RU2259000C1 - Pole-changing winding - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: proposed three-phase pole-changing winding has differentially connected coil groups. Each phase includes six cumulatively connected parts. First part incorporating coil groups numbered 8i - 7, 8i - 4, 8i - 1, and 81 + 2 is connected to second part of coil groups numbered 8i + 17, 8i + 20, 8i + 223, and 8i + 26. Second part is connected to third part of coil groups numbered 8i + 41, 8i + 44, 8i + 47, and 8i + 50. Third part is connected to fourth part of coil groups numbered 8i + 5, 8i + 8, 8i + 11, and 8i + 14. Fourth part is connected to fifth part of coil groups numbered 8i + 29, 8i + 32, 8i + 35, and 8i + 38. Fifth part is connected to sixth part of coil groups numbered 8i + 53, 8i + 56, 8i + 59, and 8i + 62. Terminal leads are brought out from starting leads of coil groups 8i - 7 and 8i + 50 and finishing leads of coil group 8i + 62 form neutral point (i = 1, 2, 3).

EFFECT: enlarged functional capabilities at increased number of stator slots.

1 cl, 2 dwg

Description

The invention relates to electrical engineering and can be used to create multi-speed asynchronous electric motors.

Known pole switch winding, consisting of two according to the included parts in each of the three phases, with the opposite inclusion of coil groups, the first part with the numbers of coil groups 8i-7, 8i-4, 8i-1, 8i + 2 connected to the second part with the numbers of the coil groups are 8i + 5, 8i + 8, 8i + 11, 8i + 14, the conclusions are taken from the beginnings of 8i-7 and 8i + 2 of the coil groups, the ends of 8i + 14 of the coil groups form the zero point, where i = 1, 2, 3 and from a number greater than 36, the number 36 is subtracted [1, 2, 3].

A disadvantage of the known winding is that it does not allow the switching of the poles in relation to 30/24.

The present invention solves the problem of expanding the functionality of the winding with an increased number of slots on the stator.

The solution to this problem is achieved by the fact that the pole-switched winding with on-off coil groups contains six according to the included parts in each phase, while the first part with the numbers of coil groups 8i-7, 8i-4, 8i-1, 8i + 2 is connected to the second part with numbers 8i + 17, 8i + 20, 8i + 23, 81 + 26, the second part is connected to the third part with numbers 8i + 41, 81 + 44, 8i + 47, 81 + 50, the third part is connected to the fourth part with numbers 8i + 5, 8i + 8, 8i + 11, 8i + 14, the fourth part is connected to the fifth part with numbers 8i + 29, 8i + 32, 8i + 35, 8i + 38, the fifth part is connected to the sixth part with numbers 8i + 53, 8 i + 56, 8i + 59, 8i + 62, the conclusions are taken from the beginnings of 8i-7, 8i + 50 coil groups, the ends of 8i + 62 coil groups are combined at the zero point, where i = 1,2,3

Figure 1 shows a diagram of the in-phase connections of the winding;

Figure 2 shows the form of the magnetomotive force of the winding.

According to figure 1, the pole-switching winding contains in each phase 6 according to the included parts, while the first part with the numbers of the coil groups 8i-7, 8i-4, 8i-1, 8i + 2 is connected to the second part with the numbers 8i + 17, 8i + 20, 8i + 23, 8i + 26, the second part is connected to the third part with numbers 8i + 41, 8i + 44, 8i + 47, 8i + 50, the third part is connected to the fourth part with numbers 8i +5, 8i + 8, 8i + 11, 8i + 14, the fourth part is connected to the fifth part with numbers 8i + 29, 8i + 32, 8i + 35, 8i + 38, the fifth part is connected to the sixth part with numbers 8i + 53, 8i + 56, 8i + 59, 8i + 62, conclusions are taken from the beginnings of 8i-7, 8i + 50 coil groups, the ends of 8i + 62 coil groups form a zero point (i = 1, 2, 3).

For example, the first phase winding (i = 1) includes 1, 4, 7, 10, 13, 16, 19, 22, 25, 28, 31, 34, 37, 40, 43, 46, 49, 52, 55, 58, 61, 64, 67 and 70 reel groups. To improve the shape of the magnetomotive force of the winding, the number of turns in the coils marked "b" is 1.2 times higher, and in the coils marked "m", 1, 2 below the average calculated.

According to figure 2, the magnetomotive force of the winding (the sides of the phase A coils are indicated by a square, phase B by a triangle and phase C by a circle) indicates clearly expressed 30 poles and 24 poles. The circuit provides a high degree of utilization of the size of the basic multi-pole asynchronous electric motor with fewer poles.

Sources of information

1. A.S. USSR No. 5447922, H 02 K 3/28, 1976.

2. A.S. USSR No. 756547, H 02 K 3/28, 1980.

3. A.S. USSR No. 997191, H 02 K 17/14, 1982.

Claims (1)

Three-phase pole-switched winding with the opposite inclusion of coil groups, with leads from the beginnings of 8i-7 coil groups, characterized in that each phase consists of six according to the included parts, with the first part with the numbers of coil groups 8i-7, 8i-4, 8i- 1, 8i + 2 is connected to the second part with numbers 8i + 17, 8i + 20, 8i + 23, 8i + 26, the second part is connected to the third part with numbers 8i + 41, 8i + 44, 8i + 47, 8i + 50 , the third part is connected to the fourth part with numbers 8i + 5, 8i + 8, 8i + 11, 8i + 14, the fourth part is connected to the fifth part with numbers 8i + 29, 8i + 32, 8i + 35, 8i + 38, the fifth part connected to w with the part numbers 8i + 53, 8i + 56, 8i + 59, 8i + 62, the conclusions are taken from the beginnings of 8i-7, 8i + 50 coil groups, the ends of 8i + 62 coil groups form the zero point (i = 1, 2, 3).

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