CN201508753U - Oil immersion-type rectifier transformer specially used for frequency conversion - Google Patents
Oil immersion-type rectifier transformer specially used for frequency conversion Download PDFInfo
- Publication number
- CN201508753U CN201508753U CN200920227314XU CN200920227314U CN201508753U CN 201508753 U CN201508753 U CN 201508753U CN 200920227314X U CN200920227314X U CN 200920227314XU CN 200920227314 U CN200920227314 U CN 200920227314U CN 201508753 U CN201508753 U CN 201508753U
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- frequency conversion
- rectifier transformer
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Abstract
The utility model relates to an oil immersion-type rectifier transformer specially used for frequency conversion, belongs to transformers and mainly solves the problem of high cost and strong harmonic current of the current frequency conversion-used transformer. The rectifier transformer comprises a high-voltage coil, a low-voltage coil and an iron core, wherein the section of the iron core adopts an elliptic structure; the high-voltage coil and the low-voltage coil both adopt elliptic structures corresponding to the iron core; the high-voltage coil adopts D-shaped connection; and a copper foil or aluminium foil shielding layer is arranged between the high-voltage coil and the low-voltage coil. The high-voltage coil adopts D-shaped connection, so that higher harmonic current is effectively restrained, and the quality of electricity supplying waveform is ensured; and the coils are changed from circular structure to the elliptic structure, so that the cost of the rectifier transformer is effectively reduced.
Description
Technical field
The utility model relates to a kind of transformer, specifically a kind of oil immersed type rectifier transformer of frequency conversion special use.
Background technology
In the height-low-high conversion process of frequency converter, necessary careful selection and use transformer, and consider other many-sided factors, and take appropriate measures, device can well be moved, if select common power transformer, its capacity should amplify 20% at least, with the harmonic current of bearing net side, causes the waste of material resources like this, and the processing of the harmonic circuit of net side is bad, can cause transformer temperature rise in service too high.The common transformer wiring is Yyn0, when its secondary side load produces the 3n subharmonic current, except that three-phase load unsymmetrical current summation is arranged, also will flow through the algebraical sum of 3n subharmonic current on its neutral line, and harmonic current is flowed into electrical network by the transformer primary side.No matter whether harmonic current flows into electrical network, and all harmonic currents all can increase the electric energy loss of transformer, and have increased the temperature rise of transformer, so there is the high and big problem of harmonic current of cost in common frequency conversion with transformer.
The utility model content
There is the high and big problem of harmonic current of cost at existing frequency conversion with transformer, the utility model provides a kind of novel frequency conversion special-purpose oil immersed type rectifier transformer, it is by being adjusted into oval winding construction with circular winding construction, and the mode that adopts D to connect high-tension coil, both reduce the cost of transformer, can suppress higher harmonic current again.
The concrete technical scheme that the utility model adopts is: the special-purpose oil immersed type rectifier transformer of frequency conversion, comprise low-voltage coil and high-tension coil, described high-tension coil adopts D to connect, this high-tension coil adopts D to connect to connect with Y to be compared, help suppressing higher harmonic current, reduce electric energy loss, the first side winding that Dyn11 connects is connected into D shape, higher harmonic current based on the 3n subharmonic in the exciting current once is being connected under the triangle condition, can form circulation at primary side, the public high-voltage fence of unlikely injection goes, and makes magnetic flux become sine wave, and secondary side electromotive force and electric current are sine wave, the 3n subharmonic current can not occur in load, realize the circulation of 3n subharmonic, reduced the electric energy loss of transformer, guaranteed the quality of supply waveform.
Described core section is made as ellipsoidal structure, and low-voltage coil and high-tension coil are made as and corresponding ellipsoidal structure unshakable in one's determination, by coil is changed into ellipsoidal structure, can effectively reduce the use amount of coil method, reduce cost.
Be provided with the screen of Copper Foil or aluminium foil between described low-voltage coil and the high-tension coil, can be bent into oval shape with the copper sheet of 0.3mm is put between the high-low pressure winding, lift one's head and be attached on the folder, by folder, fuel tank ground connection, Copper Foil or aluminum foil shielded are set: when break down in the high-pressure side, the fault point is isolated in shielding, can not have influence on the frequency converter that low-pressure side connects, and has reduced cost with respect to the rectification of the circular cross-section of conventional design with transformer.
The beneficial effects of the utility model are: the special-purpose oil immersed type rectifier transformer of this frequency conversion, by the mode that adopts D to connect high-tension coil, effectively suppress higher harmonic current, reduce electric energy loss simultaneously, coil is changed into ellipsoidal structure by circular configuration, can effectively reduce the cost of this transformer, be very suitable in frequency converter, using.
Description of drawings
Accompanying drawing 1 is the vertical view of iron core of the present utility model and winding construction thereof;
Accompanying drawing 2 is the utility model mesohigh coil delta connection figure.
The 1st, unshakable in one's determination, the 2nd, low-voltage coil, the 3rd, high-tension coil, the 4th, the Copper Foil screen, the 5th, shielding is lifted one's head.
Embodiment
As shown in Figure 1, the special-purpose oil immersed type rectifier transformer of this frequency conversion, comprise low-voltage coil 2, high-tension coil 3 and unshakable in one's determination 1,1 cross section unshakable in one's determination is made as ellipsoidal structure, low-voltage coil 2 and high-tension coil 3 are made as and 1 corresponding oval coil unshakable in one's determination, by coil is changed into ellipsoidal structure, can effectively reduce the use amount of coil, reduce cost.
High-tension coil 3 adopts D to connect, and uses Dyn11 to connect, and as shown in Figure 2, should reduce the electric energy loss of transformer towards on high-tension side delta connection, guarantees the quality of supply waveform.
Be provided with Copper Foil screen 4 between low-voltage coil 2 and the high-tension coil 3, Copper Foil is bent into oval shape with the copper sheet of 0.3mm and is put between the high-low pressure winding, shielding is lifted one's head and 5 is attached on the folder, by folder, fuel tank ground connection, the Copper Foil shielding is set, and when break down in the high-pressure side, the fault point is isolated in shielding, can not have influence on the frequency converter that low-pressure side connects, reduce cost with transformer with respect to the rectification of the circular cross-section of conventional design.
The special-purpose oil immersed type rectifier transformer of this frequency conversion by the mode that adopts D to connect high-tension coil, effectively suppresses higher harmonic current, guarantee the quality of supply waveform, coil is changed into ellipsoidal structure by circular configuration, can effectively reduce the cost of this transformer, and this technology is very suitable for using in the frequency converter.
Other contents of not describing are prior art, do not repeat them here.
Claims (3)
1. the special-purpose oil immersed type rectifier transformer of frequency conversion comprises low-voltage coil (2) and high-tension coil (3), it is characterized in that, described high-tension coil (3) adopts D to connect.
2. the special-purpose oil immersed type rectifier transformer of frequency conversion according to claim 1 is characterized in that described iron core (1) cross section is made as ellipsoidal structure, and low-voltage coil (2) and high-tension coil (3) are made as and (1) corresponding oval coil unshakable in one's determination.
3. the special-purpose oil immersed type rectifier transformer of frequency conversion according to claim 1 and 2 is characterized in that, is provided with the screen of Copper Foil or aluminium foil between described low-voltage coil (2) and the high-tension coil (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920227314XU CN201508753U (en) | 2009-09-25 | 2009-09-25 | Oil immersion-type rectifier transformer specially used for frequency conversion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920227314XU CN201508753U (en) | 2009-09-25 | 2009-09-25 | Oil immersion-type rectifier transformer specially used for frequency conversion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201508753U true CN201508753U (en) | 2010-06-16 |
Family
ID=42469879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920227314XU Expired - Fee Related CN201508753U (en) | 2009-09-25 | 2009-09-25 | Oil immersion-type rectifier transformer specially used for frequency conversion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201508753U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102456474A (en) * | 2010-10-20 | 2012-05-16 | 中变集团上海变压器有限公司 | Transformer coil structure employing copper foil |
| CN104064334A (en) * | 2014-07-09 | 2014-09-24 | 伊戈尔电气股份有限公司 | Grounding screen for main oil gallery of high-voltage and low-voltage coils of transformer |
-
2009
- 2009-09-25 CN CN200920227314XU patent/CN201508753U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102456474A (en) * | 2010-10-20 | 2012-05-16 | 中变集团上海变压器有限公司 | Transformer coil structure employing copper foil |
| CN104064334A (en) * | 2014-07-09 | 2014-09-24 | 伊戈尔电气股份有限公司 | Grounding screen for main oil gallery of high-voltage and low-voltage coils of 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100616 Termination date: 20160925 |