CN220822839U - Large-scale wind-driven generator stator converging ring - Google Patents
Large-scale wind-driven generator stator converging ring Download PDFInfo
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- CN220822839U CN220822839U CN202321978093.6U CN202321978093U CN220822839U CN 220822839 U CN220822839 U CN 220822839U CN 202321978093 U CN202321978093 U CN 202321978093U CN 220822839 U CN220822839 U CN 220822839U
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- stator
- ring
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- phase
- neutral
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 57
- 230000007935 neutral effect Effects 0.000 claims abstract description 47
- 229910052802 copper Inorganic materials 0.000 claims abstract description 45
- 239000010949 copper Substances 0.000 claims abstract description 45
- 238000004804 winding Methods 0.000 claims abstract description 37
- 239000011810 insulating material Substances 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 241001604129 Polydactylus Species 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical group [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Windings For Motors And Generators (AREA)
Abstract
The utility model relates to the field of large-scale generators, in particular to a large-scale wind driven generator stator confluence ring which comprises a stator phase confluence ring structure, wherein the stator phase confluence ring structure comprises a stator phase confluence ring and a copper bar end plate, the stator phase confluence ring is pre-bent into a circular ring shape by a copper bar, two ends of the stator confluence ring are opened, and the opening size of the stator confluence ring is determined according to parallel branches of stator windings. Compared with the prior art, the stator phase confluence ring length is reduced by 1/a, so that the consumption of copper bars can be reduced by 1/a times, and the cost is reduced remarkably. Secondly, the sectional area of the neutral bus ring of the stator is reduced, and the consumption of the copper bar of the neutral bus ring is reduced by 1/2 compared with the prior art. Third, because the stator confluence ring is blocked and does not form a whole circular ring, the stator branch current can only be led out from one direction, the loss of the confluence ring caused by loop current is reduced, the calorific value of the confluence ring is further reduced, and the service life of the stator confluence ring insulating material is prolonged.
Description
Technical Field
The utility model relates to the field of large-scale generators, in particular to a stator confluence ring of a large-scale wind driven generator.
Background
The stator bus ring is also called a bus (copper ring lead), and is a key electrical connector for connecting a stator winding outgoing line and a power cable in a large-scale generator. The stator bus ring is usually a copper ring prefabricated by copper bars with rectangular cross sections, and joints at two ends of the copper ring are welded and connected into a whole circle. According to the connection method of the three-phase stator winding of the generator, the stator bus ring can be correspondingly divided into a stator phase bus ring and a stator neutral bus ring. According to the electromagnetic scheme design of the generator, the number of parallel branches of each phase winding of the generator is a (a=1, 2, 3, 4, 5 and 6.) and is uniformly distributed in the circumferential direction, each branch of the stator winding is provided with two wire outlets, therefore, the number of branch outgoing wires of each phase stator winding is 2a, one end of the branch outgoing wire of the stator winding a under the phase is welded on a copper ring, a copper bar end plate is welded at the wire outlet position of the copper ring, the end plate is provided with a through hole, a power cable is fixed on the copper ring by using a bolt and a fastener, stator current is output by the winding outgoing wire through the copper ring and the power cable, and the copper ring is the stator phase converging ring. And welding the lead wires at the other ends of 3a branches of the three-phase stator winding on another copper ring, wherein the copper ring is the stator neutral confluence ring.
Along with the continuous increase of the single-machine capacity of the wind driven generator, the stator current of the generator also rises sharply, and the alternating current density of the stator confluence rings is increased to 1.5 times than the direct current density under the influence of the skin effect and the proximity effect, so that the quantity and the sectional area of the copper bars of the stator confluence rings are also increased more and more for reducing the heat productivity and the temperature rise of the confluence rings, and the cost rises sharply. Secondly, the sectional areas of the copper bars selected by the stator neutral confluence ring and the stator phase confluence ring are the same, and the current of the stator neutral confluence ring is zero in theory under the normal operation working condition of the generator, so that the copper bars with the same sectional areas are wasted. In addition, the a-branch leads are welded on the stator bus ring, and the induced potential of each branch winding cannot be identical, so that a voltage difference exists between the a-branch leads, and under the voltage, annular current is generated through an annular loop formed by the stator bus ring, and the current does work by not flowing through a load, but only flows circularly in the stator bus ring, thus being called circulating current. The circulation increases the loss of the generator, reduces the efficiency, and simultaneously can aggravate the heating of the generator and shorten the service life of the stator insulation.
At present, a stator converging ring is a copper ring which is usually prefabricated by copper bars with rectangular cross sections, joints at two ends of the copper ring are welded and connected into a whole circle, copper bar end plates are welded at the outgoing line positions of the stator phase converging ring, and the copper bar end plates are provided with through holes for fixing power cables by bolts and fasteners. Secondly, the specifications of the copper bars selected by the stator neutral bus ring and the stator phase bus ring are the same. Compared with the traditional cable lead wire structure, the cable lead wire has the defects of large quantity, large specification, large welding difficulty, unfixed cable fixation and the like, and the copper bar bus ring has obvious advantages in the aspects, so that the copper bar bus ring is widely applied.
In view of the above, the present utility model provides a stator bus ring of a large wind driven generator.
Disclosure of utility model
The utility model aims to provide a stator converging ring of a large-sized wind driven generator aiming at the defects of the prior art.
In order to solve the technical problems, the following technical scheme is adopted:
the stator confluence ring of the large wind driven generator comprises a stator phase confluence ring structure, wherein the stator phase confluence ring structure comprises a stator phase confluence ring and a copper bar end plate, the stator phase confluence ring is pre-bent into a circular ring shape by a copper bar, two ends of the stator confluence ring are opened, and the opening size of the stator confluence ring is determined according to parallel branches of stator windings;
and the outgoing lines of the parallel branches of the stator windings are symmetrically distributed on two sides of the stator phase converging ring by taking the midpoint of the opening of the copper bar end plate and the midpoint of the opening of the stator phase converging ring as an axis, and the outgoing lines of the parallel branches of the stator windings and the stator phase converging ring are welded into a whole.
Further, the parallel branch of the stator winding is a, and the opening size of the stator bus ring is 1/a x 360 degrees.
Further, the two ends of the stator bus ring are not welded.
Further, the copper bar end plates are welded at symmetrical positions of the opening midpoints of the stator phase bus rings.
Further, the copper bar end plate is provided with a through hole for fixing the power cable.
The stator neutral phase bus ring structure comprises a stator neutral phase bus ring, the stator neutral phase bus ring is pre-bent into a circular ring shape by copper bars, and the copper bar cross section area of the stator neutral phase bus ring is smaller than that of the stator phase bus ring;
And two ends of the stator neutral phase bus ring are opened, and the opening size of the stator neutral phase bus ring is determined according to the parallel branch of the stator winding.
Further, the parallel branch of the stator winding is a, the number of the parallel branches of the three-phase stator winding is 3a, and the opening size of the stator neutral bus ring is 1/3a x 360 degrees.
Further, the position of the stator neutral bus ring is determined according to the opening position of the stator neutral phase bus ring, so that 3a stator outgoing lines of the parallel branch of the three-phase stator winding can be welded on the stator neutral bus ring.
Due to the adoption of the technical scheme, the method has the following beneficial effects:
The utility model relates to a large-scale wind driven generator stator confluence ring which has a reasonable and reliable structure, can reduce the consumption of copper bars and the material cost, and can reduce the loss and the heating value generated by circulation in the stator confluence ring, thereby reducing the temperature rise of the stator confluence ring and prolonging the service life of the insulating material of the stator confluence ring. Compared with the prior art, the stator phase confluence ring length is reduced by 1/a, so that the consumption of copper bars can be reduced by 1/a times, and the cost is reduced remarkably. Secondly, the sectional area of the neutral bus ring of the stator is reduced, and the consumption of the copper bar of the neutral bus ring is reduced by 1/2 compared with the prior art. Third, because the stator confluence ring is blocked and does not form a whole circular ring, the stator branch current can only be led out from one direction, the loss of the confluence ring caused by loop current is reduced, the calorific value of the confluence ring is further reduced, and the service life of the stator confluence ring insulating material is prolonged.
Drawings
The utility model is further described below with reference to the accompanying drawings:
fig. 1 is a schematic structural diagram of a stator phase bus ring structure according to an embodiment of the utility model.
Fig. 2 is a schematic left-view structure of a stator phase bus ring structure according to an embodiment of the present utility model.
Fig. 3 is a schematic structural diagram of a stator neutral bus ring structure according to an embodiment of the utility model.
Fig. 4 is a schematic left-view structure of a stator neutral bus ring structure according to an embodiment of the present utility model.
Detailed Description
The present utility model will be further described in detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the detailed description and specific examples, while indicating the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.
Referring to fig. 1-2, a stator confluence ring of a large wind driven generator comprises a stator phase confluence ring structure, wherein the stator phase confluence ring structure comprises a stator phase confluence ring 1 and a copper bar end plate 2, the stator phase confluence ring 1 is pre-bent into a circular ring shape by a copper bar, two ends of the stator confluence ring are opened, and the opening size of the stator confluence ring is determined according to parallel branches of stator windings.
As a further explanation of this embodiment, the copper bar end plate and the midpoint of the opening of the stator phase bus ring 1 are taken as axes, so that the outgoing lines of the parallel branches of the stator windings in the circumferential direction are symmetrically distributed on two sides of the stator phase bus ring 1, and the outgoing lines 3 of the parallel branches of the stator windings and the stator phase bus ring 1 are welded together.
As a further illustration of this embodiment, the parallel branch of the stator winding is a, and the opening size of the stator bus ring is 1/a×360°.
As a further explanation of this embodiment, the stator bus ring is not welded at both ends.
As a further explanation of the present embodiment, the copper bar end plates are welded at symmetrical positions of the open midpoints of the stator phase bus ring 1.
As a further explanation of this embodiment, the copper bar end plate is provided with a through hole for fixing the power cable. The copper bar end plate is connected with a power cable (not shown in the figure) to draw out current.
Specifically, this embodiment is described taking a certain phase of stator winding parallel branch number a=4 as an example. The parallel branch of the stator winding is 4, the opening size of the stator bus ring is 1/4 x 360 degrees=90°, namely, the opening angle is 90 degrees
In this embodiment, the copper bars are pre-bent into an open circular shape from 50×8mm copper bars.
In this embodiment, the stator phase bus ring 1 is positioned according to the position of the copper bar end plate, so that the outgoing lines 3 of the parallel branches of the 4 stator windings can be symmetrically welded on two sides of the stator phase bus ring 1.
As a further explanation of the present embodiment, referring to fig. 3 and 4, the stator bus ring of the large wind power generator further includes a stator neutral bus ring structure including a stator neutral phase bus ring 4, the stator neutral phase bus ring 4 is pre-bent into a circular ring shape by copper bars, and the copper bar cross-sectional area of the stator neutral phase bus ring 4 is smaller than that of the stator phase bus ring 1.
As a further explanation of the present embodiment, the two ends of the stator neutral phase bus ring 4 are opened, and the opening size of the stator neutral phase bus ring 4 is determined according to the parallel branch of the stator winding.
As a further explanation of this embodiment, the number of parallel branches of the stator winding is a, the number of parallel branches of the three-phase stator winding is 3a, and the opening size of the stator neutral bus ring is 1/3a×360°.
In this embodiment a=4, the opening size of the stator neutral bus ring is 30 °.
As a further explanation of the present embodiment, the position of the stator neutral bus ring is determined according to the opening position of the stator neutral phase bus ring 4, so that 3a stator lead wires 5 of the parallel branch of the three-phase stator winding can be welded on the stator neutral bus ring.
In this embodiment, the copper bars of the stator neutral phase bus ring 4 are pre-bent into an open circular shape from 25×8mm copper bars.
In the present embodiment, the position of the stator neutral bus ring is determined according to the opening position, so that 12 stator outgoing lines 5 can be welded on the stator neutral bus ring. The neutral point is not led out, namely, the stator neutral bus ring does not need to be connected with a cable.
The above is only a specific embodiment of the present utility model, but the technical features of the present utility model are not limited thereto. Any simple changes, equivalent substitutions or modifications made on the basis of the present utility model to solve the substantially same technical problems and achieve the substantially same technical effects are encompassed within the scope of the present utility model.
Claims (8)
1. A large-scale aerogenerator stator converging ring, its characterized in that: the stator phase bus ring structure comprises a stator phase bus ring and a copper bar end plate, wherein the stator phase bus ring is pre-bent into a circular ring shape by a copper bar, two ends of the stator bus ring are opened, and the opening size of the stator bus ring is determined according to parallel branches of a stator winding;
and the outgoing lines of the parallel branches of the stator windings are symmetrically distributed on two sides of the stator phase converging ring by taking the midpoint of the opening of the copper bar end plate and the midpoint of the opening of the stator phase converging ring as an axis, and the outgoing lines of the parallel branches of the stator windings and the stator phase converging ring are welded into a whole.
2. The large wind power generator stator bus ring as set forth in claim 1, wherein: the parallel branch of the stator winding is a, and the opening size of the stator bus ring is 1/a x 360 degrees.
3. The large wind power generator stator bus ring as set forth in claim 1, wherein: and two ends of the stator bus ring are not welded.
4. The large wind power generator stator bus ring as set forth in claim 1, wherein: and the copper bar end plates are welded at symmetrical positions of the opening midpoints of the stator phase converging rings.
5. The large wind power generator stator bus ring as set forth in claim 4 wherein: the copper bar end plate is provided with a through hole for fixing the power cable.
6. A large wind power generator stator bus ring as in any one of claims 1-5 wherein: the stator neutral phase bus ring structure comprises a stator neutral phase bus ring, the stator neutral phase bus ring is pre-bent into a circular ring shape by copper bars, and the sectional area of the copper bars of the stator neutral phase bus ring is smaller than that of the stator phase bus ring;
And two ends of the stator neutral phase bus ring are opened, and the opening size of the stator neutral phase bus ring is determined according to the parallel branch of the stator winding.
7. The large wind turbine stator bus ring of claim 6, wherein: the stator winding parallel branch is a, the number of the three-phase stator winding parallel branch is 3a, and the opening size of the stator neutral bus ring is 1/3a x 360 degrees.
8. The large wind turbine stator bus ring of claim 6, wherein: and determining the position of the stator neutral bus ring according to the opening position of the stator neutral phase bus ring, so that 3a stator outgoing lines of the parallel branch of the three-phase stator winding can be welded on the stator neutral bus ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321978093.6U CN220822839U (en) | 2023-07-26 | 2023-07-26 | Large-scale wind-driven generator stator converging ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321978093.6U CN220822839U (en) | 2023-07-26 | 2023-07-26 | Large-scale wind-driven generator stator converging ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220822839U true CN220822839U (en) | 2024-04-19 |
Family
ID=90697629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321978093.6U Active CN220822839U (en) | 2023-07-26 | 2023-07-26 | Large-scale wind-driven generator stator converging ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220822839U (en) |
-
2023
- 2023-07-26 CN CN202321978093.6U patent/CN220822839U/en active Active
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