JP5026547B2 - Rotating electric machine - Google Patents

Description

  The present invention relates to a rotating electrical machine that is driven by, for example, an internal combustion engine and can be mounted on a passenger car, a truck, or the like.

  In recent years, an AC generator for a vehicle has been required to improve a power generation output due to an increase in vehicle load. To improve this power generation output, two sets of independent three-phase stator windings are used. A vehicle alternator provided is shown (for example, see Patent Document 1).

JP-A-5-308751

  However, in this case, since two sets of stators are arranged in the axial direction of the shaft, there is a problem that the dimension in the axial direction becomes large and the whole size increases.

  An object of the present invention is to solve the above-described problems, and to provide a rotating electrical machine that can be reduced in size while ensuring high output.

  The rotating electrical machine according to the present invention includes a stator core having a plurality of slots extending in the axial direction, a first three-phase Y-Δ mixed winding and a second three-phase Y- wound around the slots. The first three-phase Y-Δ mixed winding includes a first Δ-U winding portion, a first Δ-V winding portion, and a first Δ-W winding. A first Δ connection portion connected in a Δ shape by connecting the respective winding end ends of the first portion, and a second Y connected to a winding end end of the first Δ connection portion in a Y shape. A second U-winding portion, a second Y-V winding portion, and a second Y-W winding portion, and the second three-phase Y-Δ mixed winding has a second Δ-U A second Δ connection portion connected in a Δ shape by connecting the winding end ends of the winding portion, the second Δ-V winding portion, and the second Δ-W winding portion; Connected in Y form to the winding end of 2 Δ connection part A first Y-U winding portion, a first Y-V winding portion, and a first Y-W winding portion, wherein the first Δ-U winding portion, the first 1 YU winding portion is housed in the same slot, and the first Δ-V winding portion and the first YV winding portion are housed in the same slot, The first Δ-W winding portion and the first YW winding portion are housed in the same slot, and the second Δ-U winding portion and the second YU winding portion are accommodated in the same slot. The winding portion is housed in the same slot, and the second Δ-V winding portion and the second YV winding portion are housed in the same slot, and the second Δ- The W winding portion and the second YW winding portion are housed in the same slot.

  According to the rotating electrical machine of the present invention, the first three-phase Y-Δ mixed winding 160a and the second three-phase Y-Δ mixed winding 160b are wound around the single stator core 15. Miniaturization can be achieved while securing high output.

It is sectional drawing which shows the structure of the alternating current generator for vehicles which concerns on Embodiment 1 of this invention. FIG. 2 is a partially cutaway perspective view showing a stator of the vehicle alternator of FIG. 1. It is a connection diagram which shows the connection state for 1 phase of the stator winding | coil in the vehicle alternator of FIG. FIG. 2 is an electric circuit diagram of the vehicle AC generator of FIG. 1. It is sectional drawing which shows the arrangement | sequence state of the conductor in the slot in the stator core of FIG. It is sectional drawing which shows the arrangement | sequence state of the conductor in the slot of the stator core of the alternating current generator for vehicles in Embodiment 2 of this invention. It is a perspective view which shows the joining state of the edge part of the Y connection conductor of FIG. 6, and the edge part of (DELTA) connection conductor. It is a perspective view which shows the joining state of the edge part of the Y connection conductor in the location different from what was shown in FIG. 7, and the edge part of (DELTA) connection conductor. It is a perspective view which shows the joining state different from what was shown in FIG. It is a perspective view which shows the joining state different from what was shown in FIG. It is sectional drawing which shows the stator of the alternating current generator for vehicles in Embodiment 3 of this invention.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In each embodiment, the same, equivalent members, or parts will be described with the same reference numerals.

Embodiment 1 FIG.
1 is a cross-sectional view showing a configuration of an automotive alternator according to Embodiment 1 of the present invention, FIG. 2 is a partial perspective view showing a stator of FIG. 1, and FIG. 3 is a view of a stator winding 16 of FIG. It is a connection diagram which shows the connection state for one phase.

In this vehicular AC generator, a Randall-type rotor 7 is rotatably provided in a case 3 constituted by an aluminum front bracket 1 and a rear bracket 2 via a shaft 6. A stator 8 acting as an armature is fixed to the inner wall surface of the case 3 on the outer peripheral side of the rotor 7 acting as a field. The shaft 6 is rotatably supported by the front bracket 1 and the rear bracket 2. A pulley 4 is fixed to one end of the shaft 6 so that the rotational torque of the engine can be transmitted to the shaft 6 via a belt (not shown). A slip ring 9 for supplying current to the rotor 7 is fixed to the other end of the shaft 6. A pair of brushes 10 housed in the brush holder 11 are in sliding contact with the slip ring 9.
A heat sink 17 is fitted to the brush holder 11. A regulator 18 for adjusting the magnitude of the AC voltage generated in the stator 8 is bonded to the heat sink 17. In the case 3, a rectifier 12 is provided that is electrically connected to the stator 8 and rectifies alternating current generated in the stator 8 into direct current.

The rotor 7 is provided so as to cover the rotor coil 13 that generates a magnetic flux by passing an electric current, and a pair of pole cores 20 that are formed with magnetic poles by the magnetic flux generated by the rotor coil 13. 21. The pair of pole cores 20 and 21 are made of iron, and eight claw-shaped claw-shaped magnetic poles 22 and 23 are projected on the outer peripheral edge at an equiangular pitch in the circumferential direction so that the claw-shaped magnetic poles 22 and 23 are engaged with each other. It is fixed to the shaft 6 so as to face the surface.
Fans 5 are fixed to both end faces of the rotor 7 in the axial direction. Air intake holes 1 a and 2 a are formed on both end surfaces of the front bracket 1 and the rear bracket 2. Exhaust holes 1b and 2b are formed in both shoulder portions of the front bracket 1 and the rear bracket 2.
The stator 8 includes a stator core 15 made of a cylindrical laminated core in which a plurality of axially extending slots 15a are formed at a predetermined pitch in the circumferential direction, and a stator winding 16 wound around the stator core 15. And an insulator 19 which is mounted in each slot 15a and electrically insulates the stator winding 16 and the stator core 15 from each other.

As can be seen from the electric circuit diagram shown in FIG. 4, the stator winding 16 is composed of a first three-phase Y-Δ mixed winding 160a and a second three-phase Y-Δ mixed winding 160b. Yes.
The first three-phase Y-Δ mixed winding 160a and the second three-phase Y-Δ mixed winding 160b are wound around the slot 15a of the stator core 15 with a phase difference of about 30 degrees in electrical angle. Has been.
As can be seen from the connection diagram shown in FIG. 3, the stator winding portion 161 composed of the first three-phase Y-Δ mixed winding 160 a and the second three-phase Y-Δ mixed winding 160 b is 1 The first to sixth winding portions 31 to 36 formed of a continuous line 30 are configured.

The first winding portion 31 is the first position from the inner periphery side in the slot 15a (hereinafter referred to as the first address) of the continuous wire 30 as a conductor every six slots from slot numbers 1 to 91. And the second position from the inner circumference side (hereinafter referred to as address 2) are alternately wound and the ends of the continuous wire 30 are joined together to form a one-turn full-pitch winding. is doing.
The second winding portion 32 winds the continuous wire 30 in a full-pitch manner so that the second address and the first address in the slot 15a are alternately taken every six slots from slot numbers 1 to 91, The ends of the continuous wire 30 are joined together to form a one-turn full-pitch winding.
The third winding portion 33 is configured to connect the continuous wire 30 to the third position from the inner periphery side in the slot 15a (hereinafter referred to as address 3) and the inner periphery every six slots from slot numbers 1 to 91. Full-wave winding so as to alternately take the fourth position from the side (hereinafter referred to as address 4), and joins the ends of the continuous wire 30 to form a one-turn full-wave winding. ing.
The fourth winding section 34 winds the continuous wire 30 in full-pitch so as to alternately take the address 4 and address 3 in the slot 15a every 6 slots from slot numbers 1 to 91, The ends of the continuous wire 30 are joined together to form a one-turn full-pitch winding.
The fifth winding portion 35 is configured to connect the continuous wire 30 to the fifth position from the inner peripheral side in the slot 15a (hereinafter referred to as address 5) and the inner peripheral line every six slots from slot numbers 1 to 91. Full-wave winding so that the sixth position from the side (hereinafter referred to as address 6) is taken alternately, and the ends of the continuous wire 30 are joined together to form a one-turn full-wave winding. Tei Ru.
The sixth winding portion 36 winds the continuous wire 30 in a full-pitch manner so as to alternately take the 6th address and the 5th address in the slot 15a every 6 slots from slot numbers 1 to 91, The ends of the continuous wire 30 are joined together to form a one-turn full-pitch winding.

In each slot 15a, as shown in FIG. 5, six continuous lines 30 as conductors are arranged in a line in the radial direction with the longitudinal direction of the rectangular cross section aligned in the radial direction.
In this way, each continuous line 30 constituting the first to sixth winding portions 31 to 36 extends from one slot 15a to the end face side of the stator core 15, and is folded back to be a slot separated by six slots. It is wound in a full-pitch winding so as to enter 15a, and every six slots are wound so that the inner layer and the outer layer are alternately taken in the slot 15a in the slot depth direction (radial direction).
Moreover, each turn part 30a of the continuous line 30 extended and turned to the end surface side of the stator core 15 forms the coil end part. At both end sides of the stator core 15, the turn portions 30a formed in substantially the same shape are circumferentially separated from each other in the radial direction, and are arranged in three rows in an orderly manner in the circumferential direction. 16f and 16r are formed.

In this embodiment, the portion of the continuous line 30 of the second, fourth and sixth winding portions 32, 34, 36 extending from the slot numbers 61 and 67 to one end side of the stator core 15. The portions of the continuous line 30 of the first, third and fifth winding portions 31, 33, 35 extending from the slot numbers 67 and 73 to one end side of the stator core 15 are cut off. After cutting, the cut end portion 31a of the first winding portion 31 and the cut end portion 32b of the second winding portion 32 are joined, and the first and second winding portions 31, 32 are connected in series. A two-turn first series connection winding portion 162a thus formed is formed. An end portion 31b opposite to the cut end portion 31a of the first winding portion 31 and an end portion 32a opposite to the cut end portion 32b of the second winding portion 32 extend from the stator core 15 in the axial direction. It is extended.
Similarly, the cut end portion 33a of the third winding portion 33 and the cut end portion 35b of the fifth winding portion 35 are joined, and the cut end portion 34a of the fourth winding portion 34 and the sixth winding portion 34 are joined. The cut end portion 36b of the wire portion 36 is joined, and the cut end portion 35a of the fifth winding portion 35 and the cut end portion 34b of the fourth winding portion 34 are joined, and the third, fourth, A four-turn second series connection winding portion 162b formed by connecting the fifth and sixth winding portions 33, 34, 35, and 36 in series is formed. An end portion 33b opposite to the cut end portion 33a of the third winding portion 33 and an end portion 36a opposite to the cut end portion 36b of the sixth winding portion 36 extend from the stator core 15 in the axial direction. I'm out.
In this way, one phase of the stator winding 16 is formed, but the other five phases are similarly formed by shifting the slot 15a around which the continuous wire 30 is wound one by one. .

Each of the four-turn second series-connected winding portions 162b includes the first Δ-U winding portion 50a, the second Δ-U winding portion 50b, and the first Δ-V shown in FIG. A winding part 51a, a second Δ-V winding part 51b, a first Δ-W winding part 52a, and a second Δ-W winding part 52b are configured.
Further, each of the first series connection winding portions 162a of two turns includes a first YU winding portion 53a, a second YU winding portion 53b, and a first YV winding portion 54a. The second YV winding portion 54b, the first YW winding portion 55a, and the second YW winding portion 55b are configured.

  In the first three-phase Y-Δ mixed winding 160a, each of the first Δ-U winding portion 50a, the first Δ-V winding portion 51a, and the first Δ-W winding portion 52a is Δ The first Δ connection portion is configured by connecting the first YU connection portion, the second YU winding portion 53b, the second YV winding portion 54b, and the second Y connection portion. The -W winding portion 55b is connected in a Y shape. The other end portions of the second YU winding portion 53b, the second YV winding portion 54b, and the second YW winding portion 55b are respectively connected via an output line 70 having a circular cross section. The rectifier 12 is connected.

  In the second three-phase Y-Δ mixed winding 160b, each of the second Δ-U winding portion 50b, the second Δ-V winding portion 51b, and the second Δ-W winding portion 52b is Δ The second Δ connection portion is configured by connecting the first Y-U winding portion 53a, the first YV winding portion 54a, and the first Y connection portion to the second Δ connection portion. The -W winding 55a is connected in a Y shape. The other end of each of the first YU winding part 53a, the first YV winding part 54a, and the first YW winding part 55a is connected to each rectifier 12 via an output line 70. It is connected.

As shown in FIG. 5, the first ΔU winding part 50a and the first YU winding part 53a are accommodated in the same slot 15a. In the slot 15a adjacent to the right of the slot 15a, the second Δ-U winding part 50b and the second YU winding part 53b are accommodated in the same slot 15a.
Although not shown in FIG. 5, each slot 15a further includes a first Δ-V winding portion 51a, a first YV winding portion 54a, and a second Δ-V winding in the clockwise direction. Line portion 51b and second YV winding portion 54b, first ΔW winding portion 52a and first YW winding portion, second ΔW winding portion 52b and second portion The YW winding part 55b is accommodated sequentially.
In this way, in each slot 15a, the first three-phase Y-Δ mixed winding 160a and the second three-phase Y-Δ mixed winding 160b have the same phase winding portions as U phase, V phase, and W phase, respectively. Stored clockwise in phase order.

In each slot 15a, as shown in FIG. 5, the first YU winding part 53a, the second YU winding part 53b, the first YV winding part 54a, the second The Y connection conductors constituting the YV winding part 54b, the first YW winding part 55a, and the second YW winding part 55b are respectively the first Δ-U winding part 50a, The second Δ-U winding part 50b, the first Δ-V winding part 51a, the second Δ-V winding part 51b, the first Δ-W winding part 52a and the second Δ-W It arrange | positions rather than the (DELTA) connection conductor which each comprises the coil | winding part 52b in the inner diameter side.
The output line 70 connected to the rectifier 12 extends from the innermost layer in the slot 15a.

In the vehicular AC generator configured as described above, a current is supplied from a battery (not shown) to the rotor coil 13 via the brush 10 and the slip ring 9, and a magnetic flux is generated. By this magnetic flux, the claw-shaped magnetic pole 22 of one pole core 20 is magnetized to the N pole, and the claw-shaped magnetic pole 23 of the other pole core 21 is magnetized to the S pole. On the other hand, the rotational torque of the engine is transmitted to the shaft 6 via the belt and the pulley, and the rotor 7 is rotated. Therefore, a rotating magnetic field is applied to the stator winding 16 and an electromotive force is generated in the stator winding 16. The alternating electromotive force is rectified to direct current through the rectifier 12, and after being synthesized, the magnitude thereof is adjusted by the regulator 18, and the battery is charged.
Further, due to the rotation of the centrifugal fan 5 fixed to both end faces in the axial direction of the rotor 7, on the rear bracket 2 side, outside air is sucked through the intake holes 2a to cool the rectifier 12 and the regulator 18, and then the fan 5 Is bent in the centrifugal direction to cool the coil end group 16r of the stator winding 16, and is discharged to the outside through the exhaust hole 2b.
On the front bracket 1 side, outside air is sucked through the intake hole 1a and then bent in the centrifugal direction by the fan 5 to cool the coil end group 16f of the stator winding 16 and discharged to the outside through the exhaust hole 1b. The

  According to the vehicle alternator of this embodiment, the first three-phase Y-Δ mixed winding 160a and the second three-phase Y-Δ mixed winding 160b are wound around the single stator core 15. Unlike the conventional one having a plurality of stators, the axial dimension can be shortened, and the vehicle alternator is downsized. In addition, the wiring work between the stators that is conventionally required is not required, and the wiring work can be easily performed on the coil end group 16r of the stator windings 16.

  Further, the first three-phase Y-Δ mixed winding 160a and the second three-phase Y-Δ mixed winding 160b are arranged so as to have a phase difference of approximately 30 degrees in electrical angle, and magnetic excitation is performed. The harmonic components 5f and 7f of the force are canceled out and the electromagnetic sound is reduced.

Moreover, since the stator winding part 161 is composed of full-pitch windings, the harmonic components 5f and 7f of the magnetic excitation force are completely canceled, and electromagnetic noise is reduced.
It should be noted that even if all the winding portions are configured with short-pitch windings and configured so that the number of conductors in all slots is equal, the same effect can be obtained.

  Further, the AC outputs of the first three-phase Y-Δ mixed winding 160a and the second three-phase Y-Δ mixed winding 160b are rectified independently by the first and second rectifiers 12, respectively, and then combined. Therefore, high output power can be obtained.

Further, if the turn ratio of the Y-connection conductor and the Δ-connection conductor is set to 1: √3, the harmonic components 5f and 7f of the magnetic excitation force are completely canceled out, but precisely set to 1: √3. The first series-connected winding part 162a Y-connected has two turns, and the second series-connected winding part 162b Δ-connected has four turns.
In this embodiment, when one of the first three-phase Y-Δ mixed windings 160a fails due to an integer ratio close to 1: √3, that is, set to 1: 2, the other second three-phase Since the harmonic components 5f and 7f of the magnetic excitation force are canceled only by the operation of the Y-Δ mixed winding 160b, the electromagnetic noise is low and the passenger does not have a great discomfort.

  Further, the continuous wire 30 is wound into a wave winding every six slots in the slot 15a so as to alternately take the inner layer and the outer layer in the slot depth direction (radial direction), and the winding portions 31 to 36 are wound. Further, in each of the winding portions 31 to 36, the Δ connection conductor and the Y connection conductor having an even number of turns are separated, and the winding property is good.

  Further, each continuous line 30 is arranged in the slot 15a with the longitudinal direction of the rectangular cross section aligned in the radial direction, so that the space factor is high and the output efficiency of the generator is improved.

  Further, since the winding portions 53a, 53b, 54a, 54b, 55a, 55b of the Y connection portion having a high current density are arranged on the inner diameter side of the stator core 15 and are close to the fan 5, the current density is high The winding portions 53a, 53b, 54a, 54b, 55a, and 55b of the Y connection portion are efficiently cooled, and uneven temperature distribution in the stator winding 16 can be prevented.

Further, since the output line 70 connected to the rectifier 12 is extended from the innermost layer in the slot 15a, a sufficient distance between the output line 70 and the rear bracket 2 can be secured, and the output line which is an AC output end. Leakage current between 70 and the grounded rear bracket 2 can be prevented, and rusting or electrolytic corrosion can be prevented.
Since the stator core 15 is fitted to the inner peripheral side of the aluminum front bracket 1 and rear bracket 2, the conductor of the Y connection portion having a higher current density is arranged on the outer diameter side and has a rectangular cross section. The three conductors arranged on the outermost diameter side among the conductors may be accommodated in the slot in close contact with the inner wall surface of the slot 15a through the insulator 19 with almost no gap.
In this case, the heat generated in the Y connection conductor is released to the outside through the stator core and the bracket, and the Y connection conductor is efficiently cooled.

  Moreover, you may make it further improve the cooling effect of a conductor by forming a radiation fin in the outer peripheral surface of a bracket in the vicinity of a stator core.

Embodiment 2. FIG.
FIG. 6 is a cross-sectional view of a main part of an automotive alternator according to Embodiment 2 of the present invention.
In the vehicular AC generator according to the second embodiment, the first Δ-U winding part 150a, the second Δ-U winding part 150b, the first Δ-V winding part, and the second Δ- The V winding portion, the first Δ-W winding portion, and the second Δ-W winding portion are configured by two turns of the first continuous line that is the Δ connection conductor, and the first Y -U winding portion 153a, second YU winding portion 153b, first YV winding portion, second YV winding portion, first YW winding portion and second The Y-W winding portion 155b is configured by turning a second continuous line, which is a Y connection conductor made of a conductor having a cross-sectional area different from that of the first continuous line, into two turns.
Further, the cross-sectional area of the conductor of the second continuous line is configured to be approximately √3 times the cross-sectional area of the conductor of the first continuous line.

In the vehicular AC generator according to the second embodiment, the density of the generated currents of the winding portions 150a, 150b, and 152b in the Δ connection portion and the density of the generated currents of the winding portions 153a, 153b, and 155b in the Y connection portion. Is substantially equal, and the temperature distribution of the stator winding 16 is substantially uniform.
Further, end portions 132a of the second YU winding portion 153b, the second YV winding portion, and the second YW winding portion 155b, respectively, which are Y-connected to the Δ connection portion. Is linearly extended in the direction of the 15 axis of the stator core, and a first Δ-U winding portion 150b and a first Δ-V winding are formed on both sides of the end portion 132a as shown in FIG. And end portions 133b and 136a of the first Δ-W winding portion are joined by surface contact.
Further, at other locations where the Δ connection portion is connected in a Y shape, as shown in FIG. 8, both end portions 133b and 136a are joined to one side of the end portion 132a by surface contact.
In addition, you may make it these joining join by TIG (tungsten inert gas) welding in the state which each edge part 132a, 133b, 136a comprised with oxygen free copper contacted each other.

  In this manner, the end portions 132a, 133b, and 136a are fusion-bonded by surface contact and have a large contact area, so that heat generation at the end portions 132a, 133b, and 136a can be suppressed.

Further, the end portions 132a of the second YU winding portion 153b, the second YV winding portion, and the second YW winding portion 155b protrude in the axial direction from the coil end group 16r. Thus, the end portion 132a is not damaged by the coating peeling.
Further, the end portion 132a is reinforced by the end portions 133b and 136a, and the end portions 132a, 133b, and 136a are firmly coupled to each other.

As shown in FIGS. 9 and 10, the end portion 132a, the end portion 133b, and the end portion 136a are surrounded by a belt-like ring 60 made of a carbon steel plate to which tin having a thin coating is attached, and are firmly connected to each other by pressure welding. You may make it join to.
Note that the end 133b and the end 136a having a quadrangular cross section may have a circular cross section. In this case, the end 133b and the end 136a having a circular cross section can be bent and deformed in an arbitrary direction, and the degree of freedom of wiring connection is improved accordingly.

  7 to 10, the Δ connection portion and the end portions of the second YU winding portion 153 b, the second YV winding portion, and the second YW winding portion 155 b, respectively. The bonding state with the 132a has been described, but the Δ connection portion and the ends of the first YU winding portion, the first YV winding portion, and the first YW winding portion, respectively. Also in the middle, they are joined in the same form.

Embodiment 3 FIG.
FIG. 11 is a cross-sectional view of a main part of an automotive alternator according to Embodiment 3 of the present invention.
In the vehicular AC generator according to the third embodiment, the Y coil end portion 120a which is the coil end of the Y connection portion disposed on the inner diameter side of the stator winding 16 is disposed on the outer diameter side. It is longer in the axial direction than the Δ coil end portion 120b which is the coil end.

  By doing in this way, the Y coil end portion 120a having the higher current density approaches the centrifugal fan 5, the collision flow of the cooling air is further increased, the Y connection portion is cooled more efficiently, and the stator winding 16 is cooled. It is possible to prevent the occurrence of uneven temperature distribution.

In each of the above embodiments, each winding portion is formed of a continuous line, but a pair of straight portions that fit within the slot, a connecting portion that connects the straight portions, and a tip portion of the straight portion. A winding portion may be configured by connecting a plurality of conductor segments formed in a substantially U shape including a connecting portion provided and protruding from one end surface of the stator core.
Further, although the vehicle AC generator has been described as the rotating electrical machine, the present invention can of course be applied to an electric motor and a generator motor that are rotating electrical machines.

  1 Front bracket, 2 Rear bracket, 3 Case, 6 Shaft, 7 Rotor, 8 Stator, 12 Rectifier, 15 Stator core, 15a Slot, 16 Stator winding, 19 Insulator, 30 Continuous wire, 31 1st Winding part, 32 Second winding part, 33 Third winding part, 34 Fourth winding part, 35 Fifth winding part, 36 Sixth winding part, 50a First Δ- U winding portion, 50b second Δ-U winding portion, 51a first Δ-V winding portion, 51b second Δ-V winding portion, 52a first Δ-W winding portion, 52b Second Δ-W winding section, 53a First YU winding section, 53b Second YU winding section, 54a First YV winding section, 54b Second YV Winding portion, 55a First YW winding portion, 55b Second YW winding portion, 70 output line, 150a First ΔU winding portion, 15 0b Second Δ-U winding part, 153a First YU winding part, 153b Second YU winding part, 155b Second Y-W winding part, 160a First three-phase Y-Δ mixed winding, 160b second three-phase Y-Δ mixed winding, 161 stator winding, 162a first series connection winding, 162b second series connection winding.

Claims (14)

A stator core having a plurality of slots extending in the axial direction;
A first three-phase Y-Δ mixed winding and a second three-phase Y-Δ mixed winding wound in the slot;
The first three-phase Y-Δ mixed winding includes winding end ends of the first Δ-U winding portion, the first Δ-V winding portion, and the first Δ-W winding portion, respectively. And a second YU winding portion connected in a Y-shape to the winding end of the first Δ-connection portion, a second YU winding portion, YV winding part and second YW winding part,
The second three-phase Y-Δ mixed winding includes winding end ends of the second Δ-U winding portion, the second Δ-V winding portion, and the second Δ-W winding portion, respectively. And a first YU winding portion connected in a Y shape to the winding end of the second Δ connection portion, and a first YU winding portion, YV winding part and first YW winding part,
The first ΔU winding portion and the first YU winding portion are housed in the same slot, and the first ΔV winding portion and the first YV winding portion are accommodated in the same slot. The wire portion is housed in the same slot, the first Δ-W winding portion and the first YW winding portion are housed in the same slot,
Further, the second Δ-U winding portion and the second YU winding portion are housed in the same slot, and the second Δ-V winding portion, the second Y-- A rotating electrical machine in which the V winding portion is housed in the same slot, and the second Δ-W winding portion and the second Y-W winding portion are housed in the same slot.   The first three-phase Y-Δ mixed winding and the second three-phase Y-Δ mixed winding have a phase difference of about 30 degrees in electrical angle and are wound around the slots of the stator core. The rotating electrical machine according to claim 1.   3. The rotating electrical machine according to claim 2, wherein each of the winding portions includes a conductor having a full-pitch winding, and each slot includes the same number of conductors.   4. The rotating electrical machine according to claim 3, wherein the first three-phase Y-Δ mixed winding and the second three-phase Y-Δ mixed winding are individually electrically connected to a rectifier.   The first YU winding part, the first YV winding part, the first YW winding part, the second YU winding part, the second Y- The number of turns of each conductor of the V winding portion and the second YW winding portion, the first Δ-U winding portion, the first Δ-V winding portion, and the first Δ The ratio of the number of turns of each conductor of the -W winding portion, the second Δ-U winding portion, the second Δ-V winding portion, and the second Δ-W winding portion is 1 The rotating electrical machine according to any one of claims 1 to 4, wherein the rotating electrical machine is 2.   The rotating electrical machine according to any one of claims 1 to 5, wherein each winding portion has an even number of windings of conductors. A fan for cooling the stator winding is attached to an end face of the rotor rotatably provided inside the stator,
Within each of the slots, the first YU winding portion, the first YV winding portion, the first YW winding portion, the second YU winding portion, The Y connection conductors constituting the second YV winding part and the second YW winding part are the first Δ-U winding part and the first ΔV winding, respectively. Section, the first Δ-W winding section, the second Δ-U winding section, the second Δ-V winding section, and the Δ constituting the second Δ-W winding section. The rotating electrical machine according to claim 1, wherein the rotating electrical machine is disposed closer to the inner diameter side than the connection conductor. Within each of the slots, the first YU winding portion, the first YV winding portion, the first YW winding portion, the second YU winding portion, The Y connection conductors constituting the second YV winding part and the second YW winding part are the first Δ-U winding part and the first ΔV winding, respectively. Section, the first Δ-W winding section, the second Δ-U winding section, the second Δ-V winding section, and the Δ connection constituting the second Δ-W winding section Placed on the outer diameter side of the conductor,
The three sides of the Y-connection conductor having a rectangular cross section arranged on the outermost diameter side are housed in the slot in close contact with the inner wall surface via an insulator. The rotating electrical machine described in 1.   The first YU winding part, the first YV winding part, the first YW winding part, the second YU winding part, the second Y- Each end portion of the V winding portion and the second YW winding portion extends from the innermost diameter side in the slot, and each end portion is connected to the inner diameter side of the stator via an output line. The rotating electrical machine according to any one of claims 1 to 8, wherein the rotating electrical machine is electrically connected to a rectifier provided on the rotating electrical machine.   The rotating electrical machine according to claim 9, wherein the output line has a circular cross section.   The end portions of the second YU winding portion, the second YV winding portion, and the second YW winding portion, respectively, which are Y-connected to the first Δ connection portion, The first Δ-U winding portion, the first Δ-U winding portion, which extends linearly in the axial direction from the stator core, has a rectangular cross-sectional shape, and is connected to each of the end portions. The end portions of each of the -V winding portion and the first Δ-W winding portion have a rectangular cross-sectional shape, and the end portions are joined to each other by surface contact. The rotating electrical machine according to any one of the preceding claims.   The end portions of the second YU winding portion, the second YV winding portion, and the second YW winding portion, respectively, which are Y-connected to the first Δ connection portion, The first Δ-U winding portion, the first Δ-U winding portion, which extends linearly in the axial direction from the stator core, has a rectangular cross-sectional shape, and is connected to each of the end portions. The end portion of each of the -V winding portion and the first Δ-W winding portion has a circular cross-sectional shape, and the end portions are joined to each other. The rotating electrical machine according to the item.   The rotary electric machine according to claim 11 or 12, wherein each of the end portions is surrounded by a ring made of a carbon steel plate coated with tin, and the end portions are joined by pressing of the ring. . A fan for cooling the stator winding is attached to an end face of the rotor rotatably provided inside the stator,
A coil end of the stator winding extending in an axial direction from both end faces of the stator core includes the first YU winding portion, the first YV winding portion, and the first Y-W winding portion, second Y-U winding portion, second Y-V winding portion, and Y-coil end portion that is a coil end portion of second Y-W winding portion And the first Δ-U winding portion, the first Δ-V winding portion, the first Δ-W winding portion, the second Δ-U winding portion, the second A Δ-V winding portion and a Δ coil end portion which is a coil end portion of the second Δ-W winding portion;
14. The rotating electrical machine according to claim 1, wherein a length of the Y coil end portion in the axial direction is longer than a length of the Δ coil end portion in the axial direction.

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