KR100753460B1 - Linear Motor with permanent magnet excitation - Google Patents

Abstract

The present invention is for linearly transporting a carriage supported on a pair of rails fixed to a pedestal on the rail, the magnetic flux linear including a stator installed on the pedestal between the rails and a mover for supporting the pedestal. In the motor, the mover has alternating magnetic poles while the moving magnetic core moves between two permanent magnet directions while the magnetic flux Φ is generated through the moving magnetic core, the permanent magnet and the stator magnetic core when a current flows through the moving magnet winding. The magnetic flux is characterized in that the magnetic core and the permanent magnet is arranged to be twisted by τ _p to generate a force in the same direction in the air gap, the mover is composed of a pair of the core and the permanent magnet coupled in block units via a coupling member Provide a linear motor.

Description

Linear motor with permanent magnet excitation

1 is a perspective view of a linear transfer apparatus employing a magnetic flux linear motor according to the present invention;

Figure 2 is an exploded perspective view of the magnetic flux linear motor employed in the magnetic flux linear transfer device of FIG.

3 is an exploded perspective view of a stator employed in the magnetic flux linear motor of FIG. 2;

4 is an exploded perspective view of a mover employed in the magnetic flux linear motor of FIG. 2;

FIG. 5 is a diagram illustrating a relative arrangement relationship of a moving magnetic core and a permanent magnet and a stator magnetic core in the magnetic flux linear motor of FIG. 2; FIG.

6A, 6B, and 6C are diagrams for explaining the principle of the force generation of the magnetic flux linear motor of FIG. 2, and FIG. 6A shows a magnetic flux Φ through a moving magnetic core, a permanent magnet, and a stator magnetic core when a current flows through the moving winding 11. Figure 6b is a view showing the generation, Figure 6a is a diagram showing the easy to understand the force generation in the form of unfolding the stator core of Figure 6a in the form of unfolding up and down, Figure 6b is moved by the moving magnetic core τ _p in Figure 6b Figure showing the position when.

<Description of the symbols for the main parts of the drawings>

R ... rail 10 ... pedestal

20 ... feeder 100 ... stator

110 ... stator core 111 ... iron plate

111a ... steel plate groove 120,120 '... resin block

120a ... head hole 120b ... screw hole

130 ... engagement member 131 ... head

132 ... thread 200 ... mover

210 ... moving magnetic core 211 ... legs

212 ... Body 213 ... Side Bracket

214a ... head hole 214b ... screw hole

214c ... hole 220 ... permanent magnet

221 ... legs 222 ... body

230 ... engagement member 231 ... head

232 ... bolt 240 ... mobile winding

The present invention relates to a flux linear motor for a linear feeder that provides linear motion.

In general, obtaining linear power The linear feeder can obtain linear power from the rotary motion by including a linear motor such as a rotary motor that generates a rotary motion and a ball screw that converts the rotary motion into a linear motion. .

By the way, the linear transfer device composed of a rotary electric motor and a linear changer has a problem that the overall system configuration is complicated, and the size must be large.

Based on the above problems, in order to implement a linear transfer apparatus that can be reduced in size as a simpler structure, it employs a linear motor that generates a direct linear motion instead of a rotational motion.

The linear motor is provided between a pedestal having a pair of rails and a conveying table which is provided to be transportable on the rail, so as to linearly move the conveying table on the rail. The linear motor is composed of a stator installed on the support between the rails, and a mover installed at the lower part of the transport table to linearly transport the transport table by generating a transfer direction thrust with respect to the stator.

By the way, in the case of the linear motor as described above, it was not easy to securely fix the moving magnetic core and the permanent magnet constituting the mover alternately, and also to arrange the stator core constituting the stator, including the mover to form a long distance at regular intervals. There was a problem that it was not easy.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a magnetic flux linear motor for a linear transfer apparatus, in which the configuration of the mover and the stator is improved so that an easily assembled and uniformly spaced structure can be obtained. .

In order to achieve the above object, the magnetic flux linear motor for a linear transfer device according to the present invention is for linearly transporting a carriage supported on a pair of rails fixed to a pedestal on the rails. In the magnetic flux linear motor comprising a stator provided on the pedestal and a mover supporting the conveyer, the mover generates magnetic flux Φ through the moving magnet core, the permanent magnet and the stator magnetic core when current flows through the moving winding. The moving magnet core has an alternating magnetic pole as it moves between two permanent magnet directions, and is arranged to twist the moving magnet core and the permanent magnet by the polar interval τ _p to generate a force in the same direction at both voids. The iron core and the permanent magnet is characterized in that the pair consisting of a coupling unit via a coupling member.

In the present invention, the moving magnet core includes a side bracket which is bent in the conveying direction at both edges of the body except the leg, the side bracket is formed with a plurality of holes through which the coupling member passes. At this time, the permanent magnet is stuck between the moving magnetic core between the both side brackets.

In the present invention, the stator core and the resin block is fastened by the coupling member while the stator core and the nonmagnetic block are alternately arranged. At this time, the stator iron core is made by a plurality of iron plate is in close contact with the overall rectangular shape.

Hereinafter, a magnetic flux linear motor for a linear transfer device according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a linear transfer device employing a magnetic flux linear motor according to the present invention, Figure 2 is an exploded perspective view of a magnetic flux linear motor employed in the magnetic flux linear transfer device of FIG. 3 is an exploded perspective view of a stator employed in the magnetic flux linear motor of FIG. 2, FIG. 4 is an exploded perspective view of a mover employed in the magnetic flux linear motor of FIG. 2, and FIG. 5 is a magnetic flux linear motor of FIG. 2. Figure shows the relative arrangement between the moving magnetic core and the permanent magnet and the stator magnetic core.

As shown, the magnetic flux linear motor for a linear transfer device according to the present invention linearly transfers a carriage 20 supported on a pair of rails R fixed to the pedestal 10 on the rails R. To this end, it includes a stator 100 installed on the pedestal 10 between the rail (R), and a mover 200 for supporting the conveying table (20). At this time, the rail (R) is a linear bearing is installed so that the conveying table 20 is smoothly slid to the pedestal (10).

As shown in FIG. 3, the stator core 110 and the resin block 120 are coupled to each other in a state in which the stator core 110 and the resin block 120 are alternately disposed. It is formed linearly by combining using). Here, an example of interposing the stator core 110 between two resin blocks 120 and 120 'will be described in order to make the description easier.

The stator core 110 is formed by closely contacting a plurality of iron plates 111 having a rectangular shape as a whole. On the side of the iron plate 111 constituting the stator iron core 110, the iron plate groove 111a or the iron plate hole through which the bolt portion 132 of the coupling member 130 to be described later is formed.

The resin blocks 120 and 120 ′ are firmly positioned at the same time as spaced apart between the stator cores 110. Holes through which the head part 131 or the bolt part 132 of the coupling member 130 to be described later are formed at the corners of the resin blocks 120 and 120 ′. Here, the head hole 120a or the bolt portion 132 having a large diameter may be formed in the resin block 120 at the front end and the resin block 120 'at the rear end so that the head part 131 of the coupling member 130 may be embedded therein. A small diameter screw hole 120b is formed to be fastened.

Coupling member 130 is to maintain a block state by closely contacting the stator iron core 110 and the resin blocks 120, 120 'made of a plurality of iron plate 111 in close contact. The coupling member 130 may be used in various forms. In this embodiment, the head portion 131 is formed at the front end, and a bolt part 132 is formed at the rear end.

The stator 100 is implemented by arranging a plurality of block units formed by coupling the resin blocks 120 and 120 'to the coupling members 130 at both sides of the stator core 110.

The mover 200 includes a plurality of moving magnetic cores 210 and a moving magnetic core having an overall ∩ shape in which the legs 211 are twisted by a predetermined pole interval τ _p in the front and rear directions when viewed from the top. And a permanent magnet 220 having a generally ∩ shape, the legs 221 being twisted by a predetermined polar interval τ _{p in} the forward and backward directions so as to be in close contact with each other alternately with the plurality of moving magnetic cores 210. Coupling member 230 for coupling the permanent magnets 220 to be in close contact with each other to form a block, and a moving magnetic winding 240 for wrapping the plurality of movable magnetic core 210 and the same direction legs of the permanent magnet 220 coupling structure, respectively Contains

As shown in FIG. 4, the moving magnet core 210 includes side brackets 213 that are bent in a transport direction at both edges of the body 212 except for the legs 211, and coupled to the side brackets 213. A plurality of holes through which the member 230 penetrates is formed.

At this time, the hole has a variety of shapes, for example, the hole formed in the first mover iron core is a head hole 214a of a large diameter so that the head portion 231 of the coupling member 230 to be described later is embedded, the last mover The hole formed in the iron core is a screw hole 214b to which the bolt portion 232 of the coupling member 230 is coupled, and the hole formed in the moving magnetic core positioned in the middle of the body portion 233 of the coupling member 230 penetrates. It is a through hole 214c.

The permanent magnet 220 is almost the same shape of the remaining portion, that is, the leg 221 or the body 222 except for the side bracket 213 portion of the moving magnetic core. The permanent magnet 220 is sandwiched between the moving magnetic core 210 between the both side brackets 213 is in close contact.

Coupling member 230 is to maintain the block state when the moving magnetic core 210 and the permanent magnet 220 is in close contact with a plurality of blocks. The coupling member 230 may be used in various forms, in this embodiment, the head portion 231 is formed at the front end, the bolt portion 232 is formed at the rear end, the head portion 231 and the bolt portion ( The body portion 233 is formed between the 232 is used.

Coupling member 230 is the head portion 231 is embedded in the head hole 214a of the first iron core, the bolt portion 232 is coupled to the screw hole 214b of the last iron core, a plurality of moving magnetic core 210 And make the permanent magnet 220 to form a block.

The moving magnetic winding 240 surrounds each of the legs 211 and 221 in the same direction in a coupling structure in which a plurality of moving magnetic cores 210 and a permanent magnet 220 form a block shape.

The mover 200 is formed between several moving magnetic cores 210 having a ∩ shape in which the leg 211 is twisted by τ _p in the front and rear directions, and τ _{p in the} front and rear directions of the leg 221. After interposing the permanent magnet 220 of the shape twisted by as much as possible, using the coupling member 230 to fix the moving magnetic core 210 and the permanent magnet 220 in close contact. Thereafter, the same direction legs of the coupling structure of the plurality of moving magnet cores 210 and the permanent magnets 220 are completed by respectively wrapping the moving magnet windings 240. At this time, as shown in Figure 5, the permanent magnets 220 between the moving magnetic core 210, by alternately placing the magnetic poles (=>, <=), the magnetic poles of the N, S alternately in the moving magnetic core 210 Make it happen.

The magnetic flux linear motor of the present invention may be used by connecting a plurality of linear motors with a link (L), as shown in Figure 2 to obtain a larger output.

Next, the operation of the magnetic flux linear motor having the above structure will be described.

6A, 6B, and 6C are diagrams for explaining the principle of the force generation of the magnetic flux linear motor of FIG. 2, and FIG. 6A shows a magnetic flux Φ through a moving magnetic core, a permanent magnet, and a stator magnetic core when current flows through the moving winding 11 Figure 6b is a view showing the generation, Figure 6a is a diagram showing the easy to understand the force generation in the form of unfolding the stator core of Figure 6a in the form of unfolding up and down, Figure 6b is moved by the moving magnetic core τ _p in Figure 6b It is a figure which shows the position when it does.

As shown in FIG. 6A, when the current Ix _1a flows through the moving winding 240 of the magnetic flux linear motor, the magnetic flux Φ is generated through the moving magnetic core 210 and the permanent magnet 220 and the stator magnetic core 110.

At this time, when the moving magnet core 210 is between two permanent magnet directions (=>, <=), it has an N pole, and when it is between two permanent magnet directions (<=, =>), it has S poles. In order to generate a force in the same direction in the cavity, the moving magnet core 210 and the permanent magnet 220 are arranged to be skewed by τ _p (Skew).

As shown in FIG. 6B, when the current Ix _1a flows to the mover winding 240, the magnetic poles of the stator magnetic core 110 and the magnetic pole of the magnetic pole 110 are generated when magnetic fluxes of the north pole and the south pole of the south pole of the stator core 110 occur. 210) of the magnetic pole interaction is different from the in the direction of the equal repulsive force, magnetic pole orientation of the magnetic pole by using a suction force generated power as shown in the figures _{Fx 1, Fx 2, Fx 3} , Fx 4 has blossomed the combined power to the right direction F _x Occurs.

FIG. 6C illustrates a position when the moving magnet core 210 moves by τ _p in FIG. 6B. At this time, when Ix _2a is flowed by changing the direction of the current Ix _1a , an S pole above the stator core 110 and an N below the stator core 110. As the magnetic flux of the pole occurs, the combined force F _x of the forces Fx ₅ , Fx ₆ , Fx ₇ , and Fx ₈ is generated due to the magnetic interaction between the magnetic pole of the stator magnet 110 and the magnetic pole 210. Force is generated.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible.

As described above, according to the magnetic flux linear motor according to the present invention, the stator is realized by arranging a plurality of block units formed by coupling resin blocks with coupling members on both sides of the stator core, and the mover is a permanent magnet between several moving magnetic cores. By interposing the magnetic elements and permanent magnets in close contact with each other using the coupling member, the assembly of the stator and the mover can be facilitated as a result, thereby improving the overall assembly of the linear motor. .

Claims (5)

In a magnetic flux linear motor comprising a stator mounted on a rail between the rails and a mover for supporting the transport table, for linearly transporting a transport table supported on a pair of rails fixed to the support , The mover, when viewed from the top, a plurality of moving magnetic cores having a generally ∩ shape that the legs are twisted by a predetermined pole spacing (τ _p ) in the front and rear directions, and the moving magnetic cores are in close contact with each other alternately. A totally ∩-shaped permanent magnet formed so that the legs are twisted in a forward and backward direction by a predetermined polar interval (τ _p ), and a plurality of coupling members for coupling a plurality of moving magnetic cores and permanent magnets to form a block in close contact with each other; Includes a moving winding wound around the same direction legs of the moving magnetic core and permanent magnet coupling structure of, The mover has magnetic flux Φ generated through the moving magnet core, the permanent magnet and the stator magnet core when the current flows through the moving magnet winding, and the moving magnet core moves between two permanent magnet directions, and has alternating magnetic poles in the same direction in the gaps on both sides. The magnetic flux is characterized in that the moving magnetic core and the permanent magnet is arranged to be twisted by the polar interval (τ _p ) in order to generate a force, the mover is composed of a pair of iron core and the permanent magnet coupled in block units via a coupling member Linear motor. The method of claim 1, wherein the moving magnetic core, And a side bracket which is bent in a conveying direction at both edges of the body except for the leg, wherein the side bracket has a plurality of holes through which the coupling member penetrates. The method of claim 2, wherein the permanent magnet, Magnetic flux linear motor, characterized in that the close contact between the moving magnetic core between the two side brackets. The method of claim 1, wherein the stator, A magnetic flux linear motor, characterized in that the stator core and the resin block are fastened by a coupling member while the stator core and the resin block are alternately arranged. The method of claim 4, wherein the stator core, Magnetic flux linear motor, characterized in that made by a plurality of iron plate is in close contact with the overall shape.

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