SU1267540A1 - Three-phase two-speed winding for a.c.machines - Google Patents

Abstract

The invention relates to electrical engineering and can be used in the design of multi-speed electric machines of alternating current. The purpose of the invention is the expansion of the field of application by obtaining the number of pairs of 1: 5 poles. The winding contains twelve coil groups (kg) uniformly distributed along the bore of the machine, in which six CGs are interconnected in a triangle with two CGs on opposite side in each side of the triangle and with leads from the vergain triangle for a smaller number of pole pairs, and six other CGs - connected in three branches, each of which is connected to the middle of one of the sides of the triangle, and from the beginning of each branch a conclusion is drawn for a larger number of pole pairs. In the triangle are connected in series CG with numbers 1-7-9-3-5-11, and each branch of the winding is formed by series-counter connected CG with numbers: 10-4 for the first branch; 6-12 for the second branch; 2-8 for the third branch, the first branch being connected to the junction point between them KG 1 and 7, the second - 9 and 3, the third - 5 and 11, and at the junction points

Description

Neither xieTHbie and odd KG are included among themselves according to. When the number of pairs of poles is p 5, the voltage is

to conclusions A, d, B | a, C o, and conclusions

A. 2 Il.

B, C remain open.

t

This invention relates to multi-speed pole-selectable windings of AC electric machines.

The aim of the invention is to expand the field of application of the winding to the ratio of the numbers of pole pairs 1: 5, simplify the winding and increase the use of winding copper.

FIG. Figure 1 shows a diagram of the connection of elements of a three-phase two-speed winding with the ratio of the numbers of pole pairs 1: 5; in fig. 2 shows a three-phase two-speed winding circuit with pole numbers 2 and 10 for the number of slots Z 36.

A three-phase two-speed winding with a ratio of the numbers of pole pairs 1: 5 contains twelve identical coil groups with numbers 1-12, uniformly distributed over the machine bore (Fig. 2). The odd coil groups are connected to each other in a triangle with the numbers of series-connected coil groups in a triangle 1-7-9-3-5-11, with the coil groups 7, 3 and 11 included opposite to the other coil groups in the triangle, and from the vertices triangles in which the coil groups 7-9, 3-5J 11-1 are interconnected, the conclusions are made respectively Aj, Bg, C. Even-numbered coil groups are connected in three branches, in each of which two coil groups are numbered with numbers: 10 -4 for the first branch; 6-12 for the second branch; 2-8 for the third branch, the coil group 10 of the first branch is connected to the coil groups of the triangle with numbers 1-7, the coil group 6 of the second branch is connected to the coil groups 9-3 and the coil group 2 of the third branch is connected to the coil groups 5-11, and at the junction points, even and odd

Reel groups are included with each other according to. From the beginning of the first branch of G coil group 4, the conclusion was made A, d., From the beginning of the second branch / coil group 12) —shopper C, and from the beginning of the third branch Gatuvgechna group 8) - view view (Fig. 1).

The winding has six terminals to switch 1: a spruce frequency frequency and is applicable for slot numbers that are multiples of 12. When the number of pairs of poles is p 5, voltage is applied to terminals A (A, B, d ,, C, Q windings, and A, B. Cj remain open. For engine operation at higher speeds with p 1, three-phase power is supplied to interconnected leads

A 2 -B

B ,, - and C, - S. With

ten

In this phase, the windings are connected T-shaped with three parallel branches. The use of copper winding with both numbers of pole pairs is 100%. The winding is performed with a groove, a groove along grooves that are different or close to the diametral pitch at 2p 10, as well as with a step equal to an odd multiplicity relative to the diametrical pitch.

The proposed winding may be used in multi-speed AC motors.

Claims (1)

Invention Formula A three-phase two-speed winding of alternating-current machines for the number of pairs of poles PJ and p, consisting of twelve odinaks, 1x coil groups, uniformly distributed over the machine bore, in which six coil groups are interconnected. In a triangle with two oppositely included coil groups in each side of the triangle and with conclusions from the vertices of the triangle for a smaller number of pole pairs, and the six remaining coil: groups are connected into three branches, each of which is connected to the middle of one of the sides of the triangle, and from the beginning of each branch a conclusion is drawn for a larger number of pole pairs, characterized in that, in order to expand the field of application of the winding to relate the numbers of pole pairs 1t5, simplify the winding and increase the use of winding copper, in a triangle coil groups are sequentially connected with numbers 1-7-9-3-5-11, and each branch of the winding is formed of series-opposite coil groups with numbers 10-4 for the first branch, 6-12 for the secondbranches and 2-8 for the third branch, with the first branch connected to the connection point between the coil groups 1 and 7, in parallel - to the connection point of the coil groups 9 and 3 and the third - to the connection point of the coil groups 5 and 11, and at the points connections of even and odd coil groups are interconnected according to. phage. 2