SU1372489A1 - Three-phase combination electric machine winding - Google Patents

Abstract

The invention relates to windings of electric machines of alternating current with two polarized magnetic fields in a common magnetic core. The purpose of the invention is to expand the scope by obtaining the number of pairs of poles P, / Pr 2/3, as well as improving the parameters for polarity p. The winding is made of uniformly spaced coils connected in two parallel three-phase stars, the beginnings of which form three-phase clamps for polarity p, and the leads from their zero points are two additional clamps for polarity p, and the groove spacing along the grooves is threefold pole division for polarity p. The winding contains thirty-six coils. In the first phase, the coils with numbers 1, 7, 13, 16, 28, 4 in the first star and 19, 25, 31, 34, 10, 22 in the second star are connected in series. For the other two phases, the coil numbers alternate with respect to the first phase at intervals of two and four coils. In each phase, the ends of the coils with numbers 13 and 31, 15 and 33, 17 and 35 are connected together with an equalizer. 2 Il. i (L

Description

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The invention relates to windings of electric machines of alternating current with two opposite-pole fields in a common magnetic core. The purpose of the invention is to expand the field of application of the winding by obtaining P, / P 12/3, as well as improving the parameters for polarity p.

FIG. 1 shows a winding circuit; in fig. 2 - EMF diagram for

R, 12.

The winding (fig. 1) is made three-phase for p, 12, single-layer in 72 grooves and 36 coils (with numbers from 1 to 36) with a step along the grooves of pack 9. It is connected into two parallel three-phase stars, the beginnings of which form clamps C1, C2 and C3 for p 12, and the outputs from their zero points are terminals 01 and 02 for p 3. For the first phase, the coils are connected in series according to and are 1.7, 13, 16, 26, and 4 in the first star and 19, 25,31,34,10 and 22 in the second star For the other two phases of similarly made coil numbers alternate relative to the first phase with intervals of two (for phase C2) and in yre (for the NW) reel. The upper row of arrows in FIG. Figure 1 shows the directions of the three-phase current when powering the winding through clips C1, C2 and C3 (p, 12), and the lower pg shows the direction of direct current when powering the winding through clips 01 and 02 (p „3). Due to the presence of equalizing compounds in the phases (in each phase the ends of the coils 13 are connected together

and 31, 15 and 33, 17 and 35) half of the coil windings removed from the circuit for

p 3, which improves the shape of the MDS curve for this pole and reduces (by half) copper losses. FIG. The coil numbers are assigned to the EMF vectors, from which it can be seen that the field with p 12 does not induce an emf at terminals 01 and 02. The winding coefficient for p 12

Coel 1.0 As compared with the known one, the proposed winding has an expanded scope and improved parameters for p 3. It can be applied on the stator of combined electric cards with two opposite-pole magnetic fields.

Claims (1)

Invention Formula Three-phase aligned electric winding with pole, made of uniformly displaced coils, connected in two parallel Three-phase stars, the beginnings of which form three-phase clamps for polarity p, and the leads from their zero points form additional clamps for polarity p, and the step of the coils along the slots is threefold pole division for pole polarity p, characterized in that, in order to expand the field of application by obtaining P, / P, 12/3, as well as improving the parameters for polarity p, the winding contains thirty six ka ears, in the first phase are connected in series according to the coils with numbers 1, 7, 13, 16, 28, 4 in the first star and 19, 25, 31, 34, 10, 22 in the second star, and for the other two phases the numbers of the coils alternate relative to the first phase with intervals of two and four coils, and in each phase the ends of coils 13 and 31, 15 and 33, 17 and 35 are connected together with an equalizer.