JP2008193860A - Collective conductor and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a wire space factor in a slot as much as possible. <P>SOLUTION: A collective conductor 10a includes a collective wire 5 where a plurality of conductor wires 3 having part of rectangular cross sections, which is obtained by dividing a whole cross section shape, are integrated, and a peripheral coating layer 6 for coating and insulating the collective wire 5. The peripheral coating layer 6 is formed by a tubular body stuck to a surface of the collective wire 5 by self-elastic force. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a collective conductor formed by integrating a plurality of conductor wires and a method for manufacturing the same.

  As a magnet wire used for a coil of an electromagnetic machine instrument, a collective conductor in which a plurality of conductor wires are bundled and configured integrally has been proposed.

For example, Patent Document 1 discloses a self-bonding dislocation electric wire in which a plurality of self-bonding rectangular enamel wires are gathered, dislocated, and twisted and wound around an outer periphery of a twisted wire with an insulating tape spirally wound. A fusible rectangular enameled wire is a self-lubricating / self-fusing rectangular enameled wire. According to Patent Document 1, according to this self-bonding dislocation wire, the wires are excellent in mutual slipping during the manufacturing operation of the dislocation wire and the coil winding operation, and the coil is heat-sealed. It is described that the strands can be firmly heat-sealed.
Japanese Patent Laid-Open No. 11-203948

  In recent years, gathering conductors have attracted attention as magnet wires for electric vehicle motors.

  FIG. 6 is a cross-sectional view showing a state in which the conventional collective conductor 110 is arranged in the slot S of the stator core 120 constituting the motor, and FIG. 7 is a perspective view showing each collective conductor 110.

  As shown in FIG. 7, the collective conductor 110 includes a conductor wire 101 having a rectangular cross section, and an insulating wire covering layer 102 provided so as to cover the conductor wire 101. A plurality of conductor wires 103, a fusion layer 104 for fusing the plurality of conductor wires 103 to each other, and a collective wire 105 in which the plurality of conductor wires 103 are integrated by the fusion layer 104 are provided. And an outer peripheral coating layer 106 having insulating properties.

  The stator core 120 is formed in a cylindrical shape, and a plurality of concave stripes (slots S) and convex stripes 120a are alternately formed in the circumferential direction on the outer peripheral wall or inner peripheral wall thereof as shown in FIG.

  Here, the outer peripheral covering layer 106 prevents contact with the corner portion C of the ridge 120a when the assembly conductor 110 is disposed in the slot S of the stator core 120 and is damaged, and also prevents the top portion (jumper) of the ridge 120a. In order to maintain the insulation with respect to the part J), for example, as shown in FIG. 7, a tape-like resin film is spirally overlapped and wound. Note that if the assembly conductor 110 is bent to form a coil, a difference in length occurs between the outer peripheral portion and the inner peripheral portion, and a gap may be formed between the overlapping resin films. Therefore, in order to maintain the insulating property of the collective conductor, it is necessary to overlap the side end portions of the resin film to some extent.

  In the collective conductor 110, as described above, since the side end portions of the resin film are overlapped, a spiral convex portion is formed on the surface thereof. Therefore, when the collective conductors 110 are arranged in the slots S of the stator core 120, for example, between the collective conductors 110 and the surface of the ridge 120a (inner wall of the slot S) and adjacent collective conductors 110 to each other. As a result, a dead space is formed between the surfaces of the first and second surfaces. Therefore, the ratio of the cross-sectional area of the collective conductor 110 to the cross-sectional area of the slot S, that is, the wire space factor in the slot S may be reduced.

  The present invention has been made in view of such a point, and an object thereof is to improve the wire space factor in the slot as much as possible.

  In order to achieve the above object, the present invention is such that an outer peripheral coating layer for covering and insulating a collecting wire is formed by a cylindrical body that adheres to the surface of the collecting wire by its own elastic force. is there.

  Specifically, the collective conductor according to the present invention covers and insulates the collective line obtained by integrating a plurality of conductor wires each having a partial cross section of the entire cross-sectional shape and the collective line. The outer peripheral covering layer is formed of a cylindrical body that is in close contact with the surface of the collecting wire by its own elastic force.

  According to said structure, since the cylindrical outer periphery coating layer is closely_contact | adhered to the surface of the assembly line by its own elastic force, the outward spreading of the outer periphery coating layer is suppressed. Therefore, since the thickness of the outer peripheral covering layer that insulates the entire assembly conductor is suppressed, the conductor space factor in the assembly conductor is improved as much as possible. As a result, when the collective conductor is arranged in the slot of the stator core, the adjacent collective conductors are arranged between the surface of the collective conductor and the inner wall of the slot (and when arranging a plurality of collective conductors in one slot). Since the dead space is less likely to be formed between the two surfaces), the space factor of the wire in the slot is improved as much as possible.

  The cylindrical body may be formed of a heat-shrinkable resin tube.

  According to the above configuration, the aggregated wire, that is, the entire aggregated conductor is insulated by the heat-shrinkable resin tube constituting the cylindrical body, so that the operational effects of the present invention are specifically exhibited.

  The tube may be made of a fluororesin.

  According to said structure, since a fluororesin is a material with a low friction coefficient generally, the slipperiness | lubricity of the surface of an assembly conductor becomes favorable. Therefore, if the collective conductor contacts the corner portion of the stator core when the collective conductor is arranged in the slot of the stator core, the collective conductor slides with respect to the corner portion of the stator core. Damage is suppressed.

  The cross section of each conductor line may be formed in a rectangular shape.

  According to the above configuration, since the cross section of each conductor wire is rectangular, each conductor wire is easily aligned in the width direction and height direction by overlapping the side surfaces of each conductor wire, It becomes possible to improve the conductor space factor in the conductor.

  Each of the conductor wires may be covered with a fusion layer for fusing each other.

  According to the above configuration, the plurality of conductor wires are integrated by the fusion layer interposed therebetween, so that the assembly line constituting the assembly conductor is specifically configured.

  Each said conductor wire may be integrated in the untwisted state.

  According to said structure, since each conductor wire is arranged in the non-twisted state, formation of a dead space is suppressed and generation | occurrence | production of an eddy current is suppressed in a collective conductor.

  In addition, the method for manufacturing an aggregate conductor according to the present invention includes an aggregate line in which a plurality of conductor wires each having a partial cross section obtained by dividing the overall cross-sectional shape are integrated with the aggregate line. An assembly conductor comprising an outer peripheral covering layer for insulation, wherein the assembly wire is inserted into a heat-shrinkable tube to form an insert, and the insertion And heating the insert formed in the step to heat-shrink the tube to form the outer peripheral coating layer that is in close contact with the surface of the assembly line.

  According to the above method, in the insertion step, after the assembly wire is inserted into the heat-shrinkable tube, by heating it in the heating step, the tube outside the insert is thermally contracted, Since the outer peripheral coating layer formed by the heat-shrinkable tube is in close contact with the surface of the assembly line by its own elastic force, the outward spreading of the outer peripheral coating layer is suppressed. Therefore, since the thickness of the outer peripheral covering layer that insulates the entire assembly conductor is suppressed, the conductor space factor in the assembly conductor is improved as much as possible. As a result, when the collective conductor is arranged in the slot of the stator core, the adjacent collective conductors are arranged between the surface of the collective conductor and the inner wall of the slot (and when arranging a plurality of collective conductors in one slot). Since the dead space is less likely to be formed between the two surfaces), the space factor of the wire in the slot is improved as much as possible.

  Each conductor wire in the assembly line is covered with a fusion layer for fusing each other, and in the heating step, the fusion layer may be re-melted and adhered to the outer peripheral coating layer.

  According to the above method, since each conductor wire constituting the assembly line is covered with the fusion layer, the surface of the assembly line in which a plurality of conductor wires are integrated is also covered with the fusion layer. Therefore, in the heating step, when the insert is heated and the tube outside the insert is heat-shrinked, the fused layer on the surface of the assembly line is re-melted, so that the inner wall of the tube constituting the outer peripheral coating layer Adhesion with the surface of the assembly line is improved.

  According to the present invention, the outer peripheral coating layer for covering and insulating the assembly line is formed by the cylindrical body that is in close contact with the surface of the assembly line by its own elastic force. It can be improved as much as possible.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following embodiments.

Embodiment 1 of the Invention
1 to 4 show Embodiment 1 of an aggregate conductor and a method for manufacturing the same according to the present invention.

  FIG. 1 is a perspective view of the collective conductor 10a of the present embodiment.

  As shown in FIG. 1, the collective conductor 10 a has a plurality of conductor wires 3 arranged in a non-twisted state in, for example, 6 rows (horizontal direction in the figure) × 3 columns (vertical direction in the figure) in the cross section. A fusion layer 4 provided so as to cover each conductor wire 3, and an outer peripheral coating layer 6 provided so as to cover the aggregated wire 5 in which the plurality of conductor wires 3 are integrated by the fusion layer 4. I have. Here, the plurality of conductor wires 3 are fused and integrated with each other by a fusion layer 4 formed on each surface.

  Each conductor wire 3 has a rectangular cross section, and is, for example, a conductor wire 1 formed in a linear shape from a conductive material such as copper, aluminum, silver, iron, gold, or an alloy thereof. It is. The cross section of the conductor wire 3 (conductor wire 1) has a partial shape obtained by dividing the rectangular overall cross section of the collective conductor 10a.

  The conductor wire 3 having a rectangular cross section, that is, the conductor wire 1 is, for example, as shown in FIG. 2A, a conductor wire having a square cross section with a right corner. As shown in FIG. 1a and FIG. 2 (b), a conductor wire 1b having a rectangular cross section whose corner is a right angle, and as shown in FIG. 2 (c), a substantially square crossing whose corner is an R shape. As shown in FIG. 2D, a conductor wire 1c having a surface, a conductor wire 1d having a substantially rectangular cross section with corners having an R shape, and as shown in FIG. The pair of opposite sides are parallel and the other pair of opposite sides are selected from a conductor element wire 1e having a track-like cross section having an arc shape. In addition, each shape of the said FIG. 2 (a)-FIG.2 (e) can be formed by forming the bus-line of a conductor as a wire drawing by a die | dye, or can be processed and formed by process forming apparatuses, such as roller rolling. 2 (e) can be processed and molded by rolling a round busbar from one direction.

  Furthermore, the cross-sectional shape of the conductor wire 1 is preferably the above rectangular shape from the viewpoint of the conductor space factor and productivity, but may be a polygon such as a triangle or a hexagon. Here, since the conductor wire 1 is a rectangular wire having a relatively small surface area, the area occupied by the fusion layer 4 can be reduced and can be adapted to various sizes.

  Moreover, the cross-sectional shape of the conductor wire 1 may not be all the same along the length direction, for example, the similar shape that a cross-sectional area expands or shrinks along the length direction may be sufficient. .

  Further, in the conductor element wire 1, by setting the length of the long side to 1 to 1.5 times (preferably 1 to 1.2 times) the length of the short side, m rows × n columns (m When n and n are natural numbers), the conductor space factor is improved and an insulated conductor having a large surface area can be obtained, so that the motor used in an electric vehicle such as a hybrid vehicle can be reduced in size and weight. .

Moreover, the size of the conductor wire 1 should just be the size corresponding to the round wire of 0.03 mmphi-2.0mmphi, for example, whose one side is about 0.05mm-2mm (preferably 0.05mm-1mm). The cross-sectional area is about 0.0007 mm ^{2 to 4} mm ² .

  The conductor wires 1 constituting the collective conductor 10a have the same shape, for example, by combining the conductor wires 1a having a square cross section and the conductor wires having a triangular cross section. It does not have to be.

  The fusing layer 4 has an electrical insulating property, and is made of a resin having a thermal fusing property such as polyvinyl butyral, polyamide, epoxy, or polyester. Here, since the fusion | melting layer 4 is comprised with the above resins, it functions as an insulating layer for insulating between each conductor strand 1 in the assembly conductor 10a.

  Moreover, the thickness of the fusion | melting layer 4 is about 0.5 micrometer-3 micrometers. Here, in the collective conductor 10a, the conductor wires 1 are at the same potential, and it is difficult for current to flow between the adjacent conductor strands 1. Therefore, the fusion layer 4 is provided in the collective conductor 10a. As long as the conductor wire 1 can be fixed, it may not be uniformly formed on the surface of the conductor wire 1.

  The outer peripheral coating layer 6 has electrical insulation, and is formed of, for example, a tubular body obtained by thermally shrinking a PTFE (polytetrafluoroethylene) tube. In addition to the PTFE, the outer peripheral coating layer 6 is made of fluorine resin such as FEP (perfluoroethylene-propylene copolymer) and PFA (perfluoroalkoxyalkane polymer), polyolefin resin, polyvinyl chloride resin, polyfluoride resin. It is formed by thermally shrinking a heat-shrinkable tube made of vinylidene chloride resin, ethylene propylene rubber, silicon rubber, elastic neoprene, or the like.

  The thickness of the outer peripheral coating layer 6 is about 30 μm to 50 μm and may have an insulating property of AC (alternating current) of 1 kV or higher (preferably AC of 2 kV or higher).

  As shown in FIG. 3, the assembly conductor 10a having the above configuration is, for example, arranged in a plurality of layers in each slot S formed in the stator core 20 constituting the motor. In FIG. 3, the curved stator core 20 is illustrated as being replaced with a flat surface, but the stator core 20 is formed in a cylindrical shape, and the outer circumferential wall or inner circumferential wall thereof has a concave line (slot S) and a convex line. A plurality of 20a are alternately formed in the circumferential direction.

  First, for example, the conductor wire 1 having a square cross section with a side of 0.3 mm is drawn.

  Subsequently, for example, an epoxy varnish is dip-coated on the surface of the drawn conductor wire 1 to form the fusion layer 4, and then the conductor wire 1 is cut into, for example, lengths of 5 m. Divide into

  Furthermore, after aligning the plurality of conductor strands 1 each having the fusion layer 4 formed on the surface thereof in an untwisted state, each of the adjacent conductor strands 1 is fused by heating to about 200 ° C. The layers 4 are fused and integrated with each other to form, for example, a collecting line 5 having a length of 1 mm × width of 2 mm × length of 5 m.

  Subsequently, as shown in FIG. 4, for example, the assembly wire 5 is inserted into a heat-shrinkable tube 6a made of PTFE having an inner diameter of 3 mm, an outer diameter of 3.1 mm, and a length of 5 m. 7 is formed (insertion step).

  Finally, the insert 7 is heated to about 330 ° C. to 340 ° C., whereby the tube 6a is thermally contracted to form the outer peripheral coating layer 6 (heating step). The heat shrink ratio (the inner diameter after contraction / the inner diameter before contraction) of the tube 6a is preferably 1 / 1.5 to 1/10, and more preferably 1/2 to 1/5.

  As described above, the collective conductor 10a of the present embodiment can be manufactured.

  Next, a specific experiment will be described.

  Specifically, as Experimental Example 1 and Experimental Example 2, an assembly conductor having the same configuration as that of the assembly conductor 10a described in the above embodiment is manufactured, and a slot S having a width of 1.2 mm, a depth of 4.5 mm, and a length of 50 mm is prepared. The wire space factor, pressure resistance, trauma resistance, workability, bending resistance and heat resistance at that time were evaluated.

  In addition, as Experimental Example 3 and Experimental Example 4, the assembly conductor is formed by superimposing and winding a tape-shaped resin film around the assembly line (5) constituting the assembly conductor of Experiment Example 1 and Experiment Example 2. As in the case of Experimental Example 1 and Experimental Example 2, the wire is inserted into a slot S having a width of 1.2 mm, a depth of 4.5 mm, and a length of 50 mm. The trauma, workability, flex resistance and heat resistance were evaluated. Here, the resin film wound around the assembly line had a width of 5 mm, and 1 mm was overlapped on its side end.

  Table 1 below shows the evaluation results in each of the above experimental examples. In Table 1, “◎” indicates that it is particularly excellent, “○” indicates that it is generally good, “△” indicates that it is slightly inferior, and “×” indicates that it is very inferior. ing.

  Regarding the wire space factor, Experimental Example 1 using a heat-shrinkable tube having a thickness of 0.038 mm was good. The wire space factor becomes 100% when only the aggregated conductor (aggregate line) having no outer peripheral coating layer corresponding to the shape of the slot is arranged in the slot.

  The withstand voltage characteristics exceeded 1 kV in all the experimental examples and were good. The breakdown voltage characteristic is a numerical value measured between the collective conductor and the slot.

  As for the resistance to trauma, Experimental Example 1 using a heat-shrinkable tube made of PTFE was good due to its surface slipperiness. In Experimental Example 2, the damage resistance was good due to the thickness of the outer peripheral coating layer.

  Regarding workability (when forming the outer peripheral coating layer), Experimental Example 1 and Experimental Example 2 using a heat-shrinkable tube were good.

  Regarding bending resistance, Experimental Example 1 and Experimental Example 2 using a heat-shrinkable tube were good. In Experimental Example 3 and Experimental Example 4 in which the outer peripheral coating layer was formed by winding the film, the film was displaced when bent.

  Regarding heat resistance, Experimental Example 1 and Experimental Example 3 using a PTFE heat-shrinkable tube and a polyimide film were good.

  As described above, in Experimental Example 1 using the heat-shrinkable tube made of PTFE, the wire space factor is good, and other characteristics such as pressure resistance characteristics, trauma resistance, workability, flex resistance, and heat resistance are provided. It was confirmed that it was also good.

  As described above, according to the assembly conductor 10a and the manufacturing method thereof of the present embodiment, after the assembly wire 5 is inserted into the heat-shrinkable tube 6a in the insertion step, it is heated in the heating step. Thus, by thermally shrinking the outer tube 6a of the insert 7, the outer peripheral coating layer 6 formed by the thermally contracted tube 6a is brought into close contact with the surface of the assembly line 5 by its own elastic force. The outward spreading of the coating layer 6 can be suppressed. Therefore, since the thickness of the outer peripheral covering layer 6 that insulates the entire assembly conductor 10a is suppressed, the conductor space factor in the assembly conductor 10a can be improved as much as possible. Thereby, when the assembly conductor 10a is disposed in the slot S of the stator core 20, a dead space is formed between the surface of the assembly conductor 10a and the inner wall of the slot S and between the surfaces of the adjacent assembly conductors 10a. Since it becomes difficult to form, the space factor of the wire in the slot S can be improved as much as possible.

  In addition, according to the collective conductor 10a and the manufacturing method thereof according to the present embodiment, the tube 6a constituting the outer peripheral coating layer 6 is made of a fluororesin (PTFE) having a low friction coefficient, so that the surface of the collective conductor 10a has a slipperiness. Become good. Therefore, even when the collective conductor 10a contacts the corner portion C of the stator core 20 when the collective conductor 10a is disposed in the slot S of the stator core 20, the collective conductor 10a slides with respect to the corner portion C of the stator core 20. Therefore, damage to the collective conductor 10a can be suppressed.

  Further, according to the collective conductor 10a and the manufacturing method thereof of the present embodiment, since the tube 6a constituting the outer peripheral coating layer 6 is made of a fluororesin (PTFE) excellent in electrical insulation, the insulation of the surface of the collective conductor 10a is performed. Good. Therefore, the insulation between the collective conductor 10a and the jumper portion J of the ridge 20a in the stator core 20 can be maintained.

  Moreover, according to the collective conductor 10a of this embodiment and its manufacturing method, since the cross section of each conductor wire 3 (conductor strand 1) is rectangular, each conductor wire 3 (conductor strand 1) By superimposing the side surfaces, the conductor wires 3 (conductor wires 1) can be easily aligned in the width direction and the height direction, and the conductor space factor in the collective conductor 10a can be improved.

  Further, according to the collective conductor 10a and the manufacturing method thereof of the present embodiment, since the conductor wires 3 (conductor strands 1) are arranged in an untwisted state, the formation of dead space is suppressed in the collective conductor 10a. And generation of eddy currents can be suppressed.

  Further, according to the collective conductor 10a and the manufacturing method thereof of the present embodiment, each conductor wire 3 (conductor strand 1) that constitutes the collective wire 5 is covered with the fusion layer 4, so that a plurality of conductor wires 3 are provided. The surface of the assembly wire 5 in which the (conductor element wire 1) is integrated is also covered with the fusion layer 4. Therefore, in the heating process, when the insert 7 is heated and the tube 6a outside the insert 7 is thermally contracted, the fusion layer 4 on the surface of the assembly line 5 is remelted. Adhesion between the inner wall of the tube 6a and the surface of the assembly line 5 can be improved.

  In addition, according to the collective conductor 10a and the manufacturing method thereof of the present embodiment, a product shape having a high space factor that satisfies the electrical characteristics can be obtained, so that a high-performance motor can be manufactured.

  In addition, according to the collective conductor 10a and the manufacturing method thereof according to the present embodiment, since the outer peripheral coating layer 6 is formed by the heat-shrinkable tube 6a, there is variation in the shape of the collective wire 5 constituting the collective conductor 10a. However, since the tube 6a follows the shape and adheres completely, stable productivity can be maintained.

  Moreover, according to the assembly conductor 10a and the manufacturing method thereof of the present embodiment, the outer peripheral coating layer 6 is formed simply by inserting the assembly wire 5 into the heat-shrinkable tube 6a and heating the insertion body 7. Compared with the conventional insulation method in which a tape-shaped resin film is wound, the labor of processing is extremely reduced, and the manufacturing cost can be reduced.

<< Embodiment 2 of the Invention >>
FIG. 5 is a perspective view of the collective conductor 10b of this embodiment. In the following embodiments, the same parts as those in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the collective conductor 10b, as shown in FIG. 5, each conductor wire 3 includes a conductor wire 1 and an insulating wire covering layer 2 provided around the conductor wire 1.

  Examples of the material for the wire covering layer 2 include those formed by dip coating, such as polyamideimide, polyesterimide, polyester, urethane, acrylic, epoxy, polyimide, and polyvinyl formal resins. Examples of the resin formed by electrodeposition coating include acrylic, polyester, polyimide, epoxy, and urethane resins. In particular, when heat resistance is taken into consideration, a resin such as polyimide or polyamideimide is preferable. Moreover, when considering the connectivity by solder, urethane-based resin that is easily thermally decomposed is preferable. Furthermore, when considering the followability due to deformation such as bending, an acrylic resin is preferable. The strand covering layer 2 may be an oxide film obtained by oxidizing the surface of the conductor strand 1.

  The film thickness of the wire coating layer 2 is about 1 μm to 5 μm (preferably 1 μm to 3 μm) in the case of electrodeposition coating, and about 1 μm to 10 μm in the case of dip coating. Here, in the case of electrodeposition coating, since a uniform thin film of about 1 μm can be formed on the surface of the conductor wire 1, the cross-sectional area of the wire covering layer 2 is reduced, and the conductor occupation in the conductor wire 3 is reduced. The product ratio can be improved. Moreover, in the case of electrodeposition coating, the strand coating layer 2 can be reliably formed also in the corner part of the conductor strand 1. FIG. Specifically, the thickness of the strand covering layer 2 at the end in the width direction of the conductor strand 1 is formed to be the same as the thickness of the strand covering layer 2 at the center in the width direction of the conductor strand 1. Therefore, it is possible to improve the insulation between the conductor strands 1 in the collective conductor 10 without reducing the conductor space factor in the collective conductor 10.

  Here, the assembly conductor 10b is made of acrylic resin by, for example, electrodeposition coating before forming the fusion layer 4 on the surface of each conductor wire 1 in the method of manufacturing the assembly conductor 10a described in the first embodiment. It can be manufactured by forming a resin of a thickness of about 0.5 μm to 1 μm and forming the strand covering layer 2 on the surface of each conductor strand 1.

  According to the collective conductor 10b and the manufacturing method thereof according to the present embodiment, the conductor covering layer 2 and the fusion layer 4 are sequentially laminated on the conductor strand 1, so that each conductor The insulation in the strand 1 can be improved.

  As described above, the present invention can improve the conductor space factor in the collective conductor, and thus is useful for magnet wires for motor applications.

2 is a perspective view of a collective conductor 10a according to Embodiment 1. FIG. It is sectional drawing of the conductor strand 1 (1a-1e) which comprises the collective conductor 10a. 4 is a cross-sectional view showing a state in which the aggregate conductor 10a is disposed in the slot S of the stator core 20. FIG. It is a perspective view of the insertion body 7 in the insertion process which manufactures the collective conductor 10a. It is a perspective view of the collective conductor 10b which concerns on Embodiment 2. FIG. FIG. 6 is a cross-sectional view showing a state in which a conventional collective conductor 110 is arranged in a slot S of a stator core 120. It is a perspective view which shows the conventional assembly conductor 110. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conductor strand 2 Strand covering layer 3 Conductor wire 4 Fusion layer 5 Assembly wire 6 Outer periphery coating layer (tubular body)
6a Tube 7 Insert 10a, 10b Collective conductor

Claims (8)

An assembly line in which a plurality of conductor wires each having a cross-section of a part of a shape obtained by dividing the overall cross-sectional shape are integrated;
An assembly conductor comprising an outer peripheral coating layer for covering and insulating the assembly wire,
The outer conductor coating layer is formed of a cylindrical body that is in close contact with the surface of the aggregate wire by its own elastic force. In the collective conductor according to claim 1,
The cylindrical conductor is formed of a heat-shrinkable resin tube. In the collective conductor according to claim 2,
The above-mentioned tube is a product made from fluororesin, The collective conductor characterized by the above-mentioned. In the collective conductor according to claim 1,
A cross section of each conductor wire is formed in a rectangular shape. In the collective conductor according to claim 1,
Each of the conductor wires is covered with a fusion layer for fusing the conductor wires together. In the collective conductor according to claim 1,
Each conductor wire is integrated in a non-twisted state. An assembly line in which a plurality of conductor wires each having a cross-section of a part of a shape obtained by dividing the overall cross-sectional shape are integrated;
A method of manufacturing an assembly conductor comprising an outer peripheral coating layer for covering and insulating the assembly wire,
An insertion step of forming an insert by inserting the assembly wire into a tube having heat shrinkability;
A heating step of heating the insert formed in the insertion step to heat-shrink the tube to form the outer peripheral coating layer in close contact with the surface of the assembly line. Production method. In the manufacturing method of the assembly conductor described in Claim 7,
Each conductor wire in the assembly line is covered with a fusion layer for fusing each other,
In the heating step, the fused layer is remelted and closely adhered to the outer peripheral coating layer.

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