SU782046A1 - Three-phase two-speed pole-switchable winding - Google Patents

Abstract

The motor is for operation in the 6-8 pole mode giving a choice of two speeds. The stator has 36 slots and the coils are arranged in 16 groups. There are 6 terminals which, when connected in delta gives low speed operation, and high speed when in star. The arrangement of the coil groups is the same in each half of each phase, but the groupings of each pase is different. It follows a set pattern of one, two or three coils per group. The sequence of connection permits a higher utilisation factor per unit mass than on other pole changing machines, and also more economical building.

Description

; 54) THREE-PHASE TWO-SPEED INDUSTRY-SWITCHED

WINDING

one

This invention relates to pole-selectable windings of AC motors.

There are three-phase two-layer pole-switched obmbtki on the number of 5 slots, a short 36 with the ratio of the numbers of poles 2p: 2pj 8: 6, switchable on cxqMe d / HH or V / H with six output ends l.

However, the presence of a large number of core groups complicates the technology of windings as compared with single-speed two-layer windings. ;

Closest to the proposed technical entity is a three-phase two-speed pole-switched winding, two-layered with a number of coils that are multiples of 36, with a ratio of 20 pole numbers 2p: 2p2 8 s 6, containing coils unevenly distributed in groups, forming the phases of the winding divided into half-phases 2.25

Its disadvantage is the presence of a large number of coil groups.

The purpose of the invention is to simplify the manufacturing technology of the winding. thirty

This goal is achieved by the fact that the coils are divided into 16 groups with the number of coils in each group, determined in accordance with the numerical series of LC, 1K, 1K, LC, LC, 2K, 2K, LC, LC, 1K, 1K, LC, ZK, 2K, 2K, ZK, with coil groups with serial numbers 1 and 4 included in one semi-phase, and coil groups with numbers 9 and 12 - in the second semi-phase, first phase, coil groups with numbers 6, 8 and 11 are included in the first half-phase of the second phase, the second half-phase of which is formed by -cluster groups with numbers 14, 16 and 3, the first and second

. The 15 semi-phases of the third phase are formed by coil groups with sequence numbers 10, 13, 15 and 2, 5, 7, respectively, and the coil groups with sequence numbers 3, 4, 6, 11, 12 13 and 14 are included in opposite directions with respect to the remaining coil ones. groups.

The drawing shows a diagram of the proposed 2-speed winding with a pole ratio 2p: 6, made in 36 slots.

For operation on the number of poles 2 to 8, power is supplied to the terminals 8G1, 8G2, 8G3, and for operation on 2p 6 - to 6S1, 6S2, 6G3, when shorting

clips 8С1, 8С2, 8СЗ. The winding is symmetrical. .

The magnitude of the winding factors at a winding pitch of 5 is 0.819 and Kvv3 0.85.

The winding is characterized by a reduced, compared with the existing pole-switched windings with a given pole ratio, the number of coil groups equal to 16.

Claims (2)

Invention Formula Three-phase two-speed pole-selectable winding, two-layer with the number of coils, a multiple of 36, with the ratio of the numbers of poles 2p: 2p2 8: b. Containing coils unevenly distributed in groups forming the phases of the winding, divided into half-shells: which, in order to simplify the technology; manufacturing the coils, the coils are divided into 16 groups with the number of coils in X1 each group defined by in accordance with the numerical series of the LC, .1К, 1К, ЗК, ЗК, 2К, 2К, ЗК, ЗК, 1К, 1К, ЗК, ЗК, 2К, 2К, ЗК, and the coil groups with serial numbers I and 4 are included in one semi-phase, and the coil groups with numbers 9 and 12 are in the second semi-phase of the first phase, coil groups with numbers 6, 8 and 11 are included in the first semi-phase of the second phase, the second semi-phase of which is formed by coil groups with numbers 14, 16 and 3 , the first and second semi-phases of the third phase are formed by coil groups with the sequence numbers 10, 13, 15 and 2, 5, 7, respectively, and the coil groups with the order 5 numbers 3, 4, 6, 11,12, 13 and 14 are included in opposite to the other coil groups. Sources of information taken into consideration 0 H- Sequenz, Die Wicklungen Iethergischeg, Maschinen, Wien, Springer-Verlog 1954, c. 102-105, 2. USSR author's certificate № 399967, cl. H 02 K 3/28, 1970.  1112 aif 5l6l7l81S202m2} i2 2S27lS 9: S3nn}} l3Si6 R 2 6L2