CN101562382B - Quintuple harmonic excitation brushless synchronous generator - Google Patents
Quintuple harmonic excitation brushless synchronous generator Download PDFInfo
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- CN101562382B CN101562382B CN2009101154398A CN200910115439A CN101562382B CN 101562382 B CN101562382 B CN 101562382B CN 2009101154398 A CN2009101154398 A CN 2009101154398A CN 200910115439 A CN200910115439 A CN 200910115439A CN 101562382 B CN101562382 B CN 101562382B
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Abstract
The invention discloses a quintuple harmonic excitation brushless synchronous generator, which is characterized in that: the generator consists of a main generator and an alternating current exciter, which are arranged coaxially; the direct current excitation source of a stator pole winding of the alternating current exciter is taken from a direct current source; wherein a triphase quintuple harmonic winding in a stator core of the main generator is rectified into the direct current power supply by a rectifier; the generator has 60 stators, 4 poles and three phases; and the rotor of the main generator is made into an integral salient pole type. The quintuple harmonic excitation brushless synchronous generator overcomes the shortcoming that the fundamental harmonic excitation has low short circuit current ratio and electromagnetic interference, and also overcomes the shortcoming that when the triple harmonic exciters are connected in parallel, the neutral current has great demagnetizingeffect on triple harmonic excitation magnetic field. Therefore, the quintuple harmonic excitation brushless synchronous generator has the characteristic of better electrical property than that of the fundamental harmonic excitation and the triple harmonic excitation brushless synchronous generator.
Description
Technical field
The present invention relates to a kind of power-supply device, relate in particular to a kind of quintuple harmonic excitation brushless synchronous generator.
Background technology
At present, the excitation source of the coaxial AC exciter magnetic pole of the stator of existing no-brush synchronous generator mainly contains three kinds: 1, take from main winding; 2, take from auxiliary winding in the stator; 3, take from pilot exciter.
Wherein 1, take from and do not have field power supply when there is the motor short circuit in the main winding mode and confess, also exist output voltage that defectives such as interference are arranged to main frame.
2, take from the two kinds of patterns that mainly contain of auxiliary winding in the stator, a kind of is the first-harmonic auxiliary winding identical with main motor pole number; A kind of is that number of poles is the triple-frequency harmonics winding of 3 times of main motor pole numbers; The former and main winding have interference mutually, and influenced greatly by armature reaction, the steady short multiple of motor is difficult to be equal to or greater than 3 times, and three-phase third harmonic excitation winding also has electromagnetic interference with main winding, and during parallel running of generators, the triple harmonic current of center line plays demagnetizing effect, and motor shakes job insecurity easily when in parallel.
3, take from particularly permanent magnetism pilot exciter (PMG) of pilot exciter, on electric property, overcome the defective of the first two kind, but many pilot exciters on the structure, whole motor is by main generator, AC exciter, the coaxial composition of pilot exciter three machines, and the motor axial length is long, volume increases, weight increases the weight of, and cost increases, and uses restricted in a lot of occasions.How to save pilot exciter, and it is just necessary to improve the no-brush synchronous generator of first-harmonic excitation and three ripple harmonic excitation modes on performance.
Summary of the invention
The object of the present invention is to provide a kind of quintuple harmonic excitation brushless synchronous generator, in the two machine structures that do not change existing first-harmonic excitation or third harmonic excitation, be on the basis of main generator and AC exciter two machine coaxial configurations, only change the excitation source of AC exciter magnetic pole of the stator, but be better than the mode of first-harmonic excitation or third harmonic excitation on its electric property.
The present invention is achieved like this, it is characterized by generator by main generator and AC exciter two machines coaxial composition, the DC power supply that the three-phase quintuple harmonics winding in the main generator unit stator iron core forms through rectifier rectification is taken from the DC excitation source of AC exciter magnetic pole of the stator winding; Generator unit stator 60 grooves, number of poles 4 utmost points, the number of phases 3 phases, main generator rotor is made overall salient type, between stator and rotor even air gap is arranged, and pole embrace is 0.71～0.73; The generator main winding is the concentric type two layer winding that does not wait circle, the coil groups of each concentric type is made up of 5 coils, coil span is respectively 14,12,10,8,6 from big to small, and the number of turn of each coil from big to small its turn ratio be assigned as 3: 3: 2: 1: 1, the pitch of three-phase quintuple harmonics winding was 3, and number of poles is 5 times of main winding number of poles, 3 symmetrical structures, 3 phase single layer winding, no first-harmonic content in the quintuple harmonics winding, thereby quintuple harmonics winding and main winding quadrature.
Technique effect of the present invention is: 1, axial length is short, and volume is little, and is in light weight, and cost is low; 2, the first-harmonic excitation brushless synchronous generator short-circuit current multiple than similar is big, and the ability of encouraging by force is big, and does not have electromagnetic interference with the main generator main winding, the defective that the first-harmonic excitation source can't take out when also having overcome the motor short circuit; Performance during 3, than the triple-frequency harmonics no-brush synchronous generator parallel operation of similar is better, current in middle wire does not produce demagnetizing effect to quintuple harmonics magnetic field, current in middle wire is big when having overcome the trio-time harmonic wave excitation generator parallel connection, and three magnetic fields are produced strong demagnetizing effect, cause instability in parallel, defectives such as vibration; 4, quintuple harmonic excitation has positive feedback excitation feature, i.e. load is big more, and quintuple harmonics content also increases, and the compound excitation ability is big.
Description of drawings
Fig. 1 is stator main winding figure of the present invention.
Fig. 2 is a quintuple harmonics winding diagram of the present invention.
Fig. 3 is an electrical schematic diagram of the present invention.
Embodiment
As shown in Figure 1, implement a quintuple harmonic excitation brushless synchronous generator, number of stator slots 60 grooves, number of poles 4 utmost points, be 3 phases mutually, the parallel branch number is 2, the stator main winding is a kind of concentric type two layer winding that does not wait circle, with U is that (example is only drawn 2 utmost points mutually, account for 30 grooves, the identical therewith layout of other 2 utmost points, 30 grooves) U phase winding UN is a parallel branch, it is connected in series by two coil groups switching mouths and forms, each coil groups is made up of the coil of 5 concentric types again, coil span is 14 from big to small, 12,10,8,6, the number of turn of each coil does not wait, according to pitch from big to small turn ratio be 3: 3: 2: 1: 1, the V phase, W phase winding VN and WN and 120 ° of electrical degrees of U phase winding UN mutual deviation, constitute symmetrical three phase windings, three-phase and four-line is drawn U, V, W, N, this three phase windings are formed on the double-decker in the groove, and the conductor number in every groove equates, because this layout can be eliminated 5 subharmonic, and 7 subharmonic content are also very little, not only voltage-form distortion rate is little, and help adopting 5 subharmonic excitation modes, guarantee that main winding and 5 subharmonic windings do not have electromagnetic interference, the armature reaction of main winding is not also to 5 subharmonic magnetic field degaussings, to guarantee the ability of encouraging by force of 5 subharmonic excitations.
As shown in Figure 2, a
5x
5, b
5y
5, c
5z
5Shown in, the pitch of 5 subharmonic windings is 3, and number of poles is 5 times of main winding number of poles, and 3 is symmetrical, and the circles such as each coil that form winding are equidistant, and 3 constitute single layer winding a mutually
5x
5, b
5y
5, c
5z
5Be star connection, i.e. x
5, y
5, z
5Be connected together mutually, do not draw, only draw a
5, b
5, c
5a
5, b
5, c
5Be called for short three-phase 5 subharmonic windings.Therefore in each groove of generator double-deck main winding is arranged, 5 subharmonic windings of individual layer are also arranged, but the conductor number in each groove is identical, the number of plies also is identical, and therefore the copper factor of every groove is identical.No first-harmonic electromotive force in the 5 subharmonic windings, so 5 subharmonic windings are not subjected to the interference of main winding, are not subjected to the interference of first-harmonic armature reaction, because do not contain 5 subharmonic in the main winding yet, do not contain first-harmonic in the 5 subharmonic windings yet, thus main winding and 5 subharmonic windings be quadrature all do not have electromagnetic interference mutually.Except that glitch-free advantage, the advantage that also has is, the content of 5 subharmonic also increases with load in the main field, and exciting current also increases, and this also makes 5 subharmonic magnetic fields increase, and during with the proof load size variation, 5 subharmonic energy sizes are also along with the ability that changes.This mode has overcome the fundamental wave magnetic field source and main winding has interference and is difficult to keep the shortcoming that short-circuit current multiple is equal to or greater than 3 times of rated current; Also overcome the also noisy shortcoming of three-phase third harmonic excitation winding and main winding; Current in middle wire is big when also having overcome the trio-time harmonic wave excitation generator parallel connection, and is big to the degaussing of triple-frequency harmonics magnetic field, the parallel oscillation that causes easily, the shortcoming of job insecurity.Structurally need not add the permanent magnetism pilot exciter, only need main generator and the coaxial composition of AC exciter two machines, axial length than the generator of the coaxial composition of three machines with pilot exciter is short, and the performance with the coaxial no-brush synchronous generator of three machines with permanent magnetism pilot exciter is suitable on the performance.
As shown in Figure 3, U, V, W, N are main generator three-phase main winding in the stator 1, a
5, b
5, c
5Be three-phase quintuple harmonics winding, main winding and quintuple harmonics winding are altogether down in the stator core of main generator; Z
1Be three-phase full wave rectifier circuit, E
1E
2Stator excitation winding for exciter; In the rotor 2, F
1F
2Be the field spider excitation winding of main generator, a, b, c are the exciter rotor three-phase symmetric winding, Z
2Be three-phase full wave rectifier circuit, R is a piezo-resistance; Whole generator is by a platform convex utmost point field-rotatable type main generator and platform convex utmost point pivot-rotatable type AC exciter two machines coaxial composition.On this quintuple harmonic excitation brushless synchronous generator structure main generator and AC exciter two machine coaxial configurations, but its electric property is better than the electric property of the no-brush synchronous generator of the first-harmonic excitation mode and the two machine coaxial configurations third harmonic excitation mode, has reached the purpose of invention.
Claims (1)
1. quintuple harmonic excitation brushless synchronous generator, it is characterized by generator by main generator and AC exciter two machines coaxial composition, the DC power supply that the three-phase quintuple harmonics winding in the main generator unit stator iron core forms through rectifier rectification is taken from the DC excitation source of AC exciter magnetic pole of the stator winding; Main generator unit stator 60 grooves, number of poles 4 utmost points, the number of phases 3 phases, main generator rotor is made overall salient type, between stator and rotor even air gap is arranged, and pole embrace is 0.71～0.73; The main generator main winding is the concentric type two layer winding that does not wait circle, the coil groups of each concentric type is made up of 5 coils, coil span is respectively 14,12,10,8,6 from big to small, and the number of turn of each coil according to pitch from big to small its turn ratio be assigned as 3: 3: 2: 1: 1, the pitch of three-phase quintuple harmonics winding was 3, and number of poles is 5 times of main winding number of poles, 3 symmetrical structures, 3 phase single layer winding, no first-harmonic content in the quintuple harmonics winding, thereby quintuple harmonics winding and main winding quadrature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101154398A CN101562382B (en) | 2009-05-27 | 2009-05-27 | Quintuple harmonic excitation brushless synchronous generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101154398A CN101562382B (en) | 2009-05-27 | 2009-05-27 | Quintuple harmonic excitation brushless synchronous generator |
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| CN101562382A CN101562382A (en) | 2009-10-21 |
| CN101562382B true CN101562382B (en) | 2011-01-05 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102427291B (en) * | 2011-11-25 | 2015-04-22 | 浙江幸福机电科技有限公司 | Brushless generator in automatic voltage regulation state |
| CN103887908B (en) * | 2014-04-22 | 2016-08-31 | 哈尔滨工业大学 | A kind of brushless harmonic exitation synchronous motor |
| CN104506004B (en) * | 2014-12-23 | 2017-05-10 | 泰豪科技股份有限公司 | Seventh-harmonic excitation brushless synchronous generator |
| CN112421837B (en) * | 2020-11-10 | 2022-07-26 | 哈尔滨电气动力装备有限公司 | Stator winding structure of AC excitation generator on large brushless motor |
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