SU1145414A1 - Three-phase combined winding for electric machine - Google Patents

Abstract

ELECTRIC MACHINE THREE-PHASE COMPOUND SHOT with the numbers of pairs of poles Рг / р, filled from the same uniformly distributed and connected in phases sequentially coil groups with concentric coils, so that it expands the scope of use by P1 / RF 5 also increases the utilization rate of copper, the winding is made in thirty-six slots of twelve coil groups laid in two layers, the first are connected to the first and eighth groups, the second and the seventh are opposite, and The Omera groups of other phases alternate with respect to the groups of the first phase with an interval in the four parts of the group, each group containing two coils with steps along (L 4 and 2. Grooves

Description

4 O1

4 1 The invention relates to a winding of electric machines of alternating current and can be used, for example, in water-machine frequency and phase number converters. Three-phase windings of alternating current of electrical machines are known, made with a whole or fractional number of slots per pole and phase, one two- or one-two-layer, with equal-step or concentric coils Cl). The lack of known windings is the impossibility of using them as combined, working simultaneously with two numbers of pairs of poles,. I The closest to the proposed one is the combined winding of AC electric machines with the numbers of pole pairs 7/2, containing identical uniformly distributed in space and connected in series in phases coil groups r by concentric coils. The windings are out. One of the nine groups, the coils of each of which are located within the zone, is equal to 21 (/ 9 radians, and in the first phase, groups 3 and 8 are turned on opposite to group 1, and the groups of other phases are included in the same way with three groups respectively, with respect to groups of adjacent phases, and the number of turns of the inner coil of each group is half as much as in the remaining coils of group 23. The disadvantage of such a winding is a limited scope. The purpose of the invention is the expansion of the application area by obtaining PZ / Pi ® as well and copper. I This goal is achieved by the fact that a three-phase electromachine combined winding consisting of identical uniformly distributed and connected in phases successively coil groups with concentric coils is made in thirty six slots of twelve coil groups laid in two layers in the first the first and the eighth groups are connected to the phase, the second and the seventh groups are opposite, and the numbers gr and upp of the other phases alternate with respect to the groups of the first phase with an interval of 14 1 groups, each group containing two coils, with the steps along the grooves V „4 and 2. Fig. 1 shows the scheme of the proposed winding in Fig. 2 - the integral curve of its magnetizing force (NS); Figures 3 and 4 show the EMF stars of the winding groups for polarity p 5 and p2 7. The winding (Fig. 1) is double-layered in 36 slots of 12 distributed coil groups with numbers from 1 to 12 with concentric coils with steps along the grooves H " 4 and 2. I The winding has outputs of beginnings and ends of phases C1-C4, C2-C5, SZ-C6 and can be connected by a star or a triangle. In the first phase, the teams will consistently group with numbers 1 and 8 according to, 2 and 7 are opposite. The other two phases are connected similarly with the displacement of groups into four groups: in the second phase - groups 5 and 12 according to, 6 and 11 are opposite, in the third phase - groups 9 and 4 according to, 3 and 10 are opposite (EMF stars in Fig. 3 and 4 ). The arrows in figure 1 show the direction of the currents when the winding is supplied with three-phase current (for the point in time when the current in phase C1-G4 has an amplitude value), according to which in figure 2 the integral step curve HC is constructed, decomposed into two oppositely rotating HC with number of poles and G with the number of poles. Their winding coefficients are 846 and CFU 14 and the product of Kflg, characterizes the degree of use of copper winding, working as a combined. This product is much larger than for a three-phase winding, made 2p 10, polar in 36 slots in a known manner. - In FIG. 3 and 4 EMF vectors are assigned numbers of groups and initial groups of phases. Proved by numbers in circles. From FIG. 3 (for PT 5) and FIG. 4 (for), it can be seen that the NA of the indicated pole positions rotate counter to each other. Thus, the proposed winding, as compared with the prototype winding, has an extended field of application, since it allows

the number of pairs of poles is 5/7, and in comparison with the known three-phase windings, the use of copper is significantly higher than the product of the tanking coefficients of the NA of the indicated polarity.

11454144

The proposed winding can be used, for example, in single-machine frequency and phase converters, in contactless AC machines J with a combined pathogen, etc.

/ 234

2 2

eight

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Fig.d

Claims (1)

ELECTROMALMINE THREE-PHASE COMBINED WINDING with the numbers of pairs of poles Pr / Pt, made of the same coil groups with concentric coils uniformly distributed and connected in phases in series, characterized in that, in order to expand the scope by obtaining P ₂ / p, = 7 / 5, as well as increasing the utilization of copper, the winding was made in thirty-six grooves of twelve coil groups, stacked in two layers, in the first phase the first and eighth groups were connected, the second and seventh counter, and groups of other phases alternate relative to the groups of the first phase with an interval of four groups, each group containing two coils with groove steps in steps _n = 4 and 2. (60 1 145414