JP2018174674A - Stator of rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator of a rotary electric machine capable of forming a winding pattern regardless of the number of slot coils arranged in a slot. A stator 10 of a rotating electric machine includes a stator core 21, a segmented U-phase coil 50U, a V-phase coil 50V, and a W-phase coil 50W. Insulating plates 311R to 313R and 311L to 313L having the same number of through holes 32 as the number of slots 23 of the stator core 21 are provided on both sides of the stator core 21, and the slot coils 26 located at the same radial position in the slot 23. To 28 are connected by the connecting plates 40 arranged on the insulating plates 311R to 313R and the insulating plates 311L to 313L arranged on both sides of the stator core 21. [Selection diagram] Fig. 7

Description

  The present invention relates to a stator for a rotating electrical machine that can be mounted on an electric vehicle, a hybrid vehicle, or the like.

  In Patent Document 1, as a stator of a rotating electrical machine, as shown in FIGS. 13 and 14, a slot coil 125 disposed in a slot 123 of a stator core 121 and insulating plates 131L and 131R disposed outside the stator core 121 are accommodated. A rotating electrical machine 100 in which a coil loop is formed by joining a connecting coil 140 is proposed.

International Publication No. 2015/151200

  According to the stator 100 of the rotating electrical machine of Patent Document 1, as shown in FIG. 15, the outer connection coil 141 constituting the connection coil 140 and the outer diameter side slot coil 126 constituting the slot coil 125 via the inner connection coil 142, Distributed winding is performed by alternately connecting the inner diameter side slot coil 127. Therefore, the winding pattern can be formed only when the number of the slot coils 125 in the slot 123 is an even number, and the number of the slot coils 125 is an odd number (the example of FIG. 3), there is a problem that the winding pattern cannot be formed and the degree of freedom of design is greatly restricted. In FIG. 15, connecting coils 140 (141, 142) indicated by solid lines are connecting coils on one side (insulating plate 131R side) of the stator core 121, and connecting coils 140 (141, 142) indicated by alternate long and short dashed lines are the stator core 121. It is a connection coil of the other side (insulation plate 131L side).

  Further, as shown in FIGS. 16 and 17, in the insulating plates 131 </ b> L and 131 </ b> R that accommodate the connection coil 140, the number of outer side grooves 137 that accommodate the outer connection coil 141 and the number of inner side grooves 138 that accommodate the inner connection coil 142. (For example, 72 in the case of a 6-turn, 72-slot stator), the groove width W1 of the outer surface groove 137 and the inner surface groove 138 becomes narrower, and further, between the adjacent outer surface grooves 137 and the inner surface groove 138. The rib thickness W2 is reduced. In FIG. 16, a connection coil 140 indicated by a solid line is an outer connection coil 141 disposed on one side (for example, the insulating plate 131 </ b> R) of the stator core 121, and the connection coil 140 indicated by a two-dot chain line is one of the same stator core 121. It is the inner side connection coil 142 arrange | positioned at the side (for example, insulating plate 131R).

  For this reason, it is difficult to produce the insulating plates 131L and 131R, and the die production cost becomes expensive due to the durability problem of the molding die D. Further, there has been a problem that finishing man-hours such as removal of burrs from the insulating plates 131L and 131R after molding are required.

  An object of the present invention is to provide a stator of a rotating electrical machine that can form a winding pattern regardless of the number of slot coils (even and odd) arranged in a slot.

In order to achieve the above object, the invention described in claim 1
A stator core having a plurality of slots (for example, a slot 23 in an embodiment described later) (for example, a stator core 21 in an embodiment described later);
A plurality of segmented coils (for example, a U-phase coil 50U, a V-phase coil 50V, and a W-phase coil 50W in an embodiment described later),
The segmented multi-phase coils are inserted into a plurality of slots of the stator core, respectively, and extend in a substantially straight line (for example, outer-diameter side slot coil 26 and intermediate slot coil in the embodiments described later). 27, an inner diameter side slot coil 28), and a plurality of connection coils (for example, connection coil 40 in an embodiment described later) connecting the slot coils having the same phase to each other to form a transition portion. A stator (for example, a stator 10 in an embodiment described later),
On both sides of the stator core, there are insulating plates (for example, insulating plates 31L and 31L in the embodiments described later) having through holes (for example, through holes 32 in the embodiments described later) as many as the number of slots of the stator core. 31R) is provided,
In the slot of the rotating electrical machine, the slot coils located at the same radial position in the slot are connected by the connection coils arranged on the insulating plates provided on both sides of the stator core.

In the invention according to claim 2, in the invention according to claim 1,
On both sides of the stator core, the same number of insulating plates as the slot coils inserted into the respective slots (for example, insulating plates 312R, 313L, 313R, insulating plates 311L, 311R, 312L in the embodiments described later) are provided. ,
The slot coils located at the same radial position in the slot are connected by the connection coil disposed on the same insulating plate provided on both sides of the stator core,
Connection pitch of the connection coil (for example, implementation described later) in the one insulating plate (for example, the insulation plates 311R, 312R, 313R in the embodiment described later) connected to the slot coil located at the same radial position Connection pitch P1) in the form and the connection pitch of the connection coil (for example, described later) in the other insulating plate (for example, the insulating plates 311L, 312L, 313L in the embodiment described later) connected to the slot coil. The connection pitch P2) in this embodiment is different.

The invention according to claim 3 is the invention according to claim 2,
Within each slot, from the inner diameter side to the outer diameter side, a first slot coil (for example, an inner diameter side slot coil 28 in an embodiment described later) and a second slot coil (for example, an intermediate slot coil 27 in an embodiment described later). ), And a third slot coil (for example, an outer diameter side slot coil 26 in an embodiment described later) are arranged in this order,
On both sides of the stator core, there are three sets of insulating plates (for example, first insulating plates 311L and 311R, second insulating plates 312L and 312R, and third insulating plate 313L in the embodiments described later) sandwiching the stator core. 313R),
The first slot coils are connected by the connection coil disposed on any one of the three insulating plates (for example, first insulating plates 311L and 311R in the embodiments described later). Is distributed by
The second slot coils are connected to each other by the connection coil disposed on the other one of the three sets of insulating plates (for example, the second insulating plates 312L and 312R in the embodiments described later). Is distributed by
The third slot coils are connected to each other by the connection coil arranged on the remaining one of the three insulating plates (for example, the third insulating plates 313L and 313R in the embodiments described later). It is distributed by that.

Moreover, in invention of Claim 4, in invention of any one of Claims 1-3,
The connection coil is insulated from an inner connection coil (for example, an inner connection coil 42 in an embodiment described later) disposed in an inner surface groove (for example, an inner surface groove 38 in an embodiment described later) of the insulating plate. The outer connection coil (for example, the outer connection coil 41 in the later-described embodiment) disposed in the outer surface groove (for example, the outer surface groove 37 in the later-described embodiment) of the plate,
The joint between the slot coil and the outer connection coil is exposed on the outer surface of the insulating plate, and the joint between the slot coil and the inner connection coil is exposed on the outer surface of the insulating plate.

The invention according to claim 5 is the invention according to any one of claims 1 to 4,
The connection coil is composed of an inner connection coil disposed in an inner surface groove of the insulating plate and an outer connection coil disposed in an outer surface groove of the insulating plate,
The height of the inner surface groove (for example, the height H1 of the inner surface groove in the embodiment described later) is higher than the height of the inner connection coil (for example, the height H2 of the inner connection coil in the embodiment described later). The height of the outer surface groove (for example, the height H3 of the outer surface groove in the embodiment described later) is the height of the outer connection coil (for example, the height of the outer connection coil in the embodiment described later). Higher than H4).

  According to the first aspect of the present invention, the winding pattern can be formed regardless of whether the number of slot coils disposed in the slot is an even number or an odd number. Can be set arbitrarily.

  According to the second aspect of the present invention, the number of connecting coils disposed on each of the insulating plates disposed on the left and right sides of the stator core is reduced, and the forming of the insulating plate is facilitated. Moreover, even when the number of slot coils is arbitrarily set, a regular electrical path can be configured.

  According to the third aspect of the present invention, even when the number of slot coils is set to three, the insulating plate has good moldability, can be easily assembled, and can form an electrical path with regularity.

  According to the invention described in claim 4, each connecting coil and the slot coil can be joined from the outer surface of the connecting coil, so that workability is good.

  According to the invention described in claim 5, since the height of the inner side surface groove is higher than the height of the inner side connection coil, insulation between the inner side connection coils adjacent to each other is ensured by the partition walls defining the inner side surface groove, Since the height of the outer side surface groove is higher than the height of the outer side connection coil, insulation between adjacent outer side connection coils is ensured by the partition walls that define the outer surface groove. Further, the insulating properties of the outer connecting coil and the inner connecting coil of the insulating plates stacked in the axial direction are also ensured by the partition walls that define the inner surface grooves and the partition walls that define the outer surface grooves.

It is an external appearance perspective view of the stator of the rotary electric machine of one Embodiment concerning this invention. It is a disassembled perspective view of the stator of the rotary electric machine shown in FIG. It is a perspective view of three slot coils inserted in each slot of a stator core. It is a principal part disassembled perspective view of the inner side connection coil arrange | positioned at the inner surface groove | channel of a 1st insulating plate, and the outer side connection coil arrange | positioned at an outer surface groove | channel. It is a perspective view which extracts and shows the joining state by which the slot coil (inner diameter side slot coil) of the same phase was joined by the outer side connection coil and the inner side connection coil. It is principal part sectional drawing which shows the joining state in which three slot coils were joined with the outer side connection coil and the inner side connection coil, respectively. FIG. 5 is a schematic view showing a connection structure of a U-phase outer diameter side slot coil. FIG. 10 is a schematic view showing a joint structure of an outer diameter side slot coil of a UVW phase in a third insulating plate on one side. It is a principal part perspective view which shows the state by which the 1st insulation plate assembly is laminated | stacked on the 2nd insulation plate assembly, and the inner side connection coil and outer side connection coil of a 1st insulation plate assembly are joined with an inner diameter side slot coil. . It is a perspective view of a U-phase coil. It is a schematic diagram which shows the state by which one sheet of insulation plate is shape | molded by a shaping die. FIG. 2 is a schematic diagram showing a connection mode of U-phase, V-phase, and W-phase coils in the stator of the rotating electrical machine of FIG. 1. It is an external appearance perspective view of the stator of the conventional rotary electric machine. It is a disassembled perspective view of the stator of the conventional rotary electric machine. It is the schematic diagram which extracts and shows only the connection structure of the (part) U phase coil from the connection structure of the UVW phase coil in the stator of the conventional rotary electric machine. It is a schematic diagram which shows the connection structure of the UVW phase in the one insulating plate in the stator of the conventional rotary electric machine. It is a schematic diagram which shows the state by which the conventional insulating plate is shape | molded with a shaping die.

Hereinafter, a stator of a rotating electrical machine according to an embodiment of the present invention will be described with reference to the drawings.
[Stator]
As shown in FIGS. 1 and 2, the stator 10 of the rotating electrical machine of the present embodiment includes a stator core assembly 20 and a pair of insulating plate assemblies 30L and 30R, and the insulating plate assemblies 30L and 30R are The stator core assembly 20 is disposed and assembled on both sides.

[1 Stator core assembly]
The stator core assembly 20 includes a stator core 21 and a plurality of slot coils 25.

[1-1 Stator core]
The stator core 21 is configured by, for example, laminating a plurality of pressed silicon steel plates, and includes a plurality of teeth 22 and a plurality of slots 23 formed between adjacent teeth 22 on the radially inner side. . The slot 23 is formed so as to penetrate in the axial direction of the stator core 21, is formed in a substantially oval shape that is long in the radial direction of the stator core 21 when viewed from the axial direction, and the opening 24 opens to the inner peripheral surface of the stator core 21. Yes. A plurality of fastening portions 15 that fasten the stator core 21 to a housing (not shown) are provided on the outer peripheral portion of the stator core 21.

[1-2 Slot coil]
3 and 6, the slot coil 25 inserted into each slot 23 includes an outer diameter side slot coil 26, an intermediate slot coil 27, and an inner diameter side slot coil 28 which are plate-like conductors having a rectangular cross section. The slot coils 26, 27, and 28 are insulated from each other by an injection molded resin or the like.

  The outer diameter side slot coil 26, the intermediate slot coil 27, and the inner diameter side slot coil 28 are set longer in this order. Specifically, the outer diameter side slot coil 26 is substantially equal to the sum of the axial width L1 (see FIG. 1) of the stator core 21 and the axial width (3 × L2) of three connecting coils 40 described later. The length (L1 + 3 × L2) is set, and the intermediate slot coil 27 has a length approximately equal to the sum of the axial width L1 of the stator core 21 and the axial width (7 × L2) of the seven connecting coils 40 ( L1 + 7 × L2), and the inner diameter side slot coil 28 has a length (L1 + 11 ×× 1) that is substantially equal to the sum of the axial width L1 of the stator core 21 and the axial width (11 × L2) of 11 connecting coils 40. L2).

  As shown in FIG. 6, the outer diameter side slot coil 26, the intermediate slot coil 27, and the inner diameter side slot coil 28 are arranged in this order from the outer diameter side of the slot 23 toward the radial inner side. That is, the outer diameter side slot coil 26 is inserted on the outer diameter side of the slot 23, the inner diameter side slot coil 28 is inserted on the inner diameter side of the slot 23, and the intermediate slot coil 27 is connected to the outer diameter side slot coil 26 and the inner diameter side. It is inserted between the side slot coils 28 (intermediate).

  Further, the outer diameter side slot coil 26 protrudes from the one end surface 21a of the stator core 21 by the axial width (2 × L2) of the two connecting coils 40, and therefore from the other end surface 21b of the stator core 21. Is inserted into the slot 23 so as to protrude by the axial width (L2) of one connection coil 40. Hereinafter, the outer diameter side slot coil 26 in the inserted state is also referred to as a convex outer diameter side slot coil 26.

  Further, the slot 23 adjacent to the slot 23 in the circumferential direction protrudes from the one end face 21a of the stator core 21 by an axial width (L2) of one connection coil 40, and accordingly, the other end of the stator core 21 is projected. Is inserted into the slot 23 so as to protrude by an axial width (2 × L2) of two connecting coils 40 from the end face 21b. Hereinafter, the outer diameter side slot coil 26 in the inserted state is also referred to as a concave outer diameter side slot coil 26.

  The convex and concave outer-diameter side slot coils 26 are alternately arranged in the circumferential direction of the stator core 21. That is, the outer diameter side slot coil 26 inserted into the slot 23 is alternately arranged in a convex state and a concave state in the circumferential direction of the stator core 21.

  An intermediate slot coil 27 is inserted into the inner diameter side of the outer diameter side slot coil 26 in the slot 23 in which the convex outer diameter side slot coil 26 is inserted. The intermediate slot coil 27 protrudes from the one end face 21a of the stator core 21 by the axial width (3 × L2) of the three connecting coils 40. Therefore, the connecting coil extends from the other end face 21b of the stator core 21. It is inserted into the slot 23 so as to protrude by 40 axial widths (4 × L2). Hereinafter, the inserted intermediate slot coil 27 is also referred to as a concave intermediate slot coil 27.

  Further, the intermediate slot coil 27 inserted into the slot 23 adjacent to the slot 23 in the circumferential direction and having the concave outer diameter side slot coil 26 inserted therein is connected to the 4 of the connection coils 40 from one end face 21a of the stator core 21. Slots so as to protrude by the axial width (4 × L2) of the sheets, and accordingly, protrude from the other end surface 21b of the stator core 21 by the axial width (3 × L2) of the three connecting coils 40. 23 is inserted. Hereinafter, the inserted intermediate slot coil 27 is also referred to as a convex intermediate slot coil 27.

  The intermediate slot coil 27 inserted into the slot 23 on the inner diameter side of the outer diameter side slot coil 26 is alternately arranged in a concave state and a convex state in the circumferential direction of the stator core 21.

  An inner diameter side slot coil 28 is inserted on the inner diameter side of the intermediate slot coil 27 in the slot 23 in which the outer diameter side slot coil 26 in the convex state and the intermediate slot coil 27 in the concave state are inserted. The inner diameter side slot coil 28 protrudes from the one end face 21a of the stator core 21 by the axial width (6 × L2) of the six connecting coils 40, and therefore is connected from the other end face 21b of the stator core 21. The coil 40 is inserted into the slot 23 so as to protrude by the axial width (5 × L2) of five coils 40. Hereinafter, the inserted inner diameter side slot coil 28 is also referred to as a convex inner diameter side slot coil 28.

  Accordingly, in this slot 23, a radially outer slot coil 26, a concave intermediate slot coil 27, and a radially inner slot coil 28 that are convex from the radially outer side are arranged in the radial direction.

  Further, the slot 23 adjacent to the slot 23 in the circumferential direction and inserted with the concave outer-diameter side slot coil 26 and the convex intermediate slot coil 27 is inserted into the inner slot on the inner diameter side of the intermediate slot coil 27. The coil 28 is inserted. The inner diameter side slot coil 28 protrudes from the one end face 21a of the stator core 21 by the axial width (5 × L2) of the five connection coils 40, and therefore is connected from the other end face 21b of the stator core 21. The coils 40 are inserted into the slots 23 so as to protrude by an axial width (6 × L2) of six sheets. Hereinafter, the slot coil 25 in the inserted state is also referred to as a concave inner diameter side slot coil 28.

  In this manner, each slot coil 25 (outer diameter side slot coil 26, intermediate slot coil 27, and inner diameter side slot coil 28) has a plurality of slots 23 of the stator core 21 in a convex state and a concave direction in the circumferential direction and the radial direction. The stator core assembly 20 is configured by being alternately inserted in the state and arranged in the circumferential direction and the radial direction of the stator core 21.

  Further, between the outer diameter side slot coil 26, the intermediate slot coil 27, the inner diameter side slot coil 28 and the slot 23 of the stator core 21, an insulating material covering each of the slot coils 26, 27, 28 is connected to the stator core 21. Insulation is ensured.

[2 Insulating plate assembly]
The insulating plate assemblies 30L and 30R respectively disposed on both sides of the stator core assembly 20 include insulating plates 31L and 31R and a plurality of connection coils 40, respectively. Specifically, the insulating plate assemblies 30L and 30R are arranged in order from the outer side in the axial direction, the first insulating plate assemblies 301L and 301R, the second insulating plate assemblies 302L and 302R, and the third insulating plate assemblies 303L and 303R. And comprising. Each of the insulating plate assemblies 301L, 301R, 302L, 302R, 303L, 303R includes a plurality of first annular insulating plates 311L, 311R, second insulating plates 312L, 312R, and third insulating plates 313L, 313R, respectively. The connecting coil 40 has substantially the same structure.

  The first insulating plates 311L and 311R, the second insulating plates 312L and 312R, and the third insulating plates 313L and 313R are substantially annular members, and have outer diameters that are gradually increased in this order (see FIG. 6). .

[2-1 Insulating plate]
As shown in FIG. 6, the first insulating plate 311R, the second insulating plate 312R, and the third insulating plate 313R are substantially annular members formed of an insulating resin (nonmagnetic material) or the like. The inner diameters of the first insulating plate 311R, the second insulating plate 312R, and the third insulating plate 313R are slightly smaller than the diameter of a virtual circle that connects the inner peripheral side of the inner diameter side slot coil 28 inserted into the slot 23. . In addition, since each insulating plate 311L, 311R, 312L, 312R, 313L, 313R has substantially the same configuration, the first insulating plate 311R will be mainly described below as an example.

  As shown in FIG. 4, a plurality of through holes 32 that connect the outer surface 35 and the inner surface 36 are formed on the inner diameter side of the first insulating plate 311R. The plurality of through holes 32 have substantially the same shape as the slot 23 and are formed at equal intervals on the same circumference corresponding to the slot 23. That is, the same number of through holes 32 as the number of slots 23 are formed in the first insulating plate 311R.

  As shown in FIG. 6, the through hole 32 of the first insulating plate 311R is a hole through which a convex inner diameter side slot coil 28 joined to an outer connecting coil 41 described later penetrates in the axial direction, and an inner surface described later. This is a joining work hole for joining the connection coil 42 and the concave inner diameter side slot coil 28. The through hole 32 of the second insulating plate 312R has a convex intermediate slot coil 27 joined to an outer connecting coil 41 described later and an inner diameter side slot coil 28 positioned on the inner diameter side of the intermediate slot coil 27 in the axial direction. In addition to being a through-hole, it is a joining work hole for joining an inner connection coil 42 and a concave intermediate slot coil 27 described later. The through hole 32 of the third insulating plate 313R has a convex outer diameter side slot coil 26 joined to an outer connection coil 41 described later, an inner diameter side slot coil 28 positioned on the inner diameter side of the outer diameter side slot coil 26, and The intermediate slot coil 27 is a hole penetrating in the axial direction, and is a joining work hole for joining an inner connection coil 42 described later and a concave outer diameter side slot coil 26.

  In addition, a plurality of connection coil joining holes 34 communicating the outer side surface 35 and the inner side surface 36 are formed at equal intervals on the outer diameter side of the first insulating plate 311R. The connection coil joining hole 34 is a through hole for joining the outer diameter side end 43 of the outer connection coil 41 and the outer diameter side end 44 of the inner connection coil 42 by laser welding or the like.

  As shown in FIGS. 4 and 6, the outer side surface 35 and the inner side surface 36 have a plurality of outer side surface grooves 37 and inner side surface grooves 38 having substantially U-shaped cross-sections that open to the outer side surface 35 and the inner side surface 36, respectively. It is formed close to the circumferential direction.

  As shown in FIG. 4, each inner surface groove 38 connects the connection coil joint hole 34 and the through-hole 32 spaced a predetermined angle counterclockwise from the connection coil joint hole 34 in the front view. It is formed in a substantially S shape. Further, each outer surface groove 37 is formed in a substantially S-shape so as to connect the connection coil joint hole 34 and the through-hole 32 spaced apart from the connection coil joint hole 34 in the clockwise direction by a predetermined angle ( Not shown). That is, in the first insulating plate 311R, the through-hole 32 through which the convex inner-diameter slot coil 28 passes, and the through-hole 32 in which the concave inner-diameter-side slot coil 28 spaced circumferentially from the through-hole 32 are located. Are connected via a connecting coil joint hole 34 in which the outer surface groove 37 and the inner surface groove 38 are continuously connected in common.

  The depth H1 of the inner surface groove 38 is deeper than the thickness H2 of the inner connection coil 42 (same as the axial width L2 shown in FIG. 5), and the depth H3 of the outer surface groove 37 is the thickness of the outer connection coil 41. It is deeper than H4 (same as the axial width L2 shown in FIG. 5).

  The outer surface grooves 37, 37 adjacent to each other and the inner surface grooves 38, 38 are insulated from each other by a partition wall 31b, and the outer surface groove 37 and the inner surface groove 38 facing each other in the axial direction are intermediate walls 31c. Insulated by.

[2-2 Connection coil]
As shown in FIGS. 4 to 6, the connection coil 40 is formed in a plate shape by a conductive material such as copper, and the outer connection coil 41 inserted into the outer surface groove 37 and the inner surface groove 38 respectively. It can be divided into the inner connection coil 42 to be inserted. The outer connection coil 41 and the inner connection coil 42 have the same plate thickness. The outer connection coil 41 referred to here is a connection coil 40 that is on the outer side in the axial direction of the stator 10 when the stator core assembly 20 and the insulating plate assemblies 30L and 30R are assembled. Reference numeral 42 denotes a connection coil 40 that is the axially inner side of the stator 10.

  Referring also to FIG. 5, the outer connection coil 41 is a plate-like conductor having a rectangular cross section having a uniform thickness (L2), and is extended from the rectangular portion 41a and the rectangular portion 41a. And is formed in a substantially S shape having the same shape as the outer surface groove 37. The outer connection coils 41 arranged on the first insulating plates 311L and 311R, the second insulating plates 312L and 312R, and the third insulating plates 313L and 313R have basically the same configuration, but are connected to the slots. Depending on the position of the coil 25, the size (radial width) of the rectangular portion 41a is different. Here, the outer connecting coil 41 connected to the first insulating plate 311R will be described as an example. When the outer connecting coil 41 is inserted into the outer surface groove 37, the corner portion of the rectangular portion 41a corresponding to the through hole 32 is The thickness of the inner portion is eliminated by approximately half, and a joint portion 41c with the inner diameter side slot coil 28 is formed. Further, the extending portion 41b has a half of the thickness of the inner portion at the tip thereof deleted to form a joint portion 41d with the inner connecting coil 42.

  The inner connection coil 42 is a plate-shaped conductor having a uniform cross section (L2) having a uniform thickness (L2). The inner connection coil 42 includes a rectangular portion 42a and an extending portion 42b integrally extending from the rectangular portion 42a. It is formed in a substantially S shape that is the same shape as the groove 38. The inner connection coils 42 arranged on the first insulating plates 311L and 311R, the second insulating plates 312L and 312R, and the third insulating plates 313L and 313R basically have the same configuration, but are connected to the slots. Depending on the position of the coil 25, the size (radial width) of the rectangular portion 42a is different. Here again, the inner connection coil 42 connected to the first insulating plate 311R will be described as an example. When the inner connection coil 42 is inserted into the inner surface groove 38, the corner of the rectangular portion 42a corresponding to the through hole 32 is The thickness of the inner portion is eliminated by approximately half, and a joint portion 42c with the inner diameter side slot coil 28 is formed. In addition, the extended portion 42 b is bent at a tip end in a crank shape toward the outer surface side, and a joint portion 42 d with the outer connection coil 41 is formed.

  The outer connection coil 41 and the inner connection coil 42 can be formed in a desired axial width and a desired planar shape by performing a process such as press punching from a metal plate (for example, a copper plate) having a predetermined plate thickness. it can.

  As shown in FIG. 4, the inner connection coil 42 is inserted into the inner surface groove 38 of the first insulating plate 311R. The joint portion 42 c of the inner connection coil 42 is disposed corresponding to the through hole 32. Thus, when the third insulating plate assembly 303R is assembled on the second insulating plate assembly 302R, the concave state is inserted into the slot 23 of the stator core 21 and located in the through hole 32 (the left side through hole 32 in the drawing). It contacts the inner diameter side slot coil 28.

  When the outer connection coil 41 is inserted into the outer surface groove 37 of the first insulating plate 311R, the joint portion 41c of the outer connection coil 41 is disposed corresponding to the through hole 32. Thus, when the third insulating plate assembly 303R is assembled on the second insulating plate assembly 302R, the convex inner diameter side slot coil 28 that is inserted into the slot 23 of the stator core 21 and protrudes through the through hole 32, and Abut.

  As shown in FIG. 4, the joint 41 d of the outer connection coil 41 and the joint 42 d of the inner connection coil 42 are both arranged corresponding to the connection coil joint holes 34 and correspond to the outer side as shown in FIG. 5. The lower surface of the joint portion 41d of the connection coil 41 and the upper surface of the joint portion 42d of the inner connection coil 42 abut over the entire surface.

[3 Joining]
The joint portion 41c of the outer connection coil 41 and the convex inner diameter side slot coil 28, the joint portion 42c of the inner connection coil 42 and the concave inner diameter side slot coil 28, and the joint portion 41d of the outer connection coil 41, which are in contact with each other. In the joining portion 42d of the inner connection coil 42, planar plate surfaces intersecting each other in the thickness direction are joined by welding, preferably by laser welding. At this time, since any of the joint portions is exposed on the outer surface side of the first insulating plate assembly 301R, it can be easily joined. The same applies to the first insulating plate assembly 301L, the second insulating plate assemblies 302L and 302R, and the third insulating plate assemblies 303L and 303R.

  A third insulating plate assembly 303R in which a plurality of outer connecting coils 41 and inner connecting coils 42 are incorporated in the outer surface groove 37 and the inner surface groove 38 of the third insulating plate 313R, respectively, is provided in each slot 23, respectively. When the coil 26, the intermediate slot coil 27, and the inner diameter side slot coil 28 are arranged on the side surface of the stator core assembly 20, as shown in FIG. The end face of the radial slot coil 26 comes into contact with the joint portion 42c of each inner connection coil 42 and the end face of the outer diameter side slot coil 26 in each concave state. At the same time, the joint 41d of the outer connection coil 41 and the joint 42d of the inner connection coil 42 come into contact with each other.

  At this time, since the outer diameter side slot coil 26 is alternately arranged in the circumferential direction in the convex state and the concave state, the outer diameter side slot coil 26 contacting the joint portion 41c of the outer connection coil 41 is in the convex state. Then, the outer diameter side slot coil 26 that contacts the joint portion 42c of the inner connection coil 42 is in a concave state.

  When the third insulating plate assembly 303R is disposed on the side surface of the stator core assembly 20, the outer surface of the joint portion 42c of the inner connecting coil 42 is cut off from the through hole 32 of the third insulating plate 313R and the outer connecting coil 41. It is exposed to the outer surface through the notch 41e (see also FIG. 9).

  Therefore, it is possible to irradiate the joint from the outer surface of the third insulating plate assembly 303R. Accordingly, the joint portion 41c of the outer connection coil 41 and the convex outer diameter side slot coil 26, the joint portion 42c of the inner connection coil 42, the concave outer diameter side slot coil 26, and the joint portion 41d of the outer connection coil 41 are provided. The joint portion 42d of the inner connection coil 42 can be laser-welded from the outer surface.

  When the third insulating plate assembly 303R is assembled to the stator core assembly 20, the intermediate slot coil 27 and the inner diameter side slot coil 28 protrude in the axial direction through the through hole 32 of the third insulating plate 313R.

  FIG. 7 is a diagram schematically showing the connection state by extracting a part of the U-phase coil of the outer connection coil 41, the inner connection coil 42, and the outer diameter side slot coil 26 in the stator 10 having six turns and 72 slots. The outer connecting coil 41 of the third insulating plate assembly 303R (41A in FIG. 7 for ease of understanding) and the inner connecting coil 42 (42A in FIG. 7 of FIG. 7 for ease of understanding). And the inner connection coil 42 (for ease of understanding, here, 41B in FIG. 7 for ease of understanding) and the inner connection coil 42 (for ease of understanding). Therefore, here, the connection of 42B in FIG. 7 is indicated by a one-dot chain line. In FIG. 7, the same hatching is applied to the outer diameter side slot coil 26, the intermediate slot coil 27, and the inner diameter side slot coil 28 of the same phase among the U phase, the V phase, and the W phase (FIG. 15). , 16 also).

  In the third insulating plate 313R of the third insulating plate assembly 303R, as shown by the solid line in the drawing, the outer connection coil 41A joined to the convex outer diameter side slot coil 26, the outer diameter side slot coil 26, An inner connection coil 42A, which is disposed on the same circumference and joined to the concave outer diameter side slot coil 26 spaced apart from the outer diameter side slot coil 26 in the circumferential direction by the outer connection coil 41A, It joins by the diameter side edge part 43 and the outer diameter side edge part 44 of 42 A of inner side connection coils. That is, in the third insulating plate assembly 303R, the outer diameter side slot coils 26 arranged on the same circumference are connected at the connection pitch P1. In other words, the connection pitch of the connection coils 40 (41A, 42A) in the third insulating plate 313R is P1.

  Further, in the third insulating plate 313L of the third insulating plate assembly 303L, as shown by a one-dot chain line in the drawing, the outer side of the outer side slot coil 26 in the concave state (the convex state on the third insulating plate assembly 303L side) is provided. The connecting coil 41B is joined, is arranged on the same circumference as the outer diameter side slot coil 26, and is in a convex state spaced five more from the outer diameter side slot coil 26 (recessed on the third insulating plate assembly 303L side). The inner connection coil 42B joined to the outer diameter side slot coil 26 in the state) is joined at the outer diameter side end 43 of the outer connection coil 41B and the outer diameter side end 44 of the inner connection coil 42B. That is, in the third insulating plate assembly 303L, the outer diameter side slot coils 26 arranged on the same circumference are connected at the connection pitch P2. In other words, the connection pitch of the connection coils 40 (41B, 42B) in the third insulating plate 313L is P2.

  In this way, the connection pitch P1 of the connection coils 40 (41A, 42A) in the third insulation plate 313R of the third insulation plate assembly 303R and the connection coil 40 (41B in the third insulation plate 313L of the third insulation plate assembly 303L). 42B) is set to a different pitch from the connection pitch P2.

  FIG. 8 is a diagram schematically showing the three-phase connection state of the UVW phase in the third insulating plate assembly 303R. The number of outer connection coils 41 arranged on the third insulating plate 313R is as follows. While the number of slots 23 formed in the stator core 21 is half, the number of inner connection coils 42 is also half the number of slots 23 formed in the stator core 21. As a result, as shown in FIG. 11, the aspect ratio of the partition wall 31b between the outer side groove 37 and the inner side groove 38 adjacent in the circumferential direction is reduced, the strength of the molding die D is improved, and the insulating plate 31L, 31R can be easily manufactured.

  After the third insulating plate assemblies 303R and 303L are assembled on both side surfaces of the stator core assembly 20, the outer connecting coils are formed in the outer surface grooves 37 of the second insulating plates 312R and 312L in the same manner as the third insulating plate assembly 303R. 41, and the second insulating plate assemblies 302R and 302L in which the inner connecting coil 42 is inserted into the inner side surface groove 38 are superimposed on the third insulating plate assemblies 303R and 303L. The joint part 41c and the end face of each convex intermediate slot coil 27, the joint part 42c of each inner connection coil 42 and the end face of each concave intermediate slot coil 27, and the outer diameter side end part 43 of each outer connection coil 41 The outer diameter side end 44 of each inner connection coil 42 is joined by laser welding or the like. Since the intermediate slot coil 27 protrudes in the axial direction from the through hole 32 of the third insulating plates 313R and 313L, the second insulating plate assemblies 302R and 302L can be easily joined to the intermediate slot coil 27.

  After the second insulating plate assemblies 302R and 302L are assembled in this manner, the outer connection coil 41 is inserted into the outer surface groove 37 of the first insulating plates 311R and 311L as shown in FIG. The first insulating plate assemblies 301R and 301L in which the inner connection coil 42 is inserted into the groove 38 are overlapped with the second insulating plate assemblies 302R and 302L, respectively, and the joint portions 41c of the outer connection coils 41 and the convex states. Of the inner-side slot coil 28, the joints 42 c of the inner connection coils 42, the end surfaces of the inner-diameter slot coils 28 in the concave state, and the outer-diameter side end 43 of the outer connection coils 41 and the inner connection coil 42. The stator 10 is assembled by joining the outer diameter side end portion 44 by laser welding or the like. Also at this time, since the inner diameter side slot coil 28 protrudes in the axial direction from the inner diameter side of the second insulating plates 312R, 312L, the first insulating plate assemblies 301R, 301L can be easily joined to the inner diameter side slot coil 28. .

  By joining in this way, the outer diameter side slot coil 26, the intermediate slot coil 27, and the inner diameter side slot coil 28 inserted into the slot 23 of the stator core 21 are electrically connected via the outer connection coil 41 and the inner connection coil 42. The third insulating plate assemblies 303L and 303R, the second insulating plate assemblies 302L and 302R, and the first insulating plate assemblies 301L and 301R are axially inwardly connected to the stator core assembly 20 in a state of being connected to each other. Are assembled in this order. The outer connection coil 41 and the inner connection coil 42 of the first, second, and third insulating plate assemblies 301L, 301R, 302L, 302R, 303L, and 303R have the same phase (for example, U Phase) slot coils 25 are connected to each other to form a coil transition portion.

Next, the connection of the coil 50 of the stator 10 of the rotating electrical machine configured as described above will be described more specifically with reference to FIG.
The U-phase inner diameter side slot coils 28 are connected in series via the U-phase outer connection coil 41 and the inner connection coil 42 of the first insulating plate assemblies 301L and 301R to form a first U-phase coil 51U. The intermediate slot coils 27 of the phases are connected in series via the U-phase outer connection coil 41 and the inner connection coil 42 of the second insulating plate assemblies 302L and 302R to form a second U-phase coil 52U. The outer diameter side slot coils 26 are connected in series via the U-phase outer connection coil 41 and the inner connection coil 42 of the third insulating plate assemblies 303L and 303R to form a third U-phase coil 53U. And U phase coil 50U is formed by connecting the 1st-3rd U phase coils 51U-53U in series. FIG. 10 is a perspective view of the U-phase connecting coil 50U.

  Similarly, the V-phase inner diameter side slot coils 28 are connected in series via the V-phase outer connection coil 41 and the inner connection coil 42 of the first insulating plate assemblies 301L and 301R to form the first V-phase coil 51V. The V-phase intermediate slot coils 27 are connected in series via the V-phase outer connecting coil 41 and the inner connecting coil 42 of the second insulating plate assemblies 302L and 302R to form a second V-phase coil 52V. The V-phase outer diameter side slot coils 26 are connected in series via the V-phase outer connection coil 41 and the inner connection coil 42 of the third insulating plate assemblies 303L and 303R to form a third V-phase coil 53V. And the 1st-3rd V phase coil 51V-53V is connected in series, and the V phase coil 50V is formed.

  Similarly, the W-phase inner side slot coils 28 are connected in series via the W-phase outer connection coil 41 and the inner connection coil 42 of the first insulating plate assemblies 301L and 301R to form the first W-phase coil 51W. The W-phase intermediate slot coils 27 are connected in series via the W-phase outer connecting coil 41 and the inner connecting coil 42 of the second insulating plate assemblies 302L and 302R to form a second W-phase coil 52W. The W-phase outer diameter side slot coils 26 are connected in series via the W-phase outer connecting coil 41 and the inner connecting coil 42 of the third insulating plate assemblies 303L and 303R to form a third W-phase coil 53W. And W phase coil 50W is formed by connecting the 1st-3rd W phase coils 51W-53W in series.

  One end of the U-phase coil 50U, the V-phase coil 50V, and the W-phase coil 50W connected in this way is connected to the U-phase connection terminal 61U, the V-phase connection terminal 61V, and the W-phase connection terminal 61W, respectively. A star connection is made at the midpoint 62.

  As described above, according to the stator 10 of the rotating electrical machine according to the present embodiment, the insulating plates 31L and 31R having the same number of through holes 32 as the number of the slots 23 of the stator core 21 are provided on both sides of the stator core 21. The slot coils 25 positioned at the same radial position in the slot 23 are connected by connection coils 40 disposed on insulating plates 31L and 31R provided on both sides of the stator core 21. Therefore, the winding pattern can be formed regardless of whether the number of the slot coils 25 arranged in the slot 23 is an even number or an odd number, and the number of the slot coils 25 can be arbitrarily set. The degree of freedom increases.

  Further, the same number of insulating plates 31L and 31R as the number of slot coils 25 inserted into each slot 23 of the stator core 21 are provided on both sides of the stator core 21, and the slot coils 25 located at the same radial position in the slot 23. They are connected to each other by connection coils 40 arranged on the same insulating plates 31L and 31R provided on both sides of the stator core 21. That is, there are three slot coils 25 inserted into each slot 23: an outer diameter side slot coil 26, an intermediate slot coil 27, and an inner diameter side slot coil 28. On the right side of the stator core 21, there is a first insulating plate 311R. , A second insulating plate 312R and a third insulating plate 313R are provided. On the left side of the stator core 21, three of the first insulating plate 311L, the second insulating plate 312L, and the third insulating plate 313L are provided. A single insulating plate is provided. Then, the outer diameter side slot coils 26 located at the same radial position in the slot 23 are connected by the connection coils 40 arranged on the third insulating plates 313L and 313R, and distributed winding is performed. Are connected by connecting coils 40 arranged on the second insulating plates 312L and 312R, and the inner side slot coils 28 are connected by the connecting coils 40 arranged on the first insulating plates 311L and 311R. It is distributed by that. Therefore, the number of connecting coils 40 arranged on each of the insulating plates 311L, 311R, 312L, 312R, 313L, and 313R arranged on the left and right sides of the stator core 21 is reduced, and the insulating plates 311L, 311R, 312L, 312R, Molding of 313L and 313R becomes easy.

  Further, since the connection pitch P1 of the connection coil 40 in each of the insulating plates 311R, 312R, 313R on one side and the connection pitch P2 of the connection coil 40 in each of the other insulating plates 311L, 312L, 313L are different, the slot coil 25 Even when the number is arbitrarily set, an electric path having regularity can be configured.

  The connection coil 40 includes an outer connection coil 41 disposed in the outer surface groove 37 of each insulating plate 311L, 311R, 312L, 312R, 313L, and 313R and an inner connection coil 42 disposed in the inner surface groove 38. The joint between the slot coil 25 and the outer connection coil 41 is exposed on the outer surface of each insulating plate 311L, 311R, 312L, 312R, 313L, 313R, and the joint between the slot coil 25 and the inner connection coil 42 is also Since the insulating plates 311L, 311R, 312L, 312R, 313L, and 313R are exposed on the outer surface, each connecting coil 40 and the slot coil 25 can be joined from the outer surface of the connecting coil 40, and the workability is good.

  Further, the height H1 of the inner surface groove 38 is higher than the thickness H2 of the inner connection coil 42, and the height H3 of the outer surface groove 37 is higher than the thickness H4 of the outer connection coil 41. Insulation between adjacent inner connection coils 42 is ensured by the partition walls 31b that partition the outer connection coils 41, and insulation between adjacent outer connection coils 41 is secured by the partition walls 31b that partition the outer surface grooves 37. Further, the outer connection coil 41 and the inner connection coil 42 of each of the insulating plates 311L, 311R, 312L, 312R, 313L, and 313R stacked in the axial direction also define the intermediate wall 31c and the outer surface groove 37 that define the inner surface groove 38. The insulating property is ensured by the intermediate wall 31c.

In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.
For example, the slot coil 25 is not limited to a plate-like conductor having a rectangular cross section, but by using the slot coil 25 as a plate-like conductor, the slot coil 25 having an arbitrary shape can be easily manufactured by pressing or the like. Further, the coupling of the slot coil 25 and the connection coil 40 is not limited to joining by laser welding, but includes fastening by caulking or the like.

DESCRIPTION OF SYMBOLS 10 Stator 20 of rotary electric machine Stator core assembly 21 Stator core 23 Slot 25 Slot coil 26 Outer side slot coil (slot coil, third slot coil)
27 Intermediate slot coil (slot coil, second slot coil)
28 Inside diameter side slot coil (slot coil, first slot coil)
30L, 30R Insulating plate assembly 31L, 31R Insulating plate 37 Outer side groove 38 Inner side groove 40 Connection coil 41, 41A, 41B Outer connection coil (connection coil)
42, 42A, 42B Inner connection coil (connection coil)
301R, 301L First insulating plate assemblies 302R, 302L Second insulating plate assemblies 303R, 303L Third insulating plate assemblies 311L, 311R First insulating plates (insulating plates)
312L, 312R Second insulation plate (insulation plate)
313L, 313R Third insulation plate (insulation plate)
H1 Inner side groove depth (Inner side groove height)
H2 Inner connection coil thickness (inner connection coil height)
H3 Depth of outer side groove (height of outer side groove)
H4 Thickness of outer connection coil (height of outer connection coil)
P1, P2 connection pitch

Claims (5)

A stator core having a plurality of slots;
A segmented multi-phase coil,
The segmented multi-phase coils are inserted into the plurality of slots of the stator core, respectively, and a plurality of slot coils extending in a substantially straight line are connected to the slot coils of the same phase to form a cross section. A stator of a rotating electrical machine having a connection coil,
On both sides of the stator core, insulating plates each having the same number of through holes as the number of slots of the stator core are provided,
The stator of a rotating electrical machine, wherein the slot coils positioned at the same radial position in the slot are connected by the connection coil disposed on the insulating plate provided on both sides of the stator core. A stator for a rotating electrical machine according to claim 1,
On both sides of the stator core, the same number of insulating plates as the slot coils inserted into the slots are provided,
The slot coils located at the same radial position in the slot are connected by the connection coil disposed on the same insulating plate provided on both sides of the stator core,
The connection pitch of the connection coil in the one insulating plate connected to the slot coil located at the same radial position, and the connection pitch of the connection coil in the other insulating plate connected to the slot coil Different stators for rotating electrical machines. A stator for a rotating electrical machine according to claim 2,
In each slot, the first slot coil, the second slot coil, and the third slot coil are arranged in this order from the inner diameter side to the outer diameter side,
On both sides of the stator core, three sets of insulating plates corresponding to the stator core are provided,
The first slot coils are distributedly wound by being connected by the connection coil arranged on any one of the three sets of insulating plates,
The second slot coils are distributedly wound by being connected by the connection coil disposed on another one of the three sets of insulating plates,
The stator of a rotating electrical machine, wherein the third slot coils are distributedly wound by being connected by the connection coils arranged on the remaining one set of insulating plates among the three sets of insulating plates. A stator for a rotating electrical machine according to any one of claims 1 to 3,
The connection coil is composed of an inner connection coil disposed in an inner surface groove of the insulating plate and an outer connection coil disposed in an outer surface groove of the insulating plate,
The joint of the slot coil and the outer connecting coil is exposed on the outer surface of the insulating plate, and the joint of the slot coil and the inner connecting coil is exposed on the outer surface of the insulating plate. Stator. A stator for a rotating electrical machine according to any one of claims 1 to 4,
The connection coil is composed of an inner connection coil disposed in an inner surface groove of the insulating plate and an outer connection coil disposed in an outer surface groove of the insulating plate,
A stator for a rotating electrical machine, wherein a height of the inner surface groove is higher than a height of the inner connection coil, and a height of the outer surface groove is higher than a height of the outer connection coil.