SU1089707A1 - Winding of rotor of compound electric machine - Google Patents

Abstract

ROTATING THE ROTOR OF A COMBINED ELECTRIC MAMSHY with numbers of pole pairs RP / PJ, filled with three phases for polarity Rl of 6p2 distributed coil groups with Pg parallel branches in each phase and with group numbers in phases (l + 3k),

Description

110

The invention relates to the windings of combined electric machines and can be applied to the rotor in single-machine frequency and phase converters, in two-speed asynchronous motors, etc.

Known are the combined windings of electric machines of alternating current, made in the form of parallel branches of one pole polarity, each of which consists of spatially shifted coils and has the findings of middle points, is the beginning of the phases of the other half-axis p. The angle between the axes of the coils of the same branch is () radians, and the number of turns B of the coils is proportional to the angle of their shift relative to the axis of the branch i,

The disadvantages of these windings are the complexity of design and manufacture, the large losses from the balancing currents in the branches x.

Closest to the proposed by the technical essence and the achieved result is the combined winding of the rotor of single-machine frequency converters with the numbers of pairs of poles p „/ p 5-3 - an integer made of 6p2 distributed coil groups with p parallel branches in each phase. In each branch, two groups are included in series-counters, displaced by rad for an odd number or by () and / p; rad for PJ / PI is an even number. The beginnings of the branches form three-phase clamps for polarity p of the generator and are connected to slip rings, and the ends of the branches are connected to a common point and the contours of the branches form a short-circuited winding with polarity p for the motor 2j.

The disadvantages of this winding are a large number of inter-joint connections in phases, the length of which (when) is approximately equal to half the length of the rotor circumference, which complicates the design and manufacture, increases copper consumption,. The purpose of the invention is to simplify the design and manufacture, reducing copper consumption compounds, as well as improved parameters.

This goal is achieved by the fact that for winding the rotor of the combined electric raspberry with the numbers of pairs

2

p2 / Pf5 poles made three-phase for polarity p „from 6p2 distributed coil groups with p„ parallel branches in each phase and with group numbers in phases (1 + k), (H + HK), (5 + 3k) , the clamps of the phases are formed by the beginning of the groups (I + 6k) and (2 + 6k), (3 + 6k) and (4 + 6k), (5 + 6k) and (6 + 6k), respectively, and in each phase the ends of all the groups where Pg / H, S3 is an integer, k 0,1,2 ... (2p2-1).

FIG. 1 shows the scheme of the proposed winding with 3/1; in fig. 2 - the star EMF of the winding and the EMF diagram for the polarity p 1; in fig. 3 - star and EMF diagram for polarity Rl 3.

The proposed winding (Fig. 1) is made with polarity Rl / p 3/1 of 6p2 18 distributed coils (with numbers from 1 to 18) in 18 slots with coil steps along slots Y 4. The winding has three phases for polarity pg 3 with numbers coils 1 + k 1; four; 7; ten; 13; 16 in phase РД 3 + 3k 3; 6; 9; 2; 5; 18 in phase p 5 + 3k 5; eight; li; 14; 17; 2 in phase p where k 0,, 2 ... (2p2-1 5).

The clamping phases are formed by the beginning of the coils l + 6k 1; 7; 13 and 2 + 6k 2; eight; 14 for phase p, 3 + 6k 3; 9; 15 and 4 + 6k 4; ten; 16 for phase P2, 5 + 6k 5; P; 17 and 5 + 6k 5; eleven; 17 and 6 + 6k 6; 12; 18 for phase Ra. The ends of all the coils in each phase are connected together (the ends of the coils l + 3k in the first phase, 3 + 3k in the second phase, 5 + 3k in the third phase). The arrows in FIG. Figure 1 shows the direction of the currents when powering the winding through the p, p and p terminals with three-phase current.

For polarity, p 1 (Fig. 2) is connected in phase (for example, in the first) to form two three-phase short-circuited systems and in the entire winding - a nine-phase system. For the polarity of P2 3 (Fig. 3), the phases of P P2. and p is connected in triangle and each phase has pg 3 branches. Connecting together the ends of the coils in phase is connecting each other equipotential points for polarity Pgt. This circumstance improves the winding parameters from the point of view of reducing the effect on the winding uneven and the air gap, which improves the noise and vibration characteristics. Pa figs. 2 and 3 EMF vectors are assigned numbers of coils. 08 7074 But compared to the known one, the proposed winding has simpler connections between the coils in phases, while the consumption of copper for inter-wire cuts is reduced by 40%.

18

/ 7

13

7,

eight

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X 9

ten

sixteen

Claims (1)

WINDING OF THE ROTOR OF A COMBINED ELECTRIC MACHINE with the numbers of pole pairs pg / p ₍ performed three-phase for the pole p ₂ of 6pg distributed coil groups with Pg parallel branches in each phase and with group numbers in phases (1 + Зк), (З + Зк), (5 + Зк), characterized in that, in order to simplify the design and manufacture, to reduce copper consumption and improve parameters, phase clamps are formed by the beginnings of the groups (1 + 6k) and (2 + 6k), (3 + bk) and ( 4 + 6k), (5 + 6k) and (6 + 6k), and in each phase the ends of all groups are connected together, where Pj / P <£ 3 is an integer § number; k = 0,1,2 ... ( 2pg-l) .K FIG. 1st e