JP2002136096A - Armature coil connection device for linear motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an armature coil connection device of a linear motor, which firstly reduces connection man-hours and space required for the coil connection and improves the rigidity of the armature by making the armature weight per unit volume small and secondly makes resin impregnation to the armature coil easy and the manufacturing cost low. SOLUTION: In the linear motor which has a number of integral multiples of the phase number of coil blocks 531, the armature connection device for the linear motor has on the surface of each core block 531 coil-to-coil connection boards 8a, 8b and a neutral point plate 10 which are respectively connected to either of two leads of a coil winding start 3a and a coil winding finish 3b which are respectively drawn from the armature coil of each phase in order to make it the jumper lead handling side or the neutral point handling side, and a power feeder side connecting board 5 to which the other lead is connected in order to make it the power feeding side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer system for FA equipment, for example, a suction-force canceling linear motor used for table feed of a machine tool, and more particularly to an armature sequentially connected by a plurality of core blocks. The present invention relates to an armature coil connection device for a linear motor that connects an armature coil mounted on a core via a connection board.

[0002]

2. Description of the Related Art Conventionally, there has been proposed a linear motor of a suction force canceling type used for a transport system of an FA device, for example, a table feed of a machine tool. FIG. 5 is a front sectional view of a linear motor common to the present invention and the prior art, viewed from the thrust direction. In the drawings, a moving coil type linear motor is exemplified. In the figure, 501 is a linear motor,
506 is a plate-shaped field yoke, 505 is a plurality of permanent magnets constituting field poles having different polarities alternately on the field yoke 506, 50
An armature 2 opposes the magnetic pole surface of the permanent magnet 505 via an air gap, and an armature core 503 is formed by stacking a plurality of electromagnetic steel sheets one above the other. The armature core 503 is attached to the armature mounting plate 504 by armature mounting bolts 532. It is fixed. 507 is an armature coil wound around a slot located between the teeth of the armature core.
In the linear motor 501 having such a configuration, the field yoke 506 having field poles is used as a mover, and the armature 502 is used as a stator, and the armature 502 is placed in the longitudinal direction of the field yoke 506 (perpendicular to the paper). It is designed to run toward. Hereinafter, the first related art and the second related art will be described in detail.

[First Prior Art] FIG. 6 shows a first prior art, in which an armature extending in the stroke length direction as viewed from the lower surface side of a linear motor armature along the line CC 'of FIG. FIG. 7 is a perspective view of a conductor connecting plate for connecting coil conductors. As shown in FIG. 6, the armature core 503 includes a plurality of core blocks 531 formed by punching and stacking an electromagnetic steel sheet in a substantially I-shape.
Fitted and connected. Each core block 531 has an integral multiple of the number of phases (9 in this example for 3 phases), and extends along the yoke on the lower surface side of the armature core 503 as shown in FIG. An insulated wiring board made of, for example, a glass epoxy resin material is provided in a space S on the inner peripheral side of the coil end portion of the armature coil 507. In FIG. 6, 51
Reference numeral 3 denotes a wiring board. The wiring board 513 has first armature coils 507a to 507i serving as crossover wires between in-phase coils.
The conductor connection plates 509a to 509c, 510a to 510c and a second conductor connection plate 514 which is a neutral point of the interphase coil are provided. Note that the wiring board 513, the first conductor connection plates 509a to 509c, 510a to
For fixing the 510c and the second conductor connection plate 514, for example, a rail groove (not shown) is provided in the wiring board 513 shown in FIG. 6, and the first and second conductor connection plates are inserted into rail grooves (not shown). As well as the wiring board 51
In FIG. 3, a power supply (not shown) is conducted between the coils of each phase.

Here, the configuration of the connection for connecting these coil conductors will be described with reference to FIG. Each phase armature coil 507a
507i are connected in the order of OPEN, CLOSE, OPEN... Of the U-phase armature coils 507a to 507c, the winding start sides of the coil conductors 507b and 507c are connected by a first conductor connection plate 509a that is a crossover, and the winding end side of the coil conductors 507a and 507b is a crossover. They are connected by a first conductor connection plate 510a. Similarly, in the V-phase armature coils 507d to 507f,
The first is a crossover between the winding start sides of the coil conductors 507e and 507f.
The conductors are connected by a conductor connection plate 509b, and the winding ends of the coil conductors 507d and 507e are connected by a first conductor connection plate 510b serving as a crossover. The same is true for the W phase. Further, lead wires 508a, 508d, and 508g connected to a power source (not shown) are coil conductors.
507a, 507d, and 507g are connected to the winding start side. Of the armature coils of each phase, the winding end sides of the coil conductors 507c, 507f, and 507i are connected by a second conductor connection plate 514 serving as a neutral point. ing.

[Second Prior Art] Further, as a second prior art, there have been carried out various methods of connecting armatures of a linear motor as shown in FIG. FIG. 8 shows a second prior art,
FIG. 4 is a plan view of a part of a connection board between coils provided on an armature of a linear motor, with a part cut away. As shown in FIG. 8, when connecting the lead wires 3a1, 3b1, 3a2, 3b2 coming out of each coil,
In order to connect the left and right coils 2, a large inter-coil connection board 66 having an unnecessary space was required.

[0006]

However, in the first prior art, when the generated magnetic force and the number of poles of the linear motor armature increase, the total number of armatures also increases. Since the number of conductors also increases, the number of steps required for coil connection processing, the shape of the conductor connection board required for coil connection becomes complicated and the space becomes large, and there is a problem that the weight per unit volume of the armature of the linear motor increases. . Further, in the second prior art, since the armature coils are arranged on both sides of the teeth of the core block, the board shape of the coil-to-coil connection board for connecting the armature coils becomes large, There is also a problem that the partition plate becomes insufficiently filled with resin, which is disadvantageous in terms of manufacturing cost and resin mold. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a first object of the present invention is to reduce the number of coil connection processing steps and the space required for coil connection, and reduce the weight per unit volume of the armature. A second object is to provide an armature connecting device for a linear motor capable of improving the rigidity of the armature by improving the rigidity of the armature. Another object of the present invention is to provide an armature coil connection device for a linear motor.

[0007]

In order to achieve the above object, the present invention is directed to a field yoke in which permanent magnets having alternately different polarities are arranged side by side, and a field yoke extending along the longitudinal direction of the field yoke. And an armature disposed to face the magnet row of the permanent magnets via a magnetic gap. The armature sequentially fits a plurality of core blocks formed by vertically laminating substantially I-shaped electromagnetic steel sheets. An armature core connected to the core block and an armature coil wound around each of the core blocks,
One of the field yoke and the armature as a stator, the other as a mover, in a linear motor such that the field yoke and the armature run relatively.
Each of the core blocks has an integral multiple of the number of phases.On the surface of the core block, there are two winding start ends and end windings of the coils drawn from the armature coils of each phase. A connection board between coils and a neutral point plate for connecting one of the lead wires so as to be a crossover processing side and a neutral point processing side, and a power supply side connection board for connecting the other so as to be a power supply side. An armature coil connection device for a linear motor, comprising: Thus, according to the first aspect of the present invention, since the above-described configuration is employed, in the armature coil connection processing of the linear motor having the structure using the plurality of divided core blocks, the connection processing man-hour is significantly reduced as compared with the related art. It is possible to reduce the size and the size of the processing section. As a result, it is possible to reduce the height of the linear motor, to reduce the space for storing the linear motor, and to reduce the center of gravity.

According to a second aspect of the present invention, there is provided a field yoke in which permanent magnets having different polarities are arranged side by side;
An armature is disposed along the longitudinal direction of the field yoke and facing the magnet row of the permanent magnet via a magnetic gap,
The armature is composed of an armature core in which a plurality of core blocks formed by vertically laminating substantially I-shaped electromagnetic steel sheets are sequentially fitted and connected, and armature coils wound on the left and right sides of the respective core blocks. A linear motor, wherein one of the field yoke and the armature is used as a stator and the other is used as a movable element, and the field yoke and the armature run relatively to each other. The child coil is provided with a printed wiring-to-coil connection board for arranging the coil winding start and winding end in the same direction in the traveling direction of the required number of motors and connecting each of the lead wires of each of the coils. Wherein the front side and the back side of the armature coil are applied to the connection of the upper surface on the outer side of the armature coil.

According to a third aspect of the present invention, there is provided a field yoke in which permanent magnets having different polarities are arranged side by side, and a magnet row of the permanent magnets is arranged along a longitudinal direction of the field yoke. Armatures disposed opposite each other with an air gap therebetween, wherein the armature is an armature core in which a plurality of core blocks formed by vertically laminating substantially I-shaped electromagnetic steel plates are sequentially fitted and connected; The armature coils are wound around the left and right sides of a core block. One of the field yoke and the armature is used as a stator, and the other is used as a mover. In the linear motor, the armature coils are arranged such that the winding start and end of the armature coil are arranged in the same direction in the traveling direction of the required number of motors, and each of the lead wires of each coil is connected. An armature coil connection device for a linear motor, comprising: a wire-connected coil connection board, wherein the front side and the front side of the coil connection board are applied to the connection of the upper surface on the outer side of the armature coil. is there. Thus, according to the second and third aspects of the present invention, since the above-described configuration is employed, only one substrate having a width as small as a coil shape is required, and a cost reduction effect can be expected. Further, there is also a remarkable effect that the resin is easily filled even when molding.

According to a fourth aspect of the present invention, there is provided the armature coil connection device for a linear motor according to any one of the first to fourth aspects, wherein electrical insulation is provided between the printed wiring boards. It is characterized by penetrating scissors with glass epoxy resin to ensure its properties.

According to a fifth aspect of the present invention, in the armature coil connection device for a linear motor according to any one of the first to fourth aspects, the armature comprises the armature core and the armature. It is characterized by being molded with resin so as to cover the coil and the wiring board.

[0012]

Embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same reference numerals are the same or equivalent members. [First Embodiment] FIG.
FIG. 1 is a diagram showing an armature coil connection device for a linear motor according to a first embodiment of the present invention, and is a plan view of the armature as viewed from above. Armature core consists of multiple core blocks 531
Are sequentially fitted, and an armature coil 507 is wound therearound. From this core block 531, start winding
There are two lead wires 3a and end 3b. In this example, one of the winding start 3a and the winding end 3b is set to the crossover processing or neutral point processing side, and the other is set to the power supply side. Then, one end of each of these lead wires is connected to the power supply side connection board 5 disposed between the two armature coil groups which are symmetrical with each other, and the connection between the coils is connected to the upper part of the armature coil end on the opposite side to the fixed side. In the inter-coil connection board 6 arranged in
As shown in FIGS. 1 and 2, the connection is fixed by a connection method such as soldering. Then, lead wires of each phase (U1, U2, U3
, V1, V2, V3, W1, W2, W3) are connected in parallel to form a 3Y-connected three-phase winding.

FIG. 2 is an enlarged view of the inter-coil connection substrate of FIG. In this example, nine core blocks 531
This is an example of a linear motor configuration in which eight permanent magnets (not shown) face each other. Therefore, the arrangement of the phase coils is such that the U-phase coils 3
, Three V-phase coils, and three W-phase coils. In each phase, for example, for a U-phase coil, core blocks around which a first coil, a second coil, and a third coil are wound are arranged in order from the left, and OPEN-CL is connected in series.
Because of the OSE-OPEN, there is an inter-coil connecting plate 8a on the surface of the core block that connects the winding end side of the first coil and the second coil, and between the coils connecting the winding start side of the second coil and the third coil. A connection plate 8b is provided. Further, the winding end side of the third coil is connected to the neutral point plate 10. Then, the start of winding of the first coil is connected to a predetermined terminal of the power supply side connection board 5. This configuration is the same for the V-phase coil and the W-phase coil. By doing so, 3
The phase windings will be Y-connected. In addition, in order to ensure electrical insulation, glass epoxy resin is inserted between these connection plates, or the entire connection is molded with the resin except for a joint portion with the coil end.

[Second Embodiment] FIG. 3 is a view showing an armature coil connection device for a linear motor according to a second embodiment of the present invention. FIG. An armature coil 507 is wound around the core block 531. From the core block 531, the lead wire winding start 3a and winding end 3b of the armature coil 507 are exposed. And so on. The front surface 61 is provided on the printed wiring connection board 6 between the coils.
a and a back surface 61b, each surface being mounted on the top surface. Incidentally, 611, 612, 613,..., 61n are printed wirings on the front surface 61a [the back surface 61b also has a different type of printed wiring from the front surface 61a, but the symbols are omitted because they are complicated]. As described above, one type of substrate (there is one type of printed wiring on each side)
By effectively using the back side, the substrate itself becomes compact, and it becomes an inexpensive component. Also, when performing armature molding, the resin can be smoothly filled.

[Third Embodiment] FIG. 4 is a view showing an armature coil connection device for a linear motor according to a third embodiment of the present invention. FIG. This is the beginning of the armature coil lead wire winding 3a
By arranging 1 and 3b1 at the center only on one side, the same effect as described above can be expected by using only one side of the substrate. Furthermore, this is because the lead wire winding start 3a1 and 3b1 of the armature coil are on the same side (the upper side in FIG. 4) on both the left and right sides, and when the moving magnetic field is formed,
This is a mode in which the arrangement of the armature coils is considered so that the directions of the magnetic fields generated on the left and right of 531 are the same.

[0016]

As described above, according to the first aspect of the present invention, in the lead connection processing of a linear motor using a plurality of divided core blocks, the number of connection processing steps is significantly reduced as compared with the related art. In addition, since the dimensions of the processing section can be reduced, the linear motor height is reduced, the linear motor storage space is reduced, and the lower center of gravity increases rigidity, which is advantageous in terms of control. Play.
According to the second and third aspects of the present invention, only one substrate having a width as short as a coil shape is required, and a cost reduction effect can be expected. Further, there is also a remarkable effect that the resin is easily filled even when molding.

[Brief description of the drawings]

FIG. 1 is a diagram showing an armature coil connection device for a linear motor according to a first embodiment of the present invention, and is a plan view of the armature as viewed from above.

FIG. 2 is an enlarged view of an inter-coil connection board of FIG. 1;

FIG. 3 is a diagram showing an armature coil connection device for a linear motor according to a second embodiment of the present invention, and is a plan view with a part cut away when the armature is viewed from above.

FIG. 4 is a view showing an armature coil connection device for a linear motor according to a third embodiment of the present invention, and is a plan view with a part cut away when the armature is viewed from above.

FIG. 5 is a front sectional view of a linear motor common to the present invention and the prior art, viewed from a thrust direction.

FIG. 6 is a plan view of the armature extending in the stroke length direction as viewed from the lower surface side of the linear motor armature along the line CC ′ in FIG. 5 according to the first prior art;

FIG. 7 is a perspective view of a conductor connection plate for connecting coil conductors.

FIG. 8 is a plan view of a second prior art, in which a part of an inter-coil connection board provided on an armature of a linear motor is cut away.

[Explanation of symbols]

 3a, 3a1,3a2,3a3 Winding start 3a 'Neutral point processing side 3b.3b1,3b2,3b3 Winding end 3b' Lead wire processing side 5 Power supply side connection board 6 Coil connection board 61a Substrate surface side 611,612,612, ..., 61n Printed wiring on board 7 Lead wire 8, 8a.8b Connection plate between coils 9 Armature fixing bolt 10 Neutral point plate 501 Linear motor 502 Armature 503 Armature core 504 Armature mounting plate 505 Permanent magnet 506 Field yoke 507 Electric machine Child coil 511 Resin 512 Refrigerant passage 531 Core block 532 Armature fixing bolt S Space

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takashi Yamada 2-1 Kurosaki Castle Stone, Yawatanishi-ku, Kitakyushu City, Fukuoka Prefecture Inside Yaskawa Electric Co., Ltd. (72) Inventor Masahiko Tanabe 2-1 Kurosaki Castle Stone, Yawatanishi-ku, Kitakyushu City, Fukuoka Prefecture F-term (reference) in Yaskawa Electric Co., Ltd. 5H604 AA05 AA08 BB11 CC01 CC02 CC05 CC18 DA15 DB02 PE06 QB04 QB14 5H641 BB06 BB18 BB19 GG02 GG03 GG04 GG08 GG11 GG12 GG15 HH09 HH12 HH13

Claims (5)

[Claims] 1. A field yoke in which permanent magnets having different polarities are alternately arranged side by side, and an electric machine arranged in opposition to a magnet row of the permanent magnets along a longitudinal direction of the field yoke via a magnetic gap. An armature, wherein a plurality of core blocks formed by vertically laminating substantially I-shaped electromagnetic steel sheets are sequentially fitted and connected, and an armature wound around each of the core blocks. A linear motor configured of a coil, wherein one of the field yoke and the armature is a stator, and the other is a movable element, and the field yoke and the armature relatively travel. Each of the core blocks has an integral multiple of the number of phases.On the surface of the core block, there are two coil windings which are drawn from the armature coil of each phase and have a coil winding end. Lead A power supply-side connection board that connects one of them as a crossover processing side and a neutral point processing side and an inter-coil connection board and a neutral point plate, respectively, and the other is connected as a power supply side. An armature coil connection device for a linear motor. 2. A field yoke in which permanent magnets having alternately different polarities are arranged side by side, and an electric machine which is arranged along a longitudinal direction of the field yoke with a magnet row of the permanent magnets via a magnetic gap. An armature, wherein a plurality of core blocks formed by laminating substantially I-shaped electromagnetic steel sheets are sequentially fitted and connected to each other; A linear element that is configured such that one of the field yoke and the armature is a stator and the other is a movable element, and the field yoke and the armature run relatively. In the motor, the armature coils are arranged in the same direction so that the winding start and end of the coil are arranged in a required number of motor traveling directions, and printed wiring connections for connecting each of the lead wires of each coil. A plate, linear motor armature coil connection apparatus characterized by applying the front and rear side of the coil between the connection substrate to the connection of the upper surface of the external side of the armature coil. 3. A field yoke in which permanent magnets having alternately different polarities are arranged side by side, and an electric machine which is arranged along a longitudinal direction of the field yoke with a magnet row of the permanent magnets via a magnetic gap. An armature, wherein a plurality of core blocks formed by laminating substantially I-shaped electromagnetic steel sheets are sequentially fitted and connected to each other; A linear element that is configured such that one of the field yoke and the armature is a stator and the other is a movable element, and the field yoke and the armature run relatively. In the motor, the armature coils are arranged in the same direction so that the winding start and end of the coil are arranged in a required number of motor traveling directions, and printed wiring connections for connecting each of the lead wires of each coil. A plate, linear motor armature coil connection apparatus characterized by applying the surface side and the surface side of the coil between the connection substrate to the connection of the upper surface of the external side of the armature coil. 4. The linear device according to claim 1, wherein a glass epoxy resin for securing electrical insulation is interposed between the printed wiring boards. Armature coil connection device for motor. 5. The armature according to claim 1, wherein the armature is molded with resin so as to cover the armature core, the armature coil and the respective wiring boards. 2. The armature coil connection device for a linear motor according to item 1.