SU1504748A1 - Linear d.c. motor - Google Patents

Abstract

The invention relates to electrical engineering and can be used in reciprocating electric drives. The goal is to simplify the fabrication technology and increase traction. The electric motor contains a primary part in the form of a U-shaped bed 1, on the inner surfaces of which there is a block of permanent magnets 2, spline elements 3, connected to the frame by non-magnetic V-shaped brackets 4 having two parallel shelves is attached to the frame, and the second shelf with the help of the grooves made in it is attached to the bracket tooth elements, which are made in the form of separate ferromagnetic T-shaped plates, between which the core winding is located 8 and the secondary part in the form of a series of prismatic ferromagnetic poles 5. The main magnetic flux created by the block of permanent magnets interacts with the core currents and creates an electromagnetic force that moves the moving part of the engine. A positive effect is achieved by the simplicity of assembling the dentate zone of the engine with an increase in the use of permanent magnets. 6 Il.

Description

. 31504

The invention relates to electrical engineering and can be used in electric reciprocating and rectilinear displacement of industrial and transport mechanisms.

The purpose of the invention is to simplify the technology of manufacturing an electric motor and increase its thrust,

Fig, 1 shows a constructive scheme of the proposed electric motor, end view; FIG. 2 is a section A-A in FIG. 1; Fig. 3 shows a non-magnetic reinforcing structure of the dentate zone, end view; 4 shows a view along arrow A in FIG. 3; in fig. 5 - section bb in fig.Z; on figb - element dentate zone of structural steel.

The electric motor consists of a primary part in the form of a U-shaped bed, on the inner surfaces of which there is a block of permanent magnets 2. Directly on the permanent magnets there is a tooth zone consisting of a series of ferromagnetic plates 3 T-shaped, combined with frame by means of 2-shaped non-magnetic brackets 4.

The secondary part of the electric motor is a series of prismatic ferromagnetic poles 5, each with value в and set one behind the other at a distance (} (1-б / -и), where i is the value of pole division, and о / J- pole overlap ratio .,.

; T-shaped teeth (fig.b) can be made as of constructions. taltsialnoy stalali and laminated.

The blocks of permanent magnets 2 are mounted on the inner surfaces of the side belts of the U-shaped bed 1, and the plates 3 are located directly on the permanent magnets 2 without a gap. At the same time, both permanent magnets and T-shaped teeth are fixed on the side frames by means of -shaped brackets 4 of non-magnetic material, for example, bolted joints.

The execution of the T-shaped teeth is due to two reasons: the need for rigid fastening of the T-shaped part of the tooth in the slots of the Z-shaped brackets 4 and the possibility of increasing the magnetic induction in the working air gap.

since, with the selected tooth configuration, a part of it with a smaller cross section is also a magnetic flux concentrate. The latter circumstance is especially important when using cheap ferrites in electric motors with a small amount of residual induction.

The non-magnetic bracket 4 is an element-shaped element with profiled milling slots b corresponding to the width b2 of the barb teeth and teeth 7 corresponding to the width L of the groove of the tooth zone of the cor.

Size ratio l. tooth and IJ} (Figure 6U is determined by calculation, depending on the required value of the magnetic induction in the working air gap of an electric motor for a selected type of permanent magnets. The method of Making a tooth and, accordingly, the entire tooth zone of the electric motor is much easier if the teeth are made of Ie a set of a package of a tooth from stamped sheets of electrical steel.

When assembled, a block of permanent magnets 2, plates 3 and mounting non-magnetic brackets 4 form a magnetically excited dentate zone (Fig. 1 and Fig. 2) with slots for stacking the winding sections 8 kop. ro, the reactions of the core in the proposed design of the electric motor can be closed partly along the rye of the U-shaped bed 1 (F p), and partly through the side surfaces of the plates 3 (F p n). In either case, the closure paths of the reaction flow components of the core have a low magnetic permeability and, accordingly, small values of Fr ,, which makes it possible to obtain large current overloads of the core.

In the proposed design of the electric Beater (as opposed to the prototype), the permanent magnets, 2 are not located on the tooth zones of the core, but under the teeth that do not have a common frame. This arrangement of permanent magnets makes it possible to usefully use the transverse magnetic flux Φ in the permanent magnets themselves, formed in that part of them which is currently located in. the gap between the poles of the secondary part.

The motor works as follows.

The magnetizing force of the blocks of permanent magnets 2 (FIG. 1 and FIG. 2

The main magnetic flux is created in the magnetic cores of the electric motor. When the power is supplied to the root winding 8, its conductors begin to flow around the current. The interaction of the magnetic flux and currents of the sections, which lie opposite the ferromagnetic poles 5 of the secondary part, creates an electromagnetic force, under the action of which the moving part begins to move.

The electromechanical or semiconductor commutator switches the currents of the sections as they move, so that the conductors of the core winding located at each moment against the poles 5, have the same direction when moving in one direction. . Speed regulation t motor reverse is done similarly

Claims (1)

method used in conventional electronic. resistors of direct current. Claims of the invention Linear motor of direct current, -containing P-oznu primary part with permanent magnets, perforated elements and winding and; the secondary part is in the form of a series of ferromagnetic prismatic poles, of which is characterized by the fact that, in order to simplify the manufacturing technology and increase the pulling force, it is equipped with non-magnetic Z-shaped The cuts are arranged in one of their parallel shelves to accommodate tooth elements, and the other shelf is rigidly connected to the side parts of the primary part, the tooth elements being made in the form of separate ferromagnetic T-shaped plates, the horizontal shelves of which rest on permanent magnets and placed in the slots of the brackets. Fi.Z AT 6 Fie.6