CN202405087U - Three-phase to two-phase YNvd balance transformer - Google Patents
Three-phase to two-phase YNvd balance transformer Download PDFInfo
- Publication number
- CN202405087U CN202405087U CN2011205583408U CN201120558340U CN202405087U CN 202405087 U CN202405087 U CN 202405087U CN 2011205583408 U CN2011205583408 U CN 2011205583408U CN 201120558340 U CN201120558340 U CN 201120558340U CN 202405087 U CN202405087 U CN 202405087U
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- China
- Prior art keywords
- windings
- phase
- winding
- secondary side
- iron core
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Abstract
The utility model discloses a three-phase to two-phase YNvd balance transformer which belongs to the technique of the transformer. A column iron core A is provided with windings WA, Wa1 and Wa2; a column iron core B is provided with windings WB and Wb2; a column iron core C is provided with windings WC, Wc1 and Wc2; the WA, WB and WC form a primary side three-phase winding in a star shape; the Wa1 is serially connected with the Wc1 to form a secondary side alpha-phase winding; the Wa2, Wb2 and Wc2 are connected in a triangle to form a secondary side beta-phase winding; the voltage of a secondary side port is Ualpha and Ubeta; Ualpha is equal to Ubeta; WA, WB and WC windings have the same number of turns; the number of turns of the windings Wa2, Wb2 and Wc2 are omega, and the number of turns of the Wa1 and the Wc1 are omega/. A high-voltage side three-phase system does not generate serious asymmetry when two-phase load current at the low-voltage side of the product is equal, and is simple in structure; a primary side neutral point can be directly grounded; two output loops on the secondary side have no electric connection, and satisfying input and output characteristics can be obtained without artificial impedance matching, so that the windings well improve waveform of potential.
Description
Technical field
The utility model belongs to the design and manufacturing technology field of transformer, is specially a kind of three phase transformation two-phase YNvd balancing transformers.
Background technology
In the existing electric railway of China, the common Yd tietransformer of the many employings of the traction substation of most of electrified section.This transformer is because the restriction of structural behaviour; Even when low-pressure side two phase load electric currents equated, the high-pressure side three-phase system also existed seriously asymmetric, therefore bigger negative-sequence current is arranged; Power system operation is produced harmful effect, and the stock utilization of this transformer is low.
The utility model content
The purpose of the utility model is the shortcoming that overcomes prior art; A kind of three phase transformation two-phase YNvd balancing transformers are provided; When these product low-pressure side two phase load electric currents equate; The high-pressure side three-phase system can not occur seriously asymmetric, does not have bigger negative-sequence current, and can improve the stock utilization of transformer.
The structure of the utility model: transformer core is three post uiform sections, is with W on the A post iron core
A , W
A1 , W
A2 Three windings, W
A In the middle of winding places, W
A1 And W
A2 Two windings place W respectively
A The outside of winding and inboard; Be with W on the B post iron core
B , W
B2 Two windings, W
B Winding places the outside, W
B2 Place the inboard; Be with W on the C post iron core
C , W
C1 , W
C2 Three windings, W
C In the middle of winding places, W
C1 And W
C2 Two windings place W respectively
C The outside of winding and inboard, W
A , W
B And W
C Connect into three phases winding at primary side by star connection; W
A1 And W
C1 Be connected into secondary side α phase winding; W
A2 , W
B2 , W
C2 Connect into secondary side β phase winding by delta connection; The secondary side port voltage is respectively U
αAnd U
β, U
α=U
β, W
A , W
B And W
C The number of turn of three windings is identical, W
A2 , W
B2 And W
C2 The number of turn of three windings is ω, W
A1 And W
C1 The number of turn be ω/
The said three post uiform sections iron core of the utility model is a prior art.
The beneficial effect of the utility model: when these product low-pressure side two phase load electric currents equated, the high-pressure side three-phase system can not occur seriously asymmetric, does not have bigger negative-sequence current, and can improve the stock utilization of transformer.Simple in structure, function admirable, be convenient to design and make.Can satisfy the various requirement of power system of electric railway to traction transformer: the primary side neutral point is ground connection directly, and secondary side two output loops do not have electrical link, does not need impedance matching artificially can obtain satisfied input, output characteristic.Because this transformer has the delta connection winding, for the triple-frequency harmonics of exciting current provides path, so this winding has improved the waveform of electromotive force preferably.
Description of drawings
Fig. 1 is the winding connection principle schematic of the utility model and embodiment.
Fig. 2 is that winding position and the winding of embodiment connects sketch map.
Embodiment
Embodiment: see Fig. 1～2.Wherein 1 is the A post iron core of balancing transformer, and 2 is that the B post is unshakable in one's determination, and 3 is that the C post is unshakable in one's determination, and 4 is balancing transformer primary side input terminal A, and 5 is primary side input terminal B, and 6 is primary side input terminal C.7,8 be respectively balancing transformer secondary side α phase output terminals a1, c1.9,10 be respectively balancing transformer secondary side β phase output terminals a2, c2.11,12,13 be respectively balancing transformer three phases winding at primary side W
A , W
B, W
C 14,15 be respectively balancing transformer secondary side α two winding W mutually
A1 And W
C1 16,17,18 be respectively balancing transformer secondary side β three winding W mutually
A2 , W
B2 And W
C2
Transformer core is three post uiform sections, is with W on the A post iron core
A , W
A1 , W
A2 Three windings, W
A In the middle of winding places, W
A1 And W
A2 Two windings place W respectively
A The outside of winding and inboard; Be with W on the B post iron core
B , W
B2 Two windings, W
B Winding places the outside, W
B2 Place the inboard; Be with W on the C post iron core
C , W
C1 , W
C2 Three windings, W
C In the middle of winding places, W
C1 And W
C2 Two windings place W respectively
C The outside of winding and inboard, W
A , W
B And W
C Connect into three phases winding at primary side by star connection; W
A1 And W
C1 Be connected into secondary side α phase winding; W
A2 , W
B2 , W
C2 Connect into secondary side β phase winding by delta connection; The secondary side port voltage is respectively U
αAnd U
β, U
α=U
β, W
A , W
B And W
C The number of turn of three windings is identical, W
A2 , W
B2 And W
C2 The number of turn of three windings is ω, W
A1 And W
C1 The number of turn be ω/
Claims (1)
1. phase transformation two-phase YNvd balancing transformer, it is characterized in that: transformer core is three post uiform sections, is with W on the A post iron core
A , W
A1 , W
A2 Three windings, W
A In the middle of winding places, W
A1 And W
A2 Two windings place W respectively
A The outside of winding and inboard; Be with W on the B post iron core
B , W
B2 Two windings, W
B Winding places the outside, W
B2 Place the inboard; Be with W on the C post iron core
C , W
C1 , W
C2 Three windings, W
C In the middle of winding places, W
C1 And W
C2 Two windings place W respectively
C The outside of winding and inboard, W
A , W
B And W
C Connect into three phases winding at primary side by star connection; W
A1 And W
C1 Be connected into secondary side α phase winding; W
A2 , W
B2 , W
C2 Connect into secondary side β phase winding by delta connection; The secondary side port voltage is respectively U
αAnd U
β, U
α=U
β, W
A , W
B And W
C The number of turn of three windings is identical, W
A2 , W
B2 And W
C2 The number of turn of three windings is ω, W
A1 And W
C1 The number of turn be ω/
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205583408U CN202405087U (en) | 2011-12-28 | 2011-12-28 | Three-phase to two-phase YNvd balance transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205583408U CN202405087U (en) | 2011-12-28 | 2011-12-28 | Three-phase to two-phase YNvd balance transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202405087U true CN202405087U (en) | 2012-08-29 |
Family
ID=46702719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205583408U Expired - Fee Related CN202405087U (en) | 2011-12-28 | 2011-12-28 | Three-phase to two-phase YNvd balance transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202405087U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103700472A (en) * | 2013-12-16 | 2014-04-02 | 中国人民解放军海军工程大学 | Three phase and two phase interconverted balancing transformer |
| CN113852070A (en) * | 2021-09-09 | 2021-12-28 | 中铁二院工程集团有限责任公司 | Traction and electric power hybrid power supply system for alternating current electrified rail transit engineering |
-
2011
- 2011-12-28 CN CN2011205583408U patent/CN202405087U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103700472A (en) * | 2013-12-16 | 2014-04-02 | 中国人民解放军海军工程大学 | Three phase and two phase interconverted balancing transformer |
| CN113852070A (en) * | 2021-09-09 | 2021-12-28 | 中铁二院工程集团有限责任公司 | Traction and electric power hybrid power supply system for alternating current electrified rail transit engineering |
| CN113852070B (en) * | 2021-09-09 | 2023-09-22 | 中铁二院工程集团有限责任公司 | Traction and power hybrid power supply system for alternating current electric rail transit engineering |
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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: 20120829 Termination date: 20171228 |