Interphase insulation paper, motor, and assembly method of interphase insulation paper

Abstract

An interphase insulating paper is composed of a plurality of insulating papers 1 arranged in a circumferential manner in a stator core 2, and the plurality of insulating papers 1 are used to perform interphase insulation of each phase coil possessed by the stator core 2. The insulating paper 1 includes: a pair of legs 11, which are respectively inserted into a pair of slots 21 among a plurality of slots 21 formed in the stator core 2; and a pair of plane portions 12, which are connected to the pair of legs 11 and protrude from both end surfaces of the stator core 2 in the axial direction to perform interphase insulation of each phase coil, and the pair of legs 11 are connected to the central portion of the edge of the plane portion 12.

Description

Technical Field

[0001] The invention relates to interphase insulating paper, a motor and an assembling method of the interphase insulating paper. Background Art

[0002] JP2007-60819A discloses the following content, namely, regarding a three-phase motor, interphase insulating paper is provided for ensuring insulation between the U phase and the V phase, interphase insulating paper is provided for ensuring insulation between the V phase and the W phase, and interphase insulating paper is provided for ensuring insulation between the W phase and the U phase, and each interphase insulating paper is installed in a slot of the stator core. Summary of the invention

[0003] However, in JP2007-60819A, the interphase insulation papers respectively provided are sequentially installed in the slots of the stator core. Therefore, the interphase insulation papers installed first exert a force to push the interphase insulation papers installed later toward the inner circumference of the stator core, making installation of the interphase insulation papers difficult.

[0004] An object of the present invention is to provide an interphase insulation paper that is easily installed in a slot of a stator core, a motor having the interphase insulation paper, and an assembling method of the interphase insulation paper.

[0005] According to a certain embodiment of the present invention, interphase insulating paper is composed of a plurality of insulating papers arranged in a circumferential manner in a stator core, and the plurality of insulating papers are used to perform interphase insulation of each phase coil possessed by the stator core. The insulating paper includes: a pair of legs, which are respectively inserted into a pair of slots among a plurality of slots formed in the stator core; and a pair of plane portions, which are connected to the pair of legs and protrude from both axial end surfaces of the stator core to perform interphase insulation of each phase coil, and the pair of legs are connected to the central portion of the edge of the plane portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 This is a schematic diagram of the insulating paper constituting the interphase insulating paper of the present embodiment.

[0007] Figure 2 This is a diagram showing the insulating paper according to the present embodiment being attached to the stator core, developed in the circumferential direction of the stator core.

[0008] Figure 3 is a diagram for explaining the insulating paper constituting the interphase insulating paper of the comparative example, Figure 3 (a) is a plan view of the insulating paper of the comparative example, Figure 3 (b) is a diagram showing a situation where the insulating paper of the comparative example jumps out of the slot when the insulating paper is inserted into the stator core. Figure 3(c) is a diagram showing a situation in which, when the insulating paper of the comparative example is inserted into the stator core, the insulating paper inserted later receives the force from the insulating paper inserted earlier and jumps out of the slot.

[0009] Figure 4 It is a figure (model drawing) which shows the installation method of the insulating paper of a comparative example.

[0010] Figure 5 1 is a diagram showing an assembly process of interphase insulation paper according to the present embodiment. Figure 5 (a) is a diagram showing a state where a U-phase coil and insulating paper on the outer peripheral side are installed. Figure 5 (b) is a diagram showing a planar portion of the insulating paper on the outer peripheral side as viewed from the axial direction.

[0011] Figure 6 1 is a diagram showing an assembly process of interphase insulation paper according to the present embodiment. Figure 6 (a) is a diagram showing a state in which a V-phase coil is mounted in a slot into which a leg portion of an outer peripheral side insulating paper is inserted, and a leg portion of an inner peripheral side insulating paper is inserted in a slot into which a W-phase coil is mounted, Figure 6 (b) is a diagram showing a planar portion of the insulating paper on the inner peripheral side as viewed from the axial direction.

[0012] Figure 7 The diagram shows an assembly process of the interphase insulating paper according to the present embodiment, and shows a state in which the W-phase coil is attached to the slot into which the leg portion of the insulating paper on the inner circumference side is inserted.

[0013] Figure 8 It is a diagram (model drawing) showing the assembly process of the interphase insulation paper of this embodiment, and shows the state after the insulation paper on the inner peripheral side is inserted into the slot.

[0014] Fig. 9 1 is a diagram (modeling) showing the assembly process of the interphase insulating paper of the present embodiment, showing the insulating paper on the outer peripheral side after the V-phase coil is installed in the slot, and the state in which the V-phase coil is bent toward the outer peripheral side of the stator core, Fig. 9 (a) shows the case where there is no arc portion on the flat surface. Fig. 9 (b) shows a case where an arc portion exists on a flat surface portion.

[0015] Fig.10 1 is a diagram (model drawing) showing the assembly process of the interphase insulation paper of this embodiment. Fig.10 (a) shows the state before the insulating paper and each phase coil are bundled with wire. Fig.10 (b) shows the state after bundling. DETAILED DESCRIPTION

[0016] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0017] [Basic structure of the insulating paper 1 constituting the phase insulating paper]

[0018] Figure 1 Schematic diagram of the insulating paper 1 constituting the interphase insulating paper of the present embodiment. The interphase insulating paper of the present embodiment is composed of a plurality of insulating papers 1 installed in the slots 21 of the stator core 2 of the motor (not shown) in a manner surrounding the circumference of the stator core 2. The interphase insulating paper performs interphase insulation between the phase coils (U-phase coil U, V-phase coil V, W-phase coil W) installed on the stator core 2.

[0019] Here, the motor is used, for example, to drive a vehicle. In this case, the motor receives power from a power source such as a battery and rotates, and acts as a motor that drives the wheels of the vehicle. In addition, the motor also acts as a generator that generates electricity driven by an external force. That is, the motor becomes a so-called electric generator that acts as a motor and a generator. In addition, the motor may not be used as a motor for driving a vehicle, but as a driving source for a system other than the vehicle.

[0020] The insulating paper 1 of this embodiment has a shape in which two rectangular plane portions 12 are connected by two legs 11, and has a plane shape without projections and depressions before being attached to the stator core 2. The insulating paper 1 is, for example, a three-layer laminated material in which aramid fiber paper is laminated on both sides of a polyethylene terephthalate (PEN) film, and is formed by punching using a dedicated die.

[0021] The leg portion 11 is connected to the edge of the plane portion 12 and the center portion of the plane portion 12 in the longitudinal direction (circumferential direction of the stator core 2). The leg portion 11 is a portion having a length direction that is substantially the same as the axial length of the stator core 2 (slot 21), and a width direction that is, for example, less than or equal to the circumferential width of the position of the inner wall of the outermost circumference of the slot 21. The leg portion 11 is inserted from the slot of the slot 21.

[0022] The slots 13 are formed between the legs 11. The slots 13 are rectangular openings having a width greater than or equal to the circumferential width of the teeth 22 between the slots 21. When the legs 11 are inserted into the slots 21, the teeth 22 are inserted into the slots 13.

[0023] The flat surface portion 12 is a substantially rectangular member, and is formed so as to protrude from both ends of the axial direction of the stator core 2 when the leg portion 11 is inserted into the slot 21. The length direction of the flat surface portion 12 is orthogonal to the length direction of the leg portion 11, and when the leg portion 11 is inserted into the slot 21, the flat surface portion 12 is arranged along the circumferential direction of the stator core 2. The flat surface portion 12 is arranged so that the coil ends (the portions protruding from the slot 21) of the coils of each phase are insulated from each other.

[0024] The arc portion 15 is a cutout formed at an edge of the flat portion 12 that faces the stator core 2. The arc portion 15 is formed in an arc shape in accordance with the shape of a portion of the coil of each phase that protrudes from the slot 21.

[0025] The notch 14 (cutout) is disposed in the flat surface portion 12 and forms a portion of the short side of the long hole portion 13. The notch 14 is used for positioning of the wire 4 described later and for guiding the cutting of the flat surface portion 12.

[0026] Figure 2 1 is a diagram showing the insulating paper 1 of the present embodiment when it is mounted on the stator core 2, developed in the circumferential direction of the stator core 2. Figure 2 Only one axial side of the stator core 2 is shown, and the arrangement relationship between the coils of each phase and the insulating paper 1 is the same on the lead side (the side that processes the current relative to the outside) and the side opposite to the lead side.

[0027] The same-phase coils are mounted on the stator core 2 in a state where a plurality of coils are arranged in the circumferential direction (see Figure 7 ). Correspondingly, if Figure 2 As shown, the insulating paper 1 is installed in the same phase as the number of coils (8, refer to Figure 7 ) are arranged in the circumferential direction of the stator core 2 in the same number. In addition, the insulating papers 1 are arranged in such a manner that the planar portions 12 of the insulating papers 1 adjacent to each other in the circumferential direction overlap each other in the circumferential direction.

[0028] Therefore, if Figure 2 As shown, if the circumferential length of the planar portion 12 is set to A, and the circumferential offset of the adjacent insulating papers 1, that is, the circumferential interval between a pair of teeth 22 respectively inserted into the long hole portions 13 of the adjacent insulating papers 1 is set to B, the relationship A>B holds.

[0029] like Figure 2 As shown, the U-phase coil U (the coil of the first phase), the V-phase coil V (the coil of the second phase), and the W-phase coil W (the coil of the third phase) are arranged in a distributed winding manner on the stator core 2. The circumferential width of the U-phase coil U, the V-phase coil V, and the W-phase coil W is the same, for example, having a width of 6 slots 21 (a width across 5 teeth 22).

[0030] Furthermore, the V-phase coil V is circumferentially spaced relative to the U-phase coil U in one direction ( Figure 2 The W-phase coil W is disposed at a position displaced by an amount equivalent to the two slots 21, and the W-phase coil W is displaced relative to the U-phase coil U in one circumferential direction ( Figure 2 The left side is in the middle), and is arranged at a position displaced by an amount equivalent to four slots 21.

[0031] like Figure 2As shown, the insulating paper 1 is configured so that the teeth 22 sandwiched by a pair of V-phase coils V (other phases may also be) adjacent to each other in the circumferential direction are inserted into the long hole portion 13. In addition, as described later, the insulating paper 1 is configured so that the teeth 22 sandwiched by a pair of W-phase coils W (other phases may also be) adjacent to each other in the circumferential direction are inserted into the long hole portion 13.

[0032] like Figure 1 as well as Figure 2 As shown, the insulating paper 1 has a bilaterally symmetrical shape by connecting the leg 11 to the center of the plane 12 in the longitudinal direction. However, the leg 11 may be connected to a position displaced from the center of the plane 12 in the longitudinal direction to one side in the longitudinal direction, so that the insulating paper 1 has an asymmetrical shape.

[0033] In addition, in the insulating paper 1 , the pair of leg portions 11 are arranged so as to sandwich one tooth 22 , but a structure in which the leg portions 11 are connected to the flat surface portion 12 so as to straddle two or more teeth 22 may be adopted.

[0034] Furthermore, regardless of the number of coils of each phase, the circumferential length of the planar portion 12 of the insulating paper 1 can be set so that the planar portions 12 of a pair of adjacent insulating papers 1 overlap each other in the circumferential direction when a plurality of insulating papers 1 are installed in a manner surrounding the circumference of the stator core 2.

[0035] [Comparative Example Interphase Insulation Paper]

[0036] Figure 3 1 is a diagram for explaining insulating paper 1X constituting interphase insulating paper of a comparative example. Figure 3 (a) is a plan view of an insulating paper 1X of a comparative example, Figure 3 (b) is a diagram showing a situation where the insulating paper 1X of the comparative example jumps out of the slot 21 when the insulating paper 1X is inserted into the stator core 2. Figure 3 (c) is a diagram showing a situation in which, when the insulating paper 1X of the comparative example is inserted into the stator core 2, the insulating paper 1X inserted later receives a force from the insulating paper 1X inserted earlier and jumps out of the slot 21. Figure 4 It is a figure (model drawing) which shows the installation method of the insulating paper 1X of a comparative example.

[0037] exist Figure 3 (b) and Figure 3 In (c), the illustration of each phase coil is omitted. Figure 4 The figure shows a case where the insulating paper 1X of the comparative example is installed after the V-phase coil V is installed.

[0038] like Figure 3As shown in (a), the insulating paper 1X of the comparative example is similar to the insulating paper 1 of the present embodiment, and a plurality of insulating papers are installed in the slots 21 in a manner surrounding the circumference of the stator core 2 to form interphase insulating paper. In addition, the insulating paper 1X has a plane portion 12 and a leg portion 16, and the leg portion 16 is respectively arranged at both ends of the plane portion 12 in the longitudinal direction (circumferential direction).

[0039] The insulating paper 1X of the comparative example is the same as the insulating paper disclosed in the aforementioned JP2007-60819A. The insulating paper 1X of the comparative example is installed on the stator core 2 in a state where a plurality (eight) of insulating paper are arranged in the circumferential direction of the stator core 2 (see Figure 4 ), the adjacent insulating papers 1X are installed so as to overlap each other in the circumferential direction corresponding to one slot 21 (refer to Figure 3 (c)).

[0040] As the order of installing the coils of each phase and the insulating paper 1X on the stator core 2, for example, a plurality of U-phase coils U (it may also start from the coils of other phases) are installed on the stator core 2 in a manner of surrounding in the circumferential direction, and a plurality of insulating papers 1X are installed on the stator core 2 in a manner of surrounding in the circumferential direction. Next, after the U-phase coil U (coil end) and the flat portion 12 of the insulating paper 1X are bent toward the outer circumference of the stator core 2, a plurality of V-phase coils V are installed on the stator core 2 in a manner of surrounding in the circumferential direction, and a plurality of insulating papers 1X are installed on the stator core 2 in a manner of surrounding in the circumferential direction. Furthermore, after the V-phase coil V (coil end) and the flat portion 12 of the insulating paper 1X installed later are bent toward the outer circumference of the stator core 2, a plurality of W-phase coils W are installed on the stator core 2 in a manner of surrounding in the circumferential direction (see Figure 5-Figure 7 ).

[0041] The insulating paper 1X of the comparative example is flat in the initial state, and the coil end after molding has a complicated shape. Therefore, when the insulating paper 1X is installed in the slot 21, the insulating paper 1X as a whole will not be retained in the circumferential direction of the stator core 2, and it can be moved to the inner diameter side of the stator core 2 (refer to Figure 3 (b) and Figure 4 As a result, the leg portion 16 of the insulating paper 1X jumps out of the slot 21 of the stator core 2, and a problem occurs in which the coil of the next phase cannot be inserted (see Figure 4 (enlarged image above).

[0042] When the insulating paper 1X of the comparative example is inserted into the stator core 2, it is deformed into an arc or an S-shape, so that the leg 16 of the insulating paper 1X is twisted and the leg 16 is oriented in a direction that makes it easy to jump out of the slot 21. In this case, there is a problem that the insulating paper 1X inserted later is pressed by the insulating paper 1X inserted earlier, so that the leg 16 jumps out of the slot 21 (see Figure 3 (c), and Figure 4 (enlarged image below).

[0043] In addition, for the reasons described above, there is a problem that the insulating paper 1X installed once jumps out toward the inner diameter side of the stator core 2 until the coil is inserted in the next step, and the insulating paper 1X is separated from between the coils or the insulating paper 1X is misaligned.

[0044] As described above, in order to prevent the insulating paper 1X from jumping out to the inner diameter side, it is necessary to hold the insulating paper 1X using a jig or a tape, which causes a problem of excessive jig costs and work man-hours.

[0045] However, when the insulating paper 1X is assembled to the stator core 2, the insulating paper 1X is inserted between the coil of the first phase (U-phase coil U) and the coil of the second phase (V-phase coil V), and between the coil of the second phase (V-phase coil V) and the coil of the third phase (W-phase coil W), and is deformed into a three-dimensional shape at each insertion position.

[0046] Therefore, in order to reduce the jumping out of the insulating paper 1X to the inner diameter side, the following scheme is also considered, that is, the insulating paper 1X is pre-set with a fold corresponding to the insertion position of the stator core 2 to form a three-dimensional shape. However, the three-dimensional shape of the insulating paper 1X between the coil of the first phase (U phase coil U) and the coil of the second phase (V phase coil V), and the three-dimensional shape of the insulating paper 1X between the coil of the second phase (V phase coil V) and the coil of the third phase (W phase coil W) are different from each other, so at least two three-dimensional shapes need to be formed in advance. Therefore, the assembly process becomes complicated, and the cost is consumed by the need to form a fixture for the three-dimensional shape.

[0047] However, in this embodiment, as described below, jumping out of the leg portion 11 and positional displacement of the insulating paper 1 can be suppressed without a jig or the like, and the insulating paper 1 can be attached to the slot 21 of the stator core 2 without forming a three-dimensional shape in advance.

[0048] [Insulating paper 1 assembly process]

[0049] Figure 5 1 is a diagram showing an assembly process of interphase insulation paper according to the present embodiment. Figure 5 (a) is a diagram showing a state where a U-phase coil U and an insulating paper 1 on the outer peripheral side are installed. Figure 5(b) is a diagram showing the flat surface portion 12 of the insulating paper 1 on the outer peripheral side as viewed from the axial direction. Figure 6 1 is a diagram showing an assembly process of interphase insulating paper according to the present embodiment, Figure 6 (a) is a diagram showing a state in which the V-phase coil V is mounted in the slot 21 into which the leg 11 of the insulating paper 1 on the outer circumference side is inserted, and the leg 11 of the insulating paper 1 on the inner circumference side is inserted in the slot 21 into which the W-phase coil W is mounted, Figure 6 (b) is a diagram showing the flat surface portion 12 of the insulating paper 1 on the inner peripheral side as viewed from the axial direction. Figure 7 1 is a diagram showing the assembly process of the interphase insulating paper of the present embodiment, and is a diagram showing a state where the W-phase coil W is mounted in the slot 21 into which the leg portion 11 of the insulating paper 1 on the inner circumference side is inserted. Figures 5 to 7 In the figure, the coil ends of the coils of each phase are omitted.

[0050] like Figure 5 As shown, the stator core 2 to which the insulating paper 1 of this embodiment is applied has 48 slots 21 and teeth 22. In addition, eight U-phase coils U (U1 to U8), eight V-phase coils V (V1 to V8), and eight W-phase coils W (W1 to W8) are prepared and mounted in the slots 21.

[0051] like Figure 5 As shown in (a), the U-phase coil U (U1 to U8) is mounted in the slot 21, and the leg portion 11 of the insulating paper 1 ((1) to (8)) (first interphase insulating paper) is inserted into the slot 21 where the V-phase coil V is mounted.

[0052] At this time, the leg 11 of the insulating paper 1 (1) is inserted into the slot 21 (V1) and the slot 21 (V2). Here, for ease of illustration, the leg 11 is shown in a position separated from the slot 21 (V1) and the slot 21 (V2), and the same applies below.

[0053] Similarly, the foot 11 of the insulating paper 1 (2) is inserted into the slot 21 (V2) and the slot 21 (V3), the foot 11 of the insulating paper 1 (3) is inserted into the slot 21 (V3) and the slot 21 (V4), and the foot 11 of the insulating paper 1 (4) is inserted into the slot 21 (V4) and the slot 21 (V5).

[0054] Similarly, the foot 11 of the insulating paper 1 (5) is inserted into the slot 21 (V5) and the slot 21 (V6), the foot 11 of the insulating paper 1 (6) is inserted into the slot 21 (V6) and the slot 21 (V7), the foot 11 of the insulating paper 1 (7) is inserted into the slot 21 (V7) and the slot 21 (V8), and the foot 11 of the insulating paper 1 (8) is inserted into the slot 21 (V8) and the slot 21 (V1).

[0055] At this time, the leg portion 11 of the insulating paper 1 ((1) to (8)) is arranged on the inner wall side of the outermost periphery of the slot 21, so that the portion of the flat portion 12 that overlaps with the U-phase coil U in the circumferential direction is bent toward the inner circumference of the stator core 2, and the flat portion 12 is on one side in the circumferential direction ( Figure 5 (b) is the right side of the flat portion 12) so as to be bent so as to cover the inner circumference of the coil end of the U-phase coil U, thereby deforming the insulating paper 1 into Figure 5 (b) The three-dimensional shape shown.

[0056] Then, in order to install the next V-phase coil V, the coil end of the U-phase coil U and the flat portion 12 of the insulating paper 1 ((1) to (8)) are bent toward the outer circumference of the stator core 2 (see Fig. 9 ).

[0057] like Figure 6 As shown in (a), the V-phase coil V (V1 to V8) is mounted in the slot 21, and the leg portion 11 of the insulating paper 1 ((9) to (16)) (second interphase insulating paper) is inserted into the slot 21 where the W-phase coil W is mounted.

[0058] At this time, the foot 11 of the insulating paper 1 (9) is respectively inserted into the slot 21 (W1) and the slot 21 (W2), the foot 11 of the insulating paper 1 (10) is respectively inserted into the slot 21 (W2) and the slot 21 (W3), the foot 11 of the insulating paper 1 (11) is respectively inserted into the slot 21 (W3) and the slot 21 (W4), and the foot 11 of the insulating paper 1 (12) is respectively inserted into the slot 21 (W4) and the slot 21 (W5).

[0059] Similarly, the foot 11 of the insulating paper 1 (13) is inserted into the slot 21 (W5) and the slot 21 (W6), the foot 11 of the insulating paper 1 (14) is inserted into the slot 21 (W6) and the slot 21 (W7), the foot 11 of the insulating paper 1 (15) is inserted into the slot 21 (W7) and the slot 21 (W8), and the foot 11 of the insulating paper 1 (16) is inserted into the slot 21 (W8) and the slot 21 (W1).

[0060] At this time, the leg portion 11 of the insulating paper 1 ((9) to (16)) is arranged on the inner wall side of the outermost periphery of the slot 21, so that the portion of the flat portion 12 that overlaps with the U-phase coil U and the V-phase coil V in the circumferential direction is bent toward the inner periphery of the stator core 2, and is bent in a manner that covers the inner periphery of the coil end of the U-phase coil U and the inner periphery of the coil end of the V-phase coil V, thereby deforming the insulating paper 1 into Figure 6 (b) The three-dimensional shape shown.

[0061] Then, in order to install the next W-phase coil W, the coil end of the V-phase coil V and the flat portion 12 of the insulating paper 1 ((9) to (16)) are bent toward the outer circumference of the stator core 2 (see Fig. 9 ). Moreover, if Figure 7 As shown, the W-phase coils W ( W1 to W8 ) are mounted in the slots 21 , thereby completing the process of assembling the coils of each phase and the insulating paper 1 to the stator core 2 .

[0062] Then, using the insulating wire 4 (refer to Fig.10 ) The coil ends of the U-phase coil U are bundled, the coil ends of the V-phase coil V and the insulating paper 1 on the outer peripheral side ((1) to (8)) are bundled with the wire 4, and the coil ends of the W-phase coil W and the insulating paper 1 on the inner peripheral side ((9) to (16)) are bundled with the wire 4, and then varnish is applied to each phase coil (not shown).

[0063] [State of the insulating paper 1 during the assembly process]

[0064] Figure 8 2 is a diagram (model drawing) showing the assembly process of the interphase insulation paper of this embodiment, showing the state after the insulation paper 1 on the inner peripheral side is inserted into the slot 21. Figure 8 In the embodiment, the flat portion 12 of the insulating paper 1 ((1) to (8)) on the outer peripheral side is bent toward the outer peripheral side together with the V-phase coil V.

[0065] About insulation paper 1, such as Figure 1 As shown in FIG. 1 , the plane portion 12 is connected to the leg portion 11 at the center of the circumference, so the movement of the center of the plane portion 12 in the circumference is restricted by the leg portion 11, but the other parts can be deformed freely. Figure 8 As shown, the planar portion 12 of the insulating paper 1 can be deformed without being damaged. In addition, as described above, if the circumferential length of the planar portion 12 is set to A, and the circumferential interval of a pair of teeth 22 respectively inserted into the long hole portions 13 of the insulating paper 1 adjacent to each other is set to B, the relationship A>B holds.

[0066] Therefore, if Figure 8 As shown, even if the insulating paper 1 ((1) to (8)) arranged on the outer peripheral side (refer to Figure 7 ) is bent toward the outer peripheral side of the stator core 2 together with the U-phase coil U, and the planar portions 12 of the insulating paper 1 adjacent to each other in the circumferential direction can be maintained in a state of overlapping each other in the circumferential direction, thereby maintaining the insulation between the U-phase coil U and the V-phase coil V.

[0067] Similarly, even if the insulating paper 1 ((9) to (16)) arranged on the inner circumference side (see Figure 7) is bent toward the outer peripheral side of the stator core 2 together with the V-phase coil V, and the planar portions 12 of the insulating paper 1 adjacent to each other in the circumferential direction can be maintained in a state of overlapping with each other in the circumferential direction, thereby maintaining the insulation between the V-phase coil V and the W-phase coil W.

[0068] In addition, if Figure 8 As shown, it can be seen that the insulating paper 1 ((9) to (16)) arranged on the inner circumference side Figure 7 ) does not jump out of the slot 21. This is different from the insulating paper 1 ((1) to (8)) arranged on the outer side. Figure 7 )Same.

[0069] Regarding the insulating paper 1 of the present embodiment, the circumferential central portion of the insulating paper 1 (the circumferential central portion of the plane portion 12 and the leg portion 11) is hardly deformed before and after the slot 21 is installed, and the pair of legs 11 can be reliably inserted into the pair of adjacent slots 21. Therefore, the restoring force that may be generated by the deformation of the plane portion 12 and the leg portion 11 can be reduced. Therefore, the insulating paper 1 does not rotate when it is installed on the stator core 2, and only the leg portion 11 is installed in the slot 21 to form a semi-fixed state relative to the stator core 2.

[0070] In addition, in Figure 5 (b) Figure 6 When the plane portion 12 is deformed as shown in (b), the circumferential center portion of the insulating paper 1 (the circumferential center portion of the plane portion 12 and the leg portion 11) is also almost not deformed and not displaced. Specifically, regarding the leg portion 11, the width direction of the leg portion 11 is opposite to the slot of the slot 21 and is not deformed, and the circumferential center portion of the plane portion 12 is almost not deformed toward the inner circumference of the stator core 2, so the leg portion 11 is almost not displaced toward the slot side of the slot 21. Therefore, it is possible to reduce the leg portion 11 from jumping out of the slot of the slot 21.

[0071] Fig. 9 1 is a diagram (modeling) showing the assembly process of the interphase insulating paper of the present embodiment, showing a state where the insulating paper 1 on the outer peripheral side and the V-phase coil V are bent toward the outer peripheral side of the stator core 2 after the V-phase coil V is installed in the slot 21. Fig. 9 (a) shows the case where the arc portion 15 does not exist on the flat portion 12. Fig. 9 (b) shows a case where the arc portion 15 exists on the flat surface portion 12 .

[0072] As described above, after the assembly process of each phase coil and the insulating paper 1 to the stator core 2, the wire 4 (see Fig.10 ) The coil ends of each phase coil are bundled, and then varnish is applied to each phase coil, but Fig. 9 Wire 4 is omitted.

[0073] In this embodiment, the insulating paper 1 does not exist Figure 1 In the case where the arc portion 15 is shown and the plane portion 12 is rectangular, as shown in FIG. Fig. 9 As shown in (a), both ends of the insulating paper 1 in the circumferential direction excessively cover the coil ends of the U-phase coil U, so that the application of varnish to the U-phase coil U may become complicated.

[0074] However, when the insulating paper 1 (insulating paper 1 (1) to (8) ( Figure 8 )) is installed in the stator core 2, such as Fig. 9 As shown in (b), the area covered by the plane portion 12 of the coil end of the U-phase coil U can be reduced, so that interference by the plane portion 12 can be reduced when applying varnish, and varnish can be applied efficiently.

[0075] Similarly, in the case where the insulating paper 1 ((9) to (16)) having the arc portion 15 is installed Figure 7 ), the area covered by the plane portion 12 on the coil end of the V-phase coil V can be reduced, so that the hindrance of the plane portion 12 can be reduced when applying varnish, and the varnish can be applied efficiently.

[0076] Fig.10 1 is a diagram (model drawing) showing the assembly process of the interphase insulation paper of this embodiment. Fig.10 (a) shows the state before the insulating paper 1 and the coils of each phase are bundled with the wire 4. Fig.10 (b) shows the state after bundling. Fig.10 2 shows a state where the U-phase coil U and the insulating paper 1 are bundled.

[0077] like Fig.10 As shown in (a), in the insulating paper 1 (in Fig.10 In the insulating paper 1 (1) and the insulating paper 1 (9)), the flat portion 12 is formed into a long hole portion 13 ( Figure 1 ) is provided with a notch 14 (cutout). When the coils of each phase and the insulating paper 1 are bundled with the wire 4, the wire 4 is stopped in the notch 14.

[0078] Therefore, if Fig.10 As shown in (b), if 4 pairs of wires are used for each phase coil ( Fig.10 The U phase coil (U) and the insulating paper 1 are bundled, and the portion of the wire 4 that is stuck in the notch 14 is directed toward the coil end of each phase coil in a straight line ( Fig.10 (b) moves upward), but a cut is produced in the plane portion 12 with the notch 14 as a starting point preferentially along the direction in which the wire 4 moves, and the cut is formed to extend toward the coil end side in imitation of the trajectory of the wire 4 movement.

[0079] Even in this state, the flat surface portion 12 is not divided in the circumferential direction, and thus the insulation between the coils of each phase can be maintained by the flat surface portion 12 .

[0080] Therefore, when the coils of each phase and the insulating paper 1 are bundled with the wire 4 , for example, the leg portion 11 can be prevented from being cut, and a cut can be formed in the insulating paper 1 in an intended direction.

[0081] [Effects of this embodiment]

[0082] According to the interphase insulating paper of this embodiment, it is composed of a plurality of insulating papers 1 arranged in a circumferential manner in the stator core 2, and the plurality of insulating papers 1 are used to perform interphase insulation of each phase coil possessed by the stator core 2. The insulating paper 1 includes: a pair of legs 11, which are respectively inserted into a pair of slots 21 among a plurality of slots 21 formed in the stator core 2; and a pair of planar portions 12, which are connected to the pair of legs 11 and protrude from the two axial end surfaces of the stator core 2 to perform interphase insulation of each phase coil, and the pair of legs 11 are connected to the central portion of the edge of the planar portion 12.

[0083] According to the above structure, before and after the insulating paper 1 is installed relative to the slot 21, the circumferential center of the insulating paper 1 (the circumferential center of the plane portion 12 and the leg portion 11) is hardly deformed, and the pair of legs 11 can be reliably inserted into the pair of adjacent slots 21. Therefore, the restoring force that may be generated by the deformation of the plane portion 12 and the leg portion 11 can be reduced.

[0084] In addition, when the plane portion 12 is deformed to imitate the shape of the coil end of each phase coil, the circumferential center portion of the insulating paper 1 (the circumferential center portion of the plane portion 12 and the leg portion 11) is also almost not deformed and does not displace. Specifically, with respect to the leg portion 11, the width direction of the leg portion 11 is opposite to the slot of the slot 21 and is not deformed, and the circumferential center portion of the plane portion 12 is almost not deformed toward the inner circumference of the stator core 2, so the leg portion 11 is almost not displaced toward the slot side of the slot 21. Therefore, it is possible to reduce the jumping out of the slot of the slot 21, and form the insulating paper 1 that is easy to install the stator core 2 into the slot 21.

[0085] In this embodiment, when the circumferential length of the planar portion 12 is set to A and the circumferential offset of a pair of insulating papers 1 adjacent to each other when the insulating papers 1 are mounted on the stator core 2 is set to B, the relationship A>B is satisfied, so that the planar portions 12 of the pair of insulating papers 1 adjacent to each other overlap each other. Thus, interphase insulation of each phase coil (coil end) can be reliably performed.

[0086] In the present embodiment, the insulating paper 1 has a flat shape before being attached to the stator core 2. This makes it possible to easily manage the insulating paper 1.

[0087] In this embodiment, a long hole (long hole portion 13) imitating the outer shape of the teeth 22 between the pair of slots 21 is formed between the pair of legs 11, and the teeth 22 are inserted into the long hole (long hole portion 13). Thus, the legs 11 can be stably inserted into the slots 21.

[0088] In this embodiment, a notch (notch 14) is provided at the plane portion 12 at a position that becomes the short side of the long hole (long hole portion 13). Thus, when the insulating paper 1 and each phase coil (coil end) are bundled with the wire 4, a notch can be formed in the plane portion 12 in an intended direction.

[0089] In the present embodiment, when the leg 11 is inserted into the slot 21, the edge of the plane portion 12 facing the stator core 2 has an arc shape (arc portion 15), that is, it extends from the position of the edge that becomes the root of the leg 11 in a direction perpendicular to the length direction of the leg 11, and separates from the stator core 2 as it approaches the end of the plane portion 12 from the midway position, and protrudes in the direction of separation from the stator core 2. As a result, when varnish is applied to each phase coil after the insulating paper 1 and each phase coil are assembled to the stator core 2, the area of ​​each phase coil excessively covered by the plane portion 12 can be reduced, so that the obstruction caused by the plane portion 12 when applying the varnish can be reduced, and the varnish can be applied effectively.

[0090] According to the motor of this embodiment, the insulating paper 1 is assembled together with the coils of each phase to the stator core 2. Thus, the motor can easily and reliably perform interphase insulation of the coils of each phase.

[0091] In this embodiment, the number of insulating papers 1 circumferentially mounted on the stator core 2 is set to be equal to the number of coils of the same phase mounted in a state where a plurality of coils are arranged circumferentially around the stator core 2 .

[0092] Thus, the interphase insulation of each phase coil (coil end) can be reliably performed. In addition, the number of insulating papers 1 can be reduced, and when the insulating paper 1 and each phase coil are assembled to the stator core 2, in the subsequent step of inserting the leg 11 into the slot 21, the each phase coil can be installed in the slot 21 and the slot of the slot 21 can be closed. Therefore, the time from inserting the leg 11 into the slot 21 to closing the slot of the slot 21 can be shortened, and the leg 11 can be reduced from jumping out of the slot of the slot 21.

[0093] In the present embodiment, when the first phase coil (U phase coil U), the second phase coil (V phase coil V) and the third phase coil (W phase coil W) which are different from each other are respectively installed on the stator core 2 in a state where a plurality of them are arranged in the circumferential direction, the insulating paper 1 is the first insulating paper (insulating paper 1 ((1) to (8))) and the second insulating paper (insulating paper 1 ((9) to (16))), and with respect to the first insulating paper (insulating paper 1 ((1) to (8))), the leg 11 is respectively The planar portion 12 is inserted into a pair of slots 21 in which a pair of second-phase coils (V-phase coils V) adjacent to each other in the circumferential direction are respectively installed, and one side of the planar portion 12 in the circumferential direction is sandwiched between the first-phase coil (U-phase coil U) and the second-phase coil (V-phase coil V), and the other side of the planar portion 12 in the circumferential direction is sandwiched between the third-phase coil (W-phase coil W) and the first-phase coil (U-phase coil U). Regarding the second insulating paper (insulating paper 1 ((9) to (16))), it is configured to be thinner than the first insulating paper. The insulation paper (insulating paper 1 ((1) to (8))) is closer to the inner circumference of the stator core 2, the leg portions 11 are respectively inserted into a pair of slots 21 in which a pair of third-phase coils (W-phase coils W) adjacent to each other in the circumferential direction are respectively installed, and one side of the plane portion 12 in the circumferential direction is sandwiched between the second-phase coil (V-phase coil V) and the third-phase coil (W-phase coil W), and the other side of the plane portion 12 in the circumferential direction is sandwiched between the third-phase coil (W-phase coil W) and the first-phase coil (U-phase coil U) A plurality of first insulating papers (insulating papers 1 ((1) to (8))) are arranged in a circumferential manner, and the first insulating papers (insulating papers 1 ((1) to (8))) adjacent to each other in the circumferential direction overlap each other in the circumferential direction, and a plurality of second insulating papers (insulating papers 1 ((9) to (16))) are arranged in a circumferential manner, and the second insulating papers (insulating papers 1 ((9) to (16))) adjacent to each other in the circumferential direction overlap each other in the circumferential direction.

[0094] The first insulating paper (insulating paper 1 ((1) to (8))) and the second insulating paper (insulating paper 1 ((9) to (16))) are deformed into different shapes when mounted on the stator core 2, but can be formed from the same insulating paper 1. Therefore, the first insulating paper (insulating paper 1 ((1) to (8))) and the second insulating paper (insulating paper 1 ((9) to (16))) can be formed from one type of insulating paper 1, thereby reducing costs.

[0095] According to the interphase insulating paper assembly method of the present embodiment, the first phase coil (U phase coil U), the second phase coil (V phase coil V), and the third phase coil (W phase coil W) which are different from each other are respectively installed on the stator core 2 in a state where a plurality of them are arranged in the circumferential direction, and a plurality of insulating papers 1 are installed in a circumferential manner with respect to the stator core 2 to perform interphase insulation for the first phase coil (U phase coil U), the second phase coil (V phase coil V), and the third phase coil (W phase coil W). In this case, the insulating paper 1 The invention comprises: a pair of legs 11, which are respectively inserted into a pair of slots 21 among a plurality of slots 21 formed in the stator core 2; and a pair of plane portions 12, which are connected to the pair of legs 11 and protrude from both end surfaces of the stator core 2 in the axial direction to insulate the phases of the coils of each phase, wherein the pair of legs 11 are connected to the central portion of the edge of the plane portion 12, and the circumferential length of the plane portion 12 is set such that when the insulating paper 1 is mounted on the stator core 2, the plane portions 12 of the pair of insulating papers 1 adjacent to each other overlap each other in the circumferential direction, relative to the stator core The number of sheets of insulating paper 1 installed in a circumferentially surrounding manner is set to be the same as the number of coils of the same phase installed in a state where a plurality of coils are arranged in a circumferentially surrounding manner on the stator core 2, wherein after the first phase coil (U phase coil U) is installed on the stator core 2, the leg portions 11 are respectively inserted into a pair of adjacent slots 21 in which a pair of second phase coils (V phase coil V) adjacent to each other in the circumferential direction are respectively installed, so that the leg portions 11 overlap with the first phase coil (U phase coil U) in the circumferential direction in the plane portion 12. The portion is bent toward the inner circumference of the stator core 2. After the coil of the second phase (V-phase coil V) is installed on the stator core 2 and before the coil of the third phase (W-phase coil W) is installed on the stator core 2, the leg portions 11 are respectively inserted into a pair of adjacent slots 21 in which a pair of circumferentially adjacent third-phase coils (W-phase coil W) are respectively installed, so that the portion of the plane portion 12 that overlaps with the coil of the first phase (U-phase coil U) and the coil of the second phase (V-phase coil V) in the circumferential direction is bent toward the inner circumference of the stator core 2.

[0096] According to the above method, before and after the insulating paper 1 is installed relative to the slot 21, the circumferential central portion of the insulating paper 1 (the circumferential central portion of the plane portion 12 and the leg portion 11) is hardly deformed, and the pair of legs 11 can be reliably inserted into the pair of adjacent slots 21. Therefore, the restoring force that may be generated by the deformation of the plane portion 12 and the leg portion 11 can be reduced.

[0097] In addition, when the plane portion 12 is deformed to imitate the shape of the coil end of each phase coil, the circumferential center portion of the insulating paper 1 (the circumferential center portion of the plane portion 12 and the leg portion 11) is almost not deformed and does not displace. Specifically, with respect to the leg portion 11, the width direction of the leg portion 11 is opposite to the slot of the slot 21 and is not deformed, and the circumferential center portion of the plane portion 12 is almost not deformed toward the inner circumference of the stator core 2, so the leg portion 11 is almost not displaced toward the slot side of the slot 21. Therefore, it is possible to reduce the leg portion 11 from jumping out of the slot 21, and it becomes easy to install the insulating paper 1 into the slot 21 of the stator core 2.

[0098] The embodiments of the present invention have been described above, but the above embodiments are merely examples of application of the present invention, and the technical scope of the present invention is not limited to the specific structures of the above embodiments. In addition, the above embodiments can be combined as appropriate.

Claims

1. A motor, wherein a plurality of first-phase coils, second-phase coils, and third-phase coils that are different from each other are arranged in a circumferential direction on a stator core, and a plurality of insulating papers are installed to insulate the phases of the coils of each phase, wherein the insulating papers include: a pair of legs, which are respectively inserted into a pair of slots among a plurality of slots formed in the stator core; and a pair of plane portions, which are connected to the pair of legs and protrude from both end surfaces of the stator core in the axial direction to insulate the phases of the coils of each phase, wherein the pair of legs are connected to the central portion of the edge of the plane portion and are configured to sandwich a tooth arranged between the slots adjacent to each other, in, The insulating paper is a first insulating paper and a second insulating paper, Regarding the first insulating paper, the legs are respectively inserted into a pair of slots in which a pair of coils of the second phase adjacent to each other in the circumferential direction are respectively installed, and one side of the circumferential direction of the planar portion is sandwiched between the coils of the first phase and the coils of the second phase, and the other side of the circumferential direction of the planar portion is sandwiched between the coils of the third phase and the coils of the first phase, The second insulating paper is arranged closer to the inner circumference of the stator core than the first insulating paper, the legs are respectively inserted into a pair of slots in which a pair of coils of the third phase adjacent to each other in the circumferential direction are respectively installed, and one side of the circumferential direction of the planar portion is sandwiched between the coil of the second phase and the coil of the third phase, and the other side of the circumferential direction of the planar portion is sandwiched between the coil of the third phase and the coil of the first phase, The first insulating paper is arranged in a plurality in a circumferential direction, and the first insulating paper adjacent to each other in the circumferential direction overlap each other in the circumferential direction. The second insulating papers are arranged in a plurality so as to surround the circumferential direction, and the second insulating papers adjacent to each other in the circumferential direction are arranged so as to overlap each other in the circumferential direction.

2. The motor according to claim 1, wherein: When the circumferential length of the planar portion is set to A and the circumferential offset of a pair of adjacent insulating papers when the insulating papers are installed on the stator core is set to B, the relationship A>B is satisfied, so that the planar portions of the pair of adjacent insulating papers overlap with each other.

3. The motor according to claim 1 or 2, wherein: The insulating paper is in a flat shape before being attached to the stator core.

4. The motor according to claim 1 or 2, wherein: A long hole imitating the outer shape of the teeth between the pair of slots is formed between the pair of legs, and the teeth are inserted into the long hole.

5. The motor according to claim 4, wherein: The flat surface portion has a cutout at a position that becomes a short side of the long hole.

6. The motor according to claim 1 or 2, wherein: When the foot is inserted into the slot, the edge of the planar portion opposite to the stator core has an arc shape, that is, it extends from a position where the edge becomes the root of the foot in a direction perpendicular to the length direction of the foot, and separates from the stator core as it moves from a midway position toward an end of the planar portion, and protrudes in a direction away from the stator core.

7. The motor according to claim 1 or 2, wherein: The number of the insulating papers mounted around the stator core in a circumferential direction is set to be the same as the number of coils of the same phase mounted in a plurality of rows around the stator core in a circumferential direction.

8. A method for assembling interphase insulating paper, wherein a plurality of mutually different first-phase coils, second-phase coils, and third-phase coils are respectively installed on a stator core in a state where they are arranged in a circumferential direction, and a plurality of insulating papers are installed in a circumferential manner relative to the stator core to perform interphase insulation for the first-phase coils, the second-phase coils, and the third-phase coils, wherein the insulating paper comprises: a pair of legs, which are respectively inserted into a pair of the slots among a plurality of slots formed in the stator core; and a pair of planar portions, which are connected to the pair of legs and extend from the axial direction of the stator core. The two end surfaces of the insulating paper protrude to insulate the phases of the coils of each phase, a pair of the legs are connected to the central part of the edge of the planar portion, and are configured to sandwich a tooth arranged between the adjacent slots, the circumferential length of the planar portion is set so that when the insulating paper is installed on the stator core, the planar portions of a pair of adjacent insulating papers overlap each other in the circumferential direction, and the number of sheets of the insulating paper installed in a circumferential manner relative to the stator core is set to be the same as the number of coils of the same phase installed in a state where a plurality of coils are arranged in a circumferential manner on the stator core, wherein, After the coil of the first phase is mounted on the stator core so that the coil end of the first phase is bent toward the outer circumference of the stator core, the leg portions are respectively inserted into a pair of adjacent slots in which a pair of coils of the second phase adjacent to each other in the circumferential direction are respectively mounted so that a portion of the planar portion overlapping with the coil of the first phase in the circumferential direction is bent toward the inner circumference of the stator core. When the coil of the second phase is mounted on the stator core, the coil end of the coil of the second phase and a portion of the flat portion facing the coil end are bent toward the outer peripheral side of the stator core. After the coil of the second phase is installed on the stator core and before the coil of the third phase is installed on the stator core, the leg portions are respectively inserted into a pair of adjacent slots in which a pair of circumferentially adjacent coils of the third phase are respectively installed, so that a portion of the planar portion that overlaps with the coil of the first phase and the coil of the second phase in the circumferential direction is bent toward the inner circumference of the stator core.

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