CN106504865B - Rolled iron core dry-type auto-transformer - Google Patents
Rolled iron core dry-type auto-transformer Download PDFInfo
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- CN106504865B CN106504865B CN201611121129.3A CN201611121129A CN106504865B CN 106504865 B CN106504865 B CN 106504865B CN 201611121129 A CN201611121129 A CN 201611121129A CN 106504865 B CN106504865 B CN 106504865B
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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
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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
- H01F27/24—Magnetic cores
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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)
- Transformers For Measuring Instruments (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The invention discloses a kind of rolled iron core dry-type auto-transformer, it includes iron core, the iron core has two core limbs, respectively left core limb and right core limb, the left core limb is disposed with the first left winding from the inside to the outside, second left winding, 3rd left winding and the 4th left winding, the right core limb is disposed with the first right winding from the inside to the outside, second right winding, 3rd right winding and the 4th right winding, the lower end of the first left winding is connected with the lower end of the 4th right winding, the upper end and the upper end of the described first right winding of the 4th right winding are connected together, and form tie point B, the upper end of the second left winding and the 3rd left winding connects together, and form tie point A, the lower end of the second left winding is connected with the lower end of the 3rd right winding.The present invention can not only reduce the potential difference between each winding of transformer, reduce between winding and winding is to the insulation distance of iron core, and add the radiating surface of its own, improve radiating effect.
Description
Technical field
The present invention relates to a kind of rolled iron core dry-type auto-transformer, belong to transformer technology field.
Background technology
At present, China's electric railway uses AT power supply modes, and AT power supply special-purpose autotransformers are in AT electric power systems
Important electrical, with the high speed development of China's electric railway, it is more and more to pass through the electric railway on high and steep mountains,
Some local tunnels are ined succession bridge, it is difficult to find smooth to place auto-transformer, can only often be put auto-transformer
Put in tunnel, for safety, these auto-transformers there must be very high fire-proof and explosion-proof performance, and conventional AT power supplies are certainly
Coupling transformer capacity is larger, typically to reach single-phase 20MVA~32MVA, and voltage reaches 2 × 27.5kV, dry-type transformer it is exhausted
Edge and heat eliminating medium are epoxy resin and air, and the insulation of air and heat dispersion are poorer than traditional medium transformer oil.
The content of the invention
The technical problems to be solved by the invention are the defects of overcoming prior art, there is provided a kind of rolled iron core dry-type self coupling becomes
Depressor, it can not only reduce the potential difference between each winding of transformer, reduce between winding and insulation of the winding to iron core away from
From, and the radiating surface of its own is added, improve radiating effect.
In order to solve the above-mentioned technical problem, the technical scheme is that：A kind of rolled iron core dry-type auto-transformer, it is wrapped
Include iron core, the iron core has two core limbs, respectively left core limb and a right core limb, the left core limb from the inside to the outside according to
Secondary to be provided with the first left winding, the second left winding, the 3rd left winding and the 4th left winding, the right core limb is from the inside to the outside successively
It is provided with the first right winding, the second right winding, the 3rd right winding and the 4th right winding, the lower end and the 4th of the first left winding
The lower end of right winding is connected, and the upper end and the upper end of the described first right winding of the 4th right winding are connected together, and are formed
The upper end of tie point B, the second left winding and the 3rd left winding connects together, and forms tie point A, and described second
The lower end of left winding is connected with the lower end of the 3rd right winding, lower end and the described second right winding of the 3rd left winding
Lower end is connected, and the lower end of the 4th left winding is connected with the lower end of the first right winding, the upper end of the first left winding, the 4th
The upper end of left winding, the upper end of the second right winding, the upper end of the 3rd right winding link together, and form tie point O.
Further, after the upper end of the described second right winding and the 3rd right winding connects together, then with the first left winding
Upper end is connected with the upper end of the 4th left winding, forms tie point O.
Further, the described first left winding, the 4th left winding, the first right winding and the 4th right winding are public winding.
Further, the described second left winding, the 3rd left winding, the second right winding and the 3rd right winding are series connection winding.
Further for its energy-saving effect is improved, the iron core is opening rewinding material, and is docked by upper and bottom section
Form.
After employing above-mentioned technical proposal, the present invention is by each to reduce transformer in structure and the connected mode of each winding
Potential difference between winding, and radiating surface can be increased to solve the insulation of auto-transformer and heat dissipation problem；In addition, also pass through
Reach the purpose of energy-conservation using opening rewinding material.
Brief description of the drawings
Fig. 1 is the structural representation of the rolled iron core dry-type auto-transformer of the present invention；
Fig. 2 is the wiring diagram of the winding of the present invention；
Fig. 3 is the simplified wiring figure of the winding of the present invention；
Fig. 4 is the induced test schematic diagram of the present invention；
Fig. 5 is the industrial frequency withstand voltage Test Drawing one of the present invention；
Fig. 6 is the industrial frequency withstand voltage Test Drawing two of the present invention；
Fig. 7 is the structural representation unshakable in one's determination of the present invention.
Embodiment
In order that present disclosure is easier to be clearly understood, it is right below according to specific embodiment and with reference to accompanying drawing
The present invention is described in further detail.
As shown in Figures 1 to 3, a kind of rolled iron core dry-type auto-transformer, it, which includes iron core 100, described unshakable in one's determination 100, has two
Individual core limb, respectively left core limb 101 and right core limb 102, the left core limb 101 are disposed with first from the inside to the outside
Left winding 1, the second left winding 2, the 3rd left 3 and the 4th left winding 4 of winding, the right core limb 102 are set gradually from the inside to the outside
There are the first right winding 10, the second right winding 20, the 3rd right 30 and the 4th right winding 40 of winding, the lower end of the first left winding 1
It is connected with the lower end of the 4th right winding 40, the upper end and the upper end of the described first right winding 10 of the 4th right winding 40 are mutually connected in
Together, and tie point B is formed, the upper end of the second left winding 2 and the 3rd left winding 3 connects together, and the company of being formed
Contact A, the lower end of the second left winding 2 are connected with the lower end of the described 3rd right winding 30, the lower end of the 3rd left winding 3
It is connected with the lower end of the described second right winding 20, the lower end of the 4th left winding 4 is connected with the lower end of the first right winding 10, institute
Upper end, the upper end of the 4th left winding 4, the upper end of the second right winding 20, the upper end of the 3rd right winding 30 for stating the first left winding 1 connect
It is connected together, and forms tie point O.
As shown in Fig. 2 after the upper end of second right 20 and the 3rd right winding 30 of winding connects together, then with it is first left
The upper end of winding 1 is connected with the upper end of the 4th left winding 4, forms tie point O.
The first left winding 1, the 4th left winding 4, the first right 10 and the 4th right winding 40 of winding are public winding.
The second left winding 2, the 3rd left winding 3, the second right 20 and the 3rd right winding 30 of winding are series connection winding.
As shown in fig. 7, described unshakable in one's determination 100 be opening rewinding material, and docked and formed by upper part 1001 and lower part 1002.
According to induced test method, as shown in figs. 2 to 4, A points are+55kV, and B (x ', x ") points are -55kV, O (a ', a ", x)
Point is grounded, A " above earth potentials 27.5kV, B " above earth potential -27.5kV, and the potential difference between terminal is：
A-a "=A-a '=55kV
B-x=-55kV
A ' A " equipotentials, B ' B " equipotentials
A '-B "=A "-B '=A '-B '=A "-B "=55kV
Because O terminal insulatives level is compared with head end A, B terminals are low, and industrial frequency experiment needs to realize by the method sensed, such as schemes
2nd, shown in 3,5,6.
During A terminal industrial frequency experiments, B terminal grounds apply 42.5kV voltages between OB, B terminals 85kV over the ground, remaining terminal
Between potential difference be：
A-O=O-B=42.5kV
A ' A " equipotentials, B ' B " equipotentials
A '-B "=A "-B '=A '-B '=A "-B "=42.5kV
During B terminal industrial frequency experiments, A terminal grounds apply 42.5kV voltages between AO, A terminals 85kV over the ground, remaining terminal
Between potential difference be：
B-O=O-A=42.5kV
A ' A " equipotentials, B ' B " equipotentials
B "-A '=B '-A "=B '-A '=B "-A "=42.5kV
Calculated more than, winding is 85kV to core limb maximum industrial frequency experiment voltage, and pressure difference is as follows between winding：
II-HV of LV II are 55kV, and II-HV of HV I are 0kV, and I-LV of HV I are 55kV；
LV II '-HV II ' is 55kV, and HV II '-HV I ' is 0kV, and HV I '-LV I ' is 55kV；
The voltage differences of I-LV of LV I ' are 55kV between different post winding；Especially II-HV of HV I and HV II '-HV I '
Equipotential between winding, it is pourable to be integrated, it is only necessary to according to the needs of radiating set radiating air flue, from
Upper analysis understands that voltage difference distribution is more excellent between connected mode of the invention compares each winding of conventional coupling arrangement,
Can
Reduce winding between, winding to iron core insulation distance, especially II-HV of HV I and HV II '-HV I ' around
Insulation distance greatly reduces between group, will very economic and reliable using the connected mode of the present invention.
Particular embodiments described above, pair present invention solves the technical problem that, technical scheme and beneficial effect carry out
It is further described, should be understood that the specific embodiment that the foregoing is only the present invention, is not limited to this
Invention, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., should be included in this hair
Within bright protection domain.
Claims (5)
1. a kind of rolled iron core dry-type auto-transformer, it is characterised in that it includes (100) unshakable in one's determination, and the iron core (100) has two
Individual core limb, respectively left core limb (101) and right core limb (102), the left core limb (101) set gradually from the inside to the outside
There are the first left winding (1), the second left winding (2), the 3rd left winding (3) and the 4th left winding (4), the right core limb (102)
The first right winding (10), the second right winding (20), the 3rd right winding (30) and the 4th right winding are disposed with from the inside to the outside
(40), the lower end of the described first left winding (1) is connected with the lower end of the 4th right winding (40), the 4th right winding (40) it is upper
End and the upper end of the described first right winding (10) are connected together, and form tie point B, the second left winding (2) and described
The upper end of 3rd left winding (3) connects together, and forms tie point A, the lower end and the described 3rd of the second left winding (2)
The lower end of right winding (30) is connected, and the lower end of the 3rd left winding (3) is connected with the lower end of the described second right winding (20), institute
The lower end for stating the 4th left winding (4) is connected with the lower end of the first right winding (10), the upper end of the first left winding (1), the 4th
The upper end of left winding (4), the upper end of the second right winding (20), the upper end of the 3rd right winding (30) link together, and the company of being formed
Contact O.
2. rolled iron core dry-type auto-transformer according to claim 1, it is characterised in that：The second right winding (20) and
After the upper end of 3rd right winding (30) connects together, then with the upper end of the first left winding (1) and the upper end of the 4th left winding (4)
It is connected, forms tie point O.
3. rolled iron core dry-type auto-transformer according to claim 1, it is characterised in that：The first left winding (1),
Four left windings (4), the first right winding (10) and the 4th right winding (40) are public winding.
4. rolled iron core dry-type auto-transformer according to claim 1, it is characterised in that：The second left winding (2),
Three left windings (3), the second right winding (20) and the 3rd right winding (30) are series connection winding.
5. rolled iron core dry-type auto-transformer according to claim 1, it is characterised in that：The iron core (100) is opening
Rewinding material, and formed by upper part (1001) and lower part (1002) docking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611121129.3A CN106504865B (en) | 2016-12-08 | 2016-12-08 | Rolled iron core dry-type auto-transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611121129.3A CN106504865B (en) | 2016-12-08 | 2016-12-08 | Rolled iron core dry-type auto-transformer |
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| Publication Number | Publication Date |
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| CN106504865A CN106504865A (en) | 2017-03-15 |
| CN106504865B true CN106504865B (en) | 2018-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611121129.3A Active CN106504865B (en) | 2016-12-08 | 2016-12-08 | Rolled iron core dry-type auto-transformer |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201219063Y (en) * | 2008-06-05 | 2009-04-08 | 苏州试验仪器总厂 | Audio self-coupling output transformer used for electric vibration experiment system |
| CN101651030A (en) * | 2009-08-07 | 2010-02-17 | 中国西电电气股份有限公司 | Autotransformer with low-voltage compensation |
| CN204067011U (en) * | 2014-09-30 | 2014-12-31 | 卧龙电气集团股份有限公司 | A kind of rewinding material autotransformer |
| CN206225154U (en) * | 2016-12-08 | 2017-06-06 | 常州太平洋电力设备(集团)有限公司 | Rolled iron core dry-type auto-transformer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57136309A (en) * | 1981-02-18 | 1982-08-23 | Toshiba Corp | Single-phase autotransformer |
-
2016
- 2016-12-08 CN CN201611121129.3A patent/CN106504865B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201219063Y (en) * | 2008-06-05 | 2009-04-08 | 苏州试验仪器总厂 | Audio self-coupling output transformer used for electric vibration experiment system |
| CN101651030A (en) * | 2009-08-07 | 2010-02-17 | 中国西电电气股份有限公司 | Autotransformer with low-voltage compensation |
| CN204067011U (en) * | 2014-09-30 | 2014-12-31 | 卧龙电气集团股份有限公司 | A kind of rewinding material autotransformer |
| CN206225154U (en) * | 2016-12-08 | 2017-06-06 | 常州太平洋电力设备(集团)有限公司 | Rolled iron core dry-type auto-transformer |
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| CN106504865A (en) | 2017-03-15 |
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Effective date of registration: 20171221 Address after: 213022 environmental protection park, spring river town, Xinbei District, Changzhou City, Jiangsu Province, No. 88 environmental protection Road No. four Applicant after: Changzhou Pacific Electric Power Equipment (Group) Co., Ltd. Applicant after: CHINA RAILWAY CORPORATION Address before: 213033 Jiangsu city in Changzhou Province town of new North Chunjiang garden environmental protection environmental protection four Road No. 88 Applicant before: Changzhou Pacific Electric Power Equipment (Group) Co., Ltd. |
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