CN201430482Y - Dual-Y thirty-degree motion and six-phase rectification winding of fractional slot - Google Patents

Abstract

A dual-Y thirty-degree motion and six-phase rectification winding of a fractional slot is characterized in that a forty-eight-groove twenty-eight-pole six-phase dual-Y 30-degree winding of a fractional slot is designed to comprise coils with two types of span lengths, one type of the coil span length is eight, the other coil span length is two, the turn number of the coils whose span length is eight is two times of that of the coils whose span length is two, a coil whose span length is eight and two coils whose span length is two form a unit, and every four units form a one-phase winding. Thewinding has the technical effects that firstly, a six-phase full-bridge rectification can greatly reduce fifth and seventh harmonics, secondly, the winding can not mutually induct and affect a forty-eight-groove two-pole 50 Hz-industrial frequency three-phase alternating current winding and a medium-frequency third harmonics single-phase winding, thirdly, eleventh, thirteenth, seventeenth, nineteenth harmonics of the dual-Y 30-degree motion six-phase winding are few, and the fifth and the seventh harmonics after six-phase rectification are further reduced a lot, thereby the direct current voltage ripple coefficient is small and is less than 1%, and the quality of the direct current is good.

Description

The two Y of a kind of fractional-slot move 6 commutating phase windings of 30 degree

Technical field

The utility model relates to a kind of multifrequency generator AC Windings of stator core altogether, relates in particular to the 6 commutating phase windings that the two Y of a kind of fractional-slot move 30 degree.

Background technology

In being total to stator core, arrange many covers winding of multiple frequency, for example in having the stator core of 48 grooves, 3000 rev/mins of rated speeds arrange power frequency (50HZ) 2 utmost point three-phase alternating current windings, the extremely two Y of intermediate frequency (700HZ) 28 move 30 degree, 6 commutating phase windings, the single-phase winding of intermediate frequency triple-frequency harmonics (84 utmost point 2100HZ).Require 1, do not have mutual inductance when working at the same time between this three covers winding and disturb, require 2, two Y move 30 degree, 6 commutating phase windings and connect rectification after the direct voltage ripple coefficient little, voltage regulation is little, all less than 1%, working stability.Because it is proper fraction that 48 grooves, 28 utmost points constitute the every extremely every phase groove number of 3 phase times, promptly $q=\frac{\mathrm{<figure-callout\; id="2"\; label="z"\; filenames="Y2009201855810008H1.png"\; state="\{\{state\}\}">z</figure-callout>}}{2\mathrm{pm}}=\frac{48}{28x3}=\frac{4}{7},$ Therefore constitute two Y move 30 when spending also by $q=\frac{4}{7}$ Design, but in this fractional-slot, be designed to two Y and move 30 degree, 6 commutating phase windings, to satisfy above-mentioned two specification requirements, do not see relevant document introduction, must seek the novel concrete structure that the two Y of this proper faction groove move 6 commutating phase windings of 30 degree.

Summary of the invention

The 6 commutating phase windings that the purpose of this utility model has been to provide the two Y of a kind of fractional-slot to move 30 degree, the two Y of intermediate frequency 700HZ fractional-slot that seek to have 28 utmost points in 48 groove stator cores move the novel concrete structure of 6 commutating phase windings of 30 degree; But no mutual inductance is disturbed between 2 utmost point power frequency (50HZ) three-phase alternating current windings of arranging in this winding and 48 grooves and the single-phase winding of intermediate frequency triple-frequency harmonics (84 utmost point 2100HZ), and 6 phase intermediate frequency (2100HZ) the rectification windings that two Y move 30 degree are little by required filter capacitor behind the rectifier rectification; The direct voltage ripple coefficient is less than 1%.

The utility model is achieved like this, it is characterized in that the two mutually Y of 48 grooves, 28 utmost points 6 move the coil composition that 30 degree fractional slot winding are designed to two kinds of spans, a kind of coil spread is 8, another kind of coil spread is 2, span is that 8 coil turn is that span is 2 times of 2 coil turn, and span is that 8 coil and 2 spans are 2 coil, and these three coils form 1, per 4 joint groups become 1 phase winding, total A ₁, B ₁, C ₁A ₂, B ₂, C ₂6 phases, the winding mark is respectively A ₁X ₁, B ₁Y ₁, C ₁Z ₁And A ₂X ₂, B ₂Y ₂, C ₂Z ₂, A wherein ₁X ₁, B ₁Y ₁, C ₁Z ₁120 ° of electrical degrees of mutual deviation, A ₂X ₂, B ₂Y ₂, C ₂Z ₂Also 120 ° of electrical degrees of mutual deviation, and A ₂X ₂Hysteresis A ₁ X ₁30 °, C ₂Z ₂Hysteresis C ₁Z ₁30 °, X ₁, Y ₁, Z ₁, X ₂, Y ₂, Z ₂Be connected into together A ₁, B ₁, C ₁A ₂, B ₂, C ₂Be output, output terminals A ₁, B ₁, C ₁A ₂, B ₂, C ₂Directly join with six commutating phase full-bridges.

Technique effect of the present utility model is: 1, form the 6 commutating phase windings that the two Y of fractional-slot move 30 degree, be connected into six phase full-bridge rectification and can slacken 5,7 subharmonic greatly; 2, the two Y of these 48 groove, 28 utmost point intermediate frequency 700HZ fractional-slots move 30 degree 6 phase windings and 48 grooves, 2 utmost point power frequency 50HZ three-phase alternating current windings and the single-phase winding of intermediate frequency triple-frequency harmonics (84 utmost point 2100HZ) and do not have the mutual inductance interference; 3, to move 30 degree 6 phase windings 11,13,17,19 subharmonic content few for this pair Y, reduces for 5,7 times much behind 6 commutating phases again, so the direct voltage ripple coefficient is very little after the rectification, less than 1%, direct current is best in quality.

Description of drawings

Fig. 1 is winding construction figure of the present utility model.

Fig. 2 is winding connection figure of the present utility model.

Embodiment

As shown in Figure 1, this fractional slot winding is designed to the coil of two kinds of spans and forms, a kind of coil spread is 8, a kind of coil spread is 2, span is that 8 coil turn is that span is 2 times of 2 coil turn, span is that 8 coil and 2 spans are that these three coils of coil of 2 form 1, and per 4 joint groups become 1 phase winding, and example is A ₁Phase winding is designated A ₁X ₁

Span is that 8 coil is 7-16; 20-28; 32-40; 44-4;

Span is that 2 coil is 9-11; 13-15; 21-23; 25-27; 33-35; 37-39; 45-47; 1-3;

Span is that 8 coil turn is that span is 2 times of 2 coil turn.Wherein 7-16,9-11,13-15 form 1, its rest may be inferred by analogy 20-28,21-23,25-27,32-40,33-35,37-39; 44-4,45-47,1-3; Form 3 respectively, above-mentioned 4 by the diagram connection, and output token is A ₁X ₁, A ₁X ₁Be A ₁Phase; Similar composition B ₁Y ₁Become B ₁Phase, C ₁Z ₁Become C ₁Phase, A ₁, B ₁, C ₁120 ° of three-phase mutual deviations, similar composition A ₂X ₂Become A ₂Phase, B ₂Y ₂Become B ₂Phase, C ₂Z ₂Become C ₂Phase, A ₂, B ₂, C ₂Three-phase is 120 ° of mutual deviations also, as the groove cloth postpone of accompanying drawing regulation, A ₂, B ₂, C ₂A lags behind respectively ₁, B ₁, C ₁30 °, with A ₁X ₁, B ₁Y ₁, C ₁Z ₁, A ₂X ₂, B ₂Y ₂, C ₂Z ₂In X ₁, Y ₁, Z ₁, X ₂, Y ₂, Z ₂Be coupled to and be labeled as 0 ， Liu together to go out output be A ₁, B ₁, C ₁, A ₂, B ₂, C ₂Connection is an accompanying drawing 2.

Output terminals A ₁, B ₁, C ₁, A ₂, B ₂, C ₂Insert 6 phase full-wave rectifiers, can weaken 5,7 subharmonic greatly.

By above-mentioned layout, do not contain the induction of 2 pole fields in every phase winding, do not contain the induction of intermediate frequency triple-frequency harmonics, with A yet ₁Be that illustration is bright as follows mutually;

In 48 grooves, 2 utmost point motors, be α=360 °/48=7.5 ° every the electrical degree of 1 groove, 48 grooves 28 extremely in A ₁Mutually, span is that the groove that 4 coils of 8 belong to the A facies tract number is 8,28,32,4, the groove that belongs to the Z facies tract number is 16,20,40,44, the equal turn numbers of these 4 coils, analyze earlier in the A facies tract groove numbers 8 and groove numbers 32 and differ 24 grooves, 28 and 4 differ 24 grooves, in 48 grooves, 2 utmost point motors, it is just in time opposite with No. 32 groove electric vector phase places then to differ 7.5 ° * 24=180 ° No. 8 grooves of event, equal and opposite in direction, itself and be zero, No. 28 grooves and No. 4 grooves are also like this.In like manner analogize 16 and No. 40 grooves of Z facies tract, 20 and No. 44 grooves electric vector equal and opposite in direction in 2 utmost point motors, phase place is opposite, itself and be zero, A during 48 grooves 28 are extremely also promptly has been described ₁4 spans mutually are not respond to 2 electrode potentials in 8 the coil, and 2 utmost points and 28 extremely do not disturb mutually; In like manner, analyze 28 utmost point A ₁Span mutually is 8 coils of 2, and the groove at their a facies tract places number is 11,15,21,25,35,39,45,1; 11 and 35,15 and 39,21 and 45,25 and 1 24 grooves of mutual deviation all as can be known, the groove at their X facies tract place number is 9,13,23,27,33,37,47,3; 9 and 33,13 and 37,23 and 47,27 and 3 also 24 grooves of mutual deviation all as can be known also promptly all differ from 7.5 ° * 24=180 ° in 48 grooves, 2 utmost point motors, these coil turns equate that all so its electric vector equal and opposite in direction, phase place is opposite, itself and all be zero, also i.e. 48 grooves, 28 utmost point A ₁Do not have 48 grooves, 2 utmost point induced potentials mutually, do not disturb mutually.According to above-mentioned analytical method, A as can be known ₁, B ₁, C ₁, A ₂, B ₂, C ₂In all do not contain 2 utmost point induced current electromotive forces, so and do not have mutual inductance between 2 utmost point power frequencies, three phase windings yet, do not disturb mutually, first one of requires to reach the utility model purpose.

48 groove intermediate frequency triple-frequency harmonics are 28 * 3=84 utmost point, every the electrical degree of 1 groove are

Method is similar according to the above analysis, is example mutually with A1 also, belongs to 8,28,32,4 of A facies tract and wherein 8 and 4,28 and 32 all differs 4 grooves, so differ

Also promptly illustrate 84 extremely in 8 and 4 electric vector equal and opposite in directions, phase place is opposite, itself and be zero.28 and 32 is also like this.By that analogy under the Z facies tract, 16 and 20,40 and 44, under a facies tract 11 and 15,21 and 25,35 and 39,45 and 1; Under the X facies tract 9 and 13,23 and 27,33 and 37,47 and 3, all be to differ 4 grooves, also all differ

Illustrate promptly that also they all are the paired equal and opposite in directions of electric vector in extremely 84, phase place is opposite, itself and all be zero, all the other phase B ₁, C ₁, A ₂, B ₂, C ₂Also but similar analysis draws similar conclusion.The two Y that is to say 48 grooves, 28 these structures of the utmost point move in 30 degree, 6 phase windings and do not contain the intermediate frequency triple-frequency harmonics, also promptly do not disturb with the single-phase winding mutual inductance of intermediate frequency triple-frequency harmonics, reach two of the 1st requirement of utility model purpose.So the two Y of these 48 grooves, 28 utmost point fractional-slots move 30 degree, 6 phase windings and do not have mutual inductance to disturb with 2 utmost point three-phase alternating current windings of stator core and the single-phase winding of intermediate frequency triple-frequency harmonics 84 utmost points, reach one of utility model purpose.

To A ₁Phase winding is arranged, the electric vector spirogram of winding conductor in groove that can draw, and the winding coefficient computing formula that draws this winding easily is

Formula draws each harmonic content such as following table in view of the above:

From table, draw two Y and move 30 degree, 6 phase windings 5,7 subharmonic content are higher will to be moved 30 degree by two Y and weaken during 6 phase winding connection rectifications, 17,19 subharmonic content are little, but in order to weaken slot ripples, stator core is with oblique 0.90 slot pitch, 23 slot ripples are with weakened, and 17,19 subharmonic are also weakened, and 11,13 subharmonic content are very little, do not have 3 times and 3 multiple subharmonic, so it is also little through the very little required filter capacitor of direct voltage ripple coefficient of rectifier rectification output that this pair Y moves 30 degree, 6 phase windings, like this, just reached two of the purpose of this utility model, promptly the direct voltage ripple coefficient is little after the rectification, voltage regulation is little, all less than 1%, direct current is best in quality, the purpose of working stability.

Claims (1)

1, the two Y of a kind of fractional-slot move 6 commutating phase windings of 30 degree, it is characterized in that the two mutually Y of 48 grooves, 28 utmost points 6 move the coil composition that 30 degree fractional slot winding are designed to two kinds of spans, a kind of coil spread is 8, another kind of coil spread is 2, span is that 8 coil turn is that span is 2 times of 2 coil turn, and span is that 8 coil and 2 spans are 2 coil, and these three coils form 1, per 4 joint groups become 1 phase winding, total A ₁, B ₁, C ₁A ₂, B ₂, C ₂6 phases, the winding mark is respectively A ₁X ₁, B ₁Y ₁, C ₁Z ₁And A ₂X ₂, B ₂Y ₂, C ₂Z ₂, A wherein ₁X ₁, B ₁Y ₁, C ₁Z ₁120 ° of electrical degrees of mutual deviation, A ₂X ₂, B ₂Y ₂, C ₂Z ₂Also 120 ° of electrical degrees of mutual deviation, and A ₂X ₂Hysteresis A ₁X ₁30 °, C ₂Z ₂Hysteresis C ₁Z ₁30 °, X ₁, Y ₁, Z ₁, X ₂, Y ₂, Z ₂Be connected into together A ₁, B ₁, C ₁A ₂, B ₂, C ₂Be output, output terminals A ₁, B ₁, C ₁A ₂, B ₂, C ₂Directly join with six commutating phase full-bridges.

Images