JP6230478B2 - Rotor, rotating electrical machine, and compressor - Google Patents

Description

  The present invention relates to a rotor in which a permanent magnet is embedded, a rotating electric machine including the rotor, and a compressor in which the rotating electric machine is mounted. In particular, the permanent magnet and a stator coil are efficiently combined. The present invention relates to a rotor to be cooled, a rotating electric machine, and a compressor.

In a rotating electrical machine such as an IPM motor using a rotor in which a permanent magnet is embedded, the temperature of the permanent magnet increases due to heat generated by the rotating electrical machine during operation, and the magnetic flux that generates torque decreases.
Therefore, conventionally, techniques for cooling the rotor have been proposed. As such, there is a pump that cools the permanent magnet by guiding the liquid refrigerant supplied into the rotor shaft through the refrigerant supply shaft to the installation site of the permanent magnet in the rotor core.

  Specifically, the liquid refrigerant flows from the inside of the rotor shaft to the coolant passage formed in the rotor shaft, the inner coolant groove formed in the end plate, the flux barrier of the rotor core, and the outer coolant groove formed in the end plate. Is a cooling structure of the motor that is sequentially discharged to the stator winding from the outer refrigerant groove of the end plate (see, for example, Patent Document 1).

JP 2009-27800 A (page 5-7, FIG. 2)

Since the motor cooling structure described in Patent Document 1 cools the permanent magnet with liquid refrigerant, a pump and piping for circulating the liquid refrigerant are required, and the rotor shaft (rotor shaft) has a hollow portion. There is a problem that the cost of the apparatus increases because of the structure.
Further, since the rotor shaft has a hollow portion formed on the inner side and has a large diameter, there is a problem that the volume of the rotor core (rotor core) is reduced, and the efficiency of the motor as a rotating electrical machine is reduced.
In addition, the stator winding (stator coil) is cooled by blowing the coolant from the outer refrigerant grooves of the end plates at both ends of the rotor (rotor) to the stator winding (stator coil), so that the stator (stator) coil Although the end can be sufficiently cooled, there has been a problem that the stator winding at the axial center portion of the stator where the temperature is higher than the coil end cannot be directly cooled.

  The present invention has been made in order to solve the above-described problems, and its purpose is that the structure for cooling the permanent magnet and the stator of the rotor is simple, and the cooling capacity of the permanent magnet is excellent. A rotor, a rotary electric machine equipped with the rotor, and a compressor equipped with the rotary electric machine capable of preventing a reduction in the efficiency of the rotary electric machine and efficiently cooling the axial center of the stator coil are obtained. That is.

  In the first rotor according to the present invention, the rotor core has an axial flow path hole, and a magnetic plate in which the circumferential end of the magnet hole is a magnet hole gap is laminated. All or a part of the plurality of magnetic plates formed and laminated, the outer peripheral side radial flow channel connecting the magnet hole gap and the outer periphery of the magnetic plate, the axial flow channel hole and the magnet hole A groove-forming magnetic plate provided on the surface with an inner peripheral radial flow channel connecting the gap, and at least one end plate in contact with the rotor core is opposed to the axial flow channel hole A gas refrigerant intake is provided at the position.

  In the second rotor according to the present invention, the rotor core has a plurality of magnet holes provided in the circumferential direction at positions on the outer peripheral side, and a shaft through hole provided in the center. Is formed by laminating magnetic plates whose end portions in the circumferential direction are magnet hole gaps, and all or part of the plurality of laminated magnetic plates is the outer circumference of the magnet hole gap and the magnetic plate Is a groove-forming magnetic plate provided on the surface with an outer peripheral radial flow path groove, and at least one of the end plates is part or all of the magnet hole gap at a position facing the magnet hole gap Is provided with a hole or a notch that becomes a gas refrigerant inlet.

  In the third rotor according to the present invention, the rotor core has an axial flow path hole and a second axial flow path hole, and the circumferential end of the magnet hole is a magnet hole gap. The magnetic plate is formed by laminating magnetic plates in which the corners on the partitioning portion side of the magnet holes are the second magnet hole gaps, and all or one of the plurality of laminated magnetic plates is formed. The outer circumferential side radial flow channel connecting the magnet hole gap and the outer periphery of the magnetic plate, the inner circumferential radial flow channel connecting the axial flow path hole and the magnet hole gap, 2 axial flow path holes and a second inner peripheral radial flow path groove connecting the second magnet hole gap and the partition part are provided on the surface, and the partition part is thinned. And at least one end plate in contact with the rotor core is opposed to the axial passage hole and the second axial passage hole. In which it is provided inlet gaseous refrigerant to each of the positions.

  In a fourth rotor according to the present invention, the rotor core has an axial flow path hole, and the circumferential end of the magnet hole is a magnet hole gap, and the magnet hole partitioning part. Are formed by laminating magnetic plates having the second magnet hole gaps at the corners on the side, and all or part of the plurality of laminated magnetic plates is composed of magnet hole gaps and magnetic plates. An outer peripheral radial flow channel connecting the outer periphery of the outer peripheral surface, and an inner peripheral radial flow channel connecting the axial flow channel hole and the second magnet hole gap and partition. And a groove-forming magnetic plate whose partition is thinned, and at least one end plate in contact with the rotor core is provided with a gas refrigerant intake at a position facing the axial flow path hole It is.

  In the fifth rotor according to the present invention, the rotor core has a magnet hole gap at the circumferential end of the magnet hole, and the corner on the partitioning side of the magnet hole is the second magnet hole gap. The outer peripheral radial flow path is formed by laminating the magnetic plates serving as a part, and all or a part of the plurality of laminated magnetic plates connects the magnet hole gap and the outer periphery of the magnetic plate. A groove-forming magnetic plate having a groove provided on a surface thereof, wherein at least one end plate in contact with the end surface of the rotor core has a position facing the magnet hole gap and a position facing the second magnet hole gap; Are provided with a gas refrigerant inlet.

  In a sixth rotor according to the present invention, the rotor iron core has an axial flow path hole and a second axial flow path hole, and a circumferential end of the magnet hole is a magnet hole gap. The magnetic plate is formed by laminating magnetic plates in which the corners on the partitioning portion side of the magnet holes are the second magnet hole gaps, and all or one of the plurality of laminated magnetic plates is formed. The portion is a groove-forming magnetic plate on the surface of which the outer peripheral radial flow channel connecting the gap between the magnet hole and the outer periphery of the magnetic plate is provided, and the end plate is positioned opposite the axial flow channel A gas refrigerant intake port is provided in at least one of a position facing the second axial flow path hole, a position facing the magnet hole gap, and a position facing the second magnet hole gap. It is what.

  In a seventh rotor according to the present invention, the rotor iron core has an axial flow path hole and a second axial flow path hole, and a circumferential end of the magnet hole is a magnet hole gap. The magnetic plate is formed by laminating magnetic plates in which the corners on the partitioning portion side of the magnet holes are the second magnet hole gaps, and all or one of the plurality of laminated magnetic plates is formed. The outer circumferential side radial flow channel connecting the magnet hole gap and the outer periphery of the magnetic plate, the inner circumferential radial flow channel connecting the axial flow path hole and the magnet hole gap, 2 axial flow path holes and a second inner peripheral radial flow path groove connecting the second magnet hole gap and the partition part are provided on the surface, and the partition part is thinned. And at least one end plate in contact with the rotor core is positioned opposite to the axial flow path hole and positioned opposite to the second axial flow path hole. And in each of the positions located facing the second magnet holes gap portion facing the magnet hole gap portion, in which are provided inlet gaseous refrigerant.

  Since the rotor according to the present invention is configured as described above, the cooling capacity of the permanent magnet is excellent and the stator coil can be efficiently cooled.

It is a front schematic diagram of the groove formation magnetic board used for the rotor concerning Embodiment 1 of this invention. It is the schematic diagram which made the half of the radial direction in the rotor concerning Embodiment 1 of this invention a cross section. It is the side surface schematic diagram which looked at the outer peripheral side bridge | bridging part of the groove formation magnetic board in the rotor core concerning Embodiment 1 of this invention from the outer peripheral side. It is a plane schematic diagram which shows the outer peripheral side bridge | bridging part (a) of a groove formation magnetic board in the rotor iron core concerning Embodiment 1 of this invention, and the part (b) which overlaps with the outer peripheral side bridge | bridging part in a flat magnetic board. . It is a cross-sectional schematic diagram of the rotary electric machine using the rotor concerning Embodiment 1 of this invention. It is a partial plane schematic diagram of the groove | channel formation magnetic board in the rotor concerning Embodiment 2 of this invention. It is a partial plane schematic diagram of the groove | channel formation magnetic board in the rotor concerning Embodiment 3 of this invention. It is a partial plane schematic diagram of the groove | channel formation magnetic board in the rotor concerning Embodiment 4 of this invention. It is a partial plane schematic diagram of one end plate in the rotor concerning Embodiment 4 of this invention. It is the schematic diagram which made the cross section the half of the radial direction in the rotor concerning Embodiment 4 of this invention. It is the schematic diagram which made the half of radial direction the cross section in the rotor concerning Embodiment 5 of this invention. It is a cross-sectional schematic diagram which shows the compressor concerning Embodiment 6 of this invention.

Embodiment 1 FIG.
FIG. 1 is a schematic front view of a groove-forming magnetic plate used in the rotor according to Embodiment 1 of the present invention.
A groove-forming magnetic plate 5a is used as the magnetic plate of the rotor of the present embodiment.
As shown in FIG. 1, the groove-forming magnetic plate 5a has a magnet hole 51 into which a permanent magnet is inserted, an axial flow path hole 52, an outer peripheral radial flow groove 53a, and an inner peripheral radial flow. A road groove 53b and a shaft through hole 54 are provided.

A plurality of magnet holes 51 are provided in the circumferential direction at positions on the outer peripheral side of the groove-forming magnetic plate 5a. The magnet holes 51 are formed by a magnet occupying portion 51a and a magnet hole gap portion 51b on the outer side in the circumferential direction. The boundary between the magnet occupying portion 51a and the magnet hole gap portion 51b is indicated by a broken line. A boundary 55 is formed between the magnet hole gaps 51b adjacent in the circumferential direction.
The axial flow path hole 52 is provided at a position facing the boundary portion 55 in the circumferential direction on the radially inner side. That is, the axial flow path hole 52 is provided on the inner side in the radial direction so as to face the portion between the adjacent magnet holes 51 in the radial direction. The shaft through hole 54 is provided at the center.

The outer peripheral radial flow channel 53a connects the outer periphery of the groove-forming magnetic plate 5a and the magnet hole gap 51b. Two adjacent outer peripheral radial flow grooves 53 a and a portion connecting the two outer radial flow grooves 53 a constitute an outer peripheral bridge portion 56.
The inner circumferential side radial flow channel 53b connects the axial flow channel hole 52 and the magnet hole gap 51b. Further, the inner circumferential radial passage groove 53b connects one axial passage hole 52 and two adjacent magnet hole gaps 51b.

In the present embodiment, the outer peripheral side radial flow groove 53a and the inner peripheral radial flow groove 53b are formed on one surface of the groove-forming magnetic plate 5a.
The magnet hole 51 is preferably installed on the outer peripheral side, but if it is on the outer peripheral side, the radial width of the outer peripheral radial flow groove 53a is reduced, and the strength of the outer peripheral radial flow groove 53a is reduced. . Therefore, the magnet hole 51 is provided on the outer peripheral side within a range in which the outer peripheral radial flow channel 53a having a strength capable of withstanding the maximum load applied when the rotor is used in a rotating electrical machine can be formed.
The axial flow path hole 52 is preferably as close to the magnet hole gap 51b as possible, but if it is too close to the magnet hole gap 51b, the strength of the inner circumferential radial flow groove 53b is reduced. Therefore, the axial flow path hole 52 is close to the magnet hole gap 51b as long as the inner circumferential radial flow groove 53b having a strength capable of withstanding the maximum load applied when the rotor is used in a rotating electrical machine can be formed. is set up.

A flat magnetic plate 5b is also used as the magnetic plate of the rotor of the present embodiment.
The flat magnetic plate 5b is the same as the groove-forming magnetic plate 5a except that the outer peripheral side radial flow channel 53a and the inner peripheral side radial flow channel 53b are not provided.
That is, the flat magnetic plate 5b has the same outer shape as the groove-forming magnetic plate 5a, and the magnet hole 51, the axial flow path hole 52, and the shaft through hole 54 are provided at the same positions as the groove-forming magnetic plate 5a. It has been.
Moreover, the magnet hole 51 of the flat magnetic plate 5b is also formed by the magnet occupation part 51a and the magnet hole space | gap part 51b.

FIG. 2 is a schematic diagram in which a half in the radial direction of the rotor according to the first embodiment of the present invention is taken as a cross section.
As shown in FIG. 2, the rotor 100 according to the present embodiment includes a rotor core 3, permanent magnets 4 inserted into magnet insertion holes of the rotor core 3, and axial directions of the rotor core 3. The rotor core 3 and the end plate 2 are inserted into the end plate 2 installed in contact with the end face, the through hole provided in the center of the rotor core 3 and the through hole provided in the center of the end plate 2. And a shaft 1 for fixing.
Each permanent magnet 4 inserted into each magnet insertion hole forms one pole.

  As shown in FIG. 2, the rotor core 3 is formed by laminating a large number of magnetic plates. In the present embodiment, the central portion in the axial direction is a portion where a predetermined number of groove-forming magnetic plates 5a are stacked, and both sides in the axial direction of the portion where the groove-forming magnetic plates 5a are stacked are a predetermined number of flat portions. This is a portion where the magnetic plate 5b is laminated.

  And in the part which laminated | stacked the groove formation magnetic board 5a, the surface in which the outer peripheral side radial flow path groove 53a and the inner peripheral side radial flow path groove 53b of one groove formation magnetic board 5a are provided, and others The groove-forming magnetic plate 5a is laminated with the outer peripheral side radial flow channel groove 53a and the surface on which the inner peripheral side radial flow channel groove 53b is not provided being overlapped, whereby the outer peripheral side radial flow channel groove 53a. The outer peripheral side radial flow path portion 33a is formed, and the inner peripheral side radial flow path portion 33b is formed by the inner peripheral side radial flow path groove 53b. However, the groove-forming magnetic plate 5a at either one end in the axial direction has a flat magnetic surface on the surface where the outer peripheral side radial flow channel 53a and the inner peripheral side radial flow channel 53b are provided. An outer peripheral side radial flow path portion 33a and an inner peripheral side radial flow path portion 33b are formed in contact with the surface of the plate 5b.

The rotor core 3 is formed with a magnet insertion hole in which the magnet holes 51 are continuous in the axial direction by laminating the magnetic plates 5a and 5b, and the axial flow path hole 52 is continuous in the axial direction. An axial flow path portion 32 is formed. The magnet insertion hole and the axial flow path hole 52 penetrate the rotor core 3 in the axial direction.
Moreover, the magnet hole space | gap part 51b is continued in the axial direction, and forms the magnet insertion hole space | gap part 31b. The magnet insertion hole gap 31b also penetrates the rotor core 3 in the axial direction. The magnet insertion hole gap 31b serves as a flux barrier.

The end plate 2 is provided with an inlet (referred to as a gas refrigerant inlet) 2a through which a gaseous refrigerant is taken in a position facing the axial flow path portion 32 in the circumferential direction.
That is, the gaseous refrigerant inlet 2 a and the axial flow path portion 32 form an axial flow path that takes in and flows the gaseous refrigerant outside the rotor 100.

  Moreover, in the part which laminated | stacked the groove | channel formation magnetic board 5a in the rotor core 3, the inner peripheral side radial direction flow-path part 33b connected to the axial direction flow-path part 32, the magnet insertion hole space | gap part 31b, and the outer peripheral side A radial flow path is formed by the radial flow path portion 33a.

Next, a mechanism for cooling the permanent magnet 4 in the rotor 100 of the present embodiment will be described.
When the rotor 100 rotates, the gas refrigerant in the magnet insertion hole gap portion 31b is discharged to the outside of the rotor 100 through the outer peripheral radial flow path portion 33a by centrifugal force. Then, since the pressure in the magnet insertion hole gap portion 31b decreases, the gas refrigerant flows from the axial flow passage portion 32 into the magnet insertion hole gap portion 31b via the inner peripheral radial flow passage portion 33b. Then, since the pressure in the axial flow path portion 32 decreases, external gas refrigerant is taken into the axial flow path portion 32 from the gas refrigerant intake port 2 a of the end plate 2.

That is, as indicated by an arrow L in FIG. 2, the gas refrigerant flows from the outside through the gas refrigerant inlet 2 a and flows into the axial flow path portion 32. Next, as indicated by an arrow M in FIG. 2, the gas refrigerant flows from the axial flow path portion 32 to the inner peripheral radial flow path portion 33 b, the magnet insertion hole gap portion 31 b, and the outer peripheral radial flow channel portion 33 a. Are sequentially passed through and discharged to the outside of the rotor 100.
When the gaseous refrigerant passes through the magnet insertion hole gap 31b, it flows while contacting the surface of the permanent magnet 4 to cool the permanent magnet 4.

Next, the structure of the outer peripheral radial flow path groove 53a in the groove-forming magnetic plate 5a will be described.
FIG. 3 is a schematic side view of the outer bridge portion of the groove-forming magnetic plate in the rotor core according to the first embodiment of the present invention as seen from the outer circumference side.
As shown in FIG. 3, the outer peripheral radial flow channel 53a is formed with T being the thickness of the non-thinned portion of the outer peripheral bridge portion 56 where the outer peripheral radial flow channel 53a is not formed. The thickness of the part is Tc. T is also the thickness of the flat magnetic plate 5b.
The plate thickness Tc in the portion of the outer peripheral radial flow channel 53a is smaller than T and is desired to be as thin as possible from the viewpoint of securing the flow path of the gas refrigerant. It is desirable to set it as 0.7T.

FIG. 4 is a plan view showing the outer peripheral bridge portion (a) of the groove-forming magnetic plate and the portion (b) overlapping the outer peripheral bridge portion of the flat magnetic plate in the rotor core according to the first embodiment of the present invention. It is a schematic diagram.
As shown in FIG. 4, the radial width of the outer peripheral radial flow groove 53a in the groove-forming magnetic plate 5a is Wa, and the outer periphery of the flat magnetic plate 5b that is not formed with a groove and is not thinned. The width in the radial direction of a portion (referred to as a connecting portion) 45a overlapping with the side radial direction flow channel groove 53a is Wb.

The connecting portion 45a having the width Wb in the flat magnetic plate 5b has a strength that can withstand a maximum load applied when the rotor 100 is used in a rotating electrical machine.
However, the outer peripheral radial flow channel 53a has a thickness Tc that is thinner than the thickness T of the flat magnetic plate 5b, so that if Wa is the same as Wb, its strength is lower than the strength of the connecting portion 45a. .
That is, in order to make the strength of the outer circumferential side radial flow channel 53a equal to the strength of the connecting portion 45a, it is necessary to make Wa larger than Wb.

As a result of performing the stress calculation using the outer peripheral side radial flow groove 53a as a simple beam model, in order to make the stress applied to the outer peripheral side radial flow groove 53a equivalent to the stress applied to the connecting portion 45a, Wa is set to Wb. It was found that it was necessary to do as follows.
When Tc = 0.5T, Wa≈1.4Wb
When Tc = 0.6T, Wa≈1.3Wb
When Tc = 0.7T, Wa≈1.2Wb
When Tc = 0.8T, Wa≈1.1Wb
From these results, in the range of 1> (Tc / T) ≧ 0.5, the marginal width Wa of the outer peripheral radial flow groove 53a is set to a margin 45a in the flat magnetic plate 5b. Is set to 1.5 times the radial width Wb, the mechanical strength of the rotor core 3 is ensured. That is, if the radial width Wa of the outer peripheral radial flow groove 53a is 1.5 times the width of the portion where the outer peripheral radial flow groove that is not thinned to ensure mechanical strength is formed, good.
If the width of the portion that forms the outer circumferential radial flow channel groove before the thinning is originally wide and this width is not less than 1.5 times the width having the strength to withstand the maximum load, the outer circumferential radial flow The width Wa in the radial direction of the road groove 53a may be the same as before the thinning.

Next, an example of a method for manufacturing the rotor 100 of the present embodiment will be described.
The magnetic plates 5a and 5b are produced by punching out electromagnetic steel plates. At this time, the shaft through hole 54, the magnet hole 51, and the axial flow path hole 52 are also formed at the same time.
Next, the groove-forming magnetic plate 5a is formed by providing the outer peripheral side radial flow groove 53a and the inner peripheral radial flow groove 53b on one surface of the magnetic plate by pressing or etching. . The magnetic plate not provided with the radial flow grooves 53a and 53b is a flat magnetic plate 5b.

Next, after a predetermined number of flat magnetic plates 5b are stacked, a predetermined number of groove-forming magnetic plates 5a are stacked on the stacked portions of the flat magnetic plates 5b. Further, a predetermined number of flat magnetic plates 5b are laminated on the laminated portion of the groove-forming magnetic plates 5a, and all the magnetic plates are joined by a conventional method to form the rotor core 3.
Next, after the permanent magnet 4 is inserted into the magnet insertion hole, the end plate 2 provided with the through-hole into which the shaft 1 is inserted and the gas refrigerant inlet 2a is disposed in contact with both ends of the rotor core 3. Then, the shaft 1 is inserted into the through holes formed in the center portions of the end plate 2 and the rotor core 3, and the rotor core 3 and the end plate 2 are attached to the shaft 1 by shrink fitting or the like. The rotor 100 is manufactured by fixing.
In the present embodiment, electromagnetic steel plates are used for the magnetic plates 5a and 5b, but any plate-like body having magnetic properties such as SPCC can be used as long as grooving is possible.

Next, the rotating electrical machine 150 using the rotor 100 of the present embodiment will be described.
FIG. 5 is a schematic cross-sectional view of a rotating electrical machine using the rotor according to Embodiment 1 of the present invention.
As shown in FIG. 5, the rotating electrical machine 150 of the present embodiment includes a stator 120 disposed concentrically with a predetermined distance from the outer peripheral surface of the rotor 100. In FIG. 5, configurations other than the rotor 100 and the stator 120 are omitted.
The stator 120 includes a stator iron core 121 including a yoke portion 121a on the outer peripheral portion and a tooth portion 121b protruding in a radial direction from the inner peripheral surface of the yoke portion 121a, and a stator coil 122 wound around the tooth portion 121b. I have.

In the rotor 100 of the present embodiment, the axial flow path portion 32 in the rotor core 3 is provided near the magnet insertion hole gap portion 31b, and the magnet insertion hole gap portion 31b has a radial flow path. Since it forms, a radial direction flow path can be shortened.
Therefore, the rotor 100 according to the present embodiment has a small flow resistance in the radial flow path and can increase the flow rate of the gas refrigerant, so that the cooling effect of the permanent magnet 4 is excellent.
Moreover, since the axial direction flow path part 32 is arrange | positioned radially inside from the magnet insertion hole space | gap part 31b, the centrifugal force added to the gaseous medium in the axial direction flow path part 32 at the time of rotation of a rotor is given. It can be used effectively, and the flow rate of the gaseous refrigerant can be increased also from this aspect.
Moreover, since the axial direction flow path part 32 is arrange | positioned in the part between magnetic poles, the cooling capacity of the space | interval part where a permanent magnet is easy to demagnetize is high.

In the rotating electrical machine 150 of the present embodiment, the gaseous refrigerant that has passed through the radial flow path of the rotor core 3 is released from the outer peripheral portion of the rotor core 3.
Therefore, the stator core 121 disposed opposite to the outer peripheral side of the rotor core 3 is cooled. Further, the gas refrigerant reaches the stator coil 122 through the opening of the stator core 121, and also cools the stator coil 122 inside the stator core 121.
That is, the effect of cooling the stator 120 is also excellent.

  Further, in the rotating electrical machine 150 of the present embodiment, since the rotor 100 having a radial flow path provided in the central portion in the axial direction of the rotor core 3 is used, in general, the temperature is most likely to rise. The stator coil 122 at the center in the axial direction can be directly cooled with a gas refrigerant, and the effect of cooling the portion of the stator 120 where the temperature is most likely to rise is excellent.

In the rotor, a portion where the thickness of the magnetic plate, such as the outer peripheral radial flow channel 53a, is thinner on the outer peripheral side than the permanent magnet. When the magnetic flux reaches the stator, the cross-sectional area of the magnetic path is reduced, the magnetic path resistance is increased, and the magnetic flux from the rotor to the stator is reduced.
However, in the rotor 100 according to the present embodiment, the magnetic plate is thin and the cross-sectional area is small, and the outer circumferential radial flow path groove 53a in which the magnetic path resistance is increased is replaced with the groove-forming magnetic plate 5a. Since the outer peripheral bridge portion 56, that is, between the permanent magnets 4 adjacent in the circumferential direction is provided, the magnetic flux from the rotor 100 toward the stator 120 hardly decreases. Conversely, the amount of magnetic flux from the permanent magnet 4 to the stator 120 is increased by reducing leakage of the magnetic flux from the outer peripheral bridge portion 56.

That is, the rotor 100 according to the present embodiment and the rotating electrical machine 150 using the rotor 100 are excellent in the cooling effect between the rotor 100 and the stator 120. In addition, the magnetic flux of the permanent magnet 4 of the rotor 100 can be used efficiently. Further, the rotor 100 has sufficient mechanical strength.
In the rotor 100 according to the present embodiment, the groove-forming magnetic plate 5a is disposed in the central portion of the rotor core 3 in the axial direction, but the groove-forming magnetic plate 5a is formed in all regions in the axial direction of the rotor core 3. May be arranged. Further, the groove-forming magnetic plate 5a may be arranged at an interval between which a predetermined number of flat magnetic plates 5b are sandwiched.
In the present embodiment, each of the radial flow channel grooves 53a and 53b is formed on one surface of the groove-forming magnetic plate 5a, but may be formed on both surfaces. If it carries out like this, formation of each radial direction flow-path groove | channel 53a, 53b will become easy.
In the rotor of the present embodiment, the gas refrigerant intake port 2a provided at a position facing the axial flow path hole 52 is provided on both end plates, but is provided on at least one end plate. It should be.

Embodiment 2. FIG.
FIG. 6 is a partial schematic plan view of a groove-forming magnetic plate in a rotor according to Embodiment 2 of the present invention.
As shown in FIG. 6, the second groove-forming magnetic plate 205a, which is the groove-forming magnetic plate in the rotor of the present embodiment, is divided into the magnet holes 51 equally in the groove-forming magnetic plate 5a of the first embodiment. A thin partition part 260 that divides into two parts is provided to form two divided magnet holes 251, and the second axial flow path is located at a position radially inward of the thin partition part 260 and opposed to the thin partition part 260 in the radial direction. A hole 252 is provided. The boundary between the second magnet occupation part 251a and the magnet hole gap 51b in each divided magnet hole 251 is indicated by a broken line.

The second groove forming magnetic plate 205a is provided with a magnet hole gap 51b, an axial flow path hole 52, an outer peripheral radial flow groove 53a, and an inner peripheral radial flow groove 53b. It has been.
Further, a second inner circumferential radial flow channel 253b is provided to connect the thin partition portion 260 and the second axial flow channel hole 252. And the thickness of the thin partition part 260 is made the same as the thickness of the 2nd inner peripheral side radial direction flow-path groove | channel 253b.
In addition, a second magnet hole gap 251b is provided at the corner of each divided magnet hole 251 on the thin partition portion side. Also, the second inner peripheral radial flow channel 253b is also formed as a second groove. It may be formed on both surfaces of the magnetic plate 205a, and the thin partition portion 260 may also be formed by processing both surfaces of the second groove forming magnetic plate 205a.

The second flat magnetic plate, which is the flat magnetic plate of the rotor of the present embodiment, is a flat shape in which the magnet insertion hole gap 31b and the axial flow path hole 52 of the first embodiment are provided. The magnetic plate 5b is provided with a non-thinned same-thickness partitioning part that equally divides the magnet hole 51 into two parts, and the divided magnet hole 251 is formed in the same manner as the second groove-forming magnetic plate 205a. is there.
Then, a second axial flow path hole 252 similar to the second groove forming magnetic plate 205a is provided at a position facing the same thickness partition portion inside the same thickness partition portion. The thickness of the same thickness partition is the same as the thickness of the second flat magnetic plate.
In addition, a second magnet hole gap portion 251b similar to the second groove forming magnetic plate 205a is provided at a corner portion of the divided magnet hole 251 on the same thickness partition portion side.

When the second groove-forming magnetic plate 205a is laminated, the outer peripheral side radial flow path portion 33a by the outer peripheral side radial flow channel groove 53a and the inner peripheral side radial flow path portion 33b by the inner peripheral side radial flow channel groove 53b. And the 2nd inner peripheral side radial flow path part by the 2nd inner peripheral side radial flow path groove 253b, and the partition part radial direction flow path part by the thin partition part 260 are formed.
When the second flat magnetic plate and the second groove-forming magnetic plate 205a are laminated, the axial flow passage portion 32 by the axial flow passage hole 52, the magnet insertion hole gap portion 31b by the magnet hole gap portion 51b, and the first A second axial flow path portion formed by the two axial flow path holes 252 and a second magnet insertion hole void portion formed by the second magnet hole gap portion 251b are formed.
In addition, a divided magnet insertion hole is formed by each divided magnet hole 251.

The second rotor core, which is the rotor core in the rotor of the present embodiment, is formed by laminating the second groove-forming magnetic plate 205a and the second flat magnetic plate in the same manner as in the first embodiment. Two divided magnet insertion holes are formed for each magnetic pole.
A permanent magnet is inserted into each of the two divided magnet insertion holes.
Moreover, the 2nd end plate which is an end plate of the rotor of this Embodiment provides the 2nd gaseous refrigerant intake in the end plate 2 of Embodiment 1. FIG.
That is, in the second rotor core, the gas refrigerant intake 2a is provided at a position facing the axial flow path portion 32, and the second gas refrigerant intake is positioned at a position facing the second axial flow path portion. An entrance is provided.

The rotor of the present embodiment is similar to that of the first embodiment, using the second rotor core, the second end plate, two permanent magnets that form one pole, and the shaft 1. Are produced.
The thickness of the thin partition 260 may be 0.5 to 0.7 times the thickness of the non-thinned portion.
The width of the thin partition portion 260 in the circumferential direction may be 1.5 times the width of the same thickness partition portion of the second flat magnetic plate having the strength to withstand the applied maximum load. That is, the circumferential width of the thin partition 260 may be 1.5 times the circumferential width of the non-thinned partition having strength to withstand the applied maximum load.
Originally, if the width in the circumferential direction of the partition before thinning is wide and this width is 1.5 times or more the width having the strength to withstand the maximum load, the width in the circumferential direction of the thin partition 260 is thin. It may be the same as the width of the partition part that is not converted.
The rotating electrical machine of the present embodiment is the same as the rotating electrical machine of the first embodiment, except that the rotor of the present embodiment is used as the rotor.

Next, a mechanism for cooling the permanent magnet in the rotor of the present embodiment will be described.
When the rotor rotates, like the rotor 100 of the first embodiment, the gaseous refrigerant flows from the outside through the gaseous refrigerant inlet 2a and flows into the axial flow path section 32, and then the axial flow path section 32. From the inner circumferential side radial flow path portion 33b, the magnet insertion hole gap portion 31b, and the outer circumferential side radial flow path 33a in this order, they are discharged to the outside of the second rotor.
Further, after the gas refrigerant passes through the second gas refrigerant intake port from the outside and flows into the second axial flow path portion, the second inner peripheral side diameter is passed from the second axial flow path portion. Directional flow path section, partitioning section radial flow path section and second magnet insertion hole gap, gap between each divided magnet insertion hole and permanent magnet, magnet insertion hole gap 31b, outer peripheral side radial flow It passes through the path portion 33a in order and is discharged to the outside of the rotor.

That is, in the rotor and the rotating electrical machine of the present embodiment, a new gas refrigerant flow path from the second gas refrigerant intake port to the outer peripheral radial flow path portion 33a is added. In addition, it is possible to cool almost the entire surface of the permanent magnet with the gas refrigerant, and the cooling capacity is improved.
In addition, since the axial flow path portion 32 and the second axial flow path portion are disposed radially inward from the split magnet insertion hole, the axial flow path portion 32 and the second axial flow path portion are arranged in the axial flow path portion 32 and at the time of rotation of the rotor. The centrifugal force applied to the gas medium in the two axial flow paths can be used effectively, and the flow rate of the gas refrigerant can be increased also from this surface.

Moreover, since the axial direction flow path part 32 is arrange | positioned in the part between magnetic poles, the cooling capacity of the space | interval part where a permanent magnet is easy to demagnetize is high.
In the rotor of the present embodiment, the second groove-forming magnetic plate 205a is arranged at the center in the axial direction of the second rotor core, but all regions in the axial direction of the second rotor core are arranged. The second groove-forming magnetic plate 205a may be disposed in the middle.
In the rotor of the present embodiment, the gas refrigerant inlet 2 a provided at a position facing the axial flow path hole 52 and the second position provided at a position facing the second axial flow path hole 252. The gas refrigerant intake may be provided on at least one of the end plates.

Embodiment 3 FIG.
FIG. 7 is a partial schematic plan view of a groove-forming magnetic plate in a rotor according to Embodiment 3 of the present invention.
As shown in FIG. 7, the third groove-forming magnetic plate 305a that is the groove-forming magnetic plate in the rotor of the present embodiment is the same as the second groove-forming magnetic plate 205a of the second embodiment in the axial direction flow path. The hole 52 and the inner peripheral radial flow channel 53b are omitted.
The third flat magnetic plate, which is the flat magnetic plate of the rotor of the present embodiment, is obtained by omitting the axial flow path hole 52 from the second flat magnetic plate of the second embodiment.
The third end plate, which is the end plate of the rotor of the present embodiment, is obtained by omitting the gas refrigerant intake port 2a from the second end plate of the second embodiment.

The third rotor core, which is the rotor core in the rotor of the present embodiment, is formed by laminating the third groove-forming magnetic plate 305a and the third flat magnetic plate in the same manner as in the first embodiment. Formed.
The rotor of the present embodiment is similar to that of the first embodiment, using a third rotor core, a third end plate, two permanent magnets that form one pole, and a shaft 1. Are produced.
The rotating electrical machine of the present embodiment is the same as the rotating electrical machine of the first embodiment, except that the rotor of the present embodiment is used as the rotor.

Next, a mechanism for cooling the permanent magnet in the rotor of the present embodiment will be described.
When the rotor rotates, the gas refrigerant passes through the second gas refrigerant inlet from the outside and flows into the second axial flow path portion from the outside, and then from the second axial flow path portion, Inner peripheral radial flow channel, partition radial flow channel and second magnet insertion hole gap, gap between each divided magnet insertion hole and permanent magnet, magnet insertion hole gap 31b, outer circumference It passes through the side radial direction flow path part 33a in order and is discharged to the outside of the rotor.

In the rotor and the rotating electrical machine of the present embodiment, since the flow path of the gas refrigerant extends from the second gas refrigerant intake port to the outer peripheral radial flow path portion 33a, almost the entire surface of the permanent magnet is cooled with the gas refrigerant. In addition, the stator coil can be cooled with a gaseous refrigerant discharged from the rotor.
In addition, since the radial flow path portion is disposed only at the central portion of the magnetic pole inside the permanent magnet, the magnetic path in the magnetic plate is rarely obstructed.
In the rotor according to the present embodiment, the third groove-forming magnetic plate 305a is disposed in the central portion in the axial direction of the third rotor core, but all regions in the axial direction of the third rotor core are disposed. The third groove-forming magnetic plate 305a may be disposed on the second plate.
In the rotor of the present embodiment, the second gas refrigerant intake provided at a position facing the second axial flow path hole 252 may be provided on at least one end plate.

Embodiment 4 FIG.
FIG. 8 is a partial schematic plan view of a groove-forming magnetic plate in a rotor according to Embodiment 4 of the present invention.
As shown in FIG. 8, the fourth groove forming magnetic plate 405a, which is the groove forming magnetic plate of the rotor 400 of the present embodiment, is the same as the inner surface of the second groove forming magnetic plate 205a of the second embodiment. The radial flow channel groove 53 b and the second inner peripheral radial flow channel groove 253 b are omitted, and the same thick partition portion 460 is used instead of the thin partition portion 260. And the 4th groove formation magnetic board 405a is provided with the outer peripheral side radial direction flow path groove | channel 53a on both surfaces.

The fourth flat magnetic plate 405b, which is the flat magnetic plate of the rotor of the present embodiment, is the same as the second flat magnetic plate of the second embodiment.
Further, in FIG. 8, when a rotor is used, a third gas refrigerant intake port 402d and a fourth gas refrigerant intake port 402e provided in one fourth end plate 402b, which will be described later, face each other. The portion of the fourth groove forming magnetic plate 405a is indicated by a dotted line.
The fourth rotor core, which is the rotor core of the rotor 400 of the present embodiment, has a fourth groove-forming magnetic plate 405a stacked thereon, and a fourth flat magnetic plate 405b connected to this stacked portion. It is formed by stacking.

FIG. 9 is a partial schematic plan view of one end plate in the rotor according to Embodiment 4 of the present invention.
As shown in FIG. 9, one fourth end plate 402b which is the end plate of the rotor of the present embodiment is the same shape as that of the second end plate of the second embodiment. A third gas refrigerant inlet 402d is provided at a position facing the magnet hole gap 51b of 405a, 405b, and a fourth gas refrigerant is placed at a position facing the second magnet hole gap 251b of each magnetic plate 405a, 405b. An intake port 402e is provided.

That is, one fourth end plate 402b includes the gas refrigerant inlet 2a, the second gas refrigerant inlet 402c, the third gas refrigerant inlet 402d, and the fourth gas refrigerant inlet 402e. I have.
Further, the other fourth end plate 402a which is the end plate of the rotor of the present embodiment has the same shape as the second end plate of the second embodiment.
In the present embodiment, the other fourth end plate 402a may be the same as the one fourth end plate 402b.

FIG. 10 is a schematic view in which a half in the radial direction of the rotor according to the fourth embodiment of the present invention is taken as a cross section.
As shown in FIG. 10, the rotor 400 according to the present embodiment forms one pole with the fourth rotor core 403 and two pieces inserted into the divided magnet insertion holes of the fourth rotor core 403. The permanent magnet 404, one fourth end plate 402b installed on one end face of the fourth rotor core 403, and the other fourth end face installed on the other end face of the fourth rotor core 403. Inserted into the end plate 402a, a through hole provided in the center of the fourth rotor core 403, and a through hole provided in the center of one fourth end plate 402b and the other fourth end plate 402a. The fourth rotor core 403 and the shaft 1 that fixes each of the fourth end plates 402a and 402b are provided.

The fourth rotor core 403, which is the rotor core in the rotor 400 of the present embodiment, is also formed by stacking magnetic plates, and one side in the axial direction is stacked with a fourth flat magnetic plate 405b. And the other side in the axial direction is a portion where the fourth groove forming magnetic plate 405a is laminated.
In the portion where the fourth groove forming magnetic plate 405a of the fourth rotor core 403 is laminated, an outer peripheral side radial flow path portion 433a is formed in the radial direction by two outer peripheral side radial flow path grooves 53a. Yes. In addition, one end surface of the portion where the fourth groove-forming magnetic plate 405a is stacked is in contact with the fourth flat magnetic plate 405b, and the other end surface is in contact with the other fourth end plate 402a. The outer peripheral side radial direction flow path part 33a is formed in this.

The rotating electrical machine of the present embodiment is the same as the rotating electrical machine of the first embodiment except that the rotor 400 of the present embodiment is used as the rotor.
Next, a mechanism for cooling the permanent magnet 4 in the rotor 400 of the present embodiment will be described.
When the rotor 400 rotates, the gas refrigerant in the magnet insertion hole gap 31b is brought outside of the rotor 400 via the outer circumferential radial flow path portions 433a and 33a as indicated by an arrow M by centrifugal force. Released. Then, since the pressure in the magnet insertion hole gap 31b is reduced, as indicated by an arrow N, external gas refrigerant is taken into the magnet insertion hole gap 31b from the third gas refrigerant intake port 402d.

In addition, the gas refrigerant passes through the fourth gas refrigerant inlet 402e from the outside, and is formed with the second magnet insertion hole gap portion formed by the second magnet hole gap portion 251b, the split magnet insertion hole, and the permanent magnet. , The magnet insertion hole gap portion 31b, and the outer peripheral radial flow paths 433a and 33a in this order and discharged to the outside of the rotor.
That is, the rotor 400 is cooled by the gas medium that flows from the third gas refrigerant intake port 402d to the outer peripheral radial flow path portions 433a and 33a. In addition, almost the entire surface of the permanent magnet is effectively cooled by the gas medium flowing from the fourth gas refrigerant intake port 402e to the outer peripheral radial flow path portions 433a and 33a.
The rotor 400 according to the present embodiment is provided with an axial flow path portion 32 and a second axial flow path portion, and gas refrigerant also enters this portion, thereby cooling the rotor core. The

Also in the rotating electrical machine of the present embodiment, since the gaseous refrigerant is released from the outer peripheral portion of the rotor 400, the stator coil is cooled.
In the example of FIG. 10 of the rotor 400 of the present embodiment, the third gas refrigerant inlet 402d and the fourth gas refrigerant inlet 402e are not provided in the other fourth end plate 402a. Further, the outer peripheral side radial flow path portions 433 a and 33 a are provided on the other axial side of the fourth rotor core 403.
A rotary electric machine including the rotor 400 of the present embodiment is connected in series below the compressor with the outer peripheral radial flow path portions 433a and 33a of the rotor 400 on the lower side, and a low-pressure shell compressor When used, the lower half coil of the stator, which is relatively high in temperature, can be intensively cooled.

In the present embodiment, the outer peripheral radial flow channel 53a is provided on both surfaces of the fourth groove-forming magnetic plate 405a, but it may be only one surface.
In the rotor of the present embodiment, the fourth groove forming magnetic plate 405a is disposed on the other side in the axial direction of the fourth rotor core 403. The fourth groove forming magnetic plate 405a may be disposed in the region.
That is, you may provide outer peripheral side radial direction flow-path part 433a, 33a in all the parts in the axial direction of a 4th rotor core.
In the rotor of the present embodiment, the gas refrigerant intake in each end plate includes a position facing the axial flow path hole, a position facing the second axial flow path hole, and a magnet hole gap. What is necessary is just to install in at least 1 place or more of the position which opposes, and the position which opposes the 2nd magnet hole space | gap part.

In the rotor of the present embodiment, the axial flow paths of the gas refrigerant intake port 2a and the second gas refrigerant intake port 402c of the fourth end plates 402a and 402b, and the fourth rotor core 403, respectively. The portion 32 and the second axial flow path portion may not be provided.
Further, at least one of both end plates is provided at a position facing the third gas refrigerant inlet 402d and the second magnet hole gap 251b provided at a position facing the magnet hole gap 51b. 4 and the gas refrigerant intake port 402e may be provided. The third gas refrigerant inlet 402d and the fourth gas refrigerant inlet 402e provided in at least one of the both end plates may be holes or notches that expose all or part of the magnet hole gaps 51b and 251b. .
Further, when the magnet hole is not a divided magnet hole, the gas refrigerant intake provided in at least one of the both end plates may be only the third gas refrigerant intake 402d.

Embodiment 5. FIG.
FIG. 11 is a schematic view in which a half in the radial direction of the rotor according to the fifth embodiment of the present invention is taken as a cross section.
As shown in FIG. 11, the rotor 500 according to the present embodiment forms one pole with the fifth rotor core 503 and two pieces inserted into the split magnet insertion holes of the fifth rotor core 503. A permanent magnet 404, a fifth end plate 502 installed on each end face of the fifth rotor core 503, a through-hole provided in the center of the fifth rotor core 503, and a fifth end plate 502; And a shaft 1 which is inserted into a through hole provided in the center and fixes a fifth rotor core 503 and a fifth end plate 502.

The fifth rotor core 503, which is the rotor core of the rotor 500 of the present embodiment, is also formed by laminating magnetic plates, and all the magnetic plates are formed with the second groove of the second embodiment. The same as the magnetic plate 205a.
The fifth rotor core 503 is provided with a split magnet insertion hole penetrating in the axial direction, an axial flow path portion 32, a magnet insertion hole gap portion 31b, and a second magnet insertion hole gap portion. ing.
Further, the fifth rotor core 503 also includes an outer peripheral side radial flow path portion 33a, an inner peripheral side radial flow path portion 33b, a partition portion radial flow path portion, and a second inner peripheral radial flow direction. And a road portion.
The fifth end plate 502 of the present embodiment is the same as one fourth end plate 402b of the fourth embodiment provided with all the gas refrigerant intakes.

The rotating electrical machine of the present embodiment is the same as the rotating electrical machine of the first embodiment, except that the rotor 500 of the present embodiment is used as the rotor.
Next, a mechanism for cooling the permanent magnet 4 in the rotor 500 of the present embodiment will be described.
When the rotor 500 rotates, the gas refrigerant in the magnet insertion hole gap portion 31b is released to the outside of the rotor 500 through the outer peripheral radial flow path portion 33a as indicated by an arrow M by centrifugal force. The Then, since the pressure of the magnet insertion hole gap 31b decreases, the gaseous refrigerant flows into the magnet insertion hole gap 31b from the axial flow path portion 32 and the second magnet insertion hole gap.

  Further, as indicated by an arrow L, an external gaseous refrigerant is introduced from the gaseous refrigerant inlet 2 a into the axial flow path portion 32. Further, as indicated by an arrow N, an external gaseous refrigerant is taken into the magnet insertion hole gap 31b from the third gaseous refrigerant intake 402d. In addition, an external gaseous refrigerant is taken into the second magnet insertion hole gap from the fourth gaseous refrigerant intake 402e.

The fifth rotor 500 of the present embodiment includes a gas refrigerant inlet 2a, an axial flow passage portion 32, an inner peripheral radial flow passage portion 33b, a magnet insertion hole gap portion 31b, and an outer peripheral side. There is a flow path through which the gas refrigerant flows in order and is discharged to the outside through the radial flow path portion 33a.
In addition, the second gas refrigerant intake port 402c, the second inner peripheral side radial flow path, the partition radial direction flow path section and the second magnet insertion hole gap, the permanent magnet and the split magnet insertion hole There is a flow path through which the gas refrigerant flows in order through the gap, the magnet insertion hole gap portion 31b, and the outer peripheral radial flow path portion 33a.

Further, there is a flow path through which the gaseous refrigerant flows in order through the third gaseous refrigerant intake port 402d, the magnet insertion hole gap portion 31b, and the outer peripheral radial flow path portion 33a.
The fourth gas refrigerant intake port 402e, the second magnet insertion hole gap, the gap between the permanent magnet and the split magnet insertion hole, the magnet insertion hole gap 31b, and the outer peripheral radial flow path 33a. There is a flow path through which the gaseous refrigerant flows and is released to the outside.
That is, the fifth rotor 500 of the present embodiment cools the permanent magnet with four flow paths through which the gaseous refrigerant flows and discharges to the outside.

Since the fifth rotor 500 of the present embodiment has many flow paths through which a gaseous refrigerant flows, the ability to cool the permanent magnet is particularly great.
Further, since the gas refrigerant is discharged from the side surface in the entire axial direction of the rotor core, the ability to cool the stator coil is large.
In the rotor of the present embodiment, the second groove-forming magnetic plate 205a is used for all the magnetic plates of the fifth rotor core, but a partial region in the axial direction of the fifth rotor core. The second groove-forming magnetic plate 205a may be disposed in the middle.
In the rotor according to the present embodiment, the gas refrigerant intake port 2 a provided at a position facing the axial flow path hole 52 and a position facing the second axial flow path hole 252 on both end plates. 2nd gas refrigerant intake port 402c provided in the 3rd gas refrigerant intake port 402d provided in the position facing the magnet hole space | gap 51b, and 2nd magnet hole space | gap part 251b The fourth gas refrigerant intake port 402e provided at the position is provided, but these gas refrigerant intake ports may be provided on at least one end plate.

Embodiment 6 FIG.
FIG. 12 is a schematic cross-sectional view showing a compressor according to Embodiment 6 of the present invention.
As shown in FIG. 12, the compressor 180 of the present embodiment includes a case 181 serving as an exterior, a compression mechanism 182 installed in the case 181, and a motor 183 that is a rotating electrical machine.
The shaft of the rotor in the motor 183 is connected to the crankshaft of the compression mechanism 182, and the compression mechanism 182 is operated by driving the motor 183.
In the present embodiment, the rotating electrical machine according to any of Embodiments 1 to 5 is used for motor 183.

  The compressor 180 according to the present embodiment uses the rotating electric machine according to any of the first to fifth embodiments, and the permanent magnet and the stator coil of the rotating electric machine are efficiently cooled. The performance is excellent.

In the rotor of the present invention, the cross-sectional shape of the magnet insertion hole, each magnet insertion hole gap and each axial flow path, the shape of each gas refrigerant inlet, the outer circumferential radial flow path section and each inner circumferential radial direction The shape with the channel portion is an example, and is not limited to these shapes as long as the gas refrigerant can flow.
In addition, the configuration of the rotor is 6 poles, and 1 or 2 permanent magnets are used per 1 pole. However, 4 or 8 poles may be used, and 3 or more within a range that can be installed per 1 pole. It is also good. When a plurality of permanent magnets are used for one pole, the magnet insertion hole is divided by the partition portion corresponding to the number of permanent magnets, but the partition portion may not be provided in a rotating electrical machine having a low rotational speed.

Further, the cross section of the permanent magnet may be a semi-cylindrical shape or an arc shape, and the cross-sectional shape of the magnet insertion hole may be a shape corresponding to the cross-sectional shape of the permanent magnet.
Moreover, the method of processing each groove | channel of a magnetic board will not be limited to press work and an etching process, if a groove | channel can be formed.
The number of slots and the like of the stator of the present invention are not particularly limited, and the stator coil may be either concentrated winding or distributed winding.
The rotating electrical machine of the present invention can be used other than the compressor and has the same cooling effect.

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

  Since the rotor of the present invention can effectively cool the permanent magnet and the stator coil, the rotor is used in a rotating electric machine that requires high output and a compressor using the rotating electric machine.

1 shaft, 2 end plate, 2a gas refrigerant inlet, 3 rotor core, 4 permanent magnet,
5a Groove-forming magnetic plate, 5b Flat magnetic plate, 31b Magnet insertion hole gap,
32 axial flow path part, 33a outer circumference side radial flow path part, 33b inner circumference side radial flow path part,
45a connection part, 51 magnet hole, 51a magnet occupation part, 51b magnet hole space | gap part,
52 axial flow path holes, 53a outer peripheral side radial flow grooves, 53b inner peripheral side radial flow grooves,
54 shaft through-hole, 55 boundary, 56 outer bridge, 100 rotor,
120 stator, 121 stator core, 121a yoke part, 121b teeth part,
122 stator coil, 150 rotating electric machine, 180 compressor, 181 case,
182 compression mechanism, 183 motor, 205a second groove forming magnetic plate,
251 split magnet hole, 251a second magnet occupation part, 251b second magnet hole gap,
252 second axial flow path hole, 253b second inner circumferential radial flow path groove,
260 thin partition, 305a third groove forming magnetic plate, 400 rotor,
402a the other fourth end plate, 402b the other fourth end plate,
402c second gas refrigerant inlet, 402d third gas refrigerant inlet,
402e fourth gas refrigerant intake, 403 fourth rotor core, 404 permanent magnet,
405a fourth groove-forming magnetic plate, 405b fourth flat magnetic plate, 460 same-thickness partitioning part,
500 rotor, 502 fifth end plate, 503 fifth rotor core.

Claims (11)

A rotor core, a permanent magnet inserted into a magnet insertion hole of the rotor core, an end plate installed in contact with each end surface in the axial direction of the rotor core, the rotor core and the end A rotor that includes a shaft that is inserted into a through-hole provided in the center of each of the plates and that fixes the rotor core and the end plate,
A plurality of magnet holes provided in the circumferential direction at the outer peripheral side of the rotor core, and an axial flow path that is radially opposed to a portion between the adjacent magnet holes and provided on the inner side A magnetic plate having a hole and a shaft through hole provided in the center, and a circumferential end portion of the magnet hole being a magnet hole gap,
All or a part of the plurality of magnetic plates stacked is an outer peripheral radial flow channel connecting the gap between the magnet hole and the outer periphery of the magnetic plate, the axial flow channel hole, and the magnet hole. A groove-forming magnetic plate provided on the surface with an inner circumferential radial flow channel connecting the gap portion,
A rotor in which at least one of the end plates is provided with a gas refrigerant inlet at a position facing the axial flow path hole. A rotor core, a permanent magnet inserted into a magnet insertion hole of the rotor core, an end plate installed in contact with each end surface in the axial direction of the rotor core, the rotor core and the end A rotor that includes a shaft that is inserted into a through-hole provided in the center of each of the plates and that fixes the rotor core and the end plate,
The rotor core has a plurality of magnet holes provided in a circumferential direction at a position on the outer peripheral side, and a shaft through hole provided in the center, and a circumferential end of the magnet hole is a magnet hole. It is formed by laminating magnetic plates that are gaps,
All or part of the plurality of laminated magnetic plates is a groove-forming magnetic plate in which outer circumferential side radial flow grooves that connect the magnet hole gap and the outer periphery of the magnetic plate are provided on the surface. Yes,
A rotor in which at least one of the end plates is provided with a hole or a notch that exposes part or all of the magnet hole gap at a position facing the magnet hole gap and serves as a gas refrigerant intake. A rotor core, a permanent magnet inserted into a magnet insertion hole of the rotor core, an end plate installed in contact with each end surface in the axial direction of the rotor core, the rotor core and the end A rotor that includes a shaft that is inserted into a through-hole provided in the center of each of the plates and that fixes the rotor core and the end plate,
The rotor core is provided in a plurality in the circumferential direction at a position on the outer peripheral side and has a radially extending partition between the magnet hole having a partition extending in the radial direction and the adjacent magnet hole. And an axial passage hole provided on the inner side, a second axial passage hole provided on the inner side and opposed to the partition portion in the radial direction, and a shaft through hole provided in the center. And a magnetic plate in which a circumferential end of the magnet hole is a magnet hole gap, and a corner of the magnet hole on the partitioning part side is a second magnet hole gap. Is formed by laminating
All or a part of the plurality of magnetic plates stacked is an outer peripheral radial flow channel connecting the gap between the magnet hole and the outer periphery of the magnetic plate, the axial flow channel hole, and the magnet hole. An inner circumferential radial passage groove that connects the gap portion, a second inner circumferential radial direction that connects the second axial flow passage hole, the second magnet hole gap portion, and the partition portion. A groove-forming magnetic plate provided with a flow channel groove on the surface and the partition portion is thinned;
The rotor, wherein at least one of the end plates is provided with a gas refrigerant intake at each of a position facing the axial flow path hole and a position facing the second axial flow path hole. A rotor core, a permanent magnet inserted into a magnet insertion hole of the rotor core, an end plate installed in contact with each end surface in the axial direction of the rotor core, the rotor core and the end A rotor that includes a shaft that is inserted into a through-hole provided in the center of each of the plates and that fixes the rotor core and the end plate,
A plurality of the rotor cores are provided in the circumferential direction at a position on the outer peripheral side and have a magnet hole having a partition part extending in the radial direction, and are opposed to the partition part in the radial direction and provided inside. It has an axial flow path hole and a shaft through hole provided in the center, and the end in the circumferential direction of the magnet hole is a magnet hole gap, and the side of the magnet hole on the partition part side Are formed by laminating magnetic plates in which the corners are the second magnet hole gaps,
All or a part of the plurality of magnetic plates stacked is an outer peripheral radial flow channel connecting the gap between the magnet hole and the outer periphery of the magnetic plate, the axial flow channel hole, and the second flow channel. A groove-forming magnetic plate provided on the surface with a magnet hole gap and an inner peripheral radial flow channel connecting the partition, and the partition is thinned,
A rotor in which at least one of the end plates is provided with a gas refrigerant inlet at a position facing the axial flow path hole. A rotor core, a permanent magnet inserted into a magnet insertion hole of the rotor core, an end plate installed in contact with each end surface in the axial direction of the rotor core, the rotor core and the end A rotor that includes a shaft that is inserted into a through-hole provided in the center of each of the plates and that fixes the rotor core and the end plate,
The rotor core has a plurality of magnet holes provided in the circumferential direction at a position on the outer peripheral side and a partition portion extending in the radial direction, and a shaft through hole provided in the center, and the magnet The end of the hole in the circumferential direction is a magnet hole gap, and the magnetic hole is formed by laminating magnetic plates in which the corner of the magnet hole on the partitioning part side is the second magnet hole gap. And
All or part of the plurality of laminated magnetic plates is a groove-forming magnetic plate in which outer circumferential side radial flow grooves that connect the magnet hole gap and the outer periphery of the magnetic plate are provided on the surface. Yes,
At least one of the end plates in contact with the end face of the rotor core is provided with a gas refrigerant intake at each of a position facing the magnet hole gap and a position facing the second magnet hole gap. A rotor. A rotor core, a permanent magnet inserted into a magnet insertion hole of the rotor core, an end plate installed in contact with each end surface in the axial direction of the rotor core, the rotor core and the end A rotor that includes a shaft that is inserted into a through-hole provided in the center of each of the plates and that fixes the rotor core and the end plate,
The rotor core is provided in a plurality in the circumferential direction at a position on the outer peripheral side and has a radially extending partition between the magnet hole having a partition extending in the radial direction and the adjacent magnet hole. And an axial passage hole provided on the inner side, a second axial passage hole provided on the inner side and opposed to the partition portion in the radial direction, and a shaft through hole provided in the center. And a magnetic plate in which a circumferential end of the magnet hole is a magnet hole gap, and a corner of the magnet hole on the partitioning part side is a second magnet hole gap. Is formed by laminating
All or part of the plurality of laminated magnetic plates is a groove-forming magnetic plate in which outer circumferential side radial flow grooves that connect the magnet hole gap and the outer periphery of the magnetic plate are provided on the surface. Yes,
The position where the end plate faces the axial flow path hole, the position facing the second axial flow hole, the position facing the magnet hole gap, and the second magnet hole gap A rotor provided with a gas refrigerant intake at least at one or more positions. A rotor core, a permanent magnet inserted into a magnet insertion hole of the rotor core, an end plate installed in contact with each end surface in the axial direction of the rotor core, the rotor core and the end A rotor that includes a shaft that is inserted into a through-hole provided in the center of each of the plates and that fixes the rotor core and the end plate,
The rotor core is provided in a plurality in the circumferential direction at a position on the outer peripheral side and has a radially extending partition between the magnet hole having a partition extending in the radial direction and the adjacent magnet hole. And an axial passage hole provided on the inner side, a second axial passage hole provided on the inner side and opposed to the partition portion in the radial direction, and a shaft through hole provided in the center. And a magnetic plate in which a circumferential end of the magnet hole is a magnet hole gap, and a corner of the magnet hole on the partitioning part side is a second magnet hole gap. Is formed by laminating
All or a part of the plurality of magnetic plates stacked is an outer peripheral radial flow channel connecting the gap between the magnet hole and the outer periphery of the magnetic plate, the axial flow channel hole, and the magnet hole. An inner circumferential radial passage groove that connects the gap portion, a second inner circumferential radial direction that connects the second axial flow passage hole, the second magnet hole gap portion, and the partition portion. A groove-forming magnetic plate provided with a flow channel groove on the surface and the partition portion is thinned;
The position where at least one of the end plates is opposed to the axial flow path hole, the position opposed to the second axial flow path hole, the position opposed to the magnet hole gap portion, and the second magnet hole gap The rotor which has provided the gaseous refrigerant intake in each of the position which opposes a part. In the groove-forming magnetic plate, the ratio of the thickness of the outer peripheral radial flow groove to the thickness of the non-thinned portion is 50% to 70%, and the outer peripheral radial flow groove not thinned is The ratio of the radial width of the outer peripheral radial flow channel to the radial width of the portion to be formed is 100% to 150%. The rotor according to claim 6. In the groove-forming magnetic plate, the ratio of the thickness of the outer peripheral radial flow channel groove to the thickness of the non-thinned portion and the thickness of the thinned partition portion with respect to the thickness of the non-thinned portion At least one of the ratios is 50% to 70%, and the outer peripheral side radial flow channel with respect to the radial width of the portion where the outer peripheral side radial flow channel not thinned is formed in the groove-forming magnetic plate The ratio of the width in the radial direction and the ratio of the width in the circumferential direction of the thinned partition portion to the width in the circumferential direction of the partition portion not thinned is 100% to 150%. The rotor according to any one of claims 3, 4, and 7. A rotor according to any one of claims 1 to 9, and a stator disposed concentrically with a predetermined distance from the outer peripheral surface of the rotor,
The stator is formed of a stator iron core composed of a yoke part of an outer peripheral part and a tooth part protruding in a radial direction from an inner peripheral surface of the yoke part, and a stator coil wound around the tooth part. Rotating electric machine. A compressor comprising a case serving as an exterior, a compression mechanism installed in the case, and the rotating electrical machine according to claim 10, wherein the compression mechanism is driven by the rotating electrical machine.

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