JP5911018B2 - Armature and rotating electric machine equipped with the armature - Google Patents

Description

  The present invention relates to a rotating electric machine such as an electric motor or a generator and an armature used therefor, and particularly to an iron core structure of the armature.

  Generally, an armature of a rotating electric machine is formed between an armature core and teeth adjacent to each other with teeth protruding inward from the inner peripheral surface of a cylindrical yoke portion and arranged at a predetermined pitch in the circumferential direction. And an annular armature winding disposed in the armature core and mounted on the armature core. Therefore, the work of mounting the armature winding on the armature core becomes complicated, and it is difficult to arrange the conductor wires of the armature winding in the slot at high density.

  For this reason, armature windings are mounted on a rectangular parallelepiped laminated core, and the ends of the laminated cores bent into an annular shape are bent with the side where the armature winding of the laminated core is attached inside A conventional armature for a rotating electric machine has been proposed in which the armature windings can be easily integrated and the conductor wire can be arranged with high density in the slot (for example, Patent Document 1). reference).

  In recent years, in a rotating electrical machine, high output is desired, and it is necessary to flow a large current through the armature winding, and a conductor wire having a large diameter is used as a conductor wire of the armature winding. However, in the armature of the conventional rotating electric machine described in Patent Document 1, a rectangular parallelepiped laminated iron core on which armature windings composed of thick conductor wires are mounted is bent into an annular shape. It becomes difficult to form the armature core of the armature, and the shape of the armature winding collapses, resulting in a problem that the performance deteriorates.

  In view of such a situation, the outer circumference of the armature winding formed by winding the iron core block composed of the arc-shaped yoke portion and one tooth projecting inwardly from the inner peripheral surface of the yoke portion in a ring shape in advance. It has been proposed to produce an armature of a rotating electrical machine by inserting teeth from the side and arranging them in an annular shape (see, for example, Patent Document 2).

JP 09-103052 A Japanese Patent No. 3604326

  However, in the armature of the conventional rotating electrical machine described in Patent Document 2, the step of bending the rectangular parallelepiped laminated iron core with the armature windings attached thereto can be omitted, but as the number of slots increases, Since the number of iron core blocks increases, the number of parts increases, and there is a problem that the manufacturing cost increases because it takes time and labor during transportation and handling.

  The present invention has been made to solve the above-mentioned problems, and devised the structure of the iron core block to suppress the increase in the number of iron core blocks accompanying the increase in the number of slots, thereby saving the labor of transportation and handling during manufacturing. An object of the present invention is to obtain an armature capable of suppressing an increase in manufacturing cost and a rotating electric machine including the armature.

  An armature according to the present invention is an electric machine in which teeth extend radially inward from an inner peripheral wall surface of an annular iron core back yoke and are arranged at a predetermined pitch in the circumferential direction, and slots are formed between adjacent teeth. And a winding assembly that is inserted into a slot of the armature core and attached to the armature core. The armature core is configured by arranging a plurality of core blocks in the circumferential direction, and the core block includes a large core back yoke portion having an arcuate cross section and a radial direction from an inner peripheral wall surface of the large core back yoke portion. One two-tooth iron core having two teeth extending inwardly, one on each side in the circumferential direction of the two-tooth iron core, and a small iron core back yoke portion having an arc-shaped cross section, And 1 teeth iron core having one tooth extending radially inward from the inner peripheral wall surface of the small iron core back yoke portion, the 2 teeth iron core and the two 1 teeth iron cores, The outer peripheral portions of the large iron core back yoke portion and the small iron core back yoke portion are connected by a thin-walled portion that can be bent, and are continuously connected.

  According to this invention, the two teeth iron core and the two one teeth iron cores constituting the iron core block are connected by the thin-walled portion that can bend the outer peripheral portions of the large iron core back yoke portion and the small iron core back yoke portion. Since it is connected to, 1 teeth iron core can be opened and closed for 2 teeth iron core. As a result, the iron core block can be mounted from the outer peripheral side while avoiding interference between the one-tooth iron core and the winding assembly with respect to the winding assembly that is previously wound in an annular shape. Therefore, an increase in the number of iron core blocks accompanying an increase in the number of slots can be suppressed, and labor and time for transportation and handling during manufacturing can be saved, and manufacturing costs can be reduced.

It is a half sectional view which shows the rotary electric machine which concerns on Embodiment 1 of this invention. It is a perspective view explaining the structure of the rotary electric machine which concerns on Embodiment 1 of this invention. It is a perspective view which shows the stator applied to the rotary electric machine which concerns on Embodiment 1 of this invention. It is a perspective view which shows the iron core block which comprises the stator iron core applied to the rotary electric machine which concerns on Embodiment 1 of this invention. It is a perspective view which shows the winding assembly of the stator applied to the rotary electric machine which concerns on Embodiment 1 of this invention. It is a perspective view which shows the coil | winding body which comprises the coil | winding assembly in the rotary electric machine which concerns on Embodiment 1 of this invention. It is sectional drawing which cut | disconnected the winding body which comprises the coil | winding assembly in the rotary electric machine which concerns on Embodiment 1 of this invention by the plane orthogonal to the length direction of the 1st and 2nd linear part. It is a figure explaining the assembly method of the stator in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a figure explaining the assembly method of the stator in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a figure explaining the assembly method of the stator in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a figure explaining the assembly method of the stator in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a top view which shows the core block which comprises the stator core applied to the rotary electric machine which concerns on Embodiment 2 of this invention. It is a figure explaining the assembly method of the stator in the rotary electric machine which concerns on Embodiment 2 of this invention. It is a figure explaining the assembly method of the stator in the rotary electric machine which concerns on Embodiment 2 of this invention. It is a figure explaining the assembly method of the stator in the rotary electric machine which concerns on Embodiment 2 of this invention. It is a top view which shows the state before comprising the 2 teeth iron core of the iron core block which comprises the stator iron core applied to the rotary electric machine which concerns on Embodiment 3 of this invention. It is a top view which shows the core block which comprises the stator core applied to the rotary electric machine which concerns on Embodiment 3 of this invention. It is a top view explaining the manufacturing method of the core block which comprises the stator core applied to the rotary electric machine which concerns on Embodiment 3 of this invention. It is a top view which shows the iron core block which comprises the stator core applied to the rotary electric machine which concerns on Embodiment 4 of this invention. It is a figure explaining the assembly method of the stator in the rotary electric machine which concerns on Embodiment 4 of this invention. It is a figure explaining the assembly method of the stator in the rotary electric machine which concerns on Embodiment 4 of this invention.

  Hereinafter, preferred embodiments of an armature and a rotating electric machine according to the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
1 is a side sectional view showing a rotating electrical machine according to Embodiment 1 of the present invention, FIG. 2 is a perspective view illustrating the configuration of the rotating electrical machine according to Embodiment 1 of the present invention, and FIG. 3 is an embodiment of the present invention. FIG. 4 is a perspective view showing a stator block applied to the rotary electric machine according to Embodiment 1 of the present invention, and FIG. 5 is a perspective view showing an iron core block constituting the stator core applied to the rotary electric machine according to Embodiment 1 of the present invention. FIG. 6 is a perspective view showing a stator winding assembly applied to the rotating electrical machine according to Embodiment 1 of the present invention, and FIG. 6 shows windings constituting the winding assembly in the rotating electrical machine according to Embodiment 1 of the present invention. FIG. 7 is a cross-sectional view of the winding body constituting the winding assembly in the rotary electric machine according to Embodiment 1 of the present invention, taken along a plane orthogonal to the length direction of the first and second linear portions. FIG.

  1 and 2, the rotating electrical machine 100 includes a housing 1 having a bottomed cylindrical frame 2 and an end plate 3 that closes an opening of the frame 2, and is housed in the frame 2 and fixed to a cylindrical portion of the frame 2. A stator 10 as an armature and a rotary shaft 6 rotatably supported on the bottom of the frame 2 and the end plate 3 via a bearing 4 are arranged rotatably on the inner peripheral side of the stator 10. The rotor 5 is provided, and operates as an 8-pole 48-slot inner rotor type electric motor or generator.

  The rotor 5 has a rotor core 7 fixed to the rotary shaft 6 that penetrates the shaft center position, and is embedded in the outer peripheral surface side of the rotor core 7 and arranged at a predetermined pitch in the circumferential direction to constitute a magnetic pole. A permanent magnet type rotor including a permanent magnet 8. The rotor 5 is not limited to a permanent magnet type rotor, and a squirrel-cage rotor in which a non-insulated rotor conductor is housed in a slot of a rotor core and both sides are short-circuited by a short-circuit ring, or an insulated conductor. You may use the winding-type rotor which attached the wire to the slot of the rotor core.

  Next, the configuration of the stator 10 will be specifically described with reference to FIGS.

  As shown in FIG. 3, the stator 10 includes a stator core 11 as an armature core, a winding assembly 21 mounted on the stator core 11, and a stator core 11 mounted in a slot 16. And a slot cell 25 that insulates the winding assembly 21.

  As shown in FIG. 4, each of the iron core blocks 12 is manufactured by laminating and integrating a predetermined number of electromagnetic steel sheets, and has a large iron core back yoke portion 13a having an arc cross section and an inner periphery of the large iron core back yoke portion 13a. Two teeth iron core 13 provided with two teeth 13b formed so as to extend radially inward from the wall surface, small iron core back yoke portion 14a having a circular arc cross section, and inner peripheral wall surface of small iron core back yoke portion 14a One tooth 14b formed so as to extend radially inward from each other, and two one-tooth cores 14 disposed on both sides in the circumferential direction of the two-tooth core 13 are provided. The two one-tooth cores 14 are connected to the outer peripheral portion of the small core back yoke portion 14a by the thin-walled portion 15 that can be bent to the outer peripheral portion of the large core back yoke portion 13a. The thin-walled portion 15 is continuously connected to be opened and closed.

  Then, the stator core 11 has twelve core blocks 12 facing each other with the teeth 13b and 14b facing inward in the radial direction, but with the side surfaces in the circumferential direction of the large iron core back yoke portion 13a and the small iron core back yoke portion 14a facing each other. It is arranged in the circumferential direction and is formed in an annular shape. The small iron core back yoke portion 14a has a shape obtained by dividing the large iron core back yoke portion 13a into two equal parts in the circumferential direction, and the teeth 13b and 14b are formed in the same shape. Therefore, 48 slots 16 formed between the teeth 13b and 14b adjacent in the circumferential direction are opened on the inner circumferential side, and 48 slots are arranged at an equiangular pitch in the circumferential direction. Further, the teeth 13b and 14b are formed in a tapered shape in which the circumferential width gradually becomes narrower inward in the radial direction, and the cross section of the slot 16 is rectangular. The core block 12 in a state where the circumferential side surfaces of the large iron core back yoke portion 13a and the small iron core back yoke portion 14a are in contact with each other has a shape obtained by dividing the annular stator iron core 11 into 12 equal parts in the circumferential direction. .

  As shown in FIGS. 6 and 7, the winding body 22 is formed in two rows separated by a 6-slot angular interval θ, and the first and second straight portions 22 a arranged in contact with each other in four rows. , 22b, and first and second coil ends 22c, 22d that alternately connect one end and the other end in the length direction between the first and second linear portions 22a, 22b, First and second nose parts formed at the center in the length direction of the second coil ends 22c and 22d and for displacing the positions of the first and second linear parts 22a and 22b connected in the arrangement direction by a predetermined amount in the arrangement direction. 22e, 22f.

  Here, the first and second nose portions 22e and 22f are radially inward of the slots 16 on one side of the six teeth 13b and 14b in which the rows of the four first straight portions 22a arranged in one row are continuous. The four second linear portions 22b arranged in one row are connected so that the rows of the six consecutive teeth 13b, 14b are inserted radially outward of the slots 16 on the other side. The first and second straight portions 22a and 22b are displaced in the arrangement direction. The six-slot angular interval θ is an interval between the slot centers of the slots 16 on both sides of the six consecutive teeth 13b and 14b, and corresponds to one magnetic pole pitch.

  In order to fabricate the winding body 22, for example, a conductor wire 23 having a rectangular cross section made of a continuous copper wire or an aluminum wire, which is insulation-coated with enamel resin and has no connection portion, is connected to the first straight portion 22a and the first linear portion 22a. A coil body is produced by winding the ends of the two straight portions 22b four times in a track shape in which the first and second coil ends 22c and 22d having arc shapes are connected. Next, each row of the first and second linear portions 22a, 22b is chucked, and further, the center portion in the length direction of each row of the first and second coil ends 22c, 22d (first and second nose portions 22e, 22f). ), The coil body is deformed into a shape in which each row of the first and second linear portions 22a and 22b can be inserted into the pair of slots 16 separated by one magnetic pole pitch, and the winding body 22 is manufactured.

  As shown in FIG. 5, the winding assembly 21 is configured by arranging 48 winding bodies 22 in the circumferential direction at a pitch of 1 slot. In the winding assembly 21 configured in this way, 48 rows of eight first and second linear portions 22a and 22b arranged in a row in the radial direction are arranged in the circumferential direction at a slot pitch. Yes. A slot cell 25 formed by bending the insulating sheet into a U-shape is attached to the row of the first and second straight portions 22a and 22b from the outer diameter side, and the first and second straight portions are formed by an adhesive or the like. It is fixed to 22a and 22b. As a result, 48 winding bodies 22 constituting the winding assembly 21 are connected and integrated. Although not shown, the 48 winding bodies 22 may be fixed in the form of the winding assembly 21 by using a jig for fixing the winding bodies 22.

  Next, a method for assembling the stator 10 will be described with reference to FIGS. 8 to 11 are views for explaining a method for assembling the stator in the rotary electric machine according to Embodiment 1 of the present invention. FIG. 8 shows a state before the core block is mounted on the winding assembly. 9 and 10 each show a state in the middle of mounting the iron core block on the winding assembly, and FIG. 11 shows a state where the iron core block is mounted on the winding assembly. 8 to 11, for convenience, the winding assembly 21 is represented by only the first and second straight portions 22a and 22b.

  First, as shown in FIG. 8, two one-tooth cores 14 are opened with respect to the two-tooth core 13 around the thin portion 15, and the teeth 13 b of the two-tooth core 13 are first and second straight portions 22 a and 22 b. The core block 12 is disposed on the outer peripheral side of the winding assembly 21 so as to be located radially outward between the rows of the winding assemblies 21. As a result, the slot 16 of the two-tooth iron core 13 is located radially outward of the row of the first and second straight portions 22a and 22b. Further, although not shown, a pair of guide members 24 are set on the outer peripheral side of the winding assembly 21 and on both sides in the circumferential direction of the iron core block 12. The inner peripheral wall surfaces facing the circumferential direction of the pair of guide members 24 are formed in a planar shape that passes through the slot centers of the slots 16 on both sides of the six consecutive teeth 13b, 14b in the stator core 11.

  Next, the iron core block 12 is moved inward in the radial direction so that the row of the first and second straight portions 22a and 22b is inserted into the slot 16 of the two-tooth iron core 13. At this time, since the one teeth iron cores 14 on both sides are open with respect to the two teeth iron core 13 around the thin portion 15, the teeth 14 b do not hit the first and second straight portions 22 a and 22 b, so The row of straight portions 22 a and 22 b is inserted into the slot 16 of the two teeth core 13.

  Then, as the iron core block 12 moves radially inward, the two one-tooth iron cores 14 are guided by the opposing inner peripheral wall surfaces of the pair of guide members 24, as shown in FIGS. The two teeth iron core 13 is closed around the thin portion 15 so that the distal end side of the teeth 14b faces the teeth 13b. Accordingly, the teeth 14b avoid interference with the four second straight portions 22b on the outer diameter side while changing the angle in the length direction, and then interfere with the four first straight portions 22a on the inner diameter side. Is inserted between the rows of the first and second straight portions 22a and 22b.

  When the side surfaces on the outer circumferential side of the two one-tooth cores 14 are in surface contact with the opposing inner circumferential wall surfaces of the pair of guide members 24, the side surfaces on the inner circumferential direction of the two one-tooth cores 14 are the two-tooth cores 13. The core block 12 is prevented from moving further inward in the radial direction. As a result, as shown in FIG. 11, the teeth 13 b and 14 b are completely inserted between the rows of the first and second linear portions 22 a and 22 b, respectively, and one core block 12 is attached to the winding assembly 21. . This operation is repeated, and the 12 core blocks 12 for one turn of the stator core 11 are sequentially mounted on the winding assembly 21 to assemble the stator 10.

  Next, the stator 10 is fixed to the cylindrical portion of the frame 2 by press fitting or shrink fitting, and the twelve core blocks 12 arranged in the circumferential direction are integrated to form a cylindrical stator core 11. In the winding assembly 21, the first and second straight portions 22 a and 22 b are accommodated in the slots 16 so as to be aligned in a row in the radial direction and mounted on the stator core 11.

  In the stator 10 assembled in this way, the first and second linear portions 22a and 22b of the winding body 22 are accommodated in the slots 16 on both sides of the six consecutive teeth 13b and 14b in the stator core 11. Therefore, the winding assembly 21 is a distributed winding. Further, the eight first and second straight portions 22a and 22b are accommodated in the slots 16 in a row in the radial direction so as to be in contact with each other with the long sides of the rectangular cross section facing in the circumferential direction. As a result, the space factor is increased. Four first straight portions 22 a are housed on the inner diameter side in the slot 16, and four second straight portions 22 b are housed on the outer diameter side in the slot 16. A slot cell 25 is mounted in the slot 16 and isolates the first and second straight portions 22a and 22b arranged in a row from the inner peripheral surface of the slot 16, and the stator core 11 and the winding assembly 21 are separated from each other. Electrical insulation is ensured.

  According to the first embodiment, two one-tooth cores 14 are connected to both sides of one two-tooth core 13 so as to be openable and closable around a thin portion 15, so that the core block 12 is configured in advance. The stator core 10 with the winding assembly 21 mounted on the annular stator core 11 can be assembled by mounting the core block 12 on the manufactured winding assembly 21 from the outer peripheral side. Therefore, even if the cross-sectional area of the conductor wire 23 is increased, the annular stator core 11 can be easily manufactured, the occurrence of the collapse of the shape of the winding assembly 21 is suppressed, and the performance deterioration can be suppressed. It can cope with high output of rotating electrical machines. In Patent Document 2, 48 core blocks are required, but in Embodiment 1, the number of core blocks 12 is 12, which reduces the number of parts and facilitates transportation and handling during manufacturing. Thus, the manufacturing cost can be reduced.

  Further, since the center of the iron core block 12 is the two-tooth iron core 13, when the iron core block 12 is inserted into the winding assembly 21, the first and second straight portions 22 a and 22 b of the winding body 22 are arranged in the two-tooth iron core 13. The core block 12 can be inserted while stabilizing the inclination and position when the core block 12 is inserted. Therefore, it becomes easy to insert the iron core block 12 into the winding assembly 21, the assembling property of the stator 10 is improved, and the occurrence of damage to the insulating coating coated on the conductor wire of the winding assembly 21 is suppressed. .

  In the first embodiment, the stator 10 assembled by sequentially mounting the twelve iron core blocks 12 to the winding assembly 21 from the outer peripheral side is fixed to the cylindrical portion of the frame 2 by press fitting or shrink fitting. The 12 core blocks 12 arranged in the circumferential direction are integrated to produce the annular stator core 11. After the 12 core blocks 12 are sequentially attached to the winding assembly 21 from the outer peripheral side. The annular core iron core 11 may be manufactured by joining and integrating adjacent iron core blocks 12 by welding or the like.

Embodiment 2. FIG.
FIG. 12 is a plan view showing an iron core block constituting a stator core applied to a rotary electric machine according to Embodiment 2 of the present invention, and FIGS. 13 to 15 are diagrams of the rotary electric machine according to Embodiment 2 of the present invention. It is a figure explaining the assembly method of a stator. In FIGS. 13 to 15, for convenience, the winding assembly 21 is represented by only the first and second straight portions 22a and 22b, and the slot cells are omitted.

  12 to 15, the winding assembly 21 </ b> A is configured by arranging winding bodies produced by winding a conductor wire twice in the circumferential direction at a 1-slot pitch. Then, 48 rows of four first and second straight portions 22a and 22b arranged in one row in the radial direction are arranged in the circumferential direction at a one-slot pitch.

  The iron core block 12A is composed of one two-tooth iron core 13A and four one-tooth iron cores 14A arranged two on each circumferential side of the two-tooth iron core 13A. Then, one 2-tooth iron core 13A and four 1-tooth iron cores 14A are connected to the outer peripheral portion of the large iron core back yoke portion 13a and the outer peripheral portion of the small iron core back yoke portion 14a by the thin portion 15, respectively. The outer peripheral parts of the back yoke part 14a are connected by the thin part 15, and are connected to each other so as to be openable and closable around the thin part 15. The lengths of the teeth 13b and 14b in the iron core block 12A are shorter than the iron core block 12 in accordance with the arrangement length of the first and second linear portions 22a and 22b.

  The second embodiment is configured in the same manner as in the first embodiment except that the core block 12A and the winding assembly 21A are used instead of the core block 12 and the winding assembly 21.

  Here, a method for assembling the stator according to the second embodiment will be described with reference to FIGS.

  First, as shown in FIG. 13, the two inner teeth cores 14A on the inner side are opened around the thin portion 15 with respect to the two teeth core 13A, and the outer two teeth teeth 14A are further opened on the inner teeth 1 core 14A. The core block 12A is disposed on the outer peripheral side of the winding assembly 21A so that the thin portion 15 is opened at the center and the teeth 13b are located radially outward between the rows of the first and second linear portions 22a, 22b. To do. At this time, the slot 16 of the two-tooth iron core 13A is located radially outward of the row of the first and second straight portions 22a and 22b. Further, although not shown, a pair of guide members are set on the outer peripheral side of the winding assembly 21A and on both sides in the circumferential direction of the iron core block 12A.

  Next, the iron core block 12A is moved inward in the radial direction so that the rows of the first and second straight portions 22a and 22b are inserted into the slots 16 of the two-tooth iron core 13A. At this time, since the four one-tooth cores 14A are opened around the thin portion 15, the teeth 14b of the four one-tooth cores 14A do not hit the first and second straight portions 22a, 22b, and the first and second The row of straight portions 22a and 22b is inserted into the slot 16 of the 2-tooth core 13A.

  Then, as the iron core block 12A moves inward in the radial direction, the outer two one-tooth iron cores 14A are guided by the opposing inner peripheral wall surfaces of the pair of guide members so that the tip side of the teeth 14b faces the teeth 13b. Further, the thin portion 15 is closed with respect to the inner one tooth iron core 14A. Further, according to the movement of the two outer one-tooth cores 14A, the inner two one-tooth iron cores 14A are closed with respect to the two-tooth iron core 13A around the thin portion 15. Thereby, as shown in FIG. 14, the teeth 14b avoid interference with the two second straight portions 22b on the outer diameter side while changing the angle in the length direction, and then the teeth 2b on the inner diameter side. It is inserted between the first and second linear portions 22a, 22b while avoiding interference with the first linear portion 22a.

  Then, when the outer side surfaces of the two outer teeth cores 14A are in surface contact with the opposing inner peripheral wall surfaces of the pair of guide members, the adjacent one teeth iron cores 14A are opposed to each other in the circumferential direction. The two inner surfaces of the one teeth core 14A on the inner side are brought into contact with both side surfaces in the circumferential direction of the two teeth core 13A, and further movement of the core block 12A inward in the radial direction is prevented. Thereby, as shown in FIG. 15, the teeth 13b and 14b are completely inserted between the rows of the first and second linear portions 22a and 22b, respectively, and the iron core block 12A is attached to the winding assembly 21A. By repeating this operation, eight core blocks 12A for one turn of the stator core are sequentially mounted on the winding assembly 21A, and the stator is assembled.

Therefore, also in the second embodiment, even if the cross-sectional area of the conductor wire 23 is increased, an annular stator core can be easily manufactured, and the occurrence of the collapse of the shape of the winding assembly 21A is suppressed. The decrease can be suppressed, and it is possible to cope with higher output of the rotating electrical machine.
In the second embodiment, the number of iron core blocks 12A is eight, the number of parts is reduced, transportation and handling at the time of manufacture becomes easier, and the manufacturing cost can be further reduced.

Embodiment 3 FIG.
FIG. 16 is a plan view showing a state before constituting a two-core iron core of an iron core block constituting a stator iron core applied to a rotary electric machine according to Embodiment 3 of the present invention, and FIG. 17 is an embodiment of the present invention. FIG. 18 is a plan view showing an iron core block constituting a stator iron core applied to a rotating electric machine according to FIG. 3, and FIG. 18 is a diagram of manufacturing an iron core block constituting a stator iron core applied to a rotating electric machine according to Embodiment 3 of the present invention. It is a top view explaining a method.

  In FIG. 16, the iron core block 12B includes one first and second one-tooth iron cores 30A and 30B arranged side by side in the circumferential direction, and one on both sides in the circumferential direction of the first and second one-tooth iron cores 30A and 30B. It consists of two 1-tooth cores 14 arranged one by one. The first one-tooth iron core 30A is formed so as to extend radially inward from the first small iron core back yoke portion 30a having a circular arc cross section and the inner peripheral wall surface of the first small iron core back yoke portion 30a. One tooth 13b and a fitting portion 31a formed on one side surface in the circumferential direction of the first small iron core back yoke portion 30a are provided. The second one-tooth iron core 30B is formed so as to extend radially inward from the inner wall surface of the second small iron core back yoke portion 30b and the second small iron core back yoke portion 30b having an arc cross section. One tooth 13b and a fitting portion 31b formed on the other side surface of the second small iron core back yoke portion 30b in the circumferential direction are provided.

  The first and second one-core iron cores 30A, 30B and the two one-tooth cores 14 are formed by the thin-walled portion 15 between the outer periphery of the first small iron core back yoke portion 30a and the outer periphery of the small iron core back yoke portion 14a. The outer peripheral portions of the first and second small iron core back yoke portions 30a and 30b are connected to each other by the thin portion 15, and the outer peripheral portion of the second small iron core back yoke portion 30b and the outer periphery of the small iron core back yoke portion 14a are connected. The thin portions 15 are connected to each other so that they can be opened and closed with the thin portion 15 as the center.

Then, the first and second one-core iron cores 30A and 30B are closed with the thin-walled portion 15 at the center, and the side surface on one side in the circumferential direction of the first small iron core back yoke portion 30a and the second small iron core back yoke portion 30b. The other side surfaces in the circumferential direction are brought into contact with each other, and the fitting portions 31a and 31b of the first and second small iron core back yoke portions 30a and 30b are fitted to each other. Thereby, the 1st and 2nd 1 teeth iron core 30A, 30B is integrated, and a 2 teeth iron core is comprised. Therefore, the iron core block 12B has substantially the same configuration as the iron core block 12 in the first embodiment, as shown in FIG.
Therefore, also in Embodiment 3, the same effect as in Embodiment 1 can be obtained.

  The iron core block 12B configured as described above is manufactured by laminating a predetermined number of electromagnetic steel sheet pieces 35 punched from the electromagnetic steel sheet 40 by a press machine and integrating them by caulking or the like. The electromagnetic steel sheet piece 35 is composed of four core pieces 36, 37, 38 composed of iron core back yoke portions 36a, 37a, 38a and teeth portions 36b, 37b, 38b, and the outer peripheral ends of the iron core back yoke portions 38a, 36a are thin. The outer peripheral ends of the iron core back yoke portions 36a and 37a are connected by the thin-walled piece 39, and the outer peripheral ends of the iron core back yoke portions 37a and 38a are connected by the thin-walled piece 39 to be connected in a row. It is arranged side by side. At this time, since the four core pieces 36, 37, 38 are connected by the thin piece 39 so as to be opened and closed, the length directions of the teeth portions 36b, 37b, 38b of the four core pieces 36, 37, 38 are parallel to each other. It can be expanded to become. Therefore, as shown in FIG. 18, the electrical steel sheets so that the length directions of the teeth portions 36 b, 37 b, 38 b coincide with the length direction of the electrical steel sheet 40 and the teeth portions 36 b, 37 b, 38 b are engaged with each other. Since the piece 35 can be punched out, the yield can be increased.

  Here, a predetermined number of core pieces 36 are laminated and integrated to form a first one-tooth core 30A. And the laminated part of the iron core back yoke part 36a comprises the 1st small iron core back yoke part 30a, and the laminated part of the teeth part 36b comprises the teeth 13b. The laminated portion of the fitting portion 36c formed on the side surface on one side in the circumferential direction of the iron core back yoke portion 36a constitutes the fitting portion 31a.

  A predetermined number of core pieces 37 are stacked and integrated to form a second 1-tooth core 30B. And the lamination | stacking part of the iron core back yoke part 37a comprises the 2nd small iron core back yoke part 30b, and the lamination | stacking part of the teeth part 37b comprises the teeth 13b. The laminated portion of the fitting portion 37c formed on the other side surface in the circumferential direction of the iron core back yoke portion 37a constitutes the fitting portion 31b.

  A predetermined number of iron core pieces 38 are laminated and integrated to form a one-tooth iron core 14. And the lamination | stacking part of the iron core back yoke part 38a comprises the small iron core back yoke part 14a, and the lamination | stacking part of the teeth part 38b comprises the teeth 14b. Further, the laminated portions of the thin pieces 39 constitute the thin portions 15 respectively.

Embodiment 4 FIG.
19 is a plan view showing an iron core block constituting a stator core applied to a rotary electric machine according to Embodiment 4 of the present invention, and FIG. 20 is an assembly of the stator in the rotary electric machine according to Embodiment 4 of the present invention. FIG. 21 is a diagram for explaining a method, and FIG. 21 is a diagram for explaining a method for assembling a stator in a rotary electric machine according to Embodiment 4 of the present invention. In FIG. 20 and FIG. 21, slot cells are omitted for convenience.

  In FIG. 19, an iron core block 12C includes a large iron core back yoke portion 13a having an arc cross section, two teeth 13b formed to extend radially inward from the inner peripheral wall surface of the large iron core back yoke portion 13a, and Two teeth iron core 13C provided with projections 13c projecting radially inward from both circumferential sides of the tip surface of teeth 13b, small iron core back yoke 14a, and small iron core back yoke 14a having a circular arc cross section. A tooth 14b formed so as to extend radially inward from the inner peripheral wall surface thereof, and a protrusion 14c protruding radially inward from both circumferential sides of the tip surface of the tooth 14b. It has two 1 teeth iron cores 14C arrange | positioned at the circumferential direction both sides of the teeth iron core 13C. The two one-tooth cores 14C are connected to the outer peripheral portion of the small iron core back yoke portion 14a via the thin-walled portion 15 that can be bent to the outer peripheral portion of the large iron core back yoke portion 13a, respectively. It is connected to the both sides in the direction so as to be openable and closable around the thin portion 15.

  The iron core block 12C is the same as the iron core block 12 in the first embodiment except that the protruding portions 13c and 14c protrude radially inward from both circumferential sides of the tip surfaces of the teeth 13b and 14b. It is configured. Therefore, the iron core block 12C is attached to the winding assembly 21 in the same manner as in the first embodiment. At this time, since the protrusions 13c and 14c extend radially inward from the tip surfaces of the teeth 13b and 14b and do not extend outward in the circumferential direction from the teeth 13b and 14b, the core block 12C is wound around the winding assembly 21. When attaching to the winding assembly 21, the protrusions 13c, 14c do not interfere with the rows of the first and second linear portions 22a, 22b, and the core block 12C can be smoothly attached to the winding assembly 21.

  In the iron core block 12C attached to the winding assembly 21, as shown in FIG. 20, the teeth 13b and 14b are inserted between the rows of the first and second linear portions 22a and 22b, respectively, and the front end surfaces thereof are It extends radially inward. Then, the protrusions 13c and 14c extending radially inward from the tip surfaces of the teeth 13b and 14b are bent outward in the circumferential direction, as shown in FIG. 21, to narrow the opening width of the slot 16. Yes.

  According to the fourth embodiment, since the opening width of the slot 16 is narrowed by the protrusions 13c and 14c formed on the tip surfaces of the teeth 13b and 14b, the first straight portion 22a of the winding assembly 21 protrudes. Can be prevented. Furthermore, since the magnetic flux from the stator is efficiently transmitted to the rotor 5 via the projections 13c and 14c extending to the opening side of the slot 16, the output of the rotating electrical machine can be increased.

In each of the above embodiments, one or two 1-tooth cores are continuously connected to both sides of the 2-tooth core, but the number of 1-tooth cores connected to both sides of the 2-tooth core 13 is as follows. It is not limited to one or two. In other words, the number of 1-tooth cores connected to both sides of the 2-tooth core avoids interference between the teeth of the 1-core core and the rows of the first and second linear portions when the core block is mounted on the winding assembly. In order to be able to do so, it is appropriately set according to the diameter of the stator core and the tooth length.
In the above-described embodiments, the same number of one-core iron cores are connected to both sides of the two-tooth iron core, but the number of one-tooth cores connected to both sides of the two-tooth iron core may be different.

In each of the above embodiments, the winding body is manufactured using a conductor wire having a rectangular cross section, but the winding body may be manufactured using a conductor wire having a circular cross section. In this case, bending of the conductor wire is facilitated.
Further, in each of the above embodiments, the winding assembly is configured by arranging a winding body formed by winding a conductor wire in a track shape a plurality of times in a circumferential direction at a one-slot pitch. The configuration is not limited to this, and it may be configured in a ring shape. For example, a wave winding formed by winding a conductor wire in a wave winding may be used.

In each of the above embodiments, an 8-pole 48-slot rotary electric machine has been described. However, the number of poles and the number of slots are not limited to 8 poles and 48 slots.
In each of the above embodiments, the stator is described as the armature. However, the same effect can be obtained even when applied to an outer rotor type winding rotor.

  10 Stator (armature), 11 Stator core (armature core), 12, 12A, 12B, 12C Iron core block, 13, 13A, 13C 2 teeth iron core, 13a Large iron core back yoke, 13b Teeth, 13c Projection , 14, 14A, 14C 1 teeth iron core, 14a large iron core back yoke part, 14b teeth, 14c protrusion, 15 thin wall part, 16 slots, 21, 21A winding assembly, 30A first 1 teeth iron core, 30a first small Iron core back yoke part, 30B 2nd 1 teeth iron core, 30b 2nd small iron core back yoke part, 31a, 31b Fitting part.

Claims (5)

An armature core in which teeth extend radially inward from the inner circumferential wall surface of the annular core back yoke and are arranged at a predetermined pitch in the circumferential direction, and slots are formed between adjacent teeth;
A winding assembly that is inserted into a slot of the armature core and attached to the armature core;
The armature core is configured by arranging a plurality of core blocks in the circumferential direction,
The iron core block includes a large iron core back yoke portion having an arc-shaped cross section, and one two teeth iron core having two teeth extending radially inward from an inner peripheral wall surface of the large iron core back yoke portion; One of the two teeth cores is disposed on both sides in the circumferential direction, and extends inward in the radial direction from a small iron core back yoke portion having an arc cross section and an inner peripheral wall surface of the small iron core back yoke portion. 1 tooth iron core having only one of the above teeth,
The two teeth iron core and the two one teeth iron cores are connected to each other by connecting the outer peripheral portions of the large iron core back yoke portion and the small iron core back yoke portion with a thin-walled portion that can be bent. Characteristic armature.   The iron core block is connected to the one teeth iron core connected to at least one side in the circumferential direction of the two teeth iron core by connecting the outer peripheral portions of the small iron core back yoke portions with the thin portion. The armature according to claim 1, further comprising at least one one-tooth iron core. The two teeth iron core includes a first small iron core having a first small iron core back yoke portion and one of the teeth extending radially inward from an inner peripheral wall surface of the first small iron core back yoke portion; A second small iron core back yoke portion, and a second one teeth iron core having one of the above teeth extending radially inward from the inner peripheral wall surface of the second small iron core back yoke portion,
The first one-tooth iron core has a fitting portion on a side surface of the first small iron core back yoke portion ,
The second one tooth iron core, opposite a fitted in the fitting portion on the side surface opposing the second small core back yoke portion to the side surface of the first small core back yoke portion having the fitting portion Part
And the first first teeth core and the second one tooth iron core, the first small core back yoke part and the outer peripheral portions of the second small core back yoke portion bout are connected by a thin-walled portion Connected,
Wherein the opposed side surfaces of the first small core back yoke portion above SL and the second small core back yoke portion is on SL fitting portion is match-by fitting to the fitted portion The armature according to claim 1 or claim 2.   The protrusion part formed in the circumferential direction both sides of the front end surface of the said tooth | gear, The said protrusion part is bent to the said slot side in the circumferential direction, The opening width of the said slot is narrowed, It is characterized by the above-mentioned. The armature according to claim 3.   The rotary electric machine provided with the armature of any one of Claims 1-4.

Images