JP6867970B2 - Pole-type rotary electric machine and rotor - Google Patents

Description

The present invention relates to a salient pole type rotary electric machine and its rotor as a rotor.

The winding type rotary electric machine includes a rotor and a stator, and the rotor is provided with a rotor winding. Examples of the winding type rotary electric machine include a winding type induction rotary electric machine and a synchronous rotary electric machine. The shape of the rotor of the winding type rotary electric machine generally includes a cylindrical shape and a salient pole shape.

Japanese Unexamined Patent Publication No. 10-42502

In the salient pole type rotary electric machine, in order to prevent the rotor winding conductor rotating together with the rotor shaft from popping out due to the centrifugal force, the rotor winding conductor is for fixing to be securely fixed to the rotor shaft side. Members are provided.

There is a problem that the fixing member needs to reliably remove the Joule heat generated in the coil conductor.

Therefore, an object of the present invention is to more reliably cool the rotor winding conductor in a salient pole type rotary electric machine.

In order to achieve the above object, the present invention presents the rotor shaft extending in the axial direction and rotatably supported, and the shaft mounted on the radial outer side of the rotor shaft and arranged at intervals in the circumferential direction. Holds a rotor core in which a plurality of core salient poles extending in a direction are formed, a rotor winding having a rotor winding conductor wound around the rotor core, and the rotor winding conductor. A rotor having a winding conductor holding structure, a stator core provided so as to surround the rotor core on the radial outer side of the rotor core, and the stator core penetrating in the axial direction. A salient pole type rotary electric machine including a stator having a stator winding and two bearings rotatably supporting the rotor shaft on both sides of the rotor shaft in the axial direction with the rotor core interposed therebetween. The winding conductor holding structure is arranged on the radial outer side of the rotor winding conductor arranged on each of the plurality of iron core salient poles and on both sides in the circumferential direction thereof, and is centrifugally outward in the radial direction. The outside of the facing surfaces of the plurality of pole heads that resist the force and the two rotor winding conductors arranged in the circumferential partition space sandwiched between the plurality of iron core salient poles adjacent to each other. A plurality of coil brackets arranged at intervals in the axial direction and a plurality of bolts for fixing the coil bracket to the rotor core are provided, and the coil bracket is provided with the cooling gas. A cooling gas axial flow passage that allows passage in the axial direction is formed, and the rotor is arranged on the rotor shaft on both sides in the axial direction with respect to the rotor core, and the rotor is arranged in the axial direction. It has a two fan driving the cooling gas to the rotor core along a between one and the axial direction of the center position of the circumferential partitioned space of the two of the fan, the two A plurality of the coil brackets of the same number are arranged between the other of the fans and the center position, and the coil brackets are not arranged at the center position, and the two fans provide the same number of coil brackets. The driven cooling gas travels from both sides in the axial direction toward the center position with respect to the center position, collides with each other at the center position, and flows out from the circumferential partition space to the outside in the radial direction. , Characterized by.

Further, the present invention is a rotor of a salient pole type rotary electric machine, and a rotor shaft that extends in the axial direction and is rotatably supported, and a rotor shaft that is attached to the radial outer side of the rotor shaft and is spaced apart from each other in the circumferential direction. A rotor core in which a plurality of core salient poles extending in the axial direction are formed, a rotor winding wound around the rotor core, and both sides in the axial direction with respect to the rotor core. It is provided with two fans arranged on the rotor shaft and driving a cooling gas toward the rotor core side along the axial direction, and the rotor winding is formed of the plurality of iron core salient poles. Two radial directions of the rotor winding conductor wound around each and the rotor winding conductors adjacent to each other in each circumferential partition space sandwiched between the plurality of iron core salient poles adjacent to each other. The width of the winding conductor side plate which is arranged so as to surround the outside and extends in the axial direction and the winding conductor side plate which is arranged so as to be spaced apart from each other in the axial direction of the circumferential partition space. The coil bracket is provided with a plurality of coil brackets having a corresponding width and provided in close contact with the winding conductor side plate, and a plurality of bolts for fixing the coil bracket to the rotor core. Is formed so that the cooling gas in the axial direction can pass through , and is between one of the two fans and the axial center position of the circumferential partition space, and the other of the two fans. A plurality of the coil brackets of the same number are arranged between the center position and the center position, and the coil brackets are not arranged at the center position, and the cooling is driven by the two fans. The gas travels from both sides in the axial direction toward the center position with respect to the center position, collides with each other at the center position, and flows out from the circumferential partition space to the outside in the radial direction. ..

According to the present invention, in the salient pole type rotary electric machine, the rotor winding conductor can be cooled more reliably.

It is a vertical sectional view which shows the structure of the salient pole type rotary electric machine which concerns on 1st Embodiment. FIG. 3 is a cross-sectional view taken along the line II-II of FIG. 3 showing a configuration of a rotor of a salient pole type rotary electric machine according to the first embodiment. FIG. 2 is a plan view taken along the line III-III of FIG. 2 showing a configuration of a rotor of a salient pole type rotary electric machine according to a first embodiment. It is a top view which shows the coil bracket of the rotor which concerns on 1st Embodiment. It is a front view which shows the coil bracket of the rotor which concerns on 1st Embodiment. It is a side view which shows the coil bracket of the rotor which concerns on 1st Embodiment. It is a partial plan view which shows a part of a fan about the fan blade of the rotor which concerns on 1st Embodiment. It is a front view of the VIII-VIII arrow portion of FIG. 7 showing a part of the fan centering on the fan blade of the rotor according to the first embodiment. It is a side view of the IX-IX arrow view part of FIG. 7 which shows a part of a fan centering on the fan blade of the rotor which concerns on 1st Embodiment. It is a top view which shows the coil bracket of the rotor which concerns on 2nd Embodiment. It is a front view which shows the coil bracket of the rotor which concerns on 2nd Embodiment. It is a side view which shows the coil bracket of the rotor which concerns on 2nd Embodiment. It is a top view which shows the coil bracket of the rotor which concerns on 3rd Embodiment. It is a front view which shows the coil bracket of the rotor which concerns on 3rd Embodiment. It is a side view which shows the coil bracket of the rotor which concerns on 3rd Embodiment. FIG. 17 is a cross-sectional view taken along the line XVI-XVI of FIG. 17 showing a configuration of a rotor of a salient pole type rotary electric machine according to a fourth embodiment. FIG. 16 is a plan view taken along the line XVII-XVII of FIG. 16 showing a configuration of a rotor of a salient pole type rotary electric machine according to a fourth embodiment. It is a top view which shows the coil bracket of the rotor which concerns on 4th Embodiment. It is a front view which shows the coil bracket of the rotor which concerns on 4th Embodiment. It is a side view which shows the coil bracket of the rotor which concerns on 4th Embodiment.

Hereinafter, the salient pole type rotary electric machine and the rotor according to the present invention will be described with reference to the drawings. Here, parts that are the same as or similar to each other are designated by a common reference numeral, and duplicate description will be omitted.

[First Embodiment]
FIG. 1 is a vertical cross-sectional view showing the configuration of a salient pole type rotary electric machine according to the first embodiment. The salient pole type rotary electric machine 200 has a rotor 10, a stator 20, a bearing 30, a frame 40, and a bearing bracket 45.

The rotor 10 has a rotor shaft 11, a rotor core 12, a rotor winding 13, a fan 15, and a winding conductor holding structure 100 (FIG. 2). The rotor shaft 11 extends in the axial direction and is rotatably supported on both sides by two bearings 30. The rotor core 12 is attached to the outside of the rotor shaft 11 in the radial direction. A rotor winding 13 is wound around the rotor core 12, and normally, a rotating magnetic field is formed on the rotor 10 side. The rotor 10 will be described in detail later with reference to FIG. 2 and below.

The stator 20 has a stator core 21 and a stator winding 22. The stator core 21 is arranged on the radial outer side of the rotor core 12 via the gap 18, and has a cylindrical shape. The stator winding 22 penetrates through a plurality of stator slots (not shown) formed near the surface of the stator core 21 in the radial direction and extending in the axial direction at intervals from each other in the circumferential direction. ..

The frame 40 is arranged on the outer side in the radial direction of the stator 20, and houses the rotor core 12 and the stator 20. Both ends of the frame 40 in the axial direction are closed by bearing brackets 45. Each bearing 30 is fixedly supported by a bearing bracket 45.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 3 showing a configuration of a rotor of a salient pole type rotary electric machine according to the first embodiment. Further, FIG. 3 is a plan view taken along the line III-III of FIG. In the following description, it is assumed that each part constituting the rotor 10 is in an assembled state, and the configuration and the like will be described. At that time, the axial direction of the rotor 10 is referred to as the z direction, the radial direction of the rotor 10 is referred to as the r direction, and the circumferential direction of the rotor is referred to as the θ direction. Further, although there is no distinction between the upper and lower sides of each installation state, they are displayed as a plan view, a front view, and a side view in FIG. 3 and FIGS. 4 and below described later.

The rotor core 12 has, for example, a laminated structure in which electromagnetic steel sheets are laminated in the axial direction. Alternatively, in the case of a massive rotor, it is integrally formed.

The rotor 10 has two fans 15 provided on both sides of the rotor shaft 11 in the z direction with the rotor core 12 interposed therebetween. The fan 15 has a disk-shaped fan disk 15a coaxial with the rotor shaft 11 and a plurality of fan blades 15b attached to the outer surface of the fan disk 15a in the radial direction at equal intervals in the θ direction. The fan 15 sucks the cooling gas from the direction opposite to the rotor core 12 side, that is, from the bearing 30 side, and drives the cooling gas toward the rotor core 12 along the axial direction. The fan disk 15a and the fan blade 15b are formed so that the fan 15 functions as an axial fan. Further, the outer diameter of the fan disk 15a is formed so that the radial position of the fan blade 15b is in a range substantially corresponding to the radial range of the circumferential partition space 12b described later.

In the salient pole type rotary electric machine 200, the rotor iron core 12 is formed with a plurality of iron core salient pole portions 12a extending in the z direction at intervals in the θ direction. Each of the iron core salient poles 12a has a substantially rectangular parallelepiped shape. FIG. 2 shows a case where four iron core salient poles 12a are formed. The two iron core salient poles 12a adjacent to each other in the θ direction of the plurality of iron core salient poles 12a form a right-angled convex portion toward the center of the axis on the inner side in the r direction by sandwiching them. A circumferential partition space 12b is formed on the side surface and the outer side in the r direction, which has an arcuate cross section and is surrounded by a virtual curved surface extending in the axial direction. Four circumferential compartments 12b are formed at intervals in the circumferential direction.

Rotor winding conductors 13a are arranged along the axial direction on both sides of the iron core salient pole portion 12a in the circumferential direction. The plurality of rotor winding conductors 13a are coupled to each other on both outer sides of the rotor core 12 in the axial direction, or are coupled to an exciting circuit (not shown), a connecting electric wire to the exciting circuit, or the like. Here, each of the rotor winding conductors 13a may be a single conductor, or a plurality of conductors may be bundled in parallel. These are collectively referred to as one rotor winding conductor 13a.

The winding conductor holding structure 100 includes a pole head 105, a winding conductor side plate 110, a holding plate 115, a coil bracket 130, and a bolt 120.

Pole heads 105 are provided on the radial outer side of the iron core salient pole portion 12a, respectively. The pole head 105 is arranged so as to block the outside of the iron core salient pole portion 12a and the rotor winding conductors 13a arranged on both sides in the θ direction in the r direction. The pole head 105 is fixed to the rotor core 12 with bolts or the like (not shown) so as to resist the centrifugal force acting on the rotor winding conductor 13a in the radial direction.

The broken line arrow in FIG. 3 indicates the flow F1 or the flow F3 of the cooling gas as seen from the rotating rotor core 12. The flow of the cooling gas will be described after the description up to FIG. 6 is completed.

The winding conductor side plate 110 has a plate shape slightly longer in the axial direction than the coil bracket 130 described later, and is bent at the center in the width direction. When there are four iron core salient poles 12a, the bending angle is 90 degrees as shown in FIG. When there are five or more iron core salient poles 12a, the bending angle is less than 90 degrees, that is, an acute angle. The winding conductor side plate 110 is formed by bending each of the two surfaces on the opposite sides of the two rotor winding conductors 13a arranged in the same circumferential partition space 12b. It is arranged along the outside of the side surface in the θ direction.

The diameters of the winding conductor side plates 110 are respectively provided by bolts 120 which are arranged at intervals in the axial direction and are screwed into screw holes 11b formed in the rotor shaft 11 and fixed to the rotor shaft 11. Movement to the outside of the direction is restricted. The bolt 120 indirectly restrains the winding conductor side plate 110 via the coil bracket 130.

The plurality of coil brackets 130 are arranged at intervals in the axial direction in each of the circumferential partition spaces 12b. Each coil bracket 130 is provided on the radial outer side of the winding conductor side plate 110, and is tightened toward the rotor shaft 11 by bolts 120. As a result, the winding conductor side plate 110 tightens the rotor winding conductor 13a toward the rotor shaft 11, and the component of this tightening force in the direction perpendicular to the side of the rotor winding conductor 13a rotates. The child winding conductor 13a is pressed against the iron core salient pole portion 12a.

Each coil bracket 130 is formed with two ventilation holes 135 penetrating in the axial direction. The details of the coil bracket 130 will be described with reference to FIGS. 4 to 6.

The winding conductor side plate 110 uses an insulating material so as to have an insulating function.

Originally, the rotor winding conductor 13a itself has rigidity, and the load due to the centrifugal force is carried by the coil bracket 130 and the bolt 120, so that it can be used as a structural member of the winding conductor side plate 110. No functionality is required.

FIG. 4 is a plan view showing a coil bracket of the rotor according to the first embodiment. FIG. 5 is a front view. Further, FIG. 6 is a side view.

The coil bracket 130 is integrally formed and has holding blades 133 arranged on both sides of the central portion 131 and the central portion 131 in the θ direction, respectively. The coil bracket 130 has a cross-sectional shape close to an isosceles triangle as a whole, and the winding conductor side plate 110 is located at a portion of the central portion 131 and two holding blades 133 facing the winding conductor side plate 110. It has a pressing surface 134 formed so as to be in close contact with the. Therefore, the central portion 131 faces the bent portion of the winding conductor side plate 110 so as to be in close contact with the bent portion.

Two bolt holes 132 penetrating in the r direction are formed side by side in the z direction in the central portion 131 of the coil bracket 130. The holding blade 133 projects in the θ direction from a portion of the central portion 131 excluding both ends in the z direction. The holding blade 133 has a substantially triangular cross-sectional shape. As a cooling gas axial flow passage 180 for allowing the cooling gas to pass in the z direction through the portion where the coil bracket 130 is arranged, a ventilation hole 135 penetrating in the z direction is formed in each holding blade 133. Has been done. FIG. 5 shows an example in which the cross section of the ventilation hole 135 is triangular, but the present invention is not limited to this. For example, it may be another polygonal or elliptical shape. Alternatively, a plurality of small holes may be formed in order to allow a margin in rigidity.

FIG. 7 is a partial plan view showing a part of the fan centered on the fan blade of the rotor according to the first embodiment, FIG. 8 is a front view of the VIII-VIII arrow portion of FIG. 7, and FIG. 9 is. , Is a side view of the IX-IX arrow-viewing portion of FIG.

The fan blade 15b is attached to the fan disk 15a by welding or brazing.

The operation of the rotor 10 according to the present embodiment will be described with reference to FIG. According to the rotation of the rotor 10, the fan 15 drives the cooling gas on the opposite side of the rotor core 12 in the axial direction so as to flow along the axial direction toward the rotor core 12.

Since the fan 15 and the rotor core 12 are rotating at the same peripheral speed, and the radial range in which the fan 15 is arranged is substantially equal to the radial range of the circumferential partition space 12b. These positions have similar peripheral speeds to each other. That is, the difference in the velocity component in the circumferential direction is relatively zero between the fan 15 and the circumferential partition space 12b. As a result, when the flow F1 of the cooling gas from the fan blade 15b toward the circumferential partition space 12b is a flow along the axial direction, the centrifugal force in the r direction acts even in the circumferential partition space 12b. However, the flow F2 is substantially in the axial direction.

The cooling gas traveling along the flow F2 reaches the coil bracket 130, passes through the ventilation hole 135 which is a flow path formed in the axial direction, and flows along the axial flow F3 in the circumferential partition space 12b. Proceed toward the central position in the axial direction. Similarly, the cooling gas that has flowed into the circumferential partition space 12b from the opposite side in the axial direction also advances toward the axial center position of the circumferential partition space 12b. The cooling gases traveling from both sides toward the axial center position of the circumferential partition space 12b collide with each other and flow out from the circumferential partition space 12b radially outward along the flow toward the radial outer side. ..

In this way, the cooling gas that has flowed into the circumferential partition space 12b flows in the entire axial range of the circumferential partition space 12b.

Since the conventional coil bracket does not have an axial flow path, the cooling gas that has flowed into the circumferential partition space from the outside of the rotor core in the axial direction flows inward of the coil bracket in the axial direction. Instead, it will flow out from the circumferential partition space to the outside in the radial direction.

The heat generated in the rotor winding conductor 13a is transferred to the pole head 105 side on the radial outer side of the rotor winding conductor 13a by heat conduction, and is transferred from the surface of the pole head 105 to the cooling gas, and the rotor winding is performed. It also moves from the side of the wire conductor 13a to the winding conductor side plate 110 side, and moves from the surface to the cooling gas.

In the rotor according to the present embodiment, since the cooling gas flows over the entire axial region of the circumferential partition space 12b, the rotor winding conductor 13a can be cooled more reliably.

[Second Embodiment]
10 is a plan view showing the coil bracket of the rotor according to the second embodiment, FIG. 11 is a front view, and FIG. 12 is a side view.

The rotor 10 according to the second embodiment has a coil bracket 140 instead of the coil bracket 130 in the first embodiment. Other than that, it is the same as that of the first embodiment.

The coil bracket 140 is integrally formed and has holding blades 143 arranged on both sides of the central portion 141 and the central portion 141 in the θ direction, respectively. The coil bracket 140 has a holding surface 144 formed so as to be in close contact with the winding conductor side plate 110 at a portion of the central portion 141 and two holding blades 143 facing the winding conductor side plate 110.

Two bolt holes 142 penetrating in the r direction are formed side by side in the z direction in the central portion 141. The holding wing 143 projects in the θ direction from a portion of the central portion 141 excluding both ends in the z direction. The holding wing 143 has a substantially rectangular flat plate shape.

As a cooling gas axial flow passage 180 for the cooling gas to pass in the z direction through the portion where the coil bracket 140 is arranged, the central portion 141 and the two holding blades 143 are combined with each other to form a stator. An open space 145 is formed between the inner and inner sides of the iron core 21 in the radial direction.

In the case of the coil bracket 140 in the rotor 10 according to the present embodiment, it is possible to secure a large axial flow path cross-sectional area of the open space 145 as the cooling gas axial flow passage 180.

[Third Embodiment]
13 is a plan view showing the coil bracket of the rotor according to the third embodiment, FIG. 14 is a front view, and FIG. 15 is a side view. This embodiment is a modification of the second embodiment. In the rotor 10 according to the third embodiment, a reinforcing member 146 is further provided on the coil bracket 140 of the rotor 10 according to the second embodiment. The reinforcing member 146 may be, for example, a round bar as shown in FIG. 13 or the like, or a square bar.

The centrifugal forces acting on the two rotor winding conductors 13a in the same circumferential partition space 12b each have a circumferential component toward the coil bracket 140. Since these circumferential components act to sandwich the coil bracket 140 from both sides in the circumferential direction, the reinforcing member 146 is provided when this force is large.

In the case of the coil bracket 140 in the rotor 10 according to the present embodiment, the rigidity of the coil bracket 140 can be improved by providing the reinforcing member 146. Alternatively, by providing the reinforcing member 146, the holding blade 143 can be further thinned, and the axial flow path cross-sectional area of the open space 145 as the cooling gas axial flow passage 180 can be further secured. ..

[Fourth Embodiment]
FIG. 16 is a cross-sectional view taken along the line XVI-XVI of FIG. 17 showing the configuration of the rotor of the salient pole type rotary electric machine according to the fourth embodiment. Further, FIG. 17 is a plan view taken along the line XVII-XVII of FIG.

The fourth embodiment is a modification of the second embodiment. The coil bracket 150 in the fourth embodiment has an intermediate blade 151 and a mounting portion 152 thereof. In other respects, it is similar to the second embodiment.

FIG. 18 is a plan view showing the coil bracket of the rotor according to the fourth embodiment, FIG. 19 is a front view, and FIG. 20 is a side view.

The fourth embodiment is a modification of the second embodiment. In addition to the configuration of the second embodiment, the coil bracket 150 in the fourth embodiment further comprises an intermediate blade 151. The intermediate blade 151 is attached to the flat surface of the central portion 141 facing the open space 145 via the attachment portion 152. The intermediate blade 151 may be directly attached to the central portion 141 without having the attachment portion 152.

The width of the mounting portion 152 in the θ direction is within the dimension of the width of the flat surface of the central portion 141 of the coil bracket 150 in the θ direction.

The intermediate blade 151 in the coil bracket 150 configured in this way can be attached at the same time when the winding conductor holding structure 100 is attached. Alternatively, the intermediate blade 151 can be assembled with the intermediate blade 151 already attached to the coil bracket 150 or integrally formed.

By attaching the coil bracket 150, it becomes a resistance to the flow of the cooling gas in the axial direction. By providing an intermediate blade 151 having a size that fits inside the radial outer surface of the rotor 10 in the middle of the open space 145 as the cooling gas axial flow passage 180, the cooling is performed at the mounting position of the coil bracket 150. The axial flow of gas can be accelerated. As a result, the cooling performance of the rotor winding conductor can be further improved.

[Other Embodiments]
Although the embodiments of the present invention have been described above, the embodiments are presented as examples and are not intended to limit the scope of the invention.

Moreover, you may combine the features of each embodiment.

Further, the embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. The embodiments and variations thereof are included in the scope of the invention described in the claims and the equivalent scope thereof, as are included in the scope and gist of the invention.

10 ... Rotor, 11 ... Rotor shaft, 11b ... Screw hole, 12 ... Rotor core, 12a ... Iron core salient pole, 12b ... Circumferential partition space, 13 ... Rotor winding, 13a ... Rotor winding conductor, 15 ... fan, 15a ... fan disk, 15b ... fan blade, 18 ... void, 20 ... stator, 21 ... stator core, 22 ... stator winding, 30 ... bearing, 40 ... frame, 45 ... bearing bracket, 100 ... Winding conductor holding structure, 105 ... Pole head, 110 ... Winding conductor side plate, 115 ... Holding plate, 120, 121 ... Bolt, 130 ... Coil bracket, 131 ... Central part, 132 ... Bolt hole, 133 ... Holding Wings, 134 ... Holding surface, 135 ... Ventilation hole, 140 ... Coil bracket, 141 ... Central part, 142 ... Bolt hole, 143 ... Holding wing, 144 ... Holding surface, 145 ... Open space, 146 ... Reinforcing member, 150 ... Coil Bracket, 151 ... Intermediate blade, 152 ... Mounting part, 180 ... Cooling gas axial flow path, 200 ... Pole pole type rotary electric machine

Claims (8)

A rotor shaft that extends in the axial direction and is rotatably supported, and a plurality of iron core salient poles that are attached to the radial outer side of the rotor shaft and are arranged at intervals in the circumferential direction and extend in the axial direction are formed. A rotor having a rotor core, a rotor winding having a rotor winding conductor wound around the rotor core, and a winding conductor holding structure for holding the rotor winding conductor. ,
A stator having a stator core provided so as to surround the rotor core on the radial outer side of the rotor core, and a stator winding penetrating the inside of the stator core in the axial direction.
Two bearings that rotatably support the rotor shaft on both sides of the rotor shaft in the axial direction with the rotor core interposed therebetween.
It is a salient pole type rotary electric machine equipped with
The winding conductor holding structure is
A plurality of pole heads arranged on the radial outer side of the rotor winding conductor arranged on each of the plurality of iron core salient poles and on both sides in the circumferential direction to resist centrifugal force in the radial direction, and
The two rotor winding conductors arranged in the circumferential partition space sandwiched between the plurality of iron core salient poles adjacent to each other on the outside of the opposite side surfaces of the rotor winding conductors are spaced apart from each other in the axial direction. Multiple coil brackets arranged and
A plurality of bolts for fixing the coil bracket to the rotor core,
Equipped with
The coil bracket is formed with a cooling gas axial flow path that allows the cooling gas to pass in the axial direction.
The rotor, wherein on both sides of the axial direction with respect to the rotor core arranged in the rotor shaft, along the axial direction have a two fan driving the cooling gas to the rotor core ,
A plurality of the same number of each other between one of the two fans and the axial center position of the circumferential partition space and between the other of the two fans and the center position. The coil bracket is arranged,
The coil bracket is not arranged at the center position, and the coil bracket is not arranged.
The cooling gas driven by the two fans travels from both sides in the axial direction toward the center position with respect to the center position, collides with each other at the center position, and has a diameter from the circumferential partition space. A salient pole type rotary electric machine characterized in that it flows out in the direction. The coil bracket
A central portion in which bolt holes of the bolts are formed, which are arranged in the center of the circumferential partition space in the circumferential direction, and
Two holding blades, which are portions in the circumferential direction extending from the central portion on both sides in the circumferential direction and corresponding to each of the rotor winding conductors facing each other.
Have,
The salient pole type rotary electric machine according to claim 1, wherein each of the two holding blades is formed with a ventilation hole as a cooling gas axial flow passage. The coil bracket
The central portion where the bolt holes of the bolts arranged in the center of the circumferential partition space in the circumferential direction are formed, and
Two holding blades extending from the central portion to both sides in the circumferential direction so as to correspond to each of the rotor winding conductors adjacent to each other, and a portion in the circumferential direction.
Have,
The central portion and the two holding blades are combined with each other to form an open space as a cooling gas axial flow passage between the stator core and the inside in the radial direction. The salient pole type rotary electric machine according to claim 1. The salient pole type rotary electric machine according to claim 3, wherein the coil bracket further has an intermediate blade provided in the central portion. The salient pole type rotary electric machine according to claim 3 or 4, wherein the coil bracket further includes a reinforcing member for connecting the two holding blades to each other. Claims 1 to 2, wherein the fan is an axial flow fan and has a fan disk attached to the rotor shaft and a plurality of fan blades attached to the radial outer side of the fan disk. The salient pole type rotary electric machine according to any one of 5. The rotor so as to surround the side surfaces of the rotor winding conductors adjacent to each other on opposite sides in each circumferential partition space sandwiched between the plurality of iron core salient poles adjacent to each other. The salient pole type rotary electric machine according to any one of claims 1 to 6, further comprising a winding conductor side plate extending in the direction and arranged inside the coil bracket in the radial direction. It is a rotor of a salient pole type rotary electric machine,
A rotor shaft that extends axially and is rotatably supported,
A rotor core mounted on the radial outer side of the rotor shaft and formed with a plurality of core salient poles extending in the axial direction at intervals in the circumferential direction.
The rotor winding wound around the rotor core and
Two fans arranged on the rotor shaft on both sides in the axial direction with respect to the rotor core and driving a cooling gas toward the rotor core along the axial direction.
Equipped with
The rotor winding is
Rotor winding conductors wound around each of the plurality of iron core salient poles,
The plurality of iron core salient poles are arranged so as to surround the two radial outer sides of the rotor winding conductors adjacent to each other in each circumferential partition space sandwiched between the plurality of iron core salient poles and extend in the axial direction. Winding conductor side plate and
They are arranged at intervals in the axial direction of the circumferential partition space, have a width corresponding to the width of the winding conductor side plate, and are provided in close contact with the winding conductor side plate. With multiple coil brackets
A plurality of bolts for fixing the coil bracket to the rotor core,
Equipped with
The coil bracket is formed so that the cooling gas in the axial direction can pass through .
A plurality of the same number of each other between one of the two fans and the axial center position of the circumferential partition space and between the other of the two fans and the center position. The coil bracket is arranged,
The coil bracket is not arranged at the center position, and the coil bracket is not arranged.
The cooling gas driven by the two fans travels from both sides in the axial direction toward the center position with respect to the center position, collides with each other at the center position, and has a diameter from the circumferential partition space. A rotor characterized by flowing out in the direction.

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