WO2018047515A1

WO2018047515A1 - Dynamo-electric machine

Info

Publication number: WO2018047515A1
Application number: PCT/JP2017/027587
Authority: WO
Inventors: 龍一郎岩野; 公則澤畠
Original assignee: 株式会社日立製作所
Priority date: 2016-09-06
Filing date: 2017-07-31
Publication date: 2018-03-15
Also published as: JP2018042338A; JP6708526B2

Abstract

The present invention provides a dynamo-electric machine with which it is possible to strengthen the cooling of a stator coil end part without adversely affecting the cooling of a stator and a rotor. In order to solve this problem, this dynamo-electric machine is characterized in that: a stator coil, which is housed in a plurality of slots formed on the inside diameter side of a stator core, has stator coil end parts formed projecting in the axial direction from end parts of the stator core, and has guide plates installed on the stator coil end parts so as to cover the stator coil end parts; first openings for introducing a cooling medium from a cooler to the stator coil end parts are provided on a stator frame, which is located above the stator coil end parts; and at least one second opening for discharging the cooling medium that has cooled the stator coil end parts is provided to a region of the guide plates located on the axially outer side of axial flow fans.

Description

Rotating electric machine

The present invention relates to a rotating electrical machine.

Generally, a rotating electric machine such as an electric motor needs to cool a rotor and a stator, and a cooling structure for that purpose is provided.

As a typical cooling structure of such a rotating electric machine, there is a method of circulating the cooling medium inside the electric motor to cool the rotor and the stator.

In a relatively large-capacity rotating electrical machine using such a cooling method, a cooling medium flows into the gap (air gap) between the rotor and the stator from the outside in the axial direction to the inside. A structure in which a plurality of ventilation ducts having a predetermined interval in the axial direction and provided in the radial direction of the stator is circulated from the inner diameter side to the outer diameter side is known.

In addition, a part of the cooling medium flows into the axial flow path provided in the rotor, and, like the stator, has a predetermined interval in the axial direction and a plurality of ventilation ducts provided in the radial direction of the rotor. May be circulated from the inner diameter side to the outer diameter side and merged with the cooling medium flowing through the air gap. The cooling medium that has passed through the ventilation duct of the stator is guided to the cooler to remove heat, and then returned to the inside of the rotating electrical machine.

Furthermore, a structure in which a part of the cooling medium is divided to cool the end of the stator coil that protrudes in the axial direction from the end of the stator core (hereinafter referred to as the stator coil end) is generally used. The cooling medium that has cooled the stator coil end portion flows into the cooler as it is to remove heat. The cooling medium exiting the cooler is sent out again in the axial direction of the rotating electrical machine by axial fans installed at both ends of the rotating shaft.

In order to guide the cooling medium from the cooler to the axial fan, a guide plate is usually installed outside the stator coil end portion in the axial direction so as to cover the stator coil end portion. A ventilation duct is formed between the casing and the casing.

FIG. 7 shows the configuration of an example of such a rotating electric machine.

The rotating electrical machine shown in FIG. 7 is installed on a stator 2, a rotor 1 disposed on the inner diameter side of the stator 2 via an air gap 3, and a stator frame 8 positioned above the stator 2. A cooler 10 that removes heat from the cooling medium 18 that has cooled the stator 2 and the rotor 1, a casing 19 that houses the stator 2, the rotor 1, and the cooler 10, and the rotating shaft 11 of the rotor 1. An axial flow fan 7 is provided at both ends and returns the cooling medium 18 removed by the cooler 10 to the inside of the machine. The stator 2 is formed on the stator core 6 and the inner diameter side of the stator core 6. The stator coil 4 is housed in a plurality of slots (not shown), and the stator coil 4 has a stator coil end portion 9 protruding in the axial direction from the end portion of the stator core 6. So as to cover the stator coil end portion 9 And it is configured with a id plate 5.

Then, the cooling medium 18 removed by the axial fan 7 is divided into a cooling medium 18a going to the inside of the rotor 1, a cooling medium 18b going to the air gap 3, and a cooling medium 18c going to the stator coil end portion 9. . The cooling medium 18 a toward the inside of the rotor 1 cools the rotor 1, joins with the cooling medium 18 b toward the air gap 3, cools the stator 2, and flows into the stator frame 8. The cooling medium 18c toward the stator coil end portion 9 cools the stator coil end portion 9, and then flows into the stator frame 8 through the gap between the main plate 20 supporting the stator 1 and the stator frame 8. And merge with other cooling media. The cooling medium 18 that has flowed out of the outer periphery of the stator frame 8 flows into the cooler 10, is removed from the heat, passes through a ventilation path 21 formed by the casing 19 and the guide plate 5, and returns to the axial fan 7.

In the conventional cooling structure as described above, the cooling medium 18 sent out by the axial fan 7 is the cooling medium that cools the stator 2 and the rotor 1 (the cooling medium 18a toward the inside of the rotor 1 and the air gap 3). The cooling medium 18b) and the cooling medium 18c for cooling the stator coil end portion 9 (the cooling medium 18c toward the stator coil end portion 9) are divided.

For this reason, in order to enhance the cooling of the stator coil end portion 9, if the cooling medium flowing to the stator coil end portion 9 side (the cooling medium 18c toward the stator coil end portion 9) is increased, the stator 2 and The cooling medium flowing toward the rotor 1 (the cooling medium 18a toward the inside of the rotor 1 and the cooling medium 18b toward the air gap 3) decreases.

Conversely, when the cooling medium flowing toward the stator 2 and the rotor 1 (the cooling medium 18a toward the inside of the rotor 1 and the cooling medium 18b toward the air gap 3) is increased, the stator coil end 9 side is increased. The flowing cooling medium (cooling medium 18c toward the stator coil end portion 9) is reduced. That is, the cooling of the stator 2 and the rotor 1 and the cooling of the stator coil end portion 9 are in a trade-off relationship, and the stator coil end portion 9 does not adversely affect the cooling of the stator 2 and the rotor 1. There is a problem that it is difficult to strengthen the cooling of the water.

In order to solve this, Patent Document 1 discloses a structure in which the cooling medium immediately after coming out of the cooler is applied to fins installed on the outer side in the axial direction of the stator coil end portion.

Japanese Utility Model Publication No. 51-137501

In the conventional cooling technique described in Patent Document 1 described above, the axially outer end of the stator coil end portion is cooled by the total flow rate of the cooling medium flowing out of the cooler. Cooling can be enhanced.

However, the remaining portion on the inner side in the axial direction of the stator coil end portion is cooled by the cooling medium diverted from the fan as in the conventional case.

For this reason, increasing the flow rate of the axially inner portion of the stator coil end portion to enhance the cooling of the stator coil end portion in the axial direction reduces the amount of air flowing to the stator and the rotor. The problem remains unresolved.

The present invention has been made in view of the above points, and an object of the present invention is to provide a rotating electrical machine that can enhance cooling of a stator coil end without adversely affecting cooling of the stator and the rotor. It is to provide.

In order to achieve the above object, a rotating electrical machine according to the present invention includes a stator, a rotor disposed on an inner diameter side of the stator via an air gap, and a stator frame positioned above the stator. A cooler for removing heat from the cooling medium that has cooled the stator and the rotor, a casing for storing the stator, the rotor, and the cooler, and both ends of the rotating shaft of the rotor. And an axial fan that circulates the cooling medium removed by the cooler into the machine, and the stator is housed in a stator core and a plurality of slots formed on the inner diameter side of the stator core. The stator coil is formed with a stator coil end portion protruding in an axial direction from an end portion of the stator core, and so as to cover the stator coil end portion. Installed at the stator coil end A first opening for introducing a cooling medium from the cooler into the stator coil end portion in the stator frame located above the stator coil end portion. At least one second opening for discharging the cooling medium that has cooled the stator coil end portion is provided in a region of the guide plate that is positioned on the axially outer side of the axial fan. It is provided.

According to the present invention, it is possible to enhance the cooling of the stator coil end without adversely affecting the cooling of the stator and the rotor.

It is sectional drawing which shows the whole structure of Example 1 of the rotary electric machine of this invention. FIG. 2 is a cross-sectional view taken along line AA in FIG. It is sectional drawing which expands and shows the periphery of the stator coil end part which shows Example 2 of the rotary electric machine of this invention. It is sectional drawing which expands and shows the periphery of the stator coil end part which shows Example 3 of the rotary electric machine of this invention. It is sectional drawing which expands and shows the periphery of the stator coil end part which shows Example 4 of the rotary electric machine of this invention. It is sectional drawing which expands and shows the periphery of the stator coil end part which shows Example 5 of the rotary electric machine of this invention. It is sectional drawing which shows the whole structure of the conventional rotary electric machine.

Hereinafter, the rotating electrical machine of the present invention will be described based on the illustrated embodiments. In addition, the code | symbol uses the same code | symbol for the same thing as the past.

1 and 2 show a first embodiment of the rotating electrical machine of the present invention.

As shown in the figure, the rotating electrical machine of the present embodiment includes a stator 2, a rotor 1 disposed on the inner diameter side of the stator 2 via an air gap 3, and a position above the stator 2. A cooler 10 installed on the stator frame 8 that removes the cooling medium 18 that has cooled the stator 2 and the rotor 1, a casing 19 that houses the stator 2, the rotor 1, and the cooler 10, and a rotation An axial flow fan 7 is provided at both ends of the rotating shaft 11 of the child 1 and recirculates the cooling medium 18d removed by the cooler 10 into the machine. Further, the stator 2 includes a stator core 6 and The stator coil 4 includes a plurality of slots (not shown) formed on the inner diameter side of the stator core 6, and the stator coil 4 extends axially from the end of the stator core 6. The stator coil end portion 9 that protrudes from the The coil end portion 9 is covered with the guide plate 5A is schematically configured.

In the present embodiment, the first cooling medium 18 d for removing heat from the cooler 10 is introduced into the stator coil end 9 in the stator frame 8 positioned above the stator coil end 9. An opening 12 is provided, and the

cooling mediums

18e, 18f, and 18g for cooling the stator coil end portion 9 are discharged to a region located on the axially outer side of the axial flow fan 7 of the guide plate 5A.

Second openings

13a, 13b, and 13c are provided.

Specifically, the guide plate 5A is formed in an L shape including a radially extending portion 5A1 and an axially extending portion 5A2, and the distal end of the radially extending portion 5A1 is fixed to the stator frame 8. The tip of the portion 5A2 that extends in the axial direction is close to the end in the axial direction of the stator core 6, and the

second openings

13a, 13b, and 13c have the diameter of the L-shaped guide plate 5A. A second opening 13a in the axially extending portion 5A1, a second opening 13b in the axially extending portion 5A2, and a second opening at the boundary between the radially extending portion 5A1 and the axially extending portion 5A2. The portion 13c is opened, and a plurality of the

second openings

13a, 13b, and 13c are provided at predetermined intervals in the circumferential direction as shown in FIG.

Further, the first opening 12 is provided in the stator frame 8 located on the axial end portion side of the stator core 6 of the stator coil end portion 9.

In the rotating electric machine of this embodiment, as shown in FIG. 1, the cooling medium 18 d removed from the heat by the cooler 10 is fixed through the first opening 12 provided at the top of the stator frame 8. The child coil end portion 9 is cooled. The

cooling mediums

18e, 18f, and 18g that have cooled the stator coil end portion 9 are the cooling medium 18e from the second opening 13a, the cooling medium 18f from the second opening 13b, and the second opening 13c. The cooling medium 18g flows out to the suction side of the axial fan 7 respectively.

The cooling medium pumped by the axial fan 7 flows into the air gap 3 and the rotor 1 as shown in the cooling medium 18 a toward the inside of the rotor 1 and the cooling medium 18 b toward the air gap 3. Unlike the conventional example shown in FIG. 7, the guide plate 5 </ b> A is extended inward in the axial direction so that the cooling medium does not return from the discharge side of the axial flow fan 7 to the stator coil end portion 9, and the axial direction of the stator core 6. It is close to the end.

According to such a configuration of this embodiment, the entire stator coil end portion 9 can be directly cooled by the cooling medium 18d removed by the cooler 10 (total flow rate of the removed cooling medium 18d). The cooling of the stator coil end portion 9 can be enhanced. Further, since there is no need to divert the cooling medium for cooling the stator coil end portion 9 as in the prior art shown in FIG. 7, the cooling of the stator 2 and the rotor 1 is not adversely affected.

Furthermore, if the cooling of the stator coil end portion 9 is strengthened, the temperature of the stator coil 4 in the stator core 6 is also reduced by heat conduction, so that the cooling performance of the entire stator 2 is also improved.

In general, when the cooling medium passes through the axial fan 7, the temperature rises due to the loss of the axial fan 7. By adopting the configuration of this embodiment, the cooling medium is cooled before passing through the axial fan 7. Since the medium hits the stator coil end portion 9, the stator coil end portion 9 can be cooled with a cooling medium having a temperature lower than that of the conventional example shown in FIG.

Further, as a secondary effect, it is not necessary to consider the distribution of the cooling medium to the stator coil end portion 9, so that the design is simplified.

Therefore, according to the present embodiment, since the entire stator coil end portion 9 can be directly cooled by the cooling medium 18d removed by the cooler 10, the cooling of the stator coil end portion 9 can be enhanced. Further, since the cooling medium from the axial flow fan 7 directly cools the stator 2 and the rotor 1, it does not adversely affect the cooling of the stator 2 and the rotor 1.

In the present embodiment, the

second openings

13a, 13b, and 13c are arranged almost uniformly in the circumferential direction, but may be arranged non-uniformly. For example, the cooling medium 18d removed by the cooler 10 flows from the upper part above the center of the rotating shaft 11, so that the cooling medium 18d circulates in the circumferential direction from the upper part of the rotating shaft 11 below the center. Flow down to the bottom.

Therefore, reducing the opening area of the upper

second openings

13a, 13b, and 13c and increasing the opening area of the lower

second openings

13a, 13b, and 13c to the suction side of the axial fan 7 This is effective for uniforming the circumferential flow rate distribution. Thereby, there exists an effect which prevents the characteristic of the axial fan 7 from deteriorating.

In the present embodiment, the first opening 12 is provided in the stator frame 8 positioned at the axial end of the stator core 6 of the stator coil end 9, but the stator coil end 9 The position of the first opening 12 is not limited as long as it is a position where the cooling medium can flow into the guide plate 5 </ b> A covering the surface.

In the present embodiment, the

second openings

13a, 13b, and 13c are provided at three locations in the cross section passing through the rotating shaft 11, but any position as long as it flows out to the suction side of the axial fan 7 is provided. Well, the number and arrangement of the second openings are not limited.

FIG. 3 shows a second embodiment of the rotating electrical machine of the present invention.

As shown in the figure, in the rotating electrical machine of the present embodiment, the guide plate 5B is formed in an L shape including a portion 5B1 extending in the radial direction and a portion 5B2 extending in the axial direction, and a portion 5B1 extending in the radial direction. The front end of the portion 5B2 that extends in the axial direction is close to the axial end of the stator core 6, and the two

second openings

13d and 13e are The second opening 13d is opened in a portion 5B1 extending in the radial direction of the L-shaped guide plate 5B, and the second opening 13e is opened in a portion 5B2 extending in the axial direction, and the

second openings

13d, 13e. As a reinforcing member that extends in the radial direction and the axial direction on the guide plate 5B between the respective circumferential directions of the

second openings

13d and 13e. The L-shaped rib 14 It has been kicked.

The portion of the L-shaped rib 14 extending in the axial direction is arranged along the direction of the flow toward the axial fan 7.

By adopting such a configuration of the present embodiment, it is possible to obtain the same effect as that of the first embodiment, and of course, by providing the L-shaped rib 14 as a reinforcing member, the second opening portion 13d. , 13e can be prevented from decreasing in strength. Further, the L-shaped rib 14 has not only a reinforcing member but also an effect of rectifying the flow of the cooling medium toward the axial fan 7.

FIG. 4 shows a third embodiment of the rotating electrical machine of the present invention.

As shown in the figure, in the rotating electrical machine of the present embodiment, the guide plate 5C is formed in an L shape including a portion 5C1 extending in the radial direction and a portion 5C2 extending in the axial direction, and a portion 5C1 extending in the radial direction. The tip end of the portion 5C2 extending in the axial direction extends to the end in the axial direction of the stator core 6, and the two

second openings

13d and 13e are L A second opening 13d is opened in a radial portion 5C1 of the letter-shaped guide plate 5C, and a second opening 13e is opened in a portion 5C2 extending in the axial direction. Each of the

second openings

13d and 13e, respectively. Are formed at a predetermined interval in the circumferential direction, and at the end of the stator core 6 in the axial direction, the tip of the portion 5C2 extending in the axial direction of the guide plate 5C and the end of the stator core 6 in the axial direction The second guide plate 1 that closes the space A is provided.

The above-described second guide plate 15 is formed in an L shape including a radially extending portion 15a and an axially extending portion 15b that are fixed to the axial end of the stator core 6, and this L shape. The tip portion of the portion 15b extending in the axial direction of the second guide plate 15 and the tip portion of the portion 5C2 extending in the axial direction of the L-shaped guide plate 5C overlap.

By adopting such a configuration of the present embodiment, the same effects as those of the first embodiment can be obtained, and the axial length of the guide plate 5C can be shortened, so that the distance of the cantilever structure can be shortened. Structural strength can be improved.

FIG. 5 shows a fourth embodiment of the rotating electrical machine of the present invention.

As shown in the figure, the rotating electrical machine of the present embodiment is provided with an air gap closing member 16 that closes the axial end of the air gap 3 at the axial end of the stator core 6, and the guide plate 5D includes: A portion 5D2 that is formed in an L shape including a portion 5D1 extending in the radial direction and a portion 5D2 extending in the axial direction, and a tip portion of the portion 5D1 extending in the radial direction is fixed to the stator frame 8 and extends in the axial direction. The second opening 13a is close to the air gap closing member 16, and the

second opening

13a, 13b, 13c has a second opening 13a in a portion 5D1 extending in the radial direction of the L-shaped guide plate 5D. A second opening 13b is opened in the axially extending portion 5D2, and a second opening 13c is opened in a boundary portion between the radially extending portion 5D1 and the axially extending portion 5D2, and the

second opening

13a, 13b, 3c is, at predetermined intervals in the circumferential direction are provided in plural.

By adopting such a configuration of the present embodiment, it is possible to obtain the same effect as that of the first embodiment, and of course, when the fan action due to the centrifugal force of the ventilation duct of the rotor 1 is stronger than the axial flow fan 7. In addition, it is possible to prevent the cooling medium from flowing out from the air gap 3 in the axial direction. Moreover, since the fan action of the ventilation duct of the axial flow fan 7 and the rotor 1 works in series, the pressure of the fan action can be summed up and the amount of ventilation to the stator 2 can be increased.

FIG. 6 shows a fifth embodiment of the rotating electrical machine of the present invention.

As shown in the figure, in the rotating electrical machine of the present embodiment, the guide plate 5E is formed in an L shape including a portion 5E1 extending in the radial direction and a portion 5E2 extending in the axial direction, and a portion 5E1 extending in the radial direction. The distal end of the portion 5E2 extending in the axial direction is close to the axial end of the stator core 6, and the

second openings

13a, 13b, 13c are The second opening 13a extends in the portion 5E1 extending in the radial direction of the L-shaped guide plate 5E, and the second opening 13b extends in the axial direction from the portion 5E1 extending in the axial direction. A second opening 13c is opened at a boundary portion of the portion 5E2, and a plurality of the

second openings

13a, 13b, 13c are provided at predetermined intervals in the circumferential direction.

In this embodiment, the

second opening

13a, 13b, 13c is radially inward at the outlet of the second opening 13c provided in the portion 5E2 extending in the axial direction closest to the axial fan 7. An axial direction turning member 17 for turning the cooling medium flowing out in the axial direction is provided.

In general, in the conventional example shown in FIG. 7 and also in the first embodiment shown in FIG. 1, the cooling medium that flows radially inward in the ventilation path 21 formed by the

guide plates

5, 5 </ b> A and the casing 19. When the direction of the flow changes by 90 ° in the axial direction toward the axial flow fan 7, the flow may be separated at the corners, and the flow may be biased.

However, according to the configuration of the present embodiment, the same effect as that of the first embodiment can be obtained, and the second opening 13c provided in the portion 5E2 extending in the axial direction closest to the axial fan 7 can be obtained. Since the axial direction turning member 17 for turning the cooling medium flowing out inward in the radial direction in the axial direction is provided at the outlet, the flow of the surroundings is sucked by the jet flow generated in the axial direction from the axial direction turning member 17. Since the effect is generated, the separation of the flow is suppressed and the inflow to the axial fan 7 becomes uniform, and the effect of preventing the fan characteristics from deteriorating is obtained. Thereby, the fall of an air volume can be prevented and cooling performance can be maintained.

In addition, this invention is not limited to an above-described Example, Various modifications are included.
For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 1 ... Rotor, 2 ... Stator, 3 ... Air gap, 4 ...

Stator coil

5, 5A, 5B, 5C, 5D, 5E ... Guide plate, 5A1, 5B1, 5C1, 5D1, 5E1 ... Guide plate diameter 5A2, 5B2, 5C2, 5D2, 5E2 ... part extending in the axial direction of the guide plate, 6 ... stator core, 7 ... axial fan, 8 ... stator frame, 9 ... stator coil end part, DESCRIPTION OF SYMBOLS 10 ... Cooler, 11 ... Rotating shaft, 12 ... 1st opening part, 13a, 13b, 13c, 13d, 13e ... 2nd opening part, 14 ... Rib, 15 ... 2nd guide plate, 15a ... Guide plate A portion extending in the radial direction of the guide plate, 15b a portion extending in the radial direction of the guide plate, 16 an air gap closing member, 17 an axial direction turning member, 18 a cooling medium, 18a a cooling medium toward the inside of the rotor, 18b Toward the air gap Cooling medium, 18c ... cooling medium toward the stator coil end, 18d ... cooling medium removed by the cooler, 18e, 18f, 18g ... cooling medium that cooled the stator coil end, 19 ... casing, 20 ... Main plate, 21 ... ventilation path.

Claims

A stator, a rotor disposed on the inner diameter side of the stator via an air gap, and a cooling medium installed on a stator frame positioned above the stator and cooling the stator and the rotor A cooler that removes heat, a casing that houses the stator, the rotor, and the cooler, and a cooling medium that is installed at both ends of the rotating shaft of the rotor and that removes heat from the cooler. And an axial fan that
The stator includes a stator core and a stator coil housed in a plurality of slots formed on the inner diameter side of the stator core,
The stator coil is formed with a stator coil end portion protruding in an axial direction from an end portion of the stator core, and is installed on the stator coil end portion so as to cover the stator coil end portion. Having a guide plate provided;
A first opening for introducing a cooling medium from the cooler into the stator coil end portion is provided in the stator frame located above the stator coil end portion, and the guide plate The region located outside in the axial direction of the axial flow fan is provided with at least one second opening for discharging the cooling medium that has cooled the stator coil end. Rotating electric machine.
In the rotating electrical machine according to claim 1,
The rotating electrical machine according to claim 1, wherein the first opening is provided in the stator frame located on the axial end portion side of the stator core of the stator coil end portion.
In the rotating electrical machine according to claim 1 or 2,
The guide plate is formed in an L-shape including a radially extending portion and an axially extending portion, and a distal end portion of the radially extending portion is fixed to the stator frame and extends in the axial direction. The rotating electric machine is characterized in that a tip end portion of the stator is close to an axial end portion of the stator core.
In the rotating electrical machine according to claim 3,
The cooling medium flowing inward in the radial direction is diverted in the axial direction to the outlet of the second opening provided at the portion extending in the axial direction closest to the axial fan in the second opening. An electric rotating machine characterized by comprising an axial direction turning member.
In the rotating electrical machine according to claim 1 or 2,
An air gap closing member that closes the axial end of the air gap is provided at the axial end of the stator core, and the guide plate is an L-shape that includes a portion extending in the radial direction and a portion extending in the axial direction. The rotating electrical machine is characterized in that the distal end portion of the radially extending portion is fixed to the stator frame, and the distal end portion of the axially extending portion is close to the air gap closing member .
In the rotary electric machine according to claim 3 or 4,
The second opening is opened at a boundary portion between a radially extending portion and an axially extending portion of the L-shaped guide plate, and a radially extending portion and an axially extending portion. A plurality of second openings are provided at predetermined intervals in the circumferential direction.
In the rotating electrical machine according to claim 3,
A plurality of the second openings are formed at predetermined intervals in the circumferential direction in a portion extending in the radial direction and a portion extending in the axial direction of the L-shaped guide plate, and each of the plurality of second openings is provided. A rotating electric machine characterized in that an L-shaped reinforcing member extending in the radial direction and the axial direction is provided on the guide plate between the circumferential directions.
The rotating electrical machine according to claim 7,
The L-shaped reinforcing member includes a rib, and a portion of the rib extending in the axial direction is along a flow direction toward the axial fan.
In the rotating electrical machine according to claim 1 or 2,
The guide plate is formed in an L shape including a portion extending in the radial direction and a portion extending in the axial direction, and the tip of the portion extending in the axial direction of the guide plate is formed at the axial end portion of the stator core. A rotating electrical machine characterized in that a second guide plate is provided to close a gap between a portion and an axial end of the stator core.
The rotating electrical machine according to claim 9,
The second guide plate is formed in an L shape composed of a radially extending portion and an axially extending portion that are fixed to the axial end of the stator core, and the L-shaped second guide plate. A rotating electrical machine characterized in that a tip portion of a portion extending in the axial direction of the guide plate and a tip portion of a portion extending in the axial direction of the L-shaped guide plate overlap each other.
The rotating electrical machine according to any one of claims 7 to 10,
The second opening is opened in a radial extending portion and an axial extending portion of the L-shaped guide plate, and a plurality of the second opening portions are provided at predetermined intervals in the circumferential direction. A rotating electric machine characterized by
The rotating electrical machine according to claim 6 or 11,
The rotating electrical machine is characterized in that the opening area of the lower portion of the second opening is larger than the opening area of the upper portion when the upper side is the upper side and the lower side is the lower side around the rotating shaft. .