SU1262634A1 - Combined three-phase - one-phase stator winding - Google Patents

Abstract

The invention relates to electrical engineering and can be used in electric machines of alternating current of the combined type, for example, in single-machine frequency and number of phase converters, etc. The purpose of the invention is to enhance the functionality of the winding by obtaining two levels of voltage. The winding is made with the numbers of pole pairs 7/9, with three-phase clips C1-C4, C2-C5, Sz-Sb for polarity p and with additional clips for polarity p. It contains eighteen distributed coil groups with two concentric coils in each with steps in grooves 9 and 7 and with numbers of turns in a ratio of 1.28: 1.0. The phases are connected in two parallel branches and in the branches of the C1-C4 phase, the coils of the coil groups with numbers 1, -5, 6, -10, 14, -15 are connected in series, and the numbers of the coil groups of the other two phases alternate with respect to the C1-C4 phase six groups for the C2-C4 phase and twelve groups for the C3-C6 phase, where the minus sign in front of the number of the coil group means that its coils in the branch are turned on. In the C1-C4 phase in the SL, the outer branch is impacted by the outer coils of groups 1,14, -15 and the inner coils of the groups -5,6j-10, the inner coils of groups 1,4, -15 and: the outer coils of the groups -5, 6, -10. These additional clamps are made in each phase from the middle points: the branches. 3 il.

Description

The invention relates to electrical engineering, in particular, to windings of electric machines of alternating current of the combined type, and can be applied, for example, in single-unit machines; frequency and phase converters, etc. "

The purpose of the invention is to enhance the functionality of a winding by using a winding of two voltage levels.

FIG. 1 shows a schematic of the proposed winding; ya fig. 2 -; the star and the EMF phase diagram for polarity p. ; in fig. 3 shows the phase emf for polarity p 9.

The winding (fig. 1) is made double-layered in 36 slots from 18 cutout groups (with numbers 1-18) with two concentric coils each with steps along slots y, 9 and 7. For polarity p, -7, the winding is three-phase with clamps began and ends of phases C1-C4, C2-C5, SZ-Sat. The phases are connected in two parallel branches and in the C1-C4 phase are connected in series the coils of the coil groups with numbers 1, 5.6, -10, 14, -15, and the numbers of the coil groups of the other phases alternate relative to the C1-C4 phase with an interval of six groups phases C2-C5 and twelve groups for phase C3-C6, where the minus sign in front of the number of the coil group means that its coils in the branches are switched on. Additional clamps are made in each phase from the middle branches: clamps 01-04, 02-05 ,, 03-6i6, for the sake of convenience Pj-9, cut off three single-phase circuits. The numbers of turns of the outer and inner coils correlate as: 1.0 and are determined from the condition of equality of the emf of the phase branches for polarity p 7. The upper row of arrows in FIG. 1 draws current directions during power supply; windings through clips C1-C4, C2-C5, i SZ-Sb (phases can be connected both with a star and a triangle) with a three-phase current (p 7, and the bottom row of arrows - with power supply) through the clamps 01-04 02-05, 03-06, with single-phase currents (p 9). The winding winding ratio (Fig. 1) is: -0.763 for p, 7, and KOB, 0.707, p 9.

In FIGS. 2 and 3, the EMF of the outer coils is assigned the numbers of the coil groups, and the vectors of the EMF of the internal coils are assigned the numbers of the coils

groups with a stroke.

 FIG. 2 according to the EMF star for pole position Pf 7, an EMF diagram of the C1 – C4 phase is constructed, from which it can be seen that the field with this pole sign does not induce an EMF at the additional terminals 01-04,

ifilled from the middle points of the branches.

, From the EMF phase diagram for polarity p 9 (Fig. 3) it can be seen that the field with this polarity does not induce an emf at terminals C1 – C4.

In comparison with the known winding, the proposed one has enhanced functional capabilities, since it allows the phase connections of stars (oh and triangle), and for polarity p 9 has three single phase circuits.

Claims (1)

Invention Formula Combined three-phase-single-phase stator winding with the numbers of pole pairs PI / PJ 7/9, containing eighteen distributed coil groups with two concentric coils each with groove steps in 9 and 7 and with the number of turns in the ratio 1.28: 1.0, the phases of which are connected in two parallel branches and in the branches of the first phase are connected in series the coils of coil groups with numbers 1, -5.6, -10, 14, 15, and the numbers of coil groups of other phases alternate with respect to the first phase with an interval of six groups for the second phase and twelve groups for the third phase, characterized in that, in order to expand  functionality by using a winding on two voltage levels, in the first phase, the first branch includes external coils of groups 1.14, -15 and internal coils of groups -5.6, -10, the second branch includes internal coils of groups 1.14, -15 and outer coils of -5.6, -10 groups, with the specified additional clamps being made in each phase from medium 5 points of branches, where the minus sign is in front, .. the number of the coil group means the counter inclusion of its coils in the branches. 15 (0 5 fo 3 f6  ff f4 y 6 FIG. 2