JP2017011839A - Rotary electric machine, train employing the same and rotary electric machine system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cool a stator coil by providing a liquid capable of cooling a rotary electric machine within the rotary electric machine, without complicating a flow passage of the liquid and without increasing the number of components.SOLUTION: The rotary electric machine comprises: a frame 11; and a rotor 1 and a stator 2 that are disposed inside of the frame 11, and a liquid 15 is encapsulated inside of the frame. The rotary electric machine further comprises: an end ring 5 that is provided near an end face of the rotor; and a conductive bar 4 that is provided while protruding from the end face of the end ring 5. In the conductive bar 4, a storage part 16 that is formed in such a manner that the liquid 15 can be stored partially is provided towards an inner peripheral side of the rotor 1. A hole 17 including an opening smaller than an opening of the storage part 16 is provided towards an outer peripheral side of the rotor 1 while communicating with the storage part 16.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rotating electric machine or a train, and more particularly to a liquid sealed in a casing of the rotating electric machine.

  By completely closing the motor, the reduction in reliability due to the influence of the surrounding environment (iron powder, dust, etc.) is suppressed, and maintenance is being promoted. In addition, reduction in material cost due to reduction in size and weight and improvement in fuel efficiency are required for vehicle motors (railways, construction machines, etc.). In order to satisfy these requirements, a fully closed motor is actively employed. Since the fully-closed motor blocks air from the outside, it is difficult to cool the heat generated by the motor, and the motor itself is larger than the open-type air-cooled motor. Further, most of the cooling systems for fully-closed motors cool the inside and outside of the motor with air. In order to reduce maintenance costs and reduce the size and weight of a motor for a fully-closed air-cooled motor, it is possible to introduce a cooling system using liquid refrigerant.

  Under such circumstances, various motor structures have been studied with respect to a motor in which a cooling system using a liquid refrigerant is introduced. For example, Patent Documents 1-3 are cited.

  In Patent Document 1, a mixed liquid in which a refrigerant and lubricating oil are mixed in an electric motor is used, and the mixed liquid is separated into lubricating oil and refrigerant by centrifugal force due to the rotor rotating. Since the refrigerant has a higher density, the refrigerant gathers on the outer diameter of the rotor, and the lubricating oil gathers on the inner diameter side of the rotor. By separating, the lubricating oil performance and the cooling performance are improved.

  In Patent Document 2, a recess member for storing the refrigerant is provided at the axial end portion of the rotor, and an outflow hole is provided so that the stator coil can be cooled from the storage portion. By providing the storage part of the coolant, the stator coil can be cooled while suppressing variations in the coolant.

  Patent Document 3 cools an electric motor by applying oil to a refrigerant that cools the electric motor. In this cooling mechanism, the cooling oil is sprinkled up by a turning action caused by the rotation of the rotor and is circulated through the side surface of the bracket inside the electric motor to the cooling oil reservoir.

JP 2013-126295 A JP 2012-217267 A JP 2011-062061 A

In Patent Document 1, in order to cool the rotor, a storage unit is provided in the rotor, and lubricating oil is stored therein to improve cooling and lubrication performance of the bearing. When the rotor is actively cooled, it is effective but insufficient to cool the stator at the same time. In particular, the coil end of the stator is likely to generate heat in a fully-closed rotating electrical machine without a cooling fan, and thus cooling is necessary.
In Patent Document 2, in order to level the temperature distribution of the stator coil, the rotor is provided with a storage unit for storing the refrigerant, and has an outflow hole for allowing the stored refrigerant to flow out. In this case, a member (blade) for storing the refrigerant is provided. Therefore, there is a disadvantage that the number of parts increases and mechanical loss due to the member itself increases.

  In Patent Document 3, a rotor is provided with a storage unit that can store a refrigerant, and the refrigerant flows out to the outermost stator through a stator on the inner side by centrifugal force to cool the refrigerant. In order for the refrigerant stored in the rotor to flow out, the flow path itself is complicated, so that there is a high possibility that the flow rate that flows out becomes resistance and decreases.

  Therefore, in the case of a rotating electrical machine including a liquid that can cool the rotating electrical machine inside the rotating electrical machine, it becomes a problem to cool the stator coil without increasing the number of parts without complicating the liquid flow path.

  In order to solve the above-described problems, a rotating electrical machine according to the present invention includes, for example, a frame, a rotor and a stator disposed inside the frame, and a liquid is sealed inside the frame. And further comprising an end ring provided near the end face of the rotor and a conductive bar provided so as to protrude from the end face rather than the end ring, and the conductive bar contains a part of the liquid. A storage portion formed so as to be storable is provided toward an inner peripheral side of the rotor, and a hole having an opening smaller than the opening of the storage portion communicates with the space to communicate with the rotor. It is provided toward the outer peripheral side. The train according to the present invention includes the rotating electrical machine, a water cooling jacket provided in the rotating electrical machine, a pump that supplies water to the water cooling jacket, a wheel that rotates in accordance with the rotation of the rotating shaft, and the wheel. And a carriage provided above.

  Moreover, the train according to the present invention is, for example, a train using the rotating electrical machine according to the present invention, and includes a wheel that rotates as the rotor rotates, and a carriage that is provided above the wheel. It is characterized by providing.

  Further, the rotating electrical machine system according to the present invention is, for example, a rotating electrical machine system using the rotating electrical machine according to the present invention described above, and rotates with rotation of a pump that supplies water to the water cooling jacket and the rotor. And a carriage provided above the wheels.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the rotary electric machine which implement | achieves a simple structure, a train using the same, and a rotary electric machine system.

It is a figure which shows the axial direction cross section of the rotary electric machine which concerns on Example 1 of this invention. It is a figure which shows the rotor structure of the rotary electric machine which concerns on Example 1 of this invention. It is a figure which shows the rotor structure of the rotary electric machine which concerns on Example 1 of this invention. It is a figure which shows the rotor structure of the rotary electric machine which concerns on Example 1 of this invention. It is a figure which shows the rotor structure of the rotary electric machine which concerns on Example 1 of this invention. It is a rotor structure of the rotary electric machine which concerns on Example 1 of this invention, and is a figure which shows a part of cross section applied by changing the diameter of a void | hole. It is a figure which shows the rotor structure of the rotary electric machine which concerns on Example 2 of this invention. It is a figure which shows the rotor structure of the rotary electric machine which concerns on Example 2 of this invention. It is a figure which shows the rotor structure of the rotary electric machine which concerns on Example 3 of this invention. It is a figure which shows the rotor structure of the rotary electric machine which concerns on Example 4 of this invention. It is a rotor structure of the rotary electric machine which concerns on Example 4 of this invention, Comprising: It is a figure which shows the aspect which plugs up the axial direction edge part of a void | hole with a volt | bolt. It is a figure which shows the rotor structure of the rotary electric machine which concerns on Example 5 of this invention. It is a figure which shows the rotor structure of the rotary electric machine which concerns on Example 6 of this invention. It is a figure which shows the axial direction cross section of the rotary electric machine which concerns on Example 7 of this invention. It is a figure which shows the axial direction cross section of the rotary electric machine which concerns on Example 8 of this invention. It is a schematic diagram which shows the train which concerns on Example 9 of this invention using the rotary electric machine which concerns on either of the Examples 1-8 of this invention. It is a figure which shows the axial direction cross section of the rotary electric machine which concerns on Example 10 of this invention. It is a rotary electric machine which concerns on Example 10 of this invention, and is a figure which shows the axial direction cross section of the aspect which forms a flow path separately as a water cooling apparatus, and fastens to the inside of a flame | frame. It is a block block diagram which shows the rotary electric machine system (drive system) based on Example 11 of this invention using the rotary electric machine which concerns on Example 10 of this invention. FIG. 20 is a block configuration diagram showing a modification of the rotating electrical machine system (drive system) of FIG. 19 according to Example 11 of the present invention, in which a liquid sealed in the rotating electrical machine is circulated by a liquid pump. FIG. 21 is a block configuration diagram showing a modification of the rotating electrical machine system (drive system) of FIG. 20 according to Example 11 of the present invention and a mode in which a liquid heat exchanger for heat exchange of liquid is provided.

  The details of the present invention will be described below with reference to the drawings. In each figure, the same part is given the same number. According to the present invention, it is possible to suppress the increase in the physique and reduce the manufacturing cost and the maintenance cost by efficiently cooling the rotating electric machine without forming a complicated liquid flow path.

  FIG. 1 is a cross-sectional view of a rotating electrical machine according to a first embodiment of the present invention. It is a rotating electrical machine mainly used for railway vehicles of several hundred kW class, and a driving power supply is supplied with a three-phase AC power supply, and the rotation speed rotates in the range of 0 to 6000 min-1. Such a rotational speed is merely an example, and the application destination of the rotating electrical machine according to the present invention is not limited to a railway vehicle.

  As shown in FIG. 1, the rotating electrical machine is roughly divided into a rotor 1, a stator 2, and a frame 11. A gap is provided between the rotor 1 and the stator 2 so that the rotor 1 can rotate with respect to the stator 2. In the rotor 1, a rotor core 3 is laminated with electromagnetic steel plates in the axial direction, and the laminated end is constrained to the rotor core 3 at the end in the axial direction and is electrically coupled to the copper bar 4. Ring 5 is arranged. A plurality of copper bars 4 are arranged on the outer peripheral portion of the rotor 1 and in the circumferential direction. A shaft 7 serving as a rotation shaft is fastened to the rotor core 3. The stator 2 has a structure in which a stator core 8 is laminated with electromagnetic steel plates in the axial direction, and a stator core clamp 9 for restraining the stator core 8 is fastened to an end in the axial direction. A coil is applied to the stator core 8 in the circumferential direction, and a coil end 10 is formed at the end in the axial direction. A housing that accommodates the rotor 1 and the stator 2 includes a frame 11 and a bearing bracket 12. The stator 2 is fixed to the frame 11. The bearing bracket 12 is fastened to the frame 11, and a rolling bearing 13 and a deep groove ball bearing 14 that support the shaft 7 are disposed. The liquid 15 that cools the inside of the rotating electrical machine is sealed to the extent that the liquid 15 is immersed in the copper bar 4 of the rotor 1. Thereby, the liquid 15 is swept up by the turning action of the rotor 1, and the side of the coil end 10 and the stator 2 where the liquid 15 is not accumulated is cooled.

Here, the copper bar 4 disposed in the rotor 1 is projected in the axial direction from the end ring 5 disposed at the axial end of the rotor core 3. FIG. 2 shows the internal structure of the tip of the copper bar 4 protruding. As shown in FIG. 2, the internal structure at the tip is provided with a storage portion 16 for storing the liquid 15 on the radially inner diameter side of the rotor 1. Furthermore, a hole 17 is provided on the radially outer diameter side of the rotor 1 so as to communicate with the storage unit 16 and allow the stored liquid 15 to flow out. As a result, when the copper bar 4 of the rotor 1 rotates and passes through the liquid 15 enclosed in the rotating electrical machine, the liquid 15 is stored in the storage unit 16. The copper bar 4 of the rotor 1 rotates in the air from the liquid 15. At this time, the liquid 15 stored in the storage unit 16 is brought closer to the radially outer diameter side of the rotor 1 of the storage unit 16 by centrifugal force. Therefore, by providing the storage portion 16 on the radially inner diameter side of the rotor 1, the stored liquid 15 can be held even when rotated in the air. The liquid 15 stored in the storage unit 16 when rotating in the air flows out of the hole 17 by centrifugal force and is applied to the coil end 10 in the air. The cooling effect is achieved by the liquid 15 flowing out from the storage part 16 of the copper bar 4 together with the craving effect by the turning action of the rotor 1 on the coil end 10 that is not immersed in the liquid 15 by a series of operations described above. It becomes possible to improve. In addition, in the case of an induction motor, since it is well known that a plurality of bar shapes using a conductive material are used for the rotor, the axial end portion of this bar is simply processed as in the present embodiment. Effect. That is, since the cooling effect can be improved without adding new parts in order to improve the cooling performance, the cost can be reduced. FIG. 3 shows the leakage flux at the axial end of the stator 2. As shown in FIG. 3, a leakage magnetic flux 18 flows from the coil end 10 into the air. Since the leakage magnetic flux 18 is generated by an alternating current, the magnetic flux itself is also alternated. Since the protruding copper bar 4 of the rotor 1 and the coil end 10 are close to each other, the leakage magnetic flux 18 also links with the protruding portion of the copper bar 4. When an alternating magnetic flux is linked to the conductive material, an eddy current is generated. As a result, the loss increases, the motor efficiency decreases, and the heat generation amount also increases. However, when the storage part 16 is provided at the tip of the copper bar 4 as in this embodiment, there is no conductive part interlinked with the leakage magnetic flux 18 (electromagnetically the same as air), so eddy current can be reduced. It becomes possible. This makes it possible to improve the cooling performance without reducing the efficiency of the electric motor. Furthermore, in terms of mechanical strength, the protruding copper bar 4 and the end ring 10 are connected not only electrically but also structurally. Therefore, the protruding copper bar 4 becomes a cantilever fixed beam with the end ring 10 supported. The protruding copper bar 4 is subjected to centrifugal force in the outer diameter direction of the rotor 1 to generate stress. In the structure according to the present embodiment, by providing the storage portion 16, the mass of the protruding copper bar 4 is reduced. That is, the centrifugal force is reduced by reducing the mass, and the stress generated in the copper bar 4 can also be reduced. FIG. 4 shows a cross-sectional view applied to all of the plurality of copper bars arranged on the rotor. As shown in FIG. 4, this is applied to all of the arranged copper bars 4. Thereby, the increase in eddy current and stress described above can be minimized and the cooling performance can be improved. FIG. 5 shows a cross-sectional view applied to a plurality of copper bars arranged on the rotor at regular intervals. As shown in FIG. 5, the storage portions 16 and the holes 17 are alternately arranged. It is not always necessary to arrange them all, and it is only necessary to provide the storage portions 16 and the holes 17 in the number required for cooling. Thereby, the processing cost for improving the cooling performance can be minimized. FIG. 6 shows a cross-sectional view applied by changing the hole diameter. As shown in FIG. 6, the holes 17 are arranged with different diameters. When the volume of the storage unit 16 is the same, the amount of the liquid 15 accumulated in the storage unit 16 can be changed by changing the diameter of the holes 17. Thereby, in the circumferential cooling, it is possible to cool to the coil end 10 in the air immediately before the rotor 1 rotates and is again immersed in the liquid 15 enclosed in the rotating electrical machine. In FIG. 6, the amount of flow is controlled by changing the diameter of the holes 17, but if the diameter of the holes 17 is the same, the same effect can be obtained by changing the volume of the storage section 16. be able to.

  As described above, in the present embodiment, the cooling performance can be controlled by changing the dimensions of the storage section 16, the holes 17, and the number of the copper bars 4 to be applied, which is advantageous in terms of loss and mechanical strength. It becomes possible to do. In this embodiment, the bearing type is the rolling bearing 13 on the direct connection side and the deep groove ball bearing 14 on the anti-direct connection side. However, the same effect as described above can be obtained. In this embodiment, the bar material is copper, but the same effect can be obtained if it is a conductive material.

  FIG. 7 shows a second embodiment of the present invention in which holes for allowing the liquid to flow out are formed obliquely at the tip of the copper bar. As shown in FIG. 7, a hole 17 is provided in the oblique direction of the end of the copper bar 4 in the axial direction of the liquid 15 stored in the storage unit 16. By doing so, it is possible to actively cool the tip of the coil end 10 as shown in FIG. By arbitrarily changing the positions of the holes 17, it is possible to efficiently cool the local portion of the coil end 10 where the temperature is highest.

  FIG. 9 shows a third embodiment in which a plurality of holes for allowing liquid to flow out are provided at the tip of the copper bar. As shown in FIG. 9, two holes 17 are provided. This makes it easier to maintain the cooling performance of the liquid 15 stored in the storage unit 16. If the rotating electrical machine is operated for a long period of time, dust or the like is expected to accumulate in the liquid 15 sealed in the rotating electrical machine. Due to this dust, the air holes 17 are blocked and the cooling performance does not function. By providing a plurality of holes 17 as in this embodiment, if all the holes 17 are not blocked, the cooling effect is reduced, but the cooling performance can be maintained. In other words, redundancy for cooling performance is increased.

  FIG. 10 shows a fourth embodiment in which a storage part at the tip of a copper bar is provided inside the copper bar. As shown in FIG. 10, the storage portion 16 is provided inside the copper bar, and the holes 17c formed when processing are press-fitted with an iron ball 19 to be closed. By adopting such a structure, the processing for forming the storage section 16 becomes simple. Specifically, it can be formed only with a drill hole (ordinary drill), and the processing cost can be reduced. In addition, as shown in FIG. 11, the end of the hole 17c in the axial direction may be closed with a bolt 20. Closing with the bolt 20 makes it easy to remove the bolt 20 and clean the storage portion 16. That is, maintainability is improved.

  FIG. 12 shows a fifth embodiment in which grooves are provided on the outer periphery of the protruded copper bar. As shown in FIG. 12, a groove 21 is provided on the outer periphery of the projected copper bar 4 to increase the surface area. By carrying out like this, the thermal radiation performance of a copper bar can be made high. In addition, since the conductive member itself is reduced by providing the groove 21, as shown in Example 1, it is possible to reduce the eddy current loss on the electromagnetic side and the stress on the strength side. Become. Further, the amount of the liquid 15 sealed in the rotating electrical machine can be increased by the swiveling action of the rotor 1. Further, since the air in the rotating electrical machine can be easily moved by the groove 21 even in the air, the fan effect of the protruded copper bar 4 can be enhanced.

  FIG. 13 shows a sixth embodiment of the copper bar projecting in a round shape. As shown in FIG. 13, by making the protruding portion of the copper bar 4 into a round shape, it is possible to reduce fluid friction loss caused by rotational contact with the air 15 and the liquid 15 enclosed in the rotating electrical machine.

  FIG. 14 shows a bearing lubrication structure according to the seventh embodiment. As shown in FIG. 14, the liquid transmission member 22 is a rotor 1 of a copper bar 4 that is substantially L-shaped in the axial direction and substantially cylindrical in the circumferential direction near both bearings inside the motor. It arrange | positions at the radial direction inner diameter side. When the liquid 15 stored in the storage unit 16 falls from the storage unit 16 in the air (a sudden change in the rotational speed, etc.), it drops onto the liquid transmission member 22. As shown in the figure, since the liquid transmission member 22 has an oblique shape with respect to the ground, the dropped liquid 15 is collected in the vicinity of the rolling bearing 13 and the deep groove ball bearing 14. The accumulated liquid 15 is supplied to the rolling bearing 13 and the deep groove ball bearing 14 through a hole 23 communicating with the rolling bearing 13 and the deep groove ball bearing 14. In this way, if the liquid 15 is a liquid that also has a lubricating performance, the bearing can be lubricated. In addition, since there is no hole 23 and the liquid 15 is accumulated in the vicinity of the bearing even with only the liquid transmission member 22, it can also serve as a cooling effect for the bearing. Since the liquid transmission member 22 is close to the copper bar 4, it is preferable to use a non-conductive material.

  FIG. 15 shows the eighth embodiment, in which cooling fins are provided on the frame and the bearing bracket. As shown in FIG. 15, cooling fins 24 are provided on the outer periphery of the frame 11 and the bearing bracket 12. By providing the cooling fins 24, the cooling performance of the rotating electrical machine and the cooling performance of the liquid 15 can be improved. Particularly in a rotating electrical machine for a railway vehicle, the cooling fins 24 are effective in improving the cooling performance because the traveling wind is actively used as a refrigerant. Further, the cooling fins 24 may be provided only on the surface with which the liquid 15 is in contact. As a result, the heat exchange efficiency of the liquid 15 can be improved, and as a result, the internal cooling performance is improved. If the number of cooling fins 24 is determined in consideration of the temperature of the rotating electrical machine and the portion to be cooled, the cooling performance can be improved without increasing the mass of the rotating electrical machine more than necessary.

  FIG. 16 shows an example in which the rotating electrical machines of Examples 1 to 8 are applied to a train. The train 100 is connected to the carriage 102 disposed above the wheels via the rotating shaft and the gear 104 according to the rotation of the rotating electric machine 103, the gear 104, and the rotating electric machine 103 shown in the first to eighth embodiments. A rotating wheel 101 is provided, and a rotating electric machine 103 drives the wheel 101 via a gear 104. This configuration is effective for a cooling system by air cooling in which the liquid 15 is sealed inside the rotating electrical machine and the cooling fins 24 are provided on the outer periphery of the rotating electrical machine as in the eighth embodiment. Although there are two rotating electric machines 103 in the figure, it is possible to mount and drive one or more than two rotating electric machines.

  FIG. 17 is a view showing a tenth embodiment in which a water cooling device is provided on the outer periphery of the frame. As shown in FIG. 17, a water cooling jacket 25 is provided on the outer periphery of the frame 11. Between the frame 11 and the water cooling jacket 25, a flow path (water cooling flow path in the case of water cooling) 26 through which the cooling liquid flows is formed. By providing the water cooling jacket 25, the cooling performance of the rotating electrical machine and the cooling performance of the liquid 15 can be improved. This is particularly effective when the rotating electrical machine itself is covered by the entire system and heat exchange using external air cannot be expected. As in the eighth embodiment, the heat exchange efficiency of the liquid 15 can be improved, and as a result, the internal cooling performance is improved. The flow path 26 may be formed in a spiral shape toward the axial direction in the radial direction, or may be formed along the circumferential direction while flowing the liquid 15 in the axial direction and turning at the end in the axial direction. No problem. Further, as in the present embodiment, it is possible to prevent the efficiency of the cooling performance from being lowered if the flow path 26 itself is formed directly on the frame 11. However, as shown in FIG. 18, a flow path 26 may be separately formed as the water cooling device 27 and fastened inside the frame 11 or the like. With such a configuration, the assembly performance can be improved.

  19 to 21 show an example in which the rotating electrical machine is applied to the entire drive system, which is an eleventh embodiment. In FIG. 19, there is a power source 105 for driving the rotating electrical machine 103, and a three-phase AC voltage 107 is supplied from the power source 105 to the rotating electrical machine 103. The rotating electrical machine 103 is the rotating electrical machine equipped with the water cooling jacket 25 shown in the tenth embodiment, and the cooling water 108 serving as the refrigerant is fed by the pump 106. The power supply 105 is also provided with a water cooling function. The cooling water whose temperature has been increased by cooling the rotating electrical machine 103 and the power supply 105 is lowered in the heat exchanger 112 by the heat exchanger 112 and is supplied to the rotating electrical machine 103 and the power supply 105 again. Thus, it becomes possible to apply a cooling water to the whole system with respect to the apparatus provided with the water cooling function. Further, in FIG. 20, the liquid 15 sealed in the rotating electrical machine 103 can be circulated by the liquid pump 109 with respect to the configuration of FIG. As shown in the liquid flow 110 of FIG. 20, the temperature of the stator 2 can be further reduced by flowing the liquid over the rotating electrical machine 103. Further, in FIG. 21, the cooling performance of the rotating electrical machine 103 can be improved by providing a liquid heat exchanger 111 for heat exchange of the liquid 15 with respect to the configuration of FIG. In addition, the arrow shown in FIGS. 19-21 has shown the direction through which the cooling water 108 and the liquid 15 flow.

1 rotor
2 Stator
3 Rotor core
4 Copper bar
5 End ring
7 Shaft
8 Stator core
9 Stator core clamp
10 Coil end
11 frames
12 Bearing bracket
13 Rolling bearing
14 Deep groove ball bearings
15 liquid
16 Storage
17, 17a, 17b, 17c
18 Leakage magnetic flux
19 Iron ball
20 volts
21 groove
22 Liquid transmission member
23 holes
24 Cooling fin
25 Water cooling jacket
26 Flow path
27 Water cooling device
100 trains
101 wheels
102 trolley
103 Rotating electric machine
104 Gear
105 Power supply
106 pump
107 Three-phase AC voltage
108 Cooling water
109 Liquid pump
110 Liquid flow
111 Heat exchanger for liquid
112 heat exchanger

Claims (11)

A rotating electrical machine comprising a frame, and a rotor and a stator disposed inside the frame, wherein a liquid is sealed inside the frame,
An end ring provided near the end face of the rotor;
A conductive bar provided so as to protrude from the end face rather than the end ring;
The conductive bar is provided with a storage part formed so as to be able to store a part of the liquid toward the inner peripheral side of the rotor, and has an opening smaller than the opening of the storage part. A rotating electrical machine characterized in that a hole is provided in communication with the storage portion and toward an outer peripheral side of the rotor. A rotating electrical machine comprising a frame, and a rotor and a stator disposed inside the frame, wherein a liquid is sealed inside the frame,
An end ring provided near the end face of the rotor;
A conductive bar provided so as to protrude from the end face rather than the end ring;
The conductive bar is provided with a storage part formed so as to be able to store a part of the liquid toward the inner peripheral side of the rotor, and has an opening smaller than the opening of the storage part. A rotating electric machine characterized in that a hole communicates with the storage portion and is provided toward an outer peripheral side of the rotor at a corner portion of an axial end surface of the conductive bar. A rotating electrical machine comprising a frame, and a rotor and a stator disposed inside the frame, wherein a liquid is sealed inside the frame,
An end ring provided near the end face of the rotor;
A conductive bar provided so as to protrude from the end face rather than the end ring;
The conductive bar is provided with a storage part formed so as to be able to store a part of the liquid toward the inner peripheral side of the rotor, and has an opening smaller than the opening of the storage part. Two or more holes are provided in communication with the storage section toward the outer peripheral side of the rotor. A rotary electric machine comprising a frame, a rotor and a stator disposed inside the frame, and a liquid sealed inside the frame, an end ring provided near an end surface of the rotor; A conductive bar provided so as to protrude from the end face rather than the end ring, and a storage portion formed so as to be able to store a part of the liquid is provided inside the conductive bar, and an inner periphery of the rotor A hole having an opening communicating with the storage part is provided on the side, and a hole having an opening smaller than the hole part is provided toward the outer peripheral side of the rotor in communication with the storage part. Rotating electric machine characterized by that. In the rotating electrical machine according to any one of claims 1 to 4,
A rotating electrical machine, wherein a groove is provided on a surface of the conductor bar protruding from the end ring. In the rotary electric machine according to any one of claims 1 to 5,
The rotating electrical machine characterized in that the shape of the conductor bar protruding from the end ring is substantially round. In the rotating electrical machine according to any one of claims 1 to 6,
A substantially cylindrical plate extending from the inner side of the rotating electrical machine of the bearing bracket that holds the bearing of the rotor toward the hole on the inner peripheral side of the rotor of the conductor bar is an inner peripheral side of the rotor The rotating electrical machine is provided so that the liquid dropped from the hole is transmitted to the bearing. In the rotating electrical machine according to any one of claims 1 to 7,
A rotating electrical machine, wherein a cooling fin is provided on an outer periphery of the rotating electrical machine. A train using the rotating electrical machine according to any one of claims 1 to 8,
A train, comprising: a wheel that rotates as the rotor rotates; and a carriage that is provided above the wheel. In the rotating electrical machine according to any one of claims 1 to 7,
A rotating electrical machine, wherein a water cooling jacket is provided on an outer periphery of the rotating electrical machine. A rotating electrical machine system using the rotating electrical machine according to claim 10,
A rotating electrical machine system comprising: a pump that supplies water to the water cooling jacket; a wheel that rotates as the rotor rotates; and a carriage that is provided above the wheel.

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