JP2005354769A - Interphase insulation paper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide interphase insulation paper for sufficiently ensuring an interphase insulation property of a coil without impairing an insertion property of the coil even if the molding quantity of a coil end is increased. <P>SOLUTION: The interphase insulation paper 10 has feet 40a, 40b inserted into slots of a stator core, plane sections 20, 20 coupled by the feet 40a, 40b at both ends, protruding from both end faces of the stator core and insulating between phases of the coil, a protrusion 21 formed by folding the plane section 20, and a fin section 25 for outwardly projecting at a side end of the stator core at both side faces of the protrusion 21. An area of the fin section 25 is an area of a teeth section or less. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an interphase insulating paper inserted between coil phases in order to ensure interphase insulation of a motor. In particular, it is suitable for use in a motor for driving a vehicle.

  In a motor using distributed winding (in particular, an inserter system), interphase insulating paper is inserted between the coil phases in order to provide an insulation distance between the different phase coils (to ensure insulation). 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 (see FIG. 1).

  Since this interphase insulating paper is generally planar, when the next phase coil is inserted into the stator core, the position of the interphase insulating paper is shifted, or the next phase coil and the interphase insulating paper interfere. Then there was a risk of biting. If the interphase insulating paper is misaligned or bitten in this way, sufficient insulation between the coil phases cannot be ensured. In particular, in a motor for driving a vehicle, the motor itself is large, the number of slots of the stator core is large, and the coil end shape is complicated. Therefore, misalignment and biting of interphase insulating paper are likely to occur.

  In view of this, various ingenuity has been proposed to ensure that interphase insulating paper can be inserted between the coil phases and to ensure sufficient insulation between the coil phases. One of them is disclosed in, for example, Japanese Patent Application Laid-Open No. 7-298530. The interphase insulating paper (insulating member) disclosed herein extends in the circumferential direction of the stator core and is inserted between the coil phases arranged in the radial direction of the stator core, and in the radial direction of the stator core. A bent piece portion that is extended and folded and inserted between the coil phases arranged in the circumferential direction of the stator core and formed integrally with the flat portion is provided.

  And in this interphase insulating paper, the insulation between each coil phase is obtained by inserting the bent piece portion that extends in the radial direction of the stator core and is inserted between the respective coil phases arranged in the circumferential direction of the stator core. It comes to secure. Here, since each plane part of the bent piece portion is pressed to the coil side through the elastic force of the bent piece portion itself, the bent piece portion is not affected even if the gap between the coils changes. The coil is expanded and contracted following each coil, and the change in the gap can be absorbed. In this way, the interphase insulating paper is securely held between the coils, and the separation and misalignment of the interphase insulating paper is effectively prevented, and the insulation between the coil phases is improved.

  However, the interphase insulating paper disclosed in Japanese Patent Application Laid-Open No. 7-298530 has a problem that insulation between the coil phases may not be ensured. This is because the bent piece part is merely a bent part extending from the flat part in the radial direction, and the coil at the coil end part cannot be covered reliably.

  Therefore, the present applicant has proposed interphase insulating paper that can sufficiently secure interphase insulation of a motor in Japanese Patent Application No. 2003-02240. As shown in FIG. 14, the interphase insulating paper 110 protrudes from both end surfaces when the leg portions 140a and 140b are inserted into the slots of the stator core and the leg portions 140a and 140b are connected to both ends and inserted into the stator core. It has a double-sided integrated type (ladder type) shape having flat portions 120 and 130 to be formed, and convex portions 121 and 131 whose upper surfaces are inclined by bending the flat portions 120 and 130 are formed.

Japanese Patent Laid-Open No. 7-298530 (pages 2 to 3, FIGS. 2 and 4)

  However, with the interphase insulating paper proposed in Japanese Patent Application No. 2003-000240, there is a case where the interphase insulation of the motor cannot be sufficiently ensured when the molding amount of the coil end is increased. This is because the interphase insulating paper is attached to the slot of the stator core where the coil 151 (for example, U phase coil) is mounted, and then the coil 152 of the next phase (for example, V phase coil) is inserted to form the coil end. If the molding amount of the end is large, as shown in FIG. 15, the position of the interphase insulating paper 110 is shifted, and adjacent coils 151 and 152 (for example, a U-phase coil and a V) in the vicinity of the cuff portion (A portion in the figure). Phase coils) may come into contact. For this reason, there has been a case where insulation between coils cannot be secured. In addition, the broken line shown in FIG. 15 has shown the state before inserting the coil 152 of the next phase.

  In order to prevent such misalignment of the interphase insulating paper, in Japanese Patent Application No. 2003-000240, as shown in FIG. 16, interphase insulation is provided with a flange 161 at each end on the stator side of the plane portions 120 and 130. Paper 160 was also proposed. However, in the interphase insulating paper 160, when the stator core is mounted, the flange 161 covers the slot opening, which may impair the insertion property of the next phase coil.

  Accordingly, the present invention has been made to solve the above-described problems, and even when the coil end molding amount is increased, the interphase insulation of the coil is sufficiently ensured without impairing the insertability of the coil. It is an object of the present invention to provide an interphase insulating paper that can be used.

  The interphase insulating paper according to the present invention made to solve the above problems is a phase insulating paper inserted between each coil phase in order to ensure interphase insulation of the motor, and a leg portion inserted into a slot of the stator core; A flat surface portion that is connected by the leg portions at both end portions and projects from both end surfaces of the stator core to insulate between the respective coil phases, a convex portion formed by bending the flat surface portion, and both side surfaces of the convex portion And a fin portion projecting outward or inward at the end on the stator core side.

  In this interphase insulating paper, fin portions projecting outward or inward are provided at end portions on the stator core side on both side surfaces of the convex portion. For this reason, even if it is inserted into the slot of the stator core and the next phase coil (for example, V phase coil, W phase coil) is inserted and the coil end is molded, the cuff portion In the vicinity, the fins are located between the coil phases. Therefore, even when the coil end molding amount is increased, the interphase insulation of the coil can be sufficiently ensured.

  In the interphase insulating paper according to the present invention, it is desirable that the area of the fin portion is not more than the area of the teeth portion of the stator core. In this way, when the interphase insulating paper is attached to the stator core, the fin portion does not cover the slot opening portion, so that the insertion property of the coil of the next phase is not impaired.

  In the interphase insulating paper according to the present invention, it is desirable that the upper surface of the convex portion be inclined so that the end portion on the stator core side of the convex portion protrudes toward the inner peripheral side of the stator core. The upper surface of the convex portion is a surface located on the inner peripheral side of the stator core when the interphase insulating paper is inserted into the stator core.

  By doing this, when the next phase coil is inserted into the stator core, the slope of the upper surface of the convex portion welcomes the next phase coil, so that it is possible to reliably prevent the interphase insulating paper from being caught between the coil phases. This is because the performance can be improved.

  The stator according to the present invention, which has been made to solve the above-described problems, is provided by insulating any one of the above-described interphase insulating papers by arranging a part of a plane portion in the circumferential direction of the stator core so as to overlap each other. It is characterized by ensuring.

  In this stator, since the interphase insulating paper described above is used, even if the position of the interphase insulating paper is shifted when the molding amount of the coil end is increased, the interphase insulating paper is located between the coil phases. Insulation between the coil phases can be ensured. Further, since the interphase insulating paper is disposed in a state where a part of the plane portion is overlapped in the circumferential direction of the stator core, the overlapping portion covers a portion where the insulation between the coil phases is secured only by the leg portion. be able to. Therefore, the reliability of insulation between the coil phases is greatly improved.

  According to the interphase insulating paper according to the present invention, a fin portion projecting outward or inward is provided at the end portion on the stator core side of the convex portion formed by bending the flat portion, and the area of the fin portion is defined as the tooth portion of the stator core. Since the area is equal to or less than the area, the interphase insulation of the coil can be sufficiently ensured without impairing the insertability of the coil even when the amount of coil end forming is increased.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a most preferred embodiment in which an interphase insulating paper of the present invention is embodied will be described in detail based on the drawings. In the present embodiment, the present invention is applied to a vehicle driving motor using distributed winding.

(First embodiment)
First, a schematic configuration of the stator is shown in FIG. FIG. 1 is a longitudinal sectional 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 is disposed between the stator core 52, the above-described three-phase coils 51U, 51V, and 51W disposed on the stator core 52, and between the phases of the coils (between the U phase and the V phase and between the V phase and the W phase). Interphase insulating paper 10 and 10. The details of the interphase insulating paper 10 will be described later.

  Here, the stator core 52 has a donut shape formed by laminating and integrally bonding a plurality of steel plates (see FIG. 2). As shown in FIG. 2, a plurality of slots 53 for arranging the phase coils 51U, 51V, 51W are formed at predetermined intervals on the inner peripheral surface of the stator core 52. FIG. 2 is a view showing a part (1/4 arc portion) of the stator core 52, and an interphase insulating paper for interphase insulation between the U phase coil 51U and the U phase coil 51U and the V phase coil 51V. 10 shows a state in which 10 is inserted. On the other hand, the coils 51U, 51V, 51W of each phase are formed by winding enameled wires. The coils 51U, 51V, 51W of the respective phases are inserted into the slots 53 of the stator core 52 through the interphase insulating paper 10.

  Subsequently, FIG. 3 shows a schematic configuration of the interphase insulating paper according to the first embodiment. FIG. 3 is a perspective view of the interphase insulating paper 10. Since the interphase insulating paper 10 is symmetrical in the vertical direction (axial direction of the stator), only the upper half is shown in FIG. The interphase insulating paper 10 has a substantially quadrangular shape (a size of about 10 cm on a side) with a central portion cut out in a substantially rectangular shape, and is formed of a hard paper material. Since the size of the interphase insulating paper is determined by the size of the motor, the size of the interphase insulating paper varies with the size of the motor.

  And in the interphase insulating paper 10, the plane parts 20 and 20 are formed in the upper and lower sides, respectively. These flat portions 20 and 20 are integrated by being connected by leg portions 40 a and 40 b at both ends of the interphase insulating paper 10. That is, when the interphase insulating paper 10 is inserted into the stator core 52, the planar portions 20, 20 are in the shape of both end surfaces integrated (ladder type) so as to protrude from both end surfaces of the stator core 52.

  Here, a convex portion 21 is formed on each of the planar portions 20 and 20. The convex portion 21 is formed by bending the flat portion 20. Specifically, valley folds 22a and 22b and mountain folds 23a and 23b are provided on the plane portion 20, and the valley folds 22a and 22b and the mountain folds 23a and 23b are respectively bent. The convex part 21 is formed. Here, the mountain folds 23a and 23b are not provided in parallel to the valley folds 22a and 22b, but are provided obliquely so that the top surface of the convex part 21 has a trapezoidal shape in plan view. Yes. For this reason, the side surface of the convex portion 21 has a substantially triangular shape, and the upper surface of the convex portion 21 is inclined downward from the center of the interphase insulating paper to the outside.

  By forming the projections 21 in this way, when the interphase insulating paper 10 is inserted into the stator core 52, the coils 51U, 51V, 51W that have already been inserted into the stator core 52 are wrapped. Further, in a state where the interphase insulating paper 10 is inserted into the stator core 52, the convex portion 21 forms a taper that expands from the inside to the outside of the stator core 52, in other words, has a mortar shape. Therefore, the next-phase coil (V-phase coil 51V or W-phase coil 51W) is inserted into the stator core 52 so as to be received by the convex portion 21. Therefore, when the next phase coil (V phase coil 51V or W phase coil 51W) is inserted into the stator core 52, the interphase insulating paper 10 is caught between the coil phases (between the U phase and the V phase and between the V phase and the W phase). There is no such thing.

  And the fin part 25 projected outside is provided in the stator side edge part of a convex part both sides | surface. The fin portion 25 is formed by bending a part of the convex portion 21. Further, the area of the fin portion 25 is equal to or less than the area of the teeth portion of the stator core 52. The teeth portion is a portion between adjacent slots.

  Further, the height of the flat portion 20 is slightly higher than the height of each phase coil 51U, 51V, 51W inserted into the stator core 52. As a result, it is possible to prevent the coils 51U, 51V, 51W of each phase from getting over the interphase insulating paper 10.

  On the other hand, the leg portions 40a and 40b are formed by connecting the upper and lower planar portions 20 and 20 at the end portions of the interphase insulating paper. The width of these leg portions 40a, 40b is formed slightly larger than the width of the slot 53 of the stator core 52 into which the interphase insulating paper 10 is inserted. Thus, when the interphase insulating paper 10 is inserted into the stator core 52, more specifically, when the leg portions 40a and 40b are inserted into the slots 53 of the stator core 52, as shown in FIG. 4, due to the elastic force of the leg portions 40a and 40b itself. The leg portions 40a and 40b are firmly held in the slot 53 of the stator core 52 without being displaced. 4 is a cross-sectional view of the slot portion of the stator core 52, and shows a state in which the interphase insulating paper 10 is inserted into the slot 53. FIG.

  Next, an operation of assembling the stator 50 using the interphase insulating paper 10 having the above configuration will be described with reference to FIGS. 5 and 6. FIG. 5 is a diagram illustrating a state after one interphase insulating paper 10 is inserted into the stator core 52. FIG. 6 is a diagram illustrating a state after all the interphase insulating paper 10 has been inserted into the stator core 52. 5 and 6 show only a state in which only the U-phase coil 51U is inserted.

  First, the U-phase coil 51U is inserted into the slot 53 of the stator core 52, and the U-phase coil 51U is expanded. The expansion of the coil is a process for opening the slot 53 of the stator core 52 in order to insert the next-phase coil (V-phase coil 51 </ b> V) into the stator core 52.

  When the expansion of the U-phase coil 51U is completed, the inter-phase insulating paper 10 for U-V interphase insulation is inserted into the stator core 52. The interphase insulating paper 10 is automatically inserted using an insertion jig (not shown). That is, first, the interphase insulating paper 10 held by the insertion jig is disposed on the inner peripheral side of the stator core 52. Next, the interphase insulating paper 10 held by the insertion jig is inserted into the stator core 52. That is, the leg portions 40 a and 40 b of the interphase insulating paper 10 are pushed into the slots 53 of the stator core 52. At this time, as shown in FIG. 5, the U-phase coil 51 </ b> U is inserted so that the convex portion 21 of the interphase insulating paper 10 is disposed in the portion where the stator core 52 is inserted into the slot 53.

  Thereafter, the interphase insulating paper 10 is sequentially inserted into the stator core 52 such that a part of the plane portion 20 overlaps with each other as described above. Specifically, as shown in FIG. 6, the leg portion 40a of the interphase insulating paper 10 to be inserted next to the slot adjacent to the slot into which the leg portion 40b of the interphase insulating paper 10 that has already been inserted is inserted. Inserted. Thereby, the part which has ensured the insulation between coil phases only by leg part 40a, 40b in the overlapping part of the plane part 20 can be covered. Therefore, the reliability of insulation between the coil phases is greatly improved. In the present embodiment, eight interphase insulating papers 10 are inserted into the stator core 52 in which the U-phase coil 51U is inserted. As a result, the interphase insulating paper 10 is disposed around the entire circumference of the stator core 52 without a gap.

  The area of the fin portion 25 is equal to or less than the area of the teeth portion of the stator core 52. For this reason, when the interphase insulating paper 10 is attached to the stator core 52, as shown in FIG. 5 or FIG. 6, the fin portion 25 does not cover the slot opening. Therefore, the insertion property of the V-phase coil 51V as the next phase is not impaired.

  Next, the V-phase coil 51 </ b> V is inserted into the slot 53 of the stator core 52. At this time, since the convex portion 21 of the interphase insulating paper 10 already inserted in the stator core 52 forms a mortar shape, the V-phase coil 51V is welcomed. Further, as described above, the fin portion 25 of the interphase insulating paper 10 does not prevent the insertion of the V-phase coil 51V. For this reason, since the V-phase coil 51V can be inserted into the stator core 52 very smoothly, the interphase insulating paper 10 is not caught between the U-phase coil 51U and the V-phase coil 51V.

  Then, the V-phase coil 51V is expanded. At this time, when the coil end is formed with a large amount, as shown in FIG. A state indicated by a broken line in FIG. 7 is a state in which no positional deviation occurs. FIG. 7 is a diagram illustrating a state of the interphase insulating paper 10 after the V-phase coil 51V is expanded.

  However, the interphase insulating paper 10 includes a fin portion 25 at the end of the convex portion 21 on the stator core side. For this reason, as shown in FIGS. 7 and 8, even if the interphase insulating paper 10 is misaligned, the fin portion 25 is positioned between the U-phase coil 51U and the V-phase coil 51V in the vicinity of the cuff portion. Interphase insulation between the phase coil 51U and the V-phase coil 51V can be firmly secured. 8 is a cross-sectional view taken along line AA shown in FIG.

  Thereafter, the interphase insulating paper disposed between the V-phase and the W-phase is inserted into the stator core 52 and the W-phase coil 51 </ b> W is further inserted into the stator core 52 in the above-described procedure. Then, final molding is performed to complete the three-phase stator 50.

  Here, since the insulation failure rate in the conventional stator using interphase insulating paper and the stator using interphase insulating paper according to the present embodiment was examined, the result is shown in FIG. In both cases, the stator was manufactured by increasing only the coil end forming amount under the same conditions. As shown in FIG. 9, in the conventional interphase insulating paper, the defect rate was 40% despite the N number being 5. On the other hand, in the interphase insulating paper 10 according to the present embodiment, the defect rate was 0% even when the N number was 60. From this, it was proved that the interphase insulation of the coil can be sufficiently ensured by using the interphase insulating paper 10 even when the molding amount of the coil end is increased.

  As described above, the interphase insulating paper 10 according to the first embodiment includes the fin portions 25 projecting outward at the stator core side end portions on both side surfaces of the convex portion 21. For this reason, even if the interphase insulating paper 10 is misaligned when the coil end forming amount is increased, the fin portion 25 is located between the U-phase coil 51U and the V-phase coil 51V in the vicinity of the cuff portion. Thereby, even if the position of the interphase insulating paper 10 is shifted when the amount of forming the coil end is increased, the interphase insulation between the U-phase coil 51U and the V-phase coil 51V can be firmly secured.

  And since the area of the fin part 25 is made below into the area of a teeth part, when the interphase insulating paper 10 is mounted | worn with the stator core 52, the fin part 25 does not cover a slot opening part. For this reason, the insertion property of the coil of the next phase is not impaired.

(Second Embodiment)
Next, a second embodiment will be described. The interphase insulating paper according to the second embodiment has the same basic configuration as the interphase insulating paper 10, but the configuration of the fin portion a is different. For this reason, in the following description, it demonstrates centering around difference, the same code | symbol is attached | subjected about the structure similar to 1st Embodiment, and the description is abbreviate | omitted suitably.

  FIG. 10 shows a schematic configuration of the interphase insulating paper according to the second embodiment. FIG. 10 is a perspective view of the interphase insulating paper 10a. Since the interphase insulating paper 10a is also symmetrical in the vertical direction (axial direction of the stator), only the upper half is shown in FIG. As with the interphase insulating paper 10, the interphase insulating paper 10a is formed by connecting the flat portions 20 and 20 including the convex portions 21 and 21 by the leg portions 40a and 40b at both ends. And the fin part 25a is provided in the stator core side edge part in the both end surfaces of the convex part 21. As shown in FIG. Unlike the first embodiment, the fin portion 25a protrudes inward. In addition, the area of the fin part 25a is also below the teeth part area.

  Next, an operation of assembling the stator using the interphase insulating paper 10a having the above-described configuration will be described with reference to FIGS. FIG. 11 is a diagram illustrating a state in which the interphase insulating paper 10a is inserted into the stator core 52 in which the U-phase coil 51 has been inserted. FIG. 12 is a diagram illustrating a state of the interphase insulating paper 10a after the V-phase coil 51V is expanded. 13 is a cross-sectional view taken along line AA shown in FIG.

  First, the U-phase coil 51U is inserted into the slot 53 of the stator core 52, and the U-phase coil 51U is expanded. When the expansion of the U-phase coil 51U is completed, the interphase insulating paper 10a for U-V interphase insulation is inserted into the stator core 52 as shown in FIG. At this time, since the fin portion 25a projects inward, it enters between the U-phase coil 51U and the cuff portion. Thereafter, the interphase insulating paper 10a is sequentially inserted into the stator core 52 so that the planar portions 20 partially overlap each other as described above.

  Next, the V-phase coil 51 </ b> V is inserted into the slot 53 of the stator core 52. At this time, since the convex portion 21 of the interphase insulating paper 10a already inserted in the stator core 52 forms a mortar shape, the V-phase coil 51V is welcomed. Moreover, since the fin part 25a of the interphase insulating paper 10a projects inward, insertion of the V-phase coil 51V is not hindered. For this reason, since the V-phase coil 51V can be inserted into the stator core 52 very smoothly, the interphase insulating paper 10a is not caught between the U-phase coil 51U and the V-phase coil 51V.

  Then, the V-phase coil 51V is expanded. At this time, since the fin portion 25a is fixed by the U-phase coil 51U, the position of the interphase insulating paper 10a is not easily displaced. Even if the position of the interphase insulating paper 10a is shifted, the amount of deviation is smaller than that of the first embodiment as shown in FIG. 12 (see FIG. 7). Even in such a case, as shown in FIGS. 12 and 13, the fin portion 25a is located between the U-phase coil 51U and the V-phase coil 51V in the vicinity of the cuff portion. For this reason, the insulation between phases of U phase coil 51U and V phase coil 51V can be secured firmly.

  Thereafter, the interphase insulating paper disposed between the V-phase and the W-phase is inserted into the stator core 52 and the W-phase coil 51 </ b> W is further inserted into the stator core 52 in the above-described procedure. Then, final molding is performed to complete the three-phase stator.

  As described above in detail, the interphase insulating paper 10 a according to the second embodiment includes the fin portions 25 a that project inwardly from the end portions on the side of the stator core on both side surfaces of the convex portion 21. For this reason, since the fin part 25a is fixed by the U-phase coil 51U, even if the molding amount of the coil end is increased, the position of the interphase insulating paper 10a is not easily displaced. Even if the position of the interphase insulating paper 10a is shifted, the fin portion 25 is located between the U-phase coil 51U and the V-phase coil 51V in the vicinity of the cuff portion. Thereby, even if the position of the interphase insulating paper 10a is displaced when the amount of coil ends is increased, the interphase insulation between the U-phase coil 51U and the V-phase coil 51V can be securely secured. Moreover, since the fin part 25 protrudes inside, the insertability of the V-phase coil 51V is not impaired.

  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. In the above-described embodiment, the interphase insulating paper 10 between the U and V phases is exemplified, but the present invention can also be applied to the interphase insulating paper between the V and W phases.

  In the above-described embodiment, the motor for driving the vehicle is exemplified by the application of the interphase insulating paper and the stator according to the present invention. However, the present invention is not limited to the motor of the automobile but uses distributed winding. It can be applied to motors used for any purpose.

It is a longitudinal cross-sectional view which shows schematic structure of the stator which uses the phase insulation paper which concerns on 1st Embodiment. It is a figure which shows schematic structure of the stator of FIG. It is a perspective view which shows schematic structure of the phase insulation insulating paper which concerns on 1st Embodiment. It is a cross-sectional view of the slot portion of the stator core. It is a figure which shows the state after inserting one sheet of interphase insulation paper in a stator core after U phase coil insertion. It is a figure which shows the state after inserting all the interphase insulating papers in a stator core after U phase coil insertion. It is a figure which shows the state of the interphase insulation paper after the expansion molding of a V-phase coil. It is sectional drawing in the AA line shown in FIG. It is a graph which shows an insulation defect rate. It is a perspective view which shows schematic structure of the phase insulation paper which concerns on 2nd Embodiment. It is a figure which shows the state which inserted the interphase insulation paper in the stator core in which the U-phase coil has been inserted. It is a figure which shows the state of the interphase insulation paper after the expansion molding of a V-phase coil. It is sectional drawing in the AA shown in FIG. It is a top view which shows schematic structure of the phase insulation paper which the present applicant proposed. It is a figure which shows the state of the interphase insulation paper after the expansion molding of a V-phase coil. It is a figure which shows the interphase insulation paper which provided the collar.

Explanation of symbols

10 Interphase insulating paper 20 Plane portion 25 Fin portion 21 Convex portions 40a, 40b Leg portion 50 Stator 51U U-phase coil 51V V-phase coil 51W W-phase coil 52 Stator core 53 Slot

Claims (4)

In interphase insulating paper inserted between each coil phase to ensure interphase insulation of the motor,
Legs inserted into the slots of the stator core;
Planar portions that are connected by the leg portions at both end portions and that project from both end surfaces of the stator core to insulate between the coil phases;
A convex portion formed by bending the planar portion;
A fin portion projecting outward or inward to the end portion on the stator core side on both side surfaces of the convex portion;
An interphase insulating paper characterized by comprising: In the interphase insulating paper according to claim 1,
The interphase insulating paper, wherein the area of the fin portion is equal to or less than the area of the teeth portion of the stator core. In the interphase insulating paper according to claim 1 or claim 2,
The interphase insulating paper, wherein an upper surface of the convex portion is inclined so that an end portion on the stator core side of the convex portion protrudes toward an inner peripheral side of the stator core.   The insulation between each coil phase is ensured by disposing any one of the interphase insulating paper according to any one of claims 1 to 3 so as to overlap a part of the plane portion in a circumferential direction of the stator core. Stator.

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