SU1141519A1 - Combined winding for electric machine - Google Patents

Abstract

ELECTRIC COMPLETE COUPLING with numbers of pole pairs 2/1, containing twelve distributed coil groups and connected into two parallel three-phase stars, the beginnings of which form three-phase clamps for polarity p, and their zero points are two additional clamps for polarity p, which In order to improve the parameters by reducing the losses in copper in the first phase, groups with numbers 1 and -10 are connected in succession to the branch of the first star, 7 and -4 to the second star in the second phase - rpynnti 3 and -12 to the branch of the first star, 9 and - 6 - the second star, in the third phase - groups -2 and 5 in the branch of the first star, -8 and 11 - the second star, the middle points of the branches in each phase are connected together, and the coils have a step equal to pole division for polarity p, where The minus sign in front of the group number means that it is countered. U1; o

Description

The invention relates to coils of combined electric machines and can be applied, for example, in motors with a rolling rotor.

Electromechanical combined windings with a number of pole pairs, p., / Pj 1/6 are known, containing twelve distributed coil groups connected in phases into two parallel branches, the beginnings of which form three-phase clamps for polarity p, and their ends are connected into two additional terminals for poles

The lack of data windings - limited scope,

Closest to the invention to the technical essence and the achieved result is the combined winding of electric machines with the numbers of pairs of poles p, / p 2/1, containing twelve distributed coil groups connected into two parallel three-phase stars, the beginnings of which form three-phase clamps for polarity p, and their zero points are two additional clamps for polarity Pj. In the branch of each star, two groups are connected in series, shifted by Ji / 4 rad 2.

A disadvantage of the known winding is a large circuit loss for the polarity Pj.

The purpose of the invention is to reduce the winding parameters for PJ polarity by reducing copper losses.

This goal is achieved by the fact that the combined electric winding n, with the numbers of pole pairs p / p 2/1, containing twelve distributed coil groups and connected into two parallel three-phase stars, the beginnings of which form three-phase clamps for polarity p, and their zero points are two Additional terminals for polarity p,, in the first phase are connected in series with the numbers 1 and -10 to the branch of the first star, 7 and -4 - to the second star, in the second phase - groups 3 and -12 to the branch of the first star, 9 and -6 the second star, in the third phase - group -2 5 in the first branch of the star, and 11 -8 - second star, and the average

the points of the branches in each phase are connected together, and the coils have a pitch close to pole division for polarity p, where the minus sign in front of the group number means that it is turned on.

FIG. 1 shows the scheme of the proposed winding; in fig. 2 is the integral curve of its magnetizing force (NS) for the polarity PJ 1; FIG. 3 is an emf diagram for polarity p 2.

The winding (fig „1) contains 12 distributed coils and is made in 24 slots with a coil pitch along the slots Ur, 7; the coil numbers are from 1 to 12. The coils are connected into two parallel three-phase stars, the beginnings of which form three-phase clamps C1, C2, NW for polarity p 2, and their zero points 01 and 02 are additional clamps for polarity p 1. In phase C1, they are connected successively coils with numbers 1 and -10 in the branch of the first star, 7 and -4 - the second star, in phase C2 - coils 3 and -12 in the branch of the first star, 9 and -6 - the second star, in the NW phase - coils - 2 and 5 in. the branch of the first star, -8 and the second star. The middle points of the branches in each phase are connected together; the minus sign in front of the coil number means that it is turned on.

When the coil is fed through the clamps 01 and 02 with a constant current, half of the coil coils are removed from this circuit, which halves copper losses for the polarity pj and improves the HC curve for this polarity (Fig 2). When the winding is supplied with three-phase current, a field c is formed p 2 polarity (see direction of the upper row of arrows in Fig. 1)

Thus, the proposed washing in comparison with the prototype has better parameters for the polarity p, since for this polarity the losses in copper are halved, and the parameters for the polarity Pm are also improved due to equalizing connections in the branches x. The winding ratio of the winding (FIG. 1) -dl of polarity Pt 2 is equal to K os j 0.966. - “- hch- ji JS, 5 7 8 9 Ю 11 2 Xf - /

Phage.1

Claims (1)

ELECTROMECHANICAL COMBINED WINDING with the number of pairs of poles p „/ p ₂ = 2/1, containing twelve distributed coil groups and connected in two parallel three-phase stars, the beginnings of which form three-phase clamps for the pole ₅ and their zero points are two additional clamps for the pole p ₂ , characterized in that, in order to improve parameters by reducing losses in copper _? in the first phase, groups 1 and -10 are connected in series to the branch of the first star, 7 and -4 are the second stars. in the second phase are groups 3 and -12 to the branch of the first star, 9 and -6 are the second stars, in the third phase - groups -2 and 5 into the branch of the first star, -8 and 11 - of the second star, and the midpoints of the branches in each phase are connected together, and the coils have a step equal to the pole division for the pole p ^, where the minus sign in front of the group number means its counter inclusion. I