JP2008005599A - Manufacturing method for interphase insulating paper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method for interphase insulating paper that is excellent in production efficiency and enables the enhancement of shape accuracy. <P>SOLUTION: The manufacturing method for interphase insulating paper includes the stops of: setting a resin sheet 71 on a progressive processing unit; forming pin holes 76 in the resin sheet 71; stamping the resin sheet 71 to form coil end parts 65m, 65n in the resin sheet 71; bending the coil end parts 65m, 65n relative to the pin holes 76 (S200, S300); and cutting the bent coil end parts 65m, 65n out of the resin sheet 71. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention generally relates to a method for producing interphase insulating paper, and more particularly, to a method for producing interphase insulating paper provided at a coil end portion of a coil wound around a stator core.

  Regarding a conventional method for producing an interphase insulating paper, for example, Japanese Patent Application Laid-Open No. 2005-218255 discloses that a coil end pressing process has sufficient strength without causing paper misalignment, paper tearing, or perforation. An intended interphase insulating paper is disclosed (Patent Document 1). The interphase insulating paper disclosed in Patent Document 1 includes a flat portion and a nose portion. The plane portion and the nose portion are disposed between adjacent two-phase coil ends of the U phase, the V phase, and the W phase. The nose portion has a three-dimensional shape protruding from the flat surface portion so as to correspond to the rising portion of the coil from the stator core.

Japanese Patent Application Laid-Open No. 5-191953 discloses a rotating electrical machine for the purpose of reducing the insertion resistance of the coil and preventing the slot insulation paper and the coil from being damaged when the coil is inserted into the slot of the iron core. An iron core slot insulating paper is disclosed (Patent Document 2). In Patent Document 2, a folding mechanism that bends both end portions of the slot insulating material, an automatic application mechanism that applies fluid paraffin to the slot insulating material, and the slot insulating material is cut and the cross section is substantially U-shaped. The slot insulating paper is produced by an apparatus including a cutting and forming mechanism for forming.
JP 2005-218255 A JP-A-5-191953

  In the above-described Patent Document 1, a nose portion is produced by punching a sheet-like PET resin and folding the punched sheet at a predetermined position. However, in this case, the punched sheets must be individually arranged and conveyed, and the folding process needs to be performed on each sheet, which may reduce the production efficiency of interphase insulating paper. In addition, since the folding position is not set accurately, the shape of the interphase insulating paper may vary.

  Accordingly, an object of the present invention is to solve the above-described problems, and to provide a method for producing an interphase insulating paper that is excellent in production efficiency and can improve shape accuracy.

  The method for producing interphase insulating paper according to the present invention is a method for producing interphase insulating paper that is a coil wound around a stator core and insulates between adjacent two-phase coils. The method for producing the interphase insulating paper includes a step of installing the base material in a progressive mold processing device, a step of forming pin holes in the base material, a step of punching the base material, and forming the interphase insulating paper on the base material. And a step of bending the interphase insulating paper with reference to the pin hole, and a step of separating the interphase insulating paper subjected to the step of bending the interphase insulating paper from the base material.

  In addition, the interphase insulating paper in the present invention is not limited to that formed from a paper material, but includes paper formed from a material having insulating properties other than the paper material.

  According to the method for producing interphase insulating paper configured as described above, it becomes possible to continuously perform the punching process and the folding process by the progressive die processing apparatus, and thus the individual interphases separated from the base material. There is no need to perform a folding process on the insulating paper. Thereby, the production efficiency of interphase insulating paper can be improved. Moreover, since the bending process is performed with reference to the pin holes formed in the base material, the shape accuracy of the interphase insulating paper can be improved.

  Preferably, the step of forming the interphase insulating paper includes a step of punching the base material with reference to the pin hole. According to the method for producing the interphase insulating paper configured as described above, the shape accuracy of the interphase insulating paper can be further improved.

  Preferably, the step of forming the pin holes and the step of forming the interphase insulating paper are performed in the same step of the progressive die processing apparatus. According to the method for producing the interphase insulating paper configured as described above, the production efficiency of the interphase insulating paper can be further improved.

  Further preferably, the base material on which the interphase insulating paper is formed is connected to the carrier portion extending continuously in the feeding direction of the progressive die processing apparatus and the interphase insulating paper, and supports the interphase insulating paper with respect to the carrier portion. Including a bridge portion. The step of forming the pin hole includes a step of forming the pin hole in the bridge portion. According to the method for producing interphase insulating paper configured as described above, since the pin hole is formed in the bridge portion, it is possible to leave the pin hole in the base material after the punching process regardless of the shape of the interphase insulating paper. It becomes. Moreover, since the pin hole is formed at a position adjacent to the interphase insulating paper, it is possible to more reliably prevent the positional deviation of the base material during the bending process. Thereby, the shape accuracy of the interphase insulating paper can be further improved.

  Further preferably, the step of separating the interphase insulating paper includes a step of separating the interphase insulating paper from the base material so that the portion of the base material in which the pin holes are formed is left on the interphase insulating paper. The method for producing the interphase insulating paper further includes a step of interposing the interphase insulating paper between the adjacent two-phase coils after the step of separating the interphase insulating paper. The step of interposing the interphase insulating paper includes the step of positioning the interphase insulating paper so that the portion protrudes from between the coils. According to the method for producing the interphase insulating paper configured as described above, the adjacent two-phase coils can be more reliably prevented from contacting the interphase insulating paper by the portion of the base material in which the pin holes are formed. Can do.

  Preferably, the method for producing the interphase insulating paper includes a step of forming a perforation on the base material along a boundary between the portion and the interphase insulating paper, and a step of interposing the interphase insulating paper with a progressive die processing apparatus. And a step of cutting the interphase insulating paper along the perforation and separating the portion from the interphase insulating paper. According to the method for producing the interphase insulating paper configured as described above, the portion of the base material in which the pin hole is formed can be easily separated from the interphase insulating paper.

  Preferably, the base material is a coil material. In addition, a coil material means the sheet-like raw material wound spirally. According to the method for producing the interphase insulating paper configured as described above, the curved shape of the coil material may remain on the base material during the folding step. In this case, the folding position of the interphase insulating paper is likely to vary. For this reason, the present invention is applied more effectively.

  Preferably, the base material is formed of a resin material. According to the method for producing the interphase insulating paper configured as described above, the rigidity of the interphase insulating paper is low, and the bending position of the interphase insulating paper is likely to vary. For this reason, the present invention is applied more effectively.

  As described above, according to the present invention, it is possible to provide a method for producing an interphase insulating paper that is excellent in production efficiency and can improve shape accuracy.

  Embodiments of the present invention will be described with reference to the drawings. In the drawings referred to below, the same or corresponding members are denoted by the same reference numerals.

(Embodiment 1)
FIG. 1 is a cross-sectional view schematically showing a drive unit mounted on a hybrid vehicle. A hybrid vehicle equipped with the drive unit in FIG. 1 uses an internal combustion engine such as a gasoline engine or a diesel engine and a rechargeable secondary battery (battery) as power sources. First, the structure of the drive unit in FIG. 1 where interphase insulating paper is provided will be described.

  Referring to FIG. 1, the drive unit includes a motor generator 11. The motor generator 11 is a rotating electrical machine having a function as an electric motor or a generator. The motor generator 11 is accommodated in the case 21.

  Motor generator 11 includes a shaft 13, a rotor 25, and a stator 31. The shaft 13 is rotatably supported with respect to the case 21 via the bearing 12. The rotor 25 is fixed to the shaft 13. The shaft 13 rotates around the central axis 101 together with the rotor 25. The stator 31 is fixed to the inner periphery of the case 21. The stator 31 is provided so as to surround the outer periphery of the rotor 25. The shaft 13 is connected to a speed reduction mechanism 14 that includes a plurality of gears.

  Stator 31 includes a stator core 32 and a coil 35 wound around stator core 32. The stator core 32 has a substantially cylindrical shape extending along the central axis 101. The stator core 32 is formed of, for example, a plurality of magnetic steel plates 32A stacked in the direction in which the central shaft 101 extends. The stator core 32 has an end face 32a at one end in the direction in which the central axis 101 extends, and an end face 32b at the other end. The end faces 32a and 32b extend in a plane orthogonal to the central axis 101. The coil 35 is made of, for example, an insulating coated copper wire.

  The coil 35 includes U-phase, V-phase, and W-phase coils. Terminals corresponding to the coils of these phases are connected to a terminal block 17 provided on the case 21. The terminal block 17 is electrically connected to the battery 19 via the inverter 18. The inverter 18 converts the direct current from the battery 19 into an alternating current for driving the motor, and converts the alternating current generated by the regenerative brake into a direct current for charging the battery 19.

  The power output from the motor generator 11 is transmitted from the speed reduction mechanism 14 to the drive shaft receiving portion 16 via the differential mechanism 15. The power transmitted to the drive shaft receiving portion 16 is transmitted as a rotational force to a wheel (not shown) via the drive shaft.

  On the other hand, during regenerative braking of the hybrid vehicle, the wheels are rotated by the inertial force of the vehicle body. The motor generator 11 is driven via the drive shaft receiving portion 16, the differential mechanism 15, and the speed reduction mechanism 14 by the rotational force from the wheels. At this time, the motor generator 11 operates as a generator. The electric power generated by the motor generator 11 is stored in the battery 19 via the inverter 18.

  FIG. 2 is an end view of the motor generator along the line II-II in FIG. In the drawing, the winding structure of the motor generator is schematically shown.

  Referring to FIGS. 1 and 2, the stator core 32 is arranged with a yoke portion 34 that extends annularly around the central shaft 101, and a predetermined interval in the circumferential direction of the yoke portion 34. It is comprised from the some teeth part 33 which protrudes in the radial direction inner side from a surface. A slot portion 36 is defined in a space surrounded by the adjacent tooth portions 33 and the yoke portion 34. The slot portion 36 is opened at a position facing the rotor 25.

  Coil 35 includes a U-phase coil 35U, a V-phase coil 35V, and a W-phase coil 35W. The coil 35 is wound around the stator core 32 by so-called distributed winding. Explaining the form, the U-phase coil 35U, the V-phase coil 35V, and the W-phase coil 35W are provided at a plurality of locations so as to circulate around a plurality of teeth 33 that are continuously arranged in the circumferential direction. Yes. U-phase coil 35U, V-phase coil 35V, and W-phase coil 35W are wound so as to pass over slot portions 36 on both sides of the plurality of tooth portions 33 and end surfaces 32a and 32b. The U-phase coil 35U, the V-phase coil 35V, and the W-phase coil 35W are wound side by side in the order given from the outer peripheral side to the inner peripheral side. The U-phase coil 35U, the V-phase coil 35V, and the W-phase coil 35W are wound around the tooth portion 33 at positions shifted from each other in the circumferential direction.

  A coil end portion 35E is formed by a portion of the coil 35 protruding from the end faces 32a and 32b. The coil end portion 35E is composed of a plurality of bundled coils 35. The coil end portion 35 </ b> E has a ring shape that extends annularly around the central axis 101.

  In the present embodiment, the case where the coil 35 is distributedly wound will be described. However, the present invention is not limited to this, and the coil is intensively wound around the tooth portion for each magnetic pole, so-called concentrated winding. In some cases, the present invention may be applied.

  FIG. 3 is a cross-sectional view showing a coil end portion of the stator in FIG. 2 and 3, in coil end portion 35E, U-phase coil 35U, V-phase coil 35V, and W-phase coil 35W are provided in a mixed manner. Therefore, for the purpose of ensuring insulation between two adjacent phases, the interphase insulating paper 61 is provided between the U-phase coil 35U and the V-phase coil 35V and between the V-phase coil 35V and the W-phase coil 35W, respectively. Is provided.

  FIG. 4 is a diagram illustrating interphase insulating paper disposed at the coil end portion in FIG. 3. Referring to FIG. 4, interphase insulating paper 61 is formed of an insulating sheet member. The interphase insulating paper 61 may be formed from a resin or a hard paper material. In the present embodiment, the interphase insulating paper 61 is made of polyethylene terephthalate resin (PET resin). PET resin is excellent in heat resistance and insulation, and has plasticity and a certain rigidity. The interphase insulating paper 61 may be formed of PEN (polyethylene naphthalate), mica material, Nomex (R), or a sheet having a layer structure combining these. Interphase insulating paper 61 has a thickness of 0.1 mm or more and 1 mm or less, for example.

  The interphase insulating paper 61 includes a plurality of parts, coil end part parts 65m and 65n (hereinafter referred to as a coil end part part 65 unless they are distinguished from each other), and a coil end. Including a slot part 62 connecting between the part part 65m and the coil end part 65n. The interphase insulating paper 61 has a frame shape surrounding the four sides by the coil end part 65 and the slot part 62.

  FIG. 5 is a perspective view showing coil end part parts of the interphase insulating paper in FIG. 4. With reference to FIGS. 4 and 5, the coil end part 65 includes a three-dimensional part 67 and flat parts 66 arranged on both sides of the three-dimensional part 67.

  The flat portion 66 extends on substantially the same plane on both sides of the three-dimensional portion 67. The slot part 62 is bonded to the flat part 66. The three-dimensional part 67 has a shape that is three-dimensionally convex from the flat part 66. The three-dimensional part 67 is formed by bending the coil end part part 65 at an appropriate position. The three-dimensional part 67 is formed by coil-folding and valley-folding the coil end part part 65. The coil end part 65 is formed of a sheet member including a bent portion.

  FIG. 6 is a diagram showing a process of providing the interphase insulating paper in FIG. 4 on the stator core. Referring to FIG. 6, after the U-phase coil 35 </ b> U is wound around the stator core 32, a plurality of interphase insulating papers 61 are provided on the stator core 32 along the central axis 101 in the circumferential direction. At this time, the slot part 62 is inserted into the slot part 36. Coil end part parts 65m and 65n are arranged on end face 32a and end face 32b, respectively. The three-dimensional part 67 is arranged so as to overlap the part of the two adjacent U-phase coils 35U inserted into the slot part 36. The plurality of interphase insulating papers 61 are provided so that the flat portions 66 partially overlap at positions adjacent to each other in the circumferential direction.

  Next, the V-phase coil 35V is wound inside the U-phase coil 35U with the interphase insulating paper 61 interposed. By such a process, the interphase insulating paper 61 is provided so as to be interposed between the U-phase coil 35U and the V-phase coil 35V. By the same process, the interphase insulating paper 61 is provided so as to be interposed between the V-phase coil 35V and the W-phase coil 35W.

  Next, a process for producing the coil end part in FIG. 5 by the method for producing the interphase insulating paper in the present embodiment will be described. FIG. 7 is a side view schematically showing a progressive die processing apparatus used for producing the coil end part in FIG.

  Referring to FIG. 7, the progressive die processing apparatus 110 includes a punching unit 120, a first bending unit 130, a second bending unit 140, and a cutting unit 150 as a plurality of processing units. Including. The plurality of processed parts are arranged at a constant pitch. A resin sheet 71, which is a coil material, is installed in the progressive die processing apparatus 110 and conveyed by one pitch. By sequentially processing the resin sheet 71 at each processing part, the final shape of the coil end part part 65 shown in FIG. 5 is obtained.

  FIG. 8 is a flowchart showing a process of producing the coil end part in FIG. FIG. 9 is a plan view of a resin sheet for explaining the step shown in S100 in FIG. With reference to FIGS. 8 and 9, the resin sheet 71 conveyed on the progressive die processing apparatus 110 is first sent to the punching unit 120. The punching unit 120 performs punching on the resin sheet 71 (S100). Thereby, the pin hole 76 is formed at the same time as the shapes of the coil end part parts 65m and 65n are formed in the resin sheet 71.

  In the present embodiment, coil end part parts 65m and 65n as a plurality of coil end part parts 65 are simultaneously formed on the resin sheet 71. The coil end part 65m and the coil end part 65n are formed side by side in a direction orthogonal to the conveying direction of the resin sheet 71. The coil end part parts 65m and the coil end part parts 65n may be formed side by side in a direction that obliquely intersects the conveying direction of the resin sheet 71. With such a configuration, the productivity of the coil end part 65 can be improved, and the yield of the resin sheet 71 can be improved.

  The resin sheet 71 formed with the coil end part 65 includes a carrier part 73 and bridge parts 74p and 74q. The carrier part 73 extends continuously in the conveying direction of the resin sheet 71. The carrier part 73 is provided on both sides of the coil end part part 65. The carrier part 73 is provided on the periphery of the resin sheet 71. The bridge parts 74p and 74q are connected to the coil end part part 65 and support the coil end part part 65 with respect to the carrier part 73. The bridge part 74 p extends between the coil end part part 65 and the carrier part 73. The bridge part 74q extends between the coil end part part 65m and the coil end part part 65n. A plurality of coil end part parts 65 arranged in the conveying direction of the resin sheet 71 are integrally held by the carrier part 73 and the bridge parts 74p and 74q.

  The pin hole 76 is formed in the bridge portions 74p and 74q. The pin hole 76 is formed in the portion of the resin sheet 71 that is displaced from the coil end part 65. A plurality of pin holes 76 are formed. The plurality of pin holes 76 are formed on both sides of the coil end part 65. The plurality of pin holes 76 are formed side by side in a direction orthogonal to the conveying direction of the resin sheet 71. The plurality of pin holes 76 are formed at positions adjacent to the coil end part 65.

  10 and 11 are cross-sectional views of the progressive die processing apparatus for explaining the process indicated by S200 in FIG. With reference to FIGS. 8, 10, and 11, the resin sheet 71 conveyed on the progressive die processing apparatus 110 is then sent to the first folding processing unit 130. In the 1st bending process part 130, a bending process is implemented with respect to the coil end part part 65 shape | molded by the punching process part 120 (S200).

  The first bending section 130 includes a lower mold 133 and an upper mold 131 having pins 132. The upper die 131 descends and presses the coil end part 65. At this time, the pin 132 is inserted into the pin hole 76. In this state, the lower mold 133 moves up while lifting the peripheral edge of the coil end part 65. Thereby, the predetermined position of the coil end part part 65 is valley-folded.

  In the present embodiment, by inserting the pin 132 into the pin hole 76, the position of the coil end part part 65 with respect to the first bending part 130 is set with reference to the pin hole 76. Thereby, at the time of a bending process, the position of the coil end part part 65 with respect to the 1st bending process part 130 can be kept constant, and it can prevent that the position which performs a bending process on the coil end part part 65 varies between parts.

  The structure of the punching portion 130 shown in FIGS. 10 and 11 is an example, and may be appropriately changed in consideration of the bending position and the bending direction of the coil end part 65.

  FIG. 12 is a view of a resin sheet for explaining the steps shown in S200 and S300 in FIG. FIG. 12A is a plan view, and FIG. 12B is a perspective view. With reference to FIG. 8 and FIG. 12, the resin sheet 71 conveyed on the progressive die processing apparatus 110 is then sent to the second folding processing unit 140. In the second bending section 140, another bending process is performed on the coil end part 65 that has been bent by the first bending section 130 (S300). Similar to the folding process in S200, the predetermined position of the coil end part 65 is mountain-folded with the pin hole 76 as a reference. Through the steps shown in S200 and S300, a planar portion 66 and a three-dimensional portion 67 are formed in the coil end part 65.

  In the present embodiment, the first fold processing unit 130 and the second fold processing unit 140 that respectively perform valley fold and mountain fold on the coil end part part 65 are provided separately. May be.

  With reference to FIG. 8, the resin sheet 71 conveyed on the progressive die processing apparatus 110 is then sent to the cutting processing unit 150. In the cutting part 150, the resin sheet 71 is cut along the boundary between the bridge part 74p and the coil end part 65, and the coil end part 65 is separated from the resin sheet 71 (S400). The coil end part 65 in FIG. 5 is obtained by the above process.

  The method for producing the interphase insulating paper according to the first embodiment of the present invention is a method for producing the interphase insulating paper that is the coil 35 wound around the stator core 32 and insulates between the adjacent two-phase coils 35. The method for producing the interphase insulating paper includes a step of installing a resin sheet 71 as a base material on the progressive die processing apparatus 110, a step of forming pin holes 76 in the resin sheet 71 (S100), and punching the resin sheet 71 The step (S100) of forming the coil end part 65 as the interphase insulating paper on the resin sheet 71, the step of bending the coil end part 65 based on the pin hole 76 (S200, S300), and the coil end part A step (S400) of separating the coil end part 65, which has been subjected to the step of bending the part 65 (S200, S300), from the resin sheet 71.

  According to the method for producing the interphase insulating paper in the first embodiment of the present invention configured as described above, the step of bending the coil end part part 65 in the state molded into the resin sheet 71 by the progressive die processing apparatus 110. To implement. Thereby, compared with the case where a bending process is implemented to each of the coil end part parts 65 cut | disconnected from the resin sheet 71, the productivity of the coil end part parts 65 can be improved.

  Moreover, the shape accuracy of the coil end part 65 can be improved by performing the bending process with the pin hole 76 as a reference. In particular, in the present embodiment, since the resin sheet 71 forming the coil end part 65 is a coil material, a curl shape may remain in the coil end part 65 during the bending process. Further, the resin sheet 71 made of a resin material is softer than a metal sheet. For these reasons, the folding position of the coil end part 65 is likely to vary during the folding process shown in S200 and S300. For this reason, in this Embodiment, the effect which improves the shape precision of the coil end part part 65 can be acquired more effectively.

  In the present embodiment, the case where the present invention is applied to the production of the coil end part 65 has been described, but the present invention is not limited to this. For example, when the coil end part 65 in FIG. 5 is formed by bonding the flat part 66 and the three-dimensional part 67, the present invention may be applied to the production of the three-dimensional part 67.

(Embodiment 2)
FIG. 13 is a flowchart showing the steps of the method for producing the interphase insulating paper in the second embodiment of the present invention. The method for producing the interphase insulating paper in the present embodiment basically includes the same steps as the method for producing the interphase insulating paper in the first embodiment. Hereinafter, description is not repeated about the overlapping process.

  Referring to FIG. 13, in the present embodiment, a pin hole processing part for forming pin hole 76 in resin sheet 71 and a punching processing part for forming coil end part part 65 in resin sheet 71 are progressively formed. The processing device 110 is provided separately. That is, in the present embodiment, first, the pin hole 76 is formed in the resin sheet 71 (S110). The coil end part 65 is formed in the resin sheet 71 in which the pin hole 76 is formed (S120). At this time, a punching process may be performed on the resin sheet 71 on the basis of the pin holes 76 as in the bending process of S200 and S300 in the first embodiment. In this case, since the positional relationship between the pin hole 76 and the coil end part part 65 can be kept constant, the shape accuracy of the coil end part part 65 can be further improved.

  According to the method for producing the interphase insulating paper in the second embodiment of the present invention configured as described above, the same effects as those described in the first embodiment can be obtained.

  Note that the pin hole forming step shown in S110 in FIG. 13 and the punching step shown in S120 may be performed before and after.

(Embodiment 3)
FIG. 14 is a flowchart showing the steps of the method for producing interphase insulating paper according to Embodiment 3 of the present invention. The method for producing the interphase insulating paper in the present embodiment basically includes the same steps as the method for producing the interphase insulating paper in the first embodiment. Hereinafter, description is not repeated about the overlapping process.

  FIG. 15 is a plan view of a resin sheet for explaining the step shown in S100 in FIG. FIG. 15 is a diagram corresponding to FIG. 9 in the first embodiment. 14 and 15, in the present embodiment, in the step shown in S100, the shape of the coil end part 65 is formed in the resin sheet 71 to form the pin hole 76, and at the same time, the bridge part 74p and the coil are formed. A perforation 91 is formed along the boundary with the end part part 65. The perforation 91 is a hole extending in a dotted line shape.

  FIG. 16 is a perspective view of coil end part parts for explaining the step shown in S400 in FIG. Referring to FIGS. 14 to 16, in step S <b> 400, resin sheet 71 is cut so that bridge portion 74 p remains on coil end part 65, and coil end part 65 is separated from resin sheet 71. . The bridge portion 74p is a portion of the resin sheet 71 in which the pin holes 76 are formed. By these steps, the coil end part 65 in FIG. 16 is obtained.

  FIG. 17 is a cross-sectional view of the coil end portion for explaining the processes shown in S500 to S700 in FIG. Referring to FIGS. 14 and 17, after the step shown in S400, U-phase coil 35U, V-phase coil 35V and W-phase coil 35W are sequentially placed in the stator core while coil end part 65 is interposed between two adjacent phases. It is wound around 32 (S500). At this time, the coil end part 65 is positioned so that the bridge part 74p left on the coil end part 65 protrudes between the adjacent two-phase coils 35.

  Next, the coil end portion 35E is formed by pressing the portion of the coil 35 protruding from the end face 32a of the stator core 32 (S600). In the present embodiment, since the bridge portion 74p is provided so as to protrude from between the adjacent two-phase coils 35, the adjacent two-phase coil 35 is formed into the coil end portion part 65 when the coil end portion 35E is formed. It is possible to prevent contact over the road.

  Next, the coil end part 65 is cut along the perforation 91, and the bridge part 74p is cut off from the coil end part 65 (S700).

  According to the method for producing the interphase insulating paper in the third embodiment of the present invention configured as described above, the same effects as those described in the first embodiment can be obtained. In addition, in the present embodiment, bridge portion 74p exhibits a function of preventing a short circuit between adjacent two-phase coils 35, so that the reliability of motor generator 11 can be improved.

  Note that the method for producing the interphase insulating paper in the present embodiment may be combined with the method for producing the interphase insulating paper in the second embodiment. Further, the perforation 91 may be formed by a processing part different from the formation of the pin hole 76 and the molding of the coil end part 65. Alternatively, the perforation 91 may not be formed in the resin sheet 71, and the coil end part 65 may be bent along the boundary between the bridge part 74p and the coil end part 65 after the step shown in S600.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is sectional drawing which represents typically the drive unit mounted in a hybrid vehicle. FIG. 2 is an end view of the motor generator along the line II-II in FIG. 1. It is sectional drawing which shows the coil end part of the stator in FIG. It is a figure which shows the phase insulation paper arrange | positioned by the coil end part in FIG. It is a perspective view which shows the coil end part parts of the phase insulation paper in FIG. It is a figure which shows the process of providing the interphase insulation paper in FIG. 4 in a stator core. It is a side view which represents typically the progressive type processing apparatus used for preparation of the coil end part parts in FIG. It is a flowchart figure which shows the process of producing the coil end part parts in FIG. It is a top view of the resin sheet for demonstrating the process shown to S100 in FIG. It is sectional drawing of the progressive die processing apparatus for demonstrating the first half part of the process shown to S200 in FIG. It is sectional drawing of the progressive die processing apparatus for demonstrating the latter half part of the process shown to S200 in FIG. It is a figure of the resin sheet for demonstrating the process shown to S200 and S300 in FIG. It is a flowchart figure which shows the process of the manufacturing method of the phase insulation paper in Embodiment 2 of this invention. It is a flowchart figure which shows the process of the manufacturing method of the phase insulation paper in Embodiment 3 of this invention. It is a top view of the resin sheet for demonstrating the process shown to S100 in FIG. It is a perspective view of the coil end part part for demonstrating the process shown to S400 in FIG. It is sectional drawing of the coil end part for demonstrating the process shown to S700 in FIG.

Explanation of symbols

  32 Stator cores, 35 coils, 61 interphase insulating paper, 65, 65 m, 65 n coil end part parts, 71 resin sheets, 73 carrier parts, 74 p, 74 q bridge parts, 76 pin holes, 91 perforations, 110 Progressive processing machine.

Claims (8)

A coil wound around a stator core, which is a method for producing an interphase insulating paper that insulates between the two adjacent coils.
Installing the base material in a progressive die processing apparatus;
Forming a pin hole in the substrate;
Punching the base material, forming a phase insulating paper on the base material,
Folding the interphase insulating paper with respect to the pin hole;
A method for producing an interphase insulating paper, comprising: a step of separating the interphase insulating paper subjected to the step of bending the interphase insulating paper from the base material.   The method for producing an interphase insulating paper according to claim 1, wherein the step of forming the interphase insulating paper includes a step of punching the base material based on the pin holes.   The method for producing an interphase insulating paper according to claim 1 or 2, wherein the step of forming the pin hole and the step of forming the interphase insulating paper are performed in the same step of the progressive die processing apparatus. The base material on which the interphase insulating paper is molded is connected to the carrier portion extending continuously in the feeding direction of the progressive die processing apparatus and the interphase insulating paper, and the interphase insulating paper is connected to the carrier portion. A supporting bridge part,
4. The method for producing interphase insulating paper according to claim 1, wherein the step of forming the pin hole includes a step of forming the pin hole in the bridge portion. 5. The step of separating the interphase insulating paper includes a step of separating the interphase insulating paper from the base material so that a portion of the base material in which the pin holes are formed is left on the interphase insulating paper,
After the step of separating the interphase insulating paper, comprising the step of interposing the interphase insulating paper between the two adjacent coils of the phase,
5. The production of the interphase insulating paper according to claim 1, wherein the step of interposing the interphase insulating paper includes the step of positioning the interphase insulating paper such that the portion protrudes from between the coils. Method. Forming a perforation in the base material along the boundary between the portion and the interphase insulating paper by the progressive die processing apparatus;
The interphase insulating paper according to claim 5, further comprising a step of cutting the interphase insulating paper along the perforation and separating the portion from the interphase insulating paper after the step of interposing the interphase insulating paper. Manufacturing method.   The method for producing interphase insulating paper according to any one of claims 1 to 6, wherein the base material is a coil material.   The method for producing an interphase insulating paper according to any one of claims 1 to 7, wherein the base material is formed of a resin material.

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