CN201749765U - High-capacity and high-impedance transformer - Google Patents
High-capacity and high-impedance transformer Download PDFInfo
- Publication number
- CN201749765U CN201749765U CN 201020276114 CN201020276114U CN201749765U CN 201749765 U CN201749765 U CN 201749765U CN 201020276114 CN201020276114 CN 201020276114 CN 201020276114 U CN201020276114 U CN 201020276114U CN 201749765 U CN201749765 U CN 201749765U
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- CN
- China
- Prior art keywords
- transformer
- fuel tank
- impedance transformer
- winding
- oil tank
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- Expired - Fee Related
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Abstract
The utility model discloses a high-capacity and high-impedance transformer. The transformer comprises an oil tank and a winding arranged in the oil tank; and the inner walls of the oil tank and the end part of the winding are all fixed with magnetic shielding structures. For the transformer, the running meets the requirements of effectively controlling the temperature rising and local overheating of the transformer, and the local overheating phenomenon in the running is reduced, therefore, the transformer is more reliable and is characterized by reasonable design, simple structure, safety and reliability.
Description
Technical field
The utility model relates to a kind of high impedance, jumbo unconventional transformer.
Background technology
High-power transformer is big because of its capacity, so very strict to the control of its temperature rise and local overheating, and high more its loss of transformer of short-circuit impedance value is just big more, the loss conference causes the local superheating phenomenon of transformer fairly obvious, thus at present in China's national standard to the requirement of transformer short-circuit resistance value 12%～14%.
If the power transformer product short-circuit impedance value of design is 24%, will be considerably beyond national standard, must calculate at the electromagnetism of product and structural design on take to improve accordingly measure, to overcome the security hidden trouble that the local overheating phenomenon causes.
Summary of the invention
For achieving the above object, the utility model provides a kind of big capacity high-impedance transformer, and its technical scheme of taking is:
This transformer comprises fuel tank and is located at the interior winding of fuel tank that inner wall of oil tank and winding overhang all are fixed with magnet shielding structure.
The magnet shielding structure of inner wall of oil tank is made up of silicon steel sheet.
The ground strip of fuel tank internal is a copper sheet, and the ground strip of fuel tank outside is the ground connection copper bar.
Inner wall of oil tank of the present utility model adopts magnet shielding structure, makes the magnetic circuit of leakage field unimpeded, reduces eddy current loss; Winding overhang adopts magnetic screen, reduces the horizontal leakage field of winding overhang, has avoided the temperature rise of winding overhang metal structure too high; The ground strip of fuel tank internal adopts copper sheet, the employing ground connection copper bar of fuel tank outside, thus reduce earth resistance, avoid because the caused local overheating of circulating current that may exist.
Therefore adopt above structure that transformer is in operation and effectively reduce the local overheating phenomenon, more safe and reliable, the utlity model has reasonable in design, simple in structure, safe and reliable characteristics.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
Embodiment:
Below in conjunction with accompanying drawing the utility model is further described:
As shown in the figure, this transformer comprises fuel tank 1 and the winding of being located in the fuel tank 12, fuel tank 1 inwall adopts magnet shielding structure, it specifically is silicon steel sheet 3 in some on inboard fixing about tank wall, can make most of magnetic induction line only have a spot of magnetic induction line to pass through on the tank wall by making, thereby because the magnetic induction line on the tank wall has lacked the eddy current loss that reduces greatly on the tank wall from 3 li of silicon steel sheets.Magnet shielding structure 6 is all adopted in the left and right sides of coil windings 2 upper and lower end parts, reduces the horizontal leakage field of winding overhang, has avoided the temperature rise of winding overhang metal structure too high.The ground connection of transformer inside adopts ground strip reliably to be connected the mode that compresses with nut again with bolt, make ground structure very reliable, for reducing earth resistance, the ground strip of transformer inside adopts copper sheet 4, the ground strip of transformer outside adopts ground connection copper bar 5, avoids because the caused local overheating of circulating current that may exist.
The requirement of effectively its temperature rise of control and local overheating is satisfied in this transformer operation, is in operation and reduces the local overheating phenomenon, makes it more reliable.
Claims (3)
1. one kind big capacity high-impedance transformer comprises fuel tank (1) and is located at the interior winding (2) of fuel tank (1), and it is characterized in that: fuel tank (1) inwall and winding (2) end all are fixed with magnet shielding structure.
2. big capacity high-impedance transformer according to claim 1 is characterized in that: the magnet shielding structure of fuel tank (1) inwall is made up of silicon steel sheet (3).
3. big capacity high-impedance transformer according to claim 1 and 2 is characterized in that: the inner ground strip of fuel tank (1) is copper sheet (4), and the outside ground strip of fuel tank (1) is ground connection copper bar (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020276114 CN201749765U (en) | 2010-07-30 | 2010-07-30 | High-capacity and high-impedance transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020276114 CN201749765U (en) | 2010-07-30 | 2010-07-30 | High-capacity and high-impedance transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201749765U true CN201749765U (en) | 2011-02-16 |
Family
ID=43584438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020276114 Expired - Fee Related CN201749765U (en) | 2010-07-30 | 2010-07-30 | High-capacity and high-impedance transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201749765U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105761901A (en) * | 2016-02-19 | 2016-07-13 | 上海电机学院 | Magnetic shielding device of transformer oil tank |
| CN105788833A (en) * | 2016-04-26 | 2016-07-20 | 国家电网公司 | Novel impedance-variable energy-saving transformer |
-
2010
- 2010-07-30 CN CN 201020276114 patent/CN201749765U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105761901A (en) * | 2016-02-19 | 2016-07-13 | 上海电机学院 | Magnetic shielding device of transformer oil tank |
| CN105788833A (en) * | 2016-04-26 | 2016-07-20 | 国家电网公司 | Novel impedance-variable energy-saving transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110216 Termination date: 20160730 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |