JP5901503B2 - Rotating electric machine - Google Patents

Description

  The present invention relates to a rotating electric machine such as an electric motor or a generator, and more particularly to a cooling structure for an armature winding.

  2. Description of the Related Art In recent years, small and high output has been demanded in rotating electrical machines such as electric motors and generators. In this type of rotating electrical machine, the heat generated during operation increases as the output increases, so the maximum output depends on the heat resistance temperature of the insulating material of the stator and the heat resistance temperature of the magnet installed in the rotor. Limited. Therefore, in order to achieve high output of the rotating electric machine, it is important to improve the heat dissipation of the armature winding that becomes a heat source during operation.

  In view of such a situation, a slot cell interposed between the armature winding and the inner peripheral surface of the slot of the iron core is made of a good heat transfer material, and heat generated in the armature winding is efficiently made into the iron core. A conventional rotating electric machine that improves the heat dissipation of the armature winding by transmitting is proposed (see, for example, Patent Document 1).

JP 2012-044831 A

  However, the conventional rotating electric machine has a problem that the manufacturing cost of the rotating electric machine increases because the material of the slot cell is a special material and is expensive.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a high-output rotating electrical machine that can increase the heat dissipation of the armature winding by the structure of the slot cell and can reduce the manufacturing cost.

A rotating electrical machine according to the present invention includes an armature core, an armature winding that is inserted into a slot of the armature core and is attached to the armature core, and is inserted into the slot and is inserted into the slot. And an armature having a slot cell for isolating the conductor wire of the armature winding from the inner peripheral surface of the slot. The slot cell is formed in a U shape including a pair of side surface portions and a bottom surface portion along the inner peripheral surface of the slot, and has a concavo-convex shape on a surface of the side surface portion opposite to the inner peripheral surface of the slot .

  According to the present invention, the slot cell has an uneven shape on the surface of the side surface portion along the inner peripheral surface of the slot. Due to the concavo-convex shape of the side surface portion, a refrigerant passage is formed between the conductor wire of the armature winding inserted into the slot or between the inner peripheral surface of the slot. Thereby, since the heat generated in the armature winding is radiated to the refrigerant flowing through the refrigerant passage, the heat dissipation of the armature winding can be improved without using a special material for the material of the slot cell, A low-cost and high-output rotating electrical machine can be realized.

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 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 coil | winding assembly which comprises the stator coil | winding 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 a front view which shows the winding body which comprises the coil | winding assembly in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a side 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 a top view which shows typically 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 a partially broken perspective view which shows the slot cell in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a perspective view explaining the assembly method of the coil | winding assembly in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a perspective view explaining the assembly method of the coil | winding assembly in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a perspective view explaining the assembly method of the coil | winding assembly in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a schematic diagram explaining the procedure of incorporating the 48th winding body in the assembly method of the winding assembly in the rotary electric machine according to Embodiment 1 of the present invention. It is a schematic diagram explaining the procedure of incorporating the 48th winding body in the assembly method of the winding assembly in the rotary electric machine according to Embodiment 1 of the present invention. It is a schematic diagram explaining the procedure of incorporating the 48th winding body in the assembly method of the winding assembly in the rotary electric machine according to Embodiment 1 of the present invention. It is a figure explaining the method of mounting | wearing the stator core with the coil | winding assembly in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a figure explaining the method of mounting | wearing the stator core with the coil | winding assembly in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a figure explaining the method of mounting | wearing the stator core with the coil | winding assembly in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a principal part perspective view explaining the slot cell mounting state of the stator in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a disassembled perspective view explaining the mounting state of the slot cell in the rotary electric machine according to Embodiment 2 of the present invention. It is principal part sectional drawing explaining the mounting state of the slot cell in the rotary electric machine which concerns on Embodiment 3 of this invention. It is principal part sectional drawing explaining the mounting state of the slot cell in the rotary electric machine which concerns on Embodiment 4 of this invention. It is principal part sectional drawing explaining the mounting state of the slot cell in the rotary electric machine which concerns on Embodiment 5 of this invention. It is principal part sectional drawing which shows the slot periphery of the rotary electric machine which concerns on Embodiment 6 of this invention.

  Hereinafter, preferred embodiments of a rotating electrical 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 showing a stator applied to the rotating electrical machine according to Embodiment 1 of the present invention, and FIG. FIG. 4 is a perspective view showing an iron core block constituting a stator core applied to the rotary electric machine according to the first embodiment of the present invention, and FIG. 4 is a stator winding of the stator applied to the rotary electric machine according to the first embodiment of the present invention. 5 is a perspective view showing a winding assembly constituting the wire, FIG. 5 is a perspective view showing a winding body constituting the winding assembly in the rotary electric machine according to Embodiment 1 of the invention, and FIG. 6 is an embodiment of the invention. FIG. 7 is a front view showing a winding body constituting the winding assembly in the rotating electrical machine according to Embodiment 1 of the present invention, and FIG. 8 relates to the first embodiment of the present invention. Top view schematically illustrating a winding body that constitutes the winding assembly in the rotary electric machine, FIG. 9 is a partially broken perspective view showing the slot cell in a rotating electric machine according to Embodiment 1 of the present invention.

  In FIG. 1, a 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 an armature housed in the frame 2 and fixed to a cylindrical portion of the frame 2. And fixed to a rotating shaft 6 rotatably supported on the bottom and end plate 3 of the frame 2 via a bearing 4 and rotatably disposed on the inner peripheral side of the stator 10. And a rotor 5.

  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.

  As shown in FIG. 2, the stator 10 is mounted in a slot 13, a stator core 11 as an armature core, a stator winding 20 as an armature winding mounted on the stator core 11, and a slot 13. And a slot cell 30 that insulates the stator core 11 and the stator winding 20 from each other.

As shown in FIG. 3, the iron core block 12 is manufactured by laminating and integrating a predetermined number of electromagnetic steel plates, and is radially inward from the core back portion 12a having a circular arc cross section and the inner peripheral wall surface of the core back portion 12a. And a tooth 12b formed so as to extend. That is, the core block 12 is an iron core block obtained by dividing the annular stator core 11 into 48 equal parts in the circumferential direction.
The stator core 11 is formed by aligning and integrating the 48 core blocks 12 in the circumferential direction, with the teeth 12b facing inward in the radial direction, but with the side surfaces in the circumferential direction of the core back portion 12a facing each other. It is configured in an annular shape. The slots 13 constituted by the iron core blocks 12 adjacent in the circumferential direction are arranged at an equiangular pitch in the circumferential direction so as to open to the inner circumferential side. The teeth 12b are formed in a tapered shape in which the circumferential width gradually decreases inward in the radial direction, and the cross section of the slot 13 is rectangular.

  As shown in FIG. 4, the stator winding 20 is configured by connecting a winding assembly 21 mounted on the stator core 11. The winding assembly 21 is configured by arranging 48 winding bodies 22 to be described later in the circumferential direction at one slot pitch.

  As shown in FIGS. 5 to 7, the winding body 22 is formed of, for example, a conductor wire 25 having a rectangular cross section made of a continuous copper wire, an aluminum wire, or the like that is insulation-coated with enamel resin and has no connection portion. It is a tortoiseshell-shaped coil that is configured to be spirally wound four times in a substantially hexagonal shape with a constant gap d for each turn. The winding body 22 is produced, for example, by winding a conductor wire four times in a spiral shape to produce a cylindrical coil body, and then forming the coil body into a substantially hexagonal shape by a coil molding machine. Further, the winding body 22 may be manufactured by bending a conductor wire into a substantially hexagonal shape by bending, and winding it in a spiral shape.

  The winding body 22 is divided into two rows at an interval of 6 slots, and the first and second straight portions 22a and 22b are arranged in four rows with a gap d in each row, and the first and second straight portions 22a and 22b. First and second coil ends 22c and 22d for alternately connecting one end and the other end in the length direction between the two linear portions 22a and 22b are provided. Further, the winding body 22 has a winding end 22g extending in the length direction from the other end of the first linear portion 22a located at one end in the arrangement direction of one row, and the other end in the arrangement direction of the other row. A winding end 22h extending in the length direction from the other end of the second linear portion 22b. The 6-slot angular interval is an interval between the slot centers of the slots 13 on both sides of the six consecutive teeth 12b.

  In the winding body 22 configured as described above, as shown in FIG. 8, the first and second straight portions 22 a and 22 b each have a plane constituted by the long sides of the rectangular cross section of the conductor wire 25. Oppositely, the conductor lines 25 are arranged at a pitch of about twice the short side length (d) in the short side length direction of the rectangular cross section. Further, the first top portion 22e and the second top portion 22f are formed at the center in the length direction of the first and second coil ends 22c, 22d. The first straight portion 22a and the second straight portion 22b connected via the first and second coil ends 22c and 22d are shifted by a gap d in the arrangement direction by the first top portion 22e and the second top portion 22f. .

  As shown in FIG. 9, the slot cell 30 is produced by bending an insulating sheet made of, for example, polyphenylene sulfide (PPS) resin or aramid resin, and has a width slightly longer than the axial length of the slot 13. The slot 13 is formed in a U-shape consisting of a pair of side surface portions 31b and a bottom surface portion 31a along the opposite side surface and bottom surface, that is, the inner peripheral surface of the slot 13. And the convex part 32 and the recessed part 33 are alternately formed in the width direction (equivalent to the axial direction of the slot 13) of the side part 31b in the internal peripheral surface of the side part 31b, and the surface of the side part 31b is formed in uneven | corrugated shape. Has been. The convex portions 32 and the concave portions 33 are formed simultaneously with the formation of the insulating sheet. The slot cell 30 is formed in a U-shape including a pair of side surface portions 31b and a bottom surface portion 31a. However, the slot cell 30 may include a collar portion formed by folding both end portions in the width direction. Good.

  Next, a method for assembling the winding assembly 21 will be described with reference to FIGS. FIGS. 10 to 12 are perspective views for explaining a method of assembling the winding assembly in the rotary electric machine according to the first embodiment of the present invention, and FIGS. 13 to 15 are diagrams for the rotary electric machine according to the first embodiment of the present invention. It is a schematic diagram explaining the procedure of incorporating the 48th winding body in the assembly method of a winding assembly.

Here, for convenience of explanation, the winding bodies 22 are referred to as winding bodies 22 ₁ , winding bodies 22 ₂ ... Winding bodies 22 ₄₇ and winding bodies 22 _{48 in the} order of assembly.

First, as shown in FIG. 10, the first and second winding bodies 22 ₁ , 22 ₂ are arranged so as to be adjacent to each other in the circumferential direction with their axial height positions aligned. Then, as shown in Figure 11, the second first straight portion 22a of the winding 22 _2, inserted between the second linear portion 22b having a first winding 22 ₁ of the gap d. Then, until the first linear portion 22a of the second winding 22 ₂ becomes the first (angle between 1 slot) from the first linear portion 22a of the winding 22 ₁ 1 slot pitch spaced locations, moving the second winding 22 ₂ in the circumferential direction. Thereby, the two winding bodies 22 ₁ and 22 ₂ are assembled as shown in FIG.

Then, although not shown, the third winding body 22 ₃ windings ₂₂ 1, 22 ₂ of the assembly, assembled in the same manner. In this way, the fourth, assembled to the fifth ... 47 th winding body _{22 47.} The assembly 23 in which the ₄₇ winding bodies 22 _{1 to} 22 ₄₇ are assembled is expanded in the radial direction, and as shown in FIG. 13, the first winding body 22 ₁ and the 47th winding are formed. The gap between the body ₂₂₄₇ and the body 2247 is formed in a C-shape that is wider than the circumferential width of the _48th winding body 2248.

Then, as shown in FIG. 14, assembled to 48th winding body _{22 48} 47 th winding body _{22 47} side. Furthermore, as shown in FIG. 15, it closes the opening of the C-shaped assembly 23, assembled first winding 22 ₁ and the 48-th winding body 22 _48, annular shown in FIG. 4 The winding assembly 21 is assembled.

  In the winding assembly 21 assembled in this way, eight first and second linear portions 22a and 22b arranged in a row in the radial direction are arranged in 48 rows in the circumferential direction at a one-slot pitch. The winding ends 22g extend in the axial direction, and are arranged in the circumferential direction at a one-slot pitch on the inner diameter side of the winding assembly 21. The winding ends 22h extend in the axial direction in the same direction as the winding end 22g, and are arranged in the circumferential direction at a one-slot pitch on the outer diameter side of the winding assembly 21.

  Next, a method for mounting the winding assembly 21 to the stator core 11 will be described with reference to FIGS. 16 to 19. FIGS. 16 to 18 are views for explaining a method of mounting the winding assembly on the stator core in the rotary electric machine according to Embodiment 1 of the present invention, and FIG. 16 shows a state before the winding assembly is mounted. FIG. 17 shows a state after the winding assembly is mounted, and FIG. 18 shows an enlarged state after the winding assembly is mounted. FIG. 19 is a perspective view of relevant parts for explaining the slot cell mounting state of the stator in the rotary electric machine according to Embodiment 1 of the present invention. 16 to 18, for convenience, the winding assembly 21 is represented by only the first and second linear portions 22a and 22b.

  First, as shown in FIG. 16, the 48 iron core blocks 12 are arranged so that each of the teeth 12b is radially outward between adjacent rows of the first and second linear portions 22a and 22b of the winding assembly 21. They are arranged at a substantially equiangular pitch in the circumferential direction so as to be positioned. Next, the slot cells 30 are disposed between the teeth 12b of the adjacent iron core blocks 12 with the bottom surface portion 31a facing radially outward.

  Next, the iron core blocks 12 arranged in the circumferential direction are simultaneously moved radially inward. Thereby, each of the teeth 12b of the iron core block 12 is inserted between adjacent rows of the first and second straight portions 22a and 22b, and the side surfaces in the circumferential direction of the adjacent iron core blocks 12 are abutted to each other. As shown in FIGS. 17 and 18, the winding assembly 21 is attached to the stator core 11. In each slot 13, eight first and second straight portions 22 a and 22 b are stored side by side aligned in a row in the radial direction with the long side of the rectangular cross section facing the circumferential direction. .

  In this way, by moving the iron core blocks 12 arranged in the circumferential direction to the inner diameter side and inserting them into the winding assembly 21, the first and second straight portions 22a and 22b arranged unevenly in the radial direction can be obtained. The teeth 12b of the adjacent iron core blocks 12 are aligned by a movement that narrows. Further, the gap between the first and second linear portions 22a and 22b aligned in the radial direction is reduced and eliminated by the movement of the core block 12 toward the inner diameter side of the core back portion 12a. Thereby, the space factor of the conductor wire 25 in the slot 13 can be improved. Moreover, since the iron core block 12 is inserted so that the space | interval between the adjacent teeth 12b becomes narrow gradually, sliding on the contact surface of the stator winding 20 and the iron core block 12 is suppressed, and insulation of the conductor wire 25 is carried out. Damage to the coating can be prevented.

  In the step of inserting the teeth 12b of the iron core block 12 between the rows of the first and second straight portions 22a, 22b from the outer peripheral side of the winding assembly 21, the tapered teeth 12b of the first and second straight portions 22a, 22b are inserted. Since it is inserted from the outer diameter side into each of the rows and moved inward in the radial direction, the winding assembly 21 has the stator in a state where the first and second straight portions 22a and 22b are aligned in one row. Mounted on the iron core 11.

  The stator winding 20 is a distributed winding in which the conductor wire 25 exiting from one slot 13 is wound so as to enter another slot 13 across the continuous six teeth 12b.

  In the stator 10 configured as described above, the slot cell 30 is disposed between the first and second straight portions 22a and 22b arranged in a row and the slot 13, as shown in FIG. The first and second straight portions 22a and 22b are isolated from the iron core block 12 (stator iron core 11). Thereby, electrical insulation between the stator core 11 and the stator winding 20 is ensured. At this time, the refrigerant passage by the recess 33 is formed between the side surface portion 31b of the slot cell 30 and the first and second straight portions 22a and 22b arranged in a row, with the passage direction as the radial direction, It is formed so as to extend from the tip to the bottom surface portion 31a.

  The rotating electrical machine 100 using the stator 10 operates as an 8-pole, 48-slot inner rotor type three-phase motor by supplying predetermined AC power to the stator winding 20. An air flow is generated by the rotation of the rotor 5. Therefore, air flows into the refrigerant passage formed by the recess 33 of the slot cell 30 and flows in the refrigerant passage toward the bottom surface portion 31a. Air flows out in the axial direction through the gap between the first and second straight portions 22a and 22b in the process of flowing in the refrigerant passage toward the bottom surface portion 31a. The heat generated in the stator winding 20 is radiated to the air flowing in the axial direction through the gap between the first and second straight portions 22a and 22b through the refrigerant passage.

  According to this Embodiment 1, the convex part 32 and the recessed part 33 are alternately formed in the inner peripheral surface of the side part 31b of the slot cell 30 in the width direction of the side part 31b, and the surface of the side part 31b is uneven | corrugated shape. Since the heat dissipation of the stator winding 20 can be enhanced without using a special material, the output of the rotating electrical machine 100 can be increased without increasing the manufacturing cost.

  In the winding body 22, the first and second coil ends 22c and 22d are radially spaced at the first and second top portions 22e and 22f by a gap d substantially equal to the radial dimension of the first and second linear portions 22a and 22b. It is configured to shift. Therefore, the winding bodies 22 can be arranged at a 1-slot pitch without interference, and the assemblability of the winding assembly 21 is improved. Further, the radial and axial dimensions of the coil end group are reduced, and the rotating electrical machine 100 can be reduced in size.

  In the first embodiment, air is used as the refrigerant. However, the rotary electric machine 100 may be applied to an application in which oil is filled in the rotary electric machine. In this case, the oil stirred by the rotation of the rotor 5 flows into the refrigerant passage formed by the recess 33 from the inside in the radial direction, flows in the refrigerant passage toward the bottom surface portion 31a, and the first and second linear portions. Since it flows out in the axial direction through the gap between 22a and 22b, the heat dissipation of the stator winding 20 can be enhanced.

  In the first embodiment, the first straight portion 22a and the second straight portion 22b connected via the first and second coil ends 22c and 22d are arranged in the arrangement direction by the first top portion 22e and the second top portion 22f. The first and second straight portions 22a and 22b are displaced by the radial thickness d. However, the amount of radial displacement by the first top 22e and the second top 22f is not limited to d. For example, from the viewpoint of reducing the radial and axial dimensions of the coil end group of the stator winding 20, approximately a × d (where a is 1 or more and (the number of turns of the winding body 22 −1)). The following natural number) is desirable.

  Further, in the first embodiment, the slots 13 are formed at a ratio of two per phase per pole, and the row of the first straight portions 22a and the row of the second straight portions 22b of the winding body 22 has six slots. Although angularly spaced, the spacing between rows is not limited to 6 slot angular spacing. For example, when the slots 13 are formed at a rate of one per pole per phase, the interval between the first straight line portion 22a and the second straight line portion 22b is defined as a three-slot angular interval. In this way, a stator winding having a distributed winding structure with a full-pitch winding can be obtained.

Embodiment 2. FIG.
FIG. 20 is an exploded perspective view for explaining the mounting state of the slot cell in the rotary electric machine according to Embodiment 2 of the present invention.

In FIG. 20, a slot cell 30A includes a first sheet 301 formed by bending a rectangular flat insulating sheet into a U-shape composed of a pair of side surface portions 301b and a bottom surface portion 301a, and a rectangular flat plate. After the insulating sheet is bent into a U-shape consisting of a pair of side surface portions 302b and a bottom surface portion 302a, the second sheet 302 is formed by cutting the side surface portions 302b into strips. The side surface portion 302b of the second sheet 302 is cut into a strip shape.
The rotating electrical machine according to the second embodiment is configured in the same manner as the rotating electrical machine 100 according to the first embodiment except that the slot cell 30A is used instead of the slot cell 30.

In the second embodiment, the second sheet 302 is stacked inside the first sheet 301 and stored in the slot 13 together with the first sheet 301. The notched portion of the side surface portion 302 b corresponds to the concave portion 33 in the slot cell 30. Therefore, a refrigerant passage formed by a notch portion of the side surface portion 302b is provided between the side surface portions 301b and 302b of the slot cell 30A and the first and second straight portions 22a and 22b arranged in a row. As shown in FIG. 3, the side surfaces 301b and 302b are formed so as to reach the bottom surfaces 301a and 302a.
Therefore, the second embodiment can obtain the same effect as the first embodiment.

Embodiment 3 FIG.
FIG. 21 is a cross-sectional view of the main part for explaining the mounting state of the slot cell in the rotary electric machine according to Embodiment 3 of the present invention.

In FIG. 21, the slot cell 30B is formed by forming a rectangular insulating sheet into a U-shape consisting of a pair of side surface portions 311b and a bottom surface portion 311a. The side portions 311b are alternately formed in the length direction (corresponding to the radial direction of the stator core), and the surface of the side portions 311b is formed in an uneven shape. The convex portions 312 and the concave portions 313 are formed simultaneously with the formation of the insulating sheet.
The rotating electric machine according to the third embodiment is configured in the same manner as the rotating electric machine 100 according to the first embodiment except that the slot cell 30B is used instead of the slot cell 30.

In the third embodiment, the refrigerant passage by the concave portion 313 is provided between the side surface portion 311b of the slot cell 30B and the first and second straight portions 22a and 22b arranged in a row, with the passage direction as an axial direction. The side surface portion 311b is formed so as to extend from one end to the other end in the width direction (corresponding to the axial direction of the stator core). Therefore, when the rotor 5 rotates, air or oil flows through the refrigerant passage by the recess 313 and dissipates heat generated in the stator winding 20.
Therefore, the third embodiment can obtain the same effect as the first embodiment.

Embodiment 4 FIG.
FIG. 22 is a cross-sectional view of a main part for explaining the mounting state of the slot cell in the rotary electric machine according to Embodiment 4 of the present invention.

In FIG. 22, a slot cell 30C is formed by forming a rectangular insulating sheet into a U-shape consisting of a pair of side surface portions 321b and a bottom surface portion 321a. The portions 321b are alternately formed in the length direction (corresponding to the radial direction of the stator core), and the surface of the side portion 321b is formed in an uneven shape. The convex portion 322 and the concave portion 323 are formed at the same time as the insulating sheet is formed.
The rotating electric machine according to the fourth embodiment is configured in the same manner as the rotating electric machine 100 according to the first embodiment except that the slot cell 30C is used instead of the slot cell 30.

In the fourth embodiment, a refrigerant passage by the recess 323 is formed between the side surface portion 321b of the slot cell 30C and the inner peripheral surface of the slot 13 with the passage direction being the axial direction (the stator core). It is formed so as to extend from one end to the other end. Therefore, when the rotor 5 rotates, air or oil flows through the refrigerant passage by the recess 323 and dissipates heat generated in the stator winding 20.
Therefore, the fourth embodiment can obtain the same effects as those of the first embodiment.

Embodiment 5 FIG.
FIG. 23 is a cross-sectional view of the main part for explaining the mounting state of the slot cell in the rotary electric machine according to Embodiment 5 of the present invention.

In FIG. 23, the slot cell 30D is formed of a rectangular insulating sheet in a U-shape comprising a pair of side surface portions 331b and a bottom surface portion 331a. The side surface portion 331b is formed by bending a sheet having a uniform thickness, and the convex portion and the concave portion are formed on both sides of the side surface portion 331b in the length direction of the side surface portion 331b (corresponding to the radial direction of the stator core). It is formed alternately. That is, the side surface portion 331b has an uneven shape on both surfaces. This uneven shape is formed simultaneously with the formation of the insulating sheet.
The rotating electric machine according to the fifth embodiment is configured in the same manner as the rotating electric machine 100 according to the first embodiment except that the slot cell 30D is used instead of the slot cell 30.

In the fifth embodiment, between the side surface portion 331b of the slot cell 30D and the inner peripheral surface of the slot 13, and between the side surface portion 331b and the first and second linear portions 22a and 22b arranged in a row. In addition, a refrigerant passage whose axial direction is the passage direction is formed so as to extend from one end to the other end in the width direction of the side surface portion 331b (corresponding to the axial direction of the stator core). Therefore, when the rotor 5 rotates, air or oil flows through the refrigerant passage and radiates heat generated in the stator winding 20.
Therefore, the fifth embodiment can obtain the same effects as those of the first embodiment.

Embodiment 6 FIG.
FIG. 24 is a cross-sectional view of the principal part showing the periphery of the slot of the rotary electric machine according to Embodiment 6 of the present invention.

In FIG. 24, the circumferential widths of the first linear portion 22a ′ and the second linear portion 22b ′ are configured to be narrower than the circumferential widths of the first linear portion 22a and the second linear portion 22b. Then, the first straight portion 22a ′ of one winding body 22 is shifted to one side in the circumferential direction and inserted into the slot 13, and the second straight portion 22b ′ of the other winding body 22 is placed on the other side in the circumferential direction. It is shifted and inserted into the slot 13. Further, a slot cell 30A is disposed in the slot 13.
In addition, the other structure of the rotary electric machine by Embodiment 6 and the structure similar to the rotary electric machine by the said Embodiment 2 are comprised.

  In the sixth embodiment, the first straight portion 22a 'is pressed against the tooth 12b on the circumferential side of the first straight portion 22a via the first and second sheets 301 and 302 of the slot cell 30A. Therefore, a gap is formed on the other side in the circumferential direction of the first straight portion 22a '. The second straight portion 22b 'is pressed against the teeth 12b on the other side in the circumferential direction of the second straight portion 22b' via the first and second sheets 301 and 302 of the slot cell 30A. Therefore, a gap is formed on one side in the circumferential direction of the second straight portion 22b '.

  According to the sixth embodiment, the refrigerant that enters the refrigerant passage by the cutout portion of the side surface portion 302b from the radial direction and flows through the refrigerant passage in the radial direction easily escapes in the axial direction. The heat dissipation is further improved.

In each of the above embodiments, an 8-pole 48-slot motor is described, but the number of poles and the number of slots are not limited to 8-pole 48-slot.
In each of the above embodiments, the winding body is formed by winding the conductor wire spirally for four turns. However, the number of turns of the conductor wire is not limited to four times, and may be two times or more. I just need it.

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 stator winding is constituted by a distributed winding, but the stator winding is not limited to the distributed winding, and may be a wave winding, for example.

In each of the above-described embodiments, the stator winding is described as the armature winding. However, the same effect can be obtained even when applied to the rotor winding.
Moreover, although each said embodiment has demonstrated the case where this application is applied to an electric motor, even if it applies this application to a generator, there exists the same effect.

  DESCRIPTION OF SYMBOLS 10 Stator (armature), 11 Stator core (armature core), 12 Stator winding (armature winding), 13 Slot, 22 Winding body, 22a 1st linear part, 22b 2nd linear part, 22c 1st coil end, 22d 2nd coil end, 22e 1st top part, 22f 2nd top part, 25 Conductor wire 30,30A, 30B, 30C, 30D Slot cell, 31a, 301a, 302a, 311a, 321a, 331a Bottom Part, 31b, 301b, 302b, 311b, 321b, 331b side part, 301 first sheet, 302 second sheet.

Claims (5)

An armature core, an armature winding that is inserted into a slot of the armature core and attached to the armature core, and an armature winding that is attached to each of the slots and inserted into the slot. In a rotating electrical machine comprising an armature having a slot cell for isolating a conductor wire from an inner peripheral surface of the slot,
The slot cell is formed in a U-shape consisting of a pair of side surface portions and a bottom surface portion along the inner peripheral surface of the slot, and has a concavo-convex shape on the surface of the side surface portion opposite to the inner peripheral surface of the slot. Rotating electric machine.   The concavo-convex shape forms a refrigerant passage extending from the inner diameter end of the side surface portion toward the bottom surface portion side between the conductor wire of the armature winding inserted into the slot and the side surface portion. The rotating electric machine according to claim 1, wherein the rotating electric machine is formed. The concavo-convex shape forms a refrigerant passage extending from one axial end of the side surface portion toward the other axial end between the conductor wire of the armature winding inserted into the slot and the side surface portion. The rotating electrical machine according to claim 1, wherein the rotating electrical machine is formed as described above.   The rotating electrical machine according to any one of claims 1 to 3, wherein the uneven shape is formed by overlapping a plurality of insulating sheets. Each of the armature windings is formed by winding the conductor wire m times (where m is a natural number of 2 or more), and the ends of the linear portions are connected by a coil end to form a spiral shape. Distributed windings configured by mounting the body on each of a pair of slots apart from the predetermined number of slots of the armature core,
The coil end has a top portion that is displaced by a predetermined amount in the radial direction at a substantially central portion between the linear portions to be connected, and the amount of displacement in the radial direction at the top portion is approximately a × d (where a is 1). 5. The natural number of (m−1) or less, and d is the radial thickness of the straight portion housed in the slot). 5. Rotating electric machine.

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