SU445966A1 - Electric machine - Google Patents

Description

one

The invention relates to electric machines, mainly asynchronous motors of low and medium power.

Asynchronous motors with a league core winding are known, the frontal connections of which are placed in arc slots made in the core and arranged in several concentric circles. The front portions of each phase are arranged in different parallel planes to avoid intersections.

The main disadvantages of these windings are the complexity of the core, especially in the area of the frontal connections, the increased axial length of the frontal parts.

The purpose of the invention is to simplify the design and reduce the dimensions of the electric machine.

To achieve this goal, a separating part is installed on the core of the machine, at the end of which there are arc sections of the winding frontal parts made in one plane.

In this case, the joints of the arc sections of the frontal parts with the corresponding rods are made in the holes of the dividing part, which have a different inclination to the axis of the core and connect the rod along the shortest path to the arc section located on one or another circle.

The connections of the arc sections of the frontal parts with the corresponding rods can also be made in the openings without tilting with uneven grooves of the extreme sheets.

core. In this case, due to the complexity of the core, an increase in the efficiency of the active parts is achieved, since the thickness of the separation part can be reduced. In addition, it is proposed to balance the phases in windings containing frontal connections on both sides of the core, for example, in multipoles, to make arc sections of frontal connections of one phase on a larger diameter on one side of the core and on a smaller one.

FIG. 1 shows the frontal part and cuts of the stator core along the slots of different phases; in fig. 5-7 - a dividing detail; in fig. 8 - lobova part of the section, option

with separation of frontal joints by gaps formed by a casting mold; in fig. 9 - frontal part in a section, a variant with an end washer and part of stator sheets with grooves of unequal height; in fig.

10 shows the separation part in the embodiment shown in FIG. 9.

The electric machine contains (Fig. 2) the stator core 1, from the end of which the separator part 2 is located, and cast

winding consisting of rods 3, arc sections of frontal parts 4 and their connection 5 with rods 3. The basic principle of the construction of a dividing part 2 (Fig. 5-7) consists in making holes (grooves) 6 that fix a different inclination to the core axis and forming a channel from the groove of the core to one of the concentric circles, on which the arc sections of the frontal parts are located (Fig. 1-4). This achieves the separation of these channels from one another and from the corresponding arc sections of the frontal parts. The separating part must be sufficiently thick (3-30 mm). The use of such a configuration of a dividing part immediately results in a simple separation between the arc sections of the frontal parts. It can be carried out by annular protrusions 7 of the separating part and its radial protrusions 8, which divide the rings into separate sections (Fig. 6 and 7). The arc sections of the frontal parts of different phases are made in the same plane, perpendicular to the shaft axis, and occupy an area from the bore to the outer diameter of the core, which significantly reduces the axial length of the filled core. The separator part 2 is made of a cement-based material with a new specific resistivity. The arc sections of the frontal parts can be formed by protrusions of the mold, when removed, air gaps 9 are formed, similar in configuration to the protrusions 7 and 8, as shown in FIG. 3, 6, 7. This simplifies the separation part. Due to some sharpening of the core, it is possible to form the joints of the rods with the corresponding arc sections due to the unequal grooves of the extreme sheets and holes 10 (Fig. 10) of the separator without inclination, which corresponds to FIG. 9. In this case, the thickness of the dividing part is reduced, and, consequently, the efficiency of the engine is increased. “PREDETECTION 1. Electric equipment, for example, an asynchronous motor with a molten core winding, each wire of which is located in a separate core, and the arc sections of the frontal parts are located in several, but the number of phases K1101ggrmichesky circles, characterized in that, in order to simplify the design and reduce the size of the machine, on the core of the core there is a separating part, at the end of which there are arc sections of the winding frontal parts, aligned in the same plane, and the connection of arc sections The supporting parts with corresponding rods are fitted in the holes of the separating part. 2. The electrical machine according to claim 1, clause 1; and with the fact that the Iaza of the outermost sheets of the core, containing the conductors of one phase, have a height corresponding to the location of the arc sections of the frontal parts of this phase. 3. The electrical machine according to claim 1, characterized in that, in order to balance the phases, the arc portions of the frontal portions of each phase are located on one side of the core with a larger diameter and above).

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