RU2231193C1 - Three-phase double-layer 8-pole winding - Google Patents

Abstract

FIELD: electrical engineering, electric machine manufacture, manufacture of 8-pole electric machines.

SUBSTANCE: three-phase double-layer eight-pole winding has coil groups which numbers in phases are assigned in compliance with expression (4m-3)+3t, where m=1, 2, 3 is phase number. In accordance with invention t=0, 1, 2 and 3, number of coils in coil groups is equal to number zl/12, where zl is number of slots in stator. Start of 1-st coil group is connected to start of 7-th coil group, finish of 1-st coil group is connected to start of 4-th coil group, finish of 4-th coil group is connected to finish of 10-th coil group, finish of 7-th coil group is connected to start of 10-th coil group, start of 5-th coil group is connected to start of 11-th coil group, finish of 5-th coil group is connected to start of 8-th coil group, finish of 8-th coil group is connected to finish of 2-nd coil group, finish of 11-h coil group is connected to start of 2-nd coil group, start of 9-th coil group is connected to start of 3-d coil group, finish of 9-th coil group is connected to start of 12-th coil group, finish of 12-t coil group is connected to finish of 6-th coil group, finish of 3-d coil group is connected to start of 6-th coil group. Starts of phases are starts of 1-st, 5-th and 9-th coil groups, finishes of phases re finishes of 10-th, 2-d and 6-th coil groups. Voltage is supplied to terminals 13, 14, 15 with star or delta phase connection.

EFFECT: expanded application field of eight-pole winding in electric motors with any number of slots.

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Description

The invention relates to electrical engineering, in particular to the field of electrical engineering, and can be used to create eight-pole asynchronous electric motors.

Known three-phase single-layer concentric winding at 8 poles / 1 /, containing in phase 4 coil groups, the numbers of which are determined according to the expression (4m-3) + 3t, where m = 1, 2, 3 - phase number, t = 0, 1, 2 and 3, the coil groups in phases are connected in accordance with the conclusions from the beginning of the coil groups 1, 2, 3 and the ends of the coil groups 10, 11, 12.

A disadvantage of the known winding is the presence of different coil groups, between the ends of the phases a shift of 120 electrical degrees is not provided.

Known three-phase two-layer winding at 8 poles / 2 /, containing 24 coil groups, the numbers of coil groups in phases are determined according to the expression (4m-3) + 3t, where m = 1, 2, 3 - phase number, t = 0, 1, 2 ... 7.

A disadvantage of the known winding is the presence of a large number of different coil groups and can be used only in electric motors with a number of grooves 54.

Closest to the proposed invention is a three-phase two-layer winding at 8 poles / 3 / containing coil groups, the numbers of which in phases are determined according to the expression (4m-3) + 3t, where m = 1, 2, 3 is the phase number, t = 0 , 1, 2 ... 7, while the beginning of 1 coil group is connected to the beginning 13 of the coil group, end 1 with the end 4, beginning 4 with the beginning 7, end 7 with the end 10, beginning 10 with the beginning 22, end 13 with the end 16, beginning 16 with beginning 19, end 19 with end 22, beginning 3 with beginning 15, end 3 with end 6, beginning 6 with beginning 9, end 9 with end 12, beginning 12 with beginning 24, end 15 with end 18, beginning 18 with beginning 21, end 21 with end 24, beginning 5 with beginning 17, end 5 with end 8, beginning 8 with beginning 11, end 11 with end 14, beginning 14 with beginning 2, end 17 with end 20, beginning 20 with beginning 23, end 23 with end 2. The beginning of the phases are taken from the beginnings of 1, 3, 5 coil groups, the ends of the phases are from the beginnings of 22, 24, 2 coil groups.

A disadvantage of the known winding is the limited scope.

The present invention solves the problem of expanding the scope of the eight-pole winding, increasing its operational reliability.

This is achieved by halving the number of coil groups and by changing the scheme of intraphase connections.

A three-phase two-layer winding at 8 poles containing coil groups, the numbers of which in phases are determined according to the expression (4m-3) + 3t, where m = 1, 2, 3 is the phase number, t = 0, 1, 2 and 3, the number of coils in the coil groups is equal to the number z1 / 12, where z1 is the number of grooves on the stator, with the beginning of 1 coil group connected to the beginning of 7 coil groups, end 1 with beginning 4, end 4 with end 10, end 7 with beginning 10, beginning 5 beginning 11, end 5 with beginning 8, end 8 with end 2, end 11 with beginning 2, beginning 9 with beginning 3, end 9 with beginning 12, end 12 with end 6, end 3 with beginning 6, beginning of phases taken the beginning of 1, 5, 9 coil groups, the ends of the phases ends 10, 2, 6 of the coil groups.

Figure 1 shows a diagram of a deployed two-layer winding at 8 poles, figure 2, 3 shows the directions of the currents on the sides of the coil groups and the magnetomotive force of the winding, the directions of the currents and magnetomotive force correspond to the amplitude of the current in phase A. The sides of the coils of phase A are indicated by a square, phase B - a triangle, phase C - a circle.

The winding contains 12 coil groups with numbers from 1 to 12. The number of coils in the coil groups is determined by the number z1 / 12, where z1 is the number of grooves on the stator, while the beginning of 1 coil group is connected to the beginning of 7 coil groups, the end 1 to the beginning 4, end 4 with end 10, end 7 with beginning 10, beginning 5 with beginning 11, end 5 with beginning 8, end 8 with end 2, end 11 with beginning 2, beginning 9 with beginning 3, end 9 with beginning 12, end 12 with the end of 6, the end of 3 with the beginning of 6. The beginning of the phases is taken to be the beginning of 1, 5, 9 coil groups, the ends of the phases are the ends of 10, 6, 2 coil groups.

The voltage is applied to the terminals 13, 14, 15 (Fig. 1). Phase connection diagram with a star ‘Y or a triangle Δ.

The value of the winding coefficient K _about = 0.83.

Thanks to the proposed scheme for connecting coil groups, the field of use of the eight-pole winding is expanding and it can be used in electric motors with any number of grooves.

Sources of information

1. V.N. Vanurin Windings of induction motors. - M .: Kolos, 1978, 98 pp., Fig. 14.

2. V.N. Vanurin Windings of induction motors. - M .: Kolos, 1978, 98 pp., Fig. thirteen.

3. Winding data of induction motors. / Ed. P.N. Tsibulevsky - M.-L .: Kolos, 1966, 368 p., Fig. 3-107.

Claims (1)

A three-phase two-layer winding of 8 poles containing coil groups, the numbers of which in phases are determined according to the expression (4m-3) + 3t, where m = 1, 2, 3 is the phase number, characterized in that t = 0, 1, 2 and 3, the number of coils in the coil groups is equal to the number z1 / 12, where z1 is the number of grooves on the stator, with the beginning of 1 coil group connected to the beginning of 7 coil groups, end 1 with start 4, end 4 with end 10, end 7 with the beginning 10, beginning 5 with beginning 11, end 5 with beginning 8, end 8 with end 2, end 11 with beginning 2, beginning 9 with beginning 3, end 9 with beginning 12, end 12 with end 6, end 3 6 start, I start phase starts taken 1, 5, 9 of the coil groups of phases the end 10, 2, 6 coil groups.

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