SU1385189A1 - Three-phase superimposed stator winding - Google Patents

Abstract

The invention relates to electrical engineering and can be applied in combined electric machines with two differently polarized magnetic fields, for example in single-machine frequency and number of phase converters. The purpose of the invention is to improve the winding parameters for the PJ polarity by increasing the magnitude of the magnetomotive force. The winding with the numbers of pole pairs Pi / P7 10/3 is made of thirty spatially mixed coil groups and connected into two parallel three-phase stars, the beginnings of which form three-phase clips C1, C2, Sz for polarity p, and the conclusions from their zero points are two additional clamps for polarity pj. In the stars of the phases, the arresting groups are connected in series with each other and the numbers of the coil groups of phases C2 and Sz alternate relative to the groups of phase C with an interval of ten for the phase C2 and twenty for the phase of the SOC of groups. The groove pitch of the grooves is threefold pole division for polarity. The coil groups of phase C1 are numbered 1,4,13, 22,25 in the first star and 16,19,28,7, 10 in the second star. In each phase the ends of the coil groups are connected together Nos. 1 and 16, phases C1, 11 and 26, phases C2, 21 and 6, phases C3 3 3 Il. S (l

Description

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The invention relates to windings of combined electric machines with two opposite-pole magnetic fields and can be used, for example, in single-machine frequency and number of phase and core converters.

The purpose of the invention is to improve the use of the winding for polarity p. by increasing the winding coefficient fidientao

Fir.1 shows the layout of the proposed winding | on the MDS winding curve for polarity p 3; The diagram shows the EMF of the winding for polarity p 10.

The proposed winding (fig) is made three-phase for polarity p 10 in 60 slots of thirty spatially mixed; coils (with numbers from 1 to 30) and connected into two parallel three-phase stars, the beginnings of which form three-phase clamps C1, C2, C3 dL P 10J poles and the pins from their zero points form two additional clamps for poles (pins 01-02) “In the phase stars, the coils are connected in series-according to and for the C1 phase they have the numbers 1,4,13,22, 25 in the first star and 16 , 19,28,7,10 in the second star o For other phases, the numbers of the coils alternate relative phase C1 with an interval of ten coils for the C2 phase (coils 11.14,23,2.5 in the first star and 26,29,8,17,20 in the second star) and in twenty coils for the C3 phase ( coils 21,24,3512,15 in the first star and 6,9,18,27,30, in the second star) “In each phase the ends of coils 1 and 16 of phase C1, 11 and 26 of phase C2.21 and 6 are joined together C 3 "Coil pitch in grooves is equal to threefold pole division for polarity p, Toe" At p 3-60 / 20 9 °.

The top row of arrows on .fig shows the direction of the currents when powering the winding through the clips C1, C2, NW with three-phase current (p 10), and the winding coefficient for p, 10 equals, d 1.0 "The bottom row of arrows in Fig shows the direction of the currents when the winding is powered through the clamps 01-02 by direct current (p7 W), which is used for the integral MDS curve (Fig. 2). The diagram is shown in fig.

The EMF of the winding for the polarity is p, 10, where the EMF vectors correspond to the numbers of the coils о From figOZ it follows that the field with the polarity p 10 does not induce an emf at the terminals 01-02.

 When the winding is fed through the clamps 01-02 by the constant (rectified) part of the coils, this current does not flow around, as a result of which the shape of the MDS curve for polarity P2 is improved. 3 (FIG. 2) Compared with the known winding, the MDS curve for polarity p 3 has a larger amplitude value in the proposed winding, and the percentage of higher harmonics is at the same level.

The proposed winding can be used on the stator of combined electric machines and devices with two polarized magnetic fields.

Claims (1)

Invention Formula Three-phase combined stator winding with the numbers of pole pairs p / p 10/3, made of thirty spatially displaced coil groups and connected into two parallel three-phase stars, the beginnings of which form three-phase clamps C1, C2, Sz for polarity p, and the outputs from their zero points form two additional clamps for the PJ pole polarity, in the stars of the phases the coil groups are connected in series and in accordance with the numbers K and I. The C2 and C3 phase trunnion groups alternate relative to the C1 phase groups at intervals of ten for the C2 phase and twenty times for the C3 phase, and the groove spacing of the coils is three times the pole division for polarity p, characterized in that windings for polarity .p; j by increasing the winding ratio, the coil groups of phase C1 are numbered 1,4,13,22,25 in the first star and 16,19, 28,7,10 in the second star, and the ends of the coil groups with numbers 1 and 16 in the C1 phase, 1I and 26 in the C2 phase, 21 and 6 in the NW phase. Fig.Z