JP2019129637A - Rotary electric machine - Google Patents

Abstract

To improve cooling efficiency of a coil of a rotary electric machine.SOLUTION: A rotary electric machine (a motor) M includes: a shaft S; a first stator 2A including a first coil 91 disposed around the shaft, a second coil located at the inner periphery side of the first coil 92, cores 81, 82, 83 which are disposed while forming spaces with the first and second coils, and a support plate which supports the first and second coils and the cores and has a ventilation port communicating with the spaces between the first and second coils and the cores; a first rotor 1A having a first surface and a second surface which is located at the opposite side of the first surface and faces the first stator through a first space and fixed to the shaft; a second rotor 1B having a third surface facing the first stator through a second space and a fourth surface located at the opposite side of the third surface and fixed to the shaft; and a housing 10 which encloses the first and second rotors and the first stator in an airtight manner and has a ventilation flue.SELECTED DRAWING: Figure 2

Description

  Embodiments of the present invention relate to a rotating electrical machine.

  As an example of a rotating electrical machine, an axial gap motor is known in which a stator and a rotor connected to a shaft are disposed opposite to each other in the axial direction of the shaft with a gap. The stator includes a coil wound around a shaft, and a core that is intermittently disposed in the circumferential direction on the inner peripheral side and the outer peripheral side of the coil. The coil and the core are supported by a support plate made of a nonmagnetic material. Since nonmagnetic materials have lower thermal conductivity than metals and the like, it is necessary to secure a sufficient heat dissipation path for the heat generated from the coil and core during operation of the motor.

JP 2017-55556 A

  Since the coil is configured to be supported by a non-magnetic material from an electromagnetic viewpoint, it may be difficult to sufficiently cool the coil.

  The present invention has been made in view of these problems, and it is an object of the present invention to provide a rotating electrical machine capable of improving the cooling efficiency of a coil.

  A rotating electrical machine according to one embodiment includes a shaft, a first coil wound around the shaft, and a second coil wound around the shaft and positioned on the inner circumferential side of the first coil; A core disposed between the first coil and the second coil via a gap; and the first coil, the second coil, and the core are supported, and the first coil and the core A first stator provided with a gap between the first coil and a support plate having a vent communicating with the gap between the second coil and the core, a first surface, and a position opposite to the first surface A second rotor facing the first stator via a first gap, and facing a first rotor fixed to the shaft via the first stator and a second gap A second surface having a third surface and a fourth surface opposite to the third surface, the second surface being fixed to the shaft A rotor, a first bottom surface that hermetically surrounds the first rotor, the second rotor, and the first stator, and is positioned on a first surface side of the first rotor; and the second rotation A second bottom surface located on the fourth surface side of the child and opposite to the first bottom surface; a side portion located between the first bottom surface and the second bottom surface; and a first surface located on the first bottom surface. A housing having a hole and a second hole located in the second bottom surface.

FIG. 1 is a perspective view schematically showing an example of an appearance configuration of a motor according to the present embodiment. FIG. 2 is a longitudinal sectional view of the motor shown in FIG. FIG. 3 is a schematic cross-sectional view of the motor. FIG. 4 is a schematic perspective view of the first rotor shown in FIG. FIG. 5 is a schematic perspective view of the first stator shown in FIG. 2. FIG. 6 is a schematic exploded perspective view of the first stator. FIG. 7 is a schematic plan view for explaining the positional relationship between the ventilation holes of the second support plate and the respective members of the first stator. FIG. 8 is a schematic cross-sectional view of the first stator taken along the line in FIG. FIG. 9 is a schematic cross-sectional view of the first stator taken along the line in FIG. FIG. 10 is a perspective view schematically showing a first modification of the motor according to the present embodiment. FIG. 11 is a longitudinal sectional view of the motor shown in FIG. FIG. 12 is a perspective view showing a configuration example of a connecting member applied to the motor shown in FIG. FIG. 13 is a perspective view schematically showing a second modification of the motor according to the present embodiment. FIG. 14 is a longitudinal sectional view of the motor shown in FIG. FIG. 15 is a perspective view illustrating a configuration example of a connecting member applied to the motor illustrated in FIG. 14. FIG. 16 is a view showing an application example of the motor according to the present embodiment. FIG. 17 is a plan view schematically showing a third modification of the motor according to the present embodiment. FIG. 18 is a plan view schematically showing a fourth modification of the motor according to the present embodiment. FIG. 19 is a schematic cross-sectional view of the first stator taken along the line in FIG.

  Hereinafter, the present embodiment will be described with reference to the drawings. It should be noted that the disclosure is merely an example, and those skilled in the art can easily conceive of appropriate changes while maintaining the gist of the invention are naturally included in the scope of the present invention. In addition, for the sake of clarity, the drawings may be schematically represented with respect to the width, thickness, shape, etc. of each part as compared to actual aspects, but are merely examples, and The interpretation is not limited. In addition, in the present specification and each drawing, components that perform the same or similar functions as those described above with reference to the previous drawings are denoted by the same reference numerals, and repeated detailed description may be omitted as appropriate. .

  One embodiment will be described with reference to the drawings.

  In the present embodiment, an axial gap motor is disclosed as an example of a rotating electrical machine. However, part of the structure shown in the present embodiment can also be applied to other types of rotating electrical machines.

  FIG. 1 is a perspective view schematically showing an example of an appearance configuration of a motor M according to the present embodiment.

  The motor M includes a housing 10, a shaft S, and a connecting member 90. In the present specification, a direction parallel to the rotation axis AX of the shaft S is taken as an axial direction, and a direction perpendicular to the rotation axis AX and radially extending from the rotation axis AX is taken as a radial direction.

  The housing 10 includes a first housing 10A, a second housing 10B, a third housing 10C, a fourth housing 10D, a first frame 20A, a second frame 20B, and a third frame 20C.

  The first frame 20A is disposed between the first housing 10A and the second housing 10B, and has a first surface SF1 facing the first housing 10A and a second surface SF2 facing the second housing 10B. doing. The second frame 20B is disposed between the second housing 10B and the third housing 10C, and has a third surface SF3 facing the second housing 10B and a fourth surface SF4 facing the third housing 10C. doing. The third frame 20C is disposed between the third housing 10C and the fourth housing 10D, and has a fifth surface SF5 facing the third housing 10C and a sixth surface SF6 facing the fourth housing 10D. doing.

  The first housing 10A has a cylindrical shape with a bottom, and has a first bottom surface BS1 and a first flange portion 101A fixed to the first surface SF1 at one open end. The second housing 10B is cylindrical and has a second flange portion 101B fixed to the second surface SF2 on one open end side, and a third flange portion 102B fixed to the third surface SF3 on the other open end side. ,have. The third housing 10C has a cylindrical shape, and has a fourth flange portion 101C fixed to the fourth surface SF4 at one open end, and a fifth flange portion 102C fixed to the fifth surface SF5 at the other open end. ,have. The fourth housing 10D has a bottomed cylindrical shape, and includes a second bottom surface BS2 and a sixth flange portion 101D fixed to the sixth surface SF6 at one open end. Of the first to fourth housings and the first to third frames, a portion located between the first bottom surface BS1 and the second bottom surface BS2 corresponds to the side portion SD of the housing 10. The second bottom surface BS2 is located on the opposite side of the first bottom surface BS1 via the side portion SD in the axial direction. The first to sixth flanges protrude in the radial direction with respect to the cylindrical first to fourth housings. As described above, the first housing 10A and the second housing 10B are fixed to the first frame 20A, the second housing 10B and the third housing 10C are fixed to the second frame 20B, and the third frame 20C is fixed to the third frame 20C. The airtightness of the inside of the motor M is maintained by fixing the third housing 10C and the fourth housing 10D.

  The first housing 10A has an intake port 14 (first hole, shown in FIG. 2) not shown. The fourth housing 10D has an exhaust port 8 (second hole). In the illustrated example, the four exhaust ports 8 are located at equal intervals in the circumferential direction. The connecting member 90 has a bottomed cylindrical shape, and one open end is fixed to the fourth housing 10D. A space between the connecting member 90 and the fourth housing 10 </ b> D is connected to the exhaust port 8. The connecting member 90 has a connecting member exhaust port 80. The air discharged from the exhaust port 8 to the space inside the connecting member 90 is discharged from the connecting member exhaust port 80 to the flexible duct 6. A blower not shown is connected to the flexible duct 6. For example, when the motor M is mounted on a vehicle such as a train, when the vehicle curves in the traveling direction, the relative position between the motor and the vehicle changes and a rotational displacement difference occurs. The flexible duct 6 can absorb the difference in rotational displacement, and can suppress the movement of the vehicle from affecting the ventilation in the motor M.

  The shaft S is passed through the center of the first to fourth housings, the first to third frames, and the connecting member 90, and the first housing 10A, the first frame 20A, the second housing 10B, the second frame 20B, and the third housing. 10C, the third frame 20C, the fourth housing 10D, and the connecting member 90 are arranged in this order along the rotation axis AX.

  Through holes H are provided at four corner portions of each of the first to third frames. The motor M is fixed to the installation site, for example, using these through holes H. Although FIG. 1 shows a state in which the through holes H below the first frame 20A and the third frame 20C are connected to the fixture F at the installation location, the installation method of the motor M is not limited to this.

  FIG. 2 is a longitudinal sectional view of the motor M shown in FIG. FIG. 2 shows a configuration above the shaft S of the motor M shown in FIG.

  In addition to the configuration shown in FIG. 1, the motor M further includes a first rotor 1A, a second rotor 1B, a third rotor 1C, a fourth rotor 1D, a first stator 2A, and a second stator. 2B, a third stator 2C, and a bearing 200. The first rotor 1A, the first stator 2A, the second rotor 1B, the second stator 2B, the third rotor 1C, the third stator 2C, and the fourth rotor 1D Along the line through the gap in order. The shaft S is rotatably supported by the first housing 10A and the fourth housing 10D via a bearing 200.

  The first rotor 1A is surrounded by the first housing 10A. The first rotor 1A has a first surface SF11 opposite to the first bottom surface BS1 and a second surface SF12 opposite to the first surface SF11. The second surface SF12 faces the first stator 2A via the first gap GP1. The second rotor 1B is surrounded by the second housing 10B. The second rotor 1B has a third surface SF13 and a fourth surface SF14 located on the opposite side of the third surface SF13. The third surface SF13 faces the first stator 2A via the second gap GP2, and the fourth surface SF14 faces the second stator 2B via the third gap GP3. The third rotor 1C is surrounded by the third housing 10C. The third rotor 1C has a fifth surface SF15 and a sixth surface SF16 located on the opposite side of the fifth surface SF15. The fifth surface SF13 faces the second stator 2B via the fourth gap GP4, and the sixth surface SF16 faces the third stator 2C via the fifth gap GP5. The fourth rotor 1D is surrounded by a fourth housing 10D. The fourth rotor 1D has a seventh surface SF17 and an eighth surface SF18 opposite to the seventh surface SF17 and opposite to the second bottom surface BS2. The seventh surface SF17 faces the third stator 2C via the sixth gap GP1.

  The first rotor 1A includes a rotor base 11A fixed to the shaft S, and a permanent magnet 12 fixed to the surface of the rotor base 11A facing the first stator 2A. The second rotor 1B includes a rotor base 11B fixed to the shaft S, a surface facing the first stator 2A of the rotor base 11B, and a permanent magnet 12 fixed to a surface facing the second stator 2B. Is equipped. The third rotor 1C includes a rotor base 11C fixed to the shaft S, a surface facing the second stator 2B of the rotor base 11C, and a permanent magnet 12 fixed to a surface facing the third stator 2C. Is equipped.

  The rotor base 11A has a first air passage 77A axially penetrating between the permanent magnet 12 and the shaft S. The first ventilation path 77A communicates with the space between the first bottom surface BS1 and the first rotor 1A and the first gap GP1. The rotor base 11B has a second air passage 77B axially penetrating between the permanent magnet 12 and the shaft S. The second air passage 77B is in communication with the second gap GP2 and the third gap GP3. The rotor base 11 </ b> C has a third air passage 77 </ b> C axially penetrating between the permanent magnet 12 and the shaft S. The third air passage 77C is in communication with the fourth gap GP4 and the fifth gap GP5. The rotor base 11 </ b> D has a fourth ventilation path 77 </ b> D penetrating in the axial direction between the permanent magnet 12 and the shaft S. The fourth ventilation path 77D communicates with the sixth gap GP6 and the space between the second bottom surface BS2 and the fourth rotor 1D.

  The housing 10 airtightly encloses the first rotor 1A, the first stator 2A, the second rotor 1B, the second stator 2B, the third rotor 1C, the third stator 2C, and the fourth rotor 1D. There is. The first bottom surface BS is located on the opposite side to the first stator 2A side with respect to the first rotor 1A. The second bottom surface BS2 is located on the opposite side to the second stator 2A side with respect to the second rotor 1B. The intake port 14 of the first housing 10A is located on the first bottom surface BS1 and faces the first rotor 1A in the axial direction. The exhaust port 8 of the fourth housing 10D is located at the second bottom surface BS2 and axially faces the fourth rotor 1D.

  The first stator 2A is disposed between the first rotor 1A and the second rotor 1B. The second stator 2B is disposed between the second rotor 1B and the third rotor 1C. The third stator 2C is disposed between the third rotor 1C and the fourth rotor 1D. The first stator 2A, the second stator 2B, and the third stator 2C respectively include a first coil 91, a second coil 92, a first core 81, a second core 82, and a third core 83. And.

  The first stator 2A includes a first support plate 3A fixed to the first surface SF1 side of the first frame 20A shown in FIG. 1 and a second support plate 3B fixed to the second surface SF2 side of the frame 20A. And have. The second stator 2B includes a third support plate 3C fixed to the third surface SF3 side of the second frame 20B and a fourth support plate 3D fixed to the fourth surface SF4 side of the second frame 20B. Have. The third stator 2C includes a fifth support plate 3E fixed to the fifth surface SF5 side of the third frame 20C, and a sixth support plate 3F fixed to the sixth surface SF6 side of the third frame 20C. Have. The first to sixth support plates surround the shaft S in the circumferential direction of the shaft S.

  The first support plate 3A faces the first ventilation path 77A in the axial direction. The second support plate 3B is opposed to the second ventilation path 77B in the axial direction. The third support plate 3C faces the second ventilation path 77B in the axial direction. The fourth support plate 3D is opposed to the third ventilation path 77C in the axial direction. The fifth support plate 3E faces the third ventilation path 77C in the axial direction. The sixth support plate 3F faces the third ventilation path 77D in the axial direction. The first support plate 3A is opposed to the first rotor 1A via the first gap GP1. The second support plate 3B is opposed to the second rotor 1B via the second gap GP2. The third support plate 3C opposes the second rotor 1B via the third gap GP3. The fourth support plate 3D is opposed to the third rotor 1C via the fourth gap GP4. The fifth support plate 3E faces the third rotor 1C via the fifth gap GP5. The sixth support plate 3F faces the fourth rotor 1D via the sixth gap GP6.

  Here, the configuration will be described focusing on the first stator 2A. The second stator 2B and the third stator 2C have the same configuration as the first stator 2A.

  The first support plate 3A and the second support plate 3B are opposed in the axial direction. The first support plate 3A and the shaft S, and the second support plate 3B and the shaft S are separated. In order to prevent conduction between the first support plate 3A and the second support plate 3B in contact with the first coil 91 and the second coil 92, the first support plate 3A and the second support plate 3B are preferably formed of a nonmagnetic and nonconductive material. Further, the first support plate 3A and the second support plate 3B can be made of, for example, fiber reinforced plastic (FRP) in order to prevent deformation or to firmly support the members disposed therebetween. Further, the first support plate 3A and the second support plate 3B can be formed of a ceramic material.

  The first coil 91, the second coil 92, the first core 81, the second core 82, and the third core 83 are supported between the first support plate 3A and the second support plate 3B. The first coil 91 is wound around the shaft S. The second coil 92 is located on the inner peripheral side of the first coil 91 and is wound around the shaft S. As will be described later, the plurality of first cores 81 are arranged in the circumferential direction on the outer peripheral side of the first coil 91. The first core 81 faces the first coil 91 with a gap in the radial direction. The plurality of second cores 82 are arranged in the circumferential direction between the first coil 91 and the second coil 92. The second core 82 is opposed to the first coil 91 and the second coil 92 in the radial direction via a gap. The plurality of third cores 83 are arranged in the circumferential direction on the inner peripheral side of the second coil 92. The third core 83 faces the second coil 92 via a gap in the radial direction. That is, the relative positions of the third core 83, the second coil 92, the second core 82, the first coil 91, and the first core 81 are fixed by the first support plate 3A and the second support plate 3B. They are in order. The first core 81, the second core 82, and the third core 83 are exposed from the holes of the first support plate 3A and the second support plate 3B, and face the first rotor 1A and the second rotor 1B.

  Next, the action of the magnetic flux will be described focusing on the second stator 2B.

  When current flows through the first coil 91 and the second coil 92, magnetic flux is generated around the first coil 91 and the second coil 92. The magnetic flux passing through the first core 81, the second core 82, and the third core 83 is substantially parallel to the rotation axis AX. These magnetic fluxes act on the permanent magnets 12 of the second rotors 1B and 1C, and the second rotor 1B, the third rotor 1C, and the shaft S rotate. Similar magnetic flux is generated also in the first stator 2A and the third stator 2C. Three-phase alternating current is supplied to the first coil 91 and the second coil 92 of the first stator 2A, the second stator 2B, and the third stator 2C, respectively.

  FIG. 3 is a schematic cross-sectional view of the motor M. As shown in FIG. Here, only the first rotor 1A and the second rotor 1B, a part of the first stator 2A, and the shaft S are shown, and the illustration of the other elements is omitted. The configuration of the first stator 2A shown in FIG. 3 is similar to the configuration of the second stator 2B and the third stator 2C.

  The first support plate 3A includes a ventilation port 37 that communicates with the gap between the first coil 91 and the second core 82, and a ventilation port 38 that communicates with the gap between the second coil 92 and the second core 82. Have. The second support plate 3B includes a ventilation port 47 that communicates with the gap between the first coil 91 and the second core 82, and a ventilation port 48 that communicates with the gap between the second coil 92 and the second core 82. Have. The first stator 2 </ b> A has a ventilation path 9 </ b> A configured by a ventilation opening 37, a gap between the first coil 91 and the second core 82, and the ventilation opening 47. Further, the first stator 2 </ b> A has a ventilation path 9 </ b> B configured by a ventilation hole 38, a gap between the second coil 92 and the second core 82, and the ventilation hole 48.

  The flow of the air AR in the motor M when the blower connected to the flexible duct 6 operates will be described with reference to FIGS.

  By operating the blower, the inside of the motor M becomes negative pressure, and the air AR is drawn from the air inlet 14. The sucked air AR flows into the first gap GP1 through the outer circumferential side of the first rotor 1A or the first air passage 77A. Then, the air AR flows from the first gap GP1 to the second gap GP2 through the ventilation paths 9A and 9B in the first stator 2A. The air AR travels to both the outer peripheral side and the inner peripheral side in the second gap GP2, and the air AR advanced to the outer peripheral side of the second gap GP2 passes through the outer peripheral side of the second rotor 1B, and the second The air AR that has progressed to the inner peripheral side of the gap GP2 passes through the second air passage 77B and flows into the third gap GP3. Then, the air AR passes through the ventilation paths 9A and 9B in the second stator 2B and flows into the fourth gap GP4. The air AR travels to both the outer peripheral side and the inner peripheral side in the fourth gap GP4, and the air AR progressed to the outer peripheral side of the fourth gap GP4 passes through the outer peripheral side of the third rotor 1C, and the fourth The air AR that has progressed to the inner circumferential side of the gap GP4 passes through the third air passage 77C and flows into the fifth gap GP5. Then, the air AR passes through the ventilation paths 9A and 9B in the third stator 2C and flows into the sixth gap GP6. The air AR travels to both the outer peripheral side and the inner peripheral side in the sixth gap GP6, and the air AR advanced to the outer peripheral side of the sixth gap GP6 passes through the outer peripheral side of the fourth rotor 1D, and the sixth The air AR that has traveled to the inner peripheral side of the gap GP6 passes through the fourth ventilation path 77D and is discharged from the exhaust port 8. As described above, when the air AR flows inside the motor M, the first coil 91 and the second coil 92 can be cooled.

  As described above, the first to fourth rotor bases have the first to fourth ventilation paths, respectively, so that the air AR can also be sent to the inner peripheral side of the first to sixth gaps. During operation of the motor M, centrifugal force is generated by the rotation of the first to fourth rotors, so the air AR on the inner peripheral side of the first to sixth gaps tends to flow to the outer peripheral side. Therefore, the flow rate of the air AR in the first to sixth gaps can be increased by the first to fourth air passages.

  Further, since the first to sixth support plates face the first to fourth air passages, the traveling direction of the air AR passing through the first air passages should be directed in the radial direction of the first to sixth gaps. Can. Therefore, the air flow rate and the wind speed increase in the first to sixth gaps, and the cooling efficiency of the coil can be further improved. Note that only one of the first support plate 3A and the second support plate 3B may be configured to face the ventilation path 77A. The same applies to the second stator 2B and the third stator 2C.

  The first stator 2A had an air passage 9A passing between the first coil 91 and the second core 82, and an air passage 9B passing between the second coil 92 and the second core 82. May have a ventilation path that passes between the first coil 91 and the first core 81, and a ventilation path that passes between the second coil 92 and the third core 83, and these four ventilation paths. Or any two or more of them may be included.

  According to the present embodiment, the first support plate 3 </ b> A has ventilation openings 37 and 38, and the second support plate 3 </ b> B has ventilation openings 47 and 48. Therefore, the air passages 9A and 9B are formed in the first stator 2A, and the air AR can be directly applied to the first coil 91 and the second coil 92. The first support plate 3A and the second support plate 3B are formed using a nonmagnetic material with low thermal conductivity. That is, even when the first coil 91 and the second coil 92 are sandwiched between the first support plate 3A and the second support plate 3B having a low thermal conductivity, the cooling efficiency of the first coil 91 and the second coil 92 is improved. It is possible to improve. Similar effects can be obtained in the second stator 2B and the third stator 2C.

  4 is a schematic perspective view of the first rotor 1A shown in FIG.

  The rotor base 11A is disk-shaped. The first rotor 1A includes a plurality of cores 13 in addition to the above configuration. The core 13 is, for example, a dust core obtained by compressing and solidifying a ferromagnetic powder such as iron. The permanent magnet 12 and the core 13 have a long shape extending radially around the rotation axis AX, and are alternately arranged in the circumferential direction around the rotation axis AX. As shown in FIG. 2, in the first rotor 1A, the permanent magnet 12 and the core 13 are disposed only on one surface of the rotor base 11A facing the first stator 2A. In the 2nd rotor 1B and the 3rd rotor 1C, the permanent magnet 12 and the core 13 are arrange | positioned on both surfaces of the rotor bases 11B and 11C. In the fourth rotor 1D, the permanent magnet 12 and the core 13 are disposed only on one surface of the rotor base 11D facing the third stator 2C. Further, the rotor base 11A has a plurality of first ventilation paths 77A located at an appropriate interval on the inner peripheral side of the permanent magnet 12 and the core 13. Similarly, the second ventilation path 77B, the third ventilation path 77C, and the seventh ventilation path 77D are positioned at appropriate intervals on the inner peripheral side of the permanent magnet 12 and the core 13 in the rotor bases 11B, 11C, and 11D, respectively. doing.

  Next, details of the first stator 2A will be described with reference to FIGS. Since the second stator 2B and the third stator 2C have the same structure as the first stator 2A, the description thereof is omitted.

  FIG. 5 is a schematic perspective view of the first stator 2A shown in FIG.

  The first core 81 is exposed from the first opening 41 of the second support plate 3B. The second core 82 is exposed from the second opening 42 of the second support plate 3B. The third core 83 is exposed from the third opening 43 of the second support plate 3B. The ventilation port 47 of the second support plate 3B is intermittently positioned in the circumferential direction between the first opening 41 and the second opening 42. The ventilation port 48 of the second support plate 3 </ b> B is intermittently positioned in the circumferential direction between the second opening 42 and the third opening 43. While the first core 81, the second core 82, and the third core 83 are disposed in the first opening 41, the second opening 42, and the third opening 43, the vents 47 and 48 are hollow. Although not shown, the same applies to the first support plate 3A. The two lead portions 91a of the strands of the first coil 91 and the two lead portions 92a of the strands of the second coil 92 are drawn out of the first frame 20A, for example, through holes provided in the first frame 20A. The second support plate 3B has a slit 46 for extracting the wire of the second coil 92. The lead portion 92 a of the second coil 92 is accommodated in the slit 46. Further, positioning pins P for determining the positions of the members when assembling the respective members constituting the first stator 2A are exposed from the second support plate 3B.

  FIG. 6 is a schematic exploded perspective view of the first stator 2A. FIG. 6 shows members constituting the first stator 2A and the first frame 20A.

  The first stator 2A includes the first support plate 3A, the second support plate 3B, the plurality of first cores 81, the plurality of second cores 82, the plurality of third cores 83, the first coil 91, and the second coil. It has 92. Further, the first stator 2A includes first pressing members 5A and 5B, second pressing members 6A and 6B, and third pressing members 7A and 7B. These pressing members are preferably formed of a nonmagnetic and nonconductive material in order to prevent conduction with the first coil 91 and the second coil 92, and can be formed of, for example, various plastics.

  The plurality of first cores 81 are arranged along a first circumference C1 centered on the rotation axis AX. The plurality of second cores 82 are arranged along a second circumference C2 having a radius smaller than the first circumference C1 about the rotation axis AX. The plurality of third cores 83 are arranged along a third circumference C3 centered on the rotation axis AX and smaller than the second circumference C2. The arrangement | positioning space | interval in the circumferential direction of the 1st core 81 may be fixed, and may differ in at least one part. The same applies to the second core 82 and the third core 83. The first core 81, the second core 82, and the third core 83 are, for example, dust cores obtained by compressing and solidifying a ferromagnetic powder such as iron. When dust cores are used as the first core 81, the second core 82, and the third core 83, for example, the iron loss when the motor M is driven by alternating current in a high frequency region can be reduced.

  The first coil 91 and the second coil 92 are annular, and are arranged concentrically around the rotation axis AX. The radius of the second coil 92 is smaller than the radius of the first coil 91, and is disposed on the inner circumferential side of the first coil. The first coil 91 and the second coil 92 are configured by winding a strand in the circumferential direction around the rotation axis AX. In each of the first coil 91 and the second coil 92, for example, the wire is flat in the axial direction, and a plurality of stages are stacked in the axial direction and the radial direction.

  The first support plate 3 </ b> A has a circular shape centered on the rotation axis AX, a circular central opening 30 through which the shaft S passes, a plurality of first openings 31 corresponding to the first core 81, and a second core 82. And a plurality of third openings 33 corresponding to the third core 83. Further, the first support plate 3 </ b> A has a plurality of holes 34 provided along the outer peripheral edge and a plurality of holes 35 provided along the central opening 30. The vent hole 37 of the first support plate 3A is located closer to the second opening 32 than the first opening 31. The vent 38 of the first support plate 3A is located closer to the second opening 32 than the third opening 33.

  The second support plate 3B has substantially the same shape as the first support plate 3A, and includes the central opening 40, the plurality of first openings 41, the plurality of second openings 42, and the plurality of third openings 43. Have. Further, the second support plate 3 </ b> B includes a plurality of holes 44 provided along the outer peripheral edge, a plurality of holes 45 provided along the central opening 40, and a slit for drawing out the strands of the second coil 92. And 46. The vent hole 47 of the second support plate 3B is located closer to the second opening 42 than the first opening 41. The vent 38 of the second support plate 3B is located closer to the second opening 42 than the third opening 43.

  The first pressing member 5A has, for example, an annular shape whose outer diameter is equal to the outer diameter of the first support plate 3A. The first pressing member 5A has a plurality of notches 50 aligned at the same pitch as the plurality of first cores 81 on the inner circumferential side. The plurality of second pressing members 6A are annularly arranged at the same pitch as the plurality of second cores 82. The third pressing member 7 </ b> A has an annular shape whose inner diameter is equal to the diameter of the central opening 30, for example. The third pressing member 7A has a plurality of notches 70 aligned at the same pitch as the plurality of third cores 83 on the outer peripheral side. The shape and arrangement of the first presser member 5B, each second presser member 6B, and the third presser member 7B are the same as those of the first presser member 5A, each second presser member 6A, and the third presser member 7A. is there.

  The first frame 20A has a circular opening 21 having a diameter smaller than the outer diameters of the first support plate 3A and the second support plate 3B and larger than the outer diameters of the first pressing members 5A and 5B. Further, the first frame 20 </ b> A has an annular step portion 22 on the periphery of the opening 21. The step portion 22 is provided on both the first support plate 3A side and the second support plate 3B side. Furthermore, the frame 20A has a plurality of holes 23 provided in the step portion 22 and at least two positioning holes 24. The positioning pin P shown in FIG. 5 is passed through the positioning hole 24.

  FIG. 7 is a schematic plan view for explaining the positional relationship between the vent holes 47 and 48 of the second support plate 3B and the respective members of the first stator 2A. FIG. 7 corresponds to an enlarged plan view of a part of the first stator 2A shown in FIG. Here, the positions of the first coil 91 and the second coil 92 in the plane are indicated by broken lines.

  The first core 81, the second core 82, and the third core 83 are displaced from each other by, for example, an angle corresponding to 120 ° in electrical angle in the circumferential direction around the rotation axis AX. In the plane, the ventilation opening 47 is located between the first coil 91 and the second core 82. In the plane, the vent 48 is located between the second coil 92 and the second core 82. That is, the ventilation opening 47 is formed at a position connected to the gap between the first coil 91 and the second core 82. The ventilation port 48 is formed at a position connected to the gap between the second coil 92 and the second core 82.

  FIG. 8 is a schematic cross-sectional view of the first stator 2A taken along line F13 in FIG. FIG. 8 corresponds to a sectional view showing the first stator 2A shown in FIG. 2 in more detail.

  The first pressing members 5A and 5B are located between the first support plate 3A and the second support plate 3B, and axially face each other. The first pressing members 5A and 5B sandwich the stepped portion 22 of the first frame 20A in the axial direction. The first pressing member 5A is in contact with the first support plate 3A and the first frame 20A. The first pressing member 5B is in contact with the second support plate 3B and the first frame 20A. The third pressing members 7A and 7B are located between the first support plate 3A and the second support plate 3B, and axially face each other. The third pressing member 7A is in contact with the first support plate 3A. The third pressing member 7B is in contact with the second support plate 3B.

  The first support plate 3A contacts the first core 81 at the first opening 31, contacts the second core 82 at the second opening 32, and contacts the third core 83 at the third opening 33. The first support plate 3 </ b> A is in contact with the first coil 91 between the first opening 31 and the second opening 32, and is in contact with the second coil 92 between the second opening 32 and the third opening 33. . The second support plate 3B contacts the first core 81 at the first opening 41, contacts the second core 82 at the second opening 42, and contacts the third core 83 at the third opening 43. The second support plate 3 </ b> B is in contact with the first coil 91 between the first opening 41 and the second opening 42, and is in contact with the second coil 92 between the second opening 42 and the third opening 43. . The ventilation port 37 of the first support plate 3A, the gap between the first coil 91 and the second core 82, and the ventilation port 47 of the second support plate 3B are positioned on a straight line in the axial direction. The ventilation port 47 of the 2nd support plate 3B, the clearance gap between the 2nd coil 92 and the 2nd core 82, and the ventilation port 48 of the 2nd support plate 3B are located on the straight line of an axial direction.

  The first support plate 3A, the second support plate 3B, and the first pressing members 5A and 5B are fixed to the first frame 20A by the bolt B1 and the nut N1. Further, the first support plate 3A, the second support plate 3B, and the third pressing members 7A and 7B are fixed to each other by the bolt B2 and the nut N2. The bolt B1 passes through the hole 34 of the first support plate 3, the hole 52 of the first holding member 5A, the hole 23 of the first frame 20A, the hole 52 of the first holding member 5B, and the hole 44 of the second support plate 3B in this order. And screwed into the nut N1 on the side of the second support plate 3B. The bolt B2 is sequentially passed through the hole 35 of the first support plate 3, the hole 72 of the third presser member 7A, the hole 72 of the third presser member 7B, and the hole 45 of the second support plate 3B. Screw into the nut N2 on the side.

  FIG. 9 is a schematic cross-sectional view of the first stator 2A taken along line F14 in FIG.

  The second pressing members 6A and 6B are located between the first support plate 3A and the second support plate 3B, and axially face each other. The second pressing member 6A is in contact with the first support plate 3A. The second pressing member 6B is in contact with the second support plate 3B. The first presser members 5A and 5B are connected by inserting the screw S1 into each hole 51 of the first presser member 5B and screwing the tip into the female screw of each hole 51 of the first presser member 5A. The second pressing members 6A and 6B are connected by inserting the screw S2 into the hole 61 of the second pressing member 6B and screwing the tip thereof into the female screw of the hole 61 of the second pressing member 6A. Further, by inserting the screw S3 into each hole 71 of the third pressing member 7B and screwing the tip into the female screw of each hole 71 of the third pressing member 7A, the third pressing members 7A and 7B are connected. In the illustrated example, counterbore is provided in the hole 51 of the first presser member 5B, the hole 61 of the second presser member 6B, and the hole 71 of the third presser member 7B, and the heads of the screws S1 to S3 are provided in the counterbore. Is housed. Gaps are formed between the first pressing members 5A and 5B, between the second pressing members 6A and 6B, and between the third pressing members 7A and 7B, respectively. The first coil 91 is positioned between the first pressing member 5A and the second pressing member 6A and between the first pressing member 5B and the second pressing member 6B in the radial direction. The second coil 92 is located between the second pressing member 6A and the third pressing member 7A and between the second pressing member 6B and the third pressing member 7B in the radial direction.

  FIG. 10 is a perspective view schematically showing a first modification of the motor M according to the present embodiment. The configuration shown in FIG. 10 is mainly different from the configuration shown in FIG. 1 in the shape and position of the connecting member 90A.

  The housing 10 has an exhaust port (third hole) 8A and an exhaust port (fourth hole) 8B located at the side portion SD. The plurality of exhaust ports 8A are spaced apart from one another in the circumferential direction of the second housing 10B. The plurality of exhaust ports 8B are spaced from each other in the circumferential direction of the third housing 10C. The plurality of connecting members 90A are airtightly fixed to the outside of the second housing 10B and the third housing 10C, and are spaced apart from each other along the circumferential direction of the second housing 10B and the third housing 10C. The motor M includes, for example, four connecting members 90A arranged at equal intervals of about 90 ° in the circumferential direction. Each connecting member 90A has a connecting member exhaust port (fifth hole) 80A. One connecting member 90A communicates a pair of exhaust ports 8A and 8B. The fourth housing 10D has an air inlet (second hole) 14B at the second bottom surface BS2. In the illustrated example, four intake ports 14B are located at equal intervals in the circumferential direction.

  Although not shown, a flexible duct is connected to the connecting member exhaust port 80A of each connecting member 90A in the same manner as shown in FIG. The flexible ducts connected to the respective connecting members 90A are collected into one flexible duct and connected to the blower. The number of one set of exhaust ports 8A and 8B and connecting members 90A arranged in the circumferential direction of the motor M is not limited.

  FIG. 11 is a longitudinal sectional view of the motor M shown in FIG.

  The configuration shown in FIG. 11 is mainly different from the configuration shown in FIG. 2 in the configurations of the exhaust ports 8A and 8B, the intake port 14B, the connecting member 90A and the like. The air inlet 14A is located on the first bottom surface BS1 and faces the first rotor 1A in the axial direction. The exhaust port 8A is radially opposed to the second rotor 1B. The exhaust port 8B is radially opposed to the third rotor 1C. The intake port 14B axially faces the fourth rotor 1D. The exhaust ports 8A and 8B are communicated by the connecting member 90A. The flexible duct 6 is connected to the connecting member exhaust port 80A.

  The exhaust ports 8A and 8B have different opening areas. That is, the exhaust ports 8A and 8B have different pressure losses, and the amounts of air exhausted from the exhaust ports 8A and 8B to the connecting member 90A are different. Therefore, the air AR flows in the second stator 2B from the third gap GP3 to the direction of the fourth gap GP4, or from the fourth gap GP4 to the direction of the third gap GP3. Therefore, the second stator 2B can be ventilated. In addition, in order to make the pressure loss of the exhaust ports 8A and 8B different from each other, filters, punching metals or the like having different pressure losses may be installed at the exhaust ports 8A and 8B.

  The flow of the air AR in the motor M shown in FIG. 11 will be described.

  First, the air AR flows into the motor M from the intake ports 14A and 14B. The air AR that flows in from the intake port 14A passes through the first rotor 1A or the first ventilation path 77A, and then passes through the first gap GP1 through the ventilation paths 9A and 9B of the first stator 2A. It flows into the second gap GP2. The air AR in the second gap GP2 passes through the outer peripheral side of the second rotor 1B or the second ventilation path 77B. The air AR having flowed to the outer peripheral side of the second rotor 1B is discharged from the exhaust port 8A to the connecting member 90A or flows into the third gap GP3. Further, the air AR that has passed through the second ventilation path 77B also flows to the third gap GP3. The air AR in the third gap GP3 flows to the fourth gap GP4 through the ventilation paths 9A and 9B of the second stator 2B, and is discharged from the exhaust port 8B to the connecting member 90A.

  The air AR that has flowed in from the intake port 14B passes through the fourth rotor 1D or the fourth air passage 77D, and then passes through the air passages 9A and 9B of the third stator 2C from the sixth gap GP6. It flows into the fifth gap GP5. The air AR in the fifth gap GP5 is discharged from the exhaust port 8B to the connecting member 90A through the outer peripheral side of the third rotor 1C, or through the third ventilation path 77C and the fourth gap GP4.

  With such a configuration, the ventilation path between the intake ports 14A and 14B and the exhaust ports 8A and 8B is shorter than the ventilation path between the intake port 14 and the exhaust port 8 shown in FIG. It is possible to use a lower power blower. Therefore, downsizing and cost reduction of the blower can be achieved.

  FIG. 12 is a perspective view showing a configuration example of a connecting member 90B applied to the motor M shown in FIG.

  The connecting member 90 </ b> B surrounds the housing 10 in the circumferential direction and is fixed to the side portion SD of the housing 10. The plurality of exhaust ports 8A and 8B located at intervals in the circumferential direction of the housing 10 are communicated with each other by one connecting member 90B. The connecting member 90B has a connecting member exhaust port (sixth hole) 80B. By providing one connection member exhaust port 80B for one connection member 90B, the installation location of the flexible duct can be reduced, and the cost can be reduced.

  FIG. 13 is a perspective view schematically showing a second modification of the motor M according to the present embodiment. The configuration shown in FIG. 13 is mainly different from the configuration shown in FIG. 10 in the configuration of the connecting member 90C.

  The housing 10 has an exhaust port (seventh hole) 8C and an exhaust port (eighth hole) 8D located at the side portion SD, in addition to the exhaust ports 8A and 8B. The plurality of exhaust ports 8C are spaced apart from one another in the circumferential direction of the first housing 10A. The plurality of exhaust ports 8D are spaced apart from one another in the circumferential direction of the fourth housing 10D. The plurality of connecting members 90C are airtightly fixed to the outside of the first to fourth housings, and are spaced apart from each other in the circumferential direction of the first to fourth housings. Each connecting member 90C has a connecting member exhaust port (sixth hole) 80A. One connecting member 90C communicates with a set of exhaust ports 8A to 8D. The connecting member 90C shown in FIG. 13 is longer in the axial direction than the connecting member 90A shown in FIG. In addition, the number of one set of exhaust ports 8A to 8D and connecting members 90C arranged in the circumferential direction of the motor M is not limited.

  FIG. 14 is a longitudinal sectional view of the motor M shown in FIG.

  The configuration shown in FIG. 14 is mainly different from the configuration shown in FIG. 11 in the configuration of the exhaust ports 8C and 8D. The exhaust port 8C radially faces the first rotor 1A. The exhaust port 8D is radially opposed to the fourth rotor 1D. The exhaust ports 8A to 8D are connected by a connecting member 90C.

  The first housing 10A has a first partition portion 25A at a position facing the first rotor 1A in the radial direction. The first partition 25A extends to the first rotor 1A. The first partition 25A is located closer to the intake port 14A than the exhaust port 8C. The first partition portion 25A can suppress the air AR flowing in from the intake port 14A from flowing out from the exhaust port 8C through the outer peripheral side of the first rotor 1A. Further, the fourth housing 10D has a second partition portion 25B at a position facing the fourth rotor 1D in the radial direction. The second partition 25B extends to the fourth rotor 1D. The second partition 25B is located closer to the intake port 14B than the exhaust port 8D. The second partition portion 25B can suppress the air AR flowing in from the intake port 14B from flowing out from the exhaust port 8D through the outer peripheral side of the fourth rotor 1D. Therefore, the amount of air passing through the inside of the first stator 2A and the second stator 2C can be increased by the first partition 25A and the second partition 25B, and the cooling efficiency of the coil can be improved. it can.

  The exhaust ports 8A to 8D have different pressure losses. For example, the pressure loss at the exhaust port 8A is larger than the pressure loss at the exhaust port 8B. Moreover, the pressure loss of the exhaust port 8B is larger than the pressure loss of the exhaust port 8C. The pressure loss of the exhaust port 8C and the pressure loss of the exhaust port 8D are substantially equal. Therefore, the amount of air exhausted from each of the exhaust ports 8A to 8D to the connecting member 90C is different. Thus, the second stator 2B can be ventilated.

  The flow of the air AR in the motor M shown in FIG. 14 will be described.

  First, the air AR flows into the motor M from the intake ports 14A and 14B. The air AR which has flowed in from the intake port 14A flows into the first gap GP1 after passing through the first air passage 77A. The air AR in the first gap GP1 is discharged from the exhaust port 8C to the connecting member 90C, or flows through the ventilation paths 9A and 9B of the first stator 2A and flows into the second gap GP2. Then, the air AR in the second gap GP2 passes through the outer circumferential side of the second rotor 1B or the second air passage 77B. The air AR that has flowed to the outer peripheral side of the second rotor 1B is discharged from the exhaust port 8A to the connecting member 90C or flows into the third gap GP3. Further, the air AR that has passed through the second ventilation path 77B also flows to the third gap GP3. The air AR in the third gap GP3 flows to the third gap GP4 through the ventilation paths 9A and 9B of the second stator 2B, and is discharged from the exhaust port 8B to the connecting member 90C.

  The air AR that has flowed in from the intake port 14B flows into the sixth gap GP6 that has passed through the fourth air passage 77D. The air AR in the sixth gap GP6 is discharged from the exhaust port 8D to the connecting member 90C, or flows through the ventilation paths 9A and 9B of the third stator 2C and flows into the fifth gap GP5. The air AR in the fifth gap GP5 is discharged from the exhaust port 8B to the connecting member 90C through the outer peripheral side of the third rotor 1C, or through the third ventilation path 77C and the fourth gap GP4.

  With such a configuration, the ventilation path from the intake ports 14A and 14B to the exhaust ports 8A to 8D can be reduced, and a lower-power blower can be used. Therefore, downsizing and cost reduction of the blower can be achieved.

  FIG. 15 is a perspective view showing a configuration example of a connecting member 90D applied to the motor M shown in FIG. The configuration shown in FIG. 15 is different from the configuration shown in FIG. 12 in that the connecting member 90D is formed longer in the axial direction.

  The connecting member 90D surrounds the housing 10 and is fixed to the side SD of the housing 10. The plurality of exhaust ports 8A to 8D positioned at intervals in the circumferential direction of the housing 10 are communicated with each other by one connecting member 90D.

  FIG. 16 is a view showing an application example of the motor M according to the present embodiment.

  The motor M can be applied to, for example, a main motor of a railway vehicle 100 as shown in FIG. The railway vehicle 100 includes a vehicle body 110, a carriage 120 disposed below the vehicle body 110, a driving device 130, and a pantograph 140 disposed above the vehicle body 110. In the illustrated example, two carriages 120 are provided for the vehicle body 110, and two drive devices 130 are provided for each carriage 120. However, the present invention is not limited to this example.

  The carriage 120 includes a carriage frame 121, a plurality of wheels 122 attached to the carriage frame 121, and an air spring 123 disposed between the carriage frame 121 and the vehicle body 110. The drive device 130 includes a motor M as a main motor. Furthermore, the drive device 130 includes a control device that controls the motor M, a transmission mechanism that transmits the rotational force of the motor M to the wheel 122, and the like. The pantograph 140 is in contact with the overhead line 150. The electric power taken in from the overhead wire 150 via the pantograph 140 is supplied to the drive device 130, and the electric power rotates the motor M.

  In addition, the motor M which concerns on this embodiment is applicable not only to a rail vehicle but to the various apparatuses which require rotational power.

  FIG. 17 is a plan view schematically showing a third modification of the motor M according to this embodiment. The configuration shown in FIG. 17 differs from the configuration shown in FIG. 7 in the positions of the ventilation openings 47 and 48.

  In the plane, the second pressing member 6 </ b> B is located between the second cores 82. In the plane, the ventilation opening 47 is located between the second pressing member 6 </ b> B and the first coil 91. Further, the air vent 47 is not located between the second core 82 and the first coil 91. In the plane, the ventilation port 48 is located between the second pressing member 6 </ b> B and the second coil 92. Further, the air vent 48 is not located between the second core 82 and the second coil 92. Thus, the distance between the second core 82 and the first coil 91 can be reduced by not positioning the vent hole 47 between the second core 82 and the first coil 91. Similarly, by not positioning the air vent 48 between the second core 82 and the second coil 92, the distance between the second core 82 and the second coil 92 can be reduced. Therefore, the utilization efficiency of magnetic flux can be improved.

  FIG. 18 is a plan view schematically showing a fourth modification of the motor M according to this embodiment. The configuration shown in FIG. 18 differs from the configuration shown in FIG. 17 in the positions of the ventilation openings 47 and 48.

  The ventilation openings 47 and 48 are located between the second core 82 and the second pressing member 6B in the plane. That is, on the plane, the ventilation port 47, the second core 82, the ventilation port 48, and the second pressing member 6B are arranged in this order in the circumferential direction. The vent holes 47 and 48 are connected to the second opening 42 of the second support plate 2B.

  FIG. 19 is a schematic cross-sectional view of the first stator 2A taken along line F15 in FIG.

  The first support plate 3 </ b> A has ventilation openings 37 and 38 between the first support plate 3 </ b> A and the second core 82. The ventilation openings 37 and 38 are connected to the second opening 32 of the first support plate 3A. The vent 37 is opposed to the vent 47 in the axial direction. The vent 38 is opposed to the vent 48 in the axial direction. The second core 82 has a first collar portion 82A and a second collar portion 82B. The first flange portion 82A has a ventilation path 82C. That is, the first stator 2 </ b> A has a ventilation path 9 </ b> A configured by the ventilation opening 37, the ventilation path 82 </ b> C of the first flange portion 82 </ b> A, and the ventilation opening 47. The second flange portion 82B has a ventilation path 82D. That is, the first stator 2 </ b> A has a ventilation path 9 </ b> B configured by the ventilation hole 38, the ventilation path 82 </ b> D of the second collar portion 82 </ b> B, and the ventilation hole 48. The heat generated by the iron loss in the second core 82 can be radiated by the ventilation paths 9A and 9B.

  As described above, according to the present embodiment, it is possible to obtain a rotating electrical machine capable of improving the cooling efficiency of the coil.

  In the present embodiment, a motor M including four first to fourth rotors and three first to third stators has been disclosed. However, the motor M may include a larger number of stators and rotors or a smaller number of stators and rotors.

  Also, while certain embodiments of the invention have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

M: Motor, 14A, 14B ... Intake port, 8A, 8B, 8C, 8D ... Exhaust port,
10, 10A, 10B, 10C, 10D ... housing, S ... shaft,
1A, 1B, 1C, 1D ... rotor, 2A, 2B, 2C, 2D ... stator,
37, 38, 47, 48 ... vents, 3 ... first support plate, 4 ... second support plate,
91 ... 1st coil, 92 ... 2nd coil,
81 ... 1st core, 82 ... 2nd core, 83 ... 3rd core,
11 ... Rotor base, 12 ... Permanent magnet, 77A, 77B, 77C, 77D ... Ventilation path,
90 ... connecting member, 4A, 4B ... connecting member exhaust port,
25A ... 1st partition part, 25B ... 2nd partition part.

Claims (10)

A shaft,
A first coil wound around the shaft, a second coil wound around the shaft and positioned on the inner peripheral side of the first coil, and between the first coil and the second coil A core disposed through a gap, an opening that supports the first coil, the second coil, and the core, the core is located, and a vent hole that is a cavity at a position different from the opening. A first stator comprising a support plate having,
A first rotor having a first surface and a second surface located on the opposite side of the first surface and facing the first stator via a first gap; and fixed to the shaft;
A second rotor having a third surface facing the first stator via a second gap, and a fourth surface opposite to the third surface, the second rotor being fixed to the shaft;
A first bottom surface airtightly surrounding the first rotor, the second rotor, and the first stator, and located on the side opposite to the first stator with respect to the first rotor; A second bottom surface located opposite to the first stator side with respect to the second rotor, a side portion located between the first bottom surface and the second bottom surface, and the first bottom surface A rotating electrical machine comprising: a housing having a first hole positioned and a second hole positioned in the second bottom surface.   The electric rotating machine according to claim 1, wherein the first rotor has an air passage which penetrates in the axial direction and communicates with the first gap.   The rotating electrical machine according to claim 2, wherein the support plate surrounds the shaft in a circumferential direction of the shaft with a gap, and faces the ventilation path of the first rotor in the axial direction. A second stator facing the fourth surface of the second rotor via a third gap;
A third rotor fixed to the shaft, having a fifth surface facing the second stator via a fourth gap, and a sixth surface opposite to the fifth surface;
A third stator facing the sixth surface of the third rotor via a fifth gap;
A fourth rotor fixed to the shaft, having a seventh surface facing the third stator via a sixth gap, and an eighth surface opposite to the seventh surface;
A connection member hermetically fixed to the outside of the housing,
The housing is located at the side portion and has a third hole radially opposed to the second rotor, and a fourth hole located at the side portion opposite the third rotor and the radial direction. Have
The rotary electric machine according to any one of claims 1 to 3, wherein the third hole and the fourth hole are communicated with each other by the connection member. The plurality of third holes are spaced apart from each other in the circumferential direction of the housing,
The plurality of fourth holes are spaced from each other in the circumferential direction of the housing,
The plurality of connection members are fixed to each other at intervals in the circumferential direction of the housing, and each of the connection members has a fifth hole, and communicates the pair of third holes and the fourth hole. The rotating electrical machine according to claim 4. The plurality of third holes are spaced apart from each other in the circumferential direction of the housing,
The plurality of fourth holes are spaced from each other in the circumferential direction of the housing,
5. The rotating electrical machine according to claim 4, wherein the connecting member surrounds the housing in the circumferential direction, has one sixth hole, and communicates the plurality of third holes and the plurality of fourth holes. The housing is located on the side portion and has a seventh hole facing the first rotor in the radial direction; the housing is located on the side portion and facing the fourth rotor in the radial direction; A first partition extending to the first rotor at a position facing the first rotor in the radial direction; and extending to the fourth rotor at a position facing the fourth rotor in the radial direction. A second partition part
The first partition is located closer to the first hole than the seventh hole;
5. The rotating electrical machine according to claim 4, wherein the second partition portion is located closer to the second hole than the eighth hole.   The vent hole of the support plate is located between the first coil and the core and between the second coil and the core in the radial direction, and between the first coil and the core. The rotating electrical machine according to claim 1, wherein the rotating electrical machine communicates with a gap between the second coil and the core. Furthermore, the first stator includes a pressing member arranged in the circumferential direction of the core,
The ventilating hole of the support substrate is located between the first coil and the pressing member and between the second coil and the pressing member in the radial direction. The rotating electrical machine according to item 1. Furthermore, the first stator includes a pressing member arranged in the circumferential direction of the core,
The vent hole of the support substrate is connected to the opening, and is located between the core and the pressing member in the circumferential direction,
The rotating electrical machine according to any one of claims 1 to 7, wherein the core includes a flange portion that has a ventilation path communicating with the ventilation opening and protrudes in a circumferential direction.

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