CN102290898A - Duplex winding structure of megawatt double-fed wind driven generator rotor - Google Patents
Duplex winding structure of megawatt double-fed wind driven generator rotor Download PDFInfo
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- CN102290898A CN102290898A CN201110232958XA CN201110232958A CN102290898A CN 102290898 A CN102290898 A CN 102290898A CN 201110232958X A CN201110232958X A CN 201110232958XA CN 201110232958 A CN201110232958 A CN 201110232958A CN 102290898 A CN102290898 A CN 102290898A
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Abstract
The invention provides a duplex winding structure of a megawatt double-fed wind driven generator rotor. A rotor slot is a semi-closed slot and rotor windings are lap winding type random windings. The windings comprise two sets of three-phase symmetrical windings, wherein the parallel branch number of the first set of windings is 1, the parallel branch number of the second set of windings is 2, and the corresponding phases of the two sets of windings are connected in series and then form star-connected outgoing lines. The first set of windings are double-layer lap windings with different turns and unequal distances so as to improve non-sinusoidal wave magnetic potential formed by wave winding hard coils; the second set of windings are short pitch lap windings which are three-phase and symmetrical, the mutual difference is 120-degree electrical degree; and the second set of windings have short pitch, can save wire rods and can be used for resisting the sinusoidal current distortion provided by a frequency converter. According the invention, the defects of poor generating quality, more connecting thimbles, poor reliability and the like existing in the conventional wave winding hard coils can be improved, so that the magnetic potential harmonic wave can be greatly decreased and rotor magnetic potential wave form can be highly sinusoidal; and furthermore, the harmonic wave loss can be decreased, heating can be lessened, temperature rise can be reduced, and the power generating quality, efficiency, reliability and economy can be improved.
Description
Technical field
The present invention relates to a kind of motor windings, especially a kind of rotor double-winding structure of MW class double-fed wind power generator.
Background technology
In the MW class double-fed wind power generator, conventional rotor winding adopts the hard pitch of the laps form of wave winding, and there is following shortcoming in this winding:
1 rotor core must adopt semi-open slot, and notch is big, and slot ripples is big;
The hard pitch of the laps manufacturability of 2 wave windings is poor, and headgear is many, exists hidden danger of quality many;
3 wave winding leakage reactances are little, and inverter current power supply harmonic wave suppresses poor;
4 wave winding mmf wave sines are poor, and the rotor magnetic potential waveform contains abundant harmonic wave, and loss is big, and heating is serious, temperature rise, and generator poor quality.
Summary of the invention
Purpose of the present invention just provides a kind of rotor double-winding structure of MW class double-fed wind power generator, improve the generating poor quality that the hard pitch of the laps of conventional wave winding exists, and headgear is many, and the defective of poor reliability significantly reduces the harmonics of magnetic force, rotor magnetic potential waveform height sineization, to reduce harmonic loss, reduce heating, reduce temperature rise, improve the generating quality and raise the efficiency raising reliability and economy.
Technical scheme of the present invention is: a kind of MW class double-fed wind power generator rotor double-winding structure, comprise the rotor of processing line ring recess, the groove number of rotor coil groove is 48 grooves, number of poles is 4 utmost points, the number of phases is 3 phases, the flute profile of rotor coil groove is the semi-closed port flat-bottom slot, arranges in the rotor coil groove that two overlap the three symmetrical diffusing embedding mush windings of lap winding types; First cover, three phase windings are the excited work winding, its version is not for waiting the not equidistant bilayer of circle winding that changes, whenever, be composed in series by 4 groups of pitch of the laps, 4 pitch of the laps are arranged in every group, wherein the pitch of 3 pitch of the laps is 10, the pitch of 1 pitch of the laps is 6, the number of turn of 4 every circles of coil from left to right is respectively 2 circles, 3 circles, 2 circles and 1 circle, whenever the number of turn that is in series is 32 circles, A phase AX winding pitch of the laps is: 2-12,3-13,4-14,5-11,24-14,25-15,26-16,23-17,26-36,27-37,28-38,29-35,48-38,1-39,2-40,47-41; The number of turn of each coil is respectively: 2,3,2,1,2,3,2,1,2,3,2,1,2,3,2,1; The component law of B phase BY coil and C phase CZ pitch of the laps is identical with A phase AX pitch of the laps, A, and B, 120 ° of electrical degrees of C three-phase mutual deviation constitute three-phase symmetric winding; Second cover, three phase windings are the single layer winding of short pitch, and a way that whenever is in parallel is 2, and every 4 pitches of route are 3, and the number of turn is 1 coil formation; The a of second cover, three phase windings first branch road mutually is labeled as the a1x1 winding, is made up of 1-4,10-7, four coils of 13-16,22-19; Second branch road is labeled as the a2x2 winding, is made up of 25-28,34-31, four coils of 37-40,46-43; B phase, c are identical with a phase composition form, a, and b, 120 ° of electrical degrees of c mutual deviation constitute three symmetrical single layer winding; After a1x1 winding and the parallel connection of a2x2 winding, connect with the first cover winding AX; After b1y1 winding and the parallel connection of b2y2 winding, connect with the first cover winding BY; After c1z1 winding and the parallel connection of c2z2 winding, connect with the first cover winding CZ; And the x1 of the second cover winding, x2, y1, y2, z1, z2 is connected together, form mid point O, do not draw, and the A that draws, B, C end are labeled as U, V respectively, W, thus star connection formed, and U, V, W are the mark that generator amature has the three-phase symmetric winding leading-out terminal of double-winding structure.
Rotor winding three-phase symmetry, 120 ° of electrical degrees of mutual deviation, rotor adopts semi-enclosed slot, and the rotor winding adopts the diffusing embedding winding of lap winding type, and winding has two cover three-phase symmetric windings, and the first cover winding is the work winding, the second cover winding is the leakage reactance winding.The first cover winding construction form is not for waiting the not equidistant bilayer of circle winding that changes, because it does not wait the not equidistant characteristics of circle, the magnetic potential that this cover winding is formed is sinusoidal magnetic potential, has improved the non-sinusoidal waveform magnetic potential that wave winding rigid line circle forms, and has improved the generating quality of generator; The second cover winding is the repeatedly winding of short pitch, three is symmetrical, 120 ° of electrical degrees of mutual deviation, this cover winding pitch is little, economize with wire rod, the parallel branch number of this cover winding is 2 times of the first cover winding, thereby cross-sectional area of conductor long-pending be 1/2 of the first cover winding, so that overlapping, the first cover winding and second is connected into star after the corresponding phase winding of winding is connected, the phase relation no standard of the corresponding phase winding between the second cover winding and the first cover winding, and this cover winding does not participate in forming rotating magnetic potential, promptly do not participate in excited work yet, only as the winding leakage reactance, because this overlaps sealing in of winding, the leakage reactance of rotor winding increases, the inverter supply current harmonics is resisted, the sine of rotor excitation current is improved, and the second cover winding is a single layer winding, and the number of turn is few, pitch is short, sectional area of wire only is 1/2 of the first cover winding, so the space of the second cover winding occupied groove is very little, first to overlap the winding suffered influence that takes up space very little.
The invention has the beneficial effects as follows: the rotor winding is made of two cover mush windings, has improved the defective of conventional rotor rigid line circle wave winding; The flute profile of rotor coil groove is that semi-closed port flat-bottom slot and the 2nd cover winding seal in, rotor winding leakage reactance increases, the increase of this leakage reactance makes the harmonic wave of the alternating current that frequency converter is provided the rotor winding obtain opposing, the sine of rotor current improves, improved the craftmanship of inverter supply, because the minimizing of current harmonics, excited work is optimized more; The harmonics of magnetic force significantly reduces, and rotor magnetic potential waveform height sineization to reduce harmonic loss, reduces and generates heat, and reduces temperature rise, improves the generating quality and raises the efficiency raising reliability and economy.
Description of drawings
Fig. 1 is the first cover three-phase symmetric winding layout plan of the present invention.
Fig. 2 is the second cover symmetric winding layout plan of the present invention.
Fig. 3 is a double winding elementary diagram of the present invention.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
Figure 2 shows that second cover, three phase windings are the single layer winding of short pitch, a way that whenever is in parallel is 2, and every 4 pitches of route are 3, and the number of turn is 1 coil formation; The a of second cover, three phase windings first branch road mutually is labeled as the a1x1 winding, is made up of 1-4,10-7, four coils of 13-16,22-19; Second branch road is labeled as the a2x2 winding, is made up of 25-28,34-31, four coils of 37-40,46-43; B phase, c are identical with a phase composition form, a, and b, 120 ° of electrical degrees of c mutual deviation constitute three symmetrical single layer winding; After a1x1 winding and the parallel connection of a2x2 winding, connect with the first cover winding AX; After b1y1 winding and the parallel connection of b2y2 winding, connect with the first cover winding BY; After c1z1 winding and the parallel connection of c2z2 winding, connect with the first cover winding CZ; And the x1 of the second cover winding, x2, y1, y2, z1, z2 is connected together, form mid point O, do not draw, and the A that draws, B, C end are labeled as U, V respectively, W, thus star connection formed, and U, V, W are the mark that generator amature has the three-phase symmetric winding leading-out terminal of double-winding structure.
The 2nd cover winding is the embedding mush winding that looses, and three is symmetrical, 120 ° of electrical degrees of mutual deviation, and every phase winding parallel branch is counted a2=2, and every mutually every branch road has 4 coils, and coil span is 3, and span is 1-4, as shown in Figure 2; Wherein two branch roads of a phase are labeled as a1x1 and a2x2, and 4 coils of a1x1 winding are 1-4,10-7,13-16,22-19; 4 coils of a2x2 winding are 25-28,34-31,37-40,46-43; The b phase, c is identical with a phase composition form, and the number of turn of each coil is 1 circle.According to the deployment scenarios of winding, the composite magnetic power of the 2nd cover winding is 0 as can be known, does not constitute excitation field, and by the 1st cover winding burden, the 2nd cover winding only belongs to leakage reactance character to excitation field fully.
Shown in Figure 3 is the syndeton of the 1st cover winding and the 2nd cover winding, and as mentioned above, a phase winding parallel branch of the 2nd cover leakage reactance winding is counted a2=2, be to be composed in parallel by a1x1 and a2x2, being in series with the 1st cover work winding AX after the parallel connection constitutes U phase winding, V phase again, W phase composition rule is mutually just the same with U, the x1 of the 2nd cover winding mark, x2, y1, y2, z1, z2 is connected together, form mid point O, do not draw, and the A that draws, B, the C end is labeled as U respectively, V, W, the rotor double winding constitutes star connection, so U, V, W are the three-phase symmetric winding leading-out terminal mark that generator amature has double-winding structure, because the 2nd cover winding seals in, rotor winding leakage reactance increases, the increase of this leakage reactance makes the harmonic wave of the alternating current that frequency converter is provided the rotor winding obtain opposing, and the sine of rotor current improves, and has improved the craftmanship of inverter supply, because the minimizing of current harmonics, excited work is optimized more.This rotor winding is made of two cover mush windings, improved the generating poor quality that the hard pitch of the laps of conventional wave winding exists, and headgear is many, and the defective of poor reliability significantly reduces the harmonics of magnetic force, rotor magnetic potential waveform height sineization, to reduce harmonic loss, reduce heating, reduce temperature rise, improve the generating quality and raise the efficiency raising reliability and economy.
Claims (1)
1. MW class double-fed wind power generator rotor double-winding structure, comprise the rotor of processing line ring recess, it is characterized in that: the groove number of described rotor coil groove is 48 grooves, number of poles is 4 utmost points, the number of phases is 3 phases, the flute profile of rotor coil groove is the semi-closed port flat-bottom slot, arranges in the rotor coil groove that two overlap the three symmetrical diffusing embedding mush windings of lap winding types; First cover, three phase windings are the excited work winding, its version is not for waiting the not equidistant bilayer of circle winding that changes, whenever, be composed in series by 4 groups of pitch of the laps, 4 pitch of the laps are arranged in every group, wherein the pitch of 3 pitch of the laps is 10, the pitch of 1 pitch of the laps is 6, the number of turn of 4 every circles of coil from left to right is respectively 2 circles, 3 circles, 2 circles and 1 circle, whenever the number of turn that is in series is 32 circles, A phase AX winding pitch of the laps is: 2-12,3-13,4-14,5-11,24-14,25-15,26-16,23-17,26-36,27-37,28-38,29-35,48-38,1-39,2-40,47-41; The number of turn of each coil is respectively: 2,3,2,1,2,3,2,1,2,3,2,1,2,3,2,1; The component law of B phase BY coil and C phase CZ pitch of the laps is identical with A phase AX pitch of the laps, A, and B, 120 ° of electrical degrees of C three-phase mutual deviation constitute three-phase symmetric winding; Second cover, three phase windings are the single layer winding of short pitch, and a way that whenever is in parallel is 2, and every 4 pitches of route are 3, and the number of turn is 1 coil formation; The a of second cover, three phase windings first branch road mutually is labeled as the a1x1 winding, is made up of 1-4,10-7, four coils of 13-16,22-19; Second branch road is labeled as the a2x2 winding, is made up of 25-28,34-31, four coils of 37-40,46-43; B phase, c are identical with a phase composition form, a, and b, 120 ° of electrical degrees of c mutual deviation constitute three symmetrical single layer winding; After a1x1 winding and the parallel connection of a2x2 winding, connect with the first cover winding AX; After b1y1 winding and the parallel connection of b2y2 winding, connect with the first cover winding BY; After c1z1 winding and the parallel connection of c2z2 winding, connect with the first cover winding CZ; And the x1 of the second cover winding, x2, y1, y2, z1, z2 is connected together, form mid point O, do not draw, and the A that draws, B, C end are labeled as U, V respectively, W, thus star connection formed, and U, V, W are the mark that generator amature has the three-phase symmetric winding leading-out terminal of double-winding structure.
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| CN201110232958XA CN102290898A (en) | 2011-08-13 | 2011-08-13 | Duplex winding structure of megawatt double-fed wind driven generator rotor |
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| CN201110232958XA CN102290898A (en) | 2011-08-13 | 2011-08-13 | Duplex winding structure of megawatt double-fed wind driven generator rotor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475121A (en) * | 2012-06-06 | 2013-12-25 | 北京三一电机系统有限责任公司 | Rotor, doubly-fed generator and wire winding method |
| EP2717433A1 (en) * | 2012-10-05 | 2014-04-09 | ABB Oy | Rotor structure and electrical machine |
| KR101730011B1 (en) * | 2012-10-05 | 2017-04-25 | 에이비비 슈바이쯔 아게 | Rotor structure and electrical machine |
| CN108282042A (en) * | 2018-01-19 | 2018-07-13 | 华中科技大学 | A kind of speed governing permanent magnet synchronous motor based on change umber of turn |
| CN108494200A (en) * | 2018-05-21 | 2018-09-04 | 广东上水能源科技有限公司 | A kind of brushless dual-feed motor wound rotor and its manufacture craft |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60131041A (en) * | 1983-12-16 | 1985-07-12 | Toshiba Corp | Polyphase armature winding |
| JP2000287392A (en) * | 2000-01-01 | 2000-10-13 | Hitachi Ltd | Two-pole turbine generator and its rotor |
| CN2591843Y (en) * | 2002-12-30 | 2003-12-10 | 湖南工程学院 | Brushless double-feed motor |
| CN101510702A (en) * | 2009-03-27 | 2009-08-19 | 华中科技大学 | Wound rotor brushless double fed motor |
| CN202384875U (en) * | 2011-08-13 | 2012-08-15 | 江西泰豪特种电机有限公司 | Megawatt doubly-fed wind generator rotor double winding structure |
-
2011
- 2011-08-13 CN CN201110232958XA patent/CN102290898A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60131041A (en) * | 1983-12-16 | 1985-07-12 | Toshiba Corp | Polyphase armature winding |
| JP2000287392A (en) * | 2000-01-01 | 2000-10-13 | Hitachi Ltd | Two-pole turbine generator and its rotor |
| CN2591843Y (en) * | 2002-12-30 | 2003-12-10 | 湖南工程学院 | Brushless double-feed motor |
| CN101510702A (en) * | 2009-03-27 | 2009-08-19 | 华中科技大学 | Wound rotor brushless double fed motor |
| CN202384875U (en) * | 2011-08-13 | 2012-08-15 | 江西泰豪特种电机有限公司 | Megawatt doubly-fed wind generator rotor double winding structure |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103475121A (en) * | 2012-06-06 | 2013-12-25 | 北京三一电机系统有限责任公司 | Rotor, doubly-fed generator and wire winding method |
| EP2717433A1 (en) * | 2012-10-05 | 2014-04-09 | ABB Oy | Rotor structure and electrical machine |
| KR101730011B1 (en) * | 2012-10-05 | 2017-04-25 | 에이비비 슈바이쯔 아게 | Rotor structure and electrical machine |
| CN108282042A (en) * | 2018-01-19 | 2018-07-13 | 华中科技大学 | A kind of speed governing permanent magnet synchronous motor based on change umber of turn |
| CN108494200A (en) * | 2018-05-21 | 2018-09-04 | 广东上水能源科技有限公司 | A kind of brushless dual-feed motor wound rotor and its manufacture craft |
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