RU2402860C1 - Linear asynchronous motor - Google Patents

Abstract

FIELD: electricity. ^ SUBSTANCE: linear asynchronous motor contains an inductor composed of a core (1) with a multi-phase winding (2), a secondary element (3) containing a core (4) in the grooves whereof, one over another, insulated conductive rods are positioned (5) closed on one side with a common conductive bus (6) and on the other - with a closing cylinder (7) composed of a conductive part and an insulating part, with a handle (8). The grooves of the core (4) of the secondary element (3) contain a central part (9) perpendicular to the horizontal axis of the closing cylinder (7). Adjacent thereto at identical angles on both sides are side parts (10 and 11). All the conductive rods shaped matches that of the groove. Adjacent to the central parts (9) on both sides are additional parts (12 and 13), serving as their extensions and perpendicular to the closing element (7) axis. ^ EFFECT: increased draught power. ^ 4 dwg

Description

The invention relates to the field of electrical engineering, and more precisely to linear asynchronous motors (LAD), intended for electric drives with rectilinear or reciprocating movement of the working bodies and high-speed transport.

A linear asynchronous motor is known, comprising an inductor consisting of a core and a three-phase winding, and a secondary element consisting of a core, in the grooves of which are insulated conductive rods, one after the other, closed on one side by an electrically conductive bus, and on the other by a closing cylinder, consisting of electrically conductive and insulating parts installed with the possibility of rotation around its horizontal axis (see, for example, AS USSR No. 1350778, IPC Н02К 41/025, 1987, RF patent No. 1823094, Н02К 41/025, 1993 , A.S. USSR No. 110461 9, IPC Н02К 41/025, 1984).

These LADs develop insufficient traction.

Closest in technical essence to the claimed one is LAD containing an inductor consisting of a core and a three-phase winding, and a secondary element consisting of a core, in the slots of which are located one above the other insulated conductive rods closed on one side by a common conductive bus, and with the other is a locking cylinder consisting of electrically conductive and insulating parts, mounted to rotate around its horizontal axis, the grooves of the core of the secondary element contain the traverse part perpendicular to the horizontal axis of the closing cylinder, and the side parts adjacent to it at equal angles on both sides, while all the electrically conductive rods repeat the shape of the groove (see Pat. RF application No. 2008104745/09 (005161), IPC Н02К 41 / 025, 2008). This LAD is selected as a prototype.

This LAD develops not enough traction. This is a disadvantage of the prototype.

The technical task of the present invention is to eliminate the noted drawback in the developed design of a linear induction motor.

The solution of the technical problem noted is achieved by the fact that in a linear induction motor containing an inductor consisting of a core and a three-phase winding, and a secondary element consisting of a core, in the slots of which are located one above the other insulated conductive rods closed on one side by a common conductive bus, and on the other hand, a closing cylinder, consisting of electrically conductive and insulating parts, mounted with the possibility of rotation around its horizontal axis, the grooves of the core of the secondary electric The copings contain a central part perpendicular to the horizontal axis of the closing cylinder and side parts adjacent to it at equal angles on both sides, while all the electrically conductive rods repeat the shape of the groove, according to the invention, the grooves of the core of the secondary element contain the same additional parts adjacent to the central parts on both sides parts of the grooves and continuing them to the lateral edges of the core, and in additional parts of the grooves and continuing them to the lateral edges of the core, and at an additional hour Rep grooves are additional electrically conductive rods electrically connected on one side to the electrically conductive rods lying in the central portions of the grooves, wherein one of them is electrically connected with the other electrically conductive bus and the other - with a closing cylinder.

The execution of identical additional parts of the grooves of the core of the secondary element adjacent to the Central parts of the grooves and continuing them to the side edges of the core, the location of additional electrically conductive rods in them, electrically connected on one side with electrically conductive rods lying in the Central parts of the grooves, while one of them is electrically connected on the other hand with an electrically conductive bus, and others with a closing cylinder, these signs determine the novelty and significant differences of the claimed technical esky decisions.

The invention is further illustrated by an example of its specific implementation with reference to the accompanying drawings, in which:

Figure 1 depicts a General view of the LAD (cross section);

Figure 2 - secondary element LAD (in a plan view schematically);

Figure 3 shows the direction of action of the forces applied to the secondary element LAD, with a symmetrical arrangement of the secondary element relative to the inductor;

Figure 4 is the same with lateral displacement of the secondary element relative to the LAD inductor to the right.

LAD (Fig. 1) contains an inductor consisting of a core 1 and a three-phase winding 2. The secondary element 3 consists of a core 4, in the grooves of which are insulated conductive rods 5, one above the other, closed on one side by a common conductive bus 6, and on the other parties - closing cylinder 7, consisting of electrically conductive and insulating parts and equipped with a handle 8.

Figure 2 shows a schematic top view of the secondary element LAD. It can be seen that the grooves and the electrically conductive rods 5 contain central parts 9, side parts 10 and 11 and additional parts 12 and 13. The remaining designations are the same as in FIG. 1.

Figure 3 shows the forces acting on the secondary element with its symmetrical arrangement relative to the inductor (the inductor is schematically indicated in Fig. 3 by a dashed line). F _tsr - traction force acting on the central parts of 9 rods; F ₁ and F ₂ - forces acting on the side parts 10 and 11 of the secondary element, which decompose respectively into traction F _t1 and F _t2 lateral forces F _b1 and F _b2 . Additional parts 12 and 13 of the secondary element are affected by traction forces F _t3 and F _t4 . The remaining designations are the same as in figure 1, and figure 2. Figure 4 shows the same forces as in figure 3, but with lateral displacement of the secondary element relative to the inductor to the right.

Consider the operation of this linear induction motor.

When a three-phase winding 2 is connected to a three-phase voltage source, a traveling magnetic field is created that intersects the electrically conductive rods 5 of the secondary element and induces electromotive forces (EMF) into them. Under the influence of EMF, currents flow in the rods 5, which, when interacting with a traveling magnetic field, create forces that are indicated in different parts of the rods: in the central part 9 - F _tcp , in the lateral parts 10 and 11 - F ₁ and F ₂ , which decompose into forces - F _t1 and F _b1 , F _t2 and F _b2 ; in the additional parts of the rods 12 and 13 - F _t3 and F _{t4, the} secondary element starts longitudinal movement, and the same lateral forces F _b1 and F _b2 (Fig. 1 and Fig. 3) are mutually balanced and do not affect the movement of the secondary element of this LAD. These forces F _b1 and F _{b2 are the} same in magnitude with a symmetrical arrangement of the secondary element relative to the inductor. When the secondary element is displaced relative to the inductor to the right, part of the secondary element winding is outside the inductor (Fig. 4). Therefore, the forces F ₁ and F ₂ will become different in magnitude (F ₁ <F ₂ ), therefore, the equality of the transverse forces (F _b1 <F _b2 ) is simultaneously violated (Fig. 4). Under the influence of the sharpness of the transverse forces F _b2 -F _{b1, the} secondary LAD element will automatically return to a symmetrical position relative to the inductor (Fig. 1 and Fig. 3). Thus, automatic transverse self-stabilization of the secondary element relative to the LAD inductor will occur. In addition, the traction forces of this LAD will be greater than that of the prototype, since traction forces F _t3 and F _t4 appear additionally that arise in additional parts 12 and 13 of the secondary element. As with the prototype, by rotating the closing cylinder 7 (FIG. 1 and FIG. 2), it is possible to change the resistance value of the short-circuited winding of the secondary element and to control the amount of mechanical forces and the speed of the linear induction motor.

Compared with the prototype increased traction LAD.

Claims (1)

A linear induction motor contains an inductor consisting of a core and a three-phase winding, and a secondary element consisting of a core, in the grooves of which are insulated conductive rods, one above the other, closed on one side by an electrically conductive bus, and on the other by a closing cylinder, consisting of an electrically conductive and insulating parts installed with the possibility of rotation around its horizontal axis of the closing cylinder, and the side parts adjacent to it at equal angles on both sides, at m all the conductive rods repeat the shape of the groove, characterized in that the grooves of the core of the secondary element contain the same additional parts adjacent to the central parts of the grooves on both sides and extending them to the side edges of the core, with additional conductive rods electrically connected to the additional parts of the grooves one side with electrically conductive rods lying in the Central parts of the grooves, while some of them are electrically connected on the other side with electrically conductive bus, and others with a closing cylinder.

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