CN102403855B - Sine duplex lap winding for synchronous generator - Google Patents
Sine duplex lap winding for synchronous generator Download PDFInfo
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- CN102403855B CN102403855B CN2011103082194A CN201110308219A CN102403855B CN 102403855 B CN102403855 B CN 102403855B CN 2011103082194 A CN2011103082194 A CN 2011103082194A CN 201110308219 A CN201110308219 A CN 201110308219A CN 102403855 B CN102403855 B CN 102403855B
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Abstract
The invention relates to a sine duplex lap winding for a synchronous generator. The sine duplex lap winding for the synchronous generator is characterized in that the generator has 30 stator slots, 4 electrodes and 3 phases; and a stator iron core is inclined for about 1.07 slot distance, six hollow slots of the 30 slots are uniformly distributed, and the rest 24 slots are arranged in that three-phase windings are arranged according to the method of two slots per electrode and phase to form the three-phase duplex lap winding, wherein the number of turns of each coil of the three-phase winding is the same, and the pitch of each coil is 5. The line voltage and phase voltage of the three-phase generator armature winding formed by the way theoretically have no third harmonic and third harmonic of the odd times, has no fifth harmonic and seventh harmonic, the tooth harmonic is greatly weakened, the contents of eleventh harmonic and thirteenth harmonic are small, the line-voltage and phase-voltage sinusoidal waveform distortion rates are not more than 1 percent, thereby meeting the high requirement of a three-phase four-line system precision power supply for that the line-voltage and phase-voltage sinusoidal waveform distortion rates are not more than 1 percent, and no coils are arranged in the six hollow slots of the stator iron core, which is beneficial for the axial ventilation and heat dissipation of the generator.
Description
Technical field
The present invention relates to a kind of AC Electrical Machine Winding, especially a kind of synchronous generator sine duplex lap winding.
Background technology
As everyone knows, when three-phase synchronous generator is made three-phase four-wire power supply, require the sinusoidal sex distortion rate of generator line, phase voltage all less, in some precision voltage source, require the sinusoidal sex distortion rate of line voltage phase voltage all to be not more than 1%.
In order to reach this high request, the design of its armature winding is one of key technology, in a kind of number of stator slots, is in 30 groove 4 utmost point 3 phase generators, every extremely every phase groove number
q=5/2, the design of armature winding sine is met difficulty, because requiring three-phase four-wire power supply, conventional design is taked the winding of short distance 2/3, can eliminate 3 times and odd-multiple harmonic wave for several times, but 5, 7 subharmonic are very large, can't eliminate 3 and odd-multiple harmonic wave and 5 for several times simultaneously, 7 subharmonic, and weaken significantly other subharmonic, and the sinusoidal two layer winding of disclosed △-Y and the sinusoidal two layer winding of concentric type unequal-turn in the past, because strict turn ratio relation is arranged, the theoretical number of turn and the actual number of turn are difficult to accomplish unified, in this motor, in fact can not adopt, necessarily require with new winding construction design, in order to can eliminate 3 and odd-multiple harmonic wave and 5 for several times simultaneously, 7 subharmonic, and weaken significantly other subharmonic, the sinusoidal sex distortion rate of line voltage while meeting this generator three-phase four-wire power supply and phase voltage waveform all is not more than 1% high request.
summary of the invention
Purpose of the present invention is exactly that number of poles is 4 utmost points for a kind of three-phase generation machine stator 30 grooves, and its every extremely every phase groove is
q=5/2, and invent the two repeatedly windings of a kind of three phase sine, this sine duplex lap winding is to wait the equidistant double-layer lap winding of circle, the technique tradition realizes easily, can guarantee that generator line, the sinusoidal sex distortion rate of phase voltage waveform all are not more than 1% requirement.
The present invention is achieved like this, for 30 grooves, vacate a groove every 4 grooves, vacate altogether 6 grooves, lower coil not in these 6 dead slots, arrange double-layer coil in all the other 24 grooves, the mode that each coil upper strata is 2 by every extremely every phase groove number distributes, and each coil turn is equal, and the pitch of each coil is 5, each coil lower floor has also determined position like this, has determined the groove at place.Like this layout with regard to make 3 and odd-multiple harmonic wave for several times be zero, 5 subharmonic are also zero, the skewed stator core slot degree is 1.07 stator slot distances simultaneously, so not only can weaken slot ripples, also 7 electromotive force harmonic waves are also weakened is zero simultaneously, ingehious design by this winding construction and be different from conventional skewed stator core slot, just make 3 times and odd-multiple several electromotive force harmonic wave and 5 in the armature winding induced potential, it is zero that 7 electromotive force harmonic waves all weaken, 11, 13 subharmonic content are also very little, and slot ripples has also been weakened greatly, content is atomic, its line voltage, the sinusoidal sex distortion rate of the floating voltage of phase voltage all is not more than 1%, this is a kind of generator fractional-slot sine duplex lap winding, reached the purpose of invention.
The advantage of this sine duplex lap winding is:
1, the winding equidistant double-layer lap winding of circle such as be short distance, technique is fully the same with the traditional double winding that changes, easily enforcement;
2, this sine duplex lap winding wire voltage, the sinusoidal sex distortion rate of phase voltage waveform all are not more than 1%, can be used in the accurate generator power supply of three-phase four-wire system;
3, in 30 groove 4 utmost point 3 phase generators, no matter be to adopt the double-deck positive chorded winding of r-Y or adopt the double-deck positive chorded winding of concentric type unequal-turn, all can not reach line voltage, the sinusoidal sex distortion rate of phase voltage waveform all is not more than 1% requirement, and the double-deck positive chorded winding of r-Y is not identical with the double-deck sinusoidal umber of turn of concentric type unequal-turn, there is strict number of turn proportionate relationship, the theoretical number of turn and the actual number of turn are difficult to unified, complex process, be difficult to reach design effect, in this fractional-slot generator, in fact can not adopt, and the equidistant theory and practice of the circle degree of unification such as sine duplex lap winding of the present invention are high, technique is very simple again, solve fractional-slot and realized the double-deck just difficult problem of chorded winding.
4, in this sine duplex lap winding stator core, uniform dead slot is arranged, than the motor of nothing dead slot, axial ventilation is better, and heat radiation is better, and temperature reduces, and efficiency improves.
The accompanying drawing explanation
Fig. 1 is three-phase synchronous generator sine duplex lap developed winding diagram of the present invention.
Embodiment
As shown in Figure 1, the motor stator slot number is 30 grooves, the sine duplex lap developed winding diagram that number of poles is 4 utmost point 3 synchronised generators.
In Fig. 1, 6 dead slots are arranged in 30 grooves, lower coil not in these 6 dead slots, these dead slots are equally distributed, 4 grooves of being separated by between dead slot, these 6 dead slots are 2, 7, 12, 17, 22, 27 these 6 grooves, all the other 24 grooves are 2 to distribute the groove phase place of three phase windings by every extremely every phase groove number, method is conventional method, be that the upper strata of coil is by aa, zz, bb, xx, cc, yy arranges phase place, the number of turn of each coil equates, the pitch of each coil also equates, pitch is all 5, the lower floor of every like this groove has all also determined regularly by the limit, upper strata, except 6 dead slots, in all the other these 24 grooves, be all two repeatedly double-deckers, copper factor equates, as shown in Figure 1, the u phase winding is by uu
o8 coils are in series, and they are 1-6,3-8,9-14,10-15, 16-21,18-23,24-29,25-30, u
1u
oby 1,24, groove is drawn respectively, the v phase winding is by vv
o8 coils are in series, and they are 6-11,8-13,14-19,15-20, 21-26,23-28,29-4,30-5, v
1v
oby 6,29, groove is drawn respectively, the w phase winding is by ww
o8 coils are in series, and they are 11-16,13-18,19-24,20-25, 26-1,28-3,4-9,5-10, w, w
oby 11,4 grooves, drawn respectively,
Above-mentioned uu
o, vv
o, ww
othe u of three phase windings
o, v
o, w
obe linked into neutral point N, the lead-out wire of three-phase four-wire system is labeled as u, v, w, n; As shown in Figure 1;
Simultaneously, the necessary skewed slot of stator core, the skewed slot degree is 1.07 stator slot distances, above-mentioned three phase windings are exactly to be arranged in the stator core with this skewed slot degree;
The three-phase four-wire system armature winding formed like this is a kind of fractional-slot sine duplex lap winding, and its line voltage has been eliminated in the waveform of phase voltage 3 times and 3 odd multiple subharmonic, 5 subharmonic have also been eliminated, 7 subharmonic, 11 times, 13 subharmonic content are also very little, slot ripples has also weakened greatly, content is minimum, its line voltage, and the aberration rate calculated value of the waveform sine of phase voltage is 0.8072%, all be not more than 1%, specifically see harmonic content result of calculation table:
Harmonic content result of calculation table:
Can meet as can be seen here the three-phase four-wire system precision voltage source line, the sinusoidal sex distortion rate of phase voltage waveform all are not more than to 1% high request, the armature winding of this structure, also make stator core that 6 uniform dead slots are arranged, be convenient to stator core axial ventilation, reduce temperature rise, the armature winding technique of this structure is fully the same with conventional two windings that change, and implements easily.
The threephase armature winding temperature rise of this structure is low, and harmonic wave is few, and noise is little, and efficiency is high, line voltage, and the sinusoidal sex distortion rate of phase voltage waveform is not more than 1%, and promotional value is arranged.This in 30 groove 4 utmost point 3 phase generators, oblique 1.07 slot pitches of stator core, uniform empty 6 grooves, the circles such as 3 phase fraction groove winding coils, pitch is all two repeatedly structures of 5, has reached the purpose of invention.
Claims (1)
1. a synchronous generator sine duplex lap winding, it is characterized in that several 30 grooves of generator unit stator groove, number of poles 4 utmost points, 3 phases, oblique 1.07 slot pitches of stator core, be evenly distributed with 6 dead slots in 30 grooves, arrange three phase windings by 2 groove methods of every extremely every phase in all the other 24 grooves, each coil turn of three phase windings equates, the pitch of each coil is 5, form the two repeatedly windings of three-phase, in the line voltage of the threephase generator armature winding formed like this and phase voltage, all do not have in theory 3 times and 3 odd-multiple harmonic wave for several times, there is no 5 subharmonic, there is no 7 subharmonic, slot ripples has also obtained very large weakening, 11 times, 13 subharmonic content are also very little, line voltage, the sinusoidal sex distortion rate of phase voltage waveform all is not more than 1%, can meet the three-phase four-wire system precision voltage source to line, the sinusoidal sex distortion rate of phase voltage waveform all is not more than 1% high request, there is no coil in 6 dead slots in stator core, be conducive to the axial ventilation heat radiation of generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103082194A CN102403855B (en) | 2011-10-12 | 2011-10-12 | Sine duplex lap winding for synchronous generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103082194A CN102403855B (en) | 2011-10-12 | 2011-10-12 | Sine duplex lap winding for synchronous generator |
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| Publication Number | Publication Date |
|---|---|
| CN102403855A CN102403855A (en) | 2012-04-04 |
| CN102403855B true CN102403855B (en) | 2013-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011103082194A Active CN102403855B (en) | 2011-10-12 | 2011-10-12 | Sine duplex lap winding for synchronous generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108110929B (en) * | 2018-02-07 | 2024-09-24 | 江西清华泰豪三波电机有限公司 | Three-phase generator and power generation system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87102626A (en) * | 1986-04-04 | 1987-10-14 | 日本电气株式会社 | Induction motor |
| FR2714773B1 (en) * | 1993-12-31 | 1996-01-26 | Renault | Synchronous motor with permanent magnets and electronic commutation. |
| CN101019296A (en) * | 2004-09-15 | 2007-08-15 | 西门子公司 | Synchronous motor |
| CN101019295A (en) * | 2004-09-15 | 2007-08-15 | 西门子公司 | Synchronous motor |
| CN202364085U (en) * | 2011-10-12 | 2012-08-01 | 泰豪科技股份有限公司 | Synchronous generator sine duplex lap winding |
-
2011
- 2011-10-12 CN CN2011103082194A patent/CN102403855B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87102626A (en) * | 1986-04-04 | 1987-10-14 | 日本电气株式会社 | Induction motor |
| FR2714773B1 (en) * | 1993-12-31 | 1996-01-26 | Renault | Synchronous motor with permanent magnets and electronic commutation. |
| CN101019296A (en) * | 2004-09-15 | 2007-08-15 | 西门子公司 | Synchronous motor |
| CN101019295A (en) * | 2004-09-15 | 2007-08-15 | 西门子公司 | Synchronous motor |
| CN202364085U (en) * | 2011-10-12 | 2012-08-01 | 泰豪科技股份有限公司 | Synchronous generator sine duplex lap winding |
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| CN102403855A (en) | 2012-04-04 |
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