JP2006280157A - Interphase insulator and interphase insulation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin-made interphase insulator which can be automatically assembled, improved in windability and also can be simplified in processing terminal wire of a coil. <P>SOLUTION: The interphase insulator 10 includes an insulator 11 insulating between U-V phases by covering the coil end of a U-phase coil 51U, a projector 12 formed projecting and tilting toward the inner peripheral side of the stator core from the insulator 11 and covering the base of the U-phase coil end, and a leg 13 formed on the stator core side end of the projector 12 and fitted in between the bases of the adjacent U-phase coil end. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an interphase insulator and an interphase insulation method for insulating between phase coil ends of a stator. In particular, it is suitable for use in a vehicle motor such as an electric vehicle or a hybrid vehicle.

  In the motor stator, interphase insulating paper is inserted between the coil phases in order to provide an insulation distance between the different phase coils (to ensure insulation performance). For example, in a three-phase motor, interphase insulating paper is inserted between the U phase and the V phase, and between the V phase and the W phase.

  However, such interphase insulating paper has a poor yield when it is necessary to process the paper into a predetermined shape or when the shape is complicated. Moreover, since the material is soft because it is paper, it is difficult to handle at the time of assembling, and after the assembling, misalignment or winding into the coil is likely to occur when winding the next phase coil. For this reason, it has been proposed to use an interphase insulator of a resin molded product instead of an interphase insulating paper (Patent Document 1).

JP 2001-251797 A

  However, since it is difficult to automatically assemble resin molded products (interphase insulators), it is necessary to mount the interphase insulators manually, and there is a problem that the productivity of the stator is low.

  Here, the coil already wound around the slot of the stator core is soft and easily deformed. When a resin-made interphase insulator molded according to the coil shape is assembled to such a coil, it is very difficult to position and fix the interphase insulator because the shape of the coil is unstable. . For this reason, after the interphase insulator is assembled, the arrangement position (winding position) of the next phase coil is not determined, and there is a problem that the winding property is poor.

  Further, since the stator is provided with a plurality of coils, and the coil terminal wires are soft and the shape is unstable, it is necessary to process these terminal wires (fixing, connection, etc.). For this reason, in the coil terminal wire wiring process, the wiring is performed after fixing by the lacing process, but the work is complicated. In the connection process, it is conceivable to use a connection terminal (bus bar). However, in that case, the bus bar cannot be used because the bus bar cannot be fixed by a conventional interphase insulator.

  Therefore, the present invention has been made to solve any of the above-described problems, and it is an object to provide a resin-made interphase insulator that can be automatically assembled and can improve winding performance. To do. Another object of the present invention is to provide a resin-made interphase insulator capable of simplifying the terminal wire processing of the coil. Furthermore, this invention makes it a subject to provide the interphase insulation method which can aim at the improvement of winding property.

  The interphase insulator according to the present invention, which has been made to solve the above problems, is a resin that insulates each phase coil at the coil end portion protruding from both end faces of the stator core among the coils wound around the slots of the stator core. In the interphase insulator, an insulating portion that covers the coil end portion and insulates between the phase coils, and is formed so as to protrude and incline from the insulating portion toward the inner peripheral side of the stator core. It has a convex part which covers the base of a part, and a leg part with which it attaches between the roots of the common phase coil end part which is formed in the stator core side end part of the convex part, and adjoins.

  In this interphase insulator, when the stator core is mounted, most of the coil end portion is covered with the insulating portion, and the root of the coil end portion is covered with the convex portion, so that the coil end portion is reliably insulated. . And when it mounts | wears with a stator core, since a leg part goes in between the roots of the adjacent in-phase coil end part, it is positioned and fixed firmly. Therefore, when this interphase insulator is used, the winding position of the next phase coil is determined, and the next phase coil can be accurately wound, so that the winding property is very good.

  Moreover, since this interphase insulator is provided with a leg portion at the end of the convex portion on the stator side, the leg portion can be held by an assembling facility. Thereby, this interphase insulator can be automatically assembled by an assembly facility.

  In the interphase insulator according to the present invention, the leg portion has a height at which a bottom surface thereof comes into contact with an end surface of the stator core, and the bottom surface is formed smoothly so as to be attached to the stator core. Is desirable.

  By doing so, when the interphase insulator is mounted on the stator core, the bottom surface of the leg is attached to the end surface of the stator core, so that the interphase insulator can be positioned in the stator axial direction. That is, the height of the interphase insulator attached to the stator core can be made constant.

  Moreover, in the interphase insulator which concerns on this invention, it is desirable to further have a coil holding | maintenance part which protrudes toward the inner peripheral side of the said stator core, and hold | maintains a next phase coil.

  By having such a coil holding part, the winding position of the coil is determined, the arrangement and shape of the coil can be adjusted, and the winding property is improved. Further, since the coil can be wound around the predetermined position without slack, it is possible to reliably avoid the coil from crossing or covering another slot.

  Further, in the interphase insulator according to the present invention, it is desirable that a position shift prevention portion for preventing a position shift of the next phase coil is formed in the coil holding portion.

  Thereby, since the positional deviation of the coil in the middle of winding is reliably prevented, the arrangement and shape of the coil can be surely adjusted, and the winding property is further improved. Further, since the coil can be wound around the predetermined position without slack, it is possible to more reliably avoid the coil from crossing or covering another slot.

  In the interphase insulator according to the present invention, it is preferable that the circumferential length of the insulating portion is an integral multiple of the width of a coil wound around the slot.

  By doing so, the interphase insulator can be mounted on the entire circumference of the stator core without any gaps, so that each coil can be covered with the interphase insulator. Thereby, the interphase insulation of each phase coil end part can be ensured firmly.

  Moreover, in the interphase insulator which concerns on this invention, it is desirable to form the assembly part for assembling other components in the edge part of the said insulation part.

By forming such an assembly portion, other components (for example, connection terminals) can be easily assembled and fixed to the interphase insulator. Thereby, since a connection terminal (bus bar) etc. can be assembled | attached, the wiring process of a coil terminal wire can be simplified and a coil end dimension can also be made small.
In addition, as an assembly | attachment part, a fitting hole, an engagement piece, or a notch can be mentioned, for example.

  The interphase insulation method according to the present invention, which has been made to solve the above-described problems, includes the above-described interphase insulator in a circumferential direction at coil end portions protruding from both end faces of the stator core among coils wound around slots of the stator core. Are mounted side by side, and then the interphase insulators are mounted side by side in the circumferential direction on the coil end portion formed by winding the next phase coil around a predetermined slot of the stator core to insulate the phases of the phase coil end portions from each other. It is characterized by that.

  In this interphase insulation method, the interphase insulators described above are mounted in the circumferential direction on the coil end portion of a coil already wound around the stator core slot. At this time, the interphase insulator mounted on the stator core is firmly positioned and fixed. In such a state, the next phase coil is wound around a predetermined slot. At this time, since the interphase insulator attached to the stator core does not shift, the next phase coil can be tightly wound. That is, the winding property is improved.

  Thereafter, the interphase insulators described above are mounted in the circumferential direction on the coil end portion of the next phase coil wound around the slot. As a result, the interphase insulator is interposed between the coil phases without any gap, so that the interphase insulation of each phase coil end portion is securely secured.

  According to the interphase insulator according to the present invention, as described above, automatic assembly can be performed and winding performance can be improved. Moreover, simplification of the terminal line process of a coil can be achieved. In addition, according to the interphase insulation method of the present invention, it is possible to improve the winding property as described above.

  BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a most preferred embodiment that embodies an interphase insulator and an interphase insulation method of the present invention will be described in detail with reference to the drawings. In the present embodiment, the present invention is applied to a stator used in a motor for driving a hybrid vehicle distributedly wound by a direct winding method.

  First, a schematic configuration of the stator according to the present embodiment is shown in FIG. FIG. 1 is a perspective view showing a schematic configuration of the stator 50. As shown in FIG. 1, stator 50 according to the present embodiment is a three-phase stator including U-phase coil 51U, V-phase coil 51V, and W-phase coil 51W. The stator 50 includes a stator core 52, three-phase coils 51U, 51V, 51W disposed on the stator core 52, an interphase insulator 10 disposed between the U-phase and the V-phase, and a V-phase-W phase. An interphase insulator 30 provided, a terminal lead-out connection terminal (bus bar) 54 with a holder, and a neutral point bus bar 55 with a holder are provided. Details of the interphase insulators 10 and 30 will be described later.

  Here, the stator core 52 has an annular shape formed by laminating and integrally bonding a plurality of steel plates. A plurality of slots 53 for winding (disposing) the phase coils 51U, 51V, 51W are formed on the inner peripheral surface of the stator core 52 at predetermined intervals, as shown in FIG. . On the other hand, the coils 51U, 51V, 51W of each phase are formed by winding a large number of enamel wires. The coils 51U, 51V, 51W of each phase are directly wound around a predetermined slot (so-called direct winding method). The V-phase coil 51V is wound after the interphase insulator 10 is disposed, and the W-phase coil 51W is wound after the interphase insulator 30 is disposed.

  Next, the interphase insulator according to the present embodiment will be described with reference to FIGS. FIG. 2 is a perspective view of the interphase insulator 10 as viewed from the inside of the stator core. FIG. 3 is a perspective view of the interphase insulator 10 as seen from the outside of the stator core. FIG. 4 is a perspective view of the interphase insulator 30 as viewed from the inside of the stator core. FIG. 5 is a perspective view of the interphase insulator 30 as seen from the outside of the stator core.

  First, the interphase insulator 10 disposed between the U-phase coil 51U and the V-phase coil 51V will be described. As shown in FIGS. 2 and 3, the interphase insulator 10 is a resin molded product formed into a shape that follows the U-phase coil 51 </ b> U wound around the slot 53 of the stator core 52. As the material of the interphase insulator 10, it is preferable to use an engineering plastic (or super engineering plastic) such as nylon resin, PET, PPS or the like. This is because a hybrid vehicle driving motor is used at a higher temperature than other motors.

  The interphase insulator 10 includes an insulating portion 11 for covering the coil end portion of the U-phase coil 51U, and a U-phase coil formed so as to protrude from the insulating portion 11 toward the inner peripheral side of the stator core and to be inclined. The convex part 12 which covers the base of the coil end part of 51U is provided. The circumferential length of the insulating portion 11 is one coil width of the V-phase coil 51V. When such an interphase insulator 10 is disposed on the stator core 52 around which the U-phase coil 51U is wound, the coil end portion of the U-phase coil 51U is covered with the interphase insulator 10, and the U-phase coil 51U and the V-phase coil are covered. Interphase insulation with 51V is secured.

  And the leg part 13 with which the stator core side edge part (FIG. 2 and FIG. 3 lower end part) of the convex part 12 is mounted | worn between the roots of the coil end part of adjacent U-phase coil 51U and 51U is formed. . The stator core outer peripheral side end of the leg 13 is formed in a tapered shape. Thereby, mounting | wearing of the leg part 13 between the roots of the coil end part of adjacent U-phase coil 51U and 51U can be performed smoothly. Further, since the leg portion 13 enters between the roots of the coil end portions of the adjacent U-phase coils 51U and 51U, the interphase insulator 10 is positioned and firmly fixed when the leg portion 13 is fixed. It has become.

  The leg 13 has a height at which the bottom surface 13 a contacts the end surface of the stator core 52 when the leg 13 is attached to the stator core 52. That is, the height (length in the stator axial direction) of the leg portion 13 is set higher than the height (thickness) of the cuff. The bottom surface 13 a of the leg portion 13 is formed smoothly so as to be attached to the end surface of the stator core 52. Thus, when the interphase insulator 10 is mounted on the stator core 52, alignment in the stator axial direction can be performed. Further, since the leg portion 13 is provided, as will be described later, the leg portion 13 can be gripped by the assembling equipment and can be automatically assembled by the assembling equipment.

  Further, the insulating portion 11 includes a coil holding portion 14 that protrudes toward the inner peripheral side of the stator core and holds the V-phase coil 51V. The coil holding part 14 is formed with a protrusion (position deviation prevention part) 15 for preventing the position deviation of the V-phase coil 51V. As a result, the holding groove 16 is formed in the coil holding portion 14. For this reason, since the V-phase coil 51V in the middle of winding fits in the coil holding groove 16 and is not displaced, the arrangement and shape of the V-phase coil 51V can be reliably adjusted. Further, since the V-phase coil 51V can be wound around the predetermined position without slack, the V-phase coil can be reliably prevented from crossing or covering other slots.

  Next, the interphase insulator 30 disposed between the V-phase coil 51V and the W-phase coil 51W will be described. As shown in FIGS. 4 and 5, the interphase insulator 30 is a resin molded product formed into a shape that follows the V-phase coil 51 </ b> V wound around the slot 53 of the stator core 52. As the material of the interphase insulator 30, like the interphase insulator 10, an engineering plus chip (or super engineering plastic) such as nylon resin, PET, or PPS is preferably used.

  The interphase insulator 30 includes an insulating portion 31 for covering the coil end portion of the V-phase coil 51V, and a V-phase coil formed so as to protrude from the insulating portion 31 toward the inner peripheral side of the stator core and to be inclined. And a convex portion 32 that covers the base of the 51V coil end portion. The circumferential length of the insulating portion 31 is one coil width of the W-phase coil 51W. When such an interphase insulator 30 is disposed on the stator core 52 around which the V phase coil 51V is wound, the coil end portion of the V phase coil 51V is covered with the interphase insulator 30, and the V phase coil 51V and the W phase coil are covered. Interphase insulation with 51W is secured.

  And the leg part 33 with which it mounts between the roots of the coil end part of adjacent V phase coil 51V, 51V is formed in the stator core side edge part (FIG. 4 and FIG. 5 lower end part) of the convex part 32. As shown in FIG. . The stator core outer peripheral side end portion of the leg portion 33 is formed in a tapered shape. Thereby, mounting | wearing of the leg part 33 between the roots of the coil end part of adjacent V-phase coil 51V, 51V can be performed smoothly. Further, since the leg portion 33 enters between the roots of the coil end portions of the adjacent V-phase coils 51V and 51V, the interphase insulator 30 is positioned and firmly fixed by fixing the leg portion 33. It has become.

  The leg portion 33 has a height at which the bottom surface 33 a contacts the end surface of the stator core 52 when the leg portion 33 is attached to the stator core 52. That is, the height of the leg 33 (length in the stator axial direction) is set higher than the height (thickness) of the cuff. The bottom surface 33 a of the leg portion 33 is smoothly formed so as to be attached to the end surface of the stator core 52. Thus, when the interphase insulator 30 is mounted on the stator core 52, alignment in the stator axial direction can be performed. Further, by providing the leg portion 33, as will be described later, the leg portion 33 can be gripped by the assembling equipment and can be automatically assembled by the assembling equipment.

  The insulating portion 31 includes a coil holding portion 34 that protrudes toward the inner peripheral side of the stator core and holds the W-phase coil 51W. The coil holding part 34 is formed with a notch 36 to prevent the positional deviation of the W-phase coil 51W. As a result, the W-phase coil 51W in the middle of winding is accommodated in the notch 36 and is not displaced, so that the arrangement and shape of the W-phase coil 51W can be reliably adjusted. Further, the W-phase coil 51W can be wound around the predetermined position without slack.

  Further, three fitting holes 37 are provided at the end portion of the insulating portion 31 opposite to the leg portion 33 (the upper end portion in FIGS. 4 and 5). The fitting hole 37 is for attaching the connection terminals (bus bars) 54 and 55, and corresponds to the “component attachment portion” of the present invention. As described above, since the fitting hole 37 is provided in the insulating portion 31, the bus bar 54, by fitting the protrusion 56 (see FIG. 12) provided in the bus bar 54, 55 into each fitting hole 37. 55 can be easily attached to the interphase insulator 30.

  Next, an operation of assembling the stator 50 using the interphase insulators 10 and 30 having the above-described configuration will be described with reference to FIGS. FIG. 6 is an illustration showing a state in which the interphase insulator 10 is disposed on the stator core 52 after the U-phase coil 51U is wound. FIG. 7 is an explanatory view showing a state in which the interphase insulator 10 (30) is automatically assembled to the stator core 52. FIG. FIG. 8 is an explanatory view showing a state in which the V-phase coil 51 </ b> V is wound after the interphase insulator 10 is disposed on the stator core 52. FIG. 9 is an explanatory diagram showing a state in which the interphase insulator 30 is disposed on the stator core 52 after the V-phase coil 51V is wound. FIG. 10 is an explanatory diagram showing a state in which the W-phase coil 51 </ b> W is wound after the interphase insulator 30 is disposed on the stator core 52. FIG. 11 is a perspective view showing a schematic configuration of the stator 50 before the coil terminal wire is processed (a bus bar is attached). FIG. 12 is a cross-sectional view of the stator 50 in a state in which the bus bar 54 (55) is attached to the interphase insulator 30. FIG.

  First, an enameled wire constituting the U-phase coil 51U is directly wound around a predetermined slot 53 by a known method, and the U-phase coil 51U is attached to the stator core 52 as shown in FIG. Next, the interphase insulator 10 is assembled. Specifically, as shown in FIG. 7, the assembly is automatically assembled to the stator core 52 in a state where the legs 13 are gripped by the assembly jig 40. At this time, the leg portion 13 is inserted between the roots of the coil end portions of the adjacent U-phase coils 51U and 51U.

  Here, since the insertion side end portion of the leg portion 13 is tapered, it can be reliably and smoothly inserted between the roots of the coil end portions of the adjacent U-phase coils 51U and 51U. Further, since the leg portion 13 enters between the roots of the coil end portions of the adjacent U-phase coils 51U and 51U, the interphase insulator 10 is positioned and firmly fixed. Furthermore, since the bottom surface 13a of the leg portion 13 is formed so as to be in contact with the end surface of the stator core 52, alignment can be performed also in the stator axial direction. That is, the height of each interphase insulator 10 is uniform in the state assembled to the stator core 52.

  In this way, the interphase insulator 10 is automatically assembled by the assembly jig 40 sequentially in the circumferential direction (see FIG. 6). Here, since the circumferential length of the interphase insulator 10 is one coil width, when all the interphase insulators 10 are assembled, the interphase insulators 10 are assembled to the entire circumference of the stator core 52 without a gap. Thereby, the U-phase coil 51 </ b> U is obscured by the interphase insulator 10.

  When the assembly of the interphase insulator 10 is completed, as shown in FIG. 8, the enameled wire constituting the V-phase coil 51V, which is the next phase coil, is directly wound around the predetermined slot 53 by a known method. At this time, the enamel wire is wound so as to be caught by the convex portion 12 and the coil holding portion 14 of the interphase insulator 10. And since the interphase insulator 10 is firmly fixed at the time of winding, the position of the interphase insulator 10 does not shift. Further, since the enameled wire that is wound directly to form the V-phase coil 51V is accommodated in the holding groove 16 formed in the coil holding portion 14, it is not misaligned. For this reason, since the V-phase coil 51V can be wound around the predetermined position without slack, it is possible to reliably avoid the V-phase coil 51V from crossing or covering another slot. Furthermore, as described above, since the arrangement height of each interphase insulator 10 is constant, the arrangement position and shape of each formed V-phase coil 51V are adjusted. Thus, by using the interphase insulator 10, the winding property of the V-phase coil 51V can be improved.

  Next, when the V-phase coil 51V is attached to the starter core 52, the interphase insulator 30 is assembled to the stator core 52 as shown in FIG. The assembly of the interphase insulator 30 is automatically performed by the assembly jig 40 as in the interphase insulator 10. At this time, the leg portion 33 is inserted between the roots of the coil end portions of the adjacent V-phase coils 51V and 51V. Since the insertion side end of the leg portion 33 is tapered, it can be reliably and smoothly inserted between the roots of the coil end portions of the adjacent V-phase coils 51V and 51V. Further, since the leg portion 33 enters between the roots of the coil end portions of the adjacent V-phase coils 51V and 51V, the interphase insulator 30 is positioned and firmly fixed. Further, since the bottom surface 33a of the leg portion 33 is formed so as to be in contact with the end surface of the stator core 52, alignment can be performed also in the stator axial direction. That is, the height of each interphase insulator 30 is aligned in the state assembled to the stator core 52.

  In this manner, the interphase insulator 30 is automatically assembled by the assembly jig 40 sequentially in the circumferential direction. Here, since the circumferential length of the interphase insulator 30 is one coil width, when all the interphase insulators 30 are assembled, the interphase insulators 30 are assembled to the entire circumference of the stator core 52 without a gap. Thereby, the V-phase coil 51 </ b> V is obscured by the interphase insulator 30.

  When the assembly of the interphase insulator 30 is completed, the enameled wire constituting the W-phase coil 51W, which is the next phase coil, is directly wound around the predetermined slot 53 by a known method, as shown in FIG. At this time, the enamel wire is wound so as to be caught by the convex portion 32 and the coil holding portion 34 of the interphase insulator 30. And since the interphase insulator 30 is firmly fixed at the time of winding, the position of the interphase insulator 30 does not shift. In addition, the enameled wire that is directly wound to form the W-phase coil 51W is caught by the notch 36 formed in the coil holding portion 34 and is not displaced. For this reason, the W-phase coil 51W can be wound around the predetermined position without slack. Furthermore, as described above, since the arrangement height of each interphase insulator 30 is constant, the arrangement position and shape of each formed W-phase coil 51W are adjusted. Thus, by using the interphase insulator 30, the winding property of the W-phase coil 51W can be improved.

  When the three-phase coils 51U, 51V, 51W are thus wound around the stator core 52 and the interphase insulators 10, 30 are disposed, as shown in FIG. 11, the interphase insulator 10 becomes the U-phase coil 51U. And the V-phase coil 51V are interposed with no gap, and the interphase insulator 30 is interposed between the V-phase coil 51V and the W-phase coil 51W without a gap. Thereby, the U-phase coil 51U and the V-phase coil 51V do not contact each other, and the interphase insulation between the U-phase coil 51U and the V-phase coil 51V can be ensured. Further, the V-phase coil 51V and the W-phase coil 51W are not in contact with each other, and the interphase insulation between the V-phase coil 51V and the W-phase coil 51W can be ensured.

  Thereafter, as shown in FIG. 12, the fitting protrusions 56 of the bus bars 54 and 55 are fitted into the fitting holes 37 formed in the interphase insulator 30, and the bus bars 54 and 55 are attached to the interphase insulator 30. The coil terminal wire is processed. Thus, the stator 50 shown in FIG. 1 is completed. Since the coil terminal wire is treated in this way, it is not necessary to perform a complicated lacing process as in the prior art, so that the coil terminal line process can be simplified.

  As described above in detail, when the interphase insulators 10 and 30 according to the present embodiment are attached to the stator core 52, the leg portions 13 and 33 are attached so as to enter between the roots of adjacent in-phase coil end portions. Therefore, it is positioned and firmly fixed. Further, the leg portions 13 and 33 have a height at which the bottom surfaces 13 a and 33 a come into contact with the end surface of the stator core 52, and the bottom surfaces 13 a and 33 a are smoothly formed so as to be attached to the stator core 52. For this reason, the interphase insulators 10 and 30 are positioned also in the stator axial direction, and the height of the interphase insulators 10 and 30 is constant. Furthermore, the interphase insulators 10 and 30 include coil holding portions 14 and 34. From these facts, by using the interphase insulators 10, 30, the winding position of the next phase coil is determined, and the arrangement and shape of the next phase coil can be adjusted. That is, the winding property of the coil can be improved.

  Moreover, since the fitting hole 37 for attaching the bus bars 54 and 55 is formed in the interphase insulator 30, the bus bars 54 and 55 can be easily attached. For this reason, the wiring process of a coil terminal line can be simplified.

  It should be noted that the above-described embodiment is merely an example and does not limit the present invention in any way, and various improvements and modifications can be made without departing from the scope of the invention. For example, instead of forming the fitting hole 37 in the interphase insulator 30, an engagement piece 38 may be formed as shown in FIG. In this case, it is necessary to form the engaging recess 38 in the bus bars 54 and 55 instead of the fitting protrusion 56. Even in this case, the bus bars 54 and 55 can be attached to the interphase insulator 30.

  In the above-described embodiment, the present invention is applied to a motor for driving a hybrid vehicle. However, the present invention is not limited to a motor for an automobile, and any type of distributed winding using a direct winding system is used. It can be applied to motors used for applications.

It is a perspective view which shows schematic structure of the stator which concerns on embodiment. It is the perspective view seen from the stator core inside of the interphase insulator (between U-V phases). It is the perspective view seen from the stator core outer side of the interphase insulator (between U-V phases). It is the perspective view seen from the stator core inner side of the interphase insulator (between V-W phases). It is the perspective view seen from the stator core outer side of the interphase insulator (between V-W phases). It is description which shows the state which arrange | positioned the interphase insulator (between U-V phases) in the stator core after winding the U-phase coil. It is explanatory drawing which shows a mode that an interphase insulator is assembled | attached automatically with respect to a stator core. It is explanatory drawing which shows the state which wound the V phase coil, after arrange | positioning an interphase insulator (between U-V phases) to a stator core. It is description which shows the state which arrange | positioned the interphase insulator (between V-W phases) to the stator core after winding the V-phase coil. It is explanatory drawing which shows the state which wound the W phase coil, after arrange | positioning an interphase insulator (between V-W phases) to a stator core. It is a perspective view which shows schematic structure of the stator before performing a process of a coil terminal wire. It is sectional drawing of the stator in the state which attached the bus bar to the interphase insulator. It is sectional drawing which shows the modification of an interphase insulator.

Explanation of symbols

10 Interphase insulator (between U and V phases)
DESCRIPTION OF SYMBOLS 11 Insulation part 12 Protrusion part 13 Leg part 13a Bottom face 14 of a leg part Coil holding part 15 Protrusion 16 Holding groove 30 Interphase insulator (between V-W phases)
31 Insulating part 32 Convex part 33 Leg part 33a Leg bottom surface 34 Coil holding part 36 Notch 37 Fitting hole 50 Stator 51U U-phase coil 51V V-phase coil 51W W-phase coil 52 Stator core 53 Slot 54 Terminal-drawing bus bar with holder 55 Neutral point bus bar with holder

Claims (7)

In a resin phase insulator that insulates each phase coil in the coil end portion protruding from both end faces of the stator core among the coils wound around the stator core slot,
An insulating portion that covers the coil end portion and insulates between the phase coils;
A convex portion that is formed so as to protrude and incline from the insulating portion toward the inner peripheral side of the stator core, and covers the root of the coil end portion;
Legs formed between the roots of adjacent in-phase coil end portions formed at the end of the convex portion on the stator core side,
An interphase insulator characterized by comprising: In the interphase insulator according to claim 1,
The leg portion has a height at which a bottom surface thereof contacts an end surface of the stator core,
The interphase insulator is characterized in that the bottom surface is formed smoothly so as to be attached to the stator core. In the interphase insulator according to claim 1 or claim 2,
An interphase insulator, further comprising a coil holding portion that protrudes toward an inner peripheral side of the stator core and holds a next phase coil. In the interphase insulator according to claim 3,
The interphase insulator, wherein the coil holding portion is formed with a position shift prevention portion for preventing a position shift of the next phase coil. In any one interphase insulator as described in Claim 1-4,
The interphase insulator is characterized in that a circumferential length of the insulating portion is an integral multiple of a width of a coil wound around the slot. The interphase insulator according to any one of claims 1 to 5,
An interphase insulator, wherein an assembly part for assembling other components is formed at an end of the insulation part. The interphase insulators according to any one of claims 1 to 5 are mounted side by side in a circumferential direction on coil end portions protruding from both end faces of the stator core among coils wound around slots of the stator core,
After that, each phase coil end is mounted by arranging any one of the interphase insulators arranged in a circumferential direction on a coil end portion formed by winding the next phase coil around a predetermined slot of the stator core. An interphase insulation method characterized by insulating parts.

Images