SU1515279A1 - Secondary element of linear inductor motor - Google Patents

Abstract

The invention relates to electrical engineering and can be used in magnetic suspension transport systems. The aim of the invention is to reduce energy consumption and simplify manufacturing technology. The secondary element consists of individual longitudinally laminated modules - long longitudinal sections 1 and short transverse sections 2 pressed by pressure plates 3 and 4, the base 5, formed by transversely installed ferromagnetic strips, between which gaps are made. A positive effect is achieved by reducing the eddy currents, ensuring a uniform distribution of the magnetic field and ease of manufacture with different active surface configurations. 1 hp f-ly, 3 ill.

Description

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The invention relates to a plectrotechnique, and in particular to the design of a linear and a noise motor with an W-shaped magneto-conductor core used to pull and lift the crew of a motorized magnetic suspension system.

The purpose of the invention is to reduce energy consumption and simplify manufacturing technology.

Fig. 1 shows a horizontal element of a linear inductor electric motor with a rectilinear active surface; FIG. 2 - secondary element, with arc active surface, cross section; in FIG. 3 a secondary element in place. the gap between the longitudinal sections, the longitudinal section

The secondary element consists of separate modules, each of which is made of longitudinal 1 and transverse 2 sections. The longitudinal sections are laminated with electrical steel sheet and pressed using pressure plates 3, the width L of the longitudinal sections 1 is equal to or slightly larger than the width of the side poles of the electric motor core with the W-shape of the magnetic core.

The transverse section 2 consists of a core, laminated longitudinally by electrical steel, compressed by means of Pressure plates 4 and a base 5, which is made in the form of transversely installed ferromagnetic strips, between which there is some gap L, which reduces eddy currents in the bases 5, The number of ferromagnetic strips in one base 5 of the transverse section 2 must be even (in FIG. 1 two are shown, and in FIG. 3 four ferromagnetic strips). The even number of ferromagnetic strips 3 (FIG. D) are azhdoy transverse section The balance is necessary for the magnetic field vozbutkdeni

in the joints of the longitudinal section.

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For the same purpose, the gaps between the modules of the longitudinal sections are located in the middle of the bases of the transverse sections in the gap between the ferromagnetic poles. The pressing plates 3 and 4 are made in the reed angles, with the help of which the longitudinal sections 1 and the cores of the transverse sections 2 are tightly fixed ts to fsr; 1st, 11-it gnuyu strips basis

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5, The transverse sections are installed discretely in the longitudinal nl 11ranle) 1i with a pitch that is equal to double pole division (see, fig 1) of the windings of the armature

electric motor. The width bc of the core of the transverse section 2 is equal to or slightly larger than the width of the central pole of the electric motor core, and the length of 1c transverse section 2 is equal to yC, where y is the pole overlap coefficient; i is the pole division of the winding of the electric motor core. At the same time, the above dimensions b, b, 1 c and the discreteness step of the transverse sections are necessary to ensure the normal operation of the linear inductor motor with the W-shaped core of the core.

Fig, 2 shows a cross section of the same secondary element, but with an arc active surface. In FIG. 3, it can be seen that the gap n between the longitudinal sections 1 lies in the middle of the base 5 of the transverse section 2 (between the second and third ferromagnetic stripe in the area of the gap between them and,).

Since in the central part of the secondary element 4 the teeth alternate with the windows, the excitation flow is modulated in the longitudinal direction. The pull force rises due to the interaction of the magnetic flux of the core F (which is a running one with a multi-phase winding of the core) modulated} in the longitudinal direction by the magnetic excitation flux,

The advantage of the proposed design is that the laminated magnetic core of the secondary part of devices with electromagnetic suspension reduces to a minimum the eddy currents induced in it by the magnetic excitation flux when moving the scientific research institute, and this reduces the damping effect of the secondary magnetic field on the excitation field, which is ultimately reduces the electrical losses in the secondary element, the power consumption of the winding of the excitation of the electric motor, In the magnet line, the additional magnetic current is also reduced. s electric loss from. higher harmonic magnetic field of the core and exciton. The construction of secondary elrmetggl is technologically advanced and easy to use on top 1.

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the conditions of the experience of the so-called (.: g

The manufacturing process, especially when it comes to making a secondary element with a curvilinear active vrchnost.yu, actually, it does not pose any difficulty to put together laminated sticks of longitudinal and transverse ceKiuiii with a given curvature of the surface. It is necessary only after compressing the packages with pressure plates to treat the surface with which they come into contact with the bases of the transverse sections. Compliance with the above condition of finding a discontinuity between the individual longitudinal sections ensures a uniform distribution of the magnetic field of excitation along the length of the electric motor, since the base of the transverse sections through which the magnetic excitation flux closes is symmetrically located to the adjacent longitudinal sections, which eliminates the uneven distribution of the magnetic excitation flux over the individual ferromagnetic stripes of the base and their possible magnetic saturation.

Claims (2)

Claim 1, Secondary element of a linear inductor motor, containing / G Of 9 sticking to a ferromagnetic strip, made with lateral longitudinal parts and a discrete central part, made with holes along the longitudinal axis at a distance, p. double pole division, in order to reduce energy consumption and simplify manufacturing technology, it is equipped with pressure plates and base, made in the form of ferromagnetic strips separated by a gap, and made in the form of separate longitudinally prepared modules, side sections which are made in the form of longitudinal sections, and the central part of the transverse sections placed on the Hi-oi base, the sections are mounted with pressure plates, made in the form of corners, attached to the base, which is made of even h weakly ferromagnetic strips 2. The element according to claim 1, characterized in that the side parts of the longitudinal sections of the individual modules are interconnected in the gap between the ferromagnetic strips in the middle bases between the transverse sections. .З