JP2013070523A - Armature for rotary electric machine and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for easily setting an odd number of coil windings on a conductor side, the coil windings being arranged in a radial direction in each slot of a rotary electric machine comprising a coil composed of a plurality of coil parts, the coil parts being formed by winding a linear conductor.SOLUTION: An armature for a rotary electric machine comprising a coil that is wound around an armature core having total K slots 22 per each pole and each phase. The coil comprises: an L winding coil part formed by winding one single piece of linear conductor L times (L represents an odd number); and an M winding coil part formed by winding the linear conductor M times (M represents an even number), each part is consecutively repeated K times alternately. Each coil part respectively has an even number of conductor side parts 33, which are divided half into a first conductor side group 41 and a second conductor side group 42. The first conductor side group 41 of one of the L winding coil parts and the second conductor side group 42 of one of the M winding coil parts are placed together so that the conductor side part 33 having (L+M) coil windings is disposed in each of all the slots 22.

Description

  The present invention provides a rotation including an armature core in which 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 coil wound around the armature core The present invention relates to an armature for an electric machine and a method for manufacturing the same.

  As an armature for a rotating electrical machine as described above, one manufactured by the method described in Japanese Patent Application Laid-Open No. 2007-166849 (Patent Document 1) is known. In this method, a plurality of coil portions are formed by rotating the linear conductors the same number of times, half of the plurality of conductor side portions of each of the coil portions is inserted into the slot, and the remaining half is not inserted All coil parts are arranged in each slot so that After that, the conductor side portion which is not inserted is moved along the circumferential direction and then moved in the radial direction to be inserted into the slot.

  As described above, in the manufacturing method disclosed in Patent Document 1, the plurality of conductor side portions of each coil portion are divided into two groups each having a half, and these are divided into two sets before and after being moved relative to each other in the circumferential direction. For this reason, in the armature for a rotating electric machine after completion, the number of conductor side portions arranged in the radial direction in each slot is always an even number. However, the magnitude of the torque and back electromotive force that can be generated in the rotating electrical machine can vary depending on the number of turns (number of turns) of the coil. Therefore, in order to obtain desired characteristics, it may be desirable to make the number of conductor side portions arranged in the radial direction in each slot an odd number. The technique of patent document 1 has the subject that such a request | requirement cannot be satisfy | filled appropriately.

JP 2007-166849 A

  Therefore, in an armature for a rotating electrical machine including a coil having a plurality of coil portions formed by winding a linear conductor, the number of conductor side portions arranged in the radial direction in each slot can be easily set to an odd number. Realization of possible technology is desired.

  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 coil wound around the armature core. The characteristic structure of the armature for a rotating electrical machine provided is that the armature core has K slots (K represents a natural number) per phase per pole, and the coil has one linear conductor. L-wrapped coil portion that is rotated L times (L represents an odd number of 1 or more) and M-wrapped coil portion that is wound M times (M represents an even number of 2 or more) of one linear conductor. And the continuous K pieces of the L-wrapped coil part and the continuous K pieces of the M-wrapped coil part are alternately connected, and the L-wrapped coil part and the M-wrapped coil part Each of the portions includes an even number of conductor side portions that are portions disposed in the slot. Half of each of the even number of the conductor side parts is divided into a pair of conductor side parts and a second conductor side part set, which are a pair of conductor side parts having the same current direction in the slot. One of the plurality of L-circular coil portions is disposed in the pair of slots, with one radial side of the core reference surface being a first radial direction and the other radial side being a second radial direction. The first conductor side portion set of the first coil portion is arranged at the first radial side portion of the first slot among the plurality of slots, and the second portion of the first coil portion is A conductor side portion group is disposed in the second radial direction side portion of the second slot of the plurality of slots, and is a second coil portion that is one of the plurality of M circumferential winding coil portions. The first conductor side group is disposed on the first radial side portion of the second slot; The second conductor side portion set of the second coil portion is disposed in a second radial side portion of the third slot or the first slot of the plurality of slots, and the armature core is In each of all the slots provided, the conductor side set of any one of the L-wrapped coil portions and the conductor side set of any one of the M-wrapped coil portions are combined ( L + M) is that the conductor side portions are arranged.

  According to said characteristic structure, in the coil which has two or more coil parts (concept which includes both L circumference coil part and M circumference coil part) by which a linear conductor is circulated, the circumference | surroundings of L circumference coil part By setting the number of times to L times, 2 L conductor side portions, which are portions of the linear conductor arranged in the slot, can be provided in each L-wrapped coil portion. The 2L conductor side portions of each L-wrapped coil portion are divided into a first conductor side set and a second conductor side set by half (L) and are arranged in a pair of slots. Further, by setting the number of turns of the M-wrapped coil portion to M, each M-wrapped coil portion can be provided with 2M conductor side portions. The 2M conductor side portions of each M-wrapped coil portion are divided into a first conductor side set and a second conductor side set by half (M) and are arranged in a pair of slots. In other words, the L first conductor side set of the first coil portion is arranged at the first radial side portion of the first slot, and the L second conductor side set is also the second slot. It is arrange | positioned at the diameter 2nd direction side part. Similarly, the M first conductor side part sets of the second coil part are arranged on the first radial side portion of the second slot, and the M second conductor side part sets are also third. (This third slot may be the same as the first slot depending on the number of magnetic poles). By sequentially arranging the other coil portions in the slots in the same manner, in each of all the slots, one of the pair of conductor side portions of any one L-wrapped coil portion, (L + M) conductor side portions are arranged together with one of a pair of conductor side portion sets of any one M-turn coil portion. Here, since L is an odd number and M is an even number, (L + M) is always an odd number. Therefore, the number of conductor side portions arranged in the radial direction in each slot can be easily set to an odd number.

  In addition, since the L circumferential coil portion and the M circumferential coil portion are alternately connected by the number corresponding to the number of slots per phase per phase, the first slot and the second slot are circumferentially connected. Thus, a coil suitable for an armature for a rotating electrical machine having a configuration shifted by one magnetic pole pitch can be appropriately configured. In addition, the first conductor side group and the second conductor side group in each coil unit are each composed of one or more conductor side groups having the same current direction in the slot. The direction of the current flowing through the conductor side is unified. Therefore, the directions of the currents flowing through all the conductor side portions arranged in the same slot can be easily aligned, and the odd-numbered coil as described above can be appropriately configured.

  Here, with respect to the L-wrapped coil portion and the M-wrapped coil portion in which the conductor side portion group is disposed in the same slot, the winding direction of the linear conductor constituting the L-wrapped coil portion and the It is preferable that the winding directions of the linear conductors constituting the M-wrapped coil portion are opposite to each other.

  According to this configuration, the current direction of the linear conductor constituting one first conductor side set of the L circumferential coil portions as the first coil portion, and the second coil portion as the second coil portion It is possible to make the current direction of the linear conductors constituting one second conductor side part group of the M circumferential coil portions coincide with each other. Therefore, the direction of the current flowing through all the conductor side portions arranged in the same slot can be made uniform.

  Further, each of the L-wrapped coil portion and the M-wrapped coil portion is formed in a spiral shape that circulates without crossing the linear conductors constituting these coil portions when viewed in the circumferential direction. It is preferable.

  According to this configuration, for each L-wrapped coil portion and each M-wrapped coil portion, the connection between the first conductor side set and the second conductor side set that are arranged in a pair of slots at different circumferential positions. In the portion, the crossing of the linear conductors is suppressed. Therefore, generation | occurrence | production of the rubbing of a linear conductor in the said part, interference, etc. can be suppressed, and the performance of the armature for rotary electric machines can be maintained favorable.

  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 coil wound around the armature core. The characteristic configuration of the manufacturing method of the armature for a rotating electrical machine having the number of the armature cores K per slot per phase (K represents a natural number) is that the linear conductor is L times (L is 1 or more). An L-wrapped coil portion that is rotated (representing an odd number) and an M-wrapped coil portion that is rotated M times (M represents an even number of 2 or more) of the linear conductor are alternately connected K units. A coil part forming step to be formed on the conductor, and each of the L-wrapped coil part and the M-wrapped coil part in each of the linear conductors, the conductor side part being a part disposed in the slot, in half A pair of conductors with the same current direction in each The first conductor side set and the second conductor side in each of the L circumferential coil part and the M circumferential coil part are divided into a first conductor side part group and a second conductor side part group which are parts All the L-wrapped coil portions and all the M are inserted so that one of the sets is inserted into the slot and the other of the first conductor side set and the second conductor side set is not inserted. The coil part arrangement step of arranging the circumferentially wound coil part, and the first conductor side part group and the second conductor side part group in each of the L circumferentially wound coil part and the M circumferentially wound coil part are collectively described above. A coil part deforming step of deforming the coil part by relatively moving in the circumferential direction; and after the coil part deforming step, the conductor side set that has not been inserted in the coil part arranging step is the core reference The core is moved in the radial direction of the surface and inserted into the slot. In that it comprises a pole tip inserting step.

  According to this characteristic configuration, in the coil having a plurality of coil portions (concepts including both the L-wrapped coil portion and the M-wrapped coil portion) formed by rotating the linear conductor, the coil portion is formed in the coil portion forming step. By setting the number of turns of each L-wrapped coil portion to L times, 2 L conductor side portions that are portions of a linear conductor disposed in the slot can be provided in each L-wrapped coil portion. . Further, by setting the number of turns of each M-wrapped coil portion to M, each M-wrapped coil portion can be provided with 2M conductor side portions. The 2L conductor side parts of each L-wrapped coil part are divided into L first conductor side part groups and second conductor side part groups, and arranged in a pair of slots. Further, the 2M conductor side portions of each M-wrapped coil portion are divided into M first conductor side portion groups and second conductor side portion groups, and are arranged in a pair of slots. That is, in the coil part arranging step, one of the first conductor side part set and the second conductor side part set of each coil part is inserted into the slot, and the first conductor side part set and the second conductor side part set All the coil portions are arranged so that the other of them is not inserted. Thereafter, the first conductor side group and the second conductor side group in each coil unit are collectively moved relative to each other in the circumferential direction in the coil unit deformation step, and then the conductor side unit that is not inserted The set is inserted into the slot in the coil part insertion step. As a result, the L conductor side portions of any one L-wrapped coil portion and the M conductor side portions of any one M-wrapped coil portion are aligned with each other in all slots. (L + M) conductor sides are arranged. Here, since L is an odd number and M is an even number, (L + M) is always an odd number. Therefore, the number of conductor side portions arranged in the radial direction in each slot can be easily set to an odd number.

  In addition, since the L circumferential coil portion and the M circumferential coil portion are alternately connected by the number corresponding to the number of slots per phase per phase, the first slot and the second slot are circumferentially connected. Thus, a coil suitable for an armature for a rotating electrical machine having a configuration shifted by one magnetic pole pitch can be appropriately configured. In addition, the first conductor side group and the second conductor side group in each coil section are each composed of one or a plurality of conductor side groups having the same current direction in the slot. The direction of the current flowing through the conductor side is unified. Therefore, the directions of the currents flowing through all the conductor side portions arranged in the same slot can be easily aligned, and the odd-numbered coil as described above can be appropriately configured.

It is a perspective view of the armature for rotary electric machines which concerns on 1st embodiment. It is a flowchart which shows the manufacturing method of the armature for rotary electric machines which concerns on 1st embodiment. It is a perspective view of the phase coil formed at a coil part formation process. It is a schematic diagram which expand | deploys and shows the phase coil formed at a coil part formation process in the circumferential direction. It is a top view which shows the arrangement | positioning state in the axial direction view of each coil part after a coil part arrangement | positioning process. It is a schematic diagram which expand | deploys and shows the phase coil after a coil part arrangement | positioning process in the circumferential direction. It is a top view which shows the arrangement | positioning state by the axial view of each coil part after a coil part deformation | transformation process. It is a schematic diagram which expand | deploys and shows the phase coil after a coil part deformation | transformation process in the circumferential direction. It is a top view which shows the arrangement | positioning state by the axial view of each coil part after a coil part insertion process. It is a schematic diagram which expand | deploys and shows the phase coil after the coil part insertion process in the circumferential direction. It is a schematic diagram which expands and shows the phase coil formed at the coil part formation process which concerns on 2nd embodiment in the circumferential direction. It is a schematic diagram which expand | deploys and shows the phase coil after the coil part arrangement | positioning process which concerns on 2nd embodiment in the circumferential direction. It is a schematic diagram which expand | deploys and shows the phase coil after the coil part deformation | transformation process which concerns on 2nd embodiment in the circumferential direction. It is a schematic diagram which expand | deploys and shows the phase coil after the coil part insertion process which concerns on 2nd embodiment in the circumferential direction.

1. First Embodiment A first embodiment of an armature for a rotating electrical machine and a method for manufacturing the same according to the present invention will be described with reference to the drawings. In this embodiment, a stator 1 for a rotating electrical machine as an armature for a rotating electrical machine will be described as an example. The “rotary electric machine” is a concept including any of a motor (electric motor), a generator (generator), and a motor / generator that functions as both a motor and a generator as necessary. According to the manufacturing method according to the present embodiment, it is possible to easily manufacture the stator 1 including the so-called odd-numbered (odd-turn) coil 3. Below, the structure of the stator 1 and the manufacturing method of the stator 1 are demonstrated in order.

  In the following description, unless otherwise specified, the “axial direction L”, “circumferential direction C”, and “radial direction R” indicate the axial center X of the cylindrical core reference surface 21 of the stator core 2. It is defined as a standard. “Axis first direction L1” represents the upper side along the axis direction L in FIG. 1, and “Axis second direction L2” represents the lower side. The “circumferential first direction C1” represents the clockwise direction in the axial direction L viewed from the axial first direction L1, and the “circumferential second direction C2” represents the counterclockwise direction. The “diameter first direction R1” represents a direction toward the outer side of the radial direction R of the core reference surface 21, and the “diameter second direction R2” represents a direction toward the inner side of the radial direction R. In addition, about each member which comprises the coil 3, these are prescribed | regulated as a direction in the state with which the stator core 2 was mounted | worn.

  In addition, regarding the explanation of each process in the manufacturing stage, each direction is defined as corresponding to the stator 1 as a finished product.

1-1. Configuration of Stator The configuration of the stator 1 according to the present embodiment will be described with reference to FIG. The stator 1 is a stator of an inner rotor type rotating electrical machine. As shown in FIG. 1, the stator 1 includes a stator core 2 as an armature core and a coil 3 wound around the stator core 2. In FIG. 1, only a part of the coil end portion that is a portion of the coil 3 protruding in the axial direction L from the stator core 2 is shown, and the other portions are not shown. On the second radial direction R2 side of the stator core 2, a rotor (not shown) as a field magnet having a permanent magnet, an electromagnet, or the like is disposed.

  The stator core 2 is formed using a magnetic material. The stator core 2 has a plurality of slots 22 distributed in the circumferential direction C of the cylindrical core reference surface 21 and a plurality of teeth 23 formed between two slots 22 adjacent to each other in the circumferential direction C. . The “cylindrical core reference surface 21” is a virtual surface that serves as a reference for the arrangement and configuration of the slots 22. In the present embodiment, a virtual cylindrical surface (core inner peripheral surface) including end surfaces on the radial second direction R2 side of the plurality of teeth 23 is used as the core reference surface 21. A surface (core outer peripheral surface) on the first radial direction R1 side of the stator core 2 may be used as the core reference surface 21.

  The plurality of slots 22 are distributed at regular intervals along the circumferential direction C. Each slot 22 extends in the axial direction L and is formed to extend radially from the axis X of the stator core 2 in the radial direction R. Each slot 22 has the same shape as each other, and is formed in a groove shape extending in the axial direction L and the radial direction R and having a predetermined width in the circumferential direction C. Each slot 22 is opened on the radial second direction R2 side (opened on the inner peripheral surface of the core).

  The plurality of teeth 23 are formed between two slots 22 adjacent to each other in the circumferential direction C, and are distributed at regular intervals along the circumferential direction C. Each tooth 23 has the same shape as each other, and is formed in a thick plate shape extending in the axial direction L and the radial direction R and having a predetermined width in the circumferential direction C.

  In this embodiment, the rotating electrical machine is an AC motor driven by a multiphase AC (three-phase AC in this example). The coil 3 of the stator 1 has three phase coils (U-phase coil, V-phase coil, W-phase coil) in which alternating currents having different phases flow corresponding to each of three phases (U-phase, V-phase, W-phase). ). Accordingly, the U-phase, V-phase, and W-phase slots 22 are arranged in the stator core 2 so as to repeatedly appear in the circumferential direction C. Assuming that the number of slots per phase per pole is K (K represents a natural number), this K is set to “2” in this example. That is, the stator core 2 is arranged so that the slots 22 for each phase repeatedly appear along the circumferential direction C by K pieces (that is, two pieces in this example). In this example, the number of magnetic poles per phase is “8”, and the stator core 2 is provided with a total of 48 (= 2 × 8 × 3) slots 22.

  The coil 3 includes a plurality of transition portions 39 at a coil end portion that protrudes in the axial direction L from the stator core 2 in a state of being wound around the stator core 2. The crossover portion 39 is a portion extending at least in the circumferential direction C so as to connect different slots 22 of the stator core 2. As shown in FIG. 1 and the like, each crossover portion 39 has a pair of 6 (= 2 × 3) slot pitches apart from each other according to the number of slots (2) and the number of phases (3) per phase. The slots 22 are arranged so as to connect each other.

  Each crossover portion 39 is positioned on the radial second direction R2 side with respect to the other crossover portion 39 at the same circumferential direction C position at the end portion on the circumferential first direction C1 side, and at the end on the circumferential second direction C2 side. It arrange | positions so that it may be located in the diameter 1st direction R1 side with respect to the other transition part 39 in the same circumferential direction C position in a part. Each crossover portion 39 is arranged so as to go from the second radial direction R2 side to the first radial direction R1 side from the first circumferential direction C1 side toward the second circumferential direction C2 side. Then, the two transition portions 39 adjacent to each other in the circumferential direction C are arranged so as to have overlapping portions in the radial direction R view. In addition, regarding the arrangement of the two members, “having overlapping portions when viewed in a predetermined direction” means that when the viewpoint is moved in each direction orthogonal to the line-of-sight direction with the predetermined direction as the line-of-sight direction, This means that the overlapping viewpoints exist in at least some areas. In this way, the plurality of transition portions 39 are arranged in a radial spiral shape as a whole when viewed in the axial direction L.

  The coil 3 includes a plurality of coil portions 32. Each coil portion 32 is configured by rotating one linear conductor 31. The linear conductor 31 is a linear conductor made of a metal such as copper or aluminum. As such a linear conductor 31, a conductor configured as a twisted line obtained by bundling a plurality of thin wires, a conductor having a predetermined shape (for example, a rectangular shape) whose cross section perpendicular to the extending direction is a certain size or more, etc. Can be used. The former example is shown in FIGS. An insulating film made of resin or the like is formed on the surface of the linear conductor 31. Each coil part 32 is provided with a plurality of conductor side parts 33 which are part of the linear conductor 31 and are parts arranged in the slot 22. The plurality of conductor side portions 33 are divided into a pair of conductor side portion groups 41 and 42 and arranged in the pair of slots 22. The coil 3 composed of the plurality of coil portions 32 is wound around the stator core 2 by overlapping winding and distributed winding.

1-2. Stator Manufacturing Method A method for manufacturing the stator 1 according to the present embodiment will be described with reference to FIGS. As shown in FIG. 2, the stator 1 according to this embodiment is manufactured through a coil part forming process P1, a coil part arranging process P2, a coil part deforming process P3, and a coil part inserting process P4. Each of these processes P1-P4 is performed in the order of description. Hereinafter, each process is demonstrated in order. In the following, description will be given mainly focusing on one of the three phase coils (U-phase coil 3U) included in the stator 1.

1-2-1. Coil Part Forming Step The coil part forming step P1 is a step of forming a plurality of coil portions 32 formed by rotating the linear conductor 31 a plurality of times. In the coil part forming step P1, by winding the linear conductor 31 L times (L represents an odd number of 1 or more) using a winding frame or the like, as shown in FIG. 3 and FIG. 32 (L circumferential coil portion 32L) is formed. Further, by winding the linear conductor 31 M times (M represents an even number of 2 or more) using a winding frame or the like, as shown in FIG. 3 and FIG. Coil portion 32M) is formed. In the present embodiment, the L-wrapped coil portion 32L and the M-wrapped coil portion 32M are formed so that the relationship “LM = 1” is established between L and M. In this example, L is “3” and M is “2”.

  At this time, in each coil part 32 (concept including both the L-circular coil part 32L and the M-circular coil part 32M), the linear conductor 31 circulates on the virtual plane from the center side toward the outside. Is formed. Each coil portion 32 is formed in a spiral shape that circulates without crossing the linear conductor 31 when viewed from a direction orthogonal to the virtual plane (circumferential direction C in the completed stator 1). Each L-wrapped coil portion 32L formed by being wound around L rounds (three rounds in this example), the conductor side portion 33 which is a portion disposed in the slot 22 of the linear conductor 31 2L (six in this example) equivalent to twice this. Further, each M-turn coil portion 32M formed by being wound around M rounds (two rounds in this example) includes 2M conductor side parts 33 (four in this example).

  Such a coil portion 32 of L or M winding has a total of 16 (= 2 × 8) according to the number of slots per phase per phase (2) and the number of magnetic poles per phase (8). Individually formed. At this time, the L circumference coil part 32L and the M circumference coil part 32M are formed by the same number, and each eight is formed. In FIG. 4, the upper stage shows the U-phase coil 3 </ b> U in a state where the virtual planes of the respective coil parts 32 coincide with each other, and the lower stage schematically shows the conductor side parts 33 constituting each coil part 32. ing. In FIG. 4 and the like, the reference numerals (a) to (p) attached adjacent to each coil part 32 are identification codes for distinguishing each coil part 32 in the U-phase coil 3U. This corresponds to the arrangement order in the circumferential direction C in the state of being wound around the stator core 2. In the coil portion forming step P1, the L circumferential coil portion 32L and the M circumferential coil portion 32M are alternately connected in series by K (two in this example) according to the number of slots per phase per pole. .

  In the present embodiment, a plurality (16 in total) of coil portions 32 of each phase coil (here, U-phase coil 3U) have the number of magnetic poles by the number (two) corresponding to the number of slots per phase per phase. The group is divided into a corresponding number (eight) of groups G (G1 to G8). In the present embodiment, each group G includes only the coil portions 32 having the same number of turns. Moreover, between the groups G adjacent to each other in the circumferential direction C, the number of turns of the coil portion 32 included in each group G is different. In this example, the groups G1, G3, G5, and G7 include only the L-wrapped coil portion 32L, and the groups G2, G4, G6, and G8 include only the M-wrapped coil portion 32M. The connection between the coil portions 32 in each group G and the connection between the coil portions 32 between the groups G are both realized on the first axial direction L1 side with respect to the conductor side portion 33.

  Here, of the two coil portions 32 in each group G, the coil portion 32 disposed on the second circumferential direction C2 side is referred to as a “first coil portion group”. The first coil portion group is represented as an L-circular coil portion 32L (hereinafter referred to as “L-circular coil portion 32L (a)”) denoted by the symbol (a); the same applies to the other L-circular coil portions 32L. ), L circumferential coil portion 32L (e), (i), (m), and M circumferential coil portion 32M (hereinafter referred to as “M circumferential coil portion 32M (c)”). The same applies to the other M-wrapped coil portion 32M), and the M-wrapped coil portion 32M, (g), (k), (o). On the other hand, of the two coil portions 32 in each group G, the coil portion 32 disposed on the circumferential first direction C1 side is referred to as a “second coil portion group”. The second coil portion group includes L-wrapped coil portions 32L (b), (f), (j), (n) and M-wrapped coil portions 32M (d), (h), (l), (p ).

  In the present embodiment, the arrangement order of the L-wrapped coil portion 32L and the M-wrapped coil portion 32M starting from the group G1 in the circumferential direction C is the same in the first coil portion group and the second coil portion group. Yes. That is, in each of the first coil portion group and the second coil portion group, the group G1 includes the L-wrapped coil portion 32L, the group G2 includes the M-wrapped coil portion 32M, and this relationship is sequentially repeated. Yes.

  As shown in FIGS. 3 and 4, each coil portion 32 includes a first end portion 35 that is one end along the direction of current flowing through the U-phase coil 3 </ b> U (the extending direction of the linear conductor 31), and the other end. And a second end 36 which is an end. For example, each coil portion 32 is connected to the power line (power source) side at the first end portion 35 and connected to the neutral point side at the second end portion 36. In the present embodiment, each coil portion 32 is an integer winding (L winding or M winding), and none of them has a fractional winding, so the first end portion 35 and the second end portion of each coil portion 32. 36 is arrange | positioned with respect to the some conductor side part 33 at the same side of the axial direction L (this example axial 1st direction L1 side).

  In the present embodiment, each group G includes only the coil portion 32 in the same circumferential direction. Further, between the groups G adjacent in the circumferential direction C, the circumferential directions of the coil portions 32 included in the groups G are opposite to each other. Thereby, between the coil parts 32 in the corresponding position of a pair of groups G arranged adjacent to each other in the circumferential direction C, the circumferential directions of the linear conductors 31 are opposite to each other. Here, “at a position corresponding to a pair of groups G” means that the positions in the arrangement order in the circumferential direction C within each group G are equal to each other.

  For example, among the two coil portions 32 in each of the groups G1 and G2, the L-wrapped coil portion 32L (a) and the M-wrapped coil portion 32M (c), which are the coil portions 32 arranged on the second circumferential direction C2 side. ). Then, as shown in FIG. 3, the L-circular coil portion 32L (a) circulates counterclockwise as viewed from the second circumferential direction C2, while the M-circular coil portion 32M (c) Contrary to this, it circulates clockwise as seen from the circumferential second direction C2. In addition, an L-wrapped coil portion 32L (b) and an M-wrapped coil portion 32M (d), which are the coil portions 32 arranged on the circumferential first direction C1 side of the two coil portions 32 in each of the groups G1 and G2. ). Then, the relationship between these is the same as the above-described relationship between the L-wrapped coil portion 32L (a) and the M-wrapped coil portion 32M (c).

  In the schematic diagram in the lower part of FIG. 4, when considering a circumferential direction from the first end 35 toward the second end 36 along the linear conductor 31, the first axial direction L1 side to the second axial direction L2 side. On the contrary, hatching is applied to the conductor side 33 having directionality toward the axial first direction L1 side from the second axial direction L2 side. Not shown. In FIG. 4 and the like, the numbers “1” to “40” given to the conductor side portions 33 are identification numbers for distinguishing the circulation order of the linear conductors 31, and a pair with the same number attached thereto. The conductor side portion 33 constitutes one turn of the linear conductor 31.

  In coil part formation process P1, the phase coil formed as mentioned above is each prepared for three phases.

1-2-2. Coil Part Arrangement Step The coil part arrangement step P2 is a step of partially arranging the plurality of coil portions 32 in the slots 22 respectively. As shown in FIGS. 5 and 6, the coil part arranging step P <b> 2 is performed in a state where the processing jig 51 is arranged on the second radial direction R <b> 2 side of the stator core 2. On the surface of the processing jig 51 on the first radial direction R1 side, the same number of grooves 52 in the radial direction R as the number of slots 22 are formed. In the coil part arranging step P2, a plurality of coil parts 32 are arranged across the slot 22 and the groove part 52 facing each other in the radial direction R. The numbers (1), (2), (7), (8),..., (43), (44) given adjacent to each slot 22 in FIG. This corresponds to the order of arrangement in the circumferential direction C of the stator core 2. In FIG. 6, only the U-phase slot 22 is displayed, and the display of the other-phase slot 22 is omitted.

  In the coil part arranging step P2, the even number of conductor side parts 33 of each coil part 32 are divided into a first conductor side part set 41 and a second conductor side part set 42 in half. The first conductor side part group 41 and the second conductor side part group 42 are each configured as a group of L (three in this example) conductor side parts 33 in the L circumferential coil part 32L, and the M circumferential coil part 32M is configured as a set of M (two in this example) conductor side portions 33. That is, for each L-wrapped coil portion 32L, one of the pair of L conductor side portions 33 is a first conductor side set 41 for the L-wrapped coil portion 32L. The other is the second conductor side group 42 for the L circumferential coil portion 32L. Similarly, for each M-wrapped coil portion 32M, one of the pair of M conductor side portions 33 is set as the first conductor side portion set 41 for the M-wrapped coil portion 32M. The other is the second conductor side group 42 for the M circumferential coil portion 32M.

  As can be understood from FIG. 6 and the like, in each of the L circumferential coil portions 32L, the L conductor side portions 33 constituting the first conductor side portion set 41 have the same direction of current flowing through each of the L conductor side portion groups 41. The L conductor side portions 33 constituting the two-conductor side portion set 42 also have the same direction of current flowing through each of them. Similarly, in each M winding coil part 32M, the M conductor side parts 33 constituting the first conductor side part set 41 have the same direction of current flowing through each of the M conductor side part sets 41, and the second conductor side part set 42 The M conductor side portions 33 constituting the same direction of current flowing through each of them are also the same.

  In the coil portion arranging step P2, the first conductor side set 41 in each of the L circumferential coil portion 32L and the M circumferential winding coil portion 32M is inserted into the slot 22, and the second conductor side group 42 is inserted into the slot 22. All the L-wrapped coil portions 32L and all the M-wrapped coil portions 32M are arranged so as not to be inserted. The second conductor side group 42 that is not inserted into the slot 22 is inserted into the groove 52 of the processing jig 51. Each L-circular coil portion 32L and each M-circular coil portion 32M are inserted along the axial direction L with respect to the slot 22 and the groove portion 52.

  In this embodiment, for each slot 22 for each phase, two L-wrapped coil portions 32L or two M-wrapped coil portions 32M are arranged in two slots 22 adjacent to each other in the circumferential direction C. These two L-wrapped coil portions 32L and two M-wrapped coil portions 32M are alternately arranged. At this time, the second conductor of the coil part 32 in the corresponding position between the first conductor side set 41 of the coil part 32 in the corresponding position of the pair of groups G arranged adjacent to each other in the circumferential direction C. The direction of the electric current which flows through the conductor side part 33 between the side part groups 42 becomes a mutually reverse direction.

  In the coil portion arranging step P2, the phase coils for the three phases formed in the coil portion forming step P1 are each provided with the number of slot pitches (two slot pitches) corresponding to the number of slots per phase per pole in the above-described manner. Arrange them one by one while shifting them one by one.

1-2-3. Coil Portion Deformation Step The coil portion deformation step P3 is a step of deforming the plurality of coil portions 32. As shown in FIG. 7, in the coil part deformation process P <b> 3, the stator core 2 and the processing jig 51 are relatively rotated about the axis X. Thereby, the first conductor side part set 41 and the second conductor side part set 42 in each of the L circumferential coil part 32L and the M circumferential coil part 32M are collectively moved relative to each other in the circumferential direction C. All the L winding coils 32L and all the M winding coils 32M of the phase coil are deformed collectively. The relative rotation angle at this time is 45 ° (electrical angle “π”), and the relative movement distance is 6 slot pitches (one magnetic pole pitch) (see FIGS. 5 and 7).

  As a result, as shown in FIG. 8, L circumferentially wound coil portions 32L (a), (b), (e), (f), (i), (j), (m), (n) In the groove portion 52 facing the slot 22 in which the first conductor side portion group 41 composed of the conductor side portions 33 is disposed, the M circumferential coil portions 32M (o), (p), (c), (d), ( The second conductor side part sets 42 each including the M conductor side parts 33 of g), (h), (k), and (l) are arranged. In addition, the M winding coil portion 32M (c), (d), (g), (h), (k), (l), (o), (p) is composed of M conductor side portions 33. In the groove portion 52 facing the slot 22 in which the one conductor side group 41 is disposed, the L circumferential coil portion 32L (a), (b), (e), (f), (i), (j), ( m) and (n) second conductor side portion groups 42 each including the L conductor side portions 33 are arranged.

1-2-4. Coil Part Insertion Process The coil part insertion process P4 is a process of pushing out and inserting the plurality of coil parts 32 after the deformation in the coil part deformation process P3 into the slots 22. In the coil part insertion step P4, a plate-like pushing member configured to be movable back and forth along the radial direction R from the groove part 52 is projected radially toward the first radial direction R1 side. As a result, as shown in FIGS. 9 and 10, the second conductor side assembly that has not been inserted into the slot 22 (inserted into the groove 52) in the coil arrangement process P <b> 2 and the coil deformation process P <b> 3. 42 are collectively inserted into the slot 22.

  As a result, as shown in FIG. 10, L windings 32L (a), (b), (e), (f), (i), (j), (m), (n) are provided. The first conductor side portion set 41 including the conductor side portions 33 is arranged in the radial first direction R1 side portion of each slot 22, and the M-wrapped coil portion 32M ( o), (p), (c), (d), (g), (h), (k), and (l), the second conductor side part sets 42 including the M conductor side parts 33 are arranged, respectively. Is done. In addition, the M winding coil portion 32M (c), (d), (g), (h), (k), (l), (o), (p) is composed of M conductor side portions 33. One conductor side group 41 is arranged in the radial first direction R1 side portion of each slot 22, and the L circumferential coil portion 32L (a), (b), ( A second conductor side group 42 composed of L conductor side parts 33 of e), (f), (i), (j), (m), and (n) is arranged.

  In addition, when the radial direction R position from the radial first direction R1 side of the conductor side portion 33 in each slot 22 is represented by “layer”, and “L> M”, the first layer of each slot 22 To the Mth layer (in this example, the first layer and the second layer) of the conductor side portions 33 constituting the first conductor side portion set 41 of the L circumferential coil portion 32L or the M circumferential coil portion 32M. M (two in this example) are arranged. In the (L + 1) th layer to the (L + M) layer (the fourth layer and the fifth layer in this example) of each slot 22, the second conductor side group of the L circumferential coil portion 32L or the M circumferential coil portion 32M M of the conductor side portions 33 constituting 42 are arranged. In the (M + 1) th layer to the Lth layer (the third layer in this example) of each slot 22, conductors constituting the first conductor side group 41 of the L circumferential coil portion 32 </ b> L are provided for each phase coil of each phase. (LM) of the side portions 33 (one in this example) and (LM) of the conductor side portions 33 constituting the second conductor side portion set 42 of the L circumferential coil portion 32L. The books are alternately arranged in K pieces. The case of “L <M” can be considered in the same manner, but detailed description thereof is omitted here.

  In this way, the first conductor side set 41 of the first coil portion which is one of the plurality of L-circular coil portions 32L has the first diameter of the first slot of the plurality of slots 22. The second conductor side set 42 is disposed in the radial second direction R2 side portion of the second slot among the plurality of slots 22 and is disposed in the direction R1 side portion. Furthermore, the first conductor side portion set 41 of the second coil portion, which is one of the plurality of M-circular coil portions 32M, is arranged on the first slot R1 side portion of the second slot, The two-conductor side portion set 42 is disposed on the radial second direction R2 side portion of the third slot among the plurality of slots 22. The above is sequentially repeated over the entire region in the circumferential direction C for each phase coil.

  Thereby, in each of all the slots 22 with which the stator core 2 is equipped, the 1st conductor edge part group 41 or the 2nd conductor edge part group 42 of any one L circumference coil part 32L, and any one Together with the second conductor side group 42 or the first conductor side group 41 of the M-wrapped coil part 32M, (L + M) (5 in this example) conductor side parts 33 are arranged. According to the method for manufacturing the stator 1 as described above, the number of the conductor side portions 33 arranged in the radial direction R in each slot 22 can be easily set to an odd number. At this time, the even number of conductor side parts 33 of each coil part 32 are divided into a first conductor side part set 41 and a second conductor side part set 42 in which the current directions in the slots 22 are the same. , Arranged in a pair of slots 22. The (L + M) conductor side portions 33 arranged side by side in the radial direction R in the same slot 22 have the same direction of the flowing current.

  Thereafter, the phase coils of each phase are connected to each other at a neutral point and are also connected to a power line (power source) (not shown). As described above, the odd-numbered (odd-turn) coil 3 can be appropriately configured.

2. Second Embodiment A second embodiment of an armature for a rotating electrical machine and a method for manufacturing the same according to the present invention will be described with reference to the drawings. In the present embodiment, the specific connection mode when the L circumference coil portion 32L and the M circumference winding coil portion 32M are alternately connected in series in K (two in this example) in the coil portion formation step P1 is as follows. This is different from the first embodiment. In the following, items relating mainly to the differences will be described. Note that the points not particularly specified are the same as those in the first embodiment.

2-1. Coil Part Forming Step In the coil part forming step P1, the L-wrapped coil part 32L and the M-wrapped coil part 32M are formed by rotating the linear conductor 31 L times or M times as shown in FIG. In the present embodiment, each group G includes both the L-circular coil portion 32L and the M-circular coil portion 32M. In addition, between the groups G adjacent to each other in the circumferential direction C, the positional relationship in the circumferential direction C in each group G of the L circumferential coil portion 32L and the M circumferential coil portion 32M included in each of the groups is reversed. . In this example, in the groups G1, G3, G5, and G7, the L-wrapped coil portion 32L and the M-wrapped coil portion 32M are arranged in this order from the circumferential second direction C2 side toward the circumferential first direction C1 side. Connected. On the other hand, in the groups G2, G4, G6, and G8, on the contrary, the M-wrapped coil portion 32M and the L-wrapped coil portion 32L are moved from the second circumferential direction C2 side toward the first circumferential direction C1 side. They are connected in order. In this embodiment as well, the L-wrapped coil portion 32L and the M-wrapped coil portion 32M straddle two groups G, respectively, and K (2 in this example) according to the number of slots per pole / phase. Are alternately connected in series.

  In the present embodiment, the arrangement order of the L-wrapped coil portion 32L and the M-wrapped coil portion 32M starting from the group G1 in the circumferential direction C differs between the first coil portion group and the second coil portion group. . That is, when the group G1 is considered as a starting point, the L coil portion 32L and the M coil portion 32M are repeatedly arranged in this order in the first coil portion group, whereas the second coil portion In the group, the M-wrapped coil portion 32M and the L-wrapped coil portion 32L are repeatedly arranged in this order. In the present embodiment, the winding directions of the linear conductors 31 are opposite to each other between the coil portions 32 at the corresponding positions of the pair of groups G arranged adjacent to each other in the circumferential direction C.

2-2. Coil Part Arrangement Step In the coil part arrangement step P2, the L-circular coil part 32L and the M-circular coil part 32M are partially arranged in the slot 22, respectively. Also in this embodiment, the first conductor side group 41 in each of the L-circumference coil part 32L and the M-circumference coil part 32M is inserted into the slot 22, and the second conductor side group 42 is not inserted into the slot 22. All the L-wrapped coil portions 32L and all the M-wrapped coil portions 32M are arranged so as to be in the state.

  As shown in FIG. 12, in this embodiment, for each slot 22 for each phase, an L circumferential coil portion 32L and an M circumferential coil portion 32M are provided in two slots 22 adjacent to each other in the circumferential direction C. One by one. And the group of the one L winding coil part 32L and the one M winding coil part 32M is arrange | positioned alternately, reversing the arrangement | sequence order of the circumferential direction C. FIG. At this time, also in this embodiment, between the first conductor side part groups 41 of the coil part 32 in the corresponding position of the pair of groups G arranged adjacent to each other in the circumferential direction C, and the coil part in the corresponding position The directions of the currents flowing through the conductor side portions 33 are opposite to each other between the 32 second conductor side portion sets 42.

2-3. Coil part deformation | transformation process In coil part deformation | transformation process P3, the L circumference coil part 32L and the M circumference coil part 32M are deformed. As shown in FIG. 13, the first conductor side group 41 and the second conductor side group 42 in each of the L circumferential coil part 32L and the M circumferential coil part 32M are relatively moved together in the circumferential direction C. Thus, all the L-wrapped coil portions 32L and all the M-wrapped coil portions 32M of all the phase coils are deformed collectively.

2-4. Coil Part Insertion Step In the coil part insertion step P4, the deformed L-circular coil part 32L and M-circular coil part 32M are pushed out in the radial direction R and inserted into the slot 22. As shown in FIG. 14, the second conductor side group 42 that has not been inserted into the slot 22 (inserted into the groove 52) in the coil part arranging step P <b> 2 and the coil part deforming step P <b> 3 is collectively collected. Insert into slot 22.

  As a result, in the present embodiment, with respect to the first coil portion group, the first conductor composed of L conductor side portions 33 of the L circumferential coil portions 32L (a), (e), (i), (m). A side group 41 is arranged on the radial first direction R1 side portion of each slot 22, and the M-wrapped coil portions 32M (o), (c), (g) are arranged on the radial second direction R2 side portion of each slot 22. , (K), the second conductor side set 42 including the M conductor side parts 33 is arranged. In addition, the first conductor side part set 41 including the M conductor side parts 33 of the M circumferential coil parts 32M (c), (g), (k), and (o) is the first radial direction R1 of each slot 22. It is arranged on the side portion, and comprises L conductor side portions 33 of L circumferential coil portions 32L (a), (e), (i), (m) on the radial second direction R2 side portion of each slot 22. The second conductor side part sets 42 are respectively arranged.

  As for the second coil part group, the first conductor side group 41 including L conductor side parts 33 of the L circumferential coil parts 32L (d), (h), (l), (p) The slots 22 are arranged in the first radial direction R1 side portion of the slot 22, and in the second radial direction R2 side portion of each slot 22, the M winding coils 32M (b), (f), (j), (n) M A second conductor side portion group 42 including the two conductor side portions 33 is disposed. In addition, the first conductor side portion group 41 including the M conductor side portions 33 of the M circumferential coil portions 32M (f), (j), (n), and (b) is the first radial direction R1 of each slot 22. It is arranged on the side portion, and comprises L conductor side portions 33 of L circumferential coil portions 32L (d), (h), (l), (p) on the radial second direction R2 side portion of each slot 22. The second conductor side part sets 42 are respectively arranged.

  In this way, the first conductor side set 41 of the first coil portion which is one of the plurality of L-circular coil portions 32L has the first diameter of the first slot of the plurality of slots 22. The second conductor side set 42 is disposed in the radial second direction R2 side portion of the second slot among the plurality of slots 22 and is disposed in the direction R1 side portion. Furthermore, the first conductor side portion set 41 of the second coil portion, which is one of the plurality of M-circular coil portions 32M, is arranged on the first slot R1 side portion of the second slot, The two-conductor side portion set 42 is disposed on the radial second direction R2 side portion of the third slot among the plurality of slots 22. The above is sequentially repeated over the entire region in the circumferential direction C for each phase coil.

  Thereby, in each of all the slots 22 with which the stator core 2 is equipped, the 1st conductor edge part group 41 or the 2nd conductor edge part group 42 of any one L circumference coil part 32L, and any one The (L + M) (5 in this example) conductor sides 33 in which the direction of the flowing current is aligned by combining the second conductor side set 42 or the first conductor side set 41 of the M circumferential coil portion 32M. Is placed. Also by the manufacturing method according to the present embodiment, the number of conductor side portions 33 arranged in the radial direction R in each slot 22 can be easily set to an odd number.

3. Other Embodiments Finally, other embodiments of the armature for a rotating electrical machine and the method for manufacturing the same according to the present invention will be described. Note that the configurations disclosed in the following embodiments can be applied in combination with the configurations disclosed in other embodiments as long as no contradiction arises.

(1) In each of the above embodiments, the configuration in which K, which is the number of slots per pole and phase, is “2” has been described as an example. However, the embodiment of the present invention is not limited to this. That is, the number of slots per phase per pole may be, for example, “3”, “4”, or “1”, “5” or more. In short, K, which is the number of slots per pole per phase, can be any natural number. In this case, in the coil part formation process P1, according to the setting of K, the L circumference coil part 32L and the M circumference coil part 32M are alternately connected in series by K pieces.

(2) In each of the above-described embodiments, L is set to “3” and each L-wrapped coil portion 32L is rotated three times, and M is set to “2” so that each M-wrapped coil portion 32M is The configuration in which the two conductor sides 33 are arranged in each of all the slots 22 has been described as an example. However, the embodiment of the present invention is not limited to this. That is, L can be any odd number greater than or equal to “1”, and M can be any even number greater than or equal to “2”. In this case, the relationship between L and M is not limited to “LM = 1”, but “LM = −1”, “LM = ± 3”, “LM = ± 5”. Etc. Even in this case, according to the settings of L and M, (L + M) conductor side portions 33 in which the directions of the flowing currents are aligned are arranged in all the slots 22 included in the stator core 2. become.

(3) In each of the above embodiments, the number of magnetic poles of the rotor as the field is set to “8”, and the plurality of coil portions 32 of the phase coil of each phase are divided into eight groups G according to the number of magnetic poles. The configuration has been described as an example. However, the embodiment of the present invention is not limited to this. That is, the number of magnetic poles can be an arbitrary even number, and can be “2”, “4”, “6”, or “10” or more. At this time, the plurality of coil portions 32 of the phase coils of each phase are divided into a number of groups G corresponding to the number of magnetic poles.

  In addition, when the number of magnetic poles is “2” and the plurality of coil portions 32 of the phase coils of each phase are divided into any one of the two groups G, one of the plurality of L circumferential coil portions 32L. The first conductor side set 41 of the first coil portion is arranged at the first slot radial first side R1 side portion of the plurality of slots 22, and the second conductor side set 42 is a plurality of the second conductor side set 42. Of the slots 22, the second slots are arranged in the radial second direction R 2 side portion. Furthermore, the first conductor side portion set 41 of the second coil portion, which is one of the plurality of M-circular coil portions 32M, is arranged on the first slot R1 side portion of the second slot, The two-conductor side portion set 42 is arranged on the radial second direction R2 side portion of the first slot.

(4) In each of the above embodiments, each coil part 32 (L circumferential coil part 32L, M circumferential coil part 32M) is a spiral that circulates without the linear conductor 31 intersecting when viewed from the circumferential direction C. The configuration formed in the shape has been described as an example. However, the embodiment of the present invention is not limited to this. That is, if the directions of the currents flowing through the plurality of conductor side portions 33 are aligned in at least the first conductor side portion set 41 and the second conductor side portion set 42, the linear conductors 31 constituting each coil portion 32 are A configuration may be adopted in which a part of them intersects when viewed from the circumferential direction C.

(5) In the above embodiments, the stator 1 for a rotating electrical machine driven by three-phase alternating current is taken as an example, and the configuration in which the coil 3 includes three phase coils has been described as an example. However, the embodiment of the present invention is not limited to this. That is, the number of phase coils included in the coil 3 can be “1”, “2”, or “4” or more.

(6) In each of the above embodiments, the inner rotor type rotating electrical machine stator 1 has been described as an example. However, the application target of the present invention is not limited to this. That is, the present invention can also be applied to the stator 1 for an outer rotor type rotating electrical machine.

(7) Regarding other configurations as well, the embodiments disclosed herein are illustrative in all respects, and the embodiments of the present invention are not limited thereto. In other words, configurations that are not described in the claims of the present application can be modified as appropriate without departing from the object of the present invention.

  The present invention provides a rotation including an armature core in which 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 coil wound around the armature core It can utilize suitably for the armature for armatures, and its manufacturing method.

1 Stator (armature for rotating electrical machine)
2 Stator core (armature core)
3 coil 21 core reference surface 22 slot 31 linear conductor 32 coil part 32L L circumferential coil part 32M M circumferential coil part 33 conductor side part 41 first conductor side part group 42 second conductor side part group L axial direction R diameter Direction R1 Diameter first direction R2 Diameter second direction C Circumferential direction P1 Coil part formation process P2 Coil part arrangement process P3 Coil part deformation process P4 Coil part insertion process

Claims (4)

A rotating electrical machine comprising: an armature core in which 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 coil wound around the armature core Armature,
The armature core has K slots (K represents a natural number) per phase per pole,
The coil has an L-wrapped coil portion that is obtained by turning one linear conductor L times (L represents an odd number of 1 or more) and M times (M is an even number of 2 or more). And a continuous M number of L-wrapped coil portions and a continuous number of the L-wrapped coil portions and a continuous number of the M-wrapped coil portions.
Each of the L-wrapped coil portion and the M-wrapped coil portion includes an even number of conductor side portions that are portions disposed in the slot, and each half of the even number of the conductor side portions is the The first conductor side group and the second conductor side group, which are a pair of conductor side groups each having the same direction of current in the slot, are arranged in the pair of slots,
One radial direction side of the core reference surface is the first radial direction, the other radial direction is the second radial direction,
The first conductor side portion set of the first coil portion that is one of the plurality of L-circular coil portions is disposed on the first radial direction side portion of the first slot of the plurality of slots. Arranged,
The second conductor side portion set of the first coil portion is disposed on the second radial side portion of the second slot of the plurality of slots;
The first conductor side portion set of the second coil portion that is one of the plurality of M-circular coil portions is disposed in the first radial direction side portion of the second slot,
The second conductor side portion set of the second coil portion is disposed in a second radial side portion of the third slot or the first slot of the plurality of slots,
In each of all the slots provided in the armature core, the conductor side set of any one of the L-wrapped coil portions and the conductor side set of any one of the M-wrapped coil portions And (L + M) armatures for rotating electrical machines in which the conductor side portions are arranged.   Regarding the L-wrapped coil portion and the M-wrapped coil portion in which the conductor side portion group is disposed in the same slot, the winding direction of the linear conductor constituting the L-wrapped coil portion and the M-wrapped winding The armature for a rotating electrical machine according to claim 1, wherein the circumferential directions of the linear conductors constituting the coil part are opposite to each other.   Each of the said L surrounding coil part and the said M surrounding coil part is formed in the spiral shape which turns around without seeing the linear conductor which comprises these coil parts seeing in the said circumferential direction. The armature for rotary electric machines according to 1 or 2. An armature core in which 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 coil wound around the armature core, the armature core Is a manufacturing method of an armature for a rotating electrical machine having K slots (K represents a natural number) per phase per pole,
An L-wrapped coil portion obtained by turning a linear conductor L times (L represents an odd number of 1 or more) and an M-wrapped coil obtained by turning a linear conductor M times (M represents an even number of 2 or more) A coil part forming step of forming K parts alternately so as to connect K parts,
Of the linear conductors in each of the L-wrapped coil portion and the M-wrapped coil portion, the conductor side portions, which are portions arranged in the slot, are halved, and the current direction in the slot is the same. Divided into a first conductor side set and a second conductor side set, which are a pair of conductor side sets, and the first conductor side set in each of the L circumferential coil portion and the M circumferential coil portion And all the L-wrapped coils so that one of the second conductor side group is inserted into the slot and the other of the first conductor side group and the second conductor side group is not inserted. A coil part arranging step of arranging the part and all the M-wrapped coil parts;
The first conductor side group and the second conductor side group in each of the L circumferential coil part and the M circumferential coil part are collectively moved relative to each other in the circumferential direction to deform the coil part. Coil part deformation process;
After the coil part deforming step, a coil part inserting step of inserting the conductor side portion set that has not been inserted in the coil portion arranging step into the slot by moving in the radial direction of the core reference surface;
The manufacturing method of the armature for rotary electric machines provided with.

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