KR100777223B1 - Stator structure for linear motor - Google Patents

Abstract

A stator structure of a linear motor is provided to facilitate an assembly by being integrally assembled in a package type. A stator structure of a linear motor includes a mover. The mover is formed by winding a mover winding around a mover core, which is arranged around a stator core of a stator(10). A plurality of stator cores are arranged in a single row, and are fixed by being separated from each other at regular intervals by a spacer connected and arranged between bolts which are connected to a through hole penetrating the stator core.

Description

Stator structure for linear motor

1 is a perspective view showing a permanent magnet excitation transverse flux linear motor having a conventional E-type magnetic core;

FIG. 2 is an exploded perspective view showing a conventional stator core and a moving magnet permanent magnet disclosed in FIG. 1 separately; FIG.

3 is a perspective view showing an embodiment in which the stator according to the present invention is employed;

Figure 4 is a longitudinal cross-sectional view showing a field stator core along the line A-A of FIG.

5 is a schematic internal structural view showing the stator of FIG. 3 seen from above; and

Figure 6 is an exploded perspective view for explaining the coupling relationship between the stator core, long bolt, guide bar and cover according to the present invention.

<Description of Symbols for Major Parts of Drawings>

  1: moving magnetic permanent magnet 2: moving magnetic core

  3: mover winding 4: mover

  6: integrated stator core

 10: stator 11: field iron

11a: jamming portion 13: cover portion

 15: fixing bracket 20: long bolt

 21: guide bar 30: spacer

The present invention relates to a stator for a linear motor, and more particularly to a stator structure of a permanent magnetic flux transverse flux linear motor.

In general, a rotary motion is generated to obtain a linear motion, and the linear motion is obtained by using a linear motion converter such as a ball screw. When power is obtained by using a power transmission device such as a rotary electric motor and a ball screw, the system is complicated and a clean transfer system cannot be realized. In particular, in the case of using a linear motor, an induction linear motor or a permanent magnet linear motor is mainly used.

When the linear motor is used for the linear motion, the induction type linear motor has an end effect at the front and the rear part, and the performance is deteriorated, and when used as an integrated stator core by lathe on the stator side, the leakage of magnetic flux is increased. It requires a lot of excitation current on the mover side.

Accordingly, the linear induction motor has a problem of requiring a large thrust ratio (thrust generated per unit weight), low efficiency, large volume of propulsion device, and a large amount of energy.

In addition, when the permanent magnet linear motor is applied, the stator iron core is mainly formed of the stator core by laminating the stator core, and thus the material costs and processing fees are high.

In addition, when foreign matters are accumulated and fixed in the gaps between the neighboring stator cores, the leakage property of the magnetic flux increases with time, requiring more power consumption due to problems such as poor insulation. Is occurring.

SUMMARY OF THE INVENTION An object of the present invention is to provide a stator structure of a linear motor which reduces leakage of magnetic flux and solves problems such as accumulation of foreign matter in the gaps between stator cores.

The present invention

In the stator structure of a linear motor comprising a mover wound around the stator core of the stator, the mover winding wound around the stator core,

The stator core is composed of a plurality to be arranged in a line,

Each of the plurality of stator cores arranged in a row longitudinally is spaced and fixed at a predetermined interval by spacers connected between the long bolts connected to the through-holes passing through the stator iron cores.

Hereinafter, with reference to the accompanying drawings will be described a permanent magnetic flux transverse flux linear motor having an E-type mover iron core according to the present invention.

1 is a perspective view showing a permanent magnet excitation lateral flux linear motor having a conventional E-type moving magnetic core, Figure 2 is an exploded perspective view showing the conventional stator magnetic core and the moving magnetic permanent magnet separated from Figure 1, Figure 3 4 is a perspective view showing an embodiment in which a stator according to the present invention is employed, and FIG. 4 is a longitudinal cross-sectional view showing a field stator core according to the line AA of FIG. 3, and FIG. 5 is a top view of the stator of the present invention. Figure 6 is a schematic internal structure, Figure 6 is an exploded perspective view for explaining the coupling relationship of the stator core, long bolt, guide bar and cover according to the present invention.

As shown in FIG. 1, the electric motor includes, for example, an E-shaped moving permanent magnet 1, a moving magnetic core 2, and a moving magnetic winding 3. At this time, the mover permanent magnet 1, the mover core 2 and the mover winding 3, as shown in Fig. 1, combine with each other to form a mover (4).

The mover winding 3 is installed at the center of the E-shaped moving permanent magnet 1 and the moving magnetic core 2. A space δ is provided between the mover 4 and the stator core 5, and suction and propulsion force are generated between the mover 4 and the stator core 5.

At this time, the thrust is generated in the center and side of the iron core by arranging the moving magnetic core (2) in the E-shape, the suction force generated from the side of the E-shaped mover (4) and the side of the stator magnetic core (5) cancel each other The mover 4 can be arranged to reduce noise.

In addition, since the permanent magnet 1 and the mover winding 3 are provided on the shorter primary side, and the stator core 5 is provided on the long side, the material cost is less required and the mover winding 3 ) Is installed in the center of the E-type mover (4) to save the amount of winding.

In addition, as shown in FIG. 2, the moving permanent magnet 1 is inserted between the moving magnetic cores 2, and the magnetic poles of the moving permanent magnet 1 are alternately arranged in the order shown in FIG. N, S stimulation alternates with the iron core (2). At this time, the pair of the moving permanent magnet (1) and the moving magnetic core (2) forms one pole spacing.

In addition, the moving permanent magnet (1) and the moving magnetic core (2) is installed in the n-type iron core symmetrically, and placed in the middle of the short moving magnetic permanent magnet (1) and the moving magnetic core (2) in the middle to be arranged in E do. At this time, in order to generate the driving force in only one direction, the moving magnet permanent magnet (2) and the moving magnet permanent magnet (1) such that the symmetrical part and the middle part of the moving magnet permanent magnet (1) and the moving magnet core (2) are twisted left and right by τ. ).

Then, the moving wound winding (3) is disposed in the center of the E-type moving permanent magnet (1) and the moving magnetic core (2).

In addition, the mover winding (3) is formed in a very simple rectangular shape, it is wound to the left and right in the center portion of the E-type moving permanent magnet (1) and the moving magnetic core (2), and in some cases also possible to parallel circuit do.

Figure 4 according to the present invention, the moving magnetic permanent magnet (1) for generating a thrust in the center and side of the moving magnetic core (2) and the moving magnetic winding (3) installed so as to wind from side to side in the central portion of the moving magnetic core (2) The stator structure of the transverse flux linear motor including the mover 4 for canceling the suction force generated from the side of the mover 4 and the stator core 11 provided with each other, is divided into spherical or rectangular parallelepiped. The stator 10 which consists of the stator core 11 is illustrated.

The stator 10 includes a stator core 11 in which a mover wound around a mover winding is disposed around the mover core, and the stator cores 11 are arranged in a row in a row.

In addition, each of the plurality of stator cores 11 arranged in a row in a row is connected to the spacers 30 arranged between the long bolts 20 connected to the through holes 11a passing through the stator cores 11. Spaced apart at regular intervals.

The stator core 11 of the stator 10 is configured as a stator core 11 laminated with a steel plate 12 in a divided form and cut into field-shaped stator cores 11 or rectangular parallelepiped formation.

In addition, the field stator core 11 is configured as a package together with a cover portion 13 covering the whole in a state arranged in a line longitudinally at a predetermined interval.

In addition, both ends of the field-shaped stator core 11 are provided with a pair of engagement protrusions 11a and 11a which protrude more than the side surfaces of the stator core 11, and the engagement protrusions 11a and 11a have A pair of fixing brackets 15 and 15 having both ends bent to surround the engaging protrusions 11a and 11a of the field type stator core 11 is mounted.

Here, the field-type stator core 11 is arranged using the L-shaped fixing bracket 15 having a fixed hole 15a at a predetermined interval at the side end of the stator core 11 by arranging the iron cores 11. When the cover is configured to be able to prevent the departure and deformation of the stator core (11).

In addition, both ends of the cover portion 13 are bent to surround the engaging protrusion 11a of the field-shaped stator core 11.

In addition, the field stator core 11 is configured as a package together with a cover portion 13 covering the whole in a state arranged in a line longitudinally at a predetermined interval.

The spacer 30 is part of a member for securing a spacing connected between the long bolts 20, and a pair of bushes 31 and 31 connected in a double connection between the stator cores 11. It consists of.

In addition, the spacer 30 is a spacer that is arranged to be connected between the long bolt 20, may be composed of a pair of bolts 33, 33 are connected in a double connection between the stator core (11).

Further, both ends of the lower side of the stator core 11 have a pair of engagement protrusions 11a and 11a protruding from the side surface of the stator core 11, and the field protrusions are provided on the engagement protrusions 11a and 11a. A pair of fixing brackets 15 and 15 that are bent to surround the engaging protrusions 11a and 11a of the stator core 11 is mounted.

In addition, the cover portion 13 may be formed to be stepped or bent so as to surround the engaging protrusions 11a and 11a of the field-shaped stator core 11, and intermittently formed through the fastening holes with a predetermined interval.

Further, the stator 10 is parallel between the stator cores 11 by guide bars 21 connected to the stator cores 11 and the guide holes 11c and 11c formed on both sides of the through hole 11b. It is integrally coupled to assist the state.

The spacer 30 is preferably made of an insulating material.

In addition, the field-shaped stator iron core 11 in which the plurality of steel sheets 12 are stacked is constituted by a rectangular iron core, and the periodic interval is 2τ. When a force is generated from the upper surface on the left and right sides of the iron core, the split type stator cores 11 are separated from each other so that the cover portion 13 is formed as a support.

When the stator 10 having the above-described configuration is applied to a linear motor for permanent magnets, the core of the stator 10 is trimmed and processed into a plurality of steel sheets 12, and then laminated into a field shape, and the stacked stator By arranging each of the iron cores 11 in a row at regular intervals (2τ) and manufacturing them in a cover method using formwork or injection molding molds, the overall manufacturing cost can be greatly reduced, and on-site installation In the case of being able to assemble collectively in a package form, it is very effective that the assembly efficiency can be improved.

Moreover, there is no fear that foreign matters may accumulate in the gaps between the neighboring stator cores 11 and adhere to each other, thereby ensuring insulation with the neighboring stator cores 11, thereby improving reliability and eliminating leakage flux. There is an additional effect to reduce the power consumption.

As described above in detail, according to the present invention, the leakage of the magnetic flux is reduced, and when the field installation is carried out, assembling in a package form is possible, thereby greatly improving the assemblability.

In addition, there is a very excellent effect that can provide the structure of the stator 10 of the linear motor to cover the problem of the foreign matter accumulated in the gap between the core of the stator 10 by covering the cover.

In the above, the present invention has been illustrated and described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments, and the present invention is not limited to the spirit of the present invention. Various changes and modifications will be possible by those who have the same.

Claims (9)

In the stator structure of a linear motor comprising a mover wound around the stator core of the stator, the mover winding wound around the stator core, The stator core is composed of a plurality to be arranged in a line, Each of the plurality of stator cores arranged in a row longitudinally is spaced and fixed at a predetermined interval by spacers connected between the long bolts connected to the through-holes passing through the stator iron cores. The method of claim 1, The stator iron core is a stator structure of a linear electric motor, characterized in that the stator iron core is configured by laminating steel sheets in a divided form. The method of claim 1, The stator core of the field type stator structure of a linear motor, characterized in that consisting of a package with a cover portion covering the whole in a state arranged in a row at a predetermined interval. The method of claim 1, The spacer is a stator structure of a linear motor, characterized in that the pair of bushes. The method of claim 1, The spacer is a stator structure of a linear motor, characterized in that the pair of bolts. The method of claim 1, The lower both ends of the stator core has a pair of engaging protrusions protruding more than the side of the stator core, and the engaging protrusion has a pair of fixing brackets bent at both ends to surround the engaging protrusion of the field stator iron core. Stator structure of a linear motor, characterized in that mounted. The method of claim 6, The cover part is a stator structure of a linear motor, characterized in that both ends are bent to form a step so as to surround the engaging protrusion of the field stator iron core. The method of claim 1, The stator is a stator structure of the linear motor, characterized in that the stator core is integrally coupled to assist the parallel state between the stator core by the guide bar connected to the guide hole formed on both sides of the through hole. The method of claim 1, The spacer is a stator structure of a linear motor, characterized in that made of an insulating material.

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