CN209216746U - A kind of inverse Scott Transformer - Google Patents
A kind of inverse Scott Transformer Download PDFInfo
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- CN209216746U CN209216746U CN201920149888.3U CN201920149888U CN209216746U CN 209216746 U CN209216746 U CN 209216746U CN 201920149888 U CN201920149888 U CN 201920149888U CN 209216746 U CN209216746 U CN 209216746U
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Abstract
This application provides a kind of inverse Scott Transformer, including bracket, the M being set on bracket becomes iron core and T becomes iron core；M becomes iron core and is externally provided with M change high-tension coil and M change low-voltage coil, and T change iron core is externally provided with T change high-tension coil and T becomes low-voltage coil；M becomes high-tension coil and connects with T change high-tension coil；The winding that M becomes low-voltage coil includes the first winding, the second winding, the tertiary winding and the 4th winding；The tertiary winding is wound in outside the first winding, outside the 4th winding technique and the second winding；First winding and the 4th winding around on the contrary, the second winding and the 4th winding around to opposite；First winding is connect with the 4th winding, and the tertiary winding is connect with the second winding；The number of turns of four windings is identical.The M winding for becoming low-voltage coil is divided into four sections, one section of two sections of windings of same phase carries out standard transposition on the outside of coil, and in first layer to the second layer for one section on the inside of coil, it is ensured that the two-phase winding length that M becomes in low-voltage coil is the same, to reach resistance balance.
Description
Technical field
The utility model relates to transformer technology field, especially a kind of inverse Scott Transformer.
Background technique
Electric railway traction power supply system mainly have direct-furnish mode and auto-transformer (Auto Transformer,
AT) power supply mode.The shortcomings that direct-furnish mode is that power supply distance is short, electric split-phase quantity is more, power supply quality is poor；AT power supply mode can be with
Supply voltage is improved, extends power supply distance, reduces line loss, effectively weakens interference of the ac tracting network to communication line,
There are some advantages in big supplying charge face.
Inverse Scott Transformer is a kind of special transformer, can be by electric (two phases of the two-phase of power supply (abbreviation road network)
90 ° of potential difference single-phase) become three-phase electricity, i.e. traction institute's equipment side (abbreviation institute side), inverse Scott Transformer is by two lists
Phase transformer composition, is connected to the secondary of another transformer for the end of the low pressure winding (i.e. secondary winding) of a transformer
The center of winding can form the three-phase secondary winding of T-type connection.Two single-phase transformers being coupled in this way can be used as two-phase
Become the transformer of three-phase, the former the abbreviation T in this two transformers becomes, and the latter's abbreviation M becomes.
Inverse Scott Transformer is suitble to traction substation of electric railway, switching station, AT institute, subregion institute, road on railway
Net side tractive transformer 27.5kV voltage becomes 400V or 230V voltage.Interior lighting, control are provided for traction substation
The power supplys such as protection, blower, operating mechanism.
But with continuously improving for the development of urban transportation and technology, the electric current of inverse Scott Transformer output is wanted
Ask higher and higher, the prior art inverse Scott Transformer biggish to capacity is when M becomes low-voltage coil and uses mostly with conducting wire coiling
There can be M power transformation and hinder unbalanced problem, and then lead to three-phase current unbalance, not be able to satisfy power reguirements.
Utility model content
The purpose of utility model of the utility model is: for the prior art, there are M to become low-voltage coil using mostly with conducting wire
When coiling the problem of resistance unbalance, a kind of inverse Scott Transformer is provided.
To achieve the goals above, the technical solution adopted in the utility model are as follows:
A kind of inverse Scott Transformer, including bracket, the M being set on bracket becomes iron core and T becomes iron core；The M becomes iron
Core is externally provided with M and becomes high-tension coil and M change low-voltage coil, and the T becomes iron core and is externally provided with T change high-tension coil and T change low-voltage coil；Institute
M change high-tension coil is stated to connect with T change high-tension coil；The M become low-voltage coil winding include the first winding, second around
Group, the tertiary winding and the 4th winding；First winding technique becomes the upper semisection of iron core, second winding technique in the M
Become the lower semisection of iron core with the M, the tertiary winding is wound in outside first winding, the 4th winding technique with it is described
Outside second winding；First winding and the 4th winding around on the contrary, second winding and the 4th winding around to
On the contrary；One end of first winding is connect with one end of the 4th winding, one end of the tertiary winding and described second
One end of winding connects, and the other end of the other end of second winding and the 4th winding becomes low-voltage coil with the T
Connection；First winding, the second winding, the tertiary winding, the number of turns of the 4th winding are identical.
As a preferred embodiment of the present invention, it includes first layer winding, second layer winding and that the T, which becomes low-voltage coil,
Three layers of winding, wherein first layer winding around to third layer winding around to identical, first layer winding around to the second layer
Winding around on the contrary, the first layer winding and the second layer windings in series, the third layer winding and the second layer
The d ' of d and the third layer winding after N point ground connection after winding connection, second winding and the 4th winding connection are even
It connects.By the way that T change low-voltage coil is divided into three layers of winding, the junction of second layer winding and third layer winding is grounded, by the
The d point that the d ' and M of three layers of winding become low-voltage coil is connect, to change the amplitude and phase of the electric current of b phase and c phase.
As a preferred embodiment of the present invention, the T becomes first layer winding, second layer winding and the third of low-voltage coil
The number of turns of layer winding is identical.The identical balance to guarantee output electricity of the number of turns of three layers of winding.
As a preferred embodiment of the present invention, the turn ratio of first winding and first layer winding is 13:15.It presses
This turn ratio coiling M becomes low-voltage coil and T becomes low-voltage coil and can to become by inverse Scott Transformer provided by the present application
Three-phase electricity amplitude after pressure is equally big, and the angle between three-phase electricity meets 120 ° of requirements.
In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are: by the way that M is lower pressure
The winding of coil is divided into four sections, wherein one section of two sections of windings of same phase on the inside of coil one section on the outside of coil, and first
Layer carries out standard transposition to the second layer, and the two-phase winding length for ensuring that M becomes in low-voltage coil in this way is the same, so that it is flat to reach resistance
Weighing apparatus.
Detailed description of the invention
Fig. 1 is inverse Scott Transformer wiring schematic diagram；
Fig. 2 be inverse Scott Transformer provided by the present application M become low-voltage coil around to schematic diagram one；
Fig. 3 be inverse Scott Transformer provided by the present application M become low-voltage coil around to schematic diagram two；
Fig. 4 be inverse Scott Transformer provided by the present application T become low-voltage coil around to schematic diagram；
Fig. 5 is the polar plot of inverse Scott Transformer three-phase electricity provided by the present application.
Marked in the figure: 22-M becomes low-voltage coil, the first winding of 221-, the second winding of 222-, the 223- tertiary winding, 224- the
Four windings, 32-T become low-voltage coil, 321- first layer winding, 322- second layer winding, 323- third layer winding.
Specific embodiment
With reference to the accompanying drawing, the utility model is described in detail.
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Utility model is not used to limit the utility model.
In the description of the present invention, it should be understood that term " longitudinal direction ", " transverse direction ", "upper", "lower", " preceding ",
The orientation or positional relationship of the instructions such as " rear ", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is based on attached
Orientation or positional relationship shown in figure, is merely for convenience of describing the present invention and simplifying the description, rather than indication or suggestion
Signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this
The limitation of utility model.
In the description of the present invention, unless otherwise specified and limited, it should be noted that term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be mechanical connection or electrical connection, the company being also possible to inside two elements
It is logical, it can be directly connected, can also indirectly connected through an intermediary, for the ordinary skill in the art, it can
To understand the concrete meaning of above-mentioned term as the case may be.
As shown in Figures 2 to 4, inverse Scott Transformer provided by the present application, including bracket, the M being set on bracket become
Iron core and T become iron core；The M becomes iron core and is externally provided with M change high-tension coil and M change low-voltage coil 22, and the T becomes iron core and is externally provided with T
Become high-tension coil and T becomes low-voltage coil 32.The M becomes high-tension coil and connects with T change high-tension coil；The M is lower crimping
The winding of circle 22 includes the first winding 221, the second winding 222, the tertiary winding 223 and the 4th winding 224.
As shown in Figures 2 and 3, first winding 221 is wound in the upper semisection that the M becomes iron core, second winding
222 coilings and the M become the lower semisection of iron core, and the tertiary winding 223 is wound in outside first winding 221, and the described 4th
Outside 224 coiling of winding and second winding 222.First winding 221 is with the 4th winding 224 around on the contrary, described
Second winding 222 and the 4th winding 224 are around to opposite；One end of first winding 221 and the 4th winding 224
One end connection, one end of the tertiary winding 223 connect with one end of second winding 222, second winding 222
The other end of the other end and the 4th winding 224 becomes low-voltage coil 32 with the T and connect；First winding 221,
Two windings 222, the tertiary winding 223, the number of turns of the 4th winding 224 are identical.It is arranged to one by the winding that M is become low-voltage coil 22
Outside interior one, thus the resistance balance of b and c phase, thus b phase current and c phase current balance.
In order to enable the angle after transformer transformation between every two-phase electricity of three phase mains meets substation facilities
It needs the winding for just needing to change T type transformer coil to make three-phase electric equilibrium with this, is wrapped as shown in figure 4, the T becomes low-voltage coil 32
Include three layers of winding, the number of turns of every layer of winding is identical, wherein first layer around to third layer around to identical, second
Around to the second layer around on the contrary, the first layer winding 321 connects with the second layer winding 322, the third layer around
Group 323 is connected with the second layer winding 322.In order to enable after transformer transformation between every two-phase electricity of three phase mains
Angle meets 120 °, by the second layer winding 322 and third after M the second winding 222 become and the series connection of the 4th winding 224 with T change
The connection of layer 323 junction of winding.In order to enable the current amplitude of the three-phase electricity after transformation is the same, therefore M becomes low-voltage coil 22
First winding 221, the second winding 222, the tertiary winding 223, the number of turns of the 4th winding 224 it is identical, M becomes low-voltage coil 22
The first winding 221, the second winding 222, the tertiary winding 223, the 4th winding 224 become the first layer winding of low-voltage coil 32 with T
321 turn ratio is 13:15.
Embodiment one
M becomes the coiling of the first winding 221, the second winding 222, the tertiary winding 223, the 4th winding 224 of low-voltage coil 22
The number of turns is 26 circles, the first winding 221 and the series connection of the 4th winding 224, and the first winding 221 is according to clockwise direction coiling, and the 4th
Winding 224 is according to counter clockwise direction coiling.Second winding 222 and the tertiary winding 223 are connected, and the second winding 222 is according to clockwise
Direction coiling, the tertiary winding 223 is according to counter clockwise direction coiling.Therefore M becomes the number of turns of b phase in low-voltage coil 22 as 52
The number of turns of circle, c phase is 52 circles, and by method for winding provided by the present application, b phase is as the winding perimeter of c phase, thus b
It is mutually identical with the resistance of c phase, the second winding 222 of the 4th winding 224 of b phase and c phase is connected, tie point d.
T become low-voltage coil 32 three layers of winding, most the inside one layer of winding, that is, first layer winding 321 according to clockwise direction to
Under around, second layer winding 322 according to counter clockwise direction upwards about first layer winding 321 and second layer winding 322 are connected, third
Layer winding 323 is consistent with 321 direction of winding of first layer winding, and the number of turns of every layer of winding is 30 circles.Second winding 222 and third around
The M d point for becoming low-voltage coil 22 is connect, then first layer winding by the tie point N point ground connection of group 223 with the T d ' for becoming low-voltage coil 32
321 outlet is a phase, and the outlet of the first winding 221 is b phase, and the outlet of the tertiary winding 223 is c phase.
The M of transformer is become into high-tension coil and T becomes high-tension coil series connection, i.e., is connect the C in Fig. 1 with D, as shown in figure 5,
If M becomes high-tension coil and T becomes the electric current of high-tension coil as IA, the angle of biphase current is 90 °, will be from the M of road network electricity side-draw
Become high-tension coil and T becomes high-tension coil series connection, after inverse Scott Transformer transformation provided by the present application, M becomes high-tension coil
For turn ratio with M change low-voltage coil 22 into K, T becomes the turn ratio of high-tension coil and T change low-voltage coil 32 as K, therefore passes through this Shen
The electric current of the side T low-voltage coil only passes through T change 32 first layer winding of low-voltage coil after the inverse Scott Transformer transformation that please be provided
321 and second layer winding 322 flow out electric current Ia, size isThe electric current of T change 32 third layer winding 323 of low-voltage coil
I″cWith I "bForBecome the electric current I ' of low-voltage coil 22 by McWith I 'bSize isI′cWith I 'bDirection phase
Anti- and and IaVector angle be 90 °, due to M become low-voltage coil 22 b phase and c phase connect with the N point that T becomes after form zero potential
Point, IbEqual to I 'bWith I "bVector addition, IcEqual to I 'cWith I "cVector addition.Last IbAnd IcAmplitude beI.e.
That is IbAmplitudeIcAmplitudeAfter vector superposed
Ia、 IbAnd IcBetween angle be 120 °, to meet the amplitude of three-phase electricity and phase angle balances.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (4)
1. a kind of inverse Scott Transformer, which is characterized in that including bracket, the M being set on bracket becomes iron core and T becomes iron core；
The M becomes iron core and is externally provided with M change high-tension coil and M change low-voltage coil (22), and the T becomes iron core and is externally provided with T change high-tension coil and T
Become low-voltage coil (32)；The M becomes high-tension coil and connects with T change high-tension coil；The M becomes the winding of low-voltage coil (22)
Including the first winding (221), the second winding (222), the tertiary winding (223) and the 4th winding (224)；First winding
(221) it is wound in the upper semisection that the M becomes iron core, the second winding (222) coiling and the M become the lower semisection of iron core, institute
It states the tertiary winding (223) and is wound in first winding (221) outside, the 4th winding (224) coiling and second winding
(222) outside；First winding (221) and the 4th winding (224) are around on the contrary, second winding (222) and described
4th winding (224) is around to opposite；One end of first winding (221) is connect with one end of the 4th winding (224), institute
The one end for stating the tertiary winding (223) is connect with one end of second winding (222)；First winding (221), the second winding
(222), the tertiary winding (223), the number of turns of the 4th winding (224) are identical.
2. inverse Scott Transformer according to claim 1, which is characterized in that it includes that the T, which becomes low-voltage coil (32),
One layer of winding (321), second layer winding (322) and third layer winding (323), wherein first layer winding (321) around to
Three layers of winding (323) around to identical, first layer winding (321) around to second layer winding (322) around on the contrary, described
First layer winding (321) is connected with the second layer winding (322), the third layer winding (323) and the second layer winding
(322) tie point ground connection, the tie point of second winding (222) and the 4th winding (224) and the third layer around
Group (323) connection.
3. inverse Scott Transformer according to claim 2, which is characterized in that the T becomes the first of low-voltage coil (32)
Layer winding (321), second layer winding (322) are identical with the number of turns of third layer winding (323).
4. inverse Scott Transformer according to claim 3, which is characterized in that first winding (221) and first layer
The turn ratio of winding (321) is 13:15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920149888.3U CN209216746U (en) | 2019-01-29 | 2019-01-29 | A kind of inverse Scott Transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920149888.3U CN209216746U (en) | 2019-01-29 | 2019-01-29 | A kind of inverse Scott Transformer |
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| CN209216746U true CN209216746U (en) | 2019-08-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109637791A (en) * | 2019-01-29 | 2019-04-16 | 重庆科新电气有限公司 | A kind of inverse Scott Transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109637791A (en) * | 2019-01-29 | 2019-04-16 | 重庆科新电气有限公司 | A kind of inverse Scott Transformer |
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