JP2012029444A - Armature for rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an armature for a rotary electric machine for which upsizing of a coil end in an axial direction due to a junction of different turns is constrained.SOLUTION: A coil is constituted by joining a plurality of segment conductors together; a deformed skew projection 7b is provided with a first skew part 71b, a second skew part 71a and an offset bent part 77 that offsets the second skew part 71a in a radial direction R relative to the first skew part 71b; and the offset bent part 77 is configured in the same position in a circumferential direction C with any of the teeth 23 and configured to offset the second skew part 71a to the same position in the radial direction R with a skew projection 7a of a basic segment conductor 4a whose conductor side part is disposed on a layer adjacent in the radial direction R to a segment conductor to be joined for a deformed segment conductor 4b.

Description

  The present invention relates to an armature core including a plurality of teeth formed in a circumferential direction of a core reference surface and a plurality of teeth formed between adjacent slots, the slots extending in the axial direction of the cylindrical core reference surface. The present invention relates to an armature for a rotating electrical machine including a coil wound around a child core.

  In order to increase the space factor of a coil in an armature for a rotating electrical machine, a technique is already known in which a coil is formed by winding a linear conductor (flat wire) having a rectangular cross section around an armature core (for example, , See Patent Document 1 and Patent Document 2 below). When a coil is constituted by such a linear conductor, the coil end is regularly arranged by connecting the connecting portions connecting the conductor side portions arranged in different slots at the axial end face of the armature core. The size of the part can be reduced.

  By the way, although the coil is usually configured by being wound around the armature core for a plurality of turns, all of the transition parts constituting the connection part between different turns are the same as the transition part constituting the coil in the turn. It is generally difficult to configure. Therefore, in order to reduce the size of the coil end portion, it is necessary to appropriately arrange a transition portion having a shape different from the others. With respect to this point, the above-mentioned Patent Document 1 employs a configuration in which two waved partial coils are connected by a separate transition conductor. However, when such a separate member is used, the number of parts increases and the number of connection points between the linear conductors increases, which may lead to an increase in parts costs and manufacturing costs. In addition, it is necessary to form a connection part for connecting a separate crossing conductor part, and the coil end part may be increased in size accordingly.

  On the other hand, in Patent Document 2, it is not necessary to use a separate member for the connection between turns, but as is clear from FIG. Since the coil end conductor portion for crossing (conductor portion to which reference numeral 32A in FIG. 7 is attached) is disposed, the coil end portion may increase in size in the axial direction of the armature core.

JP 2008-113539 A JP 2010-81771 A (FIG. 7 etc.)

  Therefore, it is desired to realize an armature for a rotating electrical machine in which an increase in the size of the coil end portion in the axial direction caused by a joint portion between different turns is suppressed.

  An armature core according to the present invention, wherein a plurality of slots extending in the axial direction of a cylindrical core reference surface are distributed in the circumferential direction of the core reference surface and a plurality of teeth are formed between adjacent slots. And a coil wound around the armature core, wherein the coil is configured by joining a plurality of segment conductors, and each of the segment conductors includes the slot. A linear conductor side portion arranged in the inside, a parallel protrusion portion extending in parallel with the extending direction of the conductor side portion and protruding in the axial direction from the armature core, and the parallel protrusion portion being opposite in the axial direction Extending from the conductor side on the side and projecting in the axial direction from the armature core, inclined in the circumferential direction with respect to the extending direction of the conductor side so as to be gradually separated from the armature core in the axial direction, Said conductor side And a skew projecting portion extending to the parallel projecting portion of the segment conductor to be joined, which is another segment conductor to be joined, and a tip end of the skew projecting portion is the parallel of the segment conductor to be joined. The plurality of segment conductors are layers adjacent to each other in the radial direction, with the radial positions of the plurality of conductor side portions joined to the protrusions and arranged in the slot in the radial direction of the core reference plane. A basic segment conductor provided with the oblique projecting portion joined to the parallel projecting portion of the segment conductor to be joined in which the conductor side portion is disposed, and the conductor side portion in a layer separated by three or more layers in the radial direction The deformed segment conductor including the skew projecting portion joined to the parallel projecting portion of the segment conductor to be joined, and the skew segment included in the deformed segment conductor. The deformed oblique projecting portion which is the projecting portion is connected to the conductor side portion and inclined with respect to the extending direction of the conductor side portion, and the first oblique portion A second skewed portion formed on the distal end side and inclined with respect to the extending direction of the conductor side portion, and the second skewed portion with respect to the first skewed portion, the diameter of the core reference surface An offset bending portion that is offset in the direction and connects the first skew portion and the second skew portion, and the offset bending portion is formed at the same circumferential position as any of the teeth. In addition, the second skew feeding to the same radial position as the skew projecting portion of the basic segment conductor in which the conductor side portion is disposed in a layer radially adjacent to the joining target segment conductor of the deformed segment conductor Formed to offset the part In the point.

According to this characteristic configuration, one turn of the coil can be configured with two adjacent layers in the slot as a unit by joining the basic segment conductors arranged in the layers adjacent to each other in the slot. it can. And in the junction part between each turn comprised as a unit of such two layers, the conductor side part of one segment conductor which comprises the said junction part, and the conductor side part of the other segment conductor are mutually mutually There are cases where three or more layers are arranged apart. According to said characteristic structure, in such a case, the connection between the said turns can be performed appropriately by comprising the junction part between the said turns with a deformed segment conductor.
The deformed segment conductor includes an offset bent portion, and the offset bent portion causes the second skewed portion to be a basic segment conductor in which a conductor side portion is disposed in a layer adjacent to the segment conductor to be joined in the radial direction. It is offset to the same radial position as the skew projecting portion (hereinafter referred to as “basic skew projecting portion”). Therefore, the shape of the tip side region (tip side region) of the deformed skew projecting portion can be the same as the shape of the tip side region of the basic skew projecting portion, and is parallel to the deformed skew projecting portion. It can suppress that the junction part with a protrusion part protrudes on the opposite side to the armature core in an axial direction with respect to the junction part of a basic skew protrusion part and a parallel protrusion part. That is, it is possible to suppress an increase in the size of the coil end portion in the axial direction caused by the joint portion between different turns.
In addition, since the offset bending part which enables suppression of the enlargement in the axial direction of such a coil end part is formed in the same circumferential direction position as either of teeth, an offset bending part interferes with a parallel protrusion part. It can be arranged without any problems.

  Here, it is preferable that a layer adjacent to the joining target segment conductor in the deformed segment conductor in the radial direction is a layer adjacent in the radial direction closer to the conductor side portion of the deformed segment conductor.

  According to this structure, the space which an offset bending part occupies can be restrained small, and the freedom degree regarding arrangement | positioning of a deformed segment conductor can be raised. In particular, when the coil includes a plurality of deformed segment conductors, it is easy to arrange the plurality of deformed segment conductors at desired positions.

  The coil includes a plurality of deformed segment conductors in which the conductor side portions are disposed in the same slot and the deformed oblique projecting portions are disposed at the same circumferential position, and the plurality of deformed segments. The conductor is such that the offset direction in the radial direction by the offset bent portion is the same, and the conductor side portion is located on the offset direction side, the more the offset bent portion is on the conductor side portion side in the circumferential direction. It is preferable to be formed.

  According to this configuration, a plurality of deformed segment conductors arranged at the same circumferential position can be arranged without causing interference with each other.

  Further, the one side of the core reference surface in the radial direction is the first radial direction side, the other side is the second radial direction side, and the conductor side portion is disposed on the first layer set at a predetermined radial position in the slot. The segment conductor is arranged as a first layer segment conductor, and the segment conductor is arranged in the second layer set at a position adjacent to the first layer in the second radial direction side. The second layer segment conductor, the third layer segment conductor, the third layer segment conductor, the third layer segment conductor, the third layer segment conductor disposed on the third layer set in the second radial direction position relative to the second layer The segment conductor in which the conductor side portion is arranged in a fourth layer set at a position adjacent to the second radial direction side with respect to the three layers is a fourth layer segment conductor, and the coil is the first layer Segment conductor and second layer segment conductor A first coil part constituted by the second coil part constituted by the third layer segment conductor and the fourth layer segment conductor, and the first layer segment conductor in the first coil part and the second coil part The second layer segment conductor, and the third layer segment conductor and the fourth layer segment conductor in the second coil portion are the basic segment conductors, and the first layer segment conductor and the first layer segment conductor of the first coil portion Either the first layer segment conductor or the fourth layer segment conductor constituting the joint portion between the coil portions, which is a joint portion of the second coil portion with the fourth layer segment conductor, is the deformed segment conductor. It is preferable that

  According to this configuration, even when four or more conductor side portions are arranged in the radial direction in each slot, an increase in the size of the coil end portion in the axial direction can be suppressed.

  Further, as described above, the coil includes the first coil portion and the second coil portion, and any of the first layer segment conductor and the fourth layer segment conductor constituting the joint portion between the coil portions. In the configuration in which either one is the deformed segment conductor, the joint portion between the coil portions is the first inter-coil portion joint portion, and the deformed segment conductor constituting the first coil portion joint portion is the first. A segment conductor having a deformed connection, and the segment conductor having the conductor side portion arranged on the fifth layer set in the second radial direction position with respect to the fourth layer in the slot is a fifth layer segment conductor. The segment conductor in which the conductor side portion is arranged in the sixth layer set at a position adjacent to the fifth radial direction side with respect to the fifth layer is a sixth layer segment conductor, and the coil The fifth layer segment conductor and the sixth layer segment conductor are further provided with a third coil portion, and the fifth layer segment conductor and the sixth layer segment conductor in the third coil portion include the basic segment. The third layer segment which is a conductor and constitutes a joint portion between the second coil portions which is a joint portion between the third layer segment conductor of the second coil portion and the sixth layer segment conductor of the third coil portion Either one of the conductor and the sixth layer segment conductor is the deformed segment conductor, the deformed segment conductor is a second connection deformed segment conductor, the first connection deformed segment conductor and the second connection deformed segment conductor, The conductor side portions are disposed in the same slot, and the deformed oblique projecting portions are disposed at the same circumferential position. Further, the radial offset directions by the offset bent portions are the same, and the conductor side portion of the first connection variant segment conductor and the second connection variant segment conductor is located on the offset direction side. The connection deformed segment conductor is preferably provided with the offset bend on the side of the conductor side in the circumferential direction with respect to the offset bend of the other connection deformed segment conductor.

  According to this configuration, even when six or more conductor side portions are arranged in the radial direction in each slot, an increase in the size of the coil end portion in the axial direction can be suppressed.

  The coil includes a target basic segment conductor which is the basic segment conductor disposed adjacent to the opposite side of the armature core in the axial direction of the core reference plane with respect to the deformed segment conductor, The segment conductors to be joined with the target basic segment conductors are such that the segment conductors to be joined with the deformed segment conductors and the parallel protrusions are arranged at the same circumferential position, and the target basic segment conductors are joined. The parallel projecting portion of the target segment conductor is defined as a target parallel projecting portion, and the conductor side portion of the target basic segment conductor is circumferential with respect to the slot in which the conductor side portion of the deformed segment conductor is disposed. The target basic segment conductor disposed in the slot adjacent to the opposite side of the target parallel protrusion in the direction; The oblique projecting portion has a tilt angle with respect to the extending direction of the conductor side portion that is closer to the target parallel projecting portion side in the circumferential direction than the offset bent portion provided in the deformed segment conductor than the conductor side portion side. A configuration having a large large inclined portion is preferable.

  According to this configuration, the conductor side portions of the two segment conductors to be joined at the joint portion between the turns are a pair of slots having a longer circumferential separation distance than the joint portion between the segment conductors in the turn. Also when arrange | positioned, it becomes possible to suppress the enlargement in the axial direction of a coil end part. That is, by disposing the target basic segment conductor, which is the basic segment conductor constituting such an inter-turn joint, in a positional relationship with the deformed segment conductor as described above, the deformed oblique projecting portion is caused by the offset bent portion. By effectively using the gap formed by offsetting in the radial direction, the axial position of the tip of the target basic segment conductor can be brought closer to the armature core side. Therefore, it can suppress that the front-end | tip part of an object basic segment conductor protrudes on the opposite side to the armature core in an axial direction with respect to the front-end | tip part of another basic segment conductor.

It is a perspective view showing the whole stator composition concerning the embodiment of the present invention. It is a perspective view which shows the structure of the U-phase coil which concerns on embodiment of this invention. It is the figure which looked at the stator which concerns on embodiment of this invention from the axial first direction side. FIG. 4 is a partially enlarged view of FIG. 3. It is a perspective view which shows the shape of the irregular segment conductor which concerns on embodiment of this invention. It is a perspective view of the junction part vicinity of the deformed skew protrusion part and joining object parallel protrusion part which concern on embodiment of this invention. It is a perspective view of the junction part vicinity of the skew protrusion which concerns on a comparative example, and a joining object parallel protrusion part. It is a schematic diagram which shows the electrical connection state in the 1st series coil part which concerns on embodiment of this invention. FIG. 9 is a partially enlarged view of FIG. 8. It is a schematic diagram which shows the electrical connection state in the 2nd series coil part which concerns on embodiment of this invention. FIG. 11 is a partially enlarged view of FIG. 10. It is a perspective view which shows the structure of the object basic segment conductor which concerns on embodiment of this invention. It is a schematic diagram which shows the electrical connection state in the 1st series coil part which concerns on other embodiment of this invention. FIG. 14 is a partially enlarged view of FIG. 13. It is a schematic diagram which shows the electrical connection state in the 2nd series coil part which concerns on other embodiment of this invention. FIG. 16 is a partially enlarged view of FIG. 15.

  An embodiment of an armature for a rotating electrical machine according to the present invention will be described with reference to the drawings. Here, the case where the armature for a rotating electrical machine according to the present invention is applied to the stator 1 of an inner rotor type rotating electrical machine will be described as an example. As shown in FIG. 1, the stator 1 according to the present embodiment includes a stator core 2 and a coil 3 wound around the stator core 2. The coil 3 is configured by joining a plurality of segment conductors 4. The stator 1 includes a deformed segment conductor 4b (see FIG. 5) as the segment conductor 4 constituting the coil 3, and is characterized by the shape and arrangement of the deformed segment conductor 4b. In the present embodiment, the stator 1 and the stator core 2 correspond to the “armature for rotating electrical machine” and the “armature core” in the present invention, respectively. Hereinafter, the configuration of the stator 1 according to the present embodiment will be described in detail.

  In the following description, unless otherwise specified, “axial direction L”, “circumferential direction C”, and “radial direction R” are defined with reference to the axial center of a cylindrical core reference surface 21 described later. . Further, in the following description, “first axial direction L1” represents the upper side along the axial direction L in FIG. 1, and “second axial direction L2” represents the lower side along the axial direction L in FIG. To do. Further, in the following description, as shown in FIG. 1, the “circumferential first direction C1” indicates that the stator 1 is viewed from the first axial direction L1 side (from the first axial direction L1 side to the second axial direction L2 side). The “counter-second direction C2” represents a clockwise direction when the stator 1 is viewed from the first axial direction L1 side. The “inner diameter direction R1” represents a direction toward the inner side of the radial direction R of the core reference surface 21, and the “outer diameter direction R2” represents a direction toward the outer side of the radial direction R of the core reference surface 21. In the present embodiment, the radially inner direction R1 and the radially outer direction R2 correspond to the “diameter second direction” and the “diameter first direction” in the present invention, respectively. In the following description, the directions of the coil 3 and the segment conductor 4 are defined as directions in a state in which these are attached to the stator core 2.

1. Overall Configuration of Stator The overall configuration of the stator 1 according to this embodiment will be described with reference to FIG. As shown in FIG. 1, the stator 1 includes a stator core 2 and a coil 3 and is configured as an armature for a rotating electrical machine. In this specification, “rotary electric machine” is used as a concept including a motor (electric motor), a generator (generator), and a motor / generator that performs both functions of the motor and the generator as necessary. Yes.

  The stator core 2 is formed of a magnetic material, and a plurality of slots 22 extending in the axial direction L of the cylindrical core reference surface 21 are provided in the circumferential direction C of the core reference surface 21 so that the coil 3 can be wound. The stator cores 2 are formed in a distributed manner (48 in this example). Here, the “cylindrical core reference surface 21” is a virtual surface serving as a reference for the arrangement and configuration of the slots 22. In the present embodiment, as shown in FIG. 1, the core inner peripheral surface which is a virtual cylindrical surface including the end surface on the radially inner direction R1 side of the tooth 23 positioned between the slots 22 adjacent to each other in the circumferential direction C. This cylindrical inner peripheral surface can be used as the “cylindrical core reference surface 21” in the present invention. Moreover, it is concentric with the cylindrical inner peripheral surface, and the cross-sectional shape in the axial direction L (when viewed along the axial direction L) is similar to the cross-sectional shape in the axial direction L of the core inner peripheral surface. Cylindrical surfaces (including virtual surfaces) in relation can also be the “cylindrical core reference surface 21” in the present invention. For example, the outer peripheral surface of the stator core 2 excluding the mounting protrusions 25 described later can be used as the “cylindrical core reference surface 21”.

  The stator core 2 has a plurality of slots 22 distributed in the circumferential direction C with respect to the core body. The plurality of slots 22 are arranged at predetermined circumferential intervals, and are provided so as to extend at least in the axial direction L. In the present embodiment, the slot 22 is formed in a groove shape extending in the axial direction L and the radial direction R and having a constant width in the circumferential direction C. Each slot 22 is formed so as to open on the radial inner side R1 side (open on the inner peripheral surface of the core) and open on both sides of the stator core 2 in the axial direction L (both axial end surfaces). As described above, the stator core 2 is formed with the plurality of slots 22 extending radially in the radial direction R from the axis of the stator core 2. Further, the plurality of slots 22 have the same shape. In addition, the circumferential direction protrusion part which protrudes in the circumferential direction C is formed in the front-end | tip part of each tooth | gear 23, and, thereby, the opening part by the side of radial inner side R1 of each slot 22 is further on the radial direction R2 side from it The width in the circumferential direction C is narrower than the portion. In the present embodiment, mounting protrusions 25 for mounting to a case or the like are provided at a plurality of locations in the circumferential direction C on the outer peripheral surface of the stator core 2. The mounting protrusion 25 is a protruding ridge formed to protrude in the radially outward direction R2 with respect to the other part of the outer peripheral surface of the stator core 2 and to extend in the axial direction L. An attachment hole 26 penetrating in the axial direction L is formed in the attachment protrusion 25.

  In the present embodiment, the stator 1 is a stator used in a rotating electrical machine driven by three-phase alternating current (U phase, V phase, W phase). Therefore, the U-phase, V-phase, and W-phase slots 22 are arranged in the stator core 2 so as to repeatedly appear along the circumferential direction C. In this example, as shown in FIG. 3, the stator core 2 has two slots 22 adjacent to each other for the U phase and two for the V phase so that the number of slots per pole per phase is “2”. Two slots 22 adjacent to each other and two slots 22 adjacent to each other for the W phase are formed so as to repeatedly appear in the circumferential direction C in the order described. The coil 3 is also divided into three phases (U phase, V phase, W phase). That is, as shown in FIG. 1, the coil 3 includes a U-phase coil 3u, a V-phase coil 3v, and a W-phase coil 3w. In the following description, the configuration of the U-phase coil 3u will be mainly described. However, in this embodiment, the phase coils of each phase included in the coil 3 have the same configuration, and thus the V-phase coil 3v and the W-phase coil 3w. The detailed description about is omitted. In the present embodiment, the coil 3 is wound around the stator core 2 by wave winding. As will be described in detail later, the coil 3 is formed by joining a plurality of segment conductors 4.

  Although not shown in the drawings, a rotor as a field magnet including a permanent magnet or an electromagnet is disposed on the inner radial direction R1 side of the stator 1 (stator core 2) so as to be rotatable relative to the stator 1. Then, the rotor is rotated by the rotating magnetic field generated from the stator 1. That is, the stator 1 according to the present embodiment is a stator that is an armature for an inner rotor type and rotating field type rotating electrical machine.

  The stator core 2 as described above is, for example, a laminated structure in which a plurality of annular plate-shaped electromagnetic steel plates are laminated, or magnetic material powder (a powder material formed by pressing a magnetic material). It can be formed as the main component. Further, in the present embodiment, the stator core 2 is formed with a plurality of slots 22 so that the number of slots per phase per pole is “2”. Of course, the number of slots per phase per pole is It can be changed as appropriate. For example, the number of slots per pole per phase can be set to “1”, “3”, or the like. Further, the number of phases of the AC power source for driving the rotating electrical machine can be changed as appropriate, and can be set to, for example, “1”, “2”, “4”, and the like.

2. Next, each of the plurality of segment conductors 4 constituting the coil 3 will be described. The segment conductor 4 is a conductor that corresponds to the coil 3 of each phase divided into a plurality of parts, and the coil 3 that goes around the stator core 2 is configured by joining the ends of the plurality of segment conductors 4 to each other. . In the present embodiment, as shown in FIGS. 1 to 4, the segment conductor 4 has a rectangular cross section perpendicular to the extending direction (equal to the energizing direction), more specifically a rectangular shape with corners arcuate. It is composed of a linear conductor having a shape. Further, the segment conductor 4 basically has the same cross-sectional shape regardless of the position in the extending direction, except for bent portions 73, 74, 76, 77 described later. The material constituting this linear conductor can be, for example, copper or aluminum. Further, the surface of the linear conductor is covered with an insulating film made of resin or the like (for example, polyimide or the like) except for a part of the joint 72 or the like that is a part for electrically connecting to the different segment conductors 4. Yes.

  In the present embodiment, the coil 3 includes a basic segment conductor 4a and a deformed segment conductor 4b. That is, the plurality of segment conductors 4 constituting the coil 3 include a basic segment conductor 4a and a deformed segment conductor 4b. Although details will be described later, the odd-shaped segment conductor 4b basically has the same shape as the basic segment conductor 4a. Most of the coil 3 is constituted by the basic segment conductor 4a, but the deformed segment conductor 4b is used in a specific part of the coil 3 (joint portion between turns in this example). Hereinafter, the configurations of the basic segment conductor 4a and the deformed segment conductor 4b will be described in detail in order. In the following description, the other segment conductors 4 that are joined to the target segment conductor 4 are referred to as “joining target segment conductors”. In the present specification, the basic segment conductor 4a and the deformed segment conductor 4b may be collectively referred to as the segment conductor 4 when it is not necessary to distinguish between the basic segment conductor 4a and the deformed segment conductor 4b.

2-1. Configuration of Basic Segment Conductor The configuration of the basic segment conductor 4a will be described with reference to FIGS. FIG. 1 is a diagram showing a state in which all the segment conductors 4 constituting the coil 3 are wound around the stator core 2. FIG. 2 is a diagram showing only the U-phase coil 3 u among the phase coils of each phase included in the coil 3. 3 and 4 also show only the U-phase coil 3u. In FIG. 1, only a part of the basic segment conductors 4a is highlighted, and a part of the part of the basic segment conductors 4a hidden by the stator core 2 and the other segment conductors 4 is indicated by a broken line. Show. Moreover, in FIG. 2 to FIG. 4, the segment conductor 4 constituting the first series coil portion 1Y described later is emphasized.

  As shown in FIG. 1, the coil 3 includes a plurality of basic segment conductors 4a. Each basic segment conductor 4a includes a linear conductor side 5 disposed in the slot 22 and a pair of protrusions (parallel projections described below) extending from the conductor side 5 and protruding in the axial direction L from the stator core 2. Part 6 and a basic oblique projecting part 7a).

  The conductor side portion 5 is a portion of the basic segment conductor 4 a inserted into the slot 22 of the stator core 2, and has a shape that matches the shape of the slot 22. Here, as shown in FIGS. 1 and 2, the conductor side portion 5 is formed in a linear shape extending in parallel with the axial direction L. And the conductor side part 5 is arrange | positioned in the slot 22 in the direction in which the short side in the rectangular cross section orthogonal to the extension direction of a linear conductor becomes parallel to the radial direction R, and a long side is parallel to the circumferential direction C. . Further, as will be described later, in each slot 22, a plurality of conductor side portions 5, in this embodiment, six conductor side portions 5 are overlapped in the radial direction R so as to be aligned at the same circumferential direction C. Arranged in a row. In the present specification, each radial R position of the plurality of conductor side portions 5 arranged in the radial direction R of the core reference surface 21 in the slot 22 is represented by a layer. Specifically, with respect to the position of the conductor side 5 in each slot 22, the position closest to the radially outward direction R 2 is defined as the first layer, and then the second layer and the third layer in that order toward the radially inward direction R 1.・ ・ ・ ・ ・ ・ Sixth layer.

  The parallel projecting portion 6 is a projecting portion that extends in parallel with the extending direction (axial direction L) of the conductor side portion 5 and projects from the stator core 2 in the axial direction L. In this example, the parallel protrusion 6 is formed at the same position in the circumferential direction C as the conductor side 5. Specifically, the parallel protrusion 6 is formed in a straight line arranged on the extension line of the conductor side part 5, that is, in the same straight line as the conductor side part 5, and in both the circumferential direction C and the radial direction R. It is arranged at the same position as the conductor side 5. Accordingly, the parallel projecting portion 6 is formed without performing bending or the like on the conductor side portion 5. In addition, by providing a bent portion between the parallel protruding portion 6 and the conductor side portion 5, the parallel protruding portion 6 is disposed at a position different from the conductor side portion 5 in at least one of the circumferential direction C and the radial direction R. You can also. And the part which is the front end side area | region (area | region on the opposite side to the conductor side part 5) of the parallel protrusion part 6 and contact | connects the junction part 72 of the basic skew protrusion part 7a mentioned later is a junction part of the parallel protrusion part 6 It is said. Hereinafter, the parallel projecting portions 6 of the joining target segment conductors are referred to as “joining target parallel projecting portions”.

  The basic oblique projecting portion 7a extends from the conductor side portion 5 on the opposite side to the parallel projecting portion 6 in the axial direction L, projects from the stator core 2 in the axial direction L, and gradually separates from the stator core 2 in the axial direction L. It is formed so as to incline in the circumferential direction C with respect to the extending direction of the part 5 and extend from the conductor side part 5 to the parallel projecting part 6 of the segment conductor to be joined. Here, the basic oblique projecting portion 7a is formed on the conductor side portion 5 so as to be directed to one side in the circumferential direction C (one side in the circumferential direction C) of the core reference surface 21 as it is separated from the stator core 2 in the axial direction L. It is formed to extend in a direction inclined with respect to the extending direction. In the present embodiment, all the basic oblique projecting portions 7 are formed so as to extend toward the same side in the circumferential direction C, specifically toward the circumferential first direction C1 side as they move away from the stator core 2 in the axial direction L. Yes. And the front-end | tip part 78 (end part on the opposite side to the conductor side part 5) of the basic skew protrusion part 7a is joined to the parallel protrusion part 6 of the other segment conductor 4 (joining object segment conductor) used as joining object. The For this reason, the front-end | tip part 78 of the basic skew protrusion part 7a is arrange | positioned in the position which contact | connects a joining object parallel protrusion part, and is made into the junction part 72 joined to the said joining object parallel protrusion part.

  The basic skew projecting portion 7a will be described in more detail. The basic skew projecting portion 7a includes a first bent portion 73, a second bent portion 74, and a first offset bent portion 76. The first bent portion 73 is a bent portion that bends the basic skew projecting portion 7 a so as to extend in a direction inclined in the circumferential direction C with respect to the extending direction of the conductor side portion 5. Here, when a portion of the basic skew projecting portion 7a closer to the conductor side portion 5 than the first bent portion 73 (a boundary portion between the basic skew projecting portion 7a and the conductor side portion 5) is a base end portion 75, the base end The part 75 is disposed at the same position as the conductor side part 5 in both the radial direction R and the circumferential direction C. That is, the base end portion 75 is formed in a straight line arranged on the extension line of the conductor side part 5, that is, in the same straight line as the conductor side part 5. In addition, by providing a bent part between the base end part 75 and the conductor side part 5, the base end part 75 is arranged at a position different from the conductor side part 5 in at least one of the circumferential direction C and the radial direction R. You can also.

  The second bent portion 74 is a direction in which the front end portion 78 of the basic skew projecting portion 7a is inclined with respect to the main body portion 71 when viewed in the radial direction R, and is the parallel projecting portion 6 of the segment conductor to be joined. It is a bent part for forming the joint 72 of the basic oblique projecting part 7a by bending so as to extend in a direction parallel to the parallel projecting part. Here, the main body portion 71 is a portion that constitutes a portion between the first bent portion 73 and the second bent portion 74 in the basic skew projecting portion 7a.

  The first offset bent portion 76 has a diameter of the joint portion 72 (tip portion 78) with respect to the main body portion 71 (base end portion 75) so that the joint portion 72 is positioned in the same radial direction R as the parallel projection portion to be joined. This is a bent portion that is offset in the direction R. The basic segment conductor 4a is a segment conductor 4 joined to the segment conductor 4 (joining target segment conductor) in which the conductor side portion 5 is arranged in a layer adjacent to the basic segment conductor 4a in the radial direction R. The basic oblique projecting portion 7a included in the basic segment conductor 4a is joined to the parallel projecting portion 6 of the joining target segment conductor in which the conductor side portion 5 is arranged in a layer adjacent to the basic segment conductor 4a. Therefore, the amount of offset with respect to the main body portion 71 (base end portion 75) of the joint portion 72 by the first offset bent portion 76 is the thickness (one layer) in the radial direction R of the linear conductor. The direction is the parallel projection portion side to be joined in the radial direction R.

  In the present embodiment, the first offset bent portion 76 is provided so as to overlap the second bent portion 74. The length in the circumferential direction C where the first offset bent portion 76 is provided is as short as 1 slot pitch or less. Therefore, the first offset bent portion 76 bends the portion extending along the extending direction of the main body portion 71 in the radial direction R toward the joining target parallel projecting portion, and then makes the joint portion 72 parallel to the axial direction L. In the second bent portion 74 that is bent in the direction along the axial direction L so as to extend, at the same time, the direction of the outer peripheral surface of the joint portion 72 is made parallel to the direction of the outer peripheral surface of the parallel projecting portion to be joined. It has a shape that bends. It is also possible to form the first offset bent portion 76 at a position different from the second bent portion 74 (for example, the tip 78 side of the second bent portion 74). In this case, the first offset bent portion 76 can be a crank-like bent portion when viewed in the circumferential direction C.

  And by providing such a 1st offset bending part 76, as shown in FIG.1 and FIG.2, the joining part 72 is located in a line with the parallel protrusion part to be joined in the circumferential direction C, and the parallel protrusion part to be joined. It arrange | positions so that it may contact | connect from the base end part 75 side in the circumferential direction C with respect to it.

  By the way, the main body 71 is formed in a linear shape extending in a direction inclined in the circumferential direction with respect to the extending direction of the conductor side 5 when viewed in the radial direction R. The inclination angle in the extending direction of the main body portion 71 is determined according to the bending angle of the first bent portion 73 and extends to the side away from the stator core 2 in parallel with the extending direction of the conductor side portion 5 (axial direction L). The direction is preferably set to an angle of 45 ° or more and less than 90 °, more preferably an angle of 60 ° or more and less than 90 °, with reference to the direction (0 °). Furthermore, the largest angle within a range that does not interfere with the first bent portion 73 and the main body portion 71 of the adjacent same-layer segment conductor with respect to the basic segment conductor 4a of interest here, that is, in a direction parallel to the axial end surface of the stator core 2. It is preferable to set the closest angle. Here, the adjacent same-layer segment conductor is another segment conductor 4 in which the conductor side portion 5 is disposed at the same radial direction R position in the adjacent slot 22 with respect to the target basic segment conductor 4a. . If comprised in this way, the height of the axial direction L of the coil end part which is a protrusion part of the coil 3 which protrudes from the steer core 2 to the axial direction L can be suppressed to the minimum.

  Further, the extending length in the circumferential direction C of the main body 71 is set in consideration of the shape of the first offset bent portion 76. In this embodiment, as shown in FIG. 1, the joint 72 of the basic segment conductor 4a basically has a circumferential direction C (here, the slot 22 in which the conductor side portion 5 of the basic segment conductor 4a is disposed. Then, it joins to the parallel protrusion part to be joined arranged in the slot 22 separated by 6 slot pitches in the circumferential first direction C1). That is, the conductor side portion 5 and the base end portion 75 of each basic segment conductor 4a and the joint portion 72 are arranged in the circumferential direction C with an interval of about 6 slot pitches. Accordingly, the extending length in the circumferential direction C of the portion extending from the base end portion 75 including the main body portion 71 and the first offset bent portion 76 to the joint portion 72 is set to about 6 slot pitches. Further, as shown in FIG. 4, the first offset bent portion 76 and the joint portion 72 are arranged at a pitch of about 1 slot between the parallel projection portion to be joined in the circumferential direction C and the parallel projection portion 6 in front thereof. Has been. Accordingly, the extending length of the main body 71 in the circumferential direction C is set to about 5 slot pitches. Thereby, the basic oblique projecting portion 7a is formed to extend from the conductor side portion 5 to the parallel projecting portion 6 of the joining target segment conductor. Here, the extending length of each part in the circumferential direction C is the length in the circumferential direction C when projected onto a plane orthogonal to the axial direction L.

  Furthermore, in this embodiment, as shown in FIG. 3, the main body 71 is formed in an arc shape parallel to the core reference surface 21 when viewed in the axial direction L. That is, the main body 71 has a shape that inclines away from the stator core 2 in the axial direction L and curves along the core reference plane 21 as it goes from the conductor side 5 to the joint 72. . As a result, the main body 71 extends to the core reference surface 21 so as to extend in the circumferential direction C through the same radial position R (same layer in the slot 22) as the conductor side 5 of the segment conductor 4. Arranged along parallel cylindrical surfaces. Therefore, the main body 71 is arranged without interfering with the parallel protrusions 6 of the other segment conductors 4 existing on both sides of the radial direction R. That is, in this embodiment, as shown in FIG. 1, the main body portion 71 of each segment conductor 4 has a pitch of about 5 slots in the circumferential direction C from the base end portion 75 to the first offset bent portion 76. It is formed to move by minutes. The main body 71 has a circumferential direction C in which both sides of the outer radial direction R2 side and the inner radial direction R1 side are sandwiched by the parallel projecting portions 6 of the other segment conductors 4 inserted into the slots 22 therebetween. Arranged to extend. The parallel projecting portions 6 of the other segment conductors 4 sandwiching the main body 71 are arranged along an arc parallel to the core reference surface 21 in accordance with the shape of the slot 22. Therefore, each basic segment conductor 4a can be arrange | positioned, without interfering with the parallel protrusion part 6 of the other segment conductor 4, by making the main-body part 71 into the above shapes.

  The shape of each basic segment conductor 4a has been described above. By the way, the shape of the plurality of basic segment conductors 4 a wound around the stator core 2 is slightly different depending on the position in the radial direction R with respect to the stator core 2. That is, the plurality of slots 22 are provided so that the interval in the circumferential direction C increases radially from the axial center of the stator core 2 toward the radially outward direction R2. As described above, the basic oblique projecting portion 7a is formed so as to extend from the conductor side portion 5 to the parallel projecting portion 6 of the segment conductor to be joined, and thus is joined to the conductor side portion 5 of each basic segment conductor 4a. The part 72 is formed by being separated in the circumferential direction C by a predetermined slot pitch (basically about 6 slot pitch). Accordingly, the extending length in the circumferential direction C of the main body portion 71 and the first offset bent portion 76 is set according to the distance in the circumferential direction C between the conductor side portion 5 and the joint portion 72, The extension length becomes longer as the arrangement with respect to the stator core 2 is directed toward the radially outward direction R2.

2-2. Next, the configuration of the deformed segment conductor 4b will be described. The deformed segment conductor 4b basically has the same configuration as the basic segment conductor 4a. However, unlike the basic segment conductor 4a, the deformed segment conductor 4b is a layer separated by three or more layers in the radial direction R from the deformed segment conductor 4b. It is the segment conductor 4 joined to the segment conductor 4 (joining object segment conductor) in which the conductor side part 5 is arranged. Therefore, unlike the basic skew projecting portion 7a, the skew projecting portion 7 (the deformed skew projecting portion 7b) included in the deformed segment conductor 4b has a bent portion (second offset bend) as shown in FIG. Part 77) is formed. That is, the basic segment conductor 4a and the deformed segment conductor 4b are different in the configuration of the skew projecting portion 7. Below, it demonstrates centering around the structure peculiar to the irregular-shaped segment conductor 4b (the irregular-shaped skew protrusion part 7b). Note that points that are not particularly described are the same as those of the basic segment conductor 4a (basic oblique projecting portion 7a). In the present specification, when there is no particular need to distinguish between the basic oblique projecting portion 7a and the deformed oblique projecting portion 7b, these may be collectively referred to as the oblique projecting portion 7. In the present embodiment, the second offset bent portion 77 corresponds to the “offset bent portion” in the present invention.

  As shown in FIG. 5, the odd-shaped segment conductor 4 b has the same configuration as the basic segment conductor 4 a (see FIG. 1) except that the main body portion 71 includes a second offset bent portion 77. Here, the distal end 78 side of the second offset bent portion 77 of the main body portion 71 is defined as the distal end side main body portion 71a, and the proximal end portion 75 side (conductor side portion 5 side) of the second offset bent portion 77 of the main body portion 71 is defined. If it is set as the base end side main-body part 71b, the 2nd offset bending part 77 offsets the front end side main-body part 71a in radial direction R with respect to the base end side main-body part 71b. In other words, the deformed oblique projecting portion 7b is connected to the conductor side portion 5 and is inclined with respect to the extending direction of the conductor side portion 5 and the base end side main body portion 71b. A distal end side main body portion 71a formed on the distal end portion 78 side and inclined with respect to the extending direction of the conductor side portion 5, and the distal end side main body portion 71a are offset in the radial direction R with respect to the proximal end side main body portion 71b. And a second offset bent portion 77 for connecting the proximal end main body portion 71b and the distal end side main body portion 71a. The base end side main body 71 b is connected to the conductor side 5 via the first bent portion 73 and the base end 75. In the present embodiment, the distal end side main body portion 71a and the proximal end side main body portion 71b correspond to the “second skew portion” and the “first skew portion” in the present invention, respectively.

  As described above, the deformed segment conductor 4b is a segment conductor 4 that is joined to the joining target segment conductor in which the conductor side portions 5 are arranged in a layer separated by three or more layers in the radial direction R with respect to the deformed segment conductor 4b. The deformed oblique projecting portion 7b included in the deformed segment conductor 4b is a joining target of the segment conductor to be joined in which the conductor side portions 5 are arranged in a layer separated from the deformed segment conductor 4b by three or more layers in the radial direction R. Joined to parallel protrusions. Therefore, the second offset bent portion 77 has a radial direction R such that the radial direction R position of the distal end side region (front end side main body portion 71a) is adjacent to the radial direction R position of the bonding target main body protruding portion. The amount of offset is set.

  Specifically, as shown in FIG. 3 and FIG. 4, the second offset bent portion 77 has the conductor side portion 5 arranged in a layer adjacent to the segment conductor to be joined with respect to the deformed segment conductor 4 b in the radial direction R. Further, the distal end side region (the distal end side main body portion 71a) is offset to the same radial direction R position as the basic oblique projecting portion 7a of the basic segment conductor 4a. In other words, the second offset bent portion 77 is the basic oblique projecting portion 7a of the basic segment conductor 4a in which the conductor side portion 5 is disposed in a layer adjacent to the segment conductor to be joined with respect to the deformed segment conductor 4b in the radial direction R. The tip side region (tip side main body 71a) is offset to a position overlapping with the axial direction L. Here, in this example, the layer segment adjacent to the joining segment conductor and the radial direction R of the deformed segment conductor 4b is a layer adjacent to the radial direction R on the side close to the conductor side 5 of the deformed segment conductor 4b. ing. Therefore, the amount of offset of the distal end side main body portion 71a with respect to the base end side main body portion 71b by the second offset bent portion 77 is between the conductor side portion 5 of the deformed segment conductor 4b and the conductor side portion 5 of the segment conductor to be joined. The difference of the radial direction R position is a value obtained by subtracting the thickness (one layer) of the linear conductor in the radial direction R, and the offset direction is on the parallel projection portion side in the radial direction R.

  In this embodiment, as shown in FIG. 4, the deformed segment conductor 4b is a segment conductor to be joined in which the conductor side portion 5 is arranged in a layer three layers away from the deformed segment conductor 4b in the radial direction R. And a segment conductor 4 to be joined. Therefore, in this example, the amount of offset of the second offset bent portion 77 is set to twice the thickness of the linear conductor in the radial direction R (two layers).

  In the present embodiment, the second offset bent portion 77 is a crank-like bent portion as viewed in the axial direction L, and as shown in FIG. 2, the distal end side main body portion 71a and the proximal end side main body portion 71b. Are connected in a straight line when viewed in the radial direction R, and the distal end side body 71a and the proximal side body 71b are connected. Therefore, as shown in FIGS. 2 and 6, the inclination angle in the extending direction of the distal end side main body 71a is equal to the inclination angle in the extending direction of the proximal end main body 71b.

  By providing such a second offset bent portion 77, the height in the axial direction L of the coil end portion, which is the protruding portion of the coil 3 protruding from the stator core 2 in the axial direction L, is provided with the deformed segment conductor 4b. The increase is suppressed. Hereinafter, this point will be described. FIG. 6 is a perspective view of the vicinity of the joint between the deformed oblique projecting portion 7b and the parallel projecting portion to be joined. As can be seen from FIGS. 4 and 6, the base-end-side main body portion 71 b located on the base end portion 75 side of the second offset bent portion 77 is separated from the parallel projecting portion to be joined by three layers in the radial direction R. The distal end side main body portion 71 a closer to the distal end portion 78 than the second offset bent portion 77 is disposed adjacent to the parallel projecting portion to be joined in the radial direction R. Therefore, the first offset bent portion 76 and the second bent portion 74 included in the deformed segment conductor 4b can adopt the same configuration as the first offset bent portion 76 and the second bent portion 74 included in the basic segment conductor 4a. The joint portion between the irregularly skewed portion 7b and the parallel projection portion to be joined projects to the opposite side of the stator core 2 in the axial direction L with respect to the joint portion between the basic skew portion 7a and the parallel projection portion to be joined. Is easily suppressed. In this example, as shown in FIG.1 and FIG.2, the axial direction L position of the junction part of the deformed slant part 7b and the parallel projection part to be joined is the junction between the basic slant part 7a and the parallel projection part to be joined. It is equal to the position in the axial direction L of the part.

  On the other hand, FIG. 7 is a diagram showing a comparative example corresponding to FIG. 6, and when the deformed skew projecting portion 7 b does not include the second offset bent portion 77, the deformed skew projecting portion 7 b and the parallel projecting portion to be joined. FIG. 7 is not related to the embodiment of the present invention. In FIG. 7, the same reference numerals as those in FIG. 6 are given, and the description related to FIG. 7 in this paragraph is the same as the configuration according to the present embodiment. This will be described using reference numerals. Further, in FIG. 7, in order to facilitate comparison with FIG. 6, the portions other than the deformed oblique projecting portion 7 b of interest here are the same as those in FIG. 6. As shown in FIG. 7, when the deformed skew projecting portion 7 b does not include the second offset bent portion 77, it is arranged on the parallel projecting portion to be joined and the deformed skew projecting portion 7 b side in the circumferential direction C. Three times the thickness of the linear conductor in the radial direction R by the first offset bent portion 76 and the second bent portion 74 at a pitch of about 1 slot between the parallel protruding portions (not shown). (For three layers), the joining portion 72 (tip portion 78) is offset in the radial direction R with respect to the base end portion 75, and the extending direction of the leading end portion 78 is parallel to the extending direction of the parallel projecting portion to be joined. Need to be direction. Therefore, the length of the linear conductor required to form the first offset bent portion 76 and the second bent portion 74 is increased, and accordingly, as shown in FIG. The height in the axial direction L of the distal end portion 78 (joint portion 72) is likely to increase. On the other hand, according to the present invention, as shown in FIG. 6, the joint portion between the irregularly skewed portion 7 b and the parallel projection portion to be joined becomes the joint portion between the basic skew portion 7 a and the parallel projection portion to be joined. On the other hand, it becomes easy to suppress projecting to the opposite side to the stator core 2 in the axial direction L.

  As shown in FIG. 4, the distal end side main body portion 71 a and the proximal end side main body portion 71 b are formed in an arc shape parallel to the core reference surface 21 at different radial direction R positions when viewed in the axial direction L. ing. And the 2nd offset bending part 77 which connects these front end side main-body parts 71a and base end side main-body parts 71b is formed in the same circumferential direction C position as either of the some teeth 23 with which the stator core 2 is provided. In other words, the second offset bent portion 77 and the deformed oblique projecting portion 7b are disposed without interfering with the parallel projecting portion 6 disposed to project from the slot 22 in the axial direction L. In addition, as described above, the second offset bent portion 77 has the distal end side main body portion 71a and the proximal end so that the distal end side main body portion 71a and the proximal end side main body portion 71b are straight when viewed in the radial direction R. The side main body 71b is connected. Therefore, as shown in FIG. 6, the tip-side main body 71a offset in the radial direction R by the second offset bent portion 77 is a skew projecting portion 7 (basic) disposed in the radial direction R position after the offset. Arranged without interfering with the oblique projection 7a).

  The coil 3 includes at least one such deformed segment conductor 4b. In this example, each of the phase coils 3u, 3v, and 3w of each phase includes a plurality (specifically, four) deformed segment conductors 4b.

3. Next, the configuration of the coil 3 according to this embodiment will be described in detail. As shown in FIG. 1, the coil 3 is configured by joining a plurality of segment conductors 4 having the above-described shape. In the present embodiment, the plurality of segment conductors 4 are sequentially joined so that the coil 3 is wound around the stator core 2 by wave winding. The coil 3 is wound around the stator core 2 by arranging the conductor side portions 5 of the plurality of segment conductors 4 constituting the coil 3 in the plurality of slots 22 formed in the stator core 2.

  Each slot 22 has an n-layer winding structure in which n conductor side portions 5 of each segment conductor 4 are arranged in the radial direction R. Here, n is an integer greater than or equal to 2 (particularly an even number is desirable), and is set according to the torque required for the rotating electrical machine, the allowable back electromotive force, and the like. In this embodiment, the coil 3 has a six-layer structure, and six conductor side portions 5 are overlapped in the radial direction R so as to be aligned in the same circumferential direction C in each slot 22. Arranged in a row. In the present embodiment, with respect to the position of the conductor side 5 in each slot 22, the position closest to the radially outward direction R2 is defined as the first layer, and then the second layer, Three layers ... 6th layer. That is, the second layer is set at a position adjacent to the first layer on the radial direction R1 side. The third layer is set at a position on the inner radial direction R1 side with respect to the second layer (in this example, a position adjacent to the inner radial direction R1 side). The fourth layer is set at a position adjacent to the third layer on the radial direction R1 side. The fifth layer is set at a position on the radial direction R1 side with respect to the fourth layer (in this example, a position adjacent to the radial direction R1 side). The sixth layer is set at a position adjacent to the fifth layer in the radial direction R1 side.

  Further, the segment conductor 4 in which the conductor side portion 5 is disposed in the first layer in the slot 22 is the first layer segment conductor 41, and the segment conductor 4 in which the conductor side portion 5 is disposed in the second layer is the second layer segment conductor. 42, the segment conductor 4 in which the conductor side 5 is arranged in the third layer is the third layer segment conductor 43, the segment conductor 4 in which the conductor side 5 is arranged in the fourth layer is the fourth layer segment conductor 44, the fifth The segment conductor 4 in which the conductor side 5 is disposed in the layer is referred to as a fifth layer segment conductor 45, and the segment conductor 4 in which the conductor side 5 is disposed in the sixth layer is referred to as a sixth layer segment conductor 46.

  By the way, as described above, the stator core 2 includes two adjacent slots 22 for the U phase, two adjacent slots 22 for the V phase, and two adjacent slots 22 for the W phase. Are repeatedly formed in the order of description along the circumferential direction C. In accordance with such an arrangement configuration of the slots 22, in the present embodiment, as shown in FIG. 1, each segment conductor 4 basically has a relationship with respect to the slot 22 in which the conductor side portion 5 of the segment conductor 4 is arranged. Thus, the segment conductor 4 in which the conductor side portions 5 are arranged in the slots 22 separated by a pitch of 6 slots in the circumferential direction C (here, the circumferential first direction C1) is used as a segment conductor to be joined. In other words, the conductor side 5 of each segment conductor 4 and the conductor side 5 of the segment conductor to be joined joined to the segment conductor 4 are circumferentially separated by a distance corresponding to one magnetic pole pitch (electrical angle π). They are arranged in a pair of slots 22 separated by C. In addition, in the junction part between turns, the conductor side part 5 of the segment conductor 4 made into object, and the conductor side part 5 of the segment conductor 4 to be joined of the segment conductor 4 mutually correspond to 5 slot pitch or 7 slot pitch. It may be placed in a remote slot 22.

  In this embodiment, the conductor side portions 5 are arranged in the slots 22 separated from each other by 6 slot pitches (one magnetic pole pitch), and the odd-numbered layer segment conductors and even-numbered layer segment conductors of the adjacent layers are alternately joined. Thus, the coil 3 for one turn (one turn of the stator core) is formed. The odd layer segment conductor includes a first layer segment conductor 41, a third layer segment conductor 43, and a fifth layer segment conductor 45, and the even layer segment conductor includes a second layer segment conductor 42, a fourth layer segment conductor. A segment conductor 44 and a sixth layer segment conductor 46 are included. As shown in FIGS. 1 and 2, for example, the conductor side portions 5 are arranged in the slots 22 separated from each other by 6 slot pitches, and a plurality of first layer segment conductors 41 and second layer segment conductors 42 are joined to each other. As a result, the coil 3 for one turn is formed. In the present embodiment, since 48 slots 22 are formed in the stator core 2, the four first layer segment conductors 41 and the four second layer segment conductors 42 make a round in the circumferential direction C around the stator core 2. By alternately joining in this way, the coil 3 for one turn that makes one round (one round) of the stator core 2 is formed.

  In the present embodiment, since two slots 22 for each phase (each of U phase, V phase, and W phase) are arranged adjacent to each other as described above, two adjacent slots for each of these phases are provided. One turn of the coil 3 is formed for each of the slot 22 and two adjacent layers in each slot 22. Therefore, in the stator 1 as a whole, the first layer segment conductor 41 and the second layer segment conductor 42 form the coil 3 for four turns for each phase and a total of 12 turns for three phases. The same applies to the other layers. For each of the set of the third layer segment conductor 43 and the fourth layer segment conductor 44 and the set of the fifth layer segment conductor 45 and the sixth layer segment conductor 46, Coil 3 for 4 turns is formed per phase. The coils 3 constituting each turn are basically the same shape although the diameter of the arranged layers is reduced as a whole in the radially inward direction R1 side. Become. Further, the coils 3 constituting each turn of each phase are divided and arranged in two adjacent slots 22 with a positional relationship shifted by one slot pitch. That is, in this embodiment, the coil 3 is wound around the stator core 2 with distributed winding.

  As described above, the phase coils of each phase include the first layer segment conductor 41, the second layer segment conductor 42, the third layer segment conductor 43, the fourth layer segment conductor 44, the fifth layer segment conductor 45, and the sixth layer segment conductor 43. The layer segment conductor 46 includes a coil portion for 12 turns. And in this embodiment, the phase coil of each phase has the 1st series coil part 1Y formed by mutually connecting the coil part for 6 turns in the coil part for 12 turns, and the remaining 6 turns. And the second series coil part 2Y formed by connecting the coil parts in series with each other, and the coil 3 is formed by Y-connecting (star connection) the first series coil part 1Y provided in the phase coil of each phase. One Y-connected body and a second Y-connected body formed by Y-connecting (star connection) the second series coil portion 2Y included in each phase phase coil are connected in parallel to each other. Hereinafter, the U-phase coil 3u will be described in detail with reference to FIGS. Note that the line segment connecting the conductor side portions 5 in FIGS. 8 to 11 merely indicates an electrical connection state, and does not indicate the position of the offset in the radial direction R.

  FIG. 8 is a schematic view showing an electrical connection state in the first series coil portion 1Y of the U-phase coil 3u, and FIG. 9 is a partially enlarged view thereof. FIG. 10 is a schematic diagram showing an electrical connection state in the second series coil portion 2Y of the U-phase coil 3u, and FIG. 11 is a partially enlarged view thereof. 9 and 11 are enlarged views of the vicinity of the connecting portion between the turns. Moreover, the figure which showed typically the connection relation of the 1st series coil part 1Y and the 2nd series coil part 2Y is inserted in FIG.9 and FIG.11. As shown in the inset, in this example, one end of the first series coil portion 1Y and one end of the second series coil portion 2Y are connected to form a power supply side terminal 13 connected to a power source. Further, the other end of the first series coil portion 1 </ b> Y is connected to the first neutral point 11, and the other end of the second series coil portion 1 </ b> Y is connected to the second neutral point 12. In FIG. 2, the end of the segment conductor 4 connected to the first neutral point 11 is attached to the end of the segment conductor connected to the power supply side terminal 13 (power supply side end). The part (first neutral point side end) is marked with “17”, and the end of the segment conductor 4 connected to the second neutral point 12 (second neutral point side end) is marked with “18” is attached. As is clear from FIG. 2, in the present embodiment, the power source side end portion 16, the first neutral point side end portion 17, and the second neutral point side end portion 18 are all arranged on the radially outward direction R2 side. Therefore, the configuration is advantageous with respect to the wiring. In addition, although the case where the 1st neutral point 11 and the 2nd neutral point 12 are isolate | separated is shown as an example here, it can also be set as the structure by which these neutral points are mutually connected. .

  Further, as shown in the inset of FIG. 9, the first series coil portion 1Y includes a 1Y first turn portion 1Y-1, a 1Y second turn portion 1Y-2, a 1Y third turn portion 1Y-3, a 1Y first turn portion. Four turn parts 1Y-4, 1Y fifth turn part 1Y-5, and 1Y sixth turn part 1Y-6 are connected in series with each other. And in FIG. 9, the character attached | subjected to the conductor side part 5 arrange | positioned in the slot 22 shows which turn part in the said conductor side part 5 comprises 1Y-1 to 1Y-6. Show. Here, as shown in FIG. 9, the junction between the 1Y first turn portion 1Y-1 and the 1Y second turn portion 1Y-2 is defined as a first turn junction 81, and the 1Y second turn portion 1Y−. 2 and the 1Y third turn portion 1Y-3 is the second turn-to-turn junction 82, and the 1Y third turn portion 1Y-3 and the 1Y fourth turn portion 1Y-4 are the joint portions. The joint portion between the third turn 83 and the 1Y fourth turn portion 1Y-4 and the 1Y fifth turn portion 1Y-5 is the fourth turn joint portion 84, and the 1Y fifth turn portion 1Y-5. And the 1Y sixth turn portion 1Y-6 is a fifth turn-to-turn junction 85.

  Similarly, as shown in the inset of FIG. 11, the second series coil portion 2Y includes 2Y first turn portion 2Y-1, 2Y second turn portion 2Y-2, 2Y third turn portion 2Y-3, 2Y fourth. The turn part 2Y-4, the 2Y fifth turn part 2Y-5, and the 2Y sixth turn part 2Y-6 are connected in series with each other. And in FIG. 11, the character attached | subjected to the conductor side part 5 arrange | positioned in the slot 22 shows which turn part in the said conductor side part 5 comprises 2Y-1-2Y-6. Show. Here, as shown in FIG. 11, the junction between the 2Y first turn 2Y-1 and the 2Y second turn 2Y-2 is a first turn junction 91, and the 2Y second turn 2Y-. 2 and the 2Y third turn part 2Y-3 is a second turn turn part 92, and the 2Y third turn part 2Y-3 and the 2Y fourth turn part 2Y-4 is a joint part. The junction part between the third turns 93 and the junction part between the 2Y fourth turn part 2Y-4 and the 2Y fifth turn part 2Y-5 is the fourth turn joint part 94, and the 2Y fifth turn part 2Y-5. And the 2Y sixth turn portion 2Y-6 is a fifth turn-to-turn junction 95.

  As shown in FIGS. 8-11, in this example, 1Y 1st turn part 1Y-1, 1Y 6th turn part 1Y-6, 2Y 1st turn part 2Y-1, and 2Y 6th turn part 2Y-6 However, it is comprised by the 1st layer segment conductor 41 and the 2nd layer segment conductor 42, and these turn parts are equivalent to "1st coil part A1" in this invention. Also, the 1Y second turn part 1Y-2, 1Y fifth turn part 1Y-5, 2Y second turn part 2Y-2, and 2Y fifth turn part 2Y-5 are formed by the third layer segment conductor 43 and the fourth layer. It is comprised by the segment conductor 44, and these turn parts are equivalent to "2nd coil part A2" in this invention. The 1Y third turn portion 1Y-3, the 1Y fourth turn portion 1Y-4, the 2Y third turn portion 2Y-3, and the 2Y fourth turn portion 2Y-4 are composed of the fifth layer segment conductor 45 and the sixth layer. It is comprised by the segment conductor 46, and these turn parts are equivalent to "3rd coil part A3" in this invention.

  As shown in FIG.8 and FIG.9, in the 1st series coil part 1Y, the inside of each turn part 1Y-1 to 1Y-6 and a part of junction part between turn parts (between turns) are the 1st. In the turn-to-turn joint 81, the second turn-to-turn joint 82, and the third turn-to-turn joint 83, the pair of conductor side parts 5 arranged in layers adjacent to each other in the slot 22 are electrically connected. In these parts, the basic segment conductor 4a is used. Similarly, as shown in FIGS. 10 and 11, in the second series coil portion 2 </ b> Y, it is a part of the inside of each turn portion 2 </ b> Y- 1 to 2 </ b> Y- 6 and between the turn portions (between turns). In the third turn joint 93, the fourth turn joint 94, and the fifth turn joint 95, the pair of conductor sides 5 arranged in the layers adjacent to each other in the slot 22 are electrically connected. Therefore, the basic segment conductor 4a is used in these parts.

  In other words, 1Y first turn part 1Y-1, 1Y sixth turn part 1Y-6, 2Y first turn part 2Y-1, and 2Y sixth turn part 2Y-6 corresponding to the first coil part A1 of the present invention. The first-layer segment conductor 41 and the second-layer segment conductor 42 in the inside are the basic segment conductor 4a. Also, the 1Y second turn portion 1Y-2, 1Y fifth turn portion 1Y-5, 2Y second turn portion 2Y-2, and 2Y fifth turn portion 2Y-5 corresponding to the second coil portion A2 of the present invention. The internal third-layer segment conductor 43 and fourth-layer segment conductor 44 serve as the basic segment conductor 4a. And 1Y 3rd turn part 1Y-3, 1Y 4th turn part 1Y-4, 2Y 3rd turn part 2Y-3, and 2Y 4th turn part 2Y-4 correspond to 3rd coil part A3 of this invention. The fifth-layer segment conductor 45 and the sixth-layer segment conductor 46 in the inside are the basic segment conductor 4a.

  On the other hand, as shown in FIG. 9, each of the fourth turn-to-turn joint 84 and the fifth turn-to-turn joint 85 in the first series coil portion 1 </ b> Y is disposed in a layer separated by three layers in the slot 22. Since the pair of conductor side portions 5 are electrically connected, the deformed segment conductor 4b is used at these joint portions. Similarly, as shown in FIG. 11, each of the first turn joint 91 and the second turn joint 92 in the second series coil portion 2 </ b> Y is arranged in a layer separated from each other in the slot 22 by three layers. Since the pair of conductor side portions 5 are electrically connected, the deformed segment conductor 4b is also used in these joint portions.

  As described above, in the present embodiment, the fourth turn-to-turn joint 84 and the fifth turn-to-turn joint 85 in the first series coil portion 1Y, and the first turn-to-turn joint 91 in the second series coil portion 2Y and the first turn. The deformed segment conductor 4b is used at the junction 92 between the two turns. And the joint part 84 between 4th turns and the joint part 85 between 5th turns in the 1st series coil part 1Y are mutually arrange | positioned in the same circumferential direction C position. Further, the first turn-to-turn joint 91 and the second turn-to-turn joint 92 in the second series coil portion 2Y are arranged at the same circumferential direction C position. That is, in this embodiment, a plurality (two in this example) of the deformed segment conductors 4b are arranged at the same circumferential direction C position. However, as described below, the plurality of deformed segment conductors 4b are appropriately arranged. It is possible to arrange in.

  2, 4, 10, and 11, the deformed segment conductor 4 b used for the first turn junction 91 in the second series coil portion 2 </ b> Y and the variant used for the second turn joint 92. The arrangement relationship with the segment conductor 4b will be described. As shown in these drawings, the first turn-to-turn joint 91 includes the first layer segment conductor 41 of the 2Y first turn portion 2Y-1 that is the first coil portion A1 and the 2Y second turn that is the second coil portion A2. One of the first layer segment conductor 41 and the fourth layer segment conductor 44 (this example) which is a joint portion of the two-turn portion 2Y-2 with the fourth layer segment conductor 44 and constitutes the first turn-to-turn joint portion 91 The fourth layer segment conductor 44) is a deformed segment conductor 4b. In the present embodiment, the deformed segment conductor 4b constituting the first turn-to-turn joint 91 and the first turn-to-turn joint 91 are respectively referred to as “first coil-to-coil joint” and “first connection deformed segment” in the present invention. Corresponds to "conductor".

  Also, the second turn-to-turn joint 92 includes the third layer segment conductor 43 of the 2Y second turn part 2Y-2 that is the second coil part A2, and the 2Y third turn part 2Y-3 that is the third coil part A3. Of the sixth layer segment conductor 46, and is one of the third layer segment conductor 43 and the sixth layer segment conductor 46 constituting the second turn-to-turn junction 92 (in this example, the sixth layer segment conductor 46). The conductor 46) is a deformed segment conductor 4b. In this embodiment, the deformed segment conductor 4b constituting the second turn-to-turn joint 92 and the second turn-to-turn joint 92 are respectively referred to as “second coil-to-coil joint” and “second connection deformed segment” in the present invention. Corresponds to "conductor".

  The deformed segment conductor 4b constituting the first turn-to-turn junction 91 and the deformed segment conductor 4b constituting the second turn-to-turn joint 92 have the conductor side portions 5 arranged in the same slot 22 and are deformed. The oblique projecting portions 7b are disposed at the same circumferential direction C position, and the offset directions in the radial direction R by the second offset bent portion 77 are the same (in this example, the radially outward direction R2 side). Then, one deformed segment conductor in which the conductor side portion 5 of the deformed segment conductor 4b constituting the first turn joint 91 and the deformed segment conductor 4b constituting the second turn joint 92 is located on the offset direction side. 4b (in this example, the deformed segment conductor 4b constituting the first turn-to-turn junction 91) is the other deformed segment conductor 4b (in this example, the deformed segment conductor 4b constituting the second turn-to-turn joint 92). The second offset bent portion 77 is provided on the conductor side portion 5 side in the circumferential direction C with respect to the second offset bent portion 77 (in this example, the second circumferential direction C2 side). In other words, the conductor side portions 5 are arranged in the same slot 22 and the deformed oblique projecting portions 7b are arranged in the same circumferential direction C position, and the offset direction in the radial direction R by the second offset bent portion 77 is mutually different. Regarding the plurality of deformed segment conductors 4b that are the same, the second offset bent portion 77 is formed on the conductor side 5 side in the circumferential direction C as the conductor side 5 is located on the offset direction side. Accordingly, even when the coil 3 includes a plurality of deformed segment conductors 4b disposed at the same circumferential direction C position, the deformed segment conductors 4b can be appropriately disposed without interfering with each other. It has become.

  Here, the arrangement relationship between the deformed segment conductor 4b used for the first turn joint 91 in the second series coil portion 2Y and the deformed segment conductor 4b used for the second turn joint 92 has been described. The same applies to the disposition relationship between the deformed segment conductor 4b used for the fourth turn joint 84 and the deformed segment conductor 4b used for the fifth turn joint 85 in the one series coil portion 1Y. That is, the fourth turn connecting portion 84 includes the sixth layer segment conductor 46 of the 1Y fourth turn portion 1Y-4 that is the third coil portion A3 and the 1Y fifth turn portion 1Y-5 that is the second coil portion A2. One of the third layer segment conductor 43 and the sixth layer segment conductor 46 (in this example, the sixth layer segment The conductor 46) is a deformed segment conductor 4b. Here, the deformed segment conductor 4b constituting the fourth turn-to-turn joint 84 and the fourth turn-to-turn joint 84 are respectively the “second coil-to-coil joint” and the “second connection deformed segment conductor” in the present invention. It corresponds to.

  Further, the fifth turn-to-turn joint 85 includes the fourth layer segment conductor 44 of the 1Y fifth turn portion 1Y-5 that is the second coil portion A2, and the 1Y sixth turn portion 1Y-6 that is the first coil portion A1. One of the first layer segment conductor 41 and the fourth layer segment conductor 44 (the fourth layer segment in this example). The conductor 44) is a deformed segment conductor 4b. Here, the deformed segment conductor 4b constituting the fifth turn-to-turn joint 85 and the fifth turn-to-turn joint 85 are respectively referred to as “first coil-to-coil joint” and “first connection deformed segment conductor” in the present invention. It corresponds to.

  The deformed segment conductor 4b constituting the fourth turn joint 84 and the deformed segment conductor 4b constituting the fifth turn joint 85 have the conductor side portions 5 disposed in the same slot 22 and are deformed. The oblique projecting portions 7b are disposed at the same circumferential direction C position, and the offset directions in the radial direction R by the second offset bent portion 77 are the same (in this example, the radially outward direction R2 side). Then, one deformed segment conductor in which the conductor side portion 5 of the deformed segment conductor 4b constituting the fourth turn joint 84 and the deformed segment conductor 4b constituting the fifth turn joint 85 is located on the offset direction side. 4b (in this example, the deformed segment conductor 4b constituting the fifth turn-to-turn junction 85) is the other deformed segment conductor 4b (in this example, the deformed segment conductor 4b constituting the fourth turn-to-turn junction 84). A second offset bent portion 77 is provided on the conductor side portion 5 side in the circumferential direction C with respect to the second offset bent portion 77 (in this example, the second circumferential direction C2 side) (see FIG. 3).

  Furthermore, in this embodiment, it is possible to keep the height of the coil end portion in the axial direction L low by providing the following configuration. As shown in FIG. 9, the third inter-turn joint 83 of the first series coil portion 1Y joins the segment conductors 4 in which the conductor side portions 5 are arranged in the slots 22 separated from each other by 7 slot pitches. Here, the basic segment conductor 4a used for the third turn-to-turn joint 83 is defined as a target basic segment conductor 4c. As shown in FIGS. 2 and 12, the slot 22 adjacent to the circumferential first direction C1 side with respect to the slot 22 in which the conductor side portion 5 of the target basic segment conductor 4c is arranged has the deformed segment conductor 4b. The conductor side portion 5 is disposed, and the target basic segment conductor 4c is disposed adjacent to the opposite side of the stator core 2 in the axial direction L with respect to the deformed segment conductor 4b.

  Specifically, the deformed skew projecting portion 7b of the deformed segment conductor 4b is disposed adjacent to the basic skew projecting portion 7a of the target basic segment conductor 4c on the stator core 2 side in the axial direction L. The segment conductor 4 to be joined to the target basic segment conductor 4c has the segment conductor 4 to be joined to the deformed segment conductor 4b and the parallel projecting portions 6 arranged at the same circumferential direction C position. When the parallel protruding portion 6 of the segment conductor 4 to be joined to the target basic segment conductor 4c is set as the target parallel protruding portion, the conductor side portion 5 of the deformed segment conductor 4b is disposed in the conductor side portion 5 of the target basic segment conductor 4c. The slot 22 is disposed adjacent to the slot 22 adjacent to the opposite side of the target parallel protrusion in the circumferential direction C.

  Since the target basic segment conductor 4c is arranged as described above, it is difficult to increase the bending angle of the first bent portion 73 of the target basic segment conductor 4c as compared to the other segment conductors 4. For this reason, the configuration of the target basic segment conductor 4c is the same as the configuration of the basic segment conductor 4a used for joining the segment conductors 4 in which the conductor side portions 5 are arranged in the slots 22 separated from each other by 6 slot pitches. Then, the joint portion between the target basic segment conductor 4c and the joint target segment conductor is positioned on the side opposite to the stator core 2 in the axial direction L with respect to the other joint portions.

  In this regard, in the present embodiment, by providing the large oblique portion 79 in the basic oblique projecting portion 7a of the target basic segment conductor 4c, the position L in the axial direction of the joint between the target basic segment conductor 4c and the target segment conductor to be joined is provided. Can be made the same as the position in the axial direction L of the other joints. As shown in FIG. 12, the large inclined portion 79 is a target parallel protruding portion in the circumferential direction C with respect to the second offset bent portion 77 provided in the deformed segment conductor 4b in the basic oblique protruding portion 7a of the target basic segment conductor 4c. This is a portion formed on the side (in this example, the first circumferential direction C1 side), and the inclination angle with respect to the extending direction of the conductor side portion 5 is set larger than that on the conductor side portion 5 side. That is, the extending direction of the large inclined portion 79 is set to a direction close to a direction parallel to the extending direction of the axial end face L of the stator core 2. Such a large inclined portion 79 is formed using a gap formed by offsetting the deformed oblique projecting portion 7 in the radially outward direction R2 by the second offset bent portion 77. Thereby, it is suppressed that the joint part of the object basic segment conductor 4c and the joining object segment conductor protrudes to the opposite side to the stator core 2 in the axial direction L as compared with the other joint parts. The axial L position of the joint portion between the target basic segment conductor 4c and the joint target segment conductor can be the same as the axial L position of the other joint portions.

4). Other Embodiments Finally, other embodiments according to the present invention will be described. Note that the features disclosed in each of the following embodiments can be used only in that embodiment, and can be applied to other embodiments as long as no contradiction arises.

(1) In the above embodiment, the configuration in which the segment conductors 4 constituting the phase coils of the respective phases are electrically connected as illustrated in FIGS. 8 to 11 has been described as an example. However, the embodiment of the present invention is not limited to this, and as shown in FIGS. 13 to 16, the segment conductors 4 constituting the phase coils of the respective phases are electrically connected. This is also one of the preferred embodiments of the present invention. 13 and 15 are drawings corresponding to FIGS. 8 and 10, FIG. 14 is a partially enlarged view of FIG. 13, and FIG. 16 is a partially enlarged view of FIG. In FIGS. 13 to 16, as in FIGS. 8 to 11, the line segment that connects the conductor side portions 5 merely indicates an electrical connection state, and represents the position of the offset in the radial direction R. It is not a thing. Even in this configuration, the first series coil portion 1Y and the second series coil portion 2Y are formed in the same manner as in the above embodiment, but the radial R position of the conductor side portion 5 constituting the turn portion is the above embodiment. Is different.

  That is, in this configuration, unlike the above embodiment, the 1Y first turn part 1Y-1, 1Y second turn part 1Y-2, 2Y first turn part 2Y-1, and 2Y second turn part 2Y-2 The first layer segment conductor 41 and the second layer segment conductor 42 are constituted by the turn portions corresponding to the “first coil portion A1” in the present invention. Further, the 1Y third turn portion 1Y-3, the 1Y fourth turn portion 1Y-4, the 2Y third turn portion 2Y-3, and the 2Y fourth turn portion 2Y-4 are composed of the third layer segment conductor 43 and the fourth layer. It is comprised by the segment conductor 44, and these turn parts are equivalent to "2nd coil part A2" in this invention. The 1Y fifth turn portion 1Y-5, the 1Y sixth turn portion 1Y-6, the 2Y fifth turn portion 2Y-5, and the 2Y sixth turn portion 2Y-6 include the fifth layer segment conductor 45 and the sixth layer. It is comprised by the segment conductor 46, and these turn parts are equivalent to "3rd coil part A3" in this invention.

  In this configuration, as is apparent from FIG. 14, the first series coil portion 1Y can be configured by the basic segment conductor 4a. On the other hand, as is apparent from FIG. 16, in the second series coil portion 2Y, the second turn joint 92 and the fourth turn joint 94 are arranged in layers separated from each other in the slot 22 by three layers. Since the pair of conductor side portions 5 are electrically connected, the deformed segment conductor 4b is used at these joint portions. In the second series coil portion 2Y, the target basic segment conductor 4c in the above embodiment can be used as the basic segment conductor 4a used for each of the first turn-to-turn joint 91 and the third turn-to-turn joint 93. .

(2) In the above embodiment, the conductor side in the deformed segment conductor 4b constituting the first turn joint 91 and the second segment conductor 4b constituting the second turn joint 92 in the second series coil portion 2Y. One deformed segment conductor 4b (in this example, the deformed segment conductor 4b constituting the first turn-to-turn junction 91) is located on the offset direction side, and the other deformed segment conductor 4b (in this example, the second deformed segment conductor 4b) The configuration in which the second offset bent portion 77 is provided on the conductor side 5 side in the circumferential direction C with respect to the second offset bent portion 77 of the deformed segment conductor 4b) constituting the inter-turn joint portion 92 has been described as an example. However, the embodiment of the present invention is not limited to this, and both the deformed segment conductor 4b constituting the first turn-to-turn junction 91 and the deformed segment conductor 4b constituting the second turn-to-turn joint 92 are It can also be set as the structure provided with the 2nd offset bending part 77 in the mutually same circumferential direction C position. The same applies to the deformed segment conductor 4b constituting the fourth turn joint 84 in the first series coil portion 1Y and the deformed segment conductor 4b constituting the fifth turn joint 85.

(3) In the above-described embodiment, the coil 3 includes two deformed segment conductors 4b in which the conductor side portions 5 are disposed in the same slot 22 and the deformed oblique projecting portions 7b are disposed in the same circumferential direction C position. The configuration including the above has been described as an example. However, the embodiment of the present invention is not limited to this, and the coil 3 has the conductor side portions 5 disposed in the same slot 22 and the deformed oblique projecting portions 7b disposed in the same circumferential direction C position. It can also be set as the structure provided with three or more deformed segment conductors 4b made. Even in such a configuration, the plurality of odd-shaped segment conductors 4b have the same offset direction in the radial direction R by the second offset bent portion 77, and the conductor side portion 5 is located on the offset direction side. It is preferable that the second offset bent portion 77 is formed on the conductor side portion 5 side in the circumferential direction C as it is. In addition, the coil 3 does not include a plurality of deformed segment conductors 4b in which the conductor side portions 5 are disposed in the same slot 22 and the deformed oblique projecting portions 7b are disposed in the same circumferential direction C position. Only a single deformed segment conductor 4b may be arranged at the C position.

(4) In the above embodiment, the coil 3 includes a plurality of deformed segment conductors 4b in which the conductor side portions 5 are disposed in the same slot 22 and the deformed oblique projecting portions 7b are disposed in the same circumferential direction C position. As an example, the configuration in which the offset directions in the radial direction R of the second offset bent portion 77 provided in each of the plurality of deformed segment conductors 4b are equal to each other has been described. However, the embodiment of the present invention is not limited to this, and has a configuration in which the deformed segment conductor 4b having the offset direction in the radial direction R opposite to each other is provided at the same circumferential direction C position or different circumferential direction C positions. You can also

(5) In the above embodiment, the target basic segment including the large inclined portion 79 as the basic segment conductor 4a that joins the segment conductors 4 in which the conductor side portions 5 are arranged in the slots 22 separated from each other by seven slot pitches. Although the configuration using the conductor 4c has been described as an example, a configuration using a normal basic segment conductor 4a that does not include the large inclined portion 79 may be used. Even in this case, the axial end L height of the coil end portion is high in only a part of the region in the circumferential direction and the radial direction, so that no major problem occurs.

(6) In the above embodiment, the configuration in which the skew projecting portion 7 includes the first offset bent portion 76 has been described as an example. However, the embodiment of the present invention is not limited to this, and the skew projecting portion 7 may be configured not to include the first offset bent portion 76. In this case, the oblique projecting portion 7 and the parallel projecting portion 6 are configured such that surfaces facing each other in the radial direction R are joined to each other.

(7) In the above embodiment, the configuration in which the phase coils of each phase are Y-connected (star-connected) has been described as an example. However, the embodiment of the present invention is not limited to this, and may be configured such that the phase coils of each phase are delta-connected.

(8) In the above embodiment, the configuration in which the phase coil of each phase includes the first series coil unit 1Y and the second series coil unit 2Y has been described as an example. However, the embodiment of the present invention is not limited to this, and the phase coil of each phase is configured to have a single series coil portion, or to be configured to have three or more series coil portions. Is also one preferred embodiment of the present invention.

(9) In the above embodiment, the third layer is set at a position adjacent to the second layer in the radial direction R1 side, and the fifth layer is in the radial direction with respect to the fourth layer. The configuration set at a position adjacent to the R1 side has been described as an example. However, the embodiment of the present invention is not limited to this, and another single or plural layers are arranged between the third layer and the second layer, or the fifth layer and the fourth layer are arranged. Another single layer or a plurality of layers may be arranged between them. In such a configuration, the deformed segment conductor 4b has a deformed oblique projecting portion that is joined to the parallel projecting portion of the joining target segment conductor in which the conductor side portions 5 are disposed in layers separated by four layers or five or more layers in the radial direction. 7b, and the offset amount of the second offset bent portion 77 is also set to 3 times (3 layers) or 4 times or more (4 layers or more) of the thickness of the linear conductor in the radial direction R.

(10) In the above embodiment, an example is shown in which the oblique projecting portions 7 of all the segment conductors 4 have a shape extending toward the circumferential first direction C1 as they move away from the stator core 2 in the axial direction L. As explained. However, the embodiment of the present invention is not limited to this, and the oblique protrusions 7 of all the segment conductors 4 extend from the stator core 2 toward the second circumferential direction C2 as the distance from the stator core 2 in the axial direction L increases. A configuration having a shape is also one of the preferred embodiments of the present invention. That is, it can be set as the structure which replaced the circumferential first direction C1 and the circumferential second direction C2 in the said embodiment.

(11) In the above embodiment, an example is shown in which the oblique projecting portions 7 of all the segment conductors 4 have a shape extending toward the same side in the circumferential direction C as they move away from the stator core 2 in the axial direction L. As explained. However, the embodiment of the present invention is not limited to this, and the segment conductor 4 including the skew projecting portion 7 having a shape in which the coil 3 extends to the one side in the circumferential direction C as it moves away from the stator core 2 in the axial direction L. One of the preferred embodiments of the present invention may be configured to include both the segment conductor 4 including the skew projecting portion 7 having a shape extending toward the other side in the circumferential direction C as it is separated from the stator core 2 in the axial direction L. One. In this configuration, at least a part of the coil 3 can be formed by lap winding. That is, unlike the coil 3 in the above-described embodiment, the coil 3 may be configured by combining wave winding and lap winding, or the coil 3 may be formed only by lap winding.

(12) In the above embodiment, the configuration in which the first radial direction is the outer radial direction R2 and the second radial direction is the inner radial direction R1 has been described as an example. However, the embodiment of the present invention is not limited to this, and it is naturally possible to adopt a configuration in which the first radial direction is the inner radial direction R1 and the second radial direction is the outer radial direction R2. .

(13) In the above embodiment, the layer segment adjacent to the joining target segment conductor in the radial direction R with respect to the deformed segment conductor 4b is a layer adjacent to the radial direction R on the side close to the conductor side 5 of the deformed segment conductor 4b. The configuration is described as an example. However, the embodiment of the present invention is not limited to this, and the layer segment adjacent to the joining target segment conductor in the radial direction R with respect to the deformed segment conductor 4b is located farther from the conductor side portion 5 of the deformed segment conductor 4b. It is also possible to make the layers adjacent to each other in the radial direction R.

(14) In the above embodiment, the case where the shape of the cross section orthogonal to the extending direction of the linear conductors constituting the segment conductor 4 is rectangular has been described as an example. However, the embodiment of the present invention is not limited to this, and the preferred embodiment of the present invention is such that the cross-sectional shape of the linear conductor is a circular shape, an elliptical shape, a polygonal shape other than a rectangular shape, or the like. one of.

(15) In the above embodiment, the case where the armature for a rotating electrical machine according to the present invention is applied to a stator for an inner rotor type rotating electrical machine has been described as an example. It is also suitable to apply. Moreover, the armature for a rotating electrical machine according to the present invention can be applied to a rotor for a fixed field type rotating electrical machine.

(16) Regarding other configurations as well, the embodiments disclosed herein are illustrative in all respects, and embodiments of the present invention are not limited thereto. That is, as long as the configuration described in the claims of the present application and a configuration equivalent thereto are provided, a configuration obtained by appropriately modifying a part of the configuration not described in the claims is naturally also included in the present invention. Belongs to the technical scope.

  The present invention relates to an armature core including a plurality of teeth formed in a circumferential direction of a core reference surface and a plurality of teeth formed between adjacent slots, the slots extending in the axial direction of the cylindrical core reference surface. It can utilize suitably for the armature for rotary electric machines provided with the coil wound by the child core.

1: Stator (armature for rotating armature)
2: Stator core (armature core)
3: Coil 3u: U-phase coil 3v: V-phase coil 3w: W-phase coil 4: Segment conductor 4a: Basic segment conductor 4b: Deformed segment conductor 4c: Target basic segment conductor 5: Conductor side 6: Parallel protrusion 7: Skew protrusion 7b: Deformed skew protrusion 21: Core reference surface 22: Slot 23: Teeth 41: First layer segment conductor 42: Second layer segment conductor 43: Third layer segment conductor 44: Fourth layer segment conductor 45: Fifth layer segment conductor 46: Sixth layer segment conductor 71a: Front end side main body portion (second oblique portion)
71b: Base end side main body (first skew portion)
77: Second offset bent portion (offset bent portion)
78: tip portion 79: large inclined portion A1: first coil portion A2: second coil portion A3: third coil portion C: circumferential direction L: axial direction R: radial direction R1: radially inward direction (second radial direction)
R2: Outer diameter direction (first diameter direction)

Claims (6)

An armature core including a plurality of teeth extending in the circumferential direction of the core reference surface and a plurality of teeth formed between adjacent slots, the slots extending in the axial direction of the cylindrical core reference surface, and the armature core A coil wound around the armature for a rotating electric machine,
The coil is configured by joining a plurality of segment conductors,
Each of the segment conductors is a linear conductor side portion disposed in the slot, and a parallel protruding portion that extends parallel to the extending direction of the conductor side portion and protrudes in the axial direction from the armature core, It extends from the conductor side on the opposite side to the parallel protrusion, protrudes from the armature core in the axial direction, and gradually extends away from the armature core in the axial direction. Inclining in the circumferential direction with respect to the conductor, and the oblique projecting portion extending from the conductor side portion to the parallel projecting portion of the segment conductor to be joined, which is the other segment conductor to be joined,
The tip of the skew projecting portion is joined to the parallel projecting portion of the joining target segment conductor,
Within each slot, each of the plurality of segment conductors arranged in the radial direction of the core reference surface as a layer, and the plurality of segment conductors have the conductor side portions in a layer adjacent in the radial direction. The basic segment conductor having the oblique projecting portion joined to the parallel projecting portion of the arranged segment conductor to be joined, and the joining in which the conductor side portion is arranged in a layer separated by three or more layers in the radial direction. A deformed segment conductor having the skew projecting portion joined to the parallel projecting portion of the target segment conductor,
The deformed skew projecting portion, which is the skew projecting portion provided in the deformed segment conductor, is coupled to the conductor side portion and inclined with respect to the extending direction of the conductor side portion, and A second skewed portion formed on the tip end side with respect to the first skewed portion and inclined with respect to the extending direction of the conductor side portion; and the second skewed portion is defined as the first skewed portion. An offset bending portion that is offset in the radial direction of the core reference surface and connects the first skew portion and the second skew portion,
The offset bent portion is formed at the same circumferential position as any one of the teeth, and the conductor side portion is disposed in a layer adjacent to the joining target segment conductor in the deformed segment conductor in the radial direction. An armature for a rotating electrical machine formed so as to offset the second skewed portion to the same radial position as the skew projecting portion of the basic segment conductor.   2. The rotating electrical machine according to claim 1, wherein a layer adjacent to the joining target segment conductor in the deformed segment conductor in the radial direction is a layer adjacent in the radial direction closer to the conductor side of the deformed segment conductor. Armature. The coil includes a plurality of deformed segment conductors in which the conductor side portions are disposed in the same slot and the deformed oblique projecting portions are disposed at the same circumferential position.
In the plurality of deformed segment conductors, the offset direction in the radial direction by the offset bend portion is the same as each other, and the offset bend portion is in the circumferential direction as the conductor side portion is located on the offset direction side. The armature for rotary electric machines according to claim 1 or 2, wherein the armature is formed on the conductor side portion side. One side in the radial direction of the core reference surface is the first radial direction side, the other side is the second radial direction side,
The segment conductor in which the conductor side portion is arranged in the first layer set at a predetermined radial position in the slot is adjacent to the first layer segment conductor and the first layer in the second radial direction side. The segment conductor in which the conductor side portion is arranged in the second layer set to a position where the second layer segment conductor is set to the second layer, and the third layer set to the second radial direction position with respect to the second layer The segment conductor in which the conductor side part is arranged is a third layer segment conductor, and the conductor side part is arranged in a fourth layer set at a position adjacent to the second layer side in the radial direction with respect to the third layer. The segment conductor made a fourth layer segment conductor,
The coil includes a first coil portion constituted by the first layer segment conductor and the second layer segment conductor, a second coil portion constituted by the third layer segment conductor and the fourth layer segment conductor, With
The first layer segment conductor and the second layer segment conductor in the first coil portion, and the third layer segment conductor and the fourth layer segment conductor in the second coil portion are the basic segment conductors,
The first layer segment conductor and the fourth layer constituting the inter-coil joint portion which is a joint portion between the first layer segment conductor of the first coil portion and the fourth layer segment conductor of the second coil portion. The armature for rotating electrical machines according to any one of claims 1 to 3, wherein any one of the segment conductors is the deformed segment conductor. While making the joint part between the coil parts a joint part between the first coil parts, the deformed segment conductor constituting the joint part between the first coil parts is a first connection deformed segment conductor,
The segment conductor in which the conductor side portion is disposed on the fifth layer set at a position on the second radial direction side with respect to the fourth layer in the slot is changed to the fifth layer segment conductor, the fifth layer. On the other hand, the segment conductor in which the conductor side portion is arranged in the sixth layer set at a position adjacent to the second radial direction side is a sixth layer segment conductor,
The coil further includes a third coil portion configured by the fifth layer segment conductor and the sixth layer segment conductor,
The fifth layer segment conductor and the sixth layer segment conductor in the third coil portion are the basic segment conductors,
The third layer segment conductor constituting the joint portion between the second coil portions, which is a joint portion between the third layer segment conductor of the second coil portion and the sixth layer segment conductor of the third coil portion, and the first Any one of the six-layer segment conductors is the deformed segment conductor, the deformed segment conductor is a second connection deformed segment conductor,
The first connection variant segment conductor and the second connection variant segment conductor are arranged such that the conductor side portions are arranged in the same slot and the variant oblique projecting portions are arranged at the same circumferential position, The radial offset directions by the offset bends are the same as each other,
One connection variant segment conductor in which the conductor side portion of the first connection variant segment conductor and the second connection variant segment conductor is located on the offset direction side is located on the offset bent portion of the other connection variant segment conductor. 5. The armature for a rotating electrical machine according to claim 4, wherein the offset bending portion is provided on the conductor side portion side in the circumferential direction. The coil includes a target basic segment conductor which is the basic segment conductor disposed adjacent to the opposite side of the armature core in the axial direction of the core reference plane with respect to the deformed segment conductor,
The segment conductors to be joined with the target basic segment conductor are arranged such that the segment conductors to be joined with the deformed segment conductors and the parallel protrusions are arranged at the same circumferential position, and the target basic segment conductors The parallel protrusions of the segment conductors to be joined are defined as target parallel protrusions,
The conductor side portion of the target basic segment conductor is disposed in the slot adjacent to the opposite side of the target parallel protrusion in the circumferential direction with respect to the slot in which the conductor side portion of the deformed segment conductor is disposed. And
The skew projecting portion of the target basic segment conductor has an inclination angle with respect to the extending direction of the conductor side portion on the side of the target parallel projecting portion in the circumferential direction with respect to the offset bent portion included in the deformed segment conductor. The armature for a rotating electrical machine according to any one of claims 1 to 5, wherein the armature has a large inclined portion that is larger than a conductor side portion side.

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