CN202230853U - Phase-shifting transformer - Google Patents
Phase-shifting transformer Download PDFInfo
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- CN202230853U CN202230853U CN201120403511XU CN201120403511U CN202230853U CN 202230853 U CN202230853 U CN 202230853U CN 201120403511X U CN201120403511X U CN 201120403511XU CN 201120403511 U CN201120403511 U CN 201120403511U CN 202230853 U CN202230853 U CN 202230853U
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Abstract
The utility model relates to a phase-shifting transformer used in the field of high voltage frequency conversion systems, in particular to an improvement on a primary high voltage winding structure of the phase-shifting transformer, which comprises a primary high voltage winding and more than two secondary high voltage windings. A certain electrical angle is in phase shift between the secondary high voltage windings. The secondary high voltage windings are axially distributed along an iron core of the transformer. Each phase of secondary high voltage winding is formed by parallelly connecting more than two branch windings which are separated in an insulation mode and distributed along the iron core of the transformer axially, vertically and evenly. Each phase of secondary high voltage winding on the high voltage side is formed by parallelly connecting several branch windings which are distributed along the iron core of the transformer axially, thereby enabling winding magnetic potential on a primary side and winding magnetic potential on a secondary side to be relatively even and greatly reducing impedance deviation rate of the secondary windings. The technical scheme of the phase-shifting transformer can be applied to the phase-shifting transformer.
Description
Technical field
The present invention relates to the phase shifting transformer that high-pressure frequency-conversion system field is used, the particularly improvement of one of which sub-high pressure winding construction, thus make the output impedance of secondary winding more even.
Background technology
High voltage converter is applicable to the frequency control of high-voltage motor, and phase shifting transformer is the important component part of high voltage converter.The structure of existing widely used phase shifting transformer is as shown in Figure 1, comprises winding (high pressure winding), 2 groups of above secondary winding (U1, V1, W1; U2, V2, W2; ...) form triangle, Y shape or extend-triangle respectively, thus make between every group of secondary winding the certain electrical degree of phase shift to each other, and secondary winding is along the transformer axial distribution.Because each sub-winding (for example U1 or V1 or W1) present position has nothing in common with each other in every group of secondary winding, so just caused the impedance of each sub-winding in each secondary winding different, dispersiveness is very big.
For example according to the phase shifting transformer that the includes 3 groups of secondary low-voltage windings (parameter of transformer: 10000KVA of structure manufacturing shown in Figure 1; Input voltage 3300V; Output 640V, frequency 50HZ), according to the standard testing standard of such transformer; With one of them sub-winding short circuit of secondary side (for example the U1 short circuit) of transformer, other sub-windings (U2, U3, V1, V2, V3, W1, W2, W3) open circuit.Feed the testing impedance that rated current is carried out the U1 sub-winding from once surveying then.Then and the like carry out the test of other groups, and test result is calculated.
Can find out that by following table 1 and corresponding test data its distribution of impedance rule is: be small at both ends and big in the middle.The deviation ratio of each sub-winding is: (U
Maximum-U
Minimum value)/U
Minimum value* 100%=41.1%; (V
Maximum-V
Minimum value)/U
Minimum value* 100%=30.1%; (W
Maximum-W
Minimum value)/U
Minimum value* 100%=29.6%; Maximum deviation ratio is: (maximum-minimum value)/minimum value * 100%=(7.9-3.35)/3.35=135.8%.
| U1 | U2 | U3 |
| 7.9 | 6.8 | 5.6 |
| V1 | V2 | V3 |
| 4.25 | 3.35 | 4.36 |
| W1 | W2 | W3 |
| 5.65 | 6.44 | 7.32 |
Table 1
Because each sub-winding impedance deviation ratio of secondary winding is too big; For each inverter unit of coupled high-voltage variable-frequency and variable-speed system; It is too big to be exactly that internal impedance differs; The output voltage deviation ratio is big too during each inverter unit operation, thereby influences the running quality of high-voltage variable-frequency and variable-speed system.
Summary of the invention
To the too big problem of deviation ratio of the impedance of existing each secondary winding of phase shifting transformer, the present invention proposes a kind of new phase shifting transformer, comprises a sub-high pressure winding and two groups of above secondary low-voltage windings; Every group of said secondary low-voltage winding be the certain electrical degree of phase shift to each other, and said secondary low-voltage winding is along the transformer core axial distribution; It is characterized in that every mutually said sub-high pressure winding is composed in parallel by the sub-winding more than 2, insulation gap is opened and is axially evenly distributed up and down along transformer core between each sub-winding.
According to said structure; On high-tension side each phase winding is divided into several sub-windings that are connected in parallel and they are axially evenly distributed up and down along transformer core; Make the winding magnetic potential distribution of primary side and secondary side become even more relatively, thereby the impedance deviation ratio of each secondary winding has just been reduced greatly.
Wherein reasonable scheme is that every mutually said sub-high pressure winding is composed in parallel by 3 said sub-windings.Like this can transformer core axial in following three positions arrange a said sub-high pressure winding equably.
Because the present invention has These characteristics and advantage, technical scheme of the present invention for this reason can be applied among the phase shifting transformer.
Description of drawings
Fig. 1 is the structure chart of existing product;
Fig. 2 is the product structure figure that uses technical scheme of the present invention.
Embodiment
Below in conjunction with accompanying drawing the product of using technical scheme of the present invention is further described.
As shown in Figure 2, phase shifting transformer comprises a sub-high pressure winding AX and three groups of secondary low-voltage windings (U, V, W); Every group of said secondary low-voltage winding be the certain electrical degree of phase shift to each other, and said secondary low-voltage winding is along the transformer core axial distribution.
Every mutually said sub-high pressure winding AX comprises that 3 sub-windings (AX1, AX2, AX3) compose in parallel, and insulation gap is opened and axially evenly distributed up and down along transformer core between each sub-winding.
According to said structure; On high-tension side each phase winding is divided into 3 sub-windings that are connected in parallel and they are axially evenly distributed up and down along transformer core; Make the winding magnetic potential distribution of primary side and secondary side become even relatively, thereby the impedance deviation ratio of each secondary winding has just been reduced greatly.Certainly, can also on high-tension side each phase winding be divided into the sub-winding that is connected in parallel more than 3, and then winding magnetic potential with secondary side be distributed become even more relatively, but its production cost also improves accordingly.
The first side winding of the phase shifting transformer of structure made shown in Figure 1 is improved according to structure shown in Figure 2, and adopted the common test mode of identical standard to test the resistance value of each secondary side winding, the result who obtains is as shown in table 2 below.
Can be found out that by test data though still there is difference in the resistance value between each secondary side winding, its difference reduces greatly, wherein each sub-winding deviation ratio is: (U
Maximum-U
Minimum value)/U
Minimum value* 100%=9.0%; V
Maximum-V
Minimum value)/U
Minimum value* 100%=13.4%; W
Maximum-W
Minimum value)/U
Minimum Value* 100%=3.5%; Maximum deviation ratio is=(maximum-minimum value)/minimum * 100%=(4.5-3.66)/3.66=23%.
| U1 | U2 | U3 |
| 4.50 | 4.28 | 4.13 |
| V1 | V2 | V3 |
| 4.12 | 3.66 | 4.15 |
| W1 | W2 | W3 |
| 4.25 | 4.36 | 4.40 |
Table 2
Can find out by above-mentioned data; Be evenly arranged on the core post owing to the employing parallel-connection structure of primary side high pressure winding and with winding; Balance to the secondary winding impedance has had significant change, the difference of its impedance reduce to transformer and with the operation of frequency conversion equipment performance more reliably is provided.
Claims (2)
1. phase shifting transformer comprises a sub-high pressure winding and two groups of above secondary low-voltage windings; Every group of said secondary low-voltage winding be the certain electrical degree of phase shift to each other, and said secondary low-voltage winding is along the transformer core axial distribution; It is characterized in that every mutually said sub-high pressure winding is composed in parallel by the sub-winding more than 2, insulation gap is opened and is axially evenly distributed up and down along transformer core between each sub-winding.
2. phase shifting transformer according to claim 1 is characterized in that, every mutually said sub-high pressure winding is composed in parallel by 3 said sub-windings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120403511XU CN202230853U (en) | 2011-10-14 | 2011-10-14 | Phase-shifting transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120403511XU CN202230853U (en) | 2011-10-14 | 2011-10-14 | Phase-shifting transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202230853U true CN202230853U (en) | 2012-05-23 |
Family
ID=46081431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120403511XU Expired - Lifetime CN202230853U (en) | 2011-10-14 | 2011-10-14 | Phase-shifting transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202230853U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103515076A (en) * | 2013-09-12 | 2014-01-15 | 上海查尔斯光电科技有限公司 | Phase conversion transformer |
| CN104425112A (en) * | 2013-09-04 | 2015-03-18 | 台达电子企业管理（上海）有限公司 | Transformer |
| CN106449068A (en) * | 2016-12-19 | 2017-02-22 | 保定天威集团特变电气有限公司 | 3*36 pulse wave phase-shifting rectifier transformer |
| CN110246661A (en) * | 2019-04-23 | 2019-09-17 | 大禹电气科技股份有限公司 | A kind of phase-shifting transformer for parallel-operation expansion |
-
2011
- 2011-10-14 CN CN201120403511XU patent/CN202230853U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104425112A (en) * | 2013-09-04 | 2015-03-18 | 台达电子企业管理（上海）有限公司 | Transformer |
| EP2846335A3 (en) * | 2013-09-04 | 2015-04-08 | Delta Electronics (Shanghai) Co., Ltd. | Transformer |
| CN103515076A (en) * | 2013-09-12 | 2014-01-15 | 上海查尔斯光电科技有限公司 | Phase conversion transformer |
| CN106449068A (en) * | 2016-12-19 | 2017-02-22 | 保定天威集团特变电气有限公司 | 3*36 pulse wave phase-shifting rectifier transformer |
| CN110246661A (en) * | 2019-04-23 | 2019-09-17 | 大禹电气科技股份有限公司 | A kind of phase-shifting transformer for parallel-operation expansion |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120523 |
|
| CX01 | Expiry of patent term |