure, low-voltage coil, the end circle of high-tension coil is outer to set gradually cushion block, folder, low-voltage coil, high-tension coil passes through round log rod stretching with iron core, A phase coils, B phase coils, gap fagging stretching between C phase coils, the A phase coils at both ends, insulation board is set outside C phase coils, insulation board is connected by pushing up nail with folder.The program makes distribution transforming transformer have the ability for meeting resistance to shorting, effectively prevents transformer winding buckling deformation in short circuit in the case of no increase cost of raw material, and for production, manufacturing firm creates more profit margins.
Description
（One）Technical field
The present invention relates to transformer, more particularly to a kind of resistance to shorting transformer and its preparation technology.
（Two）Background technology
At this stage, as Guo Wang companies are to the requirement more and more higher of power network distribution transforming transformer quality, resistance to shorting will be met
Ability, traditional structure is that Transformer Winding is round structure, and has formed glass steel cylinder inside low pressure winding, and is also had
Pressing plate thick 20mm, could be more high than conventional common ellipsoid distribution transforming transformer by short circuit, cost（Typically will height
15%）, profit margin is occupied significantly.
It is well known that mechanical force is acted between current-carrying parallel wire is held, if the power direction phase in wire
Together, secondary power makes two wires attract each other, if current in wire is in opposite direction, the mechanical force between wire is mutually exclusive.At both
In the case of, each wire unit length（Cm the active force on) is equal to：（kg/cm）In formulaFor the electric current in wire
（Instantaneous value）, and d is the distance between wire.Winding whole wire turn power with same current is mutually close to, in the effect of this power
Under, girth of the winding as trying hard to diminution section itself.In rated current power next time and little, but when transformer happens suddenly
When short-circuit, the power will be increased dramatically, and it is changed by the square law of short circuit current and rated current ratio.
What the active force between transformer first winding and secondary winding excluded each other；Because the electricity in two windings
Flowing phase difference, their electric current is always opposite close to 180 degree, therefore at each moment.Act on composite force total on winding etc.
In acting on the power sum in each wire.Under rated current state, the repulsive force between winding is little, but in short circuit, this
Power will increase toTimes.If do not taken appropriate measures, this power is possible to that winding unstability can be caused, and causes winding
Destroy.
The sense of current is opposite in double winding, if the low pressure winding sense of current is outside, the high pressure winding sense of current to
In, according to the right-hand rule, their leakage magnetic flux（It is represented by dashed line in figure）It is inevitable upward between two windings, as shown in Figure 1.
For convenience, leakage magnetic flux can be divided into two components：Axial leakage magnetic flux and radial leakage magnetic flux.Axial leakage magnetic flux is
Vertically upward, radial leakage magnetic flux is due to that winding upper end leakage magnetic flux outwards dissipates, and generation is said in lower end to gathering on the inside of winding
Horizontal component.From the right-hand rule：Axial leakage magnetic flux produces radial electromagnetic force, and radial leakage field produces axial electromagnetic force, such as
Shown in Fig. 2.Axial leakage magnetic flux makes outside high pressure winding produce outside radial tension force, i.e. high pressure winding external diameter will become big, surrounding
Direction Tensile stress, winding conducting wire must endure as this power；Conversely, axial leakage magnetic flux makes inner side low pressure winding produce inwardly
Radial pressure, i.e. low pressure winding internal diameter direction compressed, design with to be prevented during manufacture the winding in short circuit unstability and become
Shape.
（Three）The content of the invention
The present invention is in order to make up the deficiencies in the prior art, there is provided a kind of resistance to shorting transformer and its preparation technology, this hair
It is bright three-phase coil is turned into " steel body " structure by special process and structure；Cardboard and round log rod are used between coil and iron core
Stretching, low-voltage coil is prevented to be shunk inward by during short-circuit force, so as to sustain the impact of short-circuit force.
The present invention is achieved through the following technical solutions：
A kind of resistance to shorting transformer, including A phase coils, B phase coils, C phase coils, it is characterized in that：A phase coils, B
Phase coil, C phase coils include iron core, low-voltage coil, high-tension coil, and low-voltage coil, high-tension coil are enclosed on outside iron core, low-voltage line
The conductive contact of the interior insulation cardboard side brush coating layer of circle, the interior insulation cardboard side and low-voltage coil, low-voltage coil conductor layer it
Between layer insulation, end circle use full glue cable paper, interior insulation cardboard, low-voltage coil wire, layer insulation, end circle are one whole
Body structure, the layer insulation between the conductor layer of high-tension coil use full glue cable paper or big water chestnut lattice point gummed paper, high-tension coil
End circle both sides brush coating layer, wire, layer insulation, the end circle of high-tension coil are integral structure, low-voltage coil, the end of high-tension coil
Circle is outer to set gradually cushion block, folder, and low-voltage coil, high-tension coil and iron core pass through round log rod stretching, A phase coils, B phase coils, C
Gap fagging stretching between phase coil, A phase coils, the C phase coils at both ends set insulation board outside, and insulation board, which passes through, pushes up nail and folder
Part is connected.
After complete, brush coating layer is simultaneously wound the layer conductor of high-tension coil first with without latitude band.
High-tension coil outermost is wound without latitude band.
Insulation board is arc, by PET steel bands by insulation board and A phase coils, B phase coils, C phase coils it is tired tie up into one it is whole
Body.
Low-voltage coil wire is copper foil.
Glue-line is 1411 glue-lines.
First head and the merogenesis lead of high-tension coil is tight with wood strip folder clamping.
The lead two ends copper bar of low-voltage coil is connected with insulated terminal, and it is firm to be connected to a fixed with folder.
A kind of preparation technology of resistance to shorting transformer, comprises the following steps：A phase coils, B phase coils, C phase coil low-voltage lines
The layer insulation and end circle of circle use full glue cable paper, after the completion of coiling, by being pressed, heating, make on full glue cable paper
Glue melts to stick together with the wire of low-voltage coil, forms an entirety；Layer insulation between the conductor layer of high-tension coil is adopted
With full glue cable paper or big water chestnut lattice point gummed paper, after the completion of coiling, the end circle both sides brush coating layer of high-tension coil is solid through being pressed, heating
Change, end circle is become an entirety；High-voltage coil and low-voltage coil is enclosed on iron core, with round log rod, coil and iron core stretching, per phase
Gap fagging stretching between coil, A phase coils, the C phase coils at both ends set insulation board outside, and insulation board, which passes through, pushes up nail and folder
It is connected.
Wherein, heating is divided into heating, insulation, 3 stages of cooling, and temperature is raised to 120 DEG C of holding 5-8 hours, then cooled
To 110 DEG C of holding 2-5 hours, then cooling is come out of the stove.
The beneficial effects of the invention are as follows：The present invention on the basis of existing oval conventional transformer by special process method,
Layer insulation uses full glue cable paper, end turn brush coating, allows end circle to turn into an entirety；Low-voltage coil is using paper tinsel around coil
Coil, iron core, folder is set to turn into " steel body " structure, and small volume with the measure such as round log rod stretching, alternate stretching between iron core.Should
Scheme makes distribution transforming transformer have the ability for meeting resistance to shorting, effectively prevents change in the case of no increase cost of raw material
Depressor winding buckling deformation in short circuit, for production, manufacturing firm creates more profit margins, makes product competing with more market
Strive power.
（Four）Brief description of the drawings
The present invention is further illustrated below in conjunction with the accompanying drawings.
Accompanying drawing 1 is front view of the invention；
Accompanying drawing 2 is the right view of accompanying drawing 1；
Accompanying drawing 3 is the top view of accompanying drawing 1；
In figure, 1, folder；2nd, iron core；3rd, cushion block；4th, end circle；5th, high-tension coil；6th, low-voltage coil；7th, insulation board；8th, push up
Nail；9th, fagging；10th, round log rod.
（Five）Embodiment
Accompanying drawing is a kind of specific embodiment of the invention.The embodiment includes A phase coils, B phase coils, C phase coils, and it is special
Different part is：A phase coils, B phase coils, C phase coils include iron core 2, low-voltage coil 6, high-tension coil 5, low-voltage coil 6,
High-tension coil 5 is enclosed on outside iron core 2, the interior insulation cardboard side brush coating layer of low-voltage coil 6, the interior insulation cardboard side and low-voltage coil
6 conductive contact, layer insulation, end circle 4 between the conductor layer of low-voltage coil 6 use full glue cable paper, interior insulation cardboard, low
The wire of line ball circle 5, layer insulation, end circle 4 are integral structure, and the layer insulation between the conductor layer of high-tension coil 5 is using complete
Glue cable paper or big water chestnut lattice point gummed paper, the end circle both sides brush coating layer of high-tension coil 5, the wire of high-tension coil 5, layer insulation, end
Circle is integral structure, and low-voltage coil 6, the end circle of high-tension coil 5 set gradually cushion block 3, folder 1, low-voltage coil 6, high pressure outside
Coil 5 and iron core 2 are by the stretching of round log rod 10, the gap stretching of fagging 9, both ends between A phase coils, B phase coils, C phase coils
A phase coils, insulation board 7 is set outside C phase coils, insulation board 7 is connected by pushing up nail 8 with folder 1.
The layer conductor of high-tension coil 5 first can be wound with brush coating layer and with without latitude band after complete.
The outermost of high-tension coil 5 can wind no latitude band.
Insulation board 7 is arc, by PET steel bands is stranded and ties up into one insulation board 7 and A phase coils, B phase coils, C phase coils
It is overall.
The wire of low-voltage coil 6 is copper foil.
Glue-line is 1411 glue-lines.
First head and the merogenesis lead of high-tension coil 5 is tight with wood strip folder clamping.
The lead two ends copper bar of low-voltage coil 6 is connected with insulated terminal, and it is firm to be connected to a fixed with folder 1.
Resistance to shorting transformer technique of the present invention is specially：
1. in terms of coiling
（1）, low pressure winding using paper tinsel around by the glue of one side brush of low pressure winding interior insulation cardboard 1411, the side connects with copper foil
Touch, the insulation of low pressure winding interlayer and end insulation use full glue cable paper, and purpose is in the laggard stove heat of coil press mounting, on full gummed paper
Glue fusing blended with copper foil, such interior insulation cardboard, copper foil, layer insulation, hold insulation become an overall structure；
（2）, high-tension coil 5 to wind consolidation, prevent the wire movement in short circuit, cause winding buckling deformation, wherein, high-tension coil 5
First layer conductor can brush one layer of glue and, around one layer, increase intensity with without latitude band after complete；（3）, insulate between high-voltage winding layer and adopt
With big water chestnut lattice point gummed paper or full glue cable paper, big rib lattice point gummed paper goes out greatly perhaps than the content and coverage rate of common rib lattice point gummed paper glue
It is more, preferably it can be blended in heating with high-voltage conducting wires as an entirety；（4）, the glue of two side brush of high-pressure side circle 1411, when around
Group is pressed into after stove heat solidification, and high-pressure side circle becomes an entirety, and equivalent to one " pressing plate " compresses wire；（5）, in height
Press winding outermost around two layers without latitude band, high pressure winding outside diametral force during limiting short circuit；（6）, press fitting go forward side by side stove heat,
Coil is set to turn into an overall structure, heating is divided into heating, insulation, 3 stages of cooling, and temperature is raised to 120 DEG C and keeps 5-8 small
When, 110 DEG C of holding 2-5 hours are then cooled to, then cooling is come out of the stove, and preferable temperature is raised to 120 degree and kept for 6 hours, then drops
Temperature is kept for 4 hours to 110 degree, and then cooling is come out of the stove, and the glue on insulating part fully bonds with wire, coil is turned into an entirety
" steel " structure.
2. in terms of assembling
（1）, with round log rod 10 and fagging 9 by the gap stretching between coil and iron core 2, iron core 2 is changed into low pressure winding
Skeleton, prevent low pressure winding winding contraction distortion inward when by short-circuit force, so as to solve low pressure winding in short circuit
Destruction of the inside diametral force to winding.
（2）, to prevent the tensile force of high pressure winding when by short circuit outward, prevent the external diameter of high-tension coil 6 from becoming big, use paper
Plate is alternate stretching, high pressure winding A, C phase outside plus arc（Insulation board）, arc using be laminated it is wooden does, and with PET steel
Arc and winding are stranded by band ties up into an entirety（Other structures measure can also be taken to be integrally formed three-phase coil）Work as height
Press winding can be stretched out by tensile force wire outward when by short-circuit force, stretch high-voltage conducting wires outward
Space（It is alternate）Stretching, width outside arc bundle with PET steel bands, and length direction whether there is the winding of latitude band, therefore
The space that wire does not stretch out, therefore will not buckling deformation.
（3）, because low pressure using paper tinsel around structure, axial force is not too much big, and coil has become a steel body knot
Structure, using conventional cushion block structure, axial force during with regard to short circuit can be sustained.
3. in terms of lead
（1）, the first head of high pressure and merogenesis lead it is tight with wood strip folder clamping, prevent that power is acted on winding on wire during short circuit.
（2）, low-voltage lead two ends copper bar connected with insulated terminal, and it is firm to be connected to a fixed in folder.
4. Case Experiments On A number innings
This scheme is used for the transformer of an oval structure of S13-200/10, the short circuit experiment data done are as follows below：
Table 1：Short-circuit test current data
Table 2：The test data of short-circuit test tap position 1
Table 3：The test data of short-circuit test tap position 3
Table 4：The test data of short-circuit test tap position 5
Claims (1)
1. a kind of resistance to shorting transformer, including A phase coils, B phase coils, C phase coils, A phase coils, B phase coils, C phase coils are equal
Including iron core, low-voltage coil, high-tension coil, low-voltage coil, high-tension coil are enclosed on outside iron core, it is characterised in that：Low-voltage coil
The conductive contact of interior insulation cardboard side brush coating layer, the interior insulation cardboard side and low-voltage coil, between low-voltage coil conductor layer
Layer insulation, end circle use full glue cable paper, and interior insulation cardboard, low-voltage coil wire, layer insulation, end circle are integral knot
Structure, the layer insulation between the conductor layer of high-tension coil use full glue cable paper or big water chestnut lattice point gummed paper, the end circle of high-tension coil
Both sides brush coating layer, wire, layer insulation, the end circle of high-tension coil are integral structure, and low-voltage coil, the end circle of high-tension coil are outer
Cushion block, folder are set gradually, low-voltage coil, high-tension coil and iron core pass through round log rod stretching, A phase coils, B phase coils, C phase lines
Gap fagging stretching between circle, A phase coils, the C phase coils at both ends set insulation board outside, and insulation board, which passes through, pushes up nail and folder phase
Even；
After complete, brush coating layer is simultaneously wound the layer conductor of high-tension coil first with without latitude band；
High-tension coil outermost is wound without latitude band；
Insulation board is arc, by PET steel bands is stranded and ties up into an entirety insulation board and A phase coils, B phase coils, C phase coils；
Low-voltage coil wire is copper foil；
Glue-line is 1411 glue-lines；
First head and the merogenesis lead of high-tension coil is tight with wood strip folder clamping；
The lead two ends copper bar of low-voltage coil is connected with insulated terminal, and it is firm to be connected to a fixed with folder；
The preparation technology of the resistance to shorting transformer, comprises the following steps：A phase coils, B phase coils, C phase coil low-voltage coils
Layer insulation and end circle use full glue cable paper, after the completion of coiling, by being pressed, heating, melt the glue on full glue cable paper
Change and sticked together with the wire of low-voltage coil, form an entirety；Layer insulation between the conductor layer of high-tension coil is using complete
Glue cable paper or big water chestnut lattice point gummed paper, after the completion of coiling, the end circle both sides brush coating layer of high-tension coil, through being pressed, being heating and curing, make
End circle becomes an entirety；High-voltage coil and low-voltage coil is enclosed on iron core, with round log rod, coil and iron core stretching, per phase coil
Between gap fagging stretching, insulation board is set outside the A phase coils at both ends, C phase coils, insulation board, which passes through, pushes up nail and folder phase
Even；
Heating is divided into heating, insulation, 3 stages of cooling, and temperature is raised to 120 DEG C of holding 5-8 hours, then cools to 110 DEG C of guarantors
2-5 hours are held, then cooling is come out of the stove.
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| CN201610967590.4A CN106373756B (en) | 2016-10-31 | 2016-10-31 | A kind of resistance to shorting transformer and its preparation technology |
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| CN201610967590.4A CN106373756B (en) | 2016-10-31 | 2016-10-31 | A kind of resistance to shorting transformer and its preparation technology |
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| CN106373756B true CN106373756B (en) | 2018-01-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107863247A (en) * | 2017-11-13 | 2018-03-30 | 江苏宏源电气有限责任公司 | A kind of preparation method for the high-tension coil for improving anti-sudden short circuit ability |
| CN110186775B (en) * | 2019-06-26 | 2022-05-27 | 哈尔滨理工大学 | Method and device for simulating radial stress of winding insulation during short circuit of transformer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5485327A (en) * | 1977-12-21 | 1979-07-06 | Fuji Electric Co Ltd | Winding for electric apparatus |
| CN105097234A (en) * | 2015-08-13 | 2015-11-25 | 王永法 | Anti-short-circuit amorphous-alloy oil-immersed transformer and preparation method thereof |
| CN106057441A (en) * | 2016-08-18 | 2016-10-26 | 吴江变压器有限公司 | Oil-immersed transformer body reinforcement structure capable of enhancing short-circuit withstand ability |
| CN206163284U (en) * | 2016-10-31 | 2017-05-10 | 山东华驰变压器股份有限公司 | Anti short circuit transformer |
-
2016
- 2016-10-31 CN CN201610967590.4A patent/CN106373756B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5485327A (en) * | 1977-12-21 | 1979-07-06 | Fuji Electric Co Ltd | Winding for electric apparatus |
| CN105097234A (en) * | 2015-08-13 | 2015-11-25 | 王永法 | Anti-short-circuit amorphous-alloy oil-immersed transformer and preparation method thereof |
| CN106057441A (en) * | 2016-08-18 | 2016-10-26 | 吴江变压器有限公司 | Oil-immersed transformer body reinforcement structure capable of enhancing short-circuit withstand ability |
| CN206163284U (en) * | 2016-10-31 | 2017-05-10 | 山东华驰变压器股份有限公司 | Anti short circuit transformer |
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