SU1372484A1 - Single-phase/three-phase combination electric machine winding - Google Patents

Abstract

This invention relates to windings of electrical machines of alternating current. The purpose of the invention is to expand the field of application of the winding by obtaining the numbers of pairs of poles p, with three-phase clamps for pole pj. The winding is made of uniformly displaced coils and connected in parallel three branches, the beginnings of which form single-phase clamps for polarity p, and the leads from the middle points of the branches form additional clamps for polarity p, and the groove spacing along the grooves is equal to pole division for polarity p ,. The winding contains twenty-four coils with numbers 1, 7, 13, 19, -22, -16, -10, -4 in the first branch. For the other two branches, the coil numbers alternate with respect to the first branch at intervals of two (for the second branch) and four (for the third branch) coils. Additional clamps are made from the mid points of all three branches. The minus sign in front of the coil number means its counter-inclusion in the branches. To obtain single-phase clamps for polarity p, additional clamps are made from the midpoints of the first and second branches. 3 il. " WITH/)

Description

13724842

The invention relates to windings of FIG.: For p, 12 that this field is visible

electric machines of alternating current with two polarized fields in a common magnetic circuit.

The purpose of the invention is to expand the field of application by obtaining p, / with three-phase clamps for polarity p.

Figure 1 shows the scheme of the winding; 2 and 3 are diagrams for emf for p, 12 and respectively.

The winding (figure 1) is made single-phase for p, 12, single-layer in 48 slots of 24 coils (with numbers from 1 to 24) with a pitch. It is connected in three parallel branches with the numbers of coils in the first branch 1,7,13,19, -22, -16, -10, -4, and for the other two branches induces an emf at terminals A, B and C, in fig. 3 for p. it is evident that this field does not induce an emf at terminals 01 and 02. Winding factors for p, 12, g 0.707, for K ,,, 0.

In comparison with the known, the proposed winding has an expanded scope and improved parameters for polarity Pd. It can be used in single-machine frequency and phae frequency converters, in controlled ferromagnetic reactors, etc.

ten

15

Claims (1)

Invention Formula Single-phase three-phase co-electric winding with polarity Weigh the numbers of the coils alternate relative jg P, / Pr made of evenly sweeping first branch with intervals of two (for the second branch) and four (for the third branch) of coils, where the minus sign in front of the number of the coil means its opposite inclusion in the branches. The beginnings and the ends of the branches form the clamps 01 and 02 dl, and the leads from the middle points of the branches form the additional clamps A, B and C dl. The upper row of arrows in FIG. 1 shows the directions of a single-phase current during power supply of the winding through clamps 01 and 02 (p, 12), and the lower row shows a three-phase current of feeding the winding through clamps A, B and C (p, 8 ). When using a winding for p 8 single phase with 25 thirty 35 clips A and B of the coil of the third branch are removed from the circuit for this polarity, which improves the shape of the MDS curve and reduces (by 1/3) copper losses for p. 8. In FIG. 2 and 3 EMF vectors are assigned numbers of coils. Of and connected in three parallel branches, the beginnings and ends of which form single-phase clamps for polarity p, and the leads from the middle points of the branches form additional clamps for polarity p, and the groove spacing along the grooves is equal to the pole division for polarity p, o lt and so that, in order to expand the field of application by obtaining p, with three-phase clamps for polarity p, the winding contains twenty-four coils with numbers 1.7, 13,19, -22, -16, -10, -4 in the first branch, and for the other two branches, the coil numbers alternate at intervals in two and in four coils, and these additional clips are made from the mid points of all three branches, where a minus sign in front of the coil number means that it is switched on in the branches. Ke leads EMF at terminals A, B and C, in FIG. 3 for p. it is evident that this field does not induce an emf at terminals 01 and 02. Winding factors for p, 12, g 0.707, for K ,,, 0. In comparison with the known, the proposed winding has an expanded scope and improved parameters for polarity Pd. It can be used in single-machine frequency and phae frequency converters, in controlled ferromagnetic reactors, etc. 15 Invention Formula Single-phase three-phase co-electric winding with polarity five 0 five and connected in three parallel branches, the beginnings and ends of which form single-phase clamps for polarity p, and the leads from the middle points of the branches form additional clamps for polarity p, and the groove spacing along the grooves is equal to the pole division for polarity p, o lt and so that, in order to expand the field of application by obtaining p, with three-phase clamps for polarity p, the winding contains twenty-four coils with numbers 1.7, 13,19, -22, -16, -10, -4 in the first branch, and for the other two branches, the coil numbers alternate at intervals in two and in four coils, and these additional clips are made from the mid points of all three branches, where a minus sign in front of the coil number means that it is switched on in the branches. 17 GZ f3 A -22 f6 -W fff J S 15 21 -12 -6 y 5 11/7 23 С-г -20 - / "-Q - 02 FIG. 2 -nineteen rJ -Z FIG. 3 -22 -16 W