KR101754707B1

KR101754707B1 - Rotating electric machine

Info

Publication number: KR101754707B1
Application number: KR1020150160666A
Authority: KR
Inventors: 조남준; 이경훈; 이길수
Original assignee: 엘지전자 주식회사
Priority date: 2015-11-16
Filing date: 2015-11-16
Publication date: 2017-07-06
Also published as: KR20170057054A

Abstract

The present invention relates to a rotating electric machine, comprising: a stator; And a rotor relatively moving with respect to the stator, wherein the rotor includes a rotor core having a rotating shaft, a plurality of poles and slots, and rotating about the rotating shaft, a plurality of coil portions And a rotor core provided on at least one side of the rotor core along an axial direction of the rotary shaft and disposed outside the respective coil parts along a radial direction of the rotor core to rotate the coil part against a centrifugal force And a cooling unit provided with a supporting part supporting the supporting part and a plurality of blades provided in the supporting part to promote the flow of air. Thereby, disconnection of the rotor coil can be suppressed and cooling can be promoted.

Description

[0001] ROTATING ELECTRIC MACHINE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary electric machine, and more particularly, to a rotary electric machine capable of suppressing occurrence of disconnection of a rotor and promoting cooling.

As is well known, a rotating electric machine includes an electric motor that converts electric energy into mechanical energy through rotation, and a generator that converts mechanical energy into electric energy.

The rotating electric machine includes a stator and a rotor that rotates with respect to the stator.

The stator includes a stator core having a plurality of slots and a stator coil wound around a slot of the stator core.

The rotor includes a rotating shaft, a rotor core rotating about the rotating shaft, and a permanent magnet or a rotor coil for generating a magnetic force to interact with the stator coil.

In the rotor having the rotor coil, when the rotor rotates, the coil may be broken due to centrifugal force.

In order to prevent this, Korean Patent Registration No. 10-1364028, an electric motor, is disclosed in the name of the present applicant.

However, in such a conventional rotary electric machine having a rotor coil, when the temperature of the rotor coil and the stator coil rises excessively during operation, the output decreases.

KR 10-1364028 B1

Accordingly, it is an object of the present invention to provide a rotary electric machine capable of suppressing disconnection of a rotor coil and promoting cooling.

Another object of the present invention is to provide a rotary electric machine capable of suppressing disconnection of a rotor coil and reducing air resistance during high-speed rotation.

It is still another object of the present invention to provide a rotary electric machine capable of promoting air blowing at a temperature rise and reducing a power input at the time of a temperature drop.

In order to achieve the above object, the present invention provides a stator comprising: a stator; And a rotor relatively moving with respect to the stator, wherein the rotor includes a rotor core having a rotating shaft, a plurality of poles and slots, and rotating about the rotating shaft, a plurality of coil portions And a rotor core provided on at least one side of the rotor core along an axial direction of the rotary shaft and disposed outside the respective coil parts along a radial direction of the rotor core to rotate the coil part against a centrifugal force And a cooling unit provided with a supporting part supporting the supporting part and a plurality of blades provided in the supporting part to promote the flow of air.

In an embodiment, the support portion may include a disk portion coupled to the rotation shaft and disposed in a radial direction, and an outer support portion extending in the axial direction from the disk portion to support an outer periphery of each of the coil portions.

In an exemplary embodiment, the insulator may further include an insulator inserted between the coil portions and the rotor core.

The insulation member may further include an outer insulation portion inserted between the outer brim portion and the ends of the respective coil portions.

In an embodiment, each of the blades is formed by cutting the disk portion and bending to protrude in the axial direction, and a cut portion may be formed on one side of each of the blades.

In one embodiment of the present invention, the outer brim and the blades may protrude in opposite directions along the axial direction of the rotary shaft.

In an exemplary embodiment, a plurality of air vents may be formed through the disc portion on the inner side of the plurality of blades along the radial direction of the rotor core.

In an exemplary embodiment, the outer brim part may have an annular shape, and an inner surface may be configured to support the ends of the respective coil parts at the same time.

In an embodiment, each of the blades includes a fixed portion fixed to the disk portion, a blowing position extended from the fixed portion and spaced apart from the disk portion and arranged to have a first inclination angle with respect to the fixed portion, And a variable portion that moves between resistance reduction positions arranged to have a second inclination angle which is smaller than the first inclination angle with respect to the center.

The first inclination angle may be 7 degrees to 12 degrees.

In an embodiment, the variable portion may be bent so that a free end thereof is closer to the center of the disk portion than the fixed portion.

In an exemplary embodiment, the variable portion may be formed so that the width gradually decreases from the end portion of the fixed portion toward the free end.

The ratio (w2 / w1) of the minimum width (w2) to the maximum width (w1) of the variable portion may be 0.35 to 0.45.

Each of the blades may be configured to move the variable portion from the blowing position to the resistance reducing position by an action of a centrifugal force due to an increase in rotational speed of the rotor when the rotor rotates.

In an embodiment, each of the blades may be formed by overlapping a first member and a second member having different thermal expansion coefficients.

In an embodiment, each of the blades may be formed such that the variable portion is disposed on an extension of the fixing portion, or the variable portion is bent closer to the rotation axis than the fixing portion.

In an embodiment, each of the blades may be configured such that a first member having a small thermal expansion coefficient along the radial direction of the rotor is disposed close to the rotation axis, and the second member is disposed outside the first member.

In an embodiment, each of the blades may be configured such that the variable portion is disposed at the blowing position in a first temperature interval and is disposed at the resistance decrease position in a second temperature interval in which the temperature is lower than the first temperature interval .

In an embodiment, each of the blades may be formed such that the variable portion is disposed on an extension line of the fixing portion, or the variable portion is bent away from the fixing portion so as to be distant from the rotation axis.

In an embodiment, each of the blades has a first member having a small thermal expansion coefficient along the radial direction of the rotor, the first member being disposed outside the second member having a large thermal expansion coefficient, and the second member being disposed inside the first member . &Lt; / RTI >

As described above, according to the embodiment of the present invention, it is possible to suppress the disconnection of the rotor coil by providing the cooling support unit having the support portion for supporting the coil portion against centrifugal force and the cooling portion for promoting the flow of air. And cooling can be promoted.

In addition, since the blade is provided with the variable portion that is variable with respect to the fixed portion by the action of the fixed portion and the centrifugal force, when the speed of the rotor increases, the air resistance is varied so as to decrease, .

In addition, since the first member and the second member having different thermal expansion coefficients are overlapped and attached to each other, the blades accelerate the blowing of air at a temperature rise and reduce the resistance at the time of temperature drop so that the power input of the rotor can be reduced have.

1 is a cross-sectional view of a rotating electric machine according to an embodiment of the present invention,
Figure 2 is a partial cross-sectional view of the rotor of Figure 1,
3 is a perspective view for explaining a combination of the rotor core, the insulating member, and the cooling support unit of FIG. 1,
Fig. 4 is an exploded perspective view of the rotor of Fig. 1,
Figure 5 is a perspective view of the insulation member of Figure 4,
6 is a front view of the insulating member of Fig. 5, Fig.
Figure 7 is a front view of the cooling support unit of Figure 5,
8 is a cross-sectional view of a rotating electric machine according to another embodiment of the present invention,
Figure 9 is a side view of the rotor of Figure 8,
10 is a front view of the insulating member of Fig. 8, Fig.
Figure 11 is a perspective view of the cooling support unit of Figure 8,
Figure 12 is a perspective view of the blade of Figure 8,
Figure 13 is a side view of the blade of Figure 12,
Figure 14 is a top view of the blade of Figure 8,
Fig. 15 is a view for explaining the action of the blade of Fig. 8,
16 is a side view of a rotor according to another embodiment of the present invention;
17 is a modification of the blade of Fig. 16,
FIG. 18 is a view for explaining the action of the blade of FIG. 16,
19 is a modification of the blade of Fig. 16,
Fig. 20 is a modification of the blade of Fig. 19,
Fig. 21 is a view for explaining the action of the blade of Fig. 19;

Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the accompanying drawings. In this specification, the same or similar reference numerals are given to the same or similar components in different embodiments, and the description thereof is replaced with the first explanation. As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. In addition, it should be noted that the attached drawings are only for easy understanding of the embodiments disclosed in the present specification, and should not be construed as limiting the technical idea disclosed in the present specification by the attached drawings.

1, a rotating electric machine according to an embodiment of the present invention includes a stator 130; And a rotor 160 that moves relative to the stator 130. The rotor 160 includes a rotating shaft 161, a plurality of pawls 176 and a slot 180, A rotor coil 171 having a plurality of coils 195 wound around the pole 176 and a rotor coil 191 having a plurality of coils 195 wound around the pole 176, And are provided on both sides of the rotor core 171 and are provided outside the respective coil parts 195 along the radial direction of the rotor core 171 to support the coil part 195 against the centrifugal force And a cooling support unit 230a provided with a support part 231 and a plurality of blades 255 provided on the support part 231 and having a cooling part 251 for promoting the flow of air.

For example, a frame 110 may be provided outside the stator 130.

The frame 110 may be formed to correspond to the shape of the stator 130 so that the stator 130 can be accommodated therein, for example.

The frame 110 may have, for example, a cylindrical shape whose both sides are opened.

At both ends of the frame 110, for example, a bracket 115 may be provided.

The stator 130 may include, for example, a stator core 131 and a stator coil 141 wound around the stator core 131.

The stator core 131 may include a rotor receiving hole in which the rotor 160 is rotatably received.

In the stator core 131, for example, a plurality of slots and teeth may alternately be provided along the circumferential direction of the rotor accommodating hole 135.

The stator core 131 may be formed by insulating and stacking a plurality of electrical steel plates 133 each having the rotor accommodating hole 135, the slots 136, and the teeth 137.

The stator coil 141 may be constituted by, for example, a distributed winding that is wound around the plurality of slots 136.

2 to 4, the rotor 160 includes a rotation shaft 161, a plurality of pawls 176, and a slot 180, and the rotation shaft 161 A rotor coil 191 having a plurality of coil parts 195 wound around the pawl 176 and a plurality of coil parts 195 wound around the rotor core 171 along the axial direction of the rotating shaft 161. [ A support portion 231 provided on at least one side of the rotor core 171 and provided outside the respective coil portions 195 along the radial direction of the rotor core 171 to support the coil portion 195 against centrifugal force, And a cooling unit 230a having a plurality of blades 255 provided on the support unit 231 and having a cooling unit 251 for promoting the flow of air.

The rotation shaft 161 may extend to both sides of the rotor 160.

Both ends of the rotation shaft 161 can be rotatably supported.

The rotation shaft 161 may be rotatably supported by a bearing 117 provided on the bracket 115.

A power supply unit 165 for supplying power to the rotor coil 191 may be provided at one side of the rotating shaft 161. [

The power supply unit 165 may be provided inside the frame 110, for example.

The power supply unit 165 may include a slip ring 167 coupled to the rotating shaft 161 and rotating and a brush 168 electrically connected to the slip ring 167 have.

The rotation shaft 161 may be coupled to the center of the rotor core 171.

In the rotor core 171, for example, the pawls 176 and the slots 180 may be alternately arranged along the circumferential direction.

Each of the pawls 176 may be configured to include a pole piece 178 extending to both sides along the circumferential direction at the end portion.

Each of the pole pieces 178 has an arc-shaped outer peripheral surface 179a having the same outer diameter and a straight inner surface 179b arranged vertically outwardly in both lateral directions with respect to the side surface of the pawl 176, for example. As shown in FIG.

Accordingly, each of the pole pieces 178 can be configured to have both ends 179c whose widths are reduced compared to the center.

In the rotor core 171, for example, the shaft hole 175 may be formed to allow the rotation shaft 161 to be inserted into the center thereof.

The rotor core 171 may be formed by insulating a plurality of electrical steel plates 173 each having the shaft hole 175, the pawl 176 and the slot 180, for example.

The rotor coil 191 may be constituted by a plurality of coil parts 195 which are concentrically wound around the respective pawls 176, for example.

Here, each coil portion 195 may be wound, for example, in a layer around each of the pawls 176 and the outermost layer may be wound in close proximity to both ends 179c of the pole piece 178 have.

Thereby, more coil conductors can be wound around the respective coil portions 195, and the coil conductor length (coil amount, copper amount) is substantially increased, and the output can be improved.

The outer end portions of the coil portions 195 may be guided along the inner surface 179b of the respective pole shoes 178 to be substantially linear.

An insulating member 210 having electrical insulation for insulation between the respective coil portions 195 and the rotor core 171 as electrical conductors is provided between the coil portions 195 and the rotor core 171 .

The cooling support unit 230a may be provided at both ends of the rotor core 171 along the axial direction of the rotary shaft 161. [

5 and 6, the insulating member 210 includes a disc portion 212 and a plurality of protrusions 217 formed around the disc portion 212 in the radial direction corresponding to the respective pawls 176. [ And may include an extending extension 216.

The insulating member 210 may be provided with an outer insulating portion 218 for insulating the ends of the coil portions 195, for example.

The disc portion 212 may be formed with a through-hole 214 so that the rotation shaft 161 can pass through the disc.

The disc portion 212 and the extension portion 216 may be arranged on the same plane.

The outer insulation portion 218 may be formed to be bent from the end of each of the extension portions 216 so as to be disposed along the axial direction of the rotation shaft 161.

Each of the outer insulation portions 218 may be bent in a direction away from the rotor core 171 so as to be contactable with the ends of the coil portions 195.

Each of the outer insulation portions 218 may be formed in a rectangular shape, for example.

Each of the outer insulation portions 218 may be configured to have an extended width (length) as compared with the width (circumferential length) of the ends of the coil portions 195, for example.

On the other hand, the cooling support unit 230a may be formed of, for example, a metal member having excellent rigidity.

More specifically, the cooling support unit 230a may be made of, for example, a cold-rolled steel sheet.

The cooling support unit 230a includes a support portion 231 for supporting the coil portion 195 against centrifugal force and a plurality of blades 255 provided on the support portion 231 to facilitate the flow of air A cooling unit 251 may be provided.

7, the support portion 231 includes a disk portion 233 coupled to the rotation shaft 161 and disposed along the radial direction of the rotation shaft 161, and a disk portion 233 disposed on the disk portion 233, And an outer frame portion 240 that is bent at the outer periphery of the rotor coil 191 and is disposed at the outer periphery of the rotor coil 191.

The disc portion 233 may have a disc shape having an outer diameter set in advance, for example.

The disc portion 233 may be formed in a disc shape having the same thickness, for example.

The disk portion 233 may have an outer diameter that is smaller than the outer diameter of the rotor core 171, for example.

For example, the outer frame portion 240 may have a plurality of outer frame portions 240 so as to be in contact with the end portions of the coil portions 195, respectively.

As a result, the amount of conductor (the amount of coil and the amount of copper) to be wound around each of the pawls 176 substantially increases, and the output can be increased.

Each of the outer support portions 240 may be formed in a rectangular shape, for example.

Each of the outer support portions 240 may be configured to have a reduced width (circumferential length), for example, in comparison with the width (circumferential length) of the end portion of the coil portion 195.

A plurality of connection portions 237 connecting the disk portion 233 and the respective outer support portions 240 may be provided on the outer circumference of the disk portion 233, respectively.

Each of the connecting portions 237 may be formed to have a reduced width (circumferential width) as compared with the outer supporting portion 240.

Meanwhile, the disk unit 233 may be provided with a cooling unit 251 to facilitate the flow of air during rotation.

The cooling unit 251 may include a plurality of blades 255 protruding in the axial direction from the disk unit 233, for example.

Each of the blades 255 may be formed by cutting the disk portion 233 into a predetermined shape to form the shape of the blade 255 and pressing the blade 255 in the axial direction have.

A cutout 257 may be formed on one side of each of the blades 255 so as to correspond to the shape of the blade 255.

Each of the blades 255 may be configured to have, for example, a rectangular shape.

For example, each of the blades 255 may be formed such that three sides of the square except for one side are separated from the disk and bent along the one side so that the other three sides are protruded.

Each of the blades 255 may be inclined at a predetermined angle with respect to the radial direction of the disc portion 233.

Each of the blades 255 may be disposed at an acute angle with respect to the blade 255 and the cutout 257.

Each of the blades 255 may be formed such that the outer circumferential end of the fixed one side is disposed behind the center side end when rotated.

As a result, the flow of air during the rotation of the blades 255 is smooth and the generation of noise can be suppressed.

The number of the blades 255 may be greater than the number of the outer insulation units 218.

Thereby, the amount of airflow can be increased while reducing the axial protrusion length of each blade 255.

In this embodiment, the number of the coil parts 195 is eight, and the number of the blades 255 is twelve.

Here, the number of the coil parts 195 and the number of the blades 255 may be appropriately adjusted.

Each of the blades 255 may be formed to protrude in a direction away from the rotor core 171, for example.

Each of the blades 255 may be formed to protrude in a direction opposite to the outer supporting portion 240, for example.

The cooling unit 251 may include a plurality of ventilation holes 259 formed in the inner side of the blades 255 in the radial direction of the disk unit 233.

As a result, air can flow between the inside and the outside of the disk portion 233, and cooling can be promoted.

With this configuration, the insulating member 210 is disposed at both ends of the rotor core 171, and each of the coil parts 195 can be wound around each of the pawls 176.

Each coil part 195 and the rotor core 171 may be insulated by the insulating member 210.

When the winding of the rotor coil 191 is completed, the cooling support units 230a may be coupled to both ends of the rotor core 171, respectively.

The inner surface of the disk portion 233 of each cooling support unit 230a may be in contact with the respective coil portions 195, respectively.

The outer peripheries 240 may be disposed along the radial direction of the rotor core 171 and at outer peripheries of the outer ends of the coil portions 195, respectively.

The outer insulation portion 218 may be disposed between each outer frame portion 240 and an outer end portion of the coil portion 195.

Thus, the outer frame portion 240 and the coil portion 195 are electrically insulated from each other, and the coil portion 195 can be supported by the outer frame portion 240 against centrifugal force.

When the operation is started and power is supplied to the stator coil 141 and the rotor coil 191, the magnetic force generated by the stator coil 141 and the magnetic force generated by the rotor coil 191 So that the rotor 160 can be rotated around the rotation shaft 161. [

When the rotor 160 starts to rotate, the flow of air can be promoted by the blades 255 of the cooling support units 230a.

The air can flow from the center side to the outside along the radial direction of the disk portion 233 when the cooling support unit 230a rotates.

A part of the air outside the disc portion 233 flows into the inside of the disc portion 233 through the air vent and a part of the air inside the disc portion 233 flows into the cut portion 257 So that it can flow outwardly.

As a result, the flow of air in and out of the disc portion 233 of each cooling support unit 230a is promoted, and cooling of the rotor coil 191 can be promoted.

The air moved outward along the radial direction of the cooling support unit 230a can quickly cool the stator coil 141 (the coil end 141a of the stator coil 141).

Hereinafter, another embodiment of the present invention will be described with reference to FIGS. 8 to 15. FIG.

Parts which are the same as or equivalent to those in the above-described construction and the same reference numerals will be omitted from the drawings and the same reference numerals will be referred to for explanation. Redundant description of some configurations is omitted and the above description is replaced.

[2]

The rotating electric machine of this embodiment includes, for example, a stator 130, as shown in Fig. 8; And a rotor 160 that moves relative to the stator 130. The rotor 160 includes a rotating shaft 161, a plurality of pawls 176 and a slot 180, A rotor coil 171 having a plurality of coils 195 wound around the pole 176 and a rotor coil 191 having a plurality of coils 195 wound around the pole 176, And are provided on both sides of the rotor core 171 and are provided outside the respective coil parts 195 along the radial direction of the rotor core 171 to support the coil part 195 against the centrifugal force And a cooling support unit 230b having a support part 231 and a plurality of blades 260 provided on the support part 231 and having a cooling part 251 for promoting the flow of air.

The rotor 160 may include a rotating shaft 161, a rotor core 171 coupled to the rotating shaft 161, and a rotor coil 191 wound around the rotor core 171, as described above .

An insulating member 210 may be provided between the rotor core 171 and the rotor coil 191.

10, the insulating member 210 includes a disc portion 212 and an extension portion 216 extending from the outer periphery of the disc portion 212 corresponding to each of the pawls 176, And an outer insulation part 218 bent in the axial direction at the end of the extension part 216. [

The outer insulating portion 218 of this embodiment can be formed to be in surface contact with the inner surface of the outer support portion 241 of the cooling support unit 230b.

For example, the outer peripheral insulator 218 may have a radius of curvature equal to the radius of curvature of the inner peripheral surface of the outer peripheral portion 241.

On the other hand, the cooling support unit 230b may be configured to have a cylindrical shape, for example, as shown in Fig.

More specifically, each of the cooling support units 230b includes a disk portion 233, a disk portion 233, and a plurality of cooling support portions 230b. The cooling portion 230b is bent in the axial direction from the disk portion 233, extends in the circumferential direction, And an outer frame portion 241 formed on the outer frame portion.

The outer frame portion 241 may be formed in a circular ring shape, for example.

Thus, the outer insulation portion 218 disposed on the outer side of each of the coil portions 195 can be simultaneously brought into contact with the inner diameter surface of the outer support portion 241. [

A shaft hole may be formed at the center of the disc portion 233 to allow the rotation shaft 161 to be inserted therethrough.

A plurality of disk ventilation holes 236 may be formed in the disk portion 233 through the disk portion 233 outside the shaft hole.

A plurality of perforated supporting pipe holes 242 may be formed in the perforated supporting portion 241, for example, through the perforated supporting portion 241.

Each of the cooling support units 230b may be provided with a plurality of blades 260 for promoting the flow of air during rotation.

12 to 14, the blades 260 may include a fixing portion 262 fixed to the disc portion 233 and a fixing portion 262 extending from the fixing portion 262, And a second inclination angle? 1 which is smaller than the first inclination angle? 1 with respect to the fixed portion 262. The second inclination angle? 1 is smaller than the first inclination angle? 1 with respect to the fixed portion 262, and a variable portion 264 that moves between the resistance reduction positions, which are disposed so as to have the angle? 2.

Each of the blades 260 is configured such that the variable portion 264 is moved from the blowing position to the resistance reducing position by an action of a centrifugal force due to an increase in rotational speed of the rotor 160 when the rotor 160 rotates .

Each of the blades 260 may be constituted by a member capable of being elastically deformed.

Each of the blades 260 may be formed of a synthetic resin member.

Each of the blades 260 may be formed of a metal member.

The blades 260 may be spaced from each other along the circumferential direction on the same circumference from the center of the disk portion 233.

Each of the blades 260 may be disposed such that the fixing portion 262 is positioned in front of the variable portion 264 when the blade 262 rotates.

The front end of the fixing portion 262 may be configured to have, for example, an arcuate cross section.

Thereby, the flow resistance of the air can be reduced.

The fixing portions 262 of the respective blades 260 may be configured to have the same thickness, for example.

The fixing portion 262 may have a protrusion 265 protruding for fixing to the disc portion 233 as compared to the variable portion 264, for example, as shown in FIGS. 12 and 13 have.

Accordingly, the variable portion 264 can be separated from the surface of the disk portion 233 and can be easily deformed.

The protrusion 265 may be coupled to the disc portion 233 by an adhesive, welding, or bonding.

The protrusion 265 may be configured to be coupled to the disc portion 233 by screwing, riveting, and / or caulking.

13, the variable portion 264 can be extended to have a first inclination angle? 1 from one side of the fixing portion 262 when the centrifugal force is not applied.

The first inclination angle? 1 may be, for example, 7 degrees to 12 degrees.

For example, the free end of the variable portion 264 may be bent so as to be closer to the center of the disk portion 233 or the rotation axis 161 than the fixed portion 262.

The variable portion 264 may be formed to have a gradually decreasing width as it goes from the end of the fixing portion 262 toward the free end thereof.

The end of the variable portion 264 on the side of the fixing portion 262 may have a maximum width w1 and the free end may have a minimum width w2.

The ratio (w2 / w1) of the minimum width w2 to the maximum width w1 of the variable portion 264 may be 0.35 to 0.45.

The insulating member 210 is disposed at both ends of the rotor core 171 and the extended portion 216 of the insulating member 210 and the periphery of the pawl 176 of the rotor core 171 The respective coil portions 195 can be wound around the coil portion 195. [

When the winding of the rotor coil 191 is completed, the cooling support unit 230b may be coupled to both sides of the rotor core 171 along the axial direction.

The outer circumferential surfaces of the respective outer insulation portions 218 of the insulation member 210 may be simultaneously in surface contact with the inner circumferential surface of the outer support portion 241 of each cooling support unit 230b.

Meanwhile, when the coupling is completed and power is supplied to the stator coil 141 and the rotor coil 191, the rotor 160 can be rotated around the rotation shaft 161. [

When the rotor 160 starts to rotate, each of the blades 260 starts to rotate at the air blowing position and can be promoted as a flow of air.

Each of the coil portions 195 is supported by the outer support portion 241 and can be restrained from being radially detached from the rotor core 171 by the action of the centrifugal force.

When each of the blades 260 is rotated, air can flow from the outer periphery of the disc portion 233 to the center side along the radial direction of the cooling support unit 230b.

Thereby, cooling of the coil end 141a of the stator coil 141 can be promoted.

The air flowing toward the center of the disk portion 233 can be moved along the axial direction of the rotation shaft 161.

A part of the air outside the outer brim part 241 flows into the inside of the outer brim part 241 through the outer brim ventilation hole 242 and flows to the outside of the disk via the disk vent hole 236. [ .

Thereby, the cooling of the coil end 191a of the rotor coil 191 can be promoted.

On the other hand, as the rotational speed of the rotor 160 increases, the magnitude of the centrifugal force acting on the respective blades 260 can be increased.

As the centrifugal force acting on each of the blades 260 increases, the inclination angle of the variable portion 264 with respect to the fixed portion 262 of each of the blades 260 may be reduced.

16, when the rotational speed of the rotor 160 reaches a preset speed, the respective blades 260 are arranged such that the variable portion 264 is disposed on an extension line of the fixing portion 262 Can be placed in the resistance reduction position.

Accordingly, the air resistance of the variable portion 264 is reduced, and the power input of the rotor 160 can be reduced.

Hereinafter, another embodiment of the present invention will be described with reference to Figs. 16 to 21. Fig.

[3]

The rotating electrical machine of this embodiment includes a stator 130; And a rotor 160 that moves relative to the stator 130. The rotor 160 includes a rotating shaft 161, a plurality of pawls 176 and a slot 180, A rotor coil 171 having a plurality of coils 195 wound around the pole 176 and a rotor coil 191 having a plurality of coils 195 wound around the pole 176, And are provided on both sides of the rotor core 171 and are provided outside the respective coil parts 195 along the radial direction of the rotor core 171 to support the coil part 195 against the centrifugal force A cooling support unit 230b (see FIG. 17) provided with a support part 231 and a plurality of blades 270a provided on the support part 231 and having a cooling part 251 for promoting the flow of air Lt; / RTI >

The cooling support unit 230b of the present embodiment may be configured to have a cylindrical shape with a disk portion 233 and an outer support portion 241, for example, as shown in Fig.

A plurality of outer supporting vent holes 242 may be formed in the outer supporting portion 241 of the cooling and supporting unit 230b to allow air to pass therethrough.

A plurality of disk ventilation holes 236 may be formed in the disk portion 233 of the cooling support unit 230b to allow air to pass therethrough.

A plurality of blades 270a may be formed on the disc portion 233.

Each of the blades 270a may be formed so as to protrude in a direction opposite to that of the outer support portion 241 along the axial direction.

Each of the blades 270a includes a fixing portion 262 fixed to the disc portion 233 and a fixing portion 262 extending from the fixing portion 262 and spaced from the disc portion 233, The second inclined angle? 2 is smaller than the first inclined angle? 1 with respect to the fixed portion 262 and the second inclined angle? 2 is smaller than the first inclined angle? And a movable variable portion 264, respectively.

Each of the blades 270a may be formed by overlapping a first member 272 and a second member 274 having different thermal expansion coefficients.

Accordingly, the shape of each of the blades 270a is deformed according to the temperature change, so that the air volume and the air resistance can be adjusted.

On the other hand, the cooling support unit 230b may be configured to have a plurality of blades 271a disposed on an extension of the fixed portion 262, for example, as shown in Fig. 18 have.

Thereby, it is possible that almost no air flows during rotation of each of the blades 271a at a relatively low temperature (low temperature) such as room temperature.

Thereby, the power input of the rotor coil 191 can be reduced.

Each of the blades 270a may be arranged to have a small inclination angle so that the variable portion 264 is disposed closer to the rotation axis 161 with respect to the fixed portion 262. [

As a result, when the blade 270a rotates at room temperature, the air on the outer periphery of the disk portion 233 is moved toward the center along the radial direction, and the air on the center side is formed into a flow of air moving along the axial direction .

The first member 272 having a small thermal expansion coefficient along the radial direction of the rotor 160 is disposed close to the rotation shaft 161 and the second member 274 And may be disposed outside the first member 272.

Accordingly, when the temperature of each of the blades 270a rises, the variable portion 264 of each of the blades 270a is deformed so as to be located closer to the rotation axis 161 side, and the flow of air can be further promoted.

When the temperature of each of the blades 270a is lowered, the variable portion 264 of each of the blades 270a is deformed in a direction in which the inclination angle with the fixed portion 262 decreases (in a direction away from the rotation axis 161) The air resistance can be reduced.

The insulating member 210 may be disposed at both ends of the rotor core 171 and the rotor coil 191 may be wound around each of the pawls 176. [

The cooling support units 230b may be coupled to both ends of the rotor core 171, respectively.

Each of the outer insulation portions 218 may be in surface contact with the inner diameter surface of the outer support portion 241 at the same time.

On the other hand, when the power is applied and operation is started, the rotor 160 can be rotated about the rotation shaft 161.

When each of the blades 270a is rotated, the air on the outer periphery of the disk 233 is moved along the radial direction, and the center air can be moved outward along the axial direction.

Thereby, cooling of the coil end 141a of the stator coil 141 can be promoted.

The air is moved to the inside of the outer support portion 241 through the outer supporting cylinder air hole 242 and the air is moved outward through the disk ventilation holes 236 to move the coil end 191a of the rotor coil 191 Can be promoted.

When the temperature of each of the blades 270a is raised due to an increase in the heat generating action such as a rise in the power input of the stator coil 141 and the rotor coil 191, the respective blades 270a have the variable portion 264, The flow of the air can be promoted by being deformed close to the side of the air outlet 161 side.

Thus, the cooling of the stator coil 141 and the rotor coil 191 can be promoted.

When the temperature of each of the blades 270a is lowered, the second member 274 is contracted and deformed more than the first member 272, The inclination angle with respect to the inclined surface 262 can be reduced.

That is, the variable portion 264 may be deformed in a direction away from the rotation shaft 161. [

Accordingly, the air resistance of each of the blades 270a is reduced, so that the power input of the rotor coil 191 can be reduced.

On the other hand, the cooling support unit 230b can be provided with a plurality of blades in which the variable portion 264 is bent so as to be located farther from the center of the disk portion 233 than the fixed portion 262 as shown in Fig. 19 .

Accordingly, a flow of air can be formed from the inner side to the outer side along the radial direction of the disk portion 233 when the blades 270b rotate.

More specifically, air can be introduced along the axial direction through the disk ventilation holes 236 and moved along the radial direction to allow air to flow out through the enclosure supporting vent holes 242.

Thereby, the cooling of the coil end 191a of the rotor coil 191 and the coil end 141a of the stator coil 141 can be promoted.

In the present embodiment, the variable blades 264 are bent at a higher temperature than the fixed portions 262 so as to be located further away from the rotation axis 161, but these are only examples.

As shown in Fig. 21, the cooling support unit 230b may be configured to include a plurality of blades 271b configured such that the variable portion 264 is disposed on an extension of the fixed portion 262. [

In addition, the degree of bending (inclination angle) of the variable portion 264 of each blade 270b with respect to the fixed portion 262 at room temperature can be appropriately adjusted in consideration of the air flow rate and the like.

Each of the blades 270b may be formed by overlapping a first member 272 and a second member 274 having different thermal expansion coefficients, as described above.

As shown in FIG. 21, for example, each of the blades 270b is arranged such that the variable portion 264 is disposed in the blowing position in a first temperature interval, and the second portion 270b having a temperature lower than the first temperature interval And may be arranged to be placed in the resistance reduction position in a temperature interval.

With this configuration, when the rotor 160 starts to rotate and the respective blades 270b rotate, the flow of air can be promoted even when the temperature of each of the blades 270b does not rise relatively.

When the temperature of each of the blades 270b is raised by the heating action of the stator coil 141 and the rotor coil 191 due to the rise of the power input or the like, the second member 274 is extended, , The variable portion 264 can be bent and deformed to the air blowing position in a direction away from the rotary shaft 161 (outward direction) as compared with the fixed portion 262. [

As a result, the air volume of the air is increased, and the cooling of the stator coil 141 and the rotor coil 191 can be promoted.

When the temperature of each of the blades 270b is lowered, the variable member 264 of each of the blades 270b is contracted more than the first member 272 of the second member 274, The blade 270b can be deformed to the resistance reducing position in a direction in which the inclination angle of the variable portion 264 with the fixing portion 262 is reduced.

Accordingly, the air resistance by each of the blades 270b is reduced, and the power input of the rotor coil 191 can be reduced.

The foregoing has been shown and described with respect to specific embodiments of the invention. However, the present invention may be embodied in various forms without departing from the spirit or essential characteristics thereof, so that the above-described embodiments should not be limited by the details of the detailed description.

Further, even when the embodiments not listed in the detailed description have been described, it should be interpreted broadly within the scope of the technical idea defined in the appended claims. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

110: frame 115: bracket
117: bearing 130: stator
131: stator core 133, 173: electric steel plate
135: rotor receiving hole 136,180: slot
137: Tees 141: Stator coils
141a, 191a: coil end 160: rotor
161: rotating shaft 165: power supply unit
167: Slip ring 168: Brush
171: rotor core 175,235:
176: Paul 178: Paulsch
179a, 219: outer circumferential surface 179b: inner surface
179c: end 191: rotor coil
210: Insulating member 212:
214: penetrating part 216: extension part
218: outer insulation part 230a, 230b: cooling support unit
231: Support part 233: Disk part
236: Disk unit air hole 237:
240, 241: outer frame part 242:
251: Cooling section 255, 260, 270a, 270b, 271a, 271b:
262: Fixing portion 264:
265: protrusion 272: first member
274: second member

Claims

Stator; And a rotor that moves relative to the stator,
The rotor may include:
Rotation axis,
A rotor core rotating about the rotation axis,
A rotor coil having a plurality of coil portions, and
And a cooling unit provided with a support for supporting the plurality of coil parts against centrifugal force and a cooling part for promoting the flow of air by having a plurality of blades provided in the support part,
Wherein the support portion includes a disc portion coupled to the rotation shaft and disposed in a radial direction and an outer support portion extending in the axial direction from the disc portion to support an outer periphery of the plurality of coil portions,
Wherein the plurality of blades include a fixed portion fixed to the disk portion and an air blowing position extending in the circumferential direction from the fixed portion and axially spaced from the disk portion and arranged to have a first inclination angle with respect to the fixed portion, And a variable portion that moves between the resistance reduction positions arranged to have a second inclination angle smaller than the first inclination angle with respect to the fixed portion and are disposed apart from each other along the circumferential direction,
The plurality of blades are formed of an elastic member and are elastically deformed by the action of a centrifugal force due to an increase in rotational speed of the rotor when the rotor rotates and are respectively moved from the air blowing position to the resistance reducing position A rotating electrical machine.

delete

The method according to claim 1,
Wherein a plurality of air vents are formed in the inside of the plurality of blades along a radial direction of the rotor core so as to penetrate the disk portion.

The method according to claim 1,
Wherein the outer frame portion has an annular shape, and an inner surface of the outer frame portion is configured so that end portions of the plurality of coil portions are simultaneously supported.

delete

The method according to claim 1,
Wherein the first inclination angle is 7 degrees to 12 degrees.

The method according to claim 1,
And the variable portion is formed to be bent from the center of the disk portion so as to be disposed closer to the fixing portion.

The method according to claim 1,
And the variable portion is formed so that the width gradually decreases from the end portion of the fixed portion toward the free end portion.

13. The method of claim 12,
And the ratio (w2 / w1) of the minimum width (w2) to the maximum width (w1) of the variable portion is 0.35 to 0.45.

delete

Stator; And a rotor that moves relative to the stator,
The rotor may include:
A rotor core rotating about the rotation axis,
A rotor coil having a plurality of coil portions, and
And a cooling unit provided with a support for supporting the plurality of coil parts against centrifugal force and a cooling part for promoting the flow of air by having a plurality of blades provided in the support part,
Wherein the support portion includes a disc portion coupled to the rotation shaft and disposed in a radial direction and an outer support portion extending in the axial direction from the disc portion to support an outer periphery of the plurality of coil portions,
Wherein the plurality of blades include a fixed portion fixed to the disk portion and an air blowing position extending in the circumferential direction from the fixed portion and axially spaced from the disk portion and arranged to have a first inclination angle with respect to the fixed portion, And a variable portion that moves between the resistance reduction positions arranged to have a second inclination angle smaller than the first inclination angle with respect to the fixed portion and are disposed apart from each other along the circumferential direction,
Wherein the plurality of blades are formed by overlapping a first member and a second member having mutually different thermal expansion coefficients so as to be in surface contact with each other,
Wherein the plurality of blades are respectively provided in the support portions such that the first member and the second member are disposed along the radial direction of the rotor,
Wherein the plurality of blades are changed in shape according to a temperature change and are respectively moved to the air blowing position and the resistance reducing position.

16. The method of claim 15,
Wherein the plurality of blades are each bent so that the variable portion is disposed on an extension line of the fixed portion or the variable portion is disposed closer to the rotation axis than the fixed portion.

17. The method of claim 16,
Wherein the plurality of blades are arranged such that a first member having a small thermal expansion coefficient along the radial direction of the rotor is disposed close to the rotation axis, respectively, and the second member is disposed outside the first member.

18. The method of claim 17,
Wherein the plurality of blades are respectively disposed at the air blowing position in the first temperature interval and in the resistance decrease position in the second temperature interval in which the temperature is lower than the first temperature interval, machine.

16. The method of claim 15,
Wherein the plurality of blades are each bent so that the variable portion is disposed on an extension line of the fixed portion or the variable portion is disposed farther from the rotation axis than the fixed portion.

20. The method of claim 19,
The first member having a small thermal expansion coefficient along the radial direction of the rotor is disposed on the outer side of the second member having a large thermal expansion coefficient and the second member is disposed on the inner side of the first member Characterized by a rotating electrical machine.

21. The method of claim 20,
Wherein the plurality of blades are respectively disposed at the air blowing position in the first temperature interval and in the resistance decrease position in the second temperature interval in which the temperature is lower than the first temperature interval, machine.