JP5499349B2 - Winding structure and electrical equipment using the same - Google Patents

Description

The present invention relates to a winding structure used for a winding of an electric device such as a rotating device such as an electric motor and a generator, or a transformer, and an electric device using the same.

In a rotating device such as an electric motor or a generator, a winding is wound around a rotor or a stator, and in an electric device such as a transformer, a winding is used as a primary and secondary coil. . Such a winding is manufactured by winding a wire such as an electric wire around a bobbin or an iron core shaft. As a method of winding the wire around the shaft body, the shaft rotation method that winds the wire around the shaft body while rotating the shaft body and the flyer method that winds the wire rod around the shaft body while fixing the shaft body are put into practical use. Has been.

In the shaft-around method and the flyer method, when the wire is lap-wound, it is created so as to start winding from the inner peripheral side of the winding and to finish winding on the outer peripheral side while sequentially winding on the outer periphery. The created winding requires a space for drawing the wire material at the beginning of winding outward from the inner circumference side. Therefore, in order to eliminate this wasted space and improve the space factor of the winding, A winding method has been proposed. For example, in Patent Document 1, the insulation-coated electric wire having a rectangular cross section is formed as a set of two one-layered windings starting from the inside and the windings connected to each other are used as the basic coil. A winding in which a plurality of wires are stacked is described. Moreover, in patent document 2, after making the intermediate part of the longitudinal direction of a flat conducting wire cross | intersect a teeth part iron core, the coil | winding by winding up to the both ends to the opposite direction to a flat conducting wire was described. Yes. Moreover, in patent document 3, a conducting wire is made to project for a predetermined length, a root is fixed, the projecting part of a conducting wire is bent in a right angle direction with a pressing tool, and it is wound with an alpha winding in a spiral shape so that a space part is formed in the center. It describes the point of manufacturing a coil in which a plurality of spiral bodies are arranged in the horizontal direction.

JP 2004-72824 A JP 2006-109659 A JP 2009-71939 A

In Patent Documents 1 and 2 described above, the winding is configured by arranging a plurality of two layers that are overlapped as a unit. However, since the winding is performed by winding the wire, the spring of the wound wire is performed. A gap is generated between the wires by the action of the back, and the space factor is reduced. Further, when a plurality of unit two layers are arranged, it is necessary to connect the terminal portions of the wire drawn to the outer peripheral side by soldering or the like between adjacent two layers. Therefore, a space for the connection portion is required on the outer peripheral side of the winding. Further, there is a demerit that an insulation process is required due to the presence of the connection portion, and the winding resistance at the connection portion is increased.

In Patent Document 3, since a spiral body is formed by bending a conducting wire, a gap is formed between adjacent turns in the rounded portion formed at the corner of the spiral body, and such a winding is fixed. When used for a child or a rotor, the size of the stator or the rotor is increased, and there is a difficulty in miniaturization. Further, when the conductor is bent, the insulating coating formed on the surface of the conductor at the bent portion or the pressed portion may be damaged, and insulation may not be ensured.

The present invention has been made in view of such problems of the prior art, and an object thereof is to provide a winding structure that improves the space factor of the winding and does not increase the winding resistance due to the connection. .

In the winding structure according to the present invention, a plurality of wound layer portions formed by partially overlapping one continuous wire deformed so as to circulate in a spiral shape are adhered in the thickness direction. The winding layer part is formed so that the curvature of the wire is gradually reduced from the inner circumference side toward the outer circumference side in the curved portion, and is overlapped so that the wire is in close contact with the entire circumference. Yes. Further, the winding layer portion other than both end portions is connected to the winding layer portion adjacent to one side and the wire layer continuously on the outer peripheral side and the winding layer portion adjacent to the other side and the inner periphery. The wires are continuously connected on the side. Furthermore, at least one of the winding layer portions is different from the other winding layer portions in the number of turns of the wire. Furthermore, the wire has a rectangular cross section. Furthermore, the said wire is deform | transformed so that the said curve part and a linear part may be formed alternately, and it may wrap around spirally.

An electric apparatus according to the present invention includes the above-described winding structure. Furthermore, a plurality of types of winding structures having different numbers of turns of at least one of the winding layer portions are provided. Furthermore, the number of the winding layer portions of at least one of the winding structures is different. Further, a plurality of winding structures are formed by one continuous wire. Furthermore, a crossover wire that connects the plurality of winding structures is formed by the wire, and the crossover wires are connected on the inner diameter side or the outer diameter side of the plurality of winding structures arranged in the circumferential direction. Yes. Furthermore, the connecting wire connecting the plurality of winding structures is formed by the wire material, and the connecting wire connects the inner diameter side and the outer diameter side of the plurality of winding structures arranged in the circumferential direction. Wiring is performed along the winding structure so as to intersect the winding structure.

Since the present invention has the above-described configuration, the space factor of the winding is improved and the wire is composed of one wire, so that an increase in winding resistance accompanying the connecting portion of the wire occurs. There is no.

It is an external appearance perspective view regarding the winding structure which concerns on this invention. It is the front view, side view, and bottom view of a winding structure. It is a perspective view which shows the shape of the wire which comprises a coil | winding structure. It is the schematic diagram which looked at the wire deform | transformed helically shown in FIG. 3 from the side surface. It is explanatory drawing regarding the case where the winding structure of this embodiment is inserted in a support body, and the case where a wire rod is wound around the same support body by lap winding to form a winding structure. It is a schematic block diagram regarding the shaping | molding apparatus which deform | transforms a wire rod helically. It is explanatory drawing which shows the shape regarding a winding structure. It is a schematic block diagram which used the coil | winding structure for the rotating equipment. It is explanatory drawing regarding the connection of the coil of the same phase of the stator shown in FIG. It is explanatory drawing regarding the connection of the coil of the same phase of the stator shown in FIG. It is a schematic block diagram which used another coil | winding structure for the rotating equipment.

Hereinafter, embodiments according to the present invention will be described in detail. The embodiments described below are preferable specific examples for carrying out the present invention, and thus various technical limitations are made. However, the present invention is particularly limited in the following description. Unless otherwise specified, the present invention is not limited to these forms.

FIG. 1 is an external perspective view of a winding structure according to the present invention, and FIG. 2 is a front view (FIG. 2A), a side view (FIG. 2B), and a bottom view (FIG. 2) of the winding structure. 2 (c)). The winding structure 1 is formed by arranging a plurality of winding layer portions 3 in which a single continuous wire 2 deformed so as to circulate in a spiral shape is partially spirally stacked and in close contact with each other in the thickness direction. It is configured. In this example, the winding structure has a space formed therein, and in the case of a rotating device, it is inserted into a support such as a tooth. In the case of a transformer, it is inserted into an iron core. The wound layer portion 3 is configured by superimposing and closely contacting the wire 2 in a spiral shape, and is continuously connected to the adjacent wound layer portion 3 by the wire 2 on the inner peripheral side or the outer peripheral side. And the edge part of the wire 2 is arrange | positioned at the outer peripheral side or inner peripheral side of the winding layer part 3 of both ends. Here, the thickness direction of the wound layer portion 3 is a direction orthogonal to the laminated surface in contact with both sides of the spirally wound wire 2, and in this example, the long side direction of the cross section of the wire 2 having a rectangular cross section. The TT direction shown in FIG.

The wire 2 is made of a conductive material such as copper, which has been used in conventional windings, as a wire, and a coating made of an insulating material such as enamel is formed around it. Note that an insulating tape may be wound around the wire 2 in place of the insulating coating to insulate it. Examples of the shape of the wire 2 include a round wire having a circular cross section and a rectangular wire having a rectangular shape, but other shapes can be used and are not particularly limited. In the present embodiment, a wire having a flat cross-sectional shape is used. Since the cross-sectional shape of a rectangular wire is rectangular, the direction along the short side of the rectangle is referred to as the short side direction when the deformation direction of the wire is indicated, and the direction along the long side of the rectangle is described as the long side direction. . Moreover, the thing of various thickness can also be used about the thickness of the wire 2, and if it is the thickness which can be deform | transformed by press so that it may mention later, it can be used as a wire.

As shown in FIG. 2A, the wound layer portion 3 is configured by deforming the wire 2 having a rectangular cross section so as to be bent at right angles to the short side direction of the cross section and superimposing them in a spiral shape. Here, the “spiral shape” means a state in which a single wire 2 is laminated so as to overlap while rotating. On the other hand, “spiral” refers to a state in which one wire 2 is displaced in the thickness direction of the wound layer portion 3 without being laminated while rotating, as will be described later. In this example, the wire 2 is curved in the short side direction of the cross section, but the wound layer 3 can also be configured by curving the wire 2 in the long side direction of the cross section and overlapping it in a spiral shape. .

In this example, the wound layer portion 3 is composed of four rounded portions, and each rounded portion is formed by bending the wire 2 in a right-angle direction at four locations, and the corners are rounded when viewed from the thickness direction of the wound layer portion 3. It is formed in a rectangular shape. The four corners of each circumference part are formed in a curved part 3a having a predetermined curvature, the four sides are formed in a straight line, and one pair of opposing sides is a long side part having a long length. 3b, the other pair is a short side portion 3c having a short length. Then, the curved portion 3a that is a corner is formed so that the curvature decreases sequentially from the inner peripheral side to the outer peripheral portion, and the wire 2 is overlapped so as to be in close contact with the entire circumference. ing. In order to bring the adjacent wire portions 2 of the surrounding portions into close contact with each other, the curvature radius corresponding to the curvature of the curved portion 3a of the surrounding portion adjacent to the outer peripheral side corresponds to the curvature of the curved portion 3a of the peripheral portion adjacent to the inner peripheral side. If the value is set to a value obtained by adding the length in the short side direction of the cross section of the wire 2 to the radius of curvature to be formed, the curved portions can be formed in close contact with each other. Further, the wire 2 is continuously connected to the adjacent wound layer portion 3 in the inner peripheral side connecting portion 3d and the outer peripheral side connecting portion 3e.

The winding layer portion 3 includes a winding layer portion 30 shown in FIG. 2 (a) and a winding layer portion 31 shown in FIG. 2 (d). The winding structure 1 has a winding structure as shown in FIG. 2 (b). The layer portions 30 and 31 are alternately arranged. The winding layer portion 30 spirally overlaps the wire 2 from the outer peripheral side to the inner peripheral side, and moves from the inner peripheral side to the winding layer portion 31 by continuing the wire 2 at the connecting portion 3d. The wire 2 is overlapped in a spiral shape from the peripheral side to the outer peripheral side, and the wire 2 is continued at the connecting portion 3e from the outer peripheral side to move to the next wound layer portion 30.

The wound layer portion 30 and the wound layer portion 31 are in contact with each other so that the long side portion 3b and the short side portion 3c abut each other at the side ends, and the mutual wire 2 does not enter and is in a stable state. Closely arranged. Further, in the wound layer portion 30 and the wound layer portion 31, the curved portions 3a at both ends of the short side portion 3c (the upper side in FIGS. 2A and 2D) where the connecting portions are not formed are formed in the same shape. In close contact with each other, they are in close contact with each other. On the other hand, the curved portions 3a at both ends of the short side portion 3c (the lower side in FIGS. 2 (a) and 2 (d)) where the connecting portion is arranged are connected to the inner peripheral side of the winding layer portion 30d. Is arranged so that the curvilinear layer portion 31 and the curved portion are displaced from each other, but the short side portions 3c are in contact with each other so that the mutual wire enters. It is closely arranged in a stable state.

In this example, the winding layers 30 and 31 are set to the same number of turns. However, since the number of turns can be set for each, the number of turns can be increased or decreased with respect to the adjacent winding layers. It becomes possible. And when increasing / decreasing the number of turns, by arranging the increase / decrease of the number of turns on the outer peripheral side or on the inner peripheral side, the adjacent wound layer parts come into contact with each other so that the wire 2 abuts against each other in the intermediate part. Can be maintained in close contact with each other, and a winding structure in which the wound layer portions are placed in close contact with each other in a stable state can be obtained.

As described above, the wire rods of the respective wound layer portions can be arranged in close contact with each other in a spiral shape, and can also be arranged in close contact between the wound layer portions, so that the space factor of the winding structure can be improved. In addition, by arranging the connecting portions on one short side portion on the inner peripheral side and the outer peripheral side, each winding layer portion is formed by one continuous wire without affecting the close contact arrangement of the long side portion and the short side portion. Can be linked.

FIG. 3 is a perspective view showing the shape of the wire 2 constituting the winding structure 1. The wire 2 is deformed so as to circulate spirally, and is developed so as to be displaced in the same direction as the thickness direction TT of the wound layer portion 3. In this example, one continuous wire 2 is formed by forming a wound layer portion 3 into a curved portion 3a that is curved in a perpendicular direction, a linear portion that corresponds to the long side portion 3b, a curved portion 3a that is curved in a perpendicular direction, and a short portion. It is possible to form a spiral shape in the thickness direction of the wound layer portion 3 by repeatedly forming a linear portion corresponding to the side portion 3c. The curved portion 3a is curved so that the curvature of the curved portion corresponding to the inner circumferential portion is larger than the curvature of the curved portion corresponding to the adjacent outer circumferential portion.

FIG. 4 is a schematic view of the spirally deformed wire 2 shown in FIG. 3 as viewed from the side. The straight line portion 3b is drawn in a zigzag broken line shape centering on the thickness direction TT of the wound layer portion 3, and the bent portions on both sides are the straight line portions corresponding to the curved portion 3a and the short side portion 3c. It comes to correspond. The wire 2 is helically deformed by repeating two continuous deformation regions F1 and F2. The deformation | transformation area | region F1 respond | corresponds to the winding layer part 30, and has deform | transformed so that it may wrap around spirally toward the inner side from the outer side. And in the deformation | transformation area | region F1, as mentioned above, it curves and forms so that the curvature of the curve part 3a may become large as it goes inside. Further, the deformation area F2 following the deformation area F1 corresponds to the wound layer portion 31, and is deformed so as to circulate spirally from the inside toward the outside. And in the deformation | transformation area | region F2, as mentioned above, it curves and forms so that the curvature of the curve part 3a may become small as it goes outside.

And in the part which transfers to the deformation | transformation area | region F2 from the deformation | transformation area | region F1, the deformation | transformation location f2 on the deformation | transformation area | region F1 side is formed so that a linear part and a curve part may overlap inside, but the deformation | transformation location f3 on the deformation | transformation area | region F2 side Since it is formed in the same shape so as to abut against the deformed portion f <b> 1 of the deformation region F <b> 1, the wound layer portion 31 can be formed adjacent to the wound layer portion 30. Moreover, in the part which transfers to the deformation | transformation area | region F1 from the deformation | transformation area | region F2, the deformation | transformation location f5 by the side of the deformation | transformation area F2 is formed so that it may overlap outside, but the deformation | transformation location f6 by the side of the deformation | transformation area | region F1 is a deformation | transformation location of the deformation | transformation area F2. Since it is formed in a shape that abuts against f4, the wound layer portion 30 can be formed adjacent to the wound layer portion 31.

In addition, the deformation regions F1 and F2 can independently increase or decrease the number of turns, so that the number of turns of each wound layer portion can be set as appropriate. For example, the number of turns of the wound layer portion can be increased sequentially, or the number of turns can be increased only for some of the wound layer portions. In addition, if the circumference of all winding layers is set to the same length except for the connecting part on the inner circumference side, the winding structure can be easily attached to a support such as a tooth and supported in a stable state. Will come to be.

As described above, the winding portion of the wound layer portion 3 is spirally overlapped with one continuous wire 2, the curved portion and the straight portion of the wire 2 are closely attached over the entire circumference, and the wound layer portions are closely attached to each other. Since they are arranged, a winding structure with a high space factor can be obtained. For example, FIG. 5 shows a case where the winding structure 1 of the present embodiment is inserted into a rectangular support S such as a tooth used in a rotating device (FIG. 5A), and a wire rod is stacked on the same support S. The case where the winding structure 100 is formed by winding is shown (FIG. 5B). In the case of the winding structure 100 in which the wire is wound around the support S, the wire is swelled by the spring back after being wound and becomes an elliptical shape. On the other hand, in the winding structure 1 of the present embodiment, the winding structure is configured by using a wire deformed in a spiral shape so that the shape after the spring back matches the outer peripheral surface of the support S. After being molded, deformation due to springback does not occur. Therefore, as shown in FIG. 5B, a winding structure matched with the outer peripheral surface of the support S can be obtained. When compared with the winding structure 100 in which the same number of turns as the number of turns of the winding structure 1 of the present embodiment is compared, in this embodiment, the space factor can be improved by about 10%.

FIG. 6 is a schematic configuration diagram relating to a molding apparatus that deforms the wire 2 into a spiral shape. Fig.6 (a) has shown the shaping | molding apparatus which deform | transforms the wire 2 only to one direction. The forming apparatus is disposed opposite to a conveying mechanism having a driving roller 10 that conveys a wire along the longitudinal direction and a driven roller 11 that is disposed opposite to the driving roller 10, a pressing roller 12 that curves and deforms the wire 2, and the pressing roller 12. There is provided a deformation mechanism having the fulcrum roller 13 and the pressing roller 14 arranged on the upstream side in the transport direction of the fulcrum roller 13. The wire 2 sandwiched between the drive roller 10 and the driven roller 11 of the transport mechanism is driven out of a supply mechanism (not shown) by rotating the drive roller 10 and shaped so as to be linear in the longitudinal direction. While being transported.

The conveyed wire 2 is conveyed so as to pass between the pressing roller 12 and the fulcrum roller 13 while being in contact with the pressing roller 14 of the deformation mechanism. The pushing roller 12, the fulcrum roller 13, and the pressing roller 14 are all rotatably supported by a shaft, and the pushing roller 12 is controlled to move toward and away from the fulcrum roller 13 by a moving mechanism (not shown) and pushed in. I do. When the pushing roller 12 moves close to the downstream side in the conveyance direction of the wire 2 of the fulcrum roller 13 and moves in a direction intersecting the conveyance path of the wire 2, the wire 2 passes between the pushing roller 12 and the fulcrum roller 13. At this time, the sheet is forcibly pushed in the pushing direction and is conveyed while being deformed in a curved shape. When the wire 2 is bent and deformed, the wire 2 is pressed by the pressing roller 14 so as not to bend, so that the wire 2 can be accurately deformed. And a guide member is provided along the path | route along which the wire 2 is curved and deform | transformed, and it makes it deform | transform helically along the wire 2 along a guide member.

The curvature of the wire 2 in the case of bending deformation is set by the conveyance control of the wire 2 in the conveyance mechanism and the movement control of the push roller 12 in the deformation mechanism. As the moving amount of the pushing roller 12 is increased, the wire 2 is deformed along the peripheral surface of the fulcrum roller 13 to increase its curvature. Therefore, it is preferable to set the diameter of the fulcrum roller 13 small and increase the curvature of the peripheral surface. Further, the deformation length to be curved and deformed can be set by adjusting the moving amount and moving time of the pressing roller 12 and the conveying amount of the wire 2. For example, curved portions and straight portions can be alternately formed by controlling movement so that the pushing operation of the pushing roller 12 is intermittently performed. Further, if the pushing roller 12 is maintained at a predetermined pushing position, the wire 2 is curved and deformed in a circular shape.

In FIG. 6 (a), the curved wire 2 is drawn out in a clockwise direction in a direction perpendicular to the paper surface and is supported by a support bar (not shown).

In FIG. 6A, the wire 2 is bent and deformed in the short side direction of the cross section. However, the pushing roller 12 and the fulcrum roller 13 are brought into contact with the wire 2 from the long side direction of the cross section to make the long side direction. Can be curved and deformed. Further, the rotation axis of the pressing roller 12 is inclined with respect to the conveying direction of the wire 2, or the circumferential surface of the pressing roller 12 is inclined in a conical shape, so that the short side direction and the long side direction of the cross section of the wire 2 are increased. It is also possible to bend and deform in an oblique direction inclined from either, and the wire 2 can be bent and deformed in an arbitrary direction. Further, the wire 2 can be curved and deformed in an arbitrary direction by inclining the rotation axis of the fulcrum roller 13 with respect to the conveying direction of the wire 2 or by inclining the peripheral surface of the fulcrum roller 13 in a conical surface. . Therefore, instead of the guide member used for deforming the wire 2 in a spiral shape, the rotation axis and the peripheral surface of the push roller 12 or the fulcrum roller 13 are appropriately set to deform the wire 2 so as to circulate in a spiral shape. It is also possible.

Further, since the pressing roller 12, the fulcrum roller 13 and the pressing roller 14 are rotatably supported, they do not slide on the surface of the wire 2 when contacting the wire 2, and damage the surface of the wire 2. Without bending. In particular, in the case where an insulating coating is formed on the peripheral surface of the wire 2, if the insulating coating breaks when it is formed, it is necessary to insulate the wire again after forming the winding structure. In the molding apparatus, it is possible to reliably prevent the insulation film from being damaged and to ensure the insulation of the wire rod of the winding structure.

In this embodiment, in order to form a curved portion that is curved and deformed in a perpendicular direction, the curvature of the curved portion is adjusted by adjusting the amount of movement of the push roller 12 and the conveyance amount of the wire 2 as shown in FIG. The wire 2 can be formed so as to be deformed in a spiral shape. First, the first deformation process corresponding to the deformation area F1 is performed. After conveying the wire 2 by the length of the long side portion corresponding to the outermost peripheral side, the wire 2 is pressed by the pushing operation of the pushing roller 12 in the direction intersecting the conveying direction while conveying the wire 2 to shorten the cross section. A curved portion having a predetermined curvature is formed by bending in the side direction. Subsequently, after the wire 2 is conveyed by the length of the short side portion, a curved portion having a predetermined curvature is formed by the pushing operation of the pushing roller 12. In this way, while continuously transporting the wire 2, the deformation process for forming the long side portion-curved portion-short side portion-curved portion is repeatedly performed to deform the wire 2 so as to circulate spirally from the outside to the inside. At the same time, the deformation is performed such that the curvature of the inner curved portion is larger than the curvature of the adjacent outer curved portion, thereby forming the deformation region F1.

After the deformation region F1 is formed, the sheet is subsequently conveyed by a length corresponding to the connecting portion, and then a curved portion is formed by the pressing operation by the pressing roller 12, and the second deformation process corresponding to the deformation region F2 is performed. After the wire 2 is conveyed by the length of the long side portion corresponding to the innermost peripheral side, a curved portion having a predetermined curvature is formed by the pushing operation of the pushing roller 12. Subsequently, after the wire 2 is conveyed by the length of the short side portion, a curved portion having a predetermined curvature is formed by the pushing operation of the pushing roller 12. While carrying the wire 2 in this manner, the deformation process of forming the long side portion-curved portion-short side portion-curved portion is repeated to deform the wire 2 so as to circulate spirally from the inside to the outside. The deformed region F2 is formed by deforming so that the curvature of the outer curved portion is smaller than the curvature of the adjacent inner curved portion. After the deformation region F2 is formed, the sheet is subsequently conveyed by a length corresponding to the connecting portion, and then the curved portion is formed by the pushing operation by the pushing roller 12.

In this way, the wire 2 can be deformed in a spiral shape by alternately performing the first deformation process and the second deformation process described above while continuously conveying the wire 2, and the molding can be performed efficiently. Then, the deformed portions of the first deforming step and the second deforming step are spirally overlapped on the formed wire 2 to form a plurality of wound layers by closely contacting the wires 2, and the wound layer A winding structure is manufactured by closely contacting each other.

FIG.6 (b) is a schematic block diagram regarding the modification of a shaping | molding apparatus. In this example, a molding apparatus that deforms the wire 2 in two directions is shown. Since the transport mechanism is the same as that shown in FIG. In the deformation mechanism, the pressing roller 12b, the fulcrum roller 13a, and the pressing roller 14b are arranged on one side of the conveyance path of the wire 2 and the pressing roller 12a, the fulcrum roller 13b, and the pressing roller 14a are arranged on the other side. The pushing roller 12a, the fulcrum roller 13a, and the pressing roller 14a are configured so that the wire 2 is curved and deformed in one direction (downward in the drawing), and the wire 2 is drawn out in a clockwise direction like FIG. 6 (a). Mold. On the other hand, the pressing roller 12b, the fulcrum roller 13b, and the pressing roller 14b are formed so that the wire 2 is curved and deformed in the opposite direction (upward in the drawing), and the wire 2 is spirally fed out counterclockwise.

Since the winding direction of the wire 2 can be changed in this way, as will be described later, when forming a plurality of coils with one continuous wire 2, from either of both ends of the coil However, it becomes possible to form, and the crossover wire can be appropriately set by the wire 2 in accordance with the arrangement of the coils.

FIG. 7 is an explanatory diagram showing a shape related to the winding structure. In the example described above, the rectangular winding structure has been described. However, it can be formed in a cylindrical shape as shown in FIG. 7A, or can be formed in an elliptical cylindrical shape. In the example shown in FIG. 7A, the wire is deformed in a curved shape over the entire circumference, and the whole is a curved portion. Then, the curvature of the curved portion is set to be larger than the curved portion adjacent to the outside and smaller than the curved portion adjacent to the inside, so that the curved portions are closely adhered to each other.

Moreover, as shown in FIG.7 (b), it can also form in the cylinder shape of a triangle, and can also form in the shape of various polygonal cylinders. Moreover, as shown in FIG.7 (c), it can also be easily formed in the shape which combined the curve part and the linear part corresponding to the attachment position. In the example shown in FIGS. 7B and 7C, the curved portion is partially arranged. Also in this example, the curvature of the curved portion is set to be larger than the curved portion adjacent to the outside and smaller than the curved portion adjacent to the inside, and the curved portions are formed to closely overlap each other.

In addition to the example shown in FIG. 7, the wire 2 can be curved and deformed to form curved portions of various shapes, and the curvature of the curved portion can be set so as to be in close contact with and overlap with the curved portion adjacent to the outside or inside. A winding structure having a high space factor that is appropriately formed according to the mounting location can be obtained.

FIG. 8 is a schematic configuration diagram using a winding structure for a rotating device. In this example, a plurality of coils 200 having a winding structure according to the present invention are attached to a stator of a rotating device. The coils 200 are respectively inserted into a plurality of teeth 202 provided on the inner peripheral side of the stator yoke 201 and are arranged in the circumferential direction. In FIG. 8, the coil 200 is shown in a sectional view, and the wire constituting the coil 200 is drawn in a rectangular section. The coil 200 constitutes a three-phase coil, and every two in-phase coils 200 are arranged and connected to each other.

A plurality of winding layer portions constituting the coil 200 are arranged in the radial direction of the stator, and the number of turns of the winding layer portion from the inner diameter side toward the outer diameter side corresponding to the shape of the slot between the teeth 202. Is set to increase. In the winding structure according to the present invention, the number of turns can be changed for each winding layer portion. Therefore, if the number of turns of the winding layer portion is set in accordance with the shape of the slot, the wire rod can have a gap as small as possible in the slot. It is possible to improve the space factor by arranging. In this example, the slot is set to have as little gap as possible by changing the number of turns of the adjacent wound layer portions of the adjacent coils 200. It should be noted that the number of winding layers constituting the coil 200 can be appropriately set according to the design of the stator, and the number of winding layers of some of the coils 200 can be varied.

In this example, the coil 200 uses the winding structure shown in FIG. 1, and the long side portion of the winding structure is disposed in the slot, and the short side portion of the winding structure protrudes above and below the teeth. Placed in. Since the curved portions on both sides of the short side portion of the winding structure are set to have a small curvature, a space is formed between the curved portions arranged opposite to each other with the adjacent coil 200. It can be used as an arrangement space for lead lines. Therefore, it is possible to make the entire stator more compact than in the case where a crossover or the like is arranged on the upper surface of the short side portion as in the conventional coil.

FIG. 9 is an explanatory diagram relating to the connection of the in-phase coils of the stator shown in FIG. In FIG. 9, for easy understanding, only the connection of coils related to one phase is shown, and the coils of other phases are omitted because they are the same connection. A coil related to one phase is connected to the adjacent coil by a connecting wire 203 on the inner diameter side, and the other is connected by a connecting wire 204 on the outer diameter side, and the coils are at the end on the same side. Connected by a crossover. Since the lead wire 205 is connected on the outer diameter side, the crossover wire and the lead wire can be shortened. In this case, the connecting wire and the lead wire are formed of one continuous wire together with the coil. That is, as described with reference to FIG. 6B, when one continuous wire is deformed in a spiral shape, the circumferential direction can be deformed either clockwise or counterclockwise. After forming the coil clockwise or counterclockwise from the side to the outer diameter side, form a connecting wire to connect on the outer diameter side, and continue to watch the next coil from the outer diameter side to the inner diameter side. It can be formed in either a clockwise or counterclockwise direction. If the two formed coils are arranged in parallel in the circumferential direction of the stator, they can be set in either the same or opposite circumferential direction. In this way, by forming the wire rod in a spiral shape clockwise or counterclockwise and forming a crossover wire therebetween, the crossover wire and the lead wire can be formed together with the coil by one continuous wire rod. For this reason, it is possible to suppress an increase in wiring resistance as compared with the case where the connecting wire and the lead wire are separately connected.

In addition, as described above, the connecting portion of the winding layer portion of the winding structure is disposed in close contact with the inner peripheral side and the outer peripheral side of one short side portion, so that the long side portion of the coil is inserted into the slot. If attached so as to be worn, it is possible to improve the density of the wire rod in the slot, and it is possible to reduce the thickness of the short side portion protruding upward and downward of the teeth and to make it compact.

FIG. 10 is an explanatory diagram regarding the connection of the in-phase coils of the stator shown in FIG. In this example, in-phase coils are connected to each other between the inner diameter side and the outer diameter side of the coils with crossover wires 206 to 208, and the coils are connected to each other at the end portions on different sides. The coils of each phase are connected to each other by connecting wires 206 to 208, and lead wires 209 to 211 are connected on the outer diameter side, respectively. Since the connecting wires 206 to 208 connecting the coils of the respective phases are arranged without crossing each other, the space in the thickness direction of the connecting wires can be made thinner than when the connecting wires cross each other.

Coils of one phase are connected by a crossover wire 206, and the coil and the crossover wire 206 are formed by one continuous wire. That is, in the molding apparatus shown in FIG. 6, when one continuous wire is deformed in a spiral shape, the coil is molded clockwise or counterclockwise from the outer diameter side to the inner diameter side of the stator. Once the connecting wire is formed and the adjacent coil is formed clockwise or counterclockwise from the outer diameter side to the inner diameter side, the connecting wire is connected from the inner diameter side of the coil to the outer diameter side of the adjacent coil. Can be formed. By forming the necessary number of coils and connecting wires in this manner and attaching them to the stator, the coils can be attached to one phase. Similarly, the coil and the crossover wire 207 and the coil and the crossover wire 208 may be formed and inserted into the stator for another phase. At that time, since the crossover lines of the respective phases do not cross each other, they can be easily attached. In addition, since the connecting wire can be formed together with the coil with a single continuous wire, it is possible to suppress an increase in wiring resistance as compared with the case where the connecting wire is connected separately. And the length of a connecting wire can be shortened by wiring along a coil surface so that a connecting wire may cross | intersect a coil.

FIG. 11 is a schematic configuration diagram using another winding structure for the rotating device. In this example, similarly to the example shown in FIG. 8, a plurality of coils 200 'are attached to the stator of the rotating device. The number of turns of the coil 200 ′ is set so that the winding layer portion is nested with the winding layer portion of the adjacent coil 200 ′. In the winding structure according to the present invention, since the number of turns can be changed for each winding layer part, the number of turns of the winding layer part 200a ′ at the middle part of the coil is reduced and the corresponding winding layer part of the adjacent coil is reduced. By increasing the number of turns of 200b ′, the wire can be arranged in the slot without any gap. Further, in this example, the winding layer portion 200c 'is added to a part of the coils 200' by utilizing the empty space on the inner diameter side of the teeth, and the space factor of the wire can be further improved. As described above, the number of turns of the winding layer portion and the number of winding layer portions can be changed in accordance with the arrangement space of the coil so that the wire can be arranged without any gap, and it is possible to deal with various rotating devices.

In the example described above, the winding structure is inserted as a coil inside the stator and the rotor is attached to the inside of the coil to constitute a rotating device. However, the winding structure is inserted as a coil outside the stator. The rotating device can also be configured so that the rotor is attached to the outside of the coil. Further, the rotating device can be configured by inserting the winding structure into the rotor.

In addition to the rotating device having the stator described above, the winding structure of the present invention can be used and is not particularly limited. For example, the present invention can also be applied to a driving device such as a linear motor in which a plurality of coils are linearly arranged. The transformer can also be applied to the primary side coil and the secondary side coil. In that case, the winding layers of the primary side coil and the secondary side coil can be set to different numbers, or the number of turns of the winding layer portion can be set. It can be set to a different number. Furthermore, it is possible to easily attach a plurality of winding structures as secondary coils, and it is possible to cope with various designs of transformers.

DESCRIPTION OF SYMBOLS 1 ... Winding structure, 2 ... Wire rod, 3 ... Winding layer part, 10 ... Drive roller, 11 ... Driven roller, 12 ... Push-in roller, 13 ... Supporting roller, 14 ... presser roller, 100 ... winding structure, 200 ... coil, 201 ... yoke, 202 ... teeth, 203 ... crossover, 204 ... crossover, 205 ... Lead-out line 206: Crossover line 207 ... Crossover line 208 ... Crossover line 209 ... Lead-out line 210 ... Lead-out line 211 ... Lead-out line

Claims (7)

In the thickness direction, a plurality of wound layer portions formed by spirally superposing one continuous flat rectangular cross-section wire formed by alternately forming curved portions and straight portions and spirally winding In the curved portion, the winding layer portion has a curvature radius corresponding to the curvature of the curved portion of the circumferential portion adjacent to the outer peripheral side, and the curved portion of the curved portion of the circumferential portion adjacent to the inner peripheral side. The wire is formed such that the curvature gradually decreases from the inner circumference side toward the outer circumference side by setting a value obtained by adding the length in the deformation direction of the cross section of the wire to the radius of curvature corresponding to the curvature. At least one of the winding layer portions is different from the other winding layer portions in the number of turns of the wire, and the winding layer portions other than both end portions are in the winding layer portion adjacent to the side of the outer peripheral side The wire that is not disposed opposite the inner peripheral side of the same edge portion and the winding layer portion and the outer peripheral side is continuously adjacent to the other side with the wire that is not directed disposed is continuously connected The winding structure which is connected and is set in a state in which the adjacent winding layer portions are in contact with each other so as to abut against each other in the middle portion so as to abut against each other.   An electric device comprising the winding structure according to claim 1.   The electrical device according to claim 2, comprising a plurality of types of winding structures in which the number of turns of at least one of the winding layer portions is different.   The electrical device according to claim 3, wherein the number of the winding layer portions of at least one of the winding structures is different.   The electric device according to claim 3 or 4, wherein a plurality of the winding structures are formed by one continuous wire.   Crossing wires connecting the plurality of winding structures are formed by the wire material, and the connecting wires are connected on the inner diameter side or the outer diameter side of the plurality of winding structures arranged in the circumferential direction. Item 6. The electric device according to Item 5.   A connecting wire connecting the plurality of winding structures is formed by the wire, and the connecting wire connects the inner diameter side and the outer diameter side of the plurality of winding structures arranged in the circumferential direction and the winding. The electric device according to claim 5, wherein the electric device is wired along the winding structure so as to intersect the line structure.