SU1345290A1 - Three-phase single-layer pole-switchable winding - Google Patents

Abstract

The invention can be applied to the manufacture of two-speed asynchronous motors. The purpose of the invention is to increase reliability by eliminating a break in the power supply when switching. The design feature of the proposed winding is that it is performed in 54 slots of the stator, consists of 18 coil groups, has 9 terminals, a switching circuit / UUU. A winding produces a ratio of pole pair numbers of 16/4. 2 Il.

Description

 13

And;) oG) retention is related to pole-type and switchable windings of electric machines of alternating current and can be used in the electrical industry in the manufacture and installation of stator windings of two-speed asynchronous motors.

The purpose of the invention is to increase reliability by eliminating a break in the power supply when switching.

FIG. Figure 1 shows the scheme of the proposed single-layer winding with the ratio of the pole numbers 16/4, performed in 54 slots of the stator with numbers from 1 to 54, containing eighteen coil groups with numbers from 55 to 72, with nine outputs; in fig. 2 - external switching circuit of a winding with mating phases Y / YYY (coil groups consisting of two coils are indicated by large rectangles; groups containing one coil by smaller triangles; the beginning of coil groups by dots),

The zero point is formed by the beginnings of coil groups with sequence numbers 57, 63, 69. The winding has six additional terminals A2, A3, B2, VZ, C2, SZ, formed by the connection points of coil groups 64 and 65, 55 and 56, 70 and 71, 61 and 62, 58 and 59, 67 and 68, respectively. For operation on a larger number of pole pairs, the winding is connected to a star with the terminals A1, B1, C1, which are the power terminals on both numbers of the pole pairs, with free additional terminals. To work on fewer; the poles closure in pairs between each other conclusions A1 and A3, B1 and VZ, C1 and SZ, A2 and B2, B2 and C2, form the scheme of a triple star.

The winding allows switching from one number of poles to another without breaking the supply circuit, which increases the reliability of the circuit and makes it possible to use it in elevator engines.

The winding can be laid in a mechanized way on modern storobotomochnoe equipment by the method of separate laying, as its design meets all the requirements of mechanized laying: the winding contains only concentric coil groups; both sides of the coil packs are laid simultaneously, i.e. excluded

step lifting operation; The coil groups can be distributed without crossing in the frontal parts.

The winding ratios of the proposed winding are: K, 0.827, KW, 0.854, 0.8405. The relative value of the differential EDS is 0.043, which is quite acceptable.

The proposed winding has enhanced functionality, nine outputs and can be recommended for use in the electrical industry in the manufacture and laying of the stator windings of two-speed asynchronous motors of alternating current.

Claims (1)

Invention Formula 0 0 five A three-phase single-layer pole-selectable winding of a two-speed motor with a ratio of pole numbers of 16/4, containing coils unevenly distributed over coil groups, combined in nine parts, with combined ends of the third, sixth, and ninth parts, with conclusions from the beginnings of the first , the fourth and seventh parts and from the pairwise united beginnings of the second and third parts, the fifth and sixth parts, the eighth and ninth parts, from the pairwise combined ends of the first and second parts, the fourth and fifth parts, the seventh and eighth parts, In contrast, in order to increase reliability by eliminating a break in the power supply when switching, it is performed in 54 slots of the stator numbered from 1 to 54, it contains eighteen coil groups with sequence numbers from 55 to 72, of which three groups with sequence numbers 55, 61, 67 and the beginnings of external coils in grooves numbered 5, 5 23, 41, respectively, are formed by two concentric coils with a pitch of 11.9, six groups with serial numbers 56, 59, 62, 65, 68, 71 and the beginnings of external coils in grooves with numbers 8, 17, 26, 35, 44, 53, respectively, are formed by a coil with a step of 5, six groups with order numbers 57, 60, 63, 66, 69, 72 and the beginnings of external coils in grooves with no.55 measures 9, 18, 27, 36, 45, 54 respectively, three groups with sequence numbers 58, 64, 70 and the beginnings of external coils in grooves with numbers 14, 32, 50, respectively, and the first part includes coil groups 60, -65, the second part includes The coil grupps are -55, -64, the third part includes the coil groups -56, 69, the fourth part includes the coil groups 66, -71, the fifth part includes the coil groups -61, -70, the sixth part includes the coil groups -62, 57, the seventh part includes reel groups 72, -59, the eighth part includes reel groups -67, -58, the ninth part includes reel groups -68, 63, where the minus sign in front of the reel group number means counter inclusion. 67 68 69 Bf NW J FIG. 2 Compiled by A. Ketsaris Editor A. Lezhnin Tehred A. Kravchuk Proofreader M. Maksimnnnets Order 4928/52 Circulation 659Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 figure 1