SU547922A1 - Three-phase pole-switched winding for 10-8-4 poles - Google Patents

Description

(54) THREE PHASE REPLACEMENT COUPLING 10-8-4

POLE

The invention relates to pole-switching windings and can be used to create multi-speed electric motors.

A pole-wound winding is known for 10-8-4 poles containing 24 coil groups with successive alternation of two groups with the number of coils determined by the closest integer from the ratio 2 / - | 8 and two groups with the number of coils determined by the closest integer from Ratios 2/56, where Z is the number of slots on the stator 1.

In the known winding, the phase is formed by the series connection of the coil. the groups whose numbers are determined from the expression (8i - 7) - 3t in the following sequence; 8i - 7; 8i - 4; 8i-b2; 8i + 5; 8i-i-8; 8i-i-ll; 8 ii-14, with the groups connected oppositely, with the exception of the two middle groups, which are connected according to, and the outputs are taken from the beginning, end and joining points (Si - 4) - and the group with (8i - 1) - and, (81 + 2) - and with (81 + -1-5) - yi (Si +8) - yc (81 + 11), and where: is the number of the phase t О, 1,2,3,4,5,6 , 7.

The indicated winding is closest to the proposed one in terms of technical drying.

A disadvantage of the known winding is the presence of a large number of conclusions, equal to 15.

The purpose of the invention is to reduce the number of windings.

This is ensured by the fact that the coil arrays entering the phase are interconnected alternately counter and in accordance with the following sequence; 8 i - 7: 8 i - 4; 8 i -I- 5; 8 i + 8; 8 i + 14; 8 i + 11; 8 i + 2; 8 i - 1, with the conclusions taken from the connection points (8i - 7), and groups with (81 - 1), and (8i - 4), with (81 + 5), and (81 + 8) with (8i + 14) and (81 + 11) -yes (81-n2).

Figure 1 shows the unfolded winding circuit for an electric machine, the number of slots on the stator is 36; in fig. 2 shows a coil connection.

The winding contains 24 coil coils with alternating number of coils in each:

2-2-1-1-2-2 ... The winding has 12 terminals Ai-A4 BI-B4, C | -C4. The phase contains 8 groups, the numbers of which are determined from the expression (8 1 - 7) -t-3t. Between themselves, the groups in phase are alternately interconnected and according to (see Fig. 2). Winding leads

taken from the junction points (8i - 7) and gr5T1Py from (81-1), (8i - 4) -th group from (8i + 5) -th, (81 + 8) th from (8 i + 14) -y (8 i + 11) -eis (8 i + 2) -th.

Applying the three-phase voltage to the AZ, Bj, Ca, AZ, BZ, Cz outputs and connecting them according to the star and triangle scheme, get eight poles.

When three-phase voltage is applied to the terminals A, BI, Ci, A4, 64, € 4, connected in a star or triangle circuit, ten poles are obtained.

Finally, by applying a three-phase voltage to the combined outputs (AzAz), (6263), (C2C3), (AiA4), (84), (CiC4) and connecting the phases, for example, according to the double-star scheme, four poles are obtained.

Claims (1)

1. Vanurin V.I. Harmonic analysis of windings of multi-speed motors, controlled by modulation method floor. Sat scientific papers MM-lCn, vol. 9, out. 3, part 1. M., 1972. FIG. 1 0000 3 B2 AI, c