SU1396214A1 - Linear electric motor - Google Patents

Abstract

The invention relates to electrical engineering and can be used in drives of transport mechanisms. The aim of the invention is to increase the pulling force. The electric motor contains a fixed part consisting of two rows of alternating spas. There are prismatic and U-shaped flat protrusions 1 and 2 arranged in the form of a strip. pole projections. The interaction of the main magnetic flux and the currents of the winding of the core ensures the emergence of an electromagnetic force, under the action of which the moving part moves. A positive effect is achieved by more complete use of the active surface of the core magnetic cores. 4 il.

Description

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The invention relates to electrical engineering, in particular to electrical engineering, and can be used in drives of industrial and transport mechanisms.

The purpose of the invention is to increase the specific pull force.

FIG. 1 shows a linear electric motor, front view; in fig. 2 shows section A-A in FIG. one; in fig. 3 - movable part, a crust magnet conductor with a source of magnetomotive force (MDS) in the form of permanent magnets; in fig. 4 shows the principle of exciting pole projections by a moving source of MDS.

The stationary part of a linear electric motor consists of two rows of opposite projections of different constructive shapes, U-shaped 1 and prismatic 2, which alternate but the length of the stroke in a checkerboard pattern.

The mobile part of the engine consists of two core magnetic cores 3 and 4, united by a ferromagnetic rm 5 and carrying in their grooves the winding core 6, and connected to them by means of fixing non-magnetic parts 7 and 8 of the source 9 MDS in the form of two permanently located one above the other magnets 10 and 11 with pole shoes 12 and 13.

The pole protrusions are mounted on a common non-magnetic base 14.

As can be seen from FIG. 1-4, the secondary part consists of two pole protrusions 1 and 2 of various shapes, and their arrangement is such that the entire active surface of the movable part is completely above the excited pole projections, which causes an increase in the specific tractive force of the linear motor.

This is achieved by the fact that the source 9 MDS, located between two rows of pole lugs 1 and 2, consists of two permanent magnets 10 and 11, placed so that with their end parts they are adjacent to the corresponding surfaces of pole lugs 1 and 2 ( in Fig. 4, these surfaces are shown by hatching), providing the required order of excitation of pole lugs, when moving a linear electric motor.

The distance between the two rows of pole protrusions is determined by the estimated height of the permanent magnets, and the distance between the pole protrusions 1 and 2 along the stroke is equal to () and is determined based on the permissible scattering flux between each pole protrusion of different polarity N and S.

The permissible values of the dispersion fluxes are also determined by the size and shape.

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pole protrusions 1 and 2 and, in addition, the distance between the permanent magnets 10 and 11. Using pole shoes 12 and 13 on the end surfaces of the permanent magnets allows for a more efficient use of the permanent magnet.

The linear motor works as follows.

The magnetizing force of the permanent magnets 10 and 11 creates a main magnetic flux Fo in the magnetic circuit, which closes along the way (Fig. 1, 3 and 4): the N pole of the magnet 10, the pole protrusion 2 of the core zone of the core magnet 3, PMO 5, magnetic core 4, pole projection 2, pole S of magnet 10; pole protrusion 2, crust magnetic core 3, pole protrusion 1, pole N of magnet 11. Similarly, the main magnetic note is closed from pole of permanent magnet 11: pole 0 projection G, magnetic conductor 4, pm 5, magnetic conductor 3, pole protrusion 1, pole S of magnet 11; pole N of magnet 11, pole protrusion G, magnetic core 4, pole extrusion 3, pole S of magnet 10.

The interaction of the yut of Fo and the currents of the winding sections of the core 6, which lie above the pole projections 1, G, 2, 2, creates an electromagnetic force, under the action of which the moving part begins to move.

An electromechanical or semiconductor switch switches the current in the winding sections of the core 6 as it moves, so that in the conductors that are currently opposite pole projections of one polarity, its direction remains the same as the linear motor moves.

Speed control and motor reversal are made by methods similar to those used in conventional DC electric drives.

0 Instead of permanent magnets in the proposed design, it is possible to use electromagnetic excitation.

Claims (1)

Invention Formula An inductor-type linear electric motor consisting of a movable part containing a winding core and a source of magnetomotive force, and a fixed part in the form of a series of prismatic pole projections distributed Q in chess order, characterized in that, in order to increase the pulling force, part of the projections are made U-shaped, they alternate with prismatic projections, and the source of the magnetomotive force consists of two permanent magnets located one above the other, equal to the length of the movable part and placed between the rows of the indicated pole protrusions. 0 five five 5-3AgA / eight / Faye. 2 sri.Z figl