CN102510151A - 252-slot and 14-pole asymmetric four-branch two-layer three-phase stator winding - Google Patents
252-slot and 14-pole asymmetric four-branch two-layer three-phase stator winding Download PDFInfo
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- CN102510151A CN102510151A CN2011103706963A CN201110370696A CN102510151A CN 102510151 A CN102510151 A CN 102510151A CN 2011103706963 A CN2011103706963 A CN 2011103706963A CN 201110370696 A CN201110370696 A CN 201110370696A CN 102510151 A CN102510151 A CN 102510151A
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Abstract
The invention relates to a stator winding, in particular to a 14-pole and 252-slot asymmetric four-branch two-layer three-phase stator winding. Two layers, namely an upper layer and a lower layer, of wire rods embedded in stator slots are connected at the end parts by a straight end-to-end joint sleeve, an oblique end-to-end joint sleeve and a short copper ring for forming coils in three pitches, by changing winding pitches, and are regularly connected in series for forming four branches, , and the four branches are connected in parallel for forming the stator winding. According to the stator winding disclosed by the invention, the new asymmetric four-branch two-layer three-phase stator winding which does not meet the condition of a symmetric winding is formed by changing the arrangement law and the connection form of the 14-pole and 252-slot winding. The stator winding disclosed by the invention can not only realize excellent performances of a motor, increase voltage grade, increase the number of the slots which can be selected by a stator of the 14-pole motor and greatly upgrade a motor design technology, but also reduce the axial length of the motor, reduce the height of a factory building and save the construction cost of a power station. The stator winding disclosed by the invention is suitable for 14-pole and 252-slot salient pole synchronous motors, in particular for the field of large-scale water-pumping energy storage motors.
Description
Technical field
The present invention relates to the double-deck threephase stator winding of extremely asymmetric four branch roads of a kind of 252 grooves 14.
Background technology
The pumped storage motor frequently moves under generating and electronic two kinds of operating modes, and its direction of rotation is opposite, and rotating speed is higher usually, so its designing technique is unique.And along with the increase gradually of capacity, design difficulty is increasing.Capacity is that 300MW grade, rotating speed are that 428.6r/min (14 utmost point) pumped storage motor application is extensive, and the hydraulic turbine superior performance of this rotating speed.But the stator winding of 14 utmost point motors symmetry parallel branch number can only be 1,2,7 and 14; Corresponding rated voltage is 13.8kV and 15.75kV; Under the constant situation of other physical dimensions; Length unshakable in one's determination is than the nearly 500mm of the length of four branch road stator winding, thereby makes the manufacturing cost of motor and the construction cost increase in power station.If adopt four branch road Unsymmetrical Winding, then exist the differing in size of electric potential of branch, phase place difference and winding to connect problems such as difficulty.The motor performance of four branch road stator winding is superior, and cost is low, but winding does not satisfy symmetric condition, is the branch road Unsymmetrical Winding.
Summary of the invention
It is short to the purpose of this invention is to provide a kind of axial length, can reduce factory building height, saves the double-deck threephase stator winding of extremely asymmetric four branch roads of 252 grooves 14 of power plant construction expense.The double-deck threephase stator winding of extremely asymmetric four branch roads of this 252 grooves 14; Upper and lower layer line rod by embedding in the stator slot is connected to form three kind pitches in the end by direct join headgear, oblique also headgear and short copper ring through changing winding pitch; Pitch is the coil of 14 slot pitches, 15 slot pitches and 16 slot pitches; Make it series connection and form four branch roads; Article four, form this kind stator winding after the branch road parallel connection, this stator winding is: top bar (1), lower bar (2), through change pitch in the end by direct join headgear (3), tiltedly and headgear (4) and short copper ring (5) be connected to form the coil (6) of three kinds of pitches; Be connected to form four branch roads again, form the double-deck three-phase symmetrical wave of asymmetric four branch roads winding after four branch road parallel connections.
Motor mainly is made up of stator and rotor two big parts.Stator is made up of out frame, stator core and stator winding.The large-size machine stator winding is generally single-turn winding, by embed bar formula line rod in the stator coring groove in the end by and headgear be connected to form coil, some coils series connection also form branch road through the interpolar connecting line, parallel connection forms stator winding between branch road.Stator winding is a critical component of accomplishing energy converting between mechanical in the motor, and the constant flux cutting stator winding that excitation winding is provided, and induced potential therein produce electric energy, accomplish the conversion of mechanical energy to electric energy.
The present invention is for 428.6r/min (14 utmost point) motor, and a way of its symmetrical stator winding can only be 1,2,7 and 14.The present invention is winding arrangement regulation and the type of attachment that changes 14 utmost points, 252 grooves, forms a kind of new double-deck threephase stator winding of asymmetric four branch roads that do not satisfy the symmetric winding condition.
Asymmetric four branch road windings are compared with traditional symmetrical branch road winding, and its advantage is that the superior function of pump turbine under 428.6r/min given full play in (1); (2) the motor rated voltage can be brought up to 18kV by the 13.8kV and the 15.75kV of 7 branch road windings; (3) the optional groove number of expansion motor stator promotes the design of electrical motor technology significantly; (4) under the constant situation of other physical dimensions of motor, length unshakable in one's determination adopts the nearly 500mm of weak point of 7 branch road stator winding, thereby makes the manufacturing cost of motor and the construction cost minimizing in power station.
The present invention is applicable to salient pole synchronous electric machine, especially is fit to 428.6r/min (14 utmost point), 252 groove pumped storage motors.
Adopt stator winding of the present invention; Make the stator coil of conventional single pitch (pitch is 15 slot pitches); Become the stator coil of three kinds of pitches (being respectively 14 slot pitches, 15 slot pitches and 16 slot pitches); Form asymmetric four branch roads after the coil series connection, these four branch road parallel connections constitute a phase winding.This has not only changed the rule that is connected of top bar and lower bar, and has changed the connection rule of coil in the branch road.In order to investigate the performance of stator winding of the present invention, need to analyze its degree of asymmetry and calculate the stator winding breadth coefficient through the electromotive force star graph, judge from principle whether this kind winding configuration is feasible; Judge through drawing the stator winding connection layout whether feasible the wire insertion technology property of this kind winding is connected with interpolar.For 428.6r/min (14 utmost point), 252 grooves, four branch road stator winding; The breadth coefficient of stator winding is 0.95614, and chording factor branch road in twos is identical, is respectively 0.9622 and 0.9686; Average winding coefficient is 0.9230; The voltage degree of asymmetry is 0.6696%, promptly can be connected into the asymmetric but three symmetrical stator winding of branch road through the adjustment coil span, and the stator winding winding diagram is as shown in Figure 1.Though the more conventional winding of visible stator winding wiring is complicated from figure, but can realize fully.Stator winding of the present invention not only can make motor performance superior, improves electric pressure; Enlarge the optional groove number of stator of 14 utmost point motors, the design of electrical motor technology is promoted significantly, the more important thing is the axial length that can reduce motor; Reduce the height of factory building, save the construction cost in power station.The present invention is applicable to 428.6r/min (14 utmost point) 252 geosynclinal convex electrode synchronization electromotors, especially is fit to the large-scale pumped storage power machine field.
Description of drawings
The double-deck threephase stator winding connection of Fig. 1 asymmetric four branch roads of the present invention figure
Line rod numbering that Fig. 2 need connect for A facies tract winding and connection rule table
Line rod numbering that Fig. 3 need connect for X facies tract winding and connection rule table
Line rod numbering that Fig. 4 need connect for B facies tract winding and connection rule table
Line rod numbering that Fig. 5 need connect for Y facies tract winding and connection rule table
Line rod numbering that Fig. 6 need connect for C facies tract winding and connection rule table
Line rod numbering that Fig. 7 need connect for Z facies tract winding and connection rule table
Embodiment:
Be illustrated in figure 1 as the extremely asymmetric four branch road stator winding of a kind of 252 grooves 14; Upper and lower layer line rod by embedding in the stator slot is connected to form three kind pitches in the end by direct join headgear, oblique also headgear and short copper ring through changing winding pitch; Pitch is the coil of 14 slot pitches, 15 slot pitches and 16 slot pitches; Coil series connection forms coil groups, connects into four branch roads again; Article four, form this kind stator winding after the branch road parallel connection, stator winding is: top bar 1, lower bar 2, through change pitch in the end by direct join headgear 3 with tiltedly and headgear 4 and short copper ring 5 be connected to form the coil 6 of three kinds of pitches; Be connected to form four branch roads again, form the double-deck three-phase symmetrical wave of asymmetric four branch roads winding after four branch road parallel connections.Be drawn out to outside the machine hole through collector ring and bus.Though only need design a kind of line rod of pitch, its end connects except direct join headgear and oblique and headgear, also need increase short copper ring.
The type of attachment of the double-deck threephase stator winding of asymmetric four branch roads is: the stator winding of motor is 60 ° of facies tracts of three-phase, i.e. A, X, B, Y, C, six facies tracts of Z are respectively like Fig. 2～shown in Figure 7.Among the figure; Roman number numbering I-VII is motor number of pole-pairs numbering; Columns under every facies tract is every extremely every phase groove number, and what provide among the figure is every phase winding groove that up and down the layer line rod is corresponding number, has provided the numbering of row in last column of every figure; Numbering 1-6 representes top bar, numbering 1 '-6 ' expression lower bar.Among each facies tract figure; Need when the line rod extremely being connected into coil to be adjusted to pitch 14 slot pitches and 16 slot pitches except IV; Other are 15 slot pitches to the coil span that is formed by connecting extremely down; Corresponding link to each other of layer line rod each row lower bar identical with numerical digit that respectively list of number of pole-pairs I-III 1,3,5 respectively lists the corresponding branch road of formation that links to each other of each row of the layer line rod lower bar identical with numerical digit with IV to being numbered of the utmost point; Corresponding link to each other of layer line rod each row lower bar identical with numerical digit that respectively list of number of pole-pairs V-VII 2,4,6 respectively lists corresponding each row of the layer line rod lower bar identical with numerical digit another branch road of formation that links to each other with IV to being numbered of the utmost point, and two branch roads of every facies tract formation form 12 branch roads altogether; Four branch road parallel connections of A, X facies tract form the A phase winding; Four branch road parallel connections of B, Y facies tract form the B phase winding, and four branch road parallel connections of C, Z facies tract form the C phase winding, have so just formed double-deck three phase windings of asymmetric four branch roads.
Claims (2)
1. the double-deck threephase stator winding of extremely asymmetric four branch roads of a groove 14; It is characterized in that: the upper and lower layer line rod by embedding in the stator slot is connected to form three kind pitches in the end by direct join headgear, oblique also headgear and short copper ring through changing winding pitch; Pitch is the coil of 14 slot pitches, 15 slot pitches and 16 slot pitches; Make it series connection and form four branch roads; Article four, form this kind stator winding after the branch road parallel connection, this stator winding is: top bar (1), lower bar (2), through change pitch in the end by direct join headgear (3), tiltedly and headgear (4) and short copper ring (5) be connected to form the coil (6) of three kinds of pitches; Be connected to form four branch roads again, form the double-deck three-phase symmetrical wave of asymmetric four branch roads winding after four branch road parallel connections.
2. the double-deck threephase stator winding of extremely asymmetric four branch roads of a kind of 252 grooves 14 according to claim 1; It is characterized in that: the type of attachment of the double-deck threephase stator winding of asymmetric four branch roads is: the stator winding of motor is 60 ° of facies tracts of three-phase; Be A, X, B, Y, C, six facies tracts of Z, Roman number numbering I-VII is motor number of pole-pairs numbering among the figure, and the columns under every facies tract is every extremely every phase groove number; What provide among the figure is every phase winding groove that up and down the layer line rod is corresponding number; Last column at every figure has provided the numbering that is listed as, and numbering 1-6 representes top bar, numbering 1 '-6 ' expression lower bar.Among each facies tract figure; Need when the line rod extremely being connected into coil to be adjusted to pitch 14 slot pitches and 16 slot pitches except IV; Other are 15 slot pitches to the coil span that is formed by connecting extremely down; Corresponding link to each other of layer line rod each row lower bar identical with numerical digit that respectively list of number of pole-pairs I-III 1,3,5 respectively lists the corresponding branch road of formation that links to each other of each row of the layer line rod lower bar identical with numerical digit with IV to being numbered of the utmost point; Corresponding link to each other of layer line rod each row lower bar identical with numerical digit that respectively list of number of pole-pairs V-VII 2,4,6 respectively lists corresponding each row of the layer line rod lower bar identical with numerical digit another branch road of formation that links to each other with IV to being numbered of the utmost point, and two branch roads of every facies tract formation form 12 branch roads altogether; Four branch road parallel connections of A, X facies tract form the A phase winding; Four branch road parallel connections of B, Y facies tract form the B phase winding, and four branch road parallel connections of C, Z facies tract form the C phase winding, have so just formed double-deck three phase windings of asymmetric four branch roads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110370696 CN102510151B (en) | 2011-11-21 | 2011-11-21 | 252-slot and 14-pole asymmetric four-branch two-layer three-phase stator winding |
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| CN 201110370696 CN102510151B (en) | 2011-11-21 | 2011-11-21 | 252-slot and 14-pole asymmetric four-branch two-layer three-phase stator winding |
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| CN102510151A true CN102510151A (en) | 2012-06-20 |
| CN102510151B CN102510151B (en) | 2013-10-02 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280906A (en) * | 2013-05-22 | 2013-09-04 | 蒋胜千 | Wiring method for increasing number of parallel-connection branches of three-phase alternating current motor double-layer stator winding |
| CN103580342A (en) * | 2013-11-22 | 2014-02-12 | 哈尔滨电机厂有限责任公司 | Connection method for unconventionality symmetric windings |
| CN104184239A (en) * | 2014-09-04 | 2014-12-03 | 东方电气集团东方电机有限公司 | Connecting method of non-60-degree phase belt symmetric windings |
| CN114567106A (en) * | 2022-03-18 | 2022-05-31 | 东方电气(德阳)电动机技术有限责任公司 | Six-pole two-branch six-outlet double-layer lap winding end wiring structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005304271A (en) * | 2004-04-16 | 2005-10-27 | Hitachi Ltd | Synchronous generator and wind-power generation system |
| CN201282376Y (en) * | 2008-10-10 | 2009-07-29 | 哈尔滨电机厂有限责任公司 | Tri-branch double-layer three-phase unsymmetrical branch stator winding |
| CN101610011A (en) * | 2009-07-21 | 2009-12-23 | 泰豪科技股份有限公司 | The brushless three-phase synchronous generator for ship fractional slot winding |
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2011
- 2011-11-21 CN CN 201110370696 patent/CN102510151B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005304271A (en) * | 2004-04-16 | 2005-10-27 | Hitachi Ltd | Synchronous generator and wind-power generation system |
| CN201282376Y (en) * | 2008-10-10 | 2009-07-29 | 哈尔滨电机厂有限责任公司 | Tri-branch double-layer three-phase unsymmetrical branch stator winding |
| CN101610011A (en) * | 2009-07-21 | 2009-12-23 | 泰豪科技股份有限公司 | The brushless three-phase synchronous generator for ship fractional slot winding |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280906A (en) * | 2013-05-22 | 2013-09-04 | 蒋胜千 | Wiring method for increasing number of parallel-connection branches of three-phase alternating current motor double-layer stator winding |
| CN103580342A (en) * | 2013-11-22 | 2014-02-12 | 哈尔滨电机厂有限责任公司 | Connection method for unconventionality symmetric windings |
| CN103580342B (en) * | 2013-11-22 | 2015-11-18 | 哈尔滨电机厂有限责任公司 | The method of attachment of unconventional symmetric winding |
| CN104184239A (en) * | 2014-09-04 | 2014-12-03 | 东方电气集团东方电机有限公司 | Connecting method of non-60-degree phase belt symmetric windings |
| CN104184239B (en) * | 2014-09-04 | 2016-08-31 | 东方电气集团东方电机有限公司 | A kind of method of attachment of non-60 ° of facies tract symmetric windings |
| CN114567106A (en) * | 2022-03-18 | 2022-05-31 | 东方电气(德阳)电动机技术有限责任公司 | Six-pole two-branch six-outlet double-layer lap winding end wiring structure |
| CN114567106B (en) * | 2022-03-18 | 2023-09-01 | 东方电气(德阳)电动机技术有限责任公司 | Double-deck lap winding end wiring structure of six two branch road six outgoing lines of six |
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| CN102510151B (en) | 2013-10-02 |
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