CN204721128U - A kind of Novel alternating-current generator stator bar - Google Patents
A kind of Novel alternating-current generator stator bar Download PDFInfo
- Publication number
- CN204721128U CN204721128U CN201520331981.8U CN201520331981U CN204721128U CN 204721128 U CN204721128 U CN 204721128U CN 201520331981 U CN201520331981 U CN 201520331981U CN 204721128 U CN204721128 U CN 204721128U
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- strand
- stator bar
- transposition
- root
- current generator
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Abstract
The utility model discloses a kind of Novel alternating-current generator stator bar, it is characterized in that: described stator bar can carry out traditional various transposition forms in groove portion, in end without the need to and strand is carried out short circuit in parallel by headgear, but to connect one to one according to every root strand of pitch to not collinear rod; The strand of described stator bar can connect with the copper sheet equal with strand sectional area in junction, and arranges the glass tape pad being used for reinforced insulation protection, and every root strand is surrounded by insulating varnish in advance on request.This Novel stator line rod is applicable to the various transposition forms of traditional strand, and the circulation between strand significantly reduces compared to tradition transposition scheme, can effectively reduce circulation loss under different loads current conditions.
Description
Technical field
The utility model relates to alternator design and manufacturing technology field, is specifically related to a kind of Novel stator line rod being applicable to alternating current generator.
Background technology
The stator winding of alternating current generator is generally by many strands and around forming bar line stick.Because every root strand is in the alternating magnetic field of groove portion and end complexity, therefore except load current, also having two kinds of extra currents by the electric current of line rod, is be present in the circulation between loop that eddy current in each root strand and any two strands form respectively.The generation of eddy current makes strand interior point electric current distribution uneven, causes additional copper loss to increase, but substantially can solve eddy current problem according to the flat type copper wire of thinner thickness.And circulation is because the electromotive force of each strand in parallel is unequal caused, because each strand in parallel is in the position different with end, groove portion, cause the stray field of strand interlinkage different, the leakage inductance electromotive force namely produced is also different, therefore in each strand loop, defines electrical potential difference and cause circulation.This circulation adds the supplementary load loss of stator, causes each strand temperature rise different, easily causes strand to occur local hot spot, reduce the efficiency of alternating current machine, cause extreme influence to the safe operation of alternating current machine.
In order to reduce the loss caused by circulation, usually in the Design and manufacture of stator bar, adopt strand transposition technology.Traditional interchanging method that alternating current generator adopts mainly contain 360 ° of full transpositions, 0 °/360 °/0 ° add the transposition of void transposition section, less than strand interchanging methods such as 360 ° of transpositions, 0 °/360 °/0 ° prolongation transposition, 0 °/540 °/0 ° of transpositions, these interchanging methods are widely used in manufacturing and designing of large-scale alternating current generator, in suppression circulation, obtain good effect, and strand transposition technology is also in constantly development.
In existing transposition technology, the online excellent groove portion of strand carries out traditional transposition, online stick end be by and headgear makes all strands of same root line rod short circuits in parallel, therefore circulation is only present in same root line rod.But when load current changes, circulation loss increases obviously.
For solving the problem, the utility model proposes a kind of new solution.
Summary of the invention
Technical problem to be solved in the utility model is: how to design a kind of Novel alternating-current generator stator bar, thus when load current changes, circulation and circulation loss can be made significantly to reduce, ensure the safe operation of motor, reach the object of energy-saving and emission-reduction.
To achieve the above object of the invention, the technical scheme that the utility model adopts is: provide a kind of Novel alternating-current generator stator bar, it is characterized in that: described stator bar can carry out traditional various transposition forms in groove portion, in end without the need to and strand is carried out short circuit in parallel by headgear, but to connect one to one according to every root strand of pitch to not collinear rod.
According to Novel alternating-current generator stator bar provided by the utility model; it is characterized in that: the strand of described stator bar can connect with the copper sheet equal with strand sectional area in junction; and the glass tape pad being used for reinforced insulation protection is set, every root strand is surrounded by insulating varnish in advance on request.
In sum, alternator frame line rod tool provided by the utility model has the following advantages: 1, when load current changes, line rod circulation and circulation loss obviously reduce; 2, the strand of line stick end connects one to one, and is applicable to 360 ° of transpositions entirely, less than traditional transposition forms such as 360 ° of transpositions, void transposition and prolongation transpositions; 3, growing along with technology, the manufacture craft of line rod is not difficult to realize, and owing to adopting this line rod significantly can reduce circulation loss, therefore has larger use meaning.
Accompanying drawing explanation
Fig. 1 is the stereogram of groove portion strand transposition;
Fig. 2 is that the transposition of groove portion strand is curved;
Fig. 3 is the stereogram that end strand connects;
Fig. 4 is in Fig. 3
m-M 'front view (getting 6 strands);
Fig. 5 is that strand junction is provided with glass fiber pad;
Fig. 6 is lower bar strand reference numeral figure;
Fig. 7 is top bar strand reference numeral figure.
In all schematic diagrames, this line rod comprises even number root strand, but this line rod is applicable to the stator bar of any root strand, any transposition form in the syndeton of end.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, strand transposition in groove portion is as follows:
(1) strand is transversely arranged is some rows, and the present invention is for two row's strands, and every layer line rod comprises 18 strands;
(2) left bank strand and right row's strand extend along strand direct of travel with different angles respectively, the direct of travel of left bank strand is for be inclined upwardly along notch direction (20), and the direct of travel of right row's strand is downward-sloping along bottom land direction (22);
(3) first strand (10) on left bank top is shifted to strand (9) top, first, right row top along direct of travel through first transposition curved (21a), angle of inclination changes, until consistent with right row's strand direct of travel;
(4) left bank second strand (11) is shifted in step (3) along direct of travel process transposition curved (21b) and is shifted to above the strand of right row from left bank, and angle of inclination changes, until consistent with right row's strand direct of travel;
(5) step (3)-(4) are repeated, until left bank strand has all replaced;
(6) right row's strand is consistent with the transposition form of left bank strand, and direction is different, until right row's strand has all replaced.
As shown in Figure 3, strand Connection Step in end is as follows:
(1) be numbered according to the every root strand specifically put in order to not collinear stick end;
(2) strand in not collinear rod is selected to connect according to winding pitch, the strand of top bar (24) reverses along bottom land direction (22) end wherein, and the strand of lower bar (23) reverses along notch direction (20);
(3) upper and lower layer line rod strand is reversed at different node, make the strand in line rod form one-to-one relationship;
(4) according to " head and the tail are corresponding " principle, the strand after alignment is extended in opposite directions, and with the copper sheet equal with strand sectional area, corresponding strand is connected in strand junction;
(5) top bar (24), lower bar (23) strand in the other end is performed step (3)-(4);
(6) remain line rod and perform step (2)-(4), until the connection work of end strand completes.
Fig. 4 is in Fig. 3
m-M 'close-up schematic view (only getting 6 strands), the numbering figure that Fig. 6 and Fig. 7 is lower floor respectively, top bar strand is corresponding.Get in lower bar 23 be numbered 6 strand and top bar 24 in the strand that is numbered be example, the concrete Connection Step of end strand is described.Strand 6 reverses at A point, and strand reverses at C point, and both windup-degrees are symmetric about the axis.Strand 6 linearly extends and reverses at B point, and in like manner, strand linearly extends and reverses at D point, and both windup-degrees are symmetric about the axis.Finally, two strands extend in opposite directions and connect at the E point copper sheet of equal sectional area, and arrange glass fiber pad in strand junction, protect for reinforced insulation.
For a 180MW hydraulic generator, stator bar groove portion adopts not enough transposition form, utilizes the strand circulation loss of three-dimensional finite element method to stator bar to calculate.Result shows, in nominal load situation, the result of calculation of every root line rod circulation loss of tradition transposition stator bar and Novel stator line rod is adopted to be respectively 324.28W and 58.32W, along with the change of load current, the former line rod circulation loss amplitude of variation is larger, and the amplitude of variation of the line rod circulation loss of the latter is less, therefore under different load current condition, adopt Novel stator line rod can effectively reduce line rod circulation loss.
Adopt this novel provided Novel alternating-current generator stator bar to be applicable to the various interchanging methods of traditional strand arrangement, the advantage of various interchanging method can be taken into account, effectively can suppress the circulation in stator bar, reduce the circulation loss in strand.Growing along with technology, line rod manufacture craft is not difficult to realize, and adopts this stator bar significantly can reduce circulation loss, provides reference value to a certain extent, have larger use meaning to the energy-saving design of alternating current generator.
The utility model further describes the embodiment by accompanying drawing illustrated embodiment, but should not be construed as protection range of the present utility model and be only limitted to described example.
Claims (2)
1. a Novel alternating-current generator stator bar, it is characterized in that: described stator bar can carry out traditional various transposition forms in groove portion, in end without the need to and strand is carried out short circuit in parallel by headgear, but to connect one to one according to every root strand of pitch to not collinear rod.
2. stator bar according to claim 1; be primarily characterized in that: the strand of described stator bar can connect with the copper sheet equal with strand sectional area in junction; and the glass tape pad being used for reinforced insulation protection is set, every root strand is surrounded by insulating varnish in advance on request.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520331981.8U CN204721128U (en) | 2015-05-22 | 2015-05-22 | A kind of Novel alternating-current generator stator bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520331981.8U CN204721128U (en) | 2015-05-22 | 2015-05-22 | A kind of Novel alternating-current generator stator bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204721128U true CN204721128U (en) | 2015-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520331981.8U Expired - Fee Related CN204721128U (en) | 2015-05-22 | 2015-05-22 | A kind of Novel alternating-current generator stator bar |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110661387A (en) * | 2018-06-29 | 2020-01-07 | 上海鸣志电器股份有限公司 | Wire stranding method for air gap winding |
| CN113783336A (en) * | 2021-09-13 | 2021-12-10 | 哈尔滨理工大学 | Stator bar with four rows of strand wires integrally transposed and four rows of strand wires integrally transposed method for steam turbine generator |
-
2015
- 2015-05-22 CN CN201520331981.8U patent/CN204721128U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110661387A (en) * | 2018-06-29 | 2020-01-07 | 上海鸣志电器股份有限公司 | Wire stranding method for air gap winding |
| CN110661387B (en) * | 2018-06-29 | 2022-04-05 | 上海鸣志电器股份有限公司 | Wire stranding method for air gap winding |
| CN113783336A (en) * | 2021-09-13 | 2021-12-10 | 哈尔滨理工大学 | Stator bar with four rows of strand wires integrally transposed and four rows of strand wires integrally transposed method for steam turbine generator |
| CN113783336B (en) * | 2021-09-13 | 2022-05-13 | 哈尔滨理工大学 | Stator bar with four rows of strand wires integrally transposed and four rows of strand wires integrally transposed method for steam turbine generator |
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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 |
Granted publication date: 20151021 Termination date: 20180522 |
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| CF01 | Termination of patent right due to non-payment of annual fee |