JP2004166476A - Interphase paper of motor interphase insulation, and stator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet of interphase paper of motor interphase insulation capable of making inserting operation automatic between each coil phase, and to provide a stator. <P>SOLUTION: An interphase paper 10 has leg parts 40a, 40b to be inserted into a slot 53, and has a double-side integrated shape (ladder-like shape) with flat parts 20, 30 having both ends joined with the leg parts 40a, 40b and projected from both edge faces when it is inserted into a stator core 52. At the same time the interphase paper 10 has projected parts 21, 31 on each top face slanted by bending the flat part 20, 30. The interphase paper 10 is so arranged that the flat parts 20, 30 are overlapped partly in a circumferential direction of the stator core 52, and by ensuring insulation between each coil phase, a stator 50 can be fabricated. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an insulating interleaving paper inserted between each coil phase in order to ensure interphase insulation of a motor, and a stator using the interleaving paper. In particular, it is suitable for use in a motor for driving a hybrid vehicle.
[0002]
[Prior art]
In a motor using distributed winding (especially, an inserter method), an interphase insulating sheet is inserted between each coil phase in order to provide an insulation distance between different phase coils (ensure insulation). For example, in a three-phase motor, interphase insulating interleaf paper is inserted between the U and V phases and between the V and W phases (see FIG. 1).
[0003]
Since the interphase insulating paper is generally in a planar shape, the position of the interphase insulating paper is shifted when the next phase coil is inserted into the stator core, or the next phase coil and the There is a possibility that the insulating phase paper may interfere and bite. If the position of the interphase insulating paper is shifted or bitten, the insulation between the coil phases cannot be sufficiently ensured. In particular, in the motor for driving a hybrid vehicle, the motor itself is large, the number of slots in the stator core is large, and the coil end shape is complicated, so that the interphase insulating interphase paper is likely to be displaced or jammed.
[0004]
Therefore, various devices have been proposed to ensure that the interphase insulating paper can be inserted between the coil phases and to ensure sufficient insulation between the coil phases. One of them is disclosed, for example, in JP-A-7-298530. In the insulating interphase paper (insulating member) disclosed herein, a flat portion that 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 a bent piece portion that is inserted between the coil phases arranged in the circumferential direction of the stator core and that is formed integrally with the flat portion.
[0005]
In the interphase insulating paper, the folded piece extending in the radial direction of the stator core is inserted between the coil phases arranged in the circumferential direction of the stator core to thereby provide insulation between the coil phases. To ensure the nature. Here, since each flat portion of the bent piece portion is pressed toward the coil via the elastic force of the bent piece portion itself, even if the gap between the coils changes, the bent piece portion is Each coil is expanded and contracted so as to be able to absorb the change in the gap. In this way, the interphase insulating interphase paper is reliably held between the coils, effectively preventing separation and displacement of the interphase insulating interleaving paper, and improving the insulation between the coil phases. I have.
[0006]
[Patent Document 1]
JP-A-7-298530 (pages 2-3, FIG. 2, FIG. 4)
[0007]
[Problems to be solved by the invention]
However, the interphase insulating paper disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 7-298530 has a problem that insulation between coil phases may not be ensured. The reason for this is that the bent piece portion merely extends in the radial direction from the flat portion and is bent, and thus cannot reliably cover the coil of the coil end portion.
[0008]
In addition, conventional interphase insulating papers, including those disclosed in Japanese Patent Application Laid-Open No. 7-298530, had to be manually inserted between the coil phases. For this reason, the state in which the interphase insulating paper is inserted varies, and the insulation between the coil phases may not be ensured. This is a particular problem for a motor for driving a hybrid vehicle. This is because a motor for driving a hybrid vehicle has a high operating voltage due to a wide operating area, and has a stricter standard for motor insulation performance than a general motor. Further, the motor for driving a hybrid vehicle tends to rotate at a high speed in order to reduce the cost, and the operating voltage tends to be higher in the future.
[0009]
In addition, the needs of the times are expected to increase the need for hybrid vehicles in the future. However, under the current situation, interphase insulating paper is manually inserted between each coil phase, so the only way to meet such needs is to increase the number of workers, but this is disadvantageous in terms of cost. Become. For this reason, automatic insertion of interphase insulating paper is desired.
[0010]
Therefore, the present invention has been made to solve the above-mentioned problems, and a phase paper for interphase insulation capable of automating the insertion work between each coil phase while sufficiently securing interphase insulation of the motor and It is an object to provide a stator.
[0011]
[Means for Solving the Problems]
The interphase motor interphase paper according to the present invention made in order to solve the above-mentioned problem is a motor interphase insulating interleaf paper inserted between each coil phase in order to secure interphase insulation of a motor. And a flat portion which is connected by the leg portions at both ends and protrudes from both end surfaces of the stator core to insulate the coil phases from each other.
[0012]
This interphase paper for motor interphase insulation has a shape of a ladder type in which both end faces of the stator core are connected by legs at both ends of the interphase paper. Therefore, in the interphase insulating paper according to the present invention, the legs can be automatically inserted into the slots of the stator core from the inner peripheral side of the stator core using the insertion jig. That is, the use of the phase separation paper for motor phase separation according to the present invention makes it possible to automate the operation of inserting the phase separation paper.
[0013]
In the interphase insulating sheet for a motor according to the present invention, the width of the leg is preferably larger than the slot width of the stator core. With this configuration, when the motor interphase insulating paper is inserted into the stator core, the legs are firmly held in the slots due to the elasticity of the legs themselves, so that the misalignment of the motor interphase insulating paper is prevented. This is because it is surely prevented. As a result, when the next phase coil is inserted into the stator core, the position of the interphase motor interphase paper already inserted into the stator core does not shift, so that the insulation between the coil phases is improved.
[0014]
In addition, the interphase paper for motor interphase insulation according to the present invention preferably has a convex portion formed by bending a flat portion, and the upper surface of the convex portion is preferably inclined. By doing so, the coil inserted into the stator core can be reliably covered up to the coil end portion, so that the insulating property is improved. Also, when inserting the coil of the next phase into the stator core, the inclination of the upper surface of the convex portion receives the coil of the next phase, so that the interphase paper for motor interphase insulation between the coil phases can be reliably prevented, This is because the insulating property is improved.
[0015]
Furthermore, in the interphase paper for motor interphase insulation according to the present invention, it is preferable that a flange is integrally formed at an end of the flat portion on the stator side. Thereby, even when the molding amount of the coil end portion is increased, insulation between the coil phases can be sufficiently ensured.
[0016]
The flange may be formed partially or continuously, but is preferably formed continuously. This is because the stiffness of the flange can be increased by forming the sheet continuously, so that the interleaving paper is less likely to be displaced.
[0017]
Further, it is desirable that a relationship of L2> L1 is established between the lead-side length L1 and the non-lead-side length L2 of the flange. By doing so, even if the phase paper for motor phase insulation already inserted in the stator core slips up at the time of coil insertion of the next phase, it is possible to secure the phase insulation in the gum part on the non-lead side, as a result This is because the insulation performance is improved.
[0018]
In the interphase insulating paper for a motor according to the present invention, it is desirable that the height of the plane portion is set to be higher than the height of the coil end when inserted into the stator core. By doing so, it is possible to reliably prevent the coils of each phase from climbing over the interphase paper for motor interphase insulation, thereby improving insulation.
[0019]
The stator according to the present invention, which has been made to solve the above-described problems, has a structure in which any one of the above-described motor interphase insulating interleaving papers is disposed by overlapping a part of a plane portion in the circumferential direction of the stator core. It is characterized by ensuring insulation between phases.
[0020]
In this stator, since the above-described interphase paper for motor interphase insulation is used, the interphase paper for interphase insulation between motors is reliably inserted between the coil phases, so that the insulation between the coil phases is improved. Further, since the interphase paper for motor interphase insulation is arranged in a state where a part of the plane portion is overlapped in the circumferential direction of the stator core, a portion where the insulation between the coil phases is secured only by the legs at the overlapping portion. Can be covered. Therefore, the reliability of the insulation between the coil phases is greatly improved. Furthermore, since the operation of inserting the interphase paper for motor interphase insulation is automated, it is very advantageous in terms of the manufacturing cost of the stator.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the most preferred embodiment of a motor interphase insulating paper and a stator according to the present invention will be described in detail with reference to the drawings. In the present embodiment, the present invention is applied to a motor for driving a hybrid vehicle using distributed winding.
[0022]
(First Embodiment)
Therefore, first, a schematic configuration of the stator according to the first embodiment 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 three-phase coils 51U, 51V, and 51W disposed on the stator core 52, and between the coils (between the U-phase and the V-phase and between the V-phase and the W-phase). And interphase paper 10. The details of the interleaf paper 10 will be described later.
[0023]
Here, the stator core 52 has a donut shape formed by laminating a plurality of steel plates and integrally bonding them (see FIG. 2). As shown in FIG. 2, a plurality of slots 53 for disposing 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 diagram showing a part (1/4 arc) of the stator core 52, and shows a U-phase coil 51U and an interphase paper 10 for performing inter-phase insulation between the U-phase coil 51U and the V-phase coil 51V. Shows a state in which is inserted. On the other hand, the coils 51U, 51V, 51W of each phase are formed by winding an enameled wire. The coils 51U, 51V, 51W of each of these phases are inserted into the slots 53 of the stator core 52 via the interleaving paper 10.
[0024]
Next, FIG. 3 shows a schematic configuration of a motor interphase insulating phase sheet according to the first embodiment. FIG. 3 is a plan view of the interleaf paper 10. As shown in FIG. 3, the interphase paper 10 has a substantially square shape (a size of about 10 cm on a side) in which a central portion is cut out in a substantially rectangular shape, and is formed of a hard paper material. is there. Since the size of the interleaving paper is determined by the size of the motor, the size of the interleaving paper differs depending on the size of the motor.
[0025]
In the interleaf paper 10, flat portions 20, 30 are formed on the upper and lower sides, respectively. These flat portions 20 and 30 are connected by leg portions 40a and 40b at both ends of the interleaf paper 10 to be integrated. That is, when the interleaf paper 10 is inserted into the stator core 52, the flat portions 20 and 30 have an integrated shape (ladder shape) having both end surfaces protruding from both end surfaces of the stator core 52.
[0026]
Here, convex portions 21 and 31 are formed on each of the planar portions 20 and 30, respectively. These convex portions 21 and 31 are formed by bending the flat portions 20 and 30. Specifically, the flat portion 20 is provided with valley folds 22a and 22b and mountain folds 23a and 23b, and is bent by the valley folds 22a and 22b and the mountain folds 23a and 23b, respectively. , Convex portions 21 are formed. Here, the mountain folds 23a and 23b are not provided parallel to the valley folds 22a and 22b, but are provided diagonally so that the top surface of the protrusion 21 has a trapezoidal shape in plan view. I have. 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 has a downward slope outward from the center of the interleaved paper.
[0027]
Similarly, the flat portion 30 is also provided with valley folds 32a and 32b and mountain folds 33a and 33b. By being bent by the valley folds 32a and 32b and the mountain folds 33a and 33b, respectively, A convex portion 31 is formed. Here, the mountain folds 33a and 33b are not provided parallel to the valley folds 32a and 32b, but are provided obliquely so that the top surface of the protrusion 31 has a trapezoidal shape in plan view. I have. For this reason, the side surface of the convex portion 31 has a substantially triangular shape, and the upper surface of the convex portion 31 has a downward slope outward from the center of the interleaf paper.
[0028]
By forming the protrusions 21 and 31 in this manner, when the phase paper 10 is inserted into the stator core 52, the coils 51U, 51V and 51W already inserted into the stator core 52 are wrapped. When the interphase paper 10 is inserted into the stator core 52, the protrusions 21 and 31 form a taper that expands from the inside to the outside of the stator core 52, in other words, have a mortar shape. Therefore, the coil of the next phase (the V-phase coil 51V or the W-phase coil 51W) is inserted into the stator core 52 so as to be received by the projections 21 and 31. For this reason, when inserting the next phase coil (V-phase coil 51V or W-phase coil 51W) into the stator core 52, the interleaf paper 10 does not bite between the coil phases (between the U-phase and the V-phase). It has become.
[0029]
The heights H1, H2 of the plane portions 20, 30 are slightly higher than the heights of the phase coils 51U, 51V, 51W inserted into the stator core 52. Thereby, it is possible to prevent the coils 51U, 51V, 51W of each phase from getting over the interphase paper 10.
[0030]
On the other hand, the leg portions 40a and 40b connect the flat portions 20 and 30 at the end of the interleaving paper. The width of these legs 40a and 40b is formed slightly larger than the width of the slot 53 of the stator core 52 into which the interleaf paper 10 is inserted. Thus, when the interleaf paper 10 is inserted into the stator core 52, and more specifically, when the legs 40a, 40b are inserted into the slots 53 of the stator core 52, the legs 40a, 40b themselves are resilient as shown in FIG. 4 or FIG. The force allows the legs 40a and 40b to be securely held in the slots 53 of the stator core 52 without shifting. FIG. 4 is a cross-sectional view of the slot portion of the stator core 52, and shows a state where the interleaf paper 10 is inserted into the slot 53.
[0031]
The pitch P between the legs 40a and 40b is set to the sum of the height of the stator core 52, the cuff height, and the allowance (set to 2 mm in the present embodiment). That is, the length is set to the shortest length that allows the operation of inserting the interleaf paper 10 to be automated. In this manner, by shortening the leg pitch P, the displacement of the interleaf paper 10 can be minimized, so that the insulation performance is improved.
[0032]
Next, an operation of assembling the stator 50 using the phase paper 10 having the above configuration will be described with reference to FIGS. FIG. 5 is a diagram showing a state before the interleaf paper 10 is inserted into the stator core 52. FIG. 6 is a diagram illustrating a state after one sheet of interphase paper 10 has been inserted into the stator core 52. FIG. 7 is a diagram illustrating a state after all the phase sheets 10 have been inserted into the stator core 52. FIGS. 5 to 7 show only a state in which only the U-phase coil 51U is inserted.
[0033]
First, as shown in FIG. 5, 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 a slot 53 of the stator core 52 in order to insert a coil of the next phase (the V-phase coil 51V in the state of FIG. 5) into the stator core 52.
[0034]
Then, when the expansion of the U-phase coil 51U is completed, the phase paper 10 for the U-V phase insulation is inserted into the stator core 52. The interleaving paper 10 is automatically inserted using an insertion jig (not shown). That is, first, the interphase paper 10 held by the insertion jig is arranged on the inner peripheral side of the stator core 52. Next, the interphase paper 10 held by the insertion jig is inserted into the stator core 52. That is, the legs 40 a and 40 b of the interleaf paper 10 are pushed into the slots 53 of the stator core 52. At this time, the U-phase coil 51U is inserted so that the protrusion 21 (31) of the interleaf paper 10 is arranged at the portion where the U-phase coil 51U is inserted into the slot 53 of the stator core 52 (see FIG. 6).
[0035]
Here, since the width of the legs 40a and 40b is slightly larger than the width of the slot 53, the legs 40a and 40b are firmly held in the slot 53 by the elastic force of the legs themselves. For this reason, misalignment of the interleaf paper 10 inserted into the stator core 52 is reliably prevented. Accordingly, when a V-phase coil 51V described later is inserted into the stator core 52, the position of the interphase paper 10 already inserted into the stator core 52 does not shift.
[0036]
Thereafter, the interleaf paper 10 is sequentially inserted into the stator core 52 so that the flat portions 20 (30) partially overlap each other as described above. Specifically, as shown in FIG. 7, the legs 40a of the phase paper 10b to be inserted next are connected to the slots 53a adjacent to the slots 53b in which the legs 40b of the already inserted phase paper 10a are inserted. Inserted. As a result, it is possible to cover a portion where the insulation between the coil phases is secured only by the legs 40a and 40b in the overlapping portion of the flat portion 20 (30). Therefore, the reliability of the insulation between the coil phases is greatly improved. In the present embodiment, eight phase sheets 10 are inserted into stator core 52 into which U-phase coil 51U is inserted. As a result, the interleaf paper 10 is arranged around the entire circumference of the stator core 52 without any gap.
[0037]
Next, V-phase coil 51V is inserted into slot 53 of stator core 52. At this time, since the convex portions 21 (31) of the interleaf paper 10 already inserted into the stator core 52 have a mortar shape, the V-phase coil 51V is received. Therefore, the V-phase coil 51V can be inserted into the stator core 52 very smoothly, so that the interphase paper 10 does not bite between the U-phase coil 51U and the V-phase coil 51V. The interleaf paper 10 already inserted in the stator core 52 is firmly held in the slot 53 by the legs 40a and 40b. Therefore, when the V-phase coil 51V is inserted into the stator core 52, the position of the interphase paper 10 already inserted into the stator core 52 does not shift. Therefore, sufficient inter-phase insulation between the U-phase coil 51U and the V-phase coil 51V can be ensured.
[0038]
After the expansion of the V-phase coil 51V, the interleaf paper 10 disposed between the V-phase and the W-phase is inserted into the stator core 52 and the W-phase coil 51W is inserted into the stator core 52 in the above-described procedure. You. Thereafter, final molding is performed, and a three-phase stator 50 as shown in FIG. 8 is completed. FIG. 8 is a plan view showing a schematic configuration of the three-phase stator, and shows a quarter arc thereof. The positional relationship between the interleaving paper 10UV inserted between the U and V phases and the interleaving paper 10VW inserted between the V and W phases in the stator of FIG. 8 is as shown in FIG. FIG. 9 is a diagram schematically illustrating a positional relationship between the interleaving papers 10UV and 10VW.
[0039]
As described above, by using the interleaf paper 10 according to the present embodiment, the operation of inserting the interleaf paper 10 disposed between the coil phases (between the U-phase and the V-phase and between the V-phase and the W-phase) can be automated. it can. This is advantageous in terms of the manufacturing cost of the entire stator 50. Here, FIGS. 10, 11, and 12 are cross-sectional views of the UU section, the VV section, and the WW section shown in FIG. 8 (and FIG. 9). As is clear from FIGS. 10 to 12, it can be seen that the interphase papers 10UV and 10VW ensure the interphase insulation in each of the phase coils 51U, 51V and 51W. In other words, the interphase paper 10UV ensures sufficient interphase insulation between the U-phase coil 51U and the V-phase coil 51V, and the interphase paper 10VW ensures sufficient interphase insulation between the V-phase coil 51V and the W-phase coil 51W. Have been.
[0040]
As described above in detail, the phase paper 10 according to the first embodiment is connected to the legs 40a and 40b inserted into the slots 53 of the stator core 52 by the legs 40a and 40b at both ends of the phase paper. , And has flat portions 20 and 30 projecting from both end surfaces when the stator core 52 is inserted, so that the legs 40 a and 40 b are slotted from the inner peripheral side of the stator core 52. 53 can be automatically inserted.
[0041]
Since the widths of the legs 40a and 40b are slightly larger than the width of the slots 53, when the interleaf paper 10 is inserted into the stator core 52, the legs 40a and 40b It is securely held in 53. For this reason, misalignment of the interleaf paper 10 is reliably prevented. As a result, when the next phase coil (51V or 51W) is inserted into the stator core 52, the position of the interphase paper 10 already inserted into the stator core 52 does not shift. Therefore, insulation between coil phases is improved.
[0042]
In addition, convex portions 21 and 31 are formed by folding the flat portions 20 and 30 on the interphase paper 10, and since the upper surfaces of the convex portions 21 and 31 are inclined, the coil already inserted into the stator core 52 is coiled. The end part can be reliably covered. When all the interphase papers 10 are disposed on the stator core 52, the projections 21 and 31 have a mortar shape. Therefore, when the next phase coil is inserted into the stator core 52, the projections 21 and 31 become the next phase coil. Welcome. Therefore, the coil of the next phase is inserted into the stator core 52 very smoothly, so that the interphase paper 10 is reliably prevented from being caught between the coil phases.
[0043]
Furthermore, since the heights H1 and H2 of the plane portions 20 and 30 are set so as to be higher than the height of the coil ends when the interleaf paper 10 is inserted into the stator core 52, the coils of each phase can be used. Never get over.
[0044]
Since the interphase paper 10 is used in the stator 50, the interphase paper 10 is reliably inserted between the coil phases, so that the insulation between the coil phases is improved. In addition, since the interphase paper 10 is arranged in a state where the flat portions 20 and 30 are partially overlapped in the circumferential direction of the stator core 52, insulation between the coil phases is ensured only by the legs 40a and 40b at the overlapping portion. Can be covered. Therefore, the reliability of the insulation between the coil phases is greatly improved. In addition, since the operation of inserting the interleaf paper 10 is automated, the manufacturing cost of the stator 50 is advantageous.
[0045]
(Second embodiment)
Next, a second embodiment will be described. Accordingly, FIGS. 13 and 14 show a schematic configuration of the interleaf paper according to the second embodiment. FIG. 13A is a plan view showing a schematic configuration of the interleaf paper inserted between the U phase and the V phase, and FIG. 13B is a schematic diagram of the interleaf paper inserted between the U phase and the V phase. FIG. FIG. 14 is a plan view showing a schematic configuration of an interleaf sheet inserted between the V phase and the W phase. The interleaving papers shown in FIGS. 13 and 14 are both present on both sides of the coil end as shown in FIG. 3, but here, for simplicity, only one side of the coil end is shown.
[0046]
Here, in the case where the molding amount of the coil end portion is increased in order to reduce the coil end dimension, as shown in FIGS. 15 to 17, if the above-described interphase paper 10UV, 10VW is used, the interphase paper becomes There is a case where it does not surely enter between the coil phases. In other words, the coils of each phase may enter the space between the interleaving paper closer to the stator core 52 and the stator core 52. In this case, the coils cannot be reliably separated from each other by the interphase paper, and the interphase insulation cannot be sufficiently ensured. Also, in the portion where the leg portion 40a (40b) of the interleaved paper exists, the interleaved paper is hard to be shifted, but in other portions, the interleaved paper is away from the leg portion 40a (40b). Easy to slip.
[0047]
For this reason, when the molding amount of the coil end portion is increased, the above-described interphase papers 10UV and 10VW cannot reliably isolate the coil phases, and sufficiently secure the interphase insulation. There is a case where it cannot be done. More specifically, the V-phase coil 51V and the W-phase coil 51W come into contact with each other in the portion A shown in FIG. 15, and the U-phase coil 51U and the V-phase coil 51V come into contact with each other in the portion B. In addition, the V-phase coil 51V and the W-phase coil 51W come into contact with each other at the portion C shown in FIG. Further, the U-phase coil 51U and the V-phase coil 51V come into contact with each other at the portion D shown in FIG.
[0048]
Therefore, in the interphase paper 60UV, 60VW according to the present embodiment, as shown in FIGS. 13 and 14, the flanges 61a, 61b are provided at the ends of the flat portions 20, 30 on the stator side. The flanges 61a and 61b are bent so as to be substantially parallel to the end face of the stator core 52, as shown in FIG. By being bent in this way, it is possible to stabilize the fit in the stator core 52.
[0049]
The lengths L1 and L2 of the flanges 61a and 61b are set so that L2> L1. That is, the length L2 of the flange 61b on the non-lead side is set to be longer than the length L1 of the flange 61a on the lead side. Thereby, even if the phase papers 60UV and 60VW slip up during the coil insertion, the phase insulation of the gum portion on the side opposite to the lead can be ensured. Since the configuration other than the flanges 61a and 61b is substantially the same as the interleaf paper 10 according to the first embodiment, the same reference numerals are given and the description is omitted.
[0050]
By providing the flanges 61a and 61b at the stator-side ends of the plane portions 20 and 30 of the interleaving paper 60UV and 60VW, as shown in FIGS. 18 to 20, the molding amount of the coil end portion is increased. Even in this case, the phase papers 60UV and 60VW surely enter between the coils and the stator core 52. That is, it is possible to reliably prevent each phase coil from entering between the stator core 52 and the phase papers 60UV and 60VW, and it is difficult for the phase papers 60UV and 60VW to be displaced.
[0051]
More specifically, by providing the flange 61a in the portion A shown in FIG. 18, the V-phase coil 51V and the W-phase coil 51W can be reliably isolated. Similarly, also in the portion B, the provision of the flange 61a allows the U-phase coil 51U and the V-phase coil 51V to be reliably isolated. Further, in the portion C shown in FIG. 19, by providing the flange 61a, the V-phase coil 51V and the W-phase coil 51W can be reliably isolated. Further, in D shown in FIG. 20, the provision of the flange 61a allows the U-phase coil 51U and the V-phase coil 51V to be reliably isolated from each other. Although only the flange 61a is shown and described here, the flange 61b also operates in the same manner as the flange 61a.
[0052]
The interleaving papers 60UV and 60VW are manufactured by punching insulating paper into the shapes shown in FIGS. 13A and 14 and then bending the valley folds 22a and 22b and the mountain folds 23a and 23b. .
[0053]
As described above, according to the interleaving papers 60UV and 60VW, the flanges 61a and 61b are provided at the stator-side end portions of the flat portions 20 and 30, so that even when the molding amount of the coil end portion is increased, each of the coils can be formed. Insulation between the phases can be sufficiently ensured. The three-phase stator using the interleaving papers 60UV and 60VW can be manufactured by performing the same process as in the first embodiment. That is, the operation of inserting the interleaving paper 60UV and 60VW can also be automated.
[0054]
Here, a modified example of the second embodiment will be described with reference to FIGS. FIG. 21 is a plan view showing the interleaf paper inserted between the U phase and the V phase. FIG. 22 is a plan view showing an interleaf sheet inserted between the V phase and the W phase. These interleaving papers 70UV and 70VW have substantially the same configuration as the interleaving papers 60UV and 60VW, but the flanges 71a and 71b are not separated and are provided continuously. The difference is that folds 72 are inserted at both ends of 71a and 71b. These interleaved papers 70UV and 70VW are manufactured by punching out insulating paper into a shape as shown in FIGS. 21 and 22, and then drawing by a press die.
[0055]
Also, in these phase papers 70UV and 70VW, the flanges 71a and 71b are provided at the ends of the flat portions 20 and 30 on the star core side. Therefore, even when the molding amount of the coil end portion is increased, the phase paper 70UV and 70VW are not used. , 70VW surely enter between the coils of each phase and the stator core 52. In other words, it is possible to reliably prevent the coils of each phase from entering between the stator core 52 and the interleaving paper 70UV, 70VW, and it is difficult for the interleaving paper 70UV, 70VW to shift. In addition, since the flanges 71a and 71b are formed continuously, the rigidity of the flanges 71a and 71b is increased, so that the displacement of the phase papers 70UV and 70VW can be more reliably prevented. Furthermore, since the folds 72 are formed, even if the flanges 71a and 71b are formed continuously, the bending direction of the flanges is determined, so that the fitting to the starter core 52 can be stabilized.
[0056]
It should be noted that the above-described embodiment is merely an example, and does not limit the present invention in any way. Needless to say, various improvements and modifications can be made without departing from the gist of the invention. In the above-described embodiment, an example in which the interleaf paper and the stator according to the present invention are applied to a motor for driving a hybrid vehicle has been described. However, the present invention is not limited to motors for automobiles, and any type using distributed winding may be used. It can be applied to motors used for applications.
[0057]
【The invention's effect】
As described above, according to the phase paper for motor phase insulation according to the present invention, in the phase paper for motor phase insulation inserted between each coil phase in order to ensure the phase insulation of the motor, the legs inserted into the slots of the stator core And a flat portion that is connected by the legs at both ends and protrudes from both ends of the stator core to insulate between the coil phases, and has an integrated (ladder) shape at both ends. The legs can be automatically inserted into the slots of the stator core from the inner peripheral side of the stator core.
[0058]
In the motor interphase insulating phase paper according to the present invention, since the width of the leg is larger than the slot width of the stator core, when the motor interphase insulating phase paper is inserted into the stator core, the elastic force of the leg itself is obtained. The legs are securely held in the slots. Therefore, the displacement of the interphase sheet for motor interphase insulation is reliably prevented. As a result, when inserting the coil of the next phase into the stator core, the position of the interphase motor interphase paper already inserted into the stator core does not shift. Therefore, the insulation between the coil phases is greatly improved.
[0059]
Further, the interphase paper for motor interphase insulation according to the present invention has a convex portion formed by bending a flat portion, and the upper surface of the convex portion is inclined, so that the coil already inserted into the stator core is replaced with the coil end portion. Can be reliably covered. Further, when the next phase coil is inserted into the stator core, the inclination of the upper surface of the convex portion receives the next phase coil, so that the interphase paper for motor interphase insulation between the coil phases can be reliably prevented. Therefore, the insulation between the coil phases is greatly improved.
[0060]
Furthermore, in the interphase insulating paper for a motor interphase according to the present invention, the flange is formed partially or continuously at the end of the flat portion on the stator side, so even when the molding amount of the coil end portion is increased. In addition, sufficient insulation between the coil phases can be ensured.
[0061]
Then, the stator according to the present invention secures insulation between the coil phases by arranging any one of the above-described motor interphase insulating interleaving papers with a part of the plane portion overlapping in the circumferential direction of the stator core. The insulation between the coil phases is greatly improved. Further, since the interphase paper for motor interphase insulation is arranged in a state where a part of the plane portion is overlapped in the circumferential direction of the stator core, a portion where the insulation between the coil phases is secured only by the legs at the overlapping portion. Can be covered. Therefore, the reliability of the insulation between the coil phases is greatly improved. Furthermore, since the operation of inserting the interphase paper for motor interphase insulation is automated, it is advantageous in terms of the manufacturing cost of the stator itself.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view illustrating a schematic configuration of a stator according to a first embodiment.
FIG. 2 is a diagram showing a schematic configuration of a stator of FIG. 1;
FIG. 3 is a plan view illustrating a schematic configuration of a motor interphase insulating phase sheet according to the first embodiment.
FIG. 4 is a cross-sectional view of a slot portion of a stator core.
FIG. 5 is a diagram showing a state before inserting the interleaf paper into the stator core.
FIG. 6 is a diagram showing a state after one sheet of interphase paper has been inserted into a stator core.
FIG. 7 is a diagram showing a state after all the phase sheets have been inserted into the stator core.
FIG. 8 is a plan view showing a schematic configuration of a three-phase stator.
FIG. 9 is a diagram schematically showing a positional relationship of interphase paper in the three-phase stator of FIG. 8;
FIG. 10 is a sectional view showing a section taken along line UU shown in FIG. 8;
FIG. 11 is a sectional view showing a section taken along line VV shown in FIG. 8;
FIG. 12 is a sectional view showing a section taken along line WW shown in FIG. 8;
13A and 13B are diagrams showing a schematic configuration of a sheet inserted between U-phase and V-phase in the interleaf paper according to the second embodiment, wherein FIG. 13A is a plan view and FIG. 13B is a perspective view. .
FIG. 14 is a plan view showing a schematic configuration of an interleaf paper according to a second embodiment, which is inserted between a V phase and a W phase.
FIG. 15 is a cross-sectional view showing a cross section taken along line UU of a three-phase stator manufactured by using the interleaf paper shown in FIG. 3 when a molding amount of a coil end portion is increased.
FIG. 16 is a cross-sectional view showing a cross section taken along line VV of a three-phase stator manufactured by using the interleaving paper shown in FIG. 3 when a molding amount of a coil end portion is increased.
FIG. 17 is a cross-sectional view showing a cross section taken along line WW of a three-phase stator manufactured by using the interleaf paper shown in FIG. 3 when a molding amount of a coil end portion is increased.
FIG. 18 is a cross-sectional view showing a cross section taken along the line UU of a three-phase stator manufactured by using the interleaving paper shown in FIGS. 13 and 14 when the molding amount of the coil end portion is increased.
FIG. 19 is a cross-sectional view showing a cross section taken along line VV of a three-phase stator manufactured using the interleaving paper shown in FIGS. 13 and 14 when the molding amount of the coil end portion is increased.
FIG. 20 is a cross-sectional view showing a cross section taken along line WW of a three-phase stator manufactured by using the interleaving paper shown in FIGS. 13 and 14 when the molding amount of the coil end portion is increased.
FIG. 21 is a diagram showing a modification of the interleaf paper of FIG. 13;
FIG. 22 is a diagram showing a modification of the interleaf paper of FIG. 14;
[Explanation of symbols]
10 paper
20,30 flat part
21,31 convex part
40a, 40b leg
50 Stator
51U U-phase coil
51V V-phase coil
51W W phase coil
52 Stator core
53 slots
60UV, 60VW phase paper
61a, 61b Tsuba

Claims (8)

In the interphase paper for motor interphase insulation inserted between each coil phase to ensure interphase insulation of the motor,
Legs inserted into slots of the stator core,
A flat portion connected by the legs at both ends and projecting from both end surfaces of the stator core to perform insulation between the coil phases,
An interphase paper for motor interphase insulation, comprising: The interphase paper for motor interphase insulation according to claim 1,
The interphase paper for motor interphase insulation, wherein a width of the leg portion is larger than a slot width of the stator core. The interphase paper for motor interphase insulation according to claim 1 or 2,
Having a convex portion formed by bending the flat portion,
An interphase insulating paper for motor interphase, wherein an upper surface of the convex portion is inclined. The interphase paper for motor interphase insulation according to any one of claims 1 to 3,
A phase paper for motor interphase insulation, wherein a flange is integrally formed at an end of the flat portion on the stator side. The interphase paper for motor interphase insulation according to claim 4,
The interphase paper for motor interphase insulation, wherein the flange is formed partially or continuously. The phase paper for motor phase insulation according to claim 4 or claim 5,
A phase sheet for motor phase insulation, wherein a relationship of L2> L1 is established between a lead-side length L1 and a non-lead-side length L2 of the flange. 7. The interphase paper for motor interphase insulation according to claim 1, wherein:
The interphase paper for motor interphase insulation, wherein a height of the flat portion is set to be higher than a height of a coil end when the flat portion is inserted into the stator core. The insulation between the coil phases is ensured by disposing any one of the motor interphase insulating papers according to any one of claims 1 to 7 so that a part of the flat portion overlaps in the circumferential direction of the stator core. The stator characterized by the above.

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