JP5666976B2 - Rotating electric machine - Google Patents

Description

  The present invention relates to a rotating electrical machine having a stator core formed by annularly arranging a plurality of divided core portions.

  2. Description of the Related Art Conventionally, a stator incorporated in a rotating electrical machine has a split core portion that includes a split core, an insulator that surrounds a part of the split core, and a coil conductor that winds the split core via the insulator. It is formed by arranging a plurality.

  In Patent Document 1, a recess (conductor end holding groove) is formed along the circumferential direction on the outer peripheral surface of the insulator, and the end of the coil conductor wound around the insulator is accommodated in the conductor end holding groove. Thus, a stator that has been routed to a position where it is connected to a power supply line has been proposed.

JP 2000-217293 A

  However, in the stator of Patent Document 1, unless the conductor end holding groove is accurately manufactured, the end of the coil conductor slides with the wall of the conductor end holding groove due to vibration during operation of the rotating electrical machine. There is a possibility that the insulating coating of the coil conductor is broken.

  The present invention has been made in consideration of such problems, and provides a rotating electrical machine that can reliably hold the end of a coil conductor in a conductor end holding groove even if vibration occurs. The purpose is to do.

In order to achieve the above object, the present invention is a rotating electrical machine incorporating a stator having a stator core formed by annularly arranging a plurality of divided core portions,
Each of the split core portions has a split core, an insulator surrounding a part of the split core, and a coil conductor wound around the split core via the insulator,
Conductor end holding grooves extending along the circumferential direction of the stator core and extending around the ends of the coil conductors are respectively formed at locations on the outer peripheral surface of the stator core in each insulator.
The coil conductor is a rectangular wire having a rectangular cross section,
The bottom of each of the conductor end holding grooves is an inclined part,
The width of each of the conductive wire end holding grooves is set to be wider than the width of the end of the coil conductive wire and not more than the length of the diagonal line of the rectangle.

  According to this configuration, by setting the width of each conductive wire end holding groove wider than the width of the end of the coil conductive wire and not more than the length of the diagonal line of the cross section, the end of the coil conductive wire When the end of the coil conductor is inclined along the inclined portion in the conductor end holding groove when the portion is housed in the conductor end holding groove, the conductor end is formed at two vertices of the diagonal line. Both wall portions of the portion holding groove are pressed by point contact. Thereby, the pressing force from the edge part of the said coil conducting wire to the said both wall part becomes large, and the edge part of the said coil conducting wire can be reliably hold | maintained by the said both wall part.

  When the stator in which the end of the coil conductor drawn in this way is housed in the rotating electrical machine is operated in the rotary electric machine, the end of the coil conductor is pressed by the point contact. In this case, even if vibration occurs, sliding between the end portion of the coil conductor and the wall portion of the conductor end portion holding groove can be suppressed, and the insulation coating can be destroyed. Can be prevented.

  Therefore, according to the present invention, it is possible to reliably hold the end portion of the coil conducting wire in the conducting wire end holding groove even if vibration occurs.

  In this case, when the end portion of the coil conductor wire is housed in each of the conductor wire end portion holding grooves, the two vertices on the diagonal line of the rectangular portion of the inclined portion serve as both wall portions of the conductor wire end portion holding groove. The angle is set such that the long side on the inclined portion side presses the inclined portion by surface contact while pressing by point contact.

  In this way, when the end of the coil conductor is housed in each of the conductor end holding grooves, the width of each of the conductor end holding grooves and the length of the diagonal line substantially coincide with each other to form the diagonal line. Since the width of each of the conductor end holding grooves along the line is maximized, the two apexes are brought into contact with the both wall portions by point contact in a sectional view, and the long side on the inclined portion side is brought into surface contact with each other. The inclined portion can be contacted. Thereby, the edge part of the said coil conducting wire can be reliably hold | maintained in each said conducting wire end part holding groove.

  According to the present invention, even if vibration occurs, it is possible to reliably hold the end portion of the coil lead wire in the lead end holding groove.

It is a top view of the stator integrated in the rotary electric machine which concerns on this embodiment. It is a perspective view of the division | segmentation core part of FIG. It is a disassembled perspective view of the division | segmentation core part of FIG. It is a partial front view of the insulator of FIG. FIG. 3 is a partial cross-sectional view of the insulator of FIG. 2. 6A and 6B are explanatory views schematically showing the storage of the end of the coil wire in the conducting wire end holding groove. It is a partial perspective view of the insulator of FIG. FIG. 8A is a partial side view of the insulator of FIG. 2, and FIG. 8B is an enlarged partial side view of the insulator. It is explanatory drawing which illustrated typically routing of the edge part of the coil strand to a conducting wire end holding groove. FIG. 10A is a partial cross-sectional view illustrating a case where the end portion of the coil wire is housed in the conducting wire end holding groove by a conventional routing method, and FIG. 10B illustrates the conducting wire end holding groove in the present embodiment. It is a partial cross section figure which illustrated accommodation of the edge part of a coil strand.

  A preferred embodiment of a rotating electrical machine according to the present invention in relation to a stator incorporated therein will be described in detail below with reference to the accompanying drawings.

  FIG. 1 is a plan view of a stator 10 incorporated in the rotating electrical machine according to the present embodiment. The stator 10 constitutes a rotating electric machine in combination with a rotor (not shown) provided therein, and is used as, for example, an electric motor or a generator.

  The stator 10 is a so-called three-phase Y-type salient-pole stator, and as shown in FIG. 1, a hollow holder 12 and three-phase input terminals U, V, W provided on the holder 12 A neutral terminal N that forms a neutral point, and a stator core 16 that is formed by annularly arranging a plurality (18 in FIG. 1) of divided core portions 14 along the inner peripheral surface 12 a of the holder 12. ing.

  The stator core 16 includes six divided core portions 14 each having U-phase, V-phase, and W-phase coils 18. In this case, in the stator core 16, the plurality of divided core portions 14 are arranged in a ring shape, whereby a U phase (U1 phase to U6 phase), a V phase (V1 phase to V6 phase), and a W phase (W1 phase to W6). 1 are arranged in the order of U1, V1, W1, U2,..., U6, V6, W6 in the clockwise direction of FIG.

  Next, among the divided core portions 14 having the coils 18 of the U1 phase to the U6 phase, the V1 phase to the V6 phase, and the W1 phase to the W6 phase, the configuration of one divided core portion 14 is typically shown in FIG. Description will be given with reference to FIG. In addition, the structure of the split core part 14 demonstrated here is a structure common to the split core part 14 of all the phases.

  The split core portion 14 includes a split iron core 24 configured by laminating a plurality of substantially T-shaped metal plates (steel plates) 22 punched by a press, an insulator 26 that electrically insulates the split iron core 24, and an insulator 26. And a coil 18 composed of a coil wire (coil conductor) 18a wound around the split iron core 24. The coil wire 18a is a rectangular wire having a rectangular cross section.

  The substantially T-shaped split iron core 24 includes a yoke portion 24a extending along the arrow C direction (the circumferential direction of the stator core 16) on the arrow B1 direction (direction toward the outside of the stator core 16) side, and an arrow from the yoke portion 24a. It is comprised from the magnetic pole part 24b extended toward B2 direction (direction toward the inner side of the stator core 16). Also, a substantially semicircular fitting recess 32 is formed at the end of the yoke portion 24a in the arrow C2 direction, and an approximately half corresponding to the fitting recess 32 is formed at the end of the yoke portion 24a in the arrow C1 direction. A circular fitting convex portion 34 is formed.

  The insulator 26 is made of an electrically insulating material such as a flexible resin. The insulator 26 protrudes in the direction of arrow B1 from the winding portion 38 around which the coil wire 18a is wound, and the end portion (starting end portion or terminal end portion) of the coil strand 18a extends in the arrow C direction. And a routing portion 40 for routing to the locations of the input terminals U, V, W and the neutral terminal N.

  The winding portion 38 includes an upper winding portion 38a and a lower winding portion 38b that can be fitted in the direction of arrow A (vertical direction).

  The upper winding portion 38a includes an upper winding portion main body 42a having a substantially U-shaped cross section, an upper inner peripheral wall 44a erected at an end in the arrow B2 direction of the upper winding portion main body 42a, and an upper inner peripheral wall. And an upper outer peripheral wall 46a erected on the end of the upper winding portion main body 42a in the direction of the arrow B1 so as to face 44a.

  The lower winding portion 38b has a lower winding portion main body 42b formed in a substantially U-shaped cross section so as to face the upper winding portion main body 42a and a lower winding portion so as to face the upper inner peripheral wall 44a. A lower inner peripheral wall 44b erected at the end in the arrow B2 direction of the part main body 42b, and a lower erected at the end in the arrow B1 direction of the lower winding part main body 42b so as to face the lower inner peripheral wall 44b. Side outer peripheral wall 46b.

  Therefore, when the upper winding portion 38a and the lower winding portion 38b are fitted so as to sandwich the magnetic pole portion 24b of the split iron core 24, the upper winding portion main body 42a, the lower winding portion main body 42b, and the upper inner peripheral wall 44a and the lower inner peripheral wall 44b, and the upper outer peripheral wall 46a and the lower outer peripheral wall 46b are partially overlapped and joined. That is, by inserting the lower winding portion 38b from below the upper winding portion 38a, the upper winding portion 38a and the lower winding portion 38b are integrated to form the winding portion 38. A hole 48 is formed in the center of the winding portion 38 along the direction of arrow B. Thereby, while the magnetic pole part 24b fits in the hole 48, the coil is formed at a location between the upper inner peripheral wall 44a and the lower inner peripheral wall 44b and the upper outer peripheral wall 46a and the lower outer peripheral wall 46b in the winding part 38. The coil 18 is configured by winding the wire 18a.

  On the other hand, the routing portion 40 is provided so as to protrude in the arrow B1 direction from the vicinity of the upper end portion of the upper outer peripheral wall 46a.

  The lead-out portion 40 is formed on the plate-like member 50 and the plate-like member 50, and is substantially U-shaped in the plan view of FIG. 1, and behind the lead wire storage portion 52 (on the back in the direction of arrow B2). And a terminal fixing portion 54 that fixes the terminal portion of the coil wire 18 a wound around the winding portion 38.

  The conducting wire storage portion 52 is configured to be able to store the starting end portion or the terminating end portion of the coil wire 18 a wound around the winding portion 38 in the direction of arrow C.

  That is, the conducting wire storage part 52 connects the blocks 52a and 52b standing on the arrow C2 direction side and the arrow C1 direction side of the plate-like member 50 respectively, and the connecting part 52c connecting the back surfaces of the blocks 52a and 52b in the arrow B2 direction. It consists of. The block 52a extends in the direction of the arrow C, and has a width (length along the direction of the arrow A) and a depth (direction of the arrow B) that can accommodate the start end or the end of the rectangular coil wire 18a. Conductive wire end holding grooves 56a to 62a having a depth along the arrow A are provided at predetermined intervals. On the other hand, similarly to the block 52a, the block 52b extends in the direction of the arrow C, and has a width and depth that can accommodate the start end or the end of the coil wire 18a. 62b are provided at predetermined intervals in the arrow A direction. As shown in FIGS. 2 to 5, the conductor end holding groove 56a and the conductor end holding groove 56b, the conductor end holding groove 58a and the conductor end holding groove 58b, the conductor end holding groove 60a and the conductor end. The holding groove 60b, the conductor end holding groove 62a, and the conductor end holding groove 62b are formed at substantially the same height.

  In addition, the portions that define the conductive wire end holding grooves 56a to 62a in the block 52a are bowl-shaped wall portions 66a to 74a that extend in a flat plate shape from the main body portion 64a of the block 52a in the arrow B1 direction and the arrow C2 direction. Configured as Also in the block 52b, as in the case of the block 52a, the portions defining the conductive wire end holding grooves 56b to 62b extend from the main body 64b of the block 52b in a flat plate shape in the arrow B1 direction and the arrow C1 direction. It is comprised as a shape | molded wall part 66b-74b. The wall portions 72a and 72b are connected in the direction of arrow C by a connecting portion 76.

  Furthermore, the bottom surfaces 100a to 106a and 100b to 106b (surfaces of the main body portions 64a and 64b in the direction of the arrow B1) of the conductor end holding grooves 56a to 62a and 56b to 62b are indicated by arrows as shown in FIGS. It is configured as an inclined portion inclined downward along the A direction.

  By the way, in the stator core 16, in each divided core part 14, the coil wire 18a of the rectangular wire of the same shape is each wound, and the coil 18 is comprised. In the conducting wire storage part 52, with respect to the starting end or terminal end of the coil wire 18a, the long side of the rectangular wire is placed along the bottom surfaces 100a to 106a, 100b to 106b (see FIGS. 5 to 6B), and the arrow C It is drawn around in the direction and accommodated in each of the conductor end holding grooves 56a to 62a and 56b to 62b. Therefore, as shown in FIGS. 4 and 5, the conductor end holding grooves 56 a to 62 a and 56 b to 62 b have substantially the same width (height). Also, as shown in FIG. 5, among the conductor end holding grooves 56 a to 62 a and 56 b to 62 b, the depth of the uppermost conductor end holding grooves 56 a and 56 b is set to the other conductor end holding grooves 58 a to 58 b. It is deeper than the depth of 62a, 58b-62b. Furthermore, the depths of the other conductor end holding grooves 58a to 62a and 58b to 62b are substantially the same depth.

  The conductor end holding groove 56a and the conductor end holding groove 56b, the conductor end holding groove 58a and the conductor end holding groove 58b, the conductor end holding groove 60a, the conductor end holding groove 60b, and the conductor end holding groove 62a. And the conducting wire end holding groove 62b draw and house the starting end or terminating end of the same coil wire 18a.

  Specifically, the starting end portion of each coil wire 18a constituting the U1 phase to U6 phase coil 18 is connected to the input terminal U, and the starting end portion of each coil wire 18a constituting the V1 phase to V6 phase coil 18 is connected. Is connected to the input terminal V, and the starting end of each coil wire 18a constituting the W1 phase to W6 phase coil 18 is connected to the input terminal W, and all phases (U1 to U6 phase, V1 to V6 phase, W1) are connected. The terminal portion of each coil wire 18 a constituting the coil 18 of (˜W6 phase) is connected to the neutral terminal N.

  Therefore, in the deepest conductive wire end holding grooves 56a and 56b, the terminal portions of 18 coil wires 18a in total are drawn and stored from all phases. In this case, an end fixing portion 54 for fixing the end portion of the coil wire 18a is disposed behind the block 52b. As shown in FIG. 7, the terminal fixing portion 54 has a width that is substantially the same as the width of the long side of the coil wire 18 a, and a standing portion 54 a that stands in the direction of arrow A along the block 52 b, It is comprised from the wall part 54b bulging from the arrow B2 direction side of the standing part 54a. Therefore, in each divided core portion 14, the terminal portion of the coil wire 18 a wound around its own winding portion 38 has the long side of the rectangular wire along the surface of the standing portion 54 a and the short side. The side is fixed to the terminal fixing portion 54 in a state along the wall portion 54b and the block 52b, and is drawn around the conductor end holding grooves 56a and 56b. 4 and 5 show a case in which the terminal portion of each coil wire 18a is routed and stored in the conductor end holding grooves 56a and 56b as an example of routing.

  Also, with respect to the other conductor end portion holding grooves 58a to 62a and 58b to 62b having a depth shallower than that of the conductor end portion holding grooves 56a and 56b, the conductor end portion holding grooves 58a and 58b have U1 phase to U6 phase. In total, the start ends of the six coil strands 18a are routed and stored, and the lead end holding grooves 60a, 60b have the start ends of the six coil strands 18a in total from the V1 phase to the V6 phase. The leading end portions of the six coil wires 18a in total in the W1 phase to W6 phase are routed and stored in the conductor end holding grooves 62a and 62b.

  Here, as shown in FIG. 4 and FIG. 5, in the state where the long side of the rectangular wire is aligned with the bottom surfaces 100 a to 106 a and 100 b to 106 b of the conductor end holding grooves 56 a to 62 a and 56 b to 62 b. When the starting end or the terminating end of each coil wire 18a is routed to the conducting wire end holding grooves 56a to 62a and 56b to 62b, the starting end or the terminating end of each coil strand 18a is stored as follows. Is done.

  That is, as described above, the bottom surfaces 100a to 106a and 100b to 106b of the conductor end holding grooves 56a to 62a and 56b to 62b are inclined downward along the direction of the arrow A in each split core portion 14. Yes.

  Therefore, when the starting end or terminal end of each coil wire 18a is stored in the conductor end holding grooves 56a to 62a, 56b to 62b, the starting end or terminal end of each coil wire 18a is the long side of the rectangular wire. The sides are routed along the bottom surfaces 100a to 106a and 100b to 106b, and the two vertices on the diagonal line of the rectangular rectangular line are respectively brought into contact with the upper and lower wall portions 66a to 74a and 66b to 74b. Accordingly, the long side of the rectangular wire presses the bottom surfaces 100a to 106a and 100b to 106b by surface contact, and the two apexes press the upper and lower wall portions 66a to 74a and 66b to 74b by point contact. As a result, the starting end portion or the terminal end portion of each coil wire 18a is housed in the conducting wire end holding grooves 56a to 62a and 56b to 62b, respectively, by these pressing forces.

  Here, as shown in FIGS. 6A and 6B, the length of the long side of the coil wire 18a is D, the length of the short side is W1, and the length of the diagonal is H1. Further, the width of the conductor end holding grooves 56a to 62a and 56b to 62b is H2, the inclination angle of the bottom surfaces 100a to 106a and 100b to 106b with respect to the arrow A direction is θ, and the coil element is formed by the inclination of the bottom surfaces 100a to 106a, The amount of inclination of the wire 18a (the amount of inclination of the bottom surfaces 100a to 106a, 100b to 106b) is W2, and each coil element when each coil element 18a is routed in the conductor end holding grooves 56a to 62a and 56b to 62b. The interval between the wires 18a (the interval between the apex of one coil strand 18a and the apex of the adjacent coil strand 18a) is W3, and the depths of the conductor end holding grooves 56a to 62a and 56b to 62b are W4.

In this case, if the number of coil strands 18a routed around one conductive wire end holding groove 56a to 62a, 56b to 62b is N, the width satisfies the following formulas (1) and (2). H2, inclination amount W2, interval W3, and depth W4 are set.
(W2 × 2 + W3 × N) ≦ W4 (1)
D <H2 ≦ H1 (2)

  Therefore, the inclination angle θ satisfies the above expressions (1) and (2), and the two vertices on the diagonal line in the rectangular rectangle are in point contact with the upper and lower wall portions 66a to 74a and 66b to 74b. It is desirable that the angle be set to a proper angle.

  If the above-mentioned various amounts are set in such a relationship, when the starting end or the terminal end of the coil wire 18a is stored, the starting end or the terminal end of the coil wire 18a is set to the bottom surface 100a to 106a, 100b to 106b. Can be accommodated in the conductor end holding grooves 56a to 62a and 56b to 62b without sliding with the walls 66a to 74a and 66b to 74b.

  6A illustrates the case where the coil wire 18a having a relatively short width on the short side is stored in the conductor end holding grooves 56a to 62a, 56b to 62b, and FIG. 6B illustrates the short side. The case where the coil wire 18a having a relatively small width (elongated) is housed in the conductor end holding grooves 56a to 62a and 56b to 62b is illustrated. In any case, the above-described formulas (1) and (2 The above-mentioned effects can be easily obtained by forming the conductor end holding grooves 56a to 62a and 56b to 62b so as to satisfy the above formula.

  As shown in FIGS. 8A and 8B, for example, a PL portion 110 corresponding to a PL (parting line) position when the insulator 26 is molded by a mold (not shown) on the side surfaces in the direction of arrow C of the walls 70a and 72a. In each PL part 110, there is a possibility that burrs may occur at the time of molding. Therefore, burrs are generated in a shape that is recessed in the direction of arrow B1 (a shape that reduces the diameter). Alternatively, a structure that avoids contact with the coil wire 18a may be used. 8A and 8B show the case where the PL portion 110 is formed on the side surfaces of the wall portions 70a and 72a as an example. However, if other portions of the insulator 26 also correspond to the PL position, Of course, the PL section 110 may also be provided in this place.

  The stator 10 incorporated in the rotating electrical machine according to the present embodiment is configured as described above. Next, with regard to the routing and storage of the coil wire 18a to each divided core portion 14, FIGS. 9 to 10B. Will be described with reference to FIG. In addition, in this description, it demonstrates, also referring FIGS. 1-8B as needed.

  9 shows the end of the coil wire 18a to the conductor end holding groove of one split core portion 14 (in FIG. 9, the conductor end holding grooves 56a and 56b (see FIGS. 4 to 6 and 10B)). It is explanatory drawing which illustrated typically routing of the coil end wire 18a).

  When actually manufacturing the rotating electrical machine (stator core 16), first, the coil 18 is formed by winding the coil wire 18a around the winding portion 38 for each divided core portion 14, and then adjacent to each other. By fitting the fitting concave portions 32 and the fitting convex portions 34 of the two divided core portions 14 to be arranged, the respective divided core portions 14 are annularly arranged to constitute the stator core 16, and then each coil wire Although the start end and the end end of 18a are routed, only one split core 14 is illustrated and described here for ease of explanation.

  When the terminal end of the coil wire 18a is routed to the conductor end holding grooves 56a and 56b for one split core portion 14, the coil wire 18a to be routed is tensioned by the three tension rollers 120 to 124. After that, the guide roller 126 guides the split core portion 14 and pushes it into the conductor end holding grooves 56a and 56b by the rotating action of the rotating cylindrical pushing jig 128 and the pushing action in the direction of the arrow B2. It will be.

  In this case, the width H2 of the conductive wire end holding grooves 56a and 56b is larger than the width D on the long side of the coil wire 18a and is equal to or less than the diagonal length H1 as shown in the equation (2). The bottom surfaces 100a and 100b are inclined at an inclination angle θ with respect to the arrow A direction. Therefore, when the end of the coil wire 18a is pushed into the conductor end holding grooves 56a and 56b with the long side aligned with the arrow A direction, the end of the coil wire 18a falls to the bottom surface 100a and 100b side. Thus, the long side of the terminal portion is in surface contact with the bottom surfaces 100a and 100b, and two vertices on the diagonal line are in point contact with the upper and lower wall portions 66a, 66b, 68a and 68b, respectively.

  Therefore, the terminal portion of the coil wire 18a pushed in by the pushing jig 128 has a pressing force due to surface contact from the long side to the bottom surface 100a, 100b, and upper and lower walls 66a, 66b, 68a, By the pressing force by the point contact to 68b, it is reliably held in the conducting wire end holding grooves 56a and 56b. In addition, since the conductor end holding grooves 56a and 56b are formed according to the formulas (1) and (2), the terminal end of the coil wire 18a is pushed into and led to the conductor end holding grooves 56a and 56b. It can be done easily.

  FIG. 10A illustrates accommodation of the terminal end of the coil wire 18a in the conductor end holding grooves 56a and 56b when the bottom surfaces 100a and 100b are not inclined (prior art). The storage of the terminal end of the coil wire 18a in the conductive wire end holding grooves 56a and 56b when the bottom surfaces 100a and 100b are inclined (this embodiment) is illustrated.

  As shown in FIG. 10A, in the prior art, since the bottom surfaces 100a and 100b are not inclined, when each coil wire 18a is accommodated in the conductor end holding grooves 56a and 56b, each coil strand 18a becomes a conductor end portion. The holding grooves 56a and 56b are stored with a gap in the vertical direction. When the stator 10 is configured using the split core portion 14 configured with such a gap, and the rotating electrical machine is assembled, the terminal portion of the coil wire 18a is vibrated by vibration during operation of the rotating electrical machine. 66a, 66b, 68a, 68b may be slid and the insulating coating of the coil wire 18a may be destroyed.

  On the other hand, in this embodiment, as shown in FIG. 10B, since the bottom surfaces 100a and 100b are inclined, the terminal portions of the respective coil wires 18a are formed on the bottom surfaces in the conductor end holding grooves 56a and 56b. Since it is stored in a state where it is held in surface contact with 100a, 100b and is held in point contact with the upper and lower wall portions 66a, 66b, 68a, 68b, the divided core portion 14 thus configured is used. When the stator 10 is configured and incorporated in a rotating electrical machine, the end of the coil wire 18a is firmly held as described above even if vibration occurs during the operation of the rotating electrical machine. Sliding between the terminal end portion 18a and the wall portions 66a, 66b, 68a, 68b can be suppressed, and destruction of the insulating coating can be prevented.

  9 to 10B, as an example, the case where the terminal end portion of the coil wire 18a is routed and stored in the conductor end holding grooves 56a and 56b has been described, but the other conductor end holding grooves 58a to 62a, Of course, the same effect can be obtained even when the starting end portion of the coil wire 18a is routed and stored in 58b to 62b.

  As described above, according to the rotating electrical machine according to the present embodiment (stator 10 incorporated in), the width H2 of each of the conductor end holding grooves 58a to 62a and 58b to 62b is set to the end of the coil wire 18a ( By setting the width (length) D of the starting end portion or the terminal end portion to be wider than the diagonal length H1 of the rectangle of the cross section (D <H2 ≦ H1), the end portion of the coil wire 18a Of the coil wire 18a along the bottom surfaces 100a to 106a and 100b to 106b in the conductor end holding grooves 58a to 62a and 58b to 62b. When the end portion is inclined, the upper and lower wall portions 66a to 74a and 66b to 74b are pressed by point contact at the two vertices of the diagonal line. As a result, the pressing force from the end of the coil wire 18a to the both walls 66a to 74a and 66b to 74b is increased, and the end of the coil wire 18a is moved by the both walls 66a to 74a and 66b to 74b. It can be held securely.

  When the stator 10 in which the end portion of the coil wire 18a routed in this manner is housed in the rotating electrical machine is operated in the conductor end portion holding grooves 58a to 62a and 58b to 62b, the end of the coil wire 18a is operated. Since the portion is held by both wall portions 66a to 74a and 66b to 74b by a pressing force due to point contact, even if vibration occurs, the end portion of the coil wire 18a and the wall portions 66a to 74a, 66b to 74b Can be prevented, and damage to the insulating coating can be prevented.

  Therefore, according to the present embodiment, even if vibration occurs, the end of the coil wire 18a can be reliably held in the conductor end holding grooves 56a to 62a and 56b to 62b.

  In this case, when the ends of the coil wire 18a are stored in the respective conductor end holding grooves 56a to 62a and 56b to 62b, the two vertices on the diagonal line are pointed to both the walls 66a to 74a and 66b to 74b. The inclination angles θ of the bottom surfaces 100a to 106a and 100b to 106b are set so that the long sides of the rectangular wires are pressed against the bottom surfaces 100a to 106a and 100b to 106b by surface contact, respectively.

  In this way, when the end of the coil wire 18a is housed in each of the conductor end holding grooves 56a to 62a, 56b to 62b, the width H2 of each of the conductor end holding grooves 56a to 62a, 56b to 62b and Since the diagonal length H1 substantially coincides and the width H2 of the conductor end holding grooves 56a to 62a and 56b to 62b along the diagonal line is maximized (H1 = H2), the two vertices are point-contacted. While making it contact with both wall part 66a-74a, 66b-74b, the long side of a flat wire can be made to contact this bottom face 100a-106a, 100b-106b by surface contact. Thereby, the edge part of the coil strand 18a can be reliably hold | maintained in each conducting wire end holding groove 56a-62a, 56b-62b.

  Further, by fixing the terminal end portion of the coil wire 18a to the terminal fixing portion 54, the occurrence of winding looseness can be avoided. Furthermore, by providing the recessed PL portion 110 corresponding to the PL position, contact with the coil wire 18a can be avoided even if burrs occur.

  The present invention is not limited to the above-described embodiment, and it is naturally possible to adopt various configurations without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Stator 14 ... Divided core part 16 ... Stator core 18 ... Coil 18a ... Coil strand 24 ... Divided core 26 ... Insulator 38 ... Winding part 40 ... Leading part 52 ... Conductive wire accommodating part 52a, 52b ... Block 54 ... Termination fixing part 56a-62a, 56b-62b ... Conductor end holding grooves 66a-74a, 66b-74b ... Walls 100a-106a, 100b-106b ... Bottom 120-124 ... Tension roller 126 ... Guide roller 128 ... Pushing jig

Claims (2)

A rotating electrical machine incorporating a stator having a stator core formed by annularly arranging a plurality of divided core portions,
Each of the split core portions has a split core, an insulator surrounding a part of the split core, and a coil conductor wound around the split core via the insulator,
Conductor end holding grooves extending along the circumferential direction of the stator core and extending around the ends of the coil conductors are respectively formed at locations on the outer peripheral surface of the stator core in each insulator.
The coil conductor is a rectangular wire having a rectangular cross section,
The bottom of each of the conductor end holding grooves is an inclined part,
The rotating electric machine characterized in that the width of each of the conductor end holding grooves is set to be wider than the width of the end of the coil conductor and not more than the length of the rectangular diagonal line. The rotating electrical machine according to claim 1, wherein
When the end portions of the coil conductor wires are accommodated in the respective conductor end portion holding grooves, the inclined portions are point-contacted with the two vertices on the diagonal line of the rectangular shape at both wall portions of the conductor end portion holding grooves. A rotating electrical machine characterized in that each of the pressing parts is set to an inclination angle such that the long side on the inclined part side presses the inclined part by surface contact.

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