JP2009247038A - Rotating electrical machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotating electrical machine with which efficient connection can be made between the coil of a stator piece, and a power collecting/distributing cable can be performed. <P>SOLUTION: One end 25a of some coil 25 of a plurality of stator pieces 20 is pulled out in its radial direction, and is connected with one of the power collecting/distributing cables 21u, 21v, 21w, at a first joint C1 which lies axially upon some of the power collecting/distributing cables 21u, 21v, 21w. Moreover, the first joint C1, where one end 25a of the coil 25 of each stator piece 20 and each power collecting/distributing cable 21u, 21v, 21w are connected with each other, is positioned above a virtual circle C, which is centered at the center O of a stator 12 between the end of the inner perimeter and the end of the periphery of a cable storage 24d. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a rotating electrical machine such as a motor and a generator, and more particularly to a rotating electrical machine that constitutes a stator by arranging a plurality of stator pieces in an annular shape.

  Conventionally, a plurality of stator pieces are formed by winding a coil around a split core via an insulator, a plurality of stator pieces are arranged in an annular shape to form a stator, and a collection of phases arranged annularly along the stator There is known a rotating electrical machine in which one end of a coil of each stator piece is connected to a distribution cable (bus ring) and the other end (neutral point) of a coil of an adjacent stator piece is connected. (For example, refer to Patent Document 1).

  The rotating electrical machine described in Patent Document 1 constitutes a stator by arranging a plurality of stator pieces 101 shown in FIG. 9 in an annular shape. On the outside of the stator piece 101, annular first to third power collection and distribution cables 102u (102v, 102w) electrically connected to the three-phase U, V, W input terminals are held by the holding unit 103. Has been.

  A coil 105 is wound around the insulator 104 of the stator piece 101, and one end portion 105 a of the coil 105 is connected to the fixed portion 102 a of the power collection and distribution cable 102 u via the connection terminal 106.

Further, the other end portion 105b of the coil 105 is provided inside the stator piece 101, and the other end portion 105b ′ of the coil of the stator piece adjacent to the other end portion 105b is connected to the connection terminal. 107 is electrically connected.
JP 2004-56873 A (FIG. 3)

  By the way, in the rotating electrical machine described in Patent Document 1, the connection between each phase of the three-phase power collection and distribution cable 102u (102v, 102w) arranged outside the stator piece 101 and one end 105a of the coil 105 is performed. (Fusing) is performed at two locations 106a and 107b of the connection terminal 106, and further improvement in productivity has been desired.

  In addition, the other end portion 105b 'of the coil of the adjacent stator piece is extended to the connection terminal 107 of the stator piece 101, and this end portion 105b' is sandwiched between the connection terminals 107, and this workability is improved. Further improvement has been desired. Furthermore, in order to arrange the connection terminal 107, the insulator 104 is formed to protrude so as to overlap the rotor when viewed from the axial direction. When the oil is cooled, the rotor side portion of the insulator 104 and the rotor There was a problem that an oil pool was formed between the two, and it became resistance when oil flowed.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a rotating electrical machine that can efficiently connect a coil of a stator piece and a power collection and distribution cable.

  In order to achieve the above-described object, the invention according to claim 1 is directed to a split core having a tooth (for example, a tooth 23b in an embodiment described later) (for example, a split core 23 in an embodiment to be described later), and electrically connecting the tooth. A plurality of stator pieces each having an insulator to be insulated (for example, an insulator 24 in an embodiment to be described later) and a coil (for example, a coil 25 in an embodiment to be described later) wound around the teeth via the insulator. (For example, a stator piece 20 in an embodiment described later) and a plurality of substantially ring-shaped power collection / distribution cables (for example, power collection / distribution cables 21u, 21v, 21w in an embodiment described later) provided for each phase. And connecting the plurality of stator pieces in an annular shape and the plurality of stays. One end of one of the coils of one of the pieces (for example, one end 25a in the embodiment described later) is connected to one of the plurality of power collection and distribution cables in a first connection portion (for example, in an embodiment described later). The rotating electrical machine includes a stator (for example, a stator 20 in an embodiment to be described later) configured by being connected by the first connection portion C1), and the power collection and distribution cables of the respective phases are arranged in the radial direction. And constitutes a power collection / distribution cable group (for example, a power collection / distribution cable group 21 in an embodiment to be described later), and the insulator is arranged around the teeth and wound around the coil (for example, A winding portion 24c in an embodiment described later, and an arc-shaped connection region (for example, in an embodiment described later) in which the first connection portion is disposed radially outside the winding portion. Cable housing portion 24d) and a wall portion (for example, a wall portion 24e in the embodiment described later) that separates the winding portion and the connection region, and the coil of any of the plurality of stator pieces One end of each of the stator pieces is drawn out radially outward, and is connected to one of the power collection and distribution cables at a first connection portion that overlaps one of the power collection and distribution cables in the axial direction or the radial direction. Each of the first connecting portions to which one end of the coil and each of the power collection and distribution cables are connected is a virtual circle centered on the center point of the stator between the inner peripheral end and the outer peripheral end in the connection region. It is located on (for example, the virtual circle C in embodiment mentioned later).

  According to a second aspect of the present invention, in the rotating electrical machine according to the first aspect, a front end portion of the teeth on the rotor facing surface side (for example, a front end portion 23c in an embodiment described later) and a rotor facing surface side flange of the insulator. (For example, the flange portion 24b in the embodiment described later) is formed substantially flush with the axial direction.

  The invention according to claim 3 is the rotating electrical machine according to claim 1 or 2, wherein the rotating electrical machine according to claim 1 is disposed in the connection region on the radially inner side or the outer side of the power collection and distribution cable group, and the other end of the coil of each stator piece ( For example, it further includes a substantially ring-shaped neutral point cable (for example, the neutral point cable 26 in the later-described embodiment) for connecting the other end portion 25b in the later-described embodiment, and the plurality of stator piece coils. The other end is a second connection portion (for example, a second connection portion C2 in an embodiment described later) that is drawn out radially outward and overlaps the neutral point cable in the axial direction or the radial direction. Each second connection portion connected to the neutral point cable and connected to the other end portion of the coil of each stator piece and the neutral point cable is between the inner peripheral end and the outer peripheral end in the connection region. Characterized in that positioned on the virtual circle.

  According to a fourth aspect of the present invention, in the rotating electrical machine according to the third aspect, in the first connection portion, one end portion of the coil of each stator piece and the respective power collection and distribution cables are caulked, In the second connection portion, the other end portion of the coil of each stator piece and the caulking direction for caulking the neutral cable are the same.

  According to a fifth aspect of the present invention, in the rotating electrical machine according to the first or second aspect, each of the power collection and distribution cables includes a plurality of projecting portions (for example, It is characterized by including a protrusion 27) in an embodiment described later.

  According to a sixth aspect of the present invention, in the rotating electrical machine according to the third or fourth aspect, each of the power collection and distribution cables includes a plurality of projecting portions that project to one side in the axial direction at each of the first connection portions, The neutral cable includes a plurality of other protrusions (for example, other protrusions in the embodiments described later) that protrude toward the one axial side at each of the second connection portions. To do.

  According to a seventh aspect of the present invention, in the rotating electrical machine according to the fifth or sixth aspect, in the power collection and distribution cable group, the protrusions of the power collection and distribution cables arranged on the radially inner and outer circumferential sides are It is characterized by being inclined toward the virtual circle.

  According to an eighth aspect of the present invention, in the rotating electrical machine according to the sixth or seventh aspect, the projecting portion is a through-portion (for example, described later) by projecting the power collection and distribution cable and the neutral point cable into a U shape. 33, 34) in the embodiment, and the lead-out portions (for example, the lead-out portions 35u, 35v, 35w in the embodiments described later) are drawn out to the outside through the penetration portion.

  The invention according to claim 9 is the rotating electrical machine according to any one of 3, 4, 6-8, wherein one end of the coil of each stator piece, each of the power distribution cables, and each coil of the stator piece A plurality of connection terminals (for example, terminals 31 and 32 in the embodiments described later) disposed in the first connection part and the second connection part in order to connect the other end of the cable and the neutral point cable, respectively. And the pair of connection terminals disposed in the first connection portion and the second connection portion, respectively, between the adjacent first connection portion and the second connection portion. It further includes a plurality of fixing portions (for example, fixing portions 29 in the embodiments described later) for fixing the pair of connection terminals respectively so as to extend toward both sides in the circumferential direction.

  The invention according to claim 10 is the rotating electrical machine according to claim 9, wherein the fixing portion fixes at least one of the power collection / distribution cable and the neutral point cable.

  According to an eleventh aspect of the present invention, in the rotating electrical machine according to the first or third aspect, the virtual circle has a radius in a substantially intermediate position in the radial direction between the inner peripheral end and the outer peripheral end in the connection region from the center point of the stator. It is characterized by.

  According to the rotating electric machine according to the first aspect, the number of the first connecting portions to be fused is reduced, and each first connecting portion can be fusing at substantially the same radial position, so that the fusing can be efficiently performed. Jing can be performed.

  According to the rotating electrical machine of the second aspect, it is difficult to form an oil pool in the air gap between the rotor and the stator, and the resistance when oil flows can be reduced.

  According to the rotating electrical machine of the third aspect, it is not necessary to project the insulator radially inward of the stator, and it becomes difficult to form an oil reservoir in the air gap between the rotor and the stator, thereby reducing the resistance. it can. Moreover, it is not necessary to extend the other end part of a coil to an adjacent stator piece, and it can shorten. Further, each first connection portion and each second connection portion can be fusing at substantially the same radial position, so that fusing can be performed efficiently.

  According to the rotating electric machine according to the fourth to seventh aspects, connection work at each connection portion is facilitated, productivity can be improved, and automation is facilitated.

  According to the rotating electrical machine of the eighth aspect, even if the power collection / distribution cable and the neutral point cable are juxtaposed in the radial direction, the lead portions of the respective phases can be pulled out without interfering with each other.

  According to the rotating electrical machine of the ninth aspect, the fixing portion that fixes the connection terminal of the first connection portion and the fixing portion that fixes the connection terminal of the second connection portion can be shared, and the number of parts is reduced. Can be made.

  According to the rotating electric machine of the tenth aspect, the fixing portion for fixing the connection terminal can be used as a member for fixing the power collection / distribution cable or the neutral point cable to the stator piece, and the number of parts can be reduced.

  According to the rotating electrical machine of the eleventh aspect, the connection portion can be set at the intermediate position of the connection region, a space for fusing is ensured, and fusing can be performed easily.

  Hereinafter, a rotating electrical machine according to an embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the rotating electrical machine 10 according to the present embodiment includes a stator 12 configured by annularly arranging a plurality (here, 18 pieces) of stator pieces 20 on the inner peripheral surface of a housing 11. A rotor 13 that rotates relative to the stator 12 is disposed inside the stator 12 so as to face the stator 12.

  As shown in FIGS. 1 and 2, the rotating electrical machine 10 is a three-phase AC type, and one end 25a of the coil 25 of each stator piece 20 corresponds to the U phase, the V phase, and the W phase, respectively. Are electrically connected to the bus bars 50u, 50v, 50w of each phase disposed in the housing 11 via a plurality of ring-shaped power collecting and distribution cables 21u, 21v, 21w (bus rings) provided for each phase. . Further, the other end 25b of the coil 25 of each stator piece 20 is connected to a ring-shaped neutral point cable (middle point ring) 26, and by connecting a part thereof to a ground terminal (not shown), The midpoint connection of each coil 25 is made. Thereby, U-phase, V-phase, and W-phase excitation currents are supplied to the coils 25.

  As shown in FIGS. 2 and 3, the stator piece 20 is configured by laminating silicon steel plates punched in a substantially T shape, and electrically insulates the teeth 23b from the split cores 23 having yokes 23a and teeth 23b. A resin-made insulator 24 and a coil 25 wound around the teeth 23b via the insulator 24 are provided.

  The insulator 24 is divided into two in the axial direction of the stator 12, has flange portions 24 a and 24 b at both ends in the radial direction, is disposed around the teeth 23 b, and is a winding portion 24 c around which the coil 25 is wound. A substantially arcuate cable housing portion 24d for housing a plurality of power collection and distribution cables 21u, 21v, 21w and a neutral point cable 26 on the radially outer side of the stator 12 from the winding portion 24c, and an inner periphery of the cable housing portion 24d. A wall portion 24e extending in the axial direction from the end and separating the winding portion 24c and the cable storage portion 24d, and a top plate portion 24f extending in the axial direction from the outer peripheral end of the cable storage portion 24d are provided. The flange portion 24b of the winding portion 24c forms a rotor facing surface side flange portion of the insulator 24 facing the rotor 13, and is substantially flush with the tip portion 23c on the rotor facing surface side of the tooth 23b in the axial direction. Formed. The cable storage portion 24d constitutes a connection region in which first and second connection portions C1 and C2 described later are disposed.

  In addition, the stator piece 20 is connected to the fixing portion 29 so as to extend toward both sides of the stator 12 in the circumferential direction of the stator 12 and the resin fixing portion 29 fixed to the cable housing portion 22 after the stator piece 20 is connected. And a pair of fixed connection terminals 31 and 32. The terminals 31 and 32 have support portions 31 a and 32 a held by the fixing portion 29 and caulking portions 31 b and 32 b provided at the tips of the support portions 31 a and 32 a, respectively. Insert molded.

  The power collection / distribution cables 21u, 21v, 21w of each phase are arranged side by side in the radial direction of the stator 12 to form a power collection / distribution cable group 21, and are connected and integrated by a mold resin 32. Each of the power collection and distribution cables 21u, 21v, and 21w includes a plurality of projecting portions 27 that project to one side in the axial direction (opening side of the cable housing portion 22) at predetermined intervals in the circumferential direction. Has an intermediate portion 27a and a pair of leg portions 27b, and is bent into a substantially U shape.

  Further, the neutral point cable 26 is housed in the cable housing portion 24 d of the connected stator piece 20 on the radially inner side of the power collection and distribution cable group 21. Therefore, the power collection / distribution cable group 21 and the neutral point cable 26 are integrally held by the cable storage portion 24d by fixing the fixing portion 29 to the cable storage portion 24d. The neutral point cable 26 also includes a plurality of projecting portions 28 that project to one side in the axial direction (opening side of the cable housing portion 22) at predetermined intervals in the circumferential direction. It has 28a and a pair of leg part 28b, and is bent and formed in a substantially U shape.

  Therefore, as schematically shown in FIG. 5A, the power collection and distribution cables 21u, 21v, 21w and the neutral point cable 26 are arranged so as to gradually become smaller in this order. However, as shown in FIG. 5 (b), the heights of the lead-out portions 35u, 35v, 35w of the power collection / distribution cables 21u, 21v, 21w are changed to make the resistances of the power collection / distribution cables 21u, 21v, 21w equal. Thus, the cables 21u, 21v, and 21w are formed to have the same length. Note that the lead portions 35v and 35w may be formed to be bent so that the heights of the input terminals 36u, 36v, and 36w of the cables 21u, 21v, and 21w are matched (see FIG. 5C). .

  In the state where the power collection / distribution cable group 21 and the neutral point cable 26 are held by the fixing portion 29 in the cable storage portion 24d, the intermediate portions 27a of the projections 27 of the power collection / distribution cables 21u, 21v, 21w are the stator pieces. 20 is sequentially accommodated in the caulking portion 31 b of one terminal 31, and the intermediate portion 28 a of the other protruding portion 28 of the neutral point cable 26 is also accommodated in the caulking portion 32 b of the other terminal 32.

  In addition, in the caulking portion 31 b of one terminal 31, one end portion 25 a of any one of the coils 25 of the plurality of stator pieces 20 is connected to the protruding portions 27 of the power distribution cables 21 u, 21 v, 21 w and the stator 12. It is accommodated so as to overlap in the axial direction. One end 25a of the coil 25 is drawn outward in the radial direction through a groove 24g formed in the wall 24e of the insulator 24. In this way, one end 25a of the coil 25 and any one of the protruding portions 27 of the plurality of power collection and distribution cables 21u, 21v, and 21w are connected in the caulking portion 31b of the terminal 31 by a fusing process described later. As a result, the first connection portion C1 is formed.

  Further, in the caulking portion 32 b of the other terminal 32, the other end portion 25 b of one of the coils 25 of the plurality of stator pieces 20 is accommodated so as to overlap in the axial direction of the stator 12. The other end 25 b of the coil 25 is drawn out radially outward through a groove 24 h formed in the wall 24 e of the insulator 24. In this way, the other end portion 25b of the coil 25 and the other protruding portion 28 of the neutral point ring 26 are connected in the caulking portion 32b of the terminal 32 by the fusing process described later, so that the second. Connecting portion C2.

  Therefore, in the stator 12 to which the plurality of stator pieces 20 are coupled, the first connection portions C1 of the respective power collection and distribution cables 21u, 21v, 21w are sequentially arranged in the circumferential direction, and each of these first connection portions is arranged. C1 and the second connection portions C2 of the neutral point ring 26 are alternately arranged in the circumferential direction.

  Further, the caulking portions 31b and 32b of the terminals 31 and 32 arranged in the cable storage portion 24d by the fixing portion 29 are centered on the center point of the stator 12 between the inner peripheral end and the outer peripheral end in the cable storage portion 24d. It is provided so as to be positioned on the virtual circle C.

  Thereby, each 1st connection part C1 to which one end part 25a of each coil 25 of each stator piece 20 and each power collection and distribution cable 21u, 21v, and 21w are connected is located on the virtual circle C. Further, each second connection portion C2 to which the other end portion 25b of the coil 25 of each stator piece 20 and the neutral cable 26 are connected is also located on the virtual circle C.

  In the present embodiment, the virtual circle C is substantially in the radial direction between the inner peripheral end and the outer peripheral end of the cable housing portion 24d from the center point O of the stator 12 so that a space for fusing is secured. The position is the radius.

  Moreover, since each protrusion part 27 of the power collection / distribution cables 21u, 21v, and 21w and the other protrusion part 28 of the neutral point cable 26 are located on the virtual circle C, the leg part 27b of each protrusion part 27 and 28, 28b inclines toward the virtual circle C, respectively. Specifically, the leg portions 27a of the projecting portions 27 of the power collection and distribution cables 21u and 21v are inclined toward the inner circumference side toward the virtual circle C, and are neutral with the leg portions 27a of the projection portions 27 of the power collection and distribution cable 21w. The leg portions 28a of the other protruding portions 28 of the point cable 26 are inclined toward the outer peripheral side toward the virtual circle C.

  Here, the fusing process in each connection part C1 and C2 is performed using a pair of electrodes 40 and 41 as shown to Fig.6 (a). The front-facing surfaces of these electrodes 40 and 41 are formed in the same shape as each other, and each of the electrodes 40 and 41 is formed in a stepped shape with two recesses 40a, 40b, 41a and 41b. Specifically, in the case of the first connection portion C1 that connects any one of the power collection and distribution cables 21u, 21v, and 21w and one end portion 25a of the coil 25 with different diameters, as shown in FIG. In addition, by caulking the caulking portion 31b of the terminal 31 with the electrodes 40 and 41 using the two concave portions 40a, 40b, 41a and 41b of the electrodes 40 and 41, these cables 21u, 21v and 21w are connected to one end. The part 25a is included in the caulking part 31b. Then, by passing a current through these electrodes 40 and 41, the terminal 31 generates heat, and melts any one of the power collection and distribution cables 21u, 21v, and 21w and one end portion 25a of the coil 25 to be electrically connected ( Fusing).

  Further, in the case of the second connection portion C2 that connects the neutral point cable 26 and the other end portion 25b of the coil 25 with substantially the same diameter, as shown in FIG. By caulking the caulking portion 32b of the terminal 32 with the electrodes 40 and 41 so that the cable 26 and the coil 25 are positioned on the side of the concave portions 40b and 41b near the tip of the cable, the cable 26 and the other end portion 25b It is enclosed by the caulking portion 32b. Then, when a current is passed through these electrodes 40 and 41, the terminal 32 generates heat and melts the covering of the neutral point cable 26 and the other end portion 25b of the coil 25 so as to be electrically connected (fused). .

  At this time, in the first connection portion C1 and the second connection portion C2, the caulking direction and the neutrality of the power collection and distribution cables 21u, 21v, 21w of either phase and the one end portion 25b of the coil 25 are neutralized. Since the caulking direction of the point cable 26 and the other end 25b of the coil 25 is the same, the fusing process at each of the connecting portions C1 and C2 can be easily performed. Further, since the first connection portion C1 and the second connection portion C2 are respectively located on the virtual circle C, as shown in FIG. 7, the power collection / distribution cables 21u, 21v, 21w of any phase and the coil 25 are provided. When caulking one end portion 25b of the cable and when caulking the neutral cable 26 and the other end portion 25b of the coil 25, the device having the electrodes 40 and 41 is positioned at a predetermined position, and the stator The fusing process is performed at each of the connection portions C1 and C2 while relatively rotating the 12 by a predetermined angle. For this reason, it is not necessary to move the apparatus itself which has the electrodes 40 and 41 to radial direction, and can perform a fusing easily.

  Further, as shown in FIG. 4, there is a penetration portion between each phase of the power collection / distribution cables 21 u, 21 v, 21 w and the neutral point cable 26 and the protruding portions 27, 28 of the neutral point cable 26 and the cable storage portion 24 d of the insulator 24. 33 and 34 are formed. Here, the lead-out portion 35v of the V-phase power collection / distribution cable 21v is drawn out through the penetration portion 33 of the U-phase power collection / distribution cable 21u. In addition, the lead-out portion 35w of the W-phase power collection / distribution cable 21w is drawn out through the penetration portion 33 of the V-phase power collection / distribution cable 21v. Thereby, each drawer | drawing-out part 35v and 35w are pulled out outside, without interfering with the other power collection / distribution cables 21u and 21v. Since the U-phase power collection / distribution cable 21u is on the outermost peripheral side, the lead-out portion 35u is pulled out from any location without interfering with the other-phase power collection / distribution cables 21v, 21w.

  As described above, according to the rotating electrical machine 1 of the present embodiment, one end portion 25a of the coil 25 of any of the plurality of stator pieces 20 is drawn outward in the radial direction, and the power collection and distribution cables 21u, 21v. , 21w is connected to any one of the power collection and distribution cables 21u, 21v, and 21w at the first connection portion C1 that overlaps in the axial direction, and one end portion 25a of the coil 25 of each stator piece 20 and each power collection and distribution cable. Each of the first connection portions C1 to which 21u, 21v, and 21w are connected is located on a virtual circle C centered on the center point O of the stator 12 between the inner peripheral end and the outer peripheral end in the cable storage portion 24d. . As a result, the number of the first connecting portions C1 to be fused is reduced, and each first connecting portion C1 can be fused at substantially the same radial position, so that efficient fusing can be performed.

  Further, since the tip 23c on the rotor facing surface side of the tooth 23b and the rotor facing surface side flange 24b of the insulator 24 are formed substantially flush with each other in the axial direction, there is no gap between the rotor 13 and the stator 12. It is difficult for the oil gap to form in the air gap, and the resistance when oil flows can be reduced.

  Further, the ring-shaped neutral point cable 26 that connects the other end 25b of the coil 25 of each stator piece 20 is disposed in the cable storage portion 24d on the radially inner side of the power collection and distribution cable group 21, so that the insulator 24 It is no longer necessary to protrude the inner side of the stator 12 in the radial direction, making it difficult to retain oil in the air gap between the rotor and the stator, thereby reducing the resistance. Further, the other end portion 25b of the coil 25 of the plurality of stator pieces 20 is drawn to the outside in the radial direction, and is connected to the neutral point cable 26 by the second connection portion C2 that overlaps the neutral point cable 26 in the axial direction. Therefore, unlike the prior art, it is not necessary to extend the other end 25b of the coil 25 to the adjacent stator piece 20, and the coil 25 can be shortened. Further, each second connecting portion C2 to which the other end portion 25b of the coil 25 of each stator piece 20 and the neutral point cable 26 are connected is a virtual portion between the inner peripheral end and the outer peripheral end in the cable storage portion 24d. Since it is located on the circle C, each of the first connection portions C1 and each of the second connection portions C2 can be fused at substantially the same radial position, and efficient fusing can be performed.

  In addition, the caulking direction in which one end portion 25a of the coil 25 of each stator piece 20 and each of the power collecting and distribution cables 21u, 21v, and 21w in the first connecting portion C1 and the second connecting portion C2 are caulked. Since the caulking direction of the other end 25b of the coil 25 of each stator piece 20 and the neutral point cable 26 is the same, the fusing process can be easily performed and automation is facilitated.

  Moreover, since each power collection / distribution cable 21u, 21v, 21w is provided with the some protrusion part 27 which each protrudes in the axial direction one side at each 1st connection part C1, the fusing process in 1st connection part C1 Can be easily performed.

  Furthermore, each power collection / distribution cable 21u, 21v, 21w is provided with a plurality of projecting portions 27 projecting to one side in the axial direction at each first connection portion C1, and the neutral point cable 26 is connected to each second connection Since the plurality of other protruding portions 28 that protrude to the one side in the axial direction at the portion C2 are provided, the fusing process at the first connecting portion C1 and the second connecting portion C2 can be easily performed.

  Moreover, in the power collection and distribution cable group 21, the protruding portions 27 of the power collection and distribution cables 21u, 21v, and 21w arranged on the radially inner and outer circumferential sides are inclined toward the virtual circle C. Each first connection portion C1 can be arranged on the virtual circle C so as not to interfere with the power collection and distribution cables 21u, 21v, 21w and the neutral point cable 26.

  Further, the projecting portion 27 forms penetrating portions 33 and 34 by projecting the power collection and distribution cables 21u, 21v and 21w and the neutral point cable 26 into a U shape. 35w is pulled out to the outside through the penetrating portion 33, so that even if the power collection and distribution cables 21u, 21v, 21w and the neutral point cable 26 are juxtaposed in the radial direction, the lead portions 35v, 35w of each phase are not interfered with each other. It is pulled out from the cable storage portion 24d.

  Further, one end portion 25a of each coil 25 of each stator piece 20 and each power collecting and distribution cable 21u, 21v, 21w, and the other end portion 25b of each coil 25 of each stator piece 20 and the neutral point cable 26 are respectively connected. Therefore, a plurality of terminals 31 and 32 disposed in the first connection portion C1 and the second connection portion C2, respectively, between the first connection portion C1 and the second connection portion C2 adjacent to each other, A plurality of fixing portions that respectively fix the pair of terminals 31 and 32 so that the pair of terminals 31 and 32 disposed in one connection portion C1 and the second connection portion C2 extend toward both sides in the circumferential direction of the stator 12. 29, the fixing portion 29 for fixing the terminal 31 of the first connection portion C1 and the fixing portion 29 for fixing the terminal 32 of the second connection portion C2 can be shared. It is possible to reduce the number of parts.

  Further, since the fixing portion 29 fixes at least one of the power collection / distribution cables 21u, 21v, 21w and the neutral point cable 26, the fixing portion 29 for fixing the terminals 31, 32 is used as the power collection / distribution cables 21u, 21v, 21w and the middle. The sex point cable 26 can be used as a member for fixing to the stator piece 20, and the number of parts can be reduced.

  Further, since the virtual circle C has a radius at a substantially intermediate position in the radial direction from the center point O of the stator 12 to the outer peripheral end in the cable storage portion 24d, the connection portions C1 and C2 are connected to the cable storage portion 24d. An intermediate position can be set, a space for fusing is secured, and fusing can be performed easily.

  The rotating electrical machine of the present invention is not limited to the above-described embodiment, and appropriate modifications and improvements can be made.

  In the present embodiment, one end 25a of the coil 25 of any one of the plurality of stator pieces 20 is disposed so as to overlap with any one of the power collection and distribution cables 21u, 21v, and 21w in the first connecting portion C2. However, they may be arranged so as to overlap in the radial direction.

  Further, the other end portions 25b of the coils 25 of the plurality of stator pieces 20 are also arranged so as to overlap in the axial direction at the neutral point cable 26 and the second connection portion C2, but are arranged so as to overlap in the radial direction. May be.

  In addition, the neutral point cable 26 of the present invention may be stored in the cable storage portion 24d on the inside or outside in the radial direction of the power collection / distribution cable group 21; Thus, the neutral point cable 26 can be shortened and the resistance can be lowered.

  Moreover, although the power collection and distribution cables 21u, 21v, and 21w are continuously formed in a ring shape, as shown in FIG. 8A, they are cut in the middle, for example, to make the length of each phase the same. You can also In this case, as shown in FIG. 8B, the lengths of the respective power collection and distribution cables 21u, 21v, and 21w can be made equal. However, it is preferable that the ring is continuously formed from the viewpoint of rigidity and assemblability. The neutral point cable 26 is continuously formed in a ring shape.

  In the present embodiment, each fixing portion 29 is provided so as to support the pair of terminals 31 and 32, but the fixing portion 29 may be provided for each of the terminals 31 and 32.

  In the present embodiment, the fixing unit 29 holds and fixes both the power collection and distribution cables 21u, 21v, 21w and the neutral point cable 26. However, at least one of these cables may be fixed. Good.

  Further, in the present embodiment, the pair of terminals 31 and 32 are formed integrally with the fixed portion 29, but the power collection and distribution cables 21u, 21v, and 21w and the neutral point ring 26 may also be integrally formed by insert molding. Good.

It is a front view which shows the rotary electric machine which concerns on one Embodiment of this invention. It is a front view which expands and shows a part of stator of FIG. It is a disassembled perspective view of a stator piece. It is a perspective view which shows the power collection / distribution cable and neutral point ring in the drawer part of a power collection / distribution cable. (A) is a front view showing a substantially ring-shaped power collection / distribution cable and a neutral point cable, and (b) is a side view of a main part showing a lead-out portion of the power collection / distribution cable as viewed from the V direction of (a). It is a figure and (c) is a principal part side view which shows the modification of (b). (A) is a front view of the electrode in a fusing process, (b) is a figure which shows the state which caulks a power collection and distribution cable and a coil, (c) is caulking a neutral point ring and a coil It is a figure which shows a state. FIG. 3 is an enlarged front view showing a part of a stator in order to explain a fusing process. (A) is a front view showing a substantially ring-shaped power collection / distribution cable and a neutral point cable cut along the way, (b) is a lead-out portion of the power collection / distribution cable as viewed from the VIII direction of (a) FIG. It is a front view which shows the stator piece of the conventional rotary electric machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Rotating electrical machine 12 Stator 20 Stator piece 21 Power collection / distribution cable group 21u, 21v, 21w Power collection / distribution cable 23 Split core 23b Teeth 24 Insulator 24c Winding part 24d Cable storage part 24e Wall part 25 Coil 25a One end part 25b The other end Part 26 Neutral point cable 27 Projection part 28 Other projection part 29 Fixing part 31, 32 Terminal (connection terminal)
33, 34 penetration part 35u, 35v, 35w drawer part C virtual circle C1 1st connection part C2 2nd connection part

Claims (11)

A split core having teeth, an insulator that electrically insulates the teeth, a plurality of stator pieces each having a coil wound around the teeth via the insulator, and a substantially ring-like shape provided for each phase A plurality of power collection and distribution cables;
The plurality of stator pieces are connected in a ring shape, and one end of the coil of any of the plurality of stator pieces is connected to one of the plurality of power collection and distribution cables by a first connection portion. A rotating electric machine comprising a stator configured,
The power collection and distribution cables of each phase are arranged side by side in the radial direction to constitute a power collection and distribution cable group,
The insulator is arranged around the teeth, and a winding portion around which the coil is wound, and an arc-shaped connection region in which the first connection portion is arranged radially outside the winding portion. And a wall that separates the winding part and the connection region,
One end portion of the coil of any one of the plurality of stator pieces is drawn out radially outward, and is the first connection portion that overlaps any one of the power collection and distribution cables in the axial direction or the radial direction. Connected to one of the cables,
Each of the first connecting portions to which one end of the coil of each stator piece and each of the power collection and distribution cables are connected is a center point of the stator between the inner peripheral end and the outer peripheral end in the connection region. A rotating electrical machine characterized by being located on a virtual circle as a center.   2. The rotating electrical machine according to claim 1, wherein a tip portion of the teeth on the rotor facing surface side and a rotor facing surface side flange of the insulator are formed substantially flush with each other in the axial direction. A substantially ring-shaped neutral point cable that is arranged in the connection region at the radially inner side or the outer side of the power collection and distribution cable group and connects the other end of the coil of each stator piece;
The other end of the coils of the plurality of stator pieces is drawn out radially outward, and is connected to the neutral point cable at a second connection portion that overlaps the neutral point cable in the axial direction or radial direction,
Each second connection part to which the other end of the coil of each stator piece and the neutral cable are connected is located on the virtual circle between the inner peripheral end and the outer peripheral end in the connection region. The rotating electrical machine according to claim 1 or 2, wherein   In the first connection portion, one end portion of the coil of each stator piece and each of the power collection and distribution cables are caulked, and the other connection portion of the coil of each stator piece in the second connection portion. The rotating electrical machine according to claim 3, wherein a caulking direction for caulking the end portion and the neutral point cable is the same.   3. The rotating electrical machine according to claim 1, wherein each of the power collection and distribution cables includes a plurality of projecting portions that project to one side in the axial direction at each of the first connection portions.   Each of the power collection and distribution cables includes a plurality of projecting portions that project to one side in the axial direction at each of the first connection portions, and the neutral point cable includes the axial direction at each of the second connection portions. 5. The rotating electrical machine according to claim 3, further comprising a plurality of other projecting portions each projecting to one side.   In the said power collection and distribution cable group, each said protrusion part of the said power collection and distribution cable arrange | positioned at radial direction inner peripheral side and outer peripheral side is respectively inclined toward the said virtual circle, 6. The rotating electrical machine according to 6. The protruding portion forms a penetrating portion when the power collection and distribution cable and the neutral point cable protrude in a U shape,
The rotating electrical machine according to claim 6 or 7, wherein the lead-out portion of the power collection and distribution cable is drawn out through the through portion. In order to connect one end of the coil of each stator piece and each of the power collection and distribution cables, and the other end of the coil of each stator piece and the neutral point cable, respectively, the first connection part and A plurality of connection terminals arranged in the second connection portion;
The pair of connection terminals that are arranged between the first connection portion and the second connection portion that are adjacent to each other, and are arranged on the first connection portion and the second connection portion, on both sides in the circumferential direction of the stator. The rotating electrical machine according to claim 3, further comprising a plurality of fixing portions that respectively fix the pair of connection terminals so as to extend toward the center.   The rotating electrical machine according to claim 9, wherein the fixing portion fixes at least one of the power collection / distribution cable and the neutral point cable.   4. The rotating electrical machine according to claim 1, wherein the virtual circle has a radius at a substantially intermediate position in a radial direction between an inner peripheral end and an outer peripheral end in the connection region from a center point of the stator.

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