CN106653314B - A kind of double cake-type winding structures - Google Patents
A kind of double cake-type winding structures Download PDFInfo
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- CN106653314B CN106653314B CN201611053194.7A CN201611053194A CN106653314B CN 106653314 B CN106653314 B CN 106653314B CN 201611053194 A CN201611053194 A CN 201611053194A CN 106653314 B CN106653314 B CN 106653314B
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The invention discloses a kind of double cake-type winding structures, it is related to transformer technology field, including the high-voltage winding and low pressure winding being wound on outside iron core column, low pressure winding is located on the outside of high-voltage winding, high-voltage winding and low pressure winding are formed by multigroup line cake is axially aligned, and every group of line cake is by reaching the standard grade cake and offline cake forms；Low pressure winding includes N group line cakes, the Vth group of cake of reaching the standard grade to IV group of line cake of N is identical with offline cake conducting wire axial height, the conducting wire axial height of Ith group and N group line cakes is all higher than the Vth group of conducting wire axial height to IV group of line cake of N, the II, the III, IV group and N III, N II, I group of line cake of N conducting wire axial height be respectively less than the Vth group of conducting wire axial height to IV group of line cake of N.The current density in low pressure winding upper and lower ends line cake can be reduced in this way, dropped low-temperature-rise, prevented low pressure winding hot-spot；So that conducting wire is fully used simultaneously, improve the fill factor of low pressure winding, improves stock utilization.
Description
Technical field
The present invention relates to transformer technology fields, more particularly to a kind of double cake-type winding structures.
Background technology
In large rectifier transformer and furnace transformer, since low-pressure side winding voltage is low, electric current is big, multi-channel parallel
Double pie windings are used widely, and each double pie windings are composed in parallel by 30-60 double cakes.Multigroup line cake is arranged in an axial direction
Row, every group of line cake are made of two line cakes of cake and offline cake of reaching the standard grade respectively, and there are one connector lug, each layer lines for installation on every group of line cake
Cake is formed by conducting wire coiling, and the number of turns and cross-sectional area of conducting wire are all equal, uniform.This coil when in use, due to become
Magnetic field intensity of the transformer coil on axial height residing for each line cake is different, and the electric current on each double cakes is also different.When coil work
When making, the magnetic field intensity residing for line cake close to internal layer is more than outer layer, thus, the current strength on interior layer line cake is more than outer layer,
Cause inner coil excessive by electric current, inner coil aging is fast, the problem of being easy to burn；In addition, due to winding overhang transverse direction
The influence of leakage field, in these double pie windings in parallel, the electric current in the double cakes in both ends is higher than electric current in the cakes of middle part pair.Therefore, double
The double cake Wen Sheng of first of pie winding both ends are much higher than the average temperature rising of winding, may result in the part of double pie windings
Overheat, jeopardizes the safe operation of transformer, reduces the service life of transformer.
Invention content
Technical problem to be solved by the invention is to provide a kind of double cakes that are simple and reasonable, can preventing hot-spot
Formula winding construction improves the operational reliability of transformer, is particularly suitable for large rectifier transformer and furnace transformer.
In order to solve the above technical problems, the technical solution used in the present invention is：
A kind of double cake-type winding structures, including it is wound on high-voltage winding and low pressure winding outside iron core column, the low pressure
Winding is arranged on the outside of high-voltage winding, and the high-voltage winding and low pressure winding are formed by multigroup line cake is axially aligned, every group
Line cake is by reaching the standard grade cake and offline cake forms；The low pressure winding includes N group line cakes, the Vth group of the low pressure winding to N- IV
Reach the standard grade cake and the offline cake conducting wire axial height all same of group line cake, reach the standard grade cake and the offline cake conducting wire of the Ith group and N group line cakes
Axial height is all higher than the Vth group of reach the standard grade cake and the offline cake conducting wire axial height to IV group of line cake of N-, the II, the III, IV group and
N- III, N- II, I group of line cake of N- reach the standard grade cake and offline cake conducting wire axial height is respectively less than the Vth group to IV group of line cake of N-
It reaches the standard grade cake and offline cake conducting wire axial height.
Preferably, the Vth group of the low pressure winding to IV group of line cake of N- reach the standard grade cake and offline cake conducting wire axial height
Be h, the Ith group and N group line cakes reach the standard grade cake and offline cake conducting wire axial height is 1.4h~2h, the II, the III, IV group and
N- III, N- II, I group of line cake of N- reach the standard grade cake and offline cake conducting wire axial height is 0.7h~0.9h.
Preferably, the axial height H of the low pressure winding is higher 30~60mm than high-voltage winding axial height H '.
Preferably, it is equipped at intervals with collets in the radial conductor spacing of the low pressure winding, oil is formed between adjacent collets
Road, the collets thickness are 5mm.
Preferably, the oil duct is arranged at one third in the radial of low pressure winding and from inside to outside.
Preferably, the collets include cardboard and cross-over block, and the cross-over block is pasted onto on cardboard, the cardboard
Thickness is 0.5mm, and the cross-over block thickness is 4.5mm.
Preferably, also it is equipped at intervals with stay between the low pressure winding and high-voltage winding.
Preferably, the stay thickness is 6~10mm.
It is using advantageous effect caused by above-mentioned technical proposal：By the Ith group and N group lines increasing low pressure winding
Reach the standard grade cake and the offline cake conducting wire axial height of cake, can reduce the current density in low pressure winding upper and lower ends line cake, reduce
Wen Sheng；By reducing reach the standard grade cake and the offline cake conducting wire axial height of the II, the III, IV group and N- III, I group of N- II, N- line cake,
Conducting wire can be made to be fully used, improve the fill factor of low pressure winding, improve stock utilization.The present invention has simple in structure
Rationally, advantage simple for production can prevent low pressure winding hot-spot, improve the operational reliability of transformer, improve transformation
The service life of device.Present invention is particularly suitable for large rectifier transformers and furnace transformer.
Description of the drawings
Fig. 1 is a kind of Longitudinal cross section schematic of double cake-type winding structures provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of low pressure winding；
In figure：1- iron core columns, 2- high-voltage windings, 3- low pressure windings, 4- reach the standard grade cake, the offline cakes of 5-, 6- collets.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with attached drawing and specific implementation
Example, the present invention is described in further detail.It should be appreciated that specific embodiment described herein is only used to explain this hair
It is bright, it is not intended to limit the present invention.
As shown in Figure 1, 2, a kind of double cake-type winding structures provided by the invention, including it is wound on the height outside iron core column 1
Winding 2 and low pressure winding 3 are pressed, the setting of the low pressure winding 3 is in 2 outside of high-voltage winding, the high-voltage winding 2 and low pressure winding 3
It is formed by multigroup line cake is axially aligned, every group of line cake is by reaching the standard grade cake 4 and offline cake 5 forms；The low pressure winding 3 includes
N group line cakes, the Vth group of the low pressure winding 3 to IV group of line cake of N- reach the standard grade cake 4 and 5 conducting wire axial height of offline cake it is homogeneous
Together, the Ith group and N group line cakes reach the standard grade cake 4 and 5 conducting wire axial height of offline cake is all higher than the Vth group to IV group of line cake of N-
Reach the standard grade 5 conducting wire axial height of cake 4 and offline cake, the II, the III, IV group and N- III, N- II, I group of line cake of N- reach the standard grade cake 4 and under
5 conducting wire axial height of line cake is respectively less than the Vth group of 5 conducting wire axial height of cake 4 and offline cake of reaching the standard grade to IV group of line cake of N-.
In one particular embodiment of the present invention, reach the standard grade cake 4 of the Vth group of the low pressure winding 3 to IV group of line cake of N-
Be h with 5 conducting wire axial height of offline cake, the Ith group and N group line cakes reach the standard grade cake 4 and 5 conducting wire axial height of offline cake is
1.4h~2h drops low-temperature-rise by increasing the current density in conducting wire axial height reduction end line cake；II, the III, IV group and
N- III, N- II, I group of line cake of N- reach the standard grade cake 4 and 5 conducting wire axial height of offline cake is 0.7h~0.9h, by reducing by the
II, the conducting wire axial height of III, IV group and N- III, I group of N- II, N- line cake, makes the conducting wire in low pressure winding obtain abundant profit
With improving the fill factor of winding, and improve stock utilization, reduce cost.
Further, the axial height H of the low pressure winding 3 is higher 30~60mm than 2 axial height H ' of high-voltage winding, can be with
Reduce the electric current in first double cake of low pressure winding end, to avoid the hot-spot of low pressure winding.
In a preferred embodiment of the invention, it is equipped at intervals with insulation in the radial conductor spacing of the low pressure winding 3
Block 6, forms oil duct between adjacent collets 6, and 6 thickness of the collets is 5mm.The temperature of low pressure winding can be reduced by the way that oil duct is arranged
It rises, extends winding service life.
Wherein, the radial size of the low pressure winding is 40-70mm, the oil duct be arranged in the radial of low pressure winding 3 and
At one third from inside to outside.It is at one third radial from inside to outside since low pressure winding temperature rises larger position, it can
Between collets are arranged at intervals on the conducting wire of this position, the logical oil cooling of oil duct is formed.
In one particular embodiment of the present invention, the collets 6 include cardboard and cross-over block, the cross-over block
It is pasted onto on cardboard, the calliper is 0.5mm, and the cross-over block thickness is 4.5mm.
In addition, being also equipped at intervals with stay between the low pressure winding 3 and high-voltage winding 2.Wherein, the stay thickness is 6
~10mm.Using the oil duct between stay high-voltage winding and the heat of low pressure winding center line cake are fully distributed, avoids
Hot-spot.
In conclusion the present invention have the advantages that it is simple and reasonable, simple for production, pass through increase low pressure winding the Ith
Reach the standard grade cake and the offline cake conducting wire axial height of group and N group line cakes, can reduce the electricity in low pressure winding upper and lower ends line cake
Low-temperature-rise drops in current density；By reduce the II, the III, IV group and N- III, N- II, I group of line cake of N- reach the standard grade cake and offline cake is led
Line axial height can make conducting wire be fully used, and improve the fill factor of low pressure winding, improve stock utilization；Pass through increasing
The axial height of big low pressure winding reduces the electric current in the line cake of low pressure winding end, low pressure winding it is radial from inside to outside three
Oil duct is set at/mono-, adds stay between high-voltage winding and low pressure winding, can avoid the hot-spot of winding, is made entire
Winding temperature is evenly distributed, and improves the operational reliability of transformer.
Principle and implementation of the present invention are described for specific case used herein, and above example is said
The bright method and its core concept for being merely used to help understand the present invention.It should be pointed out that for the ordinary skill of the art
, without departing from the principle of the present invention, can be with several improvements and modifications are made to the present invention for personnel, these improvement
It is also fallen within the protection scope of the claims of the present invention with modification.
Claims (6)
1. a kind of double cake-type winding structures, it is characterised in that：Including being wound on the external high-voltage winding (2) of iron core column (1) and low
Winding (3) is pressed, on the outside of high-voltage winding (2), the high-voltage winding (2) and low pressure winding (3) are equal for low pressure winding (3) setting
It is formed by multigroup line cake is axially aligned, every group of line cake is made of cake of reaching the standard grade (4) and offline cake (5)；The low pressure winding (3)
Including N group line cakes, the Vth group of cake of reaching the standard grade (4) to IV group of line cake of N- is identical with offline cake (5) conducting wire axial height, the Ith group
And the cake of reaching the standard grade (4) and offline cake (5) conducting wire axial height of N group line cakes are all higher than the Vth group of reaching the standard grade to IV group of line cake of N-
Cake (4) and offline cake (5) conducting wire axial height, the II, the III, IV group and N- III, N- II, I group of line cake of N- cake of reaching the standard grade (4) and
It is axial that offline cake (5) conducting wire axial height is respectively less than the Vth group of cake of reaching the standard grade (4) and offline cake (5) conducting wire to IV group of line cake of N-
Highly；
The cake of reaching the standard grade (4) and offline cake (5) conducting wire axial height of the Vth group of the low pressure winding (3) to IV group of line cake of N- are equal
For h, the cake of reaching the standard grade (4) and offline cake (5) conducting wire axial height of the Ith group and N group line cakes are 1.4h~2h, and the II, the III, IV
Group and N- III, N- II, the cake of reaching the standard grade (4) of I group of line cake of N- and offline cake (5) conducting wire axial height are 0.7h~0.9h；
The axial height H of the low pressure winding (3) is higher 30~60mm than high-voltage winding (2) axial height H ', and low pressure winding (3)
Upper end be less than the lower end of high-voltage winding (2) higher than the lower end of the upper end of high-voltage winding (2), low pressure winding (3).
2. double cake-type winding structures according to claim 1, it is characterised in that：The radial conducting wire of the low pressure winding (3)
It is equipped at intervals with collets (6) in gap, forms oil duct between adjacent collets (6), collets (6) thickness is 5mm.
3. double cake-type winding structures according to claim 2, it is characterised in that：The oil duct is arranged in low pressure winding (3)
Radial and one third from inside to outside at.
4. double cake-type winding structures according to claim 2, it is characterised in that：The collets (6) include cardboard and absolutely
Edge cushion block, the cross-over block are pasted onto on cardboard, and the calliper is 0.5mm, and the cross-over block thickness is 4.5mm.
5. double cake-type winding structures according to claim 1, it is characterised in that：The low pressure winding (3) and high-voltage winding
(2) stay is also equipped at intervals between.
6. double cake-type winding structures according to claim 5, it is characterised in that：The stay thickness is 6~10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611053194.7A CN106653314B (en) | 2016-11-25 | 2016-11-25 | A kind of double cake-type winding structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611053194.7A CN106653314B (en) | 2016-11-25 | 2016-11-25 | A kind of double cake-type winding structures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106653314A CN106653314A (en) | 2017-05-10 |
| CN106653314B true CN106653314B (en) | 2018-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611053194.7A Active CN106653314B (en) | 2016-11-25 | 2016-11-25 | A kind of double cake-type winding structures |
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| Country | Link |
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| CN (1) | CN106653314B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201383418Y (en) * | 2009-03-31 | 2010-01-13 | 云南通变电器有限公司 | Double-cake coil formed by wires with unequal cross sections |
| CN202736664U (en) * | 2012-07-27 | 2013-02-13 | 中国西电电气股份有限公司 | High-current low-voltage coil for controlling temperature rise of hot point and transformer with same |
| CN203444932U (en) * | 2013-07-22 | 2014-02-19 | 国家电网公司 | Winding of dry type transformer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150109081A1 (en) * | 2013-10-21 | 2015-04-23 | Hammond Power Solutions, Inc. | Cast coil assembly with fins for an electrical transformer |
-
2016
- 2016-11-25 CN CN201611053194.7A patent/CN106653314B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201383418Y (en) * | 2009-03-31 | 2010-01-13 | 云南通变电器有限公司 | Double-cake coil formed by wires with unequal cross sections |
| CN202736664U (en) * | 2012-07-27 | 2013-02-13 | 中国西电电气股份有限公司 | High-current low-voltage coil for controlling temperature rise of hot point and transformer with same |
| CN203444932U (en) * | 2013-07-22 | 2014-02-19 | 国家电网公司 | Winding of dry type transformer |
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| Publication number | Publication date |
|---|---|
| CN106653314A (en) | 2017-05-10 |
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