CN85103786A

CN85103786A - Individual layer three phase windings and the coil-inserting method of A connection motor

Info

Publication number: CN85103786A
Application number: CN 85103786
Authority: CN
Inventors: 张城生; 陈雪华
Original assignee: Huazhong College Of Technology
Current assignee: Huazhong College Of Technology
Priority date: 1985-05-11
Filing date: 1985-05-11
Publication date: 1986-11-05

Abstract

The invention belongs to single layer winding and wire insertion technology method that stator winding is A connection three-phase alternating-current motor and generator.The present invention proposes to replace with individual layer three phase windings the three phase sine winding of 30 ° of facies tracts of double-deck three-phase A connection of alternating current machine in the past, adopt pitch y=odd number, each coil has the individual layer of same pitch and the shape winding construction that changes, and solves the sinusoidal winding electric machine wire insertion technology of double-deck A connection complexity, the difficulty that rolls off the production line, the cost in man-hour is many, manufacturing cost is high problem.Simultaneously, keep the sinusoidal winding electric machine of double-deck A connection the fundamental wave winding coefficient height, the magnetic field harmonic content is low, loss is little, efficient is high, the advantage of saving electric energy.

Description

Individual layer three phase windings and the coil-inserting method of A connection motor

The invention belongs to threephase motor or generator The improvement of the stator winding of connection and wire insertion technology method thereof.

Of the prior art

The three phase sine winding electric machine of connection, 30 ° of facies tracts all had more detailed explanation in the documents such as phase in 1984 the 2nd in " Huazhong Institute of Technology journal " the 5th phase of nineteen eighty-three, the 6th phase and " middle and small motor ".Said motor has certain advantage in the above-mentioned document, be used for the design of high efficiency motor such as yx series by China, but every pair of utmost point groove number is that the above motor of 18 grooves generally all adopts two layer winding, bilayer three phase windings of 60 ° of more traditional facies tracts will increase more than 20% when the coiling of this winding, rule, wiring chief engineer, technology is complicated, manufacturing cost is higher, and this becomes a unsolved for a long time technical barrier.

Task of the present invention is: reduce

When the coiling of the three phase sine winding of connection, rule, wiring chief engineer, the high efficient of the motor of this winding of maintenance employing and good performance.

Main points of the present invention are,

Three phase windings of connection have single layer structure, and the stator coil number of every motor is that its groove is counted half of Q, and each coil has identical pitch y=odd number, and identical shape is arranged, and can be chain, as shown in Figure 2.Symmetry three phase windings of stator winding intermediate cam shape connection part have the phase difference of 30 ° of space electrical degrees with connecting between star symmetry three phase windings partly, the turn ratio of its each coil is W △/Wr=

\sqrt{3}

, sectional area of wire ratio be S △/Sr=1/

\sqrt{3}

。Elder generation is in odd bin 135 during rule ... alternately embed a limit of triangle coil and star coil among the n=y+2 successively, then in even bin n-y, embed the another side of n slot coil; In the n+2 groove, embed a coil side again, in the n+2-y groove, embed the another side of this coil Later on successively at follow-up odd bin n+4, n+6 ..., even bin n+4-y, n+6-y ... in embed each coil, until all coils all in the embedded groove.After two limits of a coil are intactly in the embedded groove, then should give this overhang shaping (or being shaped in advance), allow its outer end bend towards outer garden unshakable in one's determination, the angle that end winding is bent should be too not big, in order to avoid damage the insulation of coil and exceed outer unshakable in one's determination, heave but the coil side that should make follow-up embedding can successfully embed and the end is unlikely, all should repeat the shaping step of above-mentioned end winding behind complete coil of every embedding.

Because

The individual layer three phase winding overall coil numbers of connection are than of the prior art

The coil number of the double-deck three-phase winding motor of connection has reduced half, preserve the fundamental wave winding coefficient height simultaneously, still had the advantage of lower the harmonics of magnetic force content, descend when making the chief engineer of this class motor windings manufacturing again, make the copper consumption of motor that decline also be arranged slightly, reached saving of labor, material-saving, reduce cost and improved the effect of motor product quality.This being used for

The wire insertion technology method of the single layer winding of connection not only can be applicable in high efficiency motors such as the yx of China series, has also possessed the condition of applying in basic serial motor product.If after adopting motor windings wire insertion technology method of the present invention with the motor of every 100KW, the decline of manufacturing cost and this motor be owing to the raising of the efficient electricity charge of saving that are in operation are 50 yuan, and then the motor of annual 1000 ten thousand KW adopts the economic benefit behind the present invention can reach 5,000,000 yuan.

Table 1 has provided in the double-deck three-phase winding motor and prior art with 60 traditional facies tracts The motor of double-deck three phase windings of connection and of the present invention

When the coiling of connection individual layer three-phase winding motor, rule, wiring chief engineer and the contrast situation of main technical detail.Minimum when therefrom as seen utilizing the chief engineer of coil-inserting method of the present invention cost.

Accompanying drawing in this article respectively is expressed as:

Fig. 1: groove is counted Q=48 groove, P=2 to the motor slot vector star graph of the utmost point (y250M-4.55KM) and the Pareto diagram of coil;

Fig. 2: be motor windings expanded view shown in Figure 2.

Be that 24 motor is the wire insertion technology method of example explanation with every pair of utmost point groove number below:

Coil span y=11 groove (2 utmost point motors are got the y=9 groove), the winding of triangle and star connection respectively has 6 coils, and each coil can be the identical chain of shape; In odd bin 135791113, alternately embed earlier the short-term limit of delta windings and star winding during rule successively, as the short coil limit in the 1st groove embedding triangle coil, the 3rd groove embeds the short coil limit in the star coil, so analogize, then in the 2nd groove of even number, embed the long loop limit of the coil of the 13rd groove, then to being embedded into the 13rd, after the end winding shaping in 2 grooves, in the 15th groove, embed the short-term limit of another coil again, embed the long loop limit of this coil at the 4th groove, to being embedded into the 15th, end winding shaping in 4 grooves ... later in follow-up odd bin, embed the weak point of each coil in the even bin, the long loop limit, at last successively with the 1st, 3,5,7,9, the Chang Quan limit of the long loop of coil embeds (Q-10) in 11 grooves, (Q-8), (Q-4), (Q-2), in the Q groove, weak point at each coil, the long loop limit intactly in the embedded groove after, to its overhang shaping, make the long loop limit of each follow-up embedding embed that rearward end is unlikely to be heaved.

A among Fig. 1 _△, b _△, c _△And a _Y, b _Y, c _YRepresent respectively a that should embed in this groove number mutually or b mutually or the delta windings of c phase or the coil side of star winding, "+" on a, b, c number or "-" number represent respectively the coil in this groove should be in institute's symbolic animal of the birth year forward link or oppositely connect.

_{A △},

_{B △}, _{C △}Be the phase potential vector figure of delta windings correspondence, _AY,

_BY, _CY, be the phase potential vector figure of star winding correspondence, vector

_△With

_YBetween 30 ° of electrical degrees of mutual deviation.

D among Fig. 2 ₁, D ₂, D ₃Three lead-out wires representing this motor.

Claims

1, a kind of wire insertion technology method that is used for the single layer winding of three phase alternating current motor people connection is a motor windings more than 18 grooves to every pair of utmost point groove number, it is characterized in that each coil has identical pitch and shape, said pitch y=odd number; Elder generation is in odd bin 1,3,5 during rule ... alternately embed a limit of delta windings and star winding coil among the n=y+2 successively, then in even bin n-y, embed the another side of n slot coil; In the n+2 groove, embed a coil side again, in the n+2-y groove, embed the another side of this coil, later on successively at follow-up odd bin n+4, n+6 ..., even bin n+4-y, n+6-y ... in embed each coil, until all coils all in the embedded groove.

2, according to the described wire insertion technology method of claim 1, it is characterized in that, after two limits of a coil are intactly in the embedded groove, then tackle this overhang shaping, allow its outer end bend towards outer garden unshakable in one's determination, the coil side that makes follow-up embedding can successfully embed and the end is unlikely heaves, and the angle of being bent should be too big and not exceed outer unshakable in one's determination; All should repeat the shaping step of above-mentioned end winding behind complete coil of every embedding.

3, every pair of utmost point groove number according to claim 1,2 described wire insertion technology method manufacturings is 24 grooves

Individual layer three phase windings of connection motor is characterized in that the pitch y=11 groove of coil or 9 grooves, the winding of triangle and star connection respectively have 6 coils.