SU11197A1 - Winding for additional poles of DC electric machines - Google Patents

Description

As is known, the magnetic scattering of the main poles usually increases due to the effect of the additional poles located between the main poles; in turn, the main poles also contribute to an increase in the magnetic scattering of additional poles.

The present invention relates to the winding of additional poles of electric machines of direct current, and has the purpose of reducing the magnetic scattering of the main and additional poles by winding the additional poles in such a way that the plane of its turns is inclined to the axis of these poles.

In FIG. Figure 1 shows schematically two main poles and an additional pole located between them with an indication of the path of the scattered fluxes; FIG. 2-pole with the proposed winding.

FIG. 1 denote: N-S are two main poles, L is an additional pole, F and F are scattering flows, F. is the flow of an additional pole that enters the measles, a-b and a-b compensating coils.

The Mapt stream created by the additional pole N, under the influence of the main poles, is divided into two parts: the stream F. entering the measles, and the stream of dispersion F closing through the main opposite pole S.

Flows scattered (Fig. 1)

can be reduced by placing between the main and additional poles S, N, N two coils a-b and a-b, included in the main circuit of the machine so that the field created by these coils F is approximately equal in magnitude and opposite in direction two fields and main and additional poles (Fig. 1). ,

But from figure 1 it can be seen that the wires of the coil magnetically neutralize the action of the wires A of the winding of the additional pole; similarly, they neutralize each other magnetically in relation to the L and B wires. Therefore, at points A-B near the additional pole (Figs. 1 and 2), the winding may be completely absent. As a result, we arrive at the construction of a winding to (Fig. 2), formed by a series of turns, whose plane is inclined to the axis of the additional Yole. Such a winding, due to the inclined position of the turns, creates two magneto-motive forces; one magneto-motive force with an axis directed along the vertical creates a magnetic flux Φ, the other magneto-motive force with an axis directed horizontally creates a flux Φ compensating the scattering fluxes.

The subject of the patent.

The winding for additional poles of electric machines of direct current, characterized in that, in order to reduce the magnetic scattering of the main and additional poles, the plane of the windings of the additional poles are inclined to the axis of these poles (Fig. 2).

FIG.