Rotating electric machines

Abstract

To provide a technique for appropriately cooling a coil end.SOLUTION: A stator (20) includes an annular coil end (22) projecting from an end in a shaft direction, and a rotor (30) has a vent hole (33) through which a gas passes from one end in the shaft direction toward the other end. The coil end (22) has a flow path (221) through which the gas having passed through the vent hole (33) passes from an inner peripheral side to an outer peripheral side, and a cooling air control member (60) for rectifying the gas flowing out of the flow path (221) is provided between the coil end (22) on the other end side and a housing (40). The cooling air control member (60) includes a guide plate (63) extending along an outer periphery and an end surface in the shaft direction of the coil end (22) so as to rectify a flow of the gas in the shaft direction at the coil end (22).SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a rotating electric machine. [Background technology]

[0002] The coil ends of a rotating electrical machine generate heat when a current flows through them, and therefore require appropriate cooling.

[0003] Patent Document 1 discloses a cooling device for a rotating electrical machine that includes a ventilation guide that covers a portion of the coil end for cooling the coil end. The ventilation guide includes a shroud that covers the coil end and a partition member that divides the coil end into two ventilation paths on the inner periphery of the shroud, allowing the coil end to be cooled by centrifugal cooling air. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 58-89046 Summary of the Invention [Problem to be solved by the invention]

[0005] When a enclosure is provided to partially cover the coil ends, as in the prior art, there are parts of the coil ends that are not adequately exposed to the wind, which poses the problem of not being able to cool the coil ends properly.

[0006] The present invention has been made in view of the above problems, and has an object to provide a technique for appropriately cooling the coil ends. [Means for solving the problem]

[0007] According to one embodiment of the present invention, the present invention is applied to a rotating electric machine in which a rotor and a stator are housed in a housing and the stator coil is cooled using gas. The stator has annular coil ends protruding from an axial end. The rotor has ventilation holes through which gas passes from one axial end to the other. The coil ends have flow paths through which gas passing through the ventilation holes passes from the inner periphery to the outer periphery, and a cooling air flow control member is provided between the coil ends on the other end side and the housing to rectify the gas exiting the flow path. The cooling air flow control member has a guide plate extending along the outer periphery and axial end face of the coil ends so as to axially rectify the flow of gas in the coil ends. [Effects of the Invention]

[0008] According to the present invention, the gas coming out of the rotor ventilation holes passes through the flow path of the coil end, and then is straightened in the axial direction by guide plates extending along the outer periphery and axial end face of the coil end, allowing the gas to flow around the coil end and ensuring that the coil end is properly cooled. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a cross-sectional view of a motor according to an embodiment of the present invention. [Figure 2] FIG. 2 is an explanatory diagram of the vicinity of the second coil end. [Figure 3] FIG. 3 is a perspective view of the cooling airflow control member. [Figure 4] FIG. 4 is an explanatory diagram of the configuration of the cooling air rectifying member and the second coil end. [Figure 5] FIG. 5 is an explanatory diagram of the outer periphery of the rotor. [Figure 6] FIG. 6 is an explanatory diagram of the outlet. [Figure 7] FIG. 7 is an explanatory diagram of the cooling structure. [Figure 8] FIG. 8 is an explanatory diagram of another modified cooling structure. [Figure 9] FIG. 9 is an explanatory diagram of a cooling structure according to still another modified example. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0011] Fig. 1 is an axial cross-sectional view of a motor 10 as a rotating electric machine according to an embodiment of the present invention, Fig. 2 is a cross-sectional view of the vicinity of a second coil end 22.

[0012] The motor 10 is configured to include a stator 20 formed in a circular ring shape, a rotor 30 rotatably mounted inside the stator 20, a rotating shaft 31 fitted into the rotor 30, and a housing 40 that houses the stator 20 and the rotor 30.

[0013] Windings made of rectangular wire are inserted into slots formed in the stator 20, and a first coil end 21 and a second coil end 22 are formed at both axial ends of the stator 20. The first coil end 21 protrudes in the axial direction from one end of the stator 20. The second coil end 22 protrudes in the axial direction from the other end of the stator 20. When a current is passed through the windings of the stator 20, the rotor 30 rotates due to the interaction with the permanent magnets provided in the rotor 30.

[0014] The windings are made of a plurality of rectangular wires that are folded back so as to run from one end of the stator 20 to the other end and then return to the one end.

[0015] The first coil end 21 is formed by a rectangular wire that stands axially from one end of the stator 20, then bends circumferentially and extends axially toward the end. The end of the first coil end 21 has multiple joints that are joined together and protrude in the axial direction.

[0016] In the second coil end 22, the flat wire rises in the axial direction from the other end of the stator 20 and bends circumferentially. This section forms an intersection section 222 (see FIG. 2) where multiple flat wires intersect. The flat wire is folded back in the axial direction from the bent section toward the stator 20. At the base section of the second coil end 22 near the stator 20, a flow path 221 is formed by the gap between the rising flat wires. The flow path 221 is a flow path through which cooling air passes from the radial inside to the radial outside of the second coil end 22, and multiple flow paths 221 are formed along the circumferential direction.

[0017] The rotor 30 has ventilation holes 33 that penetrate in the axial direction from one end to the other end. A plurality of ventilation holes 33 are provided in the circumferential direction. As will be described later, the ventilation holes 33 serve as passages through which cooling air passes from the first housing chamber 41 to the second housing chamber 42. The rotor 30 is cooled by the cooling air that passes through the ventilation holes 33.

[0018] The housing 40 accommodates the stator 20, the rotor 30, and the rotary shaft 31. The rotary shaft 31 is rotatably supported by the housing 40 via a bearing 32.

[0019] The housing 40 supports the stator 20 on its inner periphery. A first accommodating chamber 41 is provided on one end side of the stator 20, and a second accommodating chamber 42 is provided on the other end side of the stator 20. The first accommodating chamber 41 accommodates the first coil end 21 protruding from one end side of the stator 20. The second accommodating chamber 42 accommodates the second coil end 22 protruding from the other end side of the stator 20.

[0020] An appropriate distance for insulation is ensured between the inner wall of the first accommodating chamber 41 and the first coil end 21, and between the inner wall of the second accommodating chamber 42 and the second coil end 22.

[0021] A fan 35 fixed to the rotary shaft 31 is provided at the other end of the rotor 30. The fan 35 has a plurality of blades, and rotates in conjunction with the rotation of the rotor 30, thereby drawing air through the ventilation holes 33 of the rotor 30 and generating a flow of air (cooling air) directed circumferentially outward from the other end of the rotor 30. In this way, the fan 35 generates a flow of cooling air inside the housing 40 from the first housing chamber 41 to the second housing chamber 42.

[0022] The fan 35 has multiple blades, and the axial width of the blades forms the air outlet for blowing cooling air. As shown in Figure 2, the axial width W1 of the air outlet of the fan 35 is formed to be approximately the same as the axial width W2 of the flow path 221 of the second coil end 22 that the fan 35 faces. With this configuration, the cooling air blown from the fan 35 passes from the inner periphery to the outer periphery of the second coil end 22 without being obstructed by the intersection portion 222 of the second coil end 22.

[0023] 1, the first storage chamber 41 is provided with an inlet 44 for introducing air from outside the housing 40. The second storage chamber is provided with an exhaust pipe 45 for exhausting air to outside the housing 40.

[0024] With this configuration, when the motor 10 is driven to rotate the fan 35, external air is drawn in through the inlet 44 and introduced into the first housing chamber 41 as cooling air, cooling the first coil ends 21. The cooling air passes through the ventilation holes 33 of the rotor 30 and is sent to the second housing chamber 42 via the fan 35. In the second housing chamber 42, the cooling air cools the second coil ends 22. The cooling air is then discharged through the exhaust pipe 45. In this way, the motor 10 is air-cooled by gas.

[0025] In this embodiment, the gas used for the cooling air is air introduced from the atmosphere, but this is not limited to this and other gases (e.g., carbon dioxide or sulfur hexafluoride) may also be used. Also, the cooling air introduced into the motor 10 may be cooled by a heat exchanger outside the motor 10.

[0026] Next, cooling of the second coil end 22 will be described.

[0027] The first coil end 21 and the second coil end 22 generate heat when a current flows through them, and therefore require appropriate cooling. The motor 10 of this embodiment is configured so that a fan 35 is provided at one end of the rotor 30, and the first coil end 21 and the second coil end 22 are cooled by the cooling air generated by the fan 35.

[0028] The fan 35 has a plurality of blades extending radially from the rotary shaft 31, and blows cooling air from the rotary shaft 31 toward the second coil end 22 located radially outward.

[0029] At this time, centrifugal force caused by the rotation of the rotor 30 causes the cooling air to flow in a swirling direction (circumferential direction) around the rotary shaft 31. However, when the cooling air becomes a swirling flow, the cooling air does not sufficiently reach the outermost periphery of the second coil ends 22, and instead flows toward the exhaust pipe 45, which may result in the second coil ends 22 not being sufficiently cooled.

[0030] Therefore, the motor 10 of this embodiment is provided with a cooling air control member 60 at the second coil end 22 to control the flow of cooling air and to appropriately cool the second coil end 22, as will be described below.

[0031] FIG. 3 shows a perspective view of the cooling airflow control member 60. As shown in FIG.

[0032] As described above with reference to FIG. 2, the cooling airflow control member 60 is interposed between the second coil end 22 and the inner wall of the second accommodating chamber 42 of the housing 40.

[0033] As shown in FIG. 3, the cooling airflow control member 60 includes a cylindrical portion 61, a substantially disk-shaped opposing portion 62 connected to the cylindrical portion 61, and a plurality of guide plates 63 formed on the opposing portion 62 in an upright manner.

[0034] The cylindrical portion 61 abuts against the inner periphery of the second coil end 22. The facing portion 62 is provided continuously from the cylindrical portion 61 along the inner wall of the second accommodating chamber 42, and is formed in a position facing the axial end face of the second coil end 22. The facing portion 62 abuts against the inner wall of the second accommodating chamber 42. The guide plate 63 is formed to extend upright from the facing portion 62 toward the second coil end 22, and rectifies the flow of gas in the second coil end 22 in the axial direction.

[0035] The cylindrical portion 61 has a contact portion 611 whose outer peripheral surface contacts the rectangular wire that constitutes the second coil end 22. The cylindrical portion 61 also has a flange portion 612 that protrudes from the inner peripheral surface toward the center of the rotation axis, on the axially outer side of the fan 35. The flange portion 612 closes the axially outer side of the fan 35 to prevent the cooling air from the fan 35 from leaking into the second housing chamber 42 outside the cooling air control member 60.

[0036] The cylindrical portion 61 extends at an incline radially outward as it moves from the abutting portion 611 toward the axially outer side (the inner wall of the second accommodating chamber 42), and is connected to the opposing portion 62 at a position where it reaches the inner wall of the second accommodating chamber 42. The cylindrical portion 61 is formed with a plurality of air guide holes 64 that are holes that extend along the axial direction and communicate between the inside and outside of the cylindrical portion 61. The air guide holes 64 are located axially outer than the flange portion 612 of the cylindrical portion 61.

[0037] The guide plates 63 are arranged upright at predetermined intervals in the circumferential direction on the opposing portion 62. The inner peripheral side of the guide plate 63 is formed into a shape that follows the outer periphery and axial end face of the second coil end 22, while the outer peripheral side of the guide plate 63 is formed into a shape that follows the shape of the inner wall of the second accommodating chamber 42. The end of the guide plate 63 on the stator 20 side extends to near the upright portion of the rectangular wire of the second coil end 22.

[0038] By interposing the cooling air control member 60 configured in this manner between the second coil end 22 and the inner wall of the second accommodating chamber 42, the cooling air sent radially outward from the fan 35 cools the second coil end 22 without circling circumferentially due to centrifugal force caused by the rotation of the rotor 30.

[0039] More specifically, as shown by the white arrows in FIG. 2, the cooling air sent from the fan 35 passes through the flow path 221 of the second coil end 22 and is sent to the radial outside of the second coil end 22.

[0040] In the cooling air control member 60, multiple guide plates 63 are arranged along the outer periphery of the second coil end 22, so that the cooling air does not swirl circumferentially, but instead flows axially along the outer periphery of the second coil end 22 while being rectified by the guide plates 63.

[0041] The cooling air then flows along the opposing portion 62 and the cylindrical portion 61, passes near the axially outer end face of the second coil end 22, and then flows radially inward, before being discharged to the outside of the cooling air control member 60 through the air guide hole 64 formed in the cylindrical portion 61 and sent to the space of the second accommodating chamber 42.

[0042] In this way, the cooling air sent from the fan 35 passes through the flow path 221 of the second coil end 22, and then flows axially and radially along the outer peripheral shape of the second coil end 22, thereby allowing the second coil end 22 to be properly cooled.

[0043] Next, the relationship between the cooling airflow control member 60 and the second coil end 22 will be described.

[0044] FIG. 4 is an explanatory diagram of the motor 10 of this embodiment, as viewed from the inner peripheral side of the second coil end 22. As shown in FIG.

[0045] As mentioned above, the gaps between the standing rectangular wires at the base of the second coil end 22 form flow paths 221 through which cooling air passes. As shown in Figure 4, multiple rectangular wires stand upright at the same radial position. The cooling air sent from the fan 35 passes through these flow paths 221, passes around the second coil end 22, and then passes through the air guide holes 64 in the cylindrical portion 61 of the cooling air control member 60.

[0046] In this embodiment, the total opening cross-sectional area, which is the sum of the cross-sectional areas (axial cross-sections) of the air guide holes 64, is made larger than the total opening cross-sectional area, which is the sum of the cross-sectional areas (axial cross-sections) of the flow paths 221 of the second coil end 22.

[0047] With this configuration, even when the cooling air control member 60 is provided on the second coil end 22, the flow rate of the cooling air sent from the fan 35 is not restricted, and the second coil end 22 can be appropriately cooled.

[0048] Furthermore, the contact portion 611 of the cooling air control member 60 contacts the rectangular wire that constitutes the layer closest to the stator 20, which is located at the innermost periphery of the intersection portion 222, among the rectangular wires that constitute the second coil end 22 (as seen by arrow A in FIG. 4). In the cylindrical portion 61, the air guide holes 64 are configured to open up to the tip of the rectangular wire that is closest to the stator 20 in the second coil end 22.

[0049] By configuring it in this manner, the cooling air flowing around the second coil end 22 can reach the flat wire on the inner periphery of the second coil end 22 that is closest to the stator, thereby thoroughly cooling the entire second coil end 22.

[0050] FIG. 5 is an explanatory diagram of the motor 10 of this embodiment, as viewed from the outer circumferential side of the second coil end 22. As shown in FIG.

[0051] The guide plate 63 of the cooling airflow control member 60 is preferably provided at a position on the outer periphery of the second coil end 22 that will appropriately guide the flow of cooling air.

[0052] 5, the guide plate 63 is provided at a position substantially identical to the position of the rectangular wire standing at the base of the second coil end 22 near the stator 20. More specifically, the cooling air control member 60 is configured so that one guide plate 63 is positioned for the two standing rectangular wires.

[0053] With this configuration, the axial flow of cooling air flows around the second coil ends without being obstructed by the guide plate 63, so that the second coil ends 22 can be cooled appropriately.

[0054] Next, the relationship between the exhaust pipe 45 and the second coil end 22 will be described.

[0055] FIG. 6 is an explanatory diagram of the motor 10 of this embodiment, as viewed from the axial outside of the second coil end 22.

[0056] The exhaust pipe 45 extends in the second accommodating chamber 42 in a tangential direction relative to the rotational direction of the rotor 30, with its inlet opening in the tangential direction and positioned more inward than the second coil end 22, i.e., more inward than the air guide hole 64 of the cooling air control member 60.

[0057] The cooling air coming out of the air guide holes 64 of the cooling air control member 60 becomes a swirling flow in the rotational direction of the rotor 30 due to the centrifugal force caused by the rotation of the rotor 30 (arrow B in FIG. 6). Therefore, by opening the exhaust pipe 45 in the direction of this swirling flow, i.e., in the tangential direction to the rotational direction of the rotor 30, the cooling air in the second accommodation chamber 42 can be smoothly exhausted to the outside of the housing 40.

[0058] As described above, the embodiment of the present invention also relates to the motor 10 as a rotating electric machine in which the rotor 30 and the stator 20 are housed in the housing 40 and the coils of the stator 20 are cooled using gas. The stator 20 has annular second coil ends 22 protruding from an axial end, the rotor 30 has ventilation holes 33 through which gas passes from one axial end to the other, and the second coil ends 22 have flow paths 221 through which the gas that has passed through the ventilation holes 33 passes from the inner periphery to the outer periphery. A cooling air control member 60 is provided between the second coil ends 22 and the housing 40 to rectify the flow of gas coming out of the flow path 221, and the cooling air control member 60 has a guide plate 63 on the outer periphery of the second coil ends 22 to rectify the flow of gas in the axial direction.

[0059] With this configuration, the gas coming out of the ventilation holes 33 of the rotor 30 passes through the flow path 221 of the second coil end 22, and is then straightened in the axial direction by the guide plate 63, allowing the cooling air to flow around the second coil end 22, thereby allowing the second coil end 22 to be properly cooled.

[0060] In addition, a fan 35 is provided at the other end of the rotor 30, which rotates together with the rotor 30 to blow the gas that has passed through the ventilation holes 33 toward the inside of the second coil ends 22. The fan 35 blows cooling air toward the inside of the second coil ends 22, so that the second coil ends 22 can be cooled.

[0061] Furthermore, since a plurality of guide plates 63 are provided at predetermined intervals in the circumferential direction, the cooling air is rectified by the guide plates 63, and the flow in the swirling direction can be more reliably suppressed.

[0062] Cooling air control member 60 also includes a cylindrical portion 61 that abuts against the inner circumferential side of second coil end 22, and an opposing portion 62 that extends from cylindrical portion 61 along the inner wall of housing 40 and faces second coil end 22. Guide plate 63 is formed to stand from opposing portion 62 toward second coil end 22. Cylindrical portion 61 has multiple air guide holes 64 that discharge gas that has been rectified by guide plate 63 to the outside of cooling air control member 60.

[0063] With this configuration, the cooling air control member 60 surrounds the periphery of the second coil end 22 and straightens the flow of cooling air around the second coil end 22, so that the entire second coil end 22 can be thoroughly cooled.

[0064] Furthermore, the inner circumferential surface of the cylindrical portion 61 has a flange portion 612 formed on the axial outer side of the fan 35, protruding toward the center of the rotation axis of the fan 35. The flange portion 612 is disposed close enough to the end of the fan 35 so as not to touch it, thereby preventing the cooling air from the fan 35 from leaking into the second housing chamber 42 outside the cooling air control member 60.

[0065] The coil is a rectangular wire, and the second coil end 22 is formed by folding back multiple rectangular wires. The air guide holes 64 are holes that extend in the axial direction and extend to the axial tip of the innermost rectangular wire in the second coil end 22.

[0066] With this configuration, the air guide holes 64 are open to the innermost rectangular wire, so that the rectangular wire that constitutes the second coil end 22 can be cooled evenly. Rotating electric motor.

[0067] The flow paths 221 of the second coil end 22 are passages formed by gaps between multiple rectangular wires. Multiple flow paths 221 are provided along the circumferential direction of the second coil end 22. As a result, cooling air flows through the flow paths 221, cooling the base portions of the second coil ends 22.

[0068] The fan 35 has an air outlet facing the flow path 221, and the axial width of the air outlet is approximately the same as the axial width of the flow path 221 of the second coil end 22. The cooling air emitted from the fan 35 can pass through the second coil end 22 without being obstructed by the intersection portion 222.

[0069] Furthermore, since the total opening cross-sectional area of ​​the air guide holes 64 is approximately the same as the total opening cross-sectional area of ​​the flow path of the second coil end 22, the cooling air introduced into the second coil end 22 by the fan 35 can pass around the second coil end 22 without being obstructed by the structure of the cooling air control member 60.

[0070] The housing 40 is also provided with an exhaust pipe 45 that exhausts the gas that has passed through the air guide holes 64 to the outside of the housing 40. The inlet of the exhaust pipe 45 opens in the tangential direction of the rotation direction of the rotor 30, and is located radially inward of the positions of the air guide holes of the cooling air flow control member 60.

[0071] With this configuration, the cooling air that comes out of the cooling air control member 60 and becomes a swirling flow due to the rotation of the rotor 30 flows toward the inlet of the exhaust pipe 45, so that the cooling air is smoothly exhausted to the outside of the motor 10.

[0072] Next, a modified example of the embodiment of the present invention will be described.

[0073] FIG. 7 is an explanatory diagram of a motor 10 according to a modified example of this embodiment.

[0074] The modified example shown in Fig. 7 shows a configuration in which a heat exchanger is used to cool the cooling air introduced into the motor 10. Note that the configuration of the motor 10 is the same as the configuration described above with reference to Fig. 1, and therefore a description thereof will be omitted.

[0075] A first pipe 71 is connected to the inlet 44 of the first storage chamber 41, and a second pipe 72 is connected to the discharge pipe 45 of the second storage chamber 42. A heat exchanger 80 is provided between the first pipe 71 and the second pipe 72.

[0076] As described above, when the motor 10 is driven, the fan 35 sends cooling air to the second coil ends 22, thereby cooling the second coil ends 22.

[0077] The cooling air is discharged to the outside of the housing 40 through the exhaust pipe 45 and the second piping 72, and is sent to the heat exchanger 80 via the second piping 72. The heat exchanger 80 performs heat exchange to lower the temperature of the cooling air gas.

[0078] The cooling air whose temperature has been reduced by the heat exchanger 80 is introduced again into the interior (first accommodating chamber 41) of the housing 40 of the motor 10 via the inlet 44. The cooling air flows through the first accommodating chamber 41 and cools the first coil ends 21. The cooling air is then directed by the action of the fan 35 through the ventilation holes 33 of the rotor 30 toward the second accommodating chamber 42, where it cools the second coil ends 22.

[0079] In this way, by providing the heat exchanger 80 that cools the gas and lowering the temperature of the cooling air, the temperature of the cooling air introduced into the motor 10 can be controlled.

[0080] FIG. 8 is an explanatory diagram of a motor 10 according to another modified example of this embodiment.

[0081] The modified example shown in Fig. 8 is similar to the modified example shown in Fig. 7, but differs in that a fan 36 is also provided at one end (the right side in the figure) of the rotor 30. Note that the other configurations are the same as those described above with reference to Fig. 7, and therefore a description thereof will be omitted.

[0082] 8, the rotor 30 is provided with a fan 36 at one end. The fan 36 rotates together with the rotor 30, thereby sending cooling air from the first housing chamber 41 through the ventilation holes 33 of the rotor 30 to the second housing chamber 42. In the second housing chamber 42, the fan 35 sends the cooling air to the second coil ends 22, thereby cooling the second coil ends 22.

[0083] With this configuration, the amount of cooling air can be increased compared to when one fan 35 is provided at the other end of the rotor 30 as in the configuration described above with reference to Figures 1 and 7.

[0084] FIG. 9 is an explanatory diagram of a motor 10 according to yet another modified example of the present embodiment.

[0085] The modified example shown in Fig. 9 is similar to the modified example shown in Fig. 8, but differs in that a fan 36 is provided only at one end of the rotor 30, and no fan is provided at the other end of the rotor 30. Note that the other configurations are the same as those described above in Fig. 7, and therefore a description thereof will be omitted.

[0086] As shown in FIG. 9, the other end of the rotor 30 is provided with an air guide plate 38 that redirects the cooling air sent by the fan 36 through the ventilation holes 33 of the rotor 30 so that it flows radially outward.

[0087] As a result, the fan 36 at one end of the rotor 30 rotates together with the rotor 30, sending cooling air from the first housing chamber 41 to the second housing chamber 42 through the ventilation holes 33 of the rotor 30. In the second housing chamber 42, the cooling air is sent to the second coil ends 22 by an air guide plate, thereby cooling the second coil ends 22.

[0088] In this way, the fan 36 is provided at only one end of the rotor 30, and the air guide plate 38, which is configured to change the direction of the cooling air, is provided at the other end of the rotor 30. This configuration also allows the second coil ends 22 to be cooled appropriately.

[0089] The above describes embodiments of the present invention and their modifications. However, the above embodiments and modifications merely illustrate some of the application examples of the present invention, and are not intended to limit the technical scope of the present invention to the specific configurations of the above embodiments.

[0090] The motor 10 of this embodiment is mounted on, for example, an electric vehicle and functions as an electric motor that drives the wheels. The motor 10 also functions as a generator that receives driving force from the rotation of the wheels and generates electricity (regenerates power). The motor 10 may also be used as a drive device for devices other than automobiles, such as various electrical appliances or industrial machines. [Explanation of symbols]

[0091] 10: motor, 20: stator, 22: second coil end, 30: rotor, 33: ventilation hole, 35: fan, 36: fan, 38: air guide plate, 40: housing, 41: first accommodating chamber, 42: second accommodating chamber, 44: inlet, 45: outlet, 60: cooling air control member, 61: cylindrical portion, 62: opposing portion, 63: guide plate, 64: air guide hole, 71: first pipe, 72: second pipe, 80: heat exchanger, 221: flow path, 222: intersection portion, 611: abutment portion, 612: flange portion

Claims

1. A rotating electric machine in which a rotor and a stator are housed in a housing and a coil of the stator is cooled using a gas, The stator includes annular coil ends protruding from an axial end thereof, the rotor has a ventilation hole through which gas passes from one end to the other end in the axial direction, the coil end has a flow path through which gas that has passed through the ventilation hole passes from the inner peripheral side to the outer peripheral side, a cooling air flow control member that rectifies the gas exiting the flow path is provided between the coil end on the other end side and the housing, the cooling airflow control member includes a guide plate extending along an outer periphery and an axial end face of the coil end so as to rectify the flow of gas in the coil end in the axial direction, a fan that rotates together with the rotor at the other end of the rotor to blow the gas that has passed through the ventilation holes toward the inside of the coil end; The cooling airflow control member is a cylindrical portion that abuts against an inner circumferential side of the coil end; a facing portion extending from the cylindrical portion along an inner wall of the housing and facing the coil end, The guide plate is formed to stand from the opposing portion toward the coil end, The cylindrical portion has a plurality of air guide holes that discharge the gas rectified by the guide plate to the outside of the cooling air flow control member. Rotating electric motor.

2. 2. The rotating electric machine according to claim 1, The guide plates are provided in plurality at predetermined intervals in the circumferential direction. Rotating electric motor.

3. 2. The rotating electric machine according to claim 1, an inner circumferential surface of the cylindrical portion having a flange portion formed on an outer side in the axial direction of the fan and protruding toward the center of the rotation axis of the fan; Rotating electric motor.

4. 2. The rotating electric machine according to claim 1, The coil is a rectangular wire, The coil end is formed by folding back a plurality of the flat wires, The air guide hole is a hole extending in the axial direction and extending to the axial tip of the rectangular wire located at the innermost side of the coil end. Rotating electric motor.

5. 5. The rotating electric machine according to claim 4, The flow path is a passage formed by gaps between the plurality of flat wires, and a plurality of the flow paths are provided along the circumferential direction of the coil end. Rotating electric motor.

6. 6. The rotating electric machine according to claim 5, The fan has an air outlet facing the flow path, The axial width of the air outlet is approximately the same as the axial width of the flow path of the coil end. Rotating electric motor.

7. 7. The rotating electric machine according to claim 5 or 6, The total opening cross-sectional area of ​​the air guide holes is at least larger than the total opening cross-sectional area of ​​the flow paths of the coil ends. Rotating electric motor.

8. 2. The rotating electric machine according to claim 1, The housing is provided with an exhaust pipe for exhausting the gas that has passed through the air guide hole to the outside of the housing, an inlet of the exhaust pipe opens in a tangential direction of the rotation direction of the rotor, and is disposed radially inward of the position of the air guide hole of the cooling air control member; Rotating electric motor.

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