JP7011616B2 - Synchronous rotary electric machine - Google Patents

Description

The present invention relates to a synchronous rotary electric machine.

In a synchronous rotary electric machine, an armature winding is usually provided on the stator side, and a rotating magnetic field is formed on the rotor side. As a configuration for forming a rotating magnetic field, there are cases where a field winding is provided in the rotor and cases where a permanent magnet is provided. That is, for example, in a synchronous generator, there is a method of providing a field winding when field adjustment is required for adjustment of advance / lag. Alternatively, when field adjustment is not required, there is a method of using a permanent magnet instead of using a winding.

Japanese Patent No. 5785521

In the case of a synchronous rotary electric machine, a field may be formed from the rotor side, and it is necessary to efficiently cool the rotor. Therefore, for example, in a salient pole-shaped rotor, a plurality of flow paths penetrating from the inside to the outside in the radial direction are formed at intervals in the axial direction between the salient poles adjacent to each other to cool the rotor. There is an example of securing a passage (see Patent Document 1).

However, these channels cross the magnetic path through which the magnetic field lines of the field were supposed to pass, thus narrowing the magnetic path. This causes the occurrence of magnetic saturation locally. In order to prevent this, it was necessary to increase the size of the structure that becomes the magnetic path of the field magnet.

Therefore, an object of the present invention is to suppress magnetic saturation in a synchronous rotary electric machine while ensuring a cooling function of the rotor.

In order to achieve the above object, the synchronous rotary electric machine according to the present invention has a rotor shaft extending in the direction of the rotation axis, a rotor having a rotor magnetic path portion attached to the rotor shaft, and the rotor. It is provided with a stator having an opposing stator magnetic path portion, a frame arranged radially outside so as to surround the stator, and a bearing that rotatably supports the rotor at two locations. At least one of the rotor and the stator has a magnetic force generating portion, and at least one of the rotor magnetic path portion and the stator magnetic path portion is plate-shaped and has a plurality of penetrating portions in the thickness direction thereof. It has at least one group having cooling paths in a magnetic field, and in the one group, the plurality of cooling paths in a magnetic field are arranged in a row in one direction on one surface, and the rows arranged in the same row. Cooling in a plurality of magnetic fields arranged in one direction in a predetermined plurality of directions selected from a direction along a plane perpendicular to the one surface including the center line of the above surface and directions opposite to each other across the surface. The magnetic cooling paths adjacent to each other among the paths are formed so as to penetrate in the same direction or different directions from each other.

According to the present invention, in a synchronous rotary electric machine, magnetic saturation can be suppressed while ensuring a cooling function of the rotor.

It is a vertical sectional view which shows the structure of the synchronous rotary electric machine which concerns on 1st Embodiment. FIG. 3 is a partial vertical cross-sectional view taken along the line II-II in FIG. 3 showing a configuration of a rotor of a synchronous rotary electric machine according to a first embodiment. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 2 showing a configuration of a rotor of a synchronous rotary electric machine according to a first embodiment. FIG. 2 is a cross-sectional view of a portion taken along the line IV-IV of FIG. 2, showing a configuration of a rotor of a synchronous rotary electric machine according to a first embodiment. FIG. 2 is a cross-sectional view of a portion taken along the line VV of FIG. 2 showing a configuration of a rotor of a synchronous rotary electric machine according to a first embodiment. It is a development view in the circumferential direction which saw the rotor body part of the rotor of the synchronous rotary electric machine which concerns on 1st Embodiment from the outside in the radial direction. It is a development view in the circumferential direction which saw the rotor body part of the rotor of the synchronous rotary electric machine which concerns on 1st Embodiment from the inside in the radial direction. It is a partial cross-sectional view which shows the rotor body part by the 1st modification of the rotor of the synchronous rotary electric machine which concerns on 1st Embodiment. It is a development view in the circumferential direction which saw the rotor body part in the radial direction by 1st modification of the rotor of the synchronous rotary electric machine which concerns on 1st Embodiment. It is a partial cross-sectional view which shows the rotor body part by the 2nd modification of the rotor of the synchronous rotary electric machine which concerns on 1st Embodiment. It is a development view in the circumferential direction which saw the rotor body part in the radial direction by the 2nd modification of the rotor of the synchronous rotary electric machine which concerns on 1st Embodiment. It is a partial cross-sectional view for demonstrating the operation of the rotor of the synchronous rotary electric machine which concerns on 1st Embodiment. It is a cross-sectional view of the XIII-XIII line arrow portion of FIG. 12 for explaining the operation of the rotor of the synchronous rotary electric machine according to the first embodiment. FIG. 16 is a vertical cross-sectional view taken along the line XIV-XIV of FIG. 16 showing a configuration of a synchronous rotary electric machine according to a second embodiment. 16 is a vertical cross-sectional view taken along the line XV-XV of FIG. 16 showing a configuration of a synchronous rotary electric machine according to a second embodiment. FIG. 14 is a cross-sectional view taken along the line of XVI-XVI showing the configuration of the synchronous rotary electric machine according to the second embodiment. FIG. 14 is a cross-sectional view taken along the line of XVII-XVII showing the configuration of the synchronous rotary electric machine according to the second embodiment.

Hereinafter, the synchronous rotary electric machine and the rotor according to the embodiment of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a vertical cross-sectional view showing the configuration of a synchronous rotary electric machine according to the first embodiment. The synchronous rotary electric machine 100 has a rotor 110, a stator 120, a frame 130, two bearings 32, and a cooler 140.

The rotor 110 has a cylindrical shape as a rotor shaft 11 extending in the rotation axis direction (hereinafter, also referred to as an axial direction) and a rotor magnetic path portion 13 on the rotor 110 side attached to the radial outer side of the rotor shaft 11. It has a rotor body portion 112 of the above, and a plurality of magnetic poles 117 as a magnetic force generating unit 15 on the rotor 110 side supported by the rotor body portion 112. The rotor shaft 11 is rotatably supported by bearings 32 on both sides of the rotor body 112 in the axial direction.

An inner fan 119 is attached to the rotor shaft 11 between the rotor body 112 and each of the bearings 32, and rotates with the rotation of the rotor shaft 11. The inner fan 119 sucks in the cooling gas on the bearing 32 side and pushes it out to the rotor body 112 and the stator 120 side.

The stator 120 includes a cylindrical stator core 121 as a stator magnetic path portion 14 arranged radially outside the magnetic pole 117 via a gap 116, and a plurality of stator windings penetrating the inside of the stator core 121. It has a wire 122 and.

The frame 130 is arranged radially outside the rotor body 112, the magnetic pole 117, and the stator 120 so as to surround them. Bearing brackets 34 are attached to both ends of the frame 130 in the axial direction. Each of the bearing brackets 34 statically supports the bearing 32.

The cooler 140 has, for example, a cooling pipe 141 through which a cooling medium such as outside air or water flows in the pipe, and a cooler cover 142 for accommodating the cooling pipe 141, such as air for cooling the rotor 110 and the stator 120. Cool the cooling gas.

The space in the frame 130 and the space in the cooler cover 142 communicate with each other through a cooler inlet opening 143 and two cooler outlet openings 144. The cooler inlet opening 143 is formed above the stator 120. Further, the two cooler outlet openings 144 are formed on both sides in the axial direction with the cooler inlet opening 143 interposed therebetween.

The frame 130, the bearing bracket 34, and the cooler cover 142 together form one enclosed space as a whole.

FIG. 2 is a partial vertical cross-sectional view taken along the line II-II in FIG. 3 showing the configuration of the rotor of the synchronous rotary electric machine according to the first embodiment, and FIG. 3 is a line III-III in FIG. It is a cross-sectional view of the arrow.

In the rotor 110, the rotor body portion 112 as the rotor magnetic path portion 13 on the rotor 110 side is supported at both ends in the axial direction by a disk-shaped body support plate 115 from the inside in the radial direction.

Each body support plate 115 has a perforated disk shape, the inside in the radial direction is fixed to the rotor shaft 11, and the outside in the radial direction is connected to the rotor body 112. In the body support plate 115, a plurality of circular support plate openings 115a are formed at intervals in the circumferential direction in addition to the portion through which the rotor shaft 11 penetrates. The shape of the support plate opening 115a is not limited to a circle, and may be, for example, an ellipse or a polygon. Further, FIG. 2 shows an example in which the rotor body 112 is attached to the rotor shaft 11 via two body support plates 115, but the present invention is not limited to this. For example, it may be attached to the rotor shaft 11 via one body support plate 115 near the center of the rotor body 112 in the axial direction.

A plurality of magnetic poles 117 as the magnetic force generating portion 15 are attached to the radial surface of the rotor body portion 112 as the rotor magnetic path portion 13. Each magnetic pole 117 has a permanent magnet 117b that is substantially rectangular parallelepiped and extends axially, and a magnet support portion 117a that is attached to the radial surface of the rotor body portion 112 and supports the permanent magnet 117b. These plurality of magnetic poles 117 are arranged at intervals in the circumferential direction. Although the case where the magnetic pole 117 has the permanent magnet 117b is shown as an example, the present invention is not limited to this. That is, the magnetic pole 117 may be an electromagnet having a field winding.

FIG. 4 is a cross-sectional view of the IV-IV line arrow section of FIG. 2 showing the configuration of the rotor of the synchronous rotary electric machine according to the first embodiment, and FIG. 5 is a cross section of the VV line arrow view portion of FIG. It is a top view. Further, FIG. 6 is a development view of the rotor body of the rotor of the synchronous rotary electric machine according to the first embodiment in the circumferential direction when viewed from the outside in the radial direction, and FIG. 7 is a development view of the rotor body in the radial direction. It is a development view in the circumferential direction seen from.

4 to 7 show details of the body vent hole 113 as the cooling path 17 in the magnetic field formed in the rotor body 112 as the rotor magnetic path 13.

As shown in FIG. 6, which is a development view of the rotor body 112 in the circumferential direction when viewed from the outside in the radial direction, the body vent holes 113 are sandwiched between magnetic poles 117 adjacent to each other and spread in the axial direction. On the outer surface of the body portion 112 in the radial direction, they are arranged so as to be arranged in a line in the axial direction. These shall be called one group. Each group is arranged in a region sandwiched between all adjacent magnetic poles 117. Therefore, the rotor body 112 is formed with as many groups as the number of magnetic poles 117 as a whole, but the group is not limited to this. For example, every other one may be formed. Alternatively, two rows may be formed in each group.

As shown in FIGS. 4 and 5, which are cross sections perpendicular to the axial direction, the body vent holes 113 are formed along a plane perpendicular to the axial direction, respectively. However, the direction in which each of the body vent holes 113 penetrates inward in the radial direction is not the direction of the center axis of rotation, that is, the direction perpendicular to the surface of the rotor body 112.

That is, assuming that the clockwise direction in FIG. 4 is the positive direction in the Θ direction, the first vent hole 113a is negative in the Θ direction from the radial outer side to the radial inner direction from the rotation center axis direction. It is formed in a direction inclined in the direction of. Further, as shown in FIG. 5, the second ventilation hole 113b adjacent to the first ventilation hole 113a in the axial direction is from the outside in the radial direction to the inside in the radial direction, in the positive direction in the Θ direction from the rotation center axis direction. It is formed in a tilted direction.

As a result, as shown in FIG. 7, which is a development view of the rotor body 112 in the circumferential direction when viewed from the inside in the radial direction, the body vent hole 113 is provided on the surface of the rotor body 112 in the radial direction. It is formed so that the distance between them is wider than that of the outer surface in the radial direction.

4 to 7 show an example in which the body vent hole 113 as the cooling path 17 in the magnetic field has two types of the first vent hole 113a and the second vent hole 113b, but the present invention is not limited to this. For example, in addition to the above-mentioned first ventilation holes 113a and second ventilation holes 113b, a third ventilation hole may be formed in a direction perpendicular to the surface of the rotor body 112, and three types of ventilation holes may be arranged in order. A modified example will be described below.

FIG. 8 is a partial cross-sectional view showing the rotor body portion according to the first modification, and FIG. 9 is a development view of the rotor body portion in the circumferential direction when viewed from the inside in the radial direction.

In the first modification, the body vent hole 113 as the cooling path 17 in the magnetic field has a first vent hole 113c, a second vent hole 113d, and a third vent hole 113e. The first ventilation hole 113c, the second ventilation hole 113d, and the third ventilation hole 113e are arranged in this order in the repeating axial direction. The second ventilation hole 113d is formed along the radial direction. The first vent hole 113c and the third vent hole 113e are inclined in opposite directions with respect to each other in the circumferential direction.

FIG. 10 is a partial cross-sectional view showing the rotor body portion according to the second modification, and FIG. 11 is a development view of the rotor body portion in the circumferential direction when viewed from the inside in the radial direction.

In the second modification, the body vent hole 113 as the cooling passage 17 in the magnetic field has a first vent hole 113f, a second vent hole 113g, a third vent hole 113h, and a second vent hole 113j. The first ventilation hole 113f, the second ventilation hole 113g, the third ventilation hole 113h, and the fourth ventilation hole 113j are arranged in this order in the repeating axial direction. The second ventilation hole 113g and the third ventilation hole 113h are inclined in opposite directions with respect to each other in the circumferential direction. Further, the first vent hole 113f and the fourth vent hole 113j are inclined in opposite directions in the circumferential direction with a larger inclination.

In the present embodiment and the first and second modifications described above, examples are shown in which vent holes having different inclinations in the circumferential direction are arranged sequentially in the axial direction, but the present invention is not limited to this. For example, each of them may be arranged side by side instead of one. Alternatively, there may be a case where a plurality of objects in a specific direction are lined up. Alternatively, the arrangement may be different for each region in the axial direction. Further, the arrangement may be different from each other in the circumferential direction.

That is, the above can be summarized as follows. That is, in one group, the body vent holes 113 as the plurality of cooling paths 17 in the magnetic field are arranged in a row in the axial direction on one surface. Further, a plurality of predetermined directions are selected from the directions along the plane perpendicular to the surface of the row and the directions opposite to each other across the plane, including the center line of the rows arranged in this row. Of the plurality of body vents 113 arranged in this one direction, the body vents 113 adjacent to each other are formed so as to penetrate in the same direction or different directions from each other.

In the above, the case where each body vent hole 113 extends linearly is shown, but the present invention is not limited to this. That is, it may be formed in a curved shape.

FIG. 12 is a partial cross-sectional view for explaining the operation of the rotor of the synchronous rotary electric machine according to the first embodiment, and FIG. 13 is a partial cross-sectional view taken along the line XIII-XIII of FIG. It is a figure which see through the 1st vent hole 113a and the 2nd vent hole 113b in the axial direction in the cross section of the rotor body part 112.

A plurality of magnetic force lines M passing between the magnetic force generating portions 15 adjacent to each other, that is, the permanent magnets 117b of the magnetic poles 117 are shown by thick broken lines. Each magnetic force line M exits from the permanent magnet 117b and passes through the magnet support portion 117a and the rotor body portion 112 as the rotor magnetic path portion 13.

As shown in FIGS. 12 and 13, the rotor body portion 112 as the rotor magnetic path portion 13 of the rotor 110 according to the present embodiment has a body passage as a cooling path 17 in a magnetic field that obstructs the distribution of magnetic field lines M. The pores 113, specifically, the first ventilation holes 113a and the second ventilation holes 113b are scattered without being concentrated in a specific place. As a result, magnetic saturation can be suppressed while ensuring the cooling function of the rotor.

[Second Embodiment]
14 is a vertical cross-sectional view taken along the line XIV-XIV of FIG. 16 showing the configuration of the synchronous rotary electric machine according to the second embodiment, FIG. 15 is a vertical cross-sectional view taken along the line XV-XV of FIG. 16, and FIG. 14 is a cross-sectional view taken along the line XVI-XVI, and FIG. 17 is a cross-sectional view taken along the line XVII-XVII showing the configuration of the synchronous rotary electric machine according to the second embodiment.

The second embodiment is a modification of the first embodiment. The synchronous rotary electric machine 200 in the second embodiment has a rotor 210, a stator 220, a frame 230, a bearing 32, and a bearing bracket 34. The synchronous rotary electric machine 200 according to the present embodiment may be a vertical type in which the rotor shaft 11 extends in the vertical direction. Alternatively, the rotor shaft 11 may be horizontally installed so as to extend in the horizontal direction.

In the second embodiment, the ventilation passage 231 is formed in the frame 230, and the cooling gas is sent to the flow path and the rotor 210 formed in the stator 220 described below by the inner fan 232. After passing through the formed flow path, a circular flow path is formed in which the air passage 231a flows into the air passage 231 and the air passage outlet 231b again flows into the inner fan 232.

The rotor 210 includes a rotor shaft 11, a disc-shaped rotor core 212 attached to the rotor shaft 11, and a plurality of radially extending permanent magnets arranged at intervals in the circumferential direction. Has 213. An electromagnet may be used instead of the permanent magnet.

The rotor core 212 is formed with a plurality of rotor vents 214 penetrating in the thickness direction at intervals in the circumferential direction between the attachment portion to the rotor shaft 11 in the radial direction and the permanent magnet 213. A flow path through which the cooling gas passes through the rotor 210 in the axial direction is secured.

The stator 220 includes two disc-shaped stator cores 221 as stator magnetic path portions 14 that sandwich the rotor core 212 on both sides in the axial direction, and a stator winding 223 arranged on each stator core 221. Has.

Each stator core 221 has a perforated disk shape having an opening 212a having a gap with the radial outer surface of the rotor shaft 11 through which the rotor shaft 11 penetrates in the center. On the surface of each stator core 221 on the side facing the rotor core 212, a plurality of stator teeth 222 arranged at intervals in the circumferential direction are formed. The shape of each stator teeth 222 projected in the axial direction is substantially trapezoidal, and the upper side is radially inside and the lower side is radially outside. It also has a thickness in the axial direction.

The stator winding 223 is wound around the stator teeth 222. The stator teeth 222 and the stator winding 223 form a magnetic force generation unit 15.

In the region between the stator teeth 222 adjacent to each other of the stator core 221, a plurality of stator ventilation holes 224 as cooling passages 17 in a magnetic field are formed.

On the surface of the stator core 221 on the side where the stator teeth 222 is formed, that is, on the surface of the side facing the rotor core 212, as shown in FIG. 16, the stator passage as the cooling path 17 in the magnetic field is performed. The pores 224 are arranged so as to line up in a radial direction in a region sandwiched between the stator teeth 222 adjacent to each other and extending in the radial direction. These shall be called one group. Each group is arranged in the area sandwiched between all the stator teeth 222 adjacent to each other. Therefore, the rotor body 112 is formed with as many groups as the number of stator teeth 222 as a whole, but the group is not limited to this. For example, every other one may be formed. Alternatively, two rows may be formed in each group.

Assuming a plane along the center of the stator vents 224 on the surface facing the rotor core 212, including the axis of rotation, the stator vents in each group, as shown in FIGS. 16 and 17. The 224s alternate radially and penetrate the plane in opposite directions. This state is the same as that of the first embodiment, and produces the same effect as that of the first embodiment.

In the second embodiment, the case where the rotor side is the field side having a permanent magnet and the stator side is the armature side having an armature winding is shown as an example, but the present invention is not limited to this. For example, the armature side having the armature winding is the rotor side, that is, the rotor winding as the armature winding is wound around the rotor teeth, and the field side is the stator side, and they are adjacent to each other. The same configuration may be used for each group of ventilation holes in the region sandwiched between the armature windings.

[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. For example, in the embodiment, the case of a horizontal synchronous rotary electric machine in which the rotor shaft extends in the horizontal direction is shown as an example, but the present invention is not limited to this. For example, it may be the case of a vertical synchronous rotary electric machine.

Furthermore, these embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These 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.

11 ... rotor shaft, 13 ... rotor magnetic path, 14 ... stator magnetic path, 15 ... magnetic force generating section, 17 ... cooling path in magnetic field, 32 ... bearing, 34 ... bearing bracket, 100 ... synchronous rotary electric machine, 110 ... Rotor, 112 ... Rotor body, 113 ... Body vent (cooling path in magnetic field), 113a ... First vent, 113b ... Second vent, 113c ... First vent, 113d ... Second Pore, 113e ... 3rd vent, 113f ... 1st vent, 113g ... 2nd vent, 113h ... 3rd vent, 113j ... 4th vent, 115 ... Body support plate, 115a ... Support plate opening, 116 ... void, 117 ... magnetic pole, 117a ... magnet support, 117b ... permanent magnet, 119 ... internal fan, 120 ... stator, 121 ... stator core, 122 ... stator winding, 130 ... frame, 140 ... cooler , 141 ... cooling pipe, 142 ... cooler cover, 143 ... cooler inlet opening, 144 ... cooler outlet opening, 200 ... synchronous rotor, 210 ... rotor, 212 ... rotor core, 212a ... gap, 213 ... permanent Magnet, 214 ... rotor vent, 220 ... stator, 221 ... stator core, 222 ... stator teeth, 223 ... stator winding, 224 ... stator vent (cooling path in magnetic field), 230 ... frame, 231 ... Ventilation path, 231a ... Ventilation path entrance, 231b ... Ventilation path exit, 232 ... Inner fan

Claims (8)

A rotor having a rotor shaft extending in the direction of the rotation axis and a rotor magnetic path portion attached to the rotor shaft,
A stator having a stator magnetic path portion facing the rotor, and a stator,
A frame arranged radially outside so as to surround the stator, and
A bearing that rotatably supports the rotor at two locations,
Equipped with
At least one of the rotor and the stator has a magnetic force generator.
At least one of the rotor magnetic path portion and the stator magnetic path portion is plate-shaped and has at least one group having a plurality of cooling paths in a magnetic field penetrating in the thickness direction thereof.
In the one group, the plurality of cooling paths in a magnetic field are arranged in a row in one direction on one surface.
The said one lined up in the one direction with respect to a plurality of predetermined directions selected from the direction along the plane perpendicular to the one surface and the opposite directions sandwiching the plane including the center line of the row arranged in the same row. The magnetic field cooling paths adjacent to each other among the plurality of magnetic field cooling paths are formed so as to penetrate in the same direction or different directions from each other.
Synchronous rotary electric machine characterized by that. The plurality of cooling paths in a magnetic field are formed so that the total ventilation area in each region opposite to each other with a plane perpendicular to one surface thereof is substantially the same as each other. The synchronous rotary electric machine according to claim 1. Each of the plurality of cooling paths in a magnetic field is characterized in that it includes the center of the rows arranged in the same row and is formed so as to alternately penetrate in opposite directions with a surface perpendicular to the one surface thereof. The synchronous rotary electric machine according to claim 1 or 2. One of claims 1 to 3, wherein each of the plurality of cooling paths in a magnetic field includes the center of the row arranged in the same row and is formed along a plane perpendicular to the surface of one of the rows. Synchronous rotary electric machine described in item 1. The synchronous rotary electric machine according to any one of claims 1 to 4, wherein each of the plurality of cooling paths in a magnetic field is formed in a straight line. The rotor magnetic path portion is a cylindrical rotor body portion that is concentric with the rotor shaft and is attached to the rotor shaft via a body support plate.
The rotor has a plurality of permanent magnets or field windings arranged in the rotor body portion at intervals in the circumferential direction as the magnetic force generating portion and extending in the axial direction, respectively.
A plurality of body vent holes are formed as cooling paths in a plurality of magnetic fields in the rotor body portion sandwiched between the permanent magnets or field windings adjacent to each other in the circumferential direction.
The synchronous rotary electric machine according to any one of claims 1 to 5, wherein the synchronous rotary electric machine is characterized. The rotor magnetic path portion is a disk-shaped rotor core attached to the rotor shaft.
The stator magnetic path portion is fixed in the shape of a perforated disk having a circular opening arranged concentrically with the rotor shaft so as to sandwich the rotor core in the axial direction and having a gap with the rotor shaft in the center. It is a child iron core,
The rotor has a plurality of permanent magnets or electromagnets arranged in the rotor core at intervals in the circumferential direction and extending in the radial direction as the magnetic force generating portion.
The stator includes a plurality of stator teeth formed as the magnetic force generating portion on the surface of the stator core on the side facing the rotor core so as to extend radially at intervals from each other in the circumferential direction. With multiple stator windings wound around multiple stator teeth,
The synchronous rotary electric machine according to any one of claims 1 to 5, wherein the synchronous rotary electric machine is characterized. The rotor magnetic path portion is a disk-shaped rotor core attached to the rotor shaft.
The stator magnetic path portion is a perforated disc-shaped stator core arranged concentrically with the rotor shaft so as to sandwich the rotor core in the axial direction and having a gap on the outer surface of the rotor shaft in the center. ,
The stator has a plurality of permanent magnets or electromagnets arranged in the stator core at intervals in the circumferential direction and extending in the radial direction as the magnetic force generating portion.
The rotor includes a plurality of rotor teeth formed as the magnetic force generating portion on the surface of the rotor core facing the stator core so as to extend radially at intervals from each other in the circumferential direction. With multiple rotor windings wound around multiple rotor teeth,
The synchronous rotary electric machine according to any one of claims 1 to 5, wherein the synchronous rotary electric machine is characterized.

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