KR100480382B1 - Linear motor having coil modules - Google Patents

Abstract

The present invention relates to a linear motor having a stator provided with a permanent magnet and a mover having a coil moving in a straight line. According to the present invention, a stator having a magnet and a mover having a plurality of winding coils, wherein the coil is driven by the magnet, the mover is detachably coupled to the moving body and the moving body. There is provided a linear motor having a plurality of coil modules each having a plurality of winding coils. Each coil module may include a coil unit in which a plurality of flat coil and annular winding coils are arranged in a lateral direction, and may combine the coil modules to form a coil assembly such that each coil unit is parallel to each other. . In addition, the coil unit may have a connection portion exposed to the outside, each coil unit may be connected by a connector device with a built-in circuit connecting the connection portion. The connector device may be configured such that an internal circuit connects the coil units in parallel or in series.

Description

Linear motor with multiple coil modules {LINEAR MOTOR HAVING COIL MODULES}

The present invention relates to a linear drive device, and more particularly, to a linear motor having a stator provided with a permanent magnet and a mover provided with a moving coil device in a straight line.

A linear motor is an electric drive device comprising a stator having a magnet and a mover having a coil driven to linearly move along the magnet. Linear motors are widely used in applications requiring linear motion, such as semiconductor equipment and machine tools.

The linear motor is provided with a unit coil unit in which a plurality of unit winding coils are arranged and molded in resin such as epoxy. To increase the thrust, the mover uses a plurality of unit coil units, which are arranged side by side and fixed. When fixing the unit coil unit is fixed to a single mover block made of aluminum material using an adhesive or the like.

However, the mover configured as described above has some problems. The problem arises in the repair and replacement of the coil. The coil needs to be repaired or replaced due to excessive current flow through the coil. In this case, there is a problem in that work must be performed after separating the entire mover from the linear motor. In addition, once the detached mover is coupled to the linear motor, the encoder has to be newly set up and the signal has to be set again. Also, when combining the mover, the straightness, the squareness, and the like must be adjusted again. In the case of a combination product, there are various difficulties, such as disassembling parts of other linear motors or other devices, which depend on the mover.

SUMMARY OF THE INVENTION An object of the present invention is to provide a moving coil device having a coil and the like modularized to be detachable and coupled to improve the problem of the linear motor having a mover according to the conventional configuration. In addition, another object of the present invention is to provide a linear motor having a structure capable of separating only the coil assembly to which the coil is coupled from the linear motor without having to remove the entire mover from the linear motor. Still another object of the present invention is to provide a mobile coil device having a connection device for easily electrically connecting a plurality of coil modules that are easily separated.

According to an aspect of the present invention, a stator having a magnet and a mover having a plurality of winding coils, wherein the coil is driven by the magnet, wherein the mover has a moving body and the moving body. There is provided a linear motor having a plurality of coil modules detachably coupled to and provided with a plurality of winding coils, respectively.

Each of the coil modules may include a coil unit in which a plurality of flat coil and annular winding coils are arranged in a lateral direction, and may combine the coil modules to form a coil assembly such that each coil unit is parallel to each other. . In addition, the coil unit may have a connection portion exposed to the outside, each coil unit may be connected by a connector device with a circuit for connecting between the connection portion. The connection part may protrude, a connection terminal may be provided in the protrusion, and the connector device may be provided with a groove into which the connection part is fitted, and a terminal connected to the connection terminal of the connection part may be provided in the groove. The connector device may be configured such that an internal circuit connects the coil units in parallel or in series.

According to another aspect of the present invention, a coil unit used in a mobile coil device of a linear motor includes a plurality of generally flat and annular winding coils arranged transversely, arranged side by side with the coils, and connected to one end. There is provided a coil unit having a circuit board with exposed terminals, and molding the coil and the circuit board with a plastic resin so as to expose the connection terminal.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, the linear motor 10 includes a stator 20, a mover 30, a position sensing device 40, a linear motion guide 50, and a housing 60.

The stator 20 has a support frame 21 and a yoke 22. Support walls 23 and 24 are formed on both sides of the support frame 21 in parallel. The yoke 22 has a cross-sectional shape of 'E' shape and includes a vertically formed base portion 25 and three wings 26a, 26b and 26c extending horizontally parallel from the base portion 25. Permanent magnets 27 are respectively attached to the inner surfaces of the wing facing each other. The yoke 22 and the support frame 21 are fixed such that the outer surface of the base 25 of the yoke 22 is in contact with the inside of the support wall 22 of the support frame 21.

1 and 2 together, the moving coil device or the mover 30 is located above the stator 20, and the moving assembly 31 and the coil assembly 32 located below the moving body 31 are shown. Equipped. The moving body 31 is composed of a horizontal support 33, two connecting supports 34 provided on the horizontal support 33, and a coil assembly coupling part 35 provided below the horizontal support 33. do. Two connecting support 34 is formed to protrude in parallel vertically from the horizontal support 33, the object to be driven in the future linear motor is connected and coupled. Coil assembly coupling portion 35 is formed to protrude downward from the horizontal support (33). Coupling portion 35 is provided with a coupling groove 36 formed to be fitted to the coil assembly 32 to be described later. A fixed end 37 extending horizontally is provided under one side of the coupling groove 36.

The coil assembly 32 includes a fixing member 38 fitted into the coupling groove 36 of the movable body 31 and first and second coil modules 39 and 39a positioned in a line under the fixing member 38. Equipped. The fixing member 38 is a long rod-shaped member extending along the moving coil device, and a protruding locking portion 381 is provided at one side so that the fixing member 38 can be fitted to the coupling groove 36 formed by the fixing end 37. do. The two coil modules 39 and 39a have substantially the same appearance except for the connection portions 395 and 395a of the circuit boards 393 and 393a which will be described later. The first and second coil modules 39 and 39a are respectively fixed to one side of the first and second coil supports 391 and 391a and the first and second coil supports 391 and 391a, respectively. 2 coil units 392 and 392a are provided. The two generally flat coil units 392 and 392a are fixed to the respective coil supports 391 and 391a by a method such as bonding with an adhesive so as to be parallel to each other. The two coil supports 391 and 391a have a rod shape that extends as long as the fixing member 38.

Referring to FIG. 3, the first coil unit 392 includes a coil unit 394 and a first circuit board 393 coupled to an upper side of the coil unit 394. The coil unit 394 includes a plurality of winding coils 500. Each winding coil 500 is wound in a wire shape and has an operating coil portion 502, 504 that crosses the magnetic flux and a connecting coil portion 506, 508 that connects between these operating coil portions. When a current is applied to the winding coil 500, a Lorentz force may be generated in the working coil units 502 and 504 that cross the magnetic flux, thereby moving the coil. As can be seen in FIG. 3, each of the winding coils is formed between the driving coil portions 504a of the winding coils 500a and 500c of the other two phases between each of the driving coil portions 502b and 504b of one winding coil 500b. 502c) is arranged. As a result, the driving coil parts 502a, 502b, 504a, 502c, 504b, 502d, and 504c are arranged in a row. On the other hand, the connecting coil parts are offset (offset) by 1/2 of the thickness from the driving coil part so as to minimize the thickness of the coil unit and overlap each other. Although not shown in detail, hall elements are disposed in the winding coils 500a, 500b, and 500c of the first coil unit 392. The coil unit as shown in FIG. 3 can be said to be a coil core type. However, the coil unit of the present invention is not limited to the coil core type. For example, an air core coil unit can also be used.

3 and 4 (a) together, the first circuit board 393 is attached to one side of the portion where the coupling coil parts 506 of the plurality of winding coils are coupled. Conducting wires are formed on the substrate 393, and wire terminals, hall elements, and the like of each winding coil are connected. The first circuit board 393 includes a first connection portion 395 formed by extending one side thereof. The first connecting portion 395 includes all twelve connecting terminals 396. Six connection terminals 396 are provided on both sides of the connection portion 395. Six of the connection terminals are input / output terminals (three inputs / outputs, respectively) for three-phase power, and the remaining six are signal terminals HA, HB, and the like connected to a hall element provided in the winding coil 500. HC, VCC, GND, TS). Referring to Fig. 4B, the second circuit board 393a includes a connecting portion 395a having all six connecting terminals 396a. All six connection terminals are input / output terminals of the power supply. The second coil unit is not provided with a separate hall element or the like. Although not shown in the drawings, the coil assembly has a connector for connecting the connection of each coil unit. The connector will be described later in detail.

Referring to FIG. 3 again, in the first coil unit 392, the entire first circuit board 393 and the coil portion 394 except for the first connection portion 395 are molded (marked with dashed lines). Although not shown, the second coil unit 392a is also molded in the same form as the first coil unit 392.

Referring again to FIGS. 1 and 2, the fixing member 38 and the two coil modules 39 and 39a correspond to the coupling bolts 301 inserted through the fixing member 38 from the fixing member 38 to the lower coil module 39a and corresponding thereto. Is integrally coupled by a nut 302. The coil assembly 32 fitted into the coupling groove 36 of the movable body 31 is fixed by the horizontal support 33 and the fixing bolt 303 inserted into the coupling groove 36 from one side of the coupling portion 35. It is fixed in a more accurate position.

1 and 2, two coil units 392, 392a of the mover 30 are fixed to respective coil supports 391, 391a such that they are parallel to each other. The first coil unit 392 positioned above the two coil units 392 and 392a is inserted between the upper wing 26a of the yoke 22 and the permanent magnet 27 attached to the center wing 26b. . The remaining second coil unit 392a is inserted between the permanent wing 27 attached to the middle wing 26b and the lower wing 26c of the three wings of the yoke 22.

Referring back to FIG. 1, the linear motion guide 50 is installed between the stator 20 and the mover 30, and includes a linear motion block 52 and a linear motion guide rail 54. The linear motion guide rails 54 are fixed on top of each support wall 23 of the support frame 21. The linear motion block 52 is fixed below the horizontal support 33 of the mover 30. The position sensing device 40 is fixedly installed on the side of the horizontal support 33 of the mover 30.

The housing 60 is composed of the left and right side cases 62 and 64 and the front and rear flap members 66. The left and right side cases 62 and 64 are fixed to the support frame 21, the upper side of which is bent horizontally to cover the inside of the linear motor from above. The copper member 66 is fixed to both ends in the longitudinal direction of the support frame 21. In Fig. 1, only half of the flap member 66 is shown, which is generally symmetrical with respect to the cut face for illustration.

A process of separating and coupling the coil module from the linear motor of FIG. 1 will be described in detail with reference to FIGS. 1 and 2. First, the copper member 66 is separated from the linear motor 10. Then, the fixing bolt 303 is released from the upper side of the horizontal support 33 of the movable body 31 and one side of the coupling portion 35. Then pull the coil assembly 32 sideways from the coupling groove 36 to separate it. The coil assembly 32 completely separated from the linear motor 10 is disengaged from the coupling bolt 301 and the nut 302 to the fixing member 38, the first coil module 39, and the second coil module 39a. Decompose The bonding order is the reverse of the separation process. In this way, only the coil assembly can be separated from the linear motor without the need to separate the mover from the linear motor.

Referring to FIG. 5, the coil assembly 32f according to another embodiment may include a fixing member 38f and first, second, third and fourth coil modules 39c coupled in a row under the fixing member 38f. 39d, 39e, 39f, and connector block 80 are provided. Although the coupling between the holding member 38f and the four coil modules 39c, 39d, 39e, and 39f is not shown, the fixing member 38f and the four coil modules 39c and 39d are the same as the embodiment in FIG. , 39e, 39f) through the coupling bolt. The first, second, third, and fourth coil modules 39c, 39d, 39e, and 39f respectively have first, second, third, and fourth coil connections (indicated by dotted lines) 393c, 393d, 393e, and 393f. ). The first connecting portion 393c provided in the first coil module 39c is the same as that shown in Fig. 4A, and the second, third and fourth coil modules are the same as those shown in Fig. 4B. 6 connection terminals are provided rather than three connection parts 393d, 393e, and 393f provided respectively at 39d, 39e, and 39f.

5 and 6 together, the connector block 80 has a rectangular pillar shape, and the first, second, third, and fourth coil connections 393c, 393d, 393e, and 393f are fitted to one side thereof, respectively. First, second, third, and fourth connection grooves 82c, 82d, 82e, and 82f are provided, and on the opposite side, a power connection connector receptacle 84 and a signal connection connector receptacle to which power and an electrical signal from the outside are connected. 86 is provided.

A linear motor having a mover comprising four coil modules as described above should have a suitable yoke for it. Although not shown, the yoke has a longitudinally formed base and five wings extending laterally parallel from the base. On each of the inner surfaces of the wing facing each other, the permanent magnets face each other so that the four coil units enter each one of the wings of the yoke.

The characteristics of the linear motor vary depending on the case where several coil units are connected in series and in parallel. Therefore, using a connection suitable for the specification in the linear motor whose specifications are set according to the working characteristics, better operating characteristics can be obtained. In the present invention, the connection can be easily changed by, for example, replacing the connector block prepared by dividing the pre-wired circuit configuration into two types. That is, when the parallel connector block is mounted, the parallel connection characteristics can be obtained. When the serial connector block is mounted, the characteristics of the serial connection can be obtained. Of course, the present invention is not limited thereto, and a connector block may be understood by those skilled in the art from the following description that a configuration in which four coil units are connected in parallel and then connected in series is also possible.

7 and 8 are circuit diagrams of a parallel connector and a serial connector for connecting four coil units used in FIG. 5, respectively. In Fig. 7 and Fig. 8, the left side shows each terminal of the connection groove into which the coil connection parts 1 to 4 are fitted, respectively, and on the right side, the external three-phase power supply and six electric signal terminals HA, HB, HC, VCC. , GND, TS) are shown. Connection groove 1 has 6 power input / output terminals (3 inputs / outputs 3 each) and 6 electric signal terminals (HA, HB, HC, VCC, GND, TS). The three connection grooves of the power supply have six power input / output terminals (three inputs / outputs). For reference, IN A, B, and C of the first to fourth connection grooves indicate power input terminals of A, B, and C phases, and OUT A, B, and C indicate power output terminals of A, B, and C phases. . A, B, and C of the receptacle 84 indicate power supply side A phase, B phase, and C phase terminals. HA, HB, and HC of the first connection groove and the receptacle 86 refer to the Hall element connection ends of the A phase, B phase, and C phase. VCC is the DC power input terminal, GND is the ground (ground) terminal, and TS is the temperature sensor output terminal.

Referring to FIG. 7, power input terminals of four connection grooves shown on the left side are connected in parallel, and three phase external power sources shown on the right side are connected to them. The power output terminals of the four connection grooves are all tied to a common terminal. The six external electrical signal terminals shown on the right side are connected to six electrical signal terminals of the first connecting groove shown on the left side, respectively.

Referring to Figure 8, the three phase external power source shown on the right is connected to the power input terminal of the first connection groove. The power output terminal of connection 1 is connected to the power input terminal of connection 2, the power output terminal of connection 2 is connected to the power input terminal of connection 3 and the output terminal of connection 3 is 4 The power is connected in series with the power input terminal of. The external electrical signal terminal shown on the right side is connected to the electrical signal terminal of the first connection groove shown on the left side. With this configuration, the connector block shown in Fig. 8 suggests a serial connection.

In the above embodiment, the case in which two or four coil modules have been described as an example. However, the present invention is not limited thereto. It will be understood by those skilled in the art that a linear motor may be provided in which three or more coil modules are connected. 6 to 8, the connector block 32f connecting the four coil modules has been described. However, the present invention is not limited thereto. 1, the connector required for the mover having two coil units is provided with two connection grooves, and the rest of the configuration is the same as above. Those skilled in the art will appreciate that a connection connector block provided with three or five or more connection grooves can also be configured according to the coil block to be used.

According to the present invention, there is provided a linear motor configured such that the coil component is easily separated from the mover. In this configuration, repair and replacement of the coil is easy. This is because the whole mover does not need to be separated from the linear motor. In addition, according to the present invention, since the coil component of the mover is easily disassembled into respective independent unit coil modules, only the desired coil can be easily repaired or replaced. In addition, according to the present invention there is provided a connection device for easily connecting each independent unit coils of the linear motor in series or in parallel.

Although the present invention has been described with reference to the above embodiments, the present invention is not limited thereto. Those skilled in the art will appreciate that modifications and variations can be made without departing from the spirit and scope of the present invention and that such modifications and variations also fall within the present invention.

1 is a perspective view of a linear motor according to an embodiment of the present invention, a part of which is cut away so that the inside is visible;

2 is a cross-sectional view of a mover provided in the linear motor of FIG.

3 is a perspective view illustrating a first coil unit constituting the coil assembly of FIG.

FIG. 4 is a perspective view mainly showing a connection portion of a circuit board used in each coil unit of FIG. 1, wherein (a) is a first circuit board used for the first coil unit, and (b) is used for the second coil unit. Perspective view of a second circuit board

5 is a perspective view showing only one end portion of the moving coil device provided in the linear motor according to another embodiment of the present invention, showing a state in which a connector is mounted.

FIG. 6 is a perspective view showing the connection groove of the connector of FIG. 5. FIG.

FIG. 7 is a circuit diagram of the connector of FIG. 5 and illustrates a circuit for connecting the coil units included in the coil assembly in parallel. FIG.

FIG. 8 is a circuit diagram of the connector of FIG. 5 and illustrates a circuit for connecting the coil units provided in the coil assembly in series. FIG.

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

10: linear motor 20: stator

27: permanent magnet 30: mover

31 moving body 32 coil assembly

36: coupling groove 37: fixed end

39: coil module 80: connector block

301: coupling bolt 303: fixing bolt

381: engaging portion 392: coil unit

393: circuit board 395: connection

396: connection terminal 500: winding coil

Claims (9)

delete delete delete A linear motor including a stator having a magnet and a mover having a plurality of winding coils, wherein the coil is driven by the magnet, The mover has a moving body, and a plurality of coil modules detachably coupled to the moving body, each having a plurality of winding coils, Each coil module includes a coil unit in which a plurality of flat coil and annular winding coils are arranged in a transverse direction, The coil unit has a connection exposed to the outside Linear motor. The linear motor according to claim 4, further comprising a connector device in which a circuit for connecting between the connection portions of the circuit boards provided in each coil unit is incorporated. The linear motor of claim 5, wherein the connection part protrudes, the connection part is provided with a connection terminal, and the connector device is provided with a groove into which the connection part is fitted, and a terminal connected to the connection terminal of the connection part is provided in the groove. 6. The linear motor of claim 5, wherein the connector device is configured such that an internal circuit connects in parallel between the coil units. 6. The linear motor of claim 5, wherein the connector device is configured such that an internal circuit connects in series between the coil units. delete