CN203966786U - D.C. resistance balanced ratio approaches 0% transformer - Google Patents
D.C. resistance balanced ratio approaches 0% transformer Download PDFInfo
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- CN203966786U CN203966786U CN201420231904.0U CN201420231904U CN203966786U CN 203966786 U CN203966786 U CN 203966786U CN 201420231904 U CN201420231904 U CN 201420231904U CN 203966786 U CN203966786 U CN 203966786U
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- phase low
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- point
- voltage coil
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Links
- 238000013459 approach Methods 0.000 title claims abstract description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052802 copper Inorganic materials 0.000 claims abstract description 30
- 239000010949 copper Substances 0.000 claims abstract description 30
- 238000003801 milling Methods 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 238000003466 welding Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Coils Of Transformers For General Uses (AREA)
Abstract
The utility model discloses a kind of D.C. resistance balanced ratio and approaches 0% transformer, and A phase low-voltage coil (1), B phase low-voltage coil (2) and C phase low-voltage coil (3) are connected with A phase low pressure lug plate (4), B phase low pressure lug plate (5), C phase low pressure lug plate (6) by A phase low-voltage lead, B phase low-voltage lead, C phase low-voltage lead respectively; The tail end of A phase low-voltage coil (1), B phase low-voltage coil (2) and C phase low-voltage coil (3) is connected with X, Y, Z point on copper bar (7) respectively, groove milling (8) is arranged on the centre position of copper bar (7), O point is arranged on the centre position of copper bar (7) one sides, 2 of X, Z are in the horizontal direction about O point symmetry, Y point and O point are about groove milling (8) symmetry, three-phase resistance balance, electric current and voltage output is consistent, improve voltage regulation, and coil load sharing is even, can not cause single the excessive heating of coil load, improve transformer useful life.
Description
Technical field
The utility model relates to a kind of D.C. resistance balanced ratio and approaches 0% transformer, belongs to transformer technology field.
Background technology
As shown in Figure 1, coil afterbody and zero terminal are directly welded on X, Y, Z point and the O point of copper bar, thus the lead-in wire connected mode of the general conventional transformer using:
A phase D.C. resistance ≈ A phase coil resistance+copper bar XO resistance;
B phase D.C. resistance ≈ B phase coil resistance+copper bar YO resistance;
C phase D.C. resistance ≈ C phase coil resistance+copper bar ZY resistance+copper bar YO resistance;
Because three-phase coil resistance equates substantially, not etc., so the D.C. resistance of C phase is maximum, B's distance of just ordering to X, Y, Z from O point does not mutually take second place, A is minimum mutually, thereby cause balance of three-phase direct current resistance rate to exceed the scope 4% of national Specification, transformer capacity is larger, and its balanced ratio exceeds standard more obvious, because the words that transformer is larger, its winding wire cross section will be larger, and coil turn is fewer, and the ratio that the copper bar of connection asterism accounts for all-in resistance is just larger.
It is inhomogeneous that this kind of transformer lead connected mode can cause coil to meet to share, and causes single coil load excessive, and coil heating, easily burns coil, has reduced the useful life of transformer.
Summary of the invention
The problem existing for above-mentioned prior art, the utility model provides a kind of D.C. resistance balanced ratio to approach 0% transformer, three-phase resistance balance, electric current and voltage output is consistent, improve voltage regulation, and coil load sharing is even, can not cause single the excessive heating of coil load, improve transformer useful life.
To achieve these goals, the technical solution adopted in the utility model is: a kind of D.C. resistance balanced ratio approaches 0% transformer, comprise A phase low-voltage coil, B phase low-voltage coil and C phase low-voltage coil, A phase low-voltage coil, B phase low-voltage coil and C phase low-voltage coil are connected with A phase low pressure lug plate, B phase low pressure lug plate, C phase low pressure lug plate by A phase low-voltage lead, B phase low-voltage lead, C phase low-voltage lead respectively; The tail end of A phase low-voltage coil, B phase low-voltage coil and C phase low-voltage coil is connected with X, Y, Z point on copper bar respectively, also comprise groove milling, described groove milling is arranged on the centre position of copper bar, O point is arranged on the centre position of copper bar one side, 2 of X, Z are in the horizontal direction about O point symmetry, and Y point and O point are symmetrical about groove milling.
Further, the tail end of A phase low-voltage coil, B phase low-voltage coil and C phase low-voltage coil respectively with copper bar on X, Y, Z means of spot welds.
The beneficial effects of the utility model are: by groove milling is set in copper bar, copper bar is divided into two, respectively by tail end welding and the X of coil, Y, on Z point, by the welding of terminal zero line and O point, realized conductor in parallel, the principle of conductor parallel connection, from O point to X, Y, the D.C. resistance that Z point is upper 3 is substantially consistent, thereby guaranteed that the balanced ratio of three D.C. resistances is close to 0%, and then improved voltage regulation, three-phase output is consistent, load sharing is even, solved single coil due to the excessive phenomenon that causes coil heating of load, extended the useful life of transformer.
Accompanying drawing explanation
Fig. 1 is the transformer device structure schematic diagram of existing lead-in wire connected mode;
Fig. 2 is lead-in wire connected mode of the present utility model.
In figure: 1, A phase low-voltage coil, 2, B phase low-voltage coil, 3, C phase low-voltage coil, 4, A phase low pressure lug plate, 5, B phase low pressure lug plate, 6, C phase low pressure lug plate, 7, copper bar, 8, groove milling.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As depicted in figs. 1 and 2, a kind of D.C. resistance balanced ratio approaches 0% transformer, comprise A phase low-voltage coil 1, B phase low-voltage coil 2 and C phase low-voltage coil 3, A phase low-voltage coil 1, B phase low-voltage coil 2 and C phase low-voltage coil 3 are connected with A phase low pressure lug plate 4, B phase low pressure lug plate 5, C phase low pressure lug plate 6 by A phase low-voltage lead, B phase low-voltage lead, C phase low-voltage lead respectively; The tail end of A phase low-voltage coil 1, B phase low-voltage coil 2 and C phase low-voltage coil 3 is connected with X, Y, Z point on copper bar 7 respectively, also comprise groove milling 8, described groove milling 8 is arranged on the centre position of copper bar 7, O point is arranged on the centre position of copper bar 7 one sides, 2 of X, Z are in the horizontal direction about O point symmetry, and Y point and O point are about groove milling 8 symmetries.
Preferably, the tail end of A phase low-voltage coil 1, B phase low-voltage coil 2 and C phase low-voltage coil 3 respectively with copper bar 7 on X, Y, Z means of spot welds, this welding manner is firm.
The centre that connects copper bar 7 is arranged to groove milling 8, copper bar 7 is divided into two, respectively by coil respectively by the tail end welding of coil and X, Y, Z point, terminal zero line is welded and O point, the resistance value that the mode of being thus connected calculates is respectively:
A phase D.C. resistance ≈ A phase coil resistance+copper bar XO resistance;
B phase D.C. resistance ≈ B phase coil resistance+(copper bar O point by X point to Y point resistance+copper bar O point by Z point to Y point resistance) parallel connection;
C phase D.C. resistance ≈ C phase coil resistance+copper bar ZO resistance;
From conductor principle of parallel, from O point to X, Y, Z point, the D.C. resistance of 3 is substantially consistent, thereby the balanced ratio that has guaranteed three D.C. resistances is close to 0%, and then has improved voltage regulation.
Claims (2)
1. a D.C. resistance balanced ratio approaches 0% transformer, comprise A phase low-voltage coil (1), B phase low-voltage coil (2) and C phase low-voltage coil (3), A phase low-voltage coil (1), B phase low-voltage coil (2) and C phase low-voltage coil (3) are connected with A phase low pressure lug plate (4), B phase low pressure lug plate (5), C phase low pressure lug plate (6) by A phase low-voltage lead, B phase low-voltage lead, C phase low-voltage lead respectively; The tail end of A phase low-voltage coil (1), B phase low-voltage coil (2) and C phase low-voltage coil (3) is connected with X, Y, Z point on copper bar (7) respectively, it is characterized in that: also comprise groove milling (8), described groove milling (8) is arranged on the centre position of copper bar (7), O point is arranged on the centre position of copper bar (7) one sides, 2 of X, Z are in the horizontal direction about O point symmetry, and Y point and O point are about groove milling (8) symmetry.
2. a kind of D.C. resistance balanced ratio according to claim 1 approaches 0% transformer, it is characterized in that, the tail end of described A phase low-voltage coil (1), B phase low-voltage coil (2) and C phase low-voltage coil (3) respectively with copper bar (7) on X, Y, Z means of spot welds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420231904.0U CN203966786U (en) | 2014-05-08 | 2014-05-08 | D.C. resistance balanced ratio approaches 0% transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420231904.0U CN203966786U (en) | 2014-05-08 | 2014-05-08 | D.C. resistance balanced ratio approaches 0% transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203966786U true CN203966786U (en) | 2014-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420231904.0U Expired - Lifetime CN203966786U (en) | 2014-05-08 | 2014-05-08 | D.C. resistance balanced ratio approaches 0% transformer |
Country Status (1)
| Country | Link |
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| CN (1) | CN203966786U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485211A (en) * | 2014-12-26 | 2015-04-01 | 吴江变压器有限公司 | Low-voltage null line dual-copper-bar structure |
| CN107680785A (en) * | 2017-10-24 | 2018-02-09 | 山东达驰电气有限公司 | Control the unbalanced lead arrangement of D.C. resistance |
-
2014
- 2014-05-08 CN CN201420231904.0U patent/CN203966786U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485211A (en) * | 2014-12-26 | 2015-04-01 | 吴江变压器有限公司 | Low-voltage null line dual-copper-bar structure |
| CN107680785A (en) * | 2017-10-24 | 2018-02-09 | 山东达驰电气有限公司 | Control the unbalanced lead arrangement of D.C. resistance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 221000 Jiangsu province Xuzhou city Copper Mt. District Xuzhou high tech Industrial Development Zone Second Industrial Park Qianjiang Road North Patentee after: JIANGSU HUACHEN TRANSFORMER CO.,LTD. Address before: 221000 Jiangsu province Xuzhou city Copper Mt. District Xuzhou high tech Industrial Development Zone Second Industrial Park Qianjiang Road North Patentee before: JIANGSU HUACHEN TRANSFORMER Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141126 |