CN201708604U - Stator of double-fed wind turbine generator - Google Patents
Stator of double-fed wind turbine generator Download PDFInfo
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- CN201708604U CN201708604U CN2010201771121U CN201020177112U CN201708604U CN 201708604 U CN201708604 U CN 201708604U CN 2010201771121 U CN2010201771121 U CN 2010201771121U CN 201020177112 U CN201020177112 U CN 201020177112U CN 201708604 U CN201708604 U CN 201708604U
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- stator
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- slots
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model provides a stator of a double-fed wind turbine generator. The stator comprises a stator core and a stator winding, wherein a plurality of slots are formed on the stator core; the stator winding including a plurality of identical random duplex lap windings is distributed and embedded into the slots; each random duplex lap winding is formed by two coils with different pitches through compounding; the slots on the stator core adopt skewed slots, and angles are formed between the skewed slots and the axis of the stator; and the slots adopt semi-closed slots. By virtue of the generator stator adopting the structure, the electromagnetic induction efficiency of the double-fed wind turbine generator is improved, the insulating process structure of the windings is simplified, slot harmonics and other harmonics are considerably reduced, the motor noise and vibration amplitude are lowered, the operational load of an inverter is relieved, and the electrical performance of the generator is improved.
Description
Technical field
The utility model relates to a kind of power equipment, especially a kind of double-fed aerogenerator stator.
Background technology
Growing along with power industry, the use of wind-driven generator is more and more.In the prior art, the stator winding of MW class double-fed wind power generator usually adopt by some flat electromagnetic wires adopt a certain fixed knot apart from and around the moulding winding that forms, it is hard winding, for the moulding winding being fixed on the iron core of stator, interior circle or the cylindrical setting groove parallel in stator core with rotor axial, again the moulding winding is fixed in the groove unshakable in one's determination, forms generator unit stator.Groove in this structure on the stator core need be an open slot, and must be parallel with stator shaft orientation, can not be arranged to skewed slot.This structure has reduced electromagnetic induction efficient, and the insulation system complexity between the winding.
In addition, when generator is worked, along with the rotation of magnetic pole, magnetic pole produces different magnetic resistance through the teeth groove of stator during with tooth top, because the variation of air-gap reluctance can produce induced potential in stator winding, just the slot ripples electromotive force causes electromagnetic noise, produces the motor vibrations.In order to overcome this slot ripples electromotive force, reduce noise of motor and vibrations, change the groove structure of rotor or stator in the prior art usually, change the groove of rotor or stator into oblique groove, the oblique distance of general oblique groove is 0.8～1.1 slot pitch.But this structure is for the effect that reduces slot ripples and not obvious.Caused the serious phenomenon of existing generator harmonic content height, particularly slot ripples, the work load that this has just increased inverter makes the electric property of motor relatively poor.
In order to overcome above-mentioned shortcoming, the electric property that simplify insulation system between the winding, weaken slot ripples, improves double-fed wind power generator just becomes problem demanding prompt solution.
Summary of the invention
In order to address the above problem, the purpose of this utility model provides a kind of double-fed aerogenerator stator.
To achieve these goals, the technical solution of the utility model is: a kind of double-fed aerogenerator stator, comprise stator core and stator winding, in stator core, be provided with groove, described stator winding distributes and is inlaid in the groove, the described stator winding that is inlaid in the groove is made up of the two-fold winding of diffusing embedding identical more than, and the two-fold winding of described diffusing embedding is composited by the coil that two kinds of pitches do not wait.Described stator winding is made up of three identical two-fold windings of diffusing embedding, and wherein the two-fold winding of each diffusing embedding is that be separated by 9 grooves and pitch is that the be separated by coil of 4 grooves is composited by pitch.Three identical 120 ° of space electrical degrees in the two-fold winding of diffusing embedding space of described stator winding constitute three-phase symmetric winding.Groove in the described stator core is the skewed slot that intersects with axis stator.Skewed slot in the described stator core is 1/4 slot pitch with the gradient that axis stator intersects.Groove on the described stator is an end opening, the semi-closed port groove that the other end seals.
The beneficial effects of the utility model are:
1. adopt the compound winding of winding of different pitches, the resultant pitch of winding and end winding are shortened, saved electromagnetic wire, thereby reduced the overall volume of motor, weight is lighter;
2. simplified the insulating process structure between the winding;
3. improve the electromagnetic induction efficient of generator, reduced the content of slot ripples and other harmonic waves significantly;
4. reduce noise of motor and vibration amplitude, the intensification of reduction motor;
5. the work load of inverter is significantly reduced, improved the electric property of generator.
Description of drawings
Fig. 1 is the expanded view of the two-fold winding of diffusing embedding of the utility model double-fed aerogenerator stator.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Embodiment is an example with 1.5MW three-phase and quadrupole 48 groove double-fed wind power generators, and the expanded view of the two-fold winding of its diffusing embedding as shown in Figure 1.
Embodiment one:
1.5MW the stator core upper edge circumference of the double-fed wind power generator of three-phase and quadrupole 48 grooves evenly is provided with 48 flutings parallel with rotor axial; Number of poles is 4 utmost points, and first utmost point 101 is that groove 4-15, second utmost point 102 are groove 40-48 and 1-3 for groove 16-27, the 3rd utmost point 103 for groove 28-39, the 4th utmost point 104; The groove number in each utmost point territory is 12, is 3 distributed winding coils according to the number of phases, and three-phase is respectively with A phase (AX), B phase (BY), C phase (CZ) expression.Every phase winding by pitch be 9 and pitch be that two kinds of short pitch coils of 4 are formed, every phase winding is distributed with 4 coils in each utmost point territory, wherein the pitch of three coils is 9, the pitch of another coil is 4.
The coil of A phase (AX) winding is arranged among groove 4-13,5-14,6-15, the 7-11 in first utmost point territory, and four coils are electrically connected successively and form the first circle coil, and wherein the pitch of 4-13,5-14, three coils of 6-15 is 9, and the pitch of 7-11 coil is 4; Be arranged among groove 20-24,16-25,17-26, the 18-27 in second utmost point territory interior loop, four coils are electrically connected successively and form the second circle coil, 16-25 wherein, and 17-26, the pitch of three coils of 18-27 is 9, the pitch of 20-24 coil is 4; Be arranged among groove 28-37,29-38,30-39, the 31-35 in the 3rd utmost point territory interior loop, four coils are electrically connected successively and form the 3rd circle coil, and wherein the pitch of 28-37,29-38, three coils of 30-39 is 9, and the pitch of 31-35 coil is 4; Be arranged in groove 48-44,1-40,2-41, the 3-42 in the 4th utmost point territory interior loop, four coils are electrically connected successively and form the 4th circle coil, and wherein the pitch of 1-40,2-41, three coils of 3-42 is 9, and the pitch of 48-44 coil is 4.By the coil in the groove 11 is electrically connected with coil in the groove 24, first, second circle coil is formed first series circuit; By the coil in the groove 35 is electrically connected with coil in the groove 48, the 3rd, the 4th circle coil is formed second series circuit.Coil in groove 4 and the groove 28 is electrically connected, again it is electrically connected to top A; Groove 16 is electrically connected with coil in the groove 40, is electrically connected to terminal Y again, form the two branch road parallel circuits AX that first series circuit and second series circuit are in parallel.
Distribute similarly with the wiring of above-mentioned A phase winding, B phase (BY) and C the coil quantity of (CZ) winding mutually are mutually identical with electrical connection and A between winding construction and each circle coil, constituting top respectively is B, C, and end is two branch road parallel circuits BY and the CZ of Y, Z.The 120 ° of space electrical degrees in three phase winding spaces constitute three-phase symmetric winding.Can learn and realize because said structure is those skilled in the art, therefore here only the A phase winding is elaborated, B, C phase winding are repeated no more.
Adopt said structure, promptly utilize the diffusing embedding winding of the two kinds of different short pitchs two-fold winding that is composited, can simplify the insulation system between the winding coil, improve insulation property, compare with the hard winding of the traditional single short pitch of employing, the ability that the winding of this structure slackens harmonic wave is stronger, thereby has significantly reduced the content of the harmonics of magnetic force.In addition, because compound winding is shorter with respect to the hard winding resultant pitch of the single pitch of tradition, winding overhang is shorter, can save electromagnetic wire, and motor stator length vertically also can shorten, and makes the volume of motor integral body littler, and weight is lighter.
Embodiment two:
Can do further improvement for above embodiment.Owing to utilize the winding of diffusing embedding winding, so the fluting in the stator core can adopt skewed slot as generator unit stator.In particular, it is 1/4 slot pitch that skewed slot that can stator core is set to oblique distance.Notching construction unshakable in one's determination like this can weaken slot ripples, especially slackens slot ripples 11,13 times.
Embodiment three:
Further, the foregoing description is done another kind of the improvement.Fluting in the stator core is designed to semi-enclosed slot.Such structure can make the insulation effect between the winding better, improves the electromagnetic induction efficient of winding, further reduces slot ripples, thereby improves electric efficiency, reduces noise of motor and vibration amplitude, and reduces electric machine temperature rise.
Claims (6)
1. double-fed aerogenerator stator, comprise stator core and stator winding, in stator core, be provided with groove, stator winding distributes and is inlaid in the groove, it is characterized in that: the described stator winding that is inlaid in the groove is made up of the two-fold winding of diffusing embedding identical more than, and the two-fold winding of described diffusing embedding is composited by the coil that two kinds of pitches do not wait.
2. double-fed aerogenerator stator according to claim 1, it is characterized in that: described stator winding is made up of three identical two-fold windings of diffusing embedding, and wherein the two-fold winding of each diffusing embedding is that be separated by 9 grooves and pitch is that the be separated by coil of 4 grooves is composited by pitch.
3. double-fed aerogenerator stator according to claim 2 is characterized in that: three identical 120 ° of space electrical degrees in the two-fold winding of diffusing embedding space of described stator winding constitute three-phase symmetric winding.
4. according to claim 1,2 or 3 described double-fed aerogenerator stators, it is characterized in that: the groove in the described stator core is the skewed slot angled with the axis of stator.
5. double-fed aerogenerator stator according to claim 4 is characterized in that: the skewed slot gradient in the described stator core is 1/4 slot pitch.
6. double-fed aerogenerator stator according to claim 5 is characterized in that: the groove on the described stator is the semi-closed port groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201771121U CN201708604U (en) | 2010-04-30 | 2010-04-30 | Stator of double-fed wind turbine generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201771121U CN201708604U (en) | 2010-04-30 | 2010-04-30 | Stator of double-fed wind turbine generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201708604U true CN201708604U (en) | 2011-01-12 |
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ID=43445755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201771121U Expired - Lifetime CN201708604U (en) | 2010-04-30 | 2010-04-30 | Stator of double-fed wind turbine generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201708604U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814779A (en) * | 2010-04-30 | 2010-08-25 | 江西泰豪特种电机有限公司 | Double-fed aerogenerator stator |
| CN102355109A (en) * | 2011-09-26 | 2012-02-15 | 佛山市南海晶惠普电子科技有限公司 | Fractional-slot three-phase unequal-pitch sinusoidal winding of permanent magnetic servo synchronous motor |
-
2010
- 2010-04-30 CN CN2010201771121U patent/CN201708604U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814779A (en) * | 2010-04-30 | 2010-08-25 | 江西泰豪特种电机有限公司 | Double-fed aerogenerator stator |
| CN101814779B (en) * | 2010-04-30 | 2013-01-30 | 江西泰豪特种电机有限公司 | Double-fed aerogenerator stator |
| CN102355109A (en) * | 2011-09-26 | 2012-02-15 | 佛山市南海晶惠普电子科技有限公司 | Fractional-slot three-phase unequal-pitch sinusoidal winding of permanent magnetic servo synchronous motor |
| CN102355109B (en) * | 2011-09-26 | 2013-07-17 | 江西省迪普安数字功率技术发展有限公司 | Fractional-slot three-phase unequal-pitch sinusoidal winding of permanent magnetic servo synchronous motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110112 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |