CN209461279U - The three-phase electric traction transformer of doube bridge bridging - Google Patents
The three-phase electric traction transformer of doube bridge bridging Download PDFInfo
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- CN209461279U CN209461279U CN201920284841.8U CN201920284841U CN209461279U CN 209461279 U CN209461279 U CN 209461279U CN 201920284841 U CN201920284841 U CN 201920284841U CN 209461279 U CN209461279 U CN 209461279U
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Abstract
The utility model relates to a kind of three-phase electric traction transformers of doube bridge bridging, using Three-phase three-leg core structure, A column, C column sleeve coil, each column coil arranges from the inside to the outside are as follows: iron core-low-voltage coil-high-tension coil, pressure regulation tap section is divided into two parts, high-tension coil is sealed in respectively, is drawn to tap to lift one's head and is accessed doube bridge bridging tap switch；On A column all coils be it is left around to, on C column all coils be it is right around to；Pressure regulation tap section is individually positioned at the reactance height 1/4,3/4 of high-tension coil 1；The height of upper and lower two pressure regulation tap section is essentially equal, and the total height of two pressure regulation tap sections is no more than the 10% of high-tension coil total height.The voltage regulating mode of transformer is connect by single spanning and is changed to doube bridge cross-over mode by the utility model, guarantees the ampere-turn equilibrium of high-voltage coil and low-voltage coil, increases the anti-short circuit capability of product, reduces leakage field, reduces the overload temperature rise of limit tap, improves product reliability of operation.
Description
Technical field
The utility model relates to a kind of tractive transformer, specially a kind of three-phase electric traction transformer of doube bridge bridging.
Background technique
Tractive transformer will fully consider the anti-short circuit capability of product according to the feature of its frequent short circuit, when design.Meanwhile
Its operation characteristic requires have the overload period three times daily, maximum three times load 2 minutes, and under any operating condition, product
For hot spot temperature of winding no more than 140 DEG C, product design will meet the overload temperature rise under various operating conditions.Currently, domestic normal
The railway traction transformer of rule generallys use the mode of connection that single spanning connects, and is not provided with individual voltage regulation coil.The mode of connection,
In minimum tap, the ampere-turn between high and low pressure coil is uneven, and the axial mechanical force being subject to is big, and in minimum tap,
Since leakage field causes coiling hotspot temperature rise to increase.
Utility model content
The uneven, winding for ampere-turn of the tractive transformer in the prior art in minimum tap between high and low pressure coil
The deficiencies of temperature rise of hot spot increases, the overload temperature rise that problem to be solved in the utility model is to provide one kind when can make minimum tap
It is distributed the three-phase electric traction transformer of the doube bridge bridging of temperature rise of hot spot that is more uniform, reducing winding.
In order to solve the above technical problems, the technical solution adopted in the utility model is:
A kind of three-phase electric traction transformer of doube bridge bridging of the utility model, using Three-phase three-leg core structure, A column, C column sleeve
Coil, each column coil arrange from the inside to the outside are as follows: iron core-low-voltage coil-high-tension coil, pressure regulation tap section are divided into two parts, respectively
High-tension coil is sealed in, draws to tap to lift one's head and accesses doube bridge bridging tap switch.
On A column all coils be it is left around to, on C column all coils be it is right around to.
Pressure regulation tap section is individually positioned at the reactance height 1/4,3/4 of high-tension coil 1.
The height of upper and lower two pressure regulation tap section is essentially equal, and the total height of two pressure regulation tap sections is no more than high pressure
The 10% of coil total height.
The line gauge of different turn insulations is used at two pressure regulation tap sections, up and down each two at the point of interruption of two pressure regulation tap sections
Section crosses the turn insulation that range request uses 0.95~2.95mm thickness according to by the wave of voltage class, remaining tap section and high-tension coil
The turn insulation that E sections of remaining line segment is consistent.
Two pressure regulation tap oil duct requirement >=30mm of the point of interruption of section, and add the oil clearance of one layer of 1.5~2mm in oil duct
Divide paper circle.
A column, C column high-tension coil head end are lifted one's head and are connected by leader cable, and A, C phase bushing, high-voltage line are directly accessed
Circle end X, Z lead to B phase bushing after linking together by leader cable；Pressure regulation tap section lift one's head connect doube bridge across
Switch is connect, pressure regulation tap wire in top is lifted one's head with the upper half of doube bridge bridge switch to be connect, and lower part pressure regulation tap wire and doube bridge bridge
The lower half of switch is lifted one's head connection.
The utility model has the advantages that and advantage:
1. the voltage regulating mode of transformer is connect by single spanning and is changed to doube bridge cross-over mode by the utility model, guarantee height crimping
The ampere-turn equilibrium of circle increases the anti-short circuit capability of product, reduces leakage field, reduces the overload temperature rise of limit tap, improves product
Reliability of operation.
2. the utility model reduces the cost of product, improves manufacturing enterprise on the basis of guaranteeing properties of product
Benefit.
Detailed description of the invention
Fig. 1 is the three-phase traction transformer connection schematic diagram that the doube bridge of the utility model bridges；
Fig. 2 is that the three-phase electric traction transformer high-tension coil that the doube bridge of the utility model bridges and pressure regulation tap section schematic diagram；
Fig. 3 is the three-phase electric traction transformer lead wiring diagram that the doube bridge of the utility model bridges.
Wherein, 1 is high-tension coil, and 2 divide paper circle for oil clearance, and 3 be bushing, and 4 be leader cable, and 5 tap for pressure regulation
Section, 6 be doube bridge bridge switch, and 7 be top pressure regulation tap wire, and 8 be lower part pressure regulation tap wire, and E is high-tension coil line segment, H1 first
Voltage regulation coil line segment, H2 are the second voltage regulation coil line segment, and Hk is the reactance height of high-tension coil.
Specific embodiment
The utility model is further elaborated with reference to the accompanying drawings of the specification.
As shown in Figure 1, a kind of three-phase electric traction transformer of doube bridge bridging of the utility model, using three-phase three-column iron core knot
Structure, A column, C column sleeve coil, each column coil arrange from the inside to the outside are as follows: iron core-low-voltage coil-high-tension coil, pressure regulation tap section are divided into
Two parts seal in high-tension coil respectively, draw to tap to lift one's head and access doube bridge bridging tap switch.
Pressure regulation tap section is individually positioned at the reactance height 1/4,3/4 of high-tension coil 1；Upper and lower two pressure regulation tap section
It is highly essentially equal, and the total height of two pressure regulation tap sections is no more than the 10% of high-tension coil total height.；Two pressure regulation point
The line gauge that different turn insulations are used at section is connect, two pressure regulation tap at the point of interruption of section each two sections up and down, according to wanting for wave process
It asks using thick turn insulation, remaining section H1 sections of tap is consistent with E sections of remaining line segment of high-tension coil of turn insulation.
In the utility model, center pinch, that is, B column does not cover coil, and voltage regulation coil is not separately provided；All coils are on column A
A left side around to, on column C all coils be it is right around to.
The high-tension coil of the utility model and pressure regulation tap section schematic diagram are specific as shown in Fig. 2, setting high-tension coil 1 reactance height
Degree is Hk, then pressure regulation tap section is individually positioned at 1/4Hk, 3/4Hk.For the ampere-turn equilibrium for guaranteeing coil, it is desirable that upper and lower two
The height that pressure regulation taps section is essentially equal, and the total height of two pressure regulation tap sections is no more than the 10% of coil total height, is
The height for reducing pressure regulation tap section H1, H2 taps the line gauge that different turn insulations are used at section, and each two sections (i.e. up and down at the point of interruption
First voltage regulation coil section H1, the second voltage regulation coil section H2), wherein the second voltage regulation coil section H2 is used according to the requirement of wave process
The turn insulation of 1.95~2.95mm thickness, remaining is the first voltage regulation coil section H1, with E sections of remaining line segment of turn insulation one of high-tension coil
It causes, while oil duct requirement >=30mm of the point of interruption, and adds the paper circle II of one layer of 1.5~2mm in oil duct, carry out oil clearance segmentation.
Specific lead wiring diagram is as shown in figure 3, A column, C column high-tension coil head end are lifted one's head and connected by leader cable, directly
A, C phase bushing 3 is accessed, high-tension coil end X, Z lead to B phase bushing after linking together by leader cable 4
3；Pressure regulation tap section 5, which is lifted one's head, connects doube bridge bridge switch 6, and top pressure regulation tap wire 7 and the upper half of doube bridge bridge switch 6 go out
Head connection, lower part pressure regulation tap wire 8 is lifted one's head with the lower half of doube bridge bridge switch 6 to be connect.In use, passing through rotating switch actuating
Each tapping voltage adjustment can be realized in axis.
The voltage regulating mode of transformer is connect by single spanning and is changed to doube bridge cross-over mode by the utility model, and tap region is entire high
It is divided into the top part and the bottom part in crimping circle point, the number of turns of each tap region is equivalent to one of the number of turns when connecing the mode of connection using single spanning
Half, ensure that the ampere-turn of high-voltage coil and low-voltage coil more balances, and increases the anti-short circuit capability of product in minimum tap in this way.
Simultaneously as the mode that the more single spanning of leakage field connects is much smaller, overload Distribution of temperature rise when minimum taps is more uniform, reduces
The temperature rise of hot spot of winding improves product reliability of operation, realizes on the basis of guaranteeing properties of product, reduces product
Cost, improve the benefit of manufacturing enterprise.
Claims (7)
1. a kind of three-phase electric traction transformer of doube bridge bridging, it is characterised in that: use Three-phase three-leg core structure, A column, C column sleeve
Coil, each column coil arrange from the inside to the outside are as follows: iron core-low-voltage coil-high-tension coil, pressure regulation tap section are divided into two parts, respectively
High-tension coil is sealed in, draws to tap to lift one's head and accesses doube bridge bridging tap switch.
2. the three-phase electric traction transformer of doube bridge bridging according to claim 1, it is characterised in that: all coils are on A column
A left side around to, on C column all coils be it is right around to.
3. the three-phase electric traction transformer of doube bridge bridging according to claim 1, it is characterised in that: pressure regulation tap section is put respectively
It sets at the reactance height 1/4,3/4 of high-tension coil (1).
4. the three-phase electric traction transformer of doube bridge bridging according to claim 3, it is characterised in that: upper and lower two pressure regulation tap
The height of section is essentially equal, and the total height of two pressure regulation tap sections is no more than the 10% of high-tension coil total height.
5. the three-phase electric traction transformer of doube bridge bridging according to claim 3, it is characterised in that:
The line gauge of different turn insulations is used at two pressure regulation tap sections, two pressure regulation tap at the point of interruption of section each two sections up and down,
According to by the wave of voltage class cross range request use 0.95~2.95mm thickness turn insulation, remaining tap section and high-tension coil remaining
The turn insulation that E sections of line segment is consistent.
6. the three-phase electric traction transformer of doube bridge bridging according to claim 5, it is characterised in that:
Oil duct requirement >=30mm of the point of interruption of two pressure regulation tap sections, and add the oil clearance of one layer of 1.5~2mm to divide in oil duct
Paper circle.
7. the three-phase electric traction transformer of doube bridge bridging according to claim 5, it is characterised in that: A column, C column high-tension coil
Head end is lifted one's head to be connected by leader cable, is directly accessed A, C phase bushing, and high-tension coil end X, Z is connected by leader cable
B phase bushing is led to after being connected together；Pressure regulation tap section lifts one's head and connects doube bridge bridge switch, top pressure regulation tap wire and
The upper half of doube bridge bridge switch is lifted one's head connection, and pressure regulation tap wire in lower part is lifted one's head with the lower half of doube bridge bridge switch to be connect.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920284841.8U CN209461279U (en) | 2019-03-06 | 2019-03-06 | The three-phase electric traction transformer of doube bridge bridging |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920284841.8U CN209461279U (en) | 2019-03-06 | 2019-03-06 | The three-phase electric traction transformer of doube bridge bridging |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112049854A (en) * | 2020-09-10 | 2020-12-08 | 燕山大学 | Electrostatic bridging device for chemical equipment and method thereof |
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2019
- 2019-03-06 CN CN201920284841.8U patent/CN209461279U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112049854A (en) * | 2020-09-10 | 2020-12-08 | 燕山大学 | Electrostatic bridging device for chemical equipment and method thereof |
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