SU1343511A1 - D.c.linear motor - Google Patents

Abstract

The invention relates to electrical engineering, to electric drives of mechanisms with linear movement of the working member. The goal is to increase reliability by eliminating uneven loads on the supports of the moving part by compensating for the efforts of a one-sided magnetic attraction. ., J The linear electric motor contains a movable part, including a U-shaped magnetic circuit 1, with poles 2 and a winding 3 and an excitation system consisting of three permanent magnets, one of which 4 is located on the dentate layer of the pole 2, and the other two 5 - at the ends of the magnetic circuit 1. The stationary part consists of the base 6, on which the middle 7 and the extreme 8 protrusions are arranged in three rows in a checkerboard pattern. Permanent magnets 9 are placed between the middle protrusions, and between them are permanent masses 10, the polarity of which is opposite to the polarity of the permanent magnets 4 and 5 of the movable part. Due to this, the main flux created by the permanent magnets 4 and 5 is compensated by the flux of the permanent magnet 9, which eliminates vibrations from the uneven load on the support arms. 2 Il. S (L Rig.1

Description

eleven

The invention relates to electrical engineering and can be used in electric drives with

linear movement of the working body.

The purpose of the invention is to increase reliability by eliminating uneven loads on the supports of the movable part by compensating for the strength of one-sided magnetic attraction.

Figure 1 shows the structural scheme of the proposed linear DC motor; 2, secondary view, top view.

A linear DC motor consists of a movable part, which includes a U-shaped magnetic conductor 1, at least one pole 2 with a pole winding 3, and an excitation circuit, which consists of three permanent magnets, one of which 4 is located on the toothed layer of the pitch pole 2, and the other two 5 - at the ends of the U-shaped magnetic conductor I. The fixed part of the engine consists of the base 6 - the secondary section of the frame (fig. 1 and 2), in which in three rows, pole-forming protrusions 7 are located, which are in the middle There are rows, and the protrusions 8 are in the extreme rows.

The distance between the axes of the pole-forming protrusions 7 and 8 along the stroke length is equal to the width of the two sections of the pole winding 3. There are permanent magnets 9 between the middle projections, and permanent magnets 10 between the outermost ones so that the polarity of the permanent magnets 9 and 10 of the fixed part opposite to the polarity of the permanent magnets 4 and 5, respectively, located on the movable part. The path of magnetic flux closure in the secondary part is shown by a dotted line in FIG. 2

The engine works as follows.

The permanent magnets 4 and 5, located respectively at pole 2 and U-shaped magnetic core 1, create

d

five

0 5

0

five

0

five

0

the magnetic flux F, and the path of the closure passes through a permanent magnet 5, an U-shaped magnetic circuit 1, a pole 2, a pole-forming protrusion 7, a secondary secondary part 6, a pole-forming protrusions 8 and an air gap marked by the projections 8 and magnets 5. On the pole winding 3 flows Current 1d, the direction of which is shown by arrows in Figures 1 and 2. A part of the winding, which is located above the permanent magnet 9, does not take part in the creation of the tractive effort of the engine, since the main flow created by the permanent magnets 4 and 5 is compensated by the flow create It is a permanent magnet 9. Therefore, the force F is created by the part of the pole winding located under the pole-forming protrusion 7 and is directed along the arrow F (Fig. 1).

The technical advantages of the proposed engine include the reduction of wear and the number of repairs of the support supports of the core, in connection with the elimination of vibrations from the uneven load on the support supports.

Claims (1)

Invention Formula A linear DC motor, consisting of a movable part in the form of a U-shaped magnetic circuit, between whose ends at least one pole with a winding and a polarizing permanent magnet is fixed, and a fixed part in the form of a ferromagnetic strip with protrusions arranged by rows and permanent magnets fixed along the middle line of the strip, characterized in that, in order to improve the reliability of the engine, part of the projections in the outer rows of the ferromagnetic strip, as well as the ends of the U-shaped magnetic core, are provided with constant nitami, wherein the protrusions with magnets on a fixed part arranged in staggered between the projections without magnets and have a polarity opposite to the polarity of the movable portion magnets. Editor A. Shandor Compiled by V.Narovlsky Tehred M. Khodanich Proofreader A. Ilyin Order 4834/54 Circulation 659 Subscription VNIKLI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4