JP2019170150A - Rotor of rotary electric machine - Google Patents

Abstract

To provide a rotor of a rotary electric machine capable of efficiently cooling a magnet from the inside of a rotary core.SOLUTION: A rotor 10 of a rotary electric machine includes a rotor core 30 and a rotor shaft 20 to be rotated integrally with the rotor core 30. The rotor shaft 20 includes a refrigerant passage 21 to which refrigerant is supplied and a refrigerant supply section 22 for supplying refrigerant to the rotor core 30. A plurality of magnet insertion holes 34 extended in the inside of the rotor core 30 in an axial direction and having magnets 41 respectively arranged in their insides, a cavity section 32, and a refrigerant distribution plate 80 are arranged in the rotor core 30. The refrigerant distribution plate 80 includes an accumulation section 120 communicated to the refrigerant supply section 22 to accumulate the refrigerant and a plurality of communication holes 91, 92, 93 for connecting the accumulation section 120 to the cavity section 32.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a rotary electric rotor mounted on an electric vehicle or the like.

  In recent years, in hybrid vehicles and EV vehicles in which a rotating electrical machine is used as a drive source, a temperature increase of a permanent magnet that greatly affects the performance of the rotating electrical machine has become a problem, and efficient cooling has become a problem. .

  The rotating electrical machine described in Patent Document 1 is configured to cool the rotor by supplying a coolant from a cooling oil supply pipe fixed to the case to the end face of the rotating end plate of the rotor.

Japanese Patent No. 5601504

  However, in the rotating electrical machine described in Patent Document 1, the rotor, particularly the permanent magnet that is problematic in terms of demagnetization due to temperature rise, is cooled through the end plates that cover both end faces of the rotor core, and thus the cooling efficiency is low. was there. In addition, the refrigerant supplied from the cooling oil supply pipe is scattered due to interference with the end plate, and the permanent magnets that require the most cooling are difficult to cool, and there is room for improvement.

  The present invention provides a rotor of a rotating electrical machine that can efficiently cool a magnet from the inside of a rotor core.

The first invention is
Rotor core,
A rotor of a rotating electrical machine comprising: a rotor shaft that rotates integrally with the rotor core;
In the rotor shaft,
A refrigerant flow path through which a refrigerant is supplied;
A refrigerant supply unit for supplying the refrigerant to the rotor core,
In the rotor core,
A plurality of magnet insertion holes extending in the axial direction inside the rotor core, each having a magnet disposed thereon,
An in-core flow path extending in the axial direction inside the rotor core;
A refrigerant distribution plate, and
The refrigerant distribution plate includes a storage section that communicates with the refrigerant supply section and stores the refrigerant, and a plurality of communication holes that connect the storage section and the in-core flow path.

The second invention is
Rotor core,
A plurality of magnets disposed inside the rotor core or on the outer surface of the rotor core;
A rotor of a rotating electrical machine comprising: a rotor shaft that rotates integrally with the rotor core;
In the rotor shaft,
A refrigerant flow path through which a refrigerant is supplied;
A refrigerant supply unit for supplying the refrigerant to the rotor core,
In the rotor core,
An in-core flow path extending in the axial direction inside the rotor core;
A refrigerant distribution plate, and
The refrigerant distribution plate includes a storage section that communicates with the refrigerant supply section and stores the refrigerant, and a plurality of communication holes that connect the storage section and the in-core flow path.

  According to the present invention, since the refrigerant is supplied from the rotor shaft to the core internal flow path through the storage portion and the communication hole formed by the refrigerant distribution plate, the magnet flows from the inside of the rotor core by the refrigerant flowing through the core internal flow path. It can be cooled efficiently.

It is a perspective view of the rotor of the rotary electric machine of 1st Embodiment. It is a cross-sectional perspective view of the rotor of the rotary electric machine of FIG. It is sectional drawing of the rotor of the rotary electric machine of FIG. It is a disassembled perspective view of the refrigerant distribution plate of FIG. It is the figure which looked at the 1st plate of the refrigerant distribution plate of Drawing 4 from the inside. It is the figure which looked at the 1st plate of the refrigerant distribution plate of Drawing 4 from the outside. It is a disassembled perspective view of the refrigerant distribution plate provided in the rotor of the rotary electric machine of 2nd Embodiment. It is the figure which looked at the 2nd plate of the refrigerant distribution plate of Drawing 6 from the inside. It is the figure which looked at the 2nd plate of the refrigerant distribution plate of Drawing 6 from the outside. It is the figure which looked at a part of 1st plate of a modification from the inner side. It is the figure which looked at a part of 1st plate of another modification from the inside. It is a disassembled perspective view of the refrigerant distribution plate provided in the rotor of the rotary electric machine of 3rd Embodiment of this invention. It is the figure which looked at the 2nd plate of the refrigerant distribution plate of Drawing 9 from the inside. It is the figure which looked at the 2nd plate of the refrigerant distribution plate of Drawing 9 from the outside. It is a cross-sectional perspective view of the rotor of the rotary electric machine of 4th Embodiment.

  Hereinafter, embodiments of a rotor of a rotating electrical machine according to the present invention will be described with reference to the accompanying drawings.

[First Embodiment]
First, the rotor of the rotary electric machine of 1st Embodiment of this invention is demonstrated, referring FIGS. 1-5B.

  As shown in FIGS. 1 to 3, the rotor 10 of the rotating electrical machine according to the present embodiment is disposed on the rotor shaft 20, the rotor core 30 that is pivotally supported by the rotor shaft 20, and one side in the axial direction of the rotor core 30. A first end plate 50, a second end plate 60 disposed on the other axial side of the rotor core 30, and a refrigerant distribution plate 80 interposed in the rotor core 30.

  The rotor shaft 20 is formed with a refrigerant channel 21 through which refrigerant flows. The refrigerant flow path 21 extends in the axial direction inside the rotor shaft 20, and is configured to be able to supply the refrigerant from the outside. As the refrigerant, for example, ATF (Automatic Transmission Fluid) is used, and a supply path is formed so that the ATF circulates between the transmission case and the motor housing.

  In the rotor shaft 20, a plurality of refrigerant supply portions 22 for sending the refrigerant from the refrigerant flow path 21 to the rotor core 30 side are formed in communication with the refrigerant flow path 21 at predetermined intervals in the circumferential direction. Further, a positioning portion 23 is formed at one end of the rotor shaft 20 (left end portion in FIG. 2).

  The rotor core 30 includes a pair of rotor core portions 30A and 30B formed by laminating a plurality of electromagnetic steel plates. A refrigerant distribution plate 80 is disposed at the axially central portion of the pair of rotor core portions 30A and 30B.

  The pair of rotor core portions 30A and 30B is formed with a rotor insertion hole 31 penetrating in the axial direction at the center thereof. The pair of rotor core portions 30A and 30B preferably have the same shape, and the thickness (axial length) thereof is preferably set to substantially the same thickness.

  In the rotor core 30, a plurality of cavities 32 are formed in the circumferential direction at predetermined intervals in the vicinity of the inner periphery of the rotor core 30 in order to allow the coolant to flow. The cavity 32 constitutes an in-core flow path 33 through which the refrigerant supplied from the refrigerant supply unit 22 passes. A plurality of magnet insertion holes 34 for embedding the magnets 41 are provided at predetermined intervals in the circumferential direction on the outer peripheral side of the cavity portion 32. The magnet insertion hole 34 is formed in a substantially V shape that opens toward the outer diameter side of the rotor core 30.

  The magnet 41 is a permanent magnet such as a neodymium magnet, for example, and the two magnets 41 arranged in the substantially V-shaped magnet insertion hole 34 constitute one magnetic pole portion 42. That is, the rotor 10 of this embodiment is a so-called IPM type rotating electrical machine (Interior Permanent Magnet Moror). In the embodiment shown in FIG. 2, eight magnetic pole portions 42 are formed on the rotor 10 of the rotating electrical machine.

  By embedding the two magnets 41 in the magnet insertion hole 34, a space portion sandwiched between the two magnets 41 serves as an inner flux barrier portion 37 in the magnet insertion hole 34, and the outer side of the two magnets 41 is outside. The space portions are the outer flux barrier portions 38, respectively. Here, the flux barrier portions 37 and 38 are space portions formed between the magnet insertion hole 34 and the inserted magnet 41, and may be partially filled with resin. The in-core flow path 33 includes flux barrier portions 37 and 38 provided in the magnet insertion hole 34 in addition to the cavity portion 32.

  As shown in FIGS. 2 to 5B, the refrigerant distribution plate 80 is a disk formed with the same outer diameter as the first end plate 50, the rotor core 30, and the second end plate 60, and a pair of rotor core portions 30 </ b> A. , 30 </ b> B, and is disposed in the axially central portion of the rotor core 30.

  The refrigerant distribution plate 80 is configured such that the first plate 81 and the second plate 82 are overlapped in the axial direction and the outer peripheral portion is joined by welding or the like. The refrigerant distribution plate 80 is preferably made of a material having a linear expansion coefficient substantially equal to that of the rotor core 30. By making the linear expansion coefficient of the rotor core 30 and the linear expansion coefficient of the refrigerant distribution plate 80 substantially equal, the difference in the amount of change due to thermal expansion between the rotor core 30 and the refrigerant distribution plate 80 can be suppressed. Deviations from communication holes 91 to 93 and 111 to 113 described later can be suppressed. “Substantially equal” means that the difference in linear expansion coefficient is 20% or less, and the difference in linear expansion coefficient is preferably 15% or less, and more preferably 12% or less.

  The refrigerant distribution plate 80 is preferably made of a nonmagnetic material and a nonconductive material, and more preferably made of a phenolic resin. By configuring the refrigerant distribution plate 80 from a nonmagnetic material and a nonconductive material, loss can be reduced. Moreover, the rotor distribution core 80 can be comprised from a general electromagnetic steel plate as a material of the rotor core 30 by comprising from the phenol-type resin whose linear expansion coefficient is substantially equal to iron.

  The first plate 81 includes a disk-shaped plate body 85 in which a rotor shaft hole 84 penetrating in the axial direction is formed at the center thereof. On one side surface (left side surface in FIG. 4) of the plate main body 85, as shown in FIG. 5A, a flange portion 86 extending in the axial direction from the outer peripheral edge is provided. Further, as shown in FIG. 5B, three ring-shaped grooves 87, 88, 89 are formed on the other side surface (the right side surface in FIG. 4) of the plate body 85 from the inner diameter side.

  Each of the ring-shaped grooves 87, 88, 89 is formed at a radial position corresponding to the cavity 32, the inner flux barrier 37, and the outer flux barrier 38 of the rotor core 30 (rotor core 30 </ b> A).

  A plurality of (four in the embodiment shown in FIG. 5B) first communication holes 91 are provided in the ring-shaped groove 87, and these first communication holes 91 are located at substantially the same diameter position from the center C of the rotor shaft hole 84 ( Radius R1) and penetrate the plate body 85 in the axial direction at equal intervals in the circumferential direction. A plurality of (four in the embodiment shown in FIG. 5B) inner diameter side second communication holes 92 are provided in the ring-shaped groove 88, and these inner diameter side second communication holes 92 are substantially the same from the center C of the rotor shaft hole 84. The plate body 85 is penetrated in the axial direction at a radial position (radius R2) and at equal intervals in the circumferential direction. A plurality (four in the embodiment shown in FIG. 5B) of outer diameter side second communication holes 93 are provided in the ring-shaped groove 89, and these outer diameter side second communication holes 93 are the center of the rotor shaft hole 84. The plate main body 85 is penetrated in the axial direction at substantially the same diameter position (radius R3) from C at equal intervals in the circumferential direction. The circumferential phases of the first communication hole 91, the inner diameter side second communication hole 92, and the outer diameter side second communication hole 93 are different from each other.

  Thus, the first communication hole 91 communicates with the cavity 32 of the rotor core portion 30A via the ring-shaped groove 87, and the inner diameter side second communication hole 92 communicates with the inner flux barrier portion of the rotor core portion 30A via the ring-shaped groove 88. 37, the outer diameter side second communication hole 93 communicates with the outer flux barrier portion 38 of the rotor core portion 30 </ b> A via the ring-shaped groove 89.

  The plurality of first communication holes 91 have the same hole diameter, the plurality of inner diameter side second communication holes 92 have the same hole diameter, and the plurality of outer diameter side second communication holes 93 also have the same hole diameter.

  As shown in FIGS. 3 and 4, the second plate 82 has the same shape as the first plate 81, and a disk-shaped plate body in which a rotor shaft hole 104 penetrating in the axial direction is formed at the center thereof. 105.

  On the other side surface (the right side surface in FIG. 4) of the plate body 105, a ring-shaped convex portion 106 protruding in the axial direction is provided on the outer diameter side. The outer diameter of the ring-shaped convex portion 106 is slightly smaller than the inner diameter of the flange portion 86 of the first plate 81, and the ring-shaped convex portion 106 can be fitted into the flange portion 86.

  Further, three ring-shaped grooves 107, 108, and 109 are formed on one side surface (left side surface in FIG. 4) of the plate body 105 from the inner diameter side. Each of the ring-shaped grooves 107, 108, 109 is formed at a radial position corresponding to the cavity 32, the inner flux barrier 37, and the outer flux barrier 38 of the rotor core 30 (rotor core 30B).

  A plurality of (four in the embodiment shown in FIG. 4) first communication holes 111 are provided in the ring-shaped groove 107, and these first communication holes 111 are located at substantially the same diameter position from the center C of the rotor shaft hole 104 ( Radius R1) and penetrate the plate body 105 in the axial direction at equal intervals in the circumferential direction. A plurality (four in the embodiment shown in FIG. 4) of inner diameter side second communication holes 112 are provided in the ring-shaped groove 108, and these inner diameter side second communication holes 112 are substantially the same from the center C of the rotor shaft hole 104. The plate body 105 is penetrated in the axial direction at a radial position (radius R2) and at equal intervals in the circumferential direction. Further, a plurality (four in the embodiment shown in FIG. 4) of outer diameter side second communication holes 113 are provided in the ring-shaped groove 109, and these outer diameter side second communication holes 113 are the centers of the rotor shaft holes 104. The plate main body 105 is penetrated in the axial direction at substantially the same diameter position (radius R3) from C and at equal intervals in the circumferential direction. The circumferential phases of the first communication hole 111, the inner diameter side second communication hole 112, and the outer diameter side second communication hole 113 are different from each other.

  Accordingly, the first communication hole 111 communicates with the cavity 32 of the rotor core portion 30B via the ring-shaped groove 107, and the inner diameter side second communication hole 112 communicates with the inner flux barrier portion of the rotor core portion 30B via the ring-shaped groove 108. 37, the outer diameter side second communication hole 113 communicates with the outer flux barrier portion 38 of the rotor core portion 30 </ b> B via the ring-shaped groove 109.

  The plurality of first communication holes 111 have the same hole diameter, the plurality of inner diameter side second communication holes 112 have the same hole diameter, and the plurality of outer diameter side second communication holes 113 also have the same hole diameter.

  The first plate 81 and the second plate 82 formed in this way are overlapped by fitting the ring-shaped convex portion 106 of the second plate 82 on the flange portion 86 of the first plate 81, and welding the joint 115. To join. Thereby, the storage part 120 which is a disk-shaped space is formed between the disk-shaped plate main bodies 85 and 105. The capacity of the storage part 120 can be easily changed by the height of the flange part 86 and the ring-shaped convex part 106.

  As shown in FIGS. 1 to 3, rotor shaft holes 51 and 61 are formed at the center of the first end plate 50 and the second end plate 60 that are disposed at both ends with the rotor core 30 interposed therebetween.

  A plurality of plate channels 52 are formed on the side surface of the first end plate 50 on the rotor core portion 30A side, and a plurality of plate channels 62 are formed on the side surface of the second end plate 60 on the rotor core portion 30B side. Has been. The plate channels 52 and 62 are provided with openings 53 and 63 that open in the outer diameter direction on the outer periphery thereof. The openings 53 and 63 are opposed to a coil end of a stator (not shown).

  The plate channel 52 communicates with the cavity 32 and the magnet insertion hole 34 of the rotor core 30A, and the plate channel 62 communicates with the cavity 32 and the magnet insertion hole 34 of the rotor core 30B.

  In the rotor 10 of the rotating electrical machine, the refrigerant distribution plate 80 is sandwiched between the pair of rotor core portions 30A and 30B, and the first end plate 50 and the second end plate 60 are disposed on both axial sides of the rotor core 30. , The rotor shaft hole 61 of the second end plate 60, the rotor insertion hole 31 of the rotor core 30B, the rotor shaft holes 84 and 104 of the refrigerant distribution plate 80 (first and second plates 81 and 82), and the rotor insertion of the rotor core 30A. The rotor shaft 20 is inserted and assembled into the hole 31 and the rotor shaft hole 51 of the first end plate 50. Thereby, the storage part 120 of the refrigerant distribution plate 80 communicates with the refrigerant supply part 22 of the rotor shaft 20. Further, the second end plate 60 contacts the positioning portion 23 of the rotor shaft 20.

  Next, the cooling action of the rotor core 30, particularly the magnet 41, will be described with reference to FIGS. The refrigerant is pumped to the refrigerant flow path 21 of the rotor shaft 20 by a refrigerant pump (not shown), and further, the storage part of the refrigerant distribution plate 80 located between the rotor core parts 30A and 30B from the refrigerant flow path 21 via the refrigerant supply part 22. 120.

  The refrigerant supplied to the storage unit 120 is supplied from the first communication hole 91 of the first plate 81 to the cavity portion 32 (in-core flow path 33) of the rotor core portion 30A through the ring-shaped groove 87, and the first It is supplied from the inner diameter side second communication hole 92 of the plate 81 to the inner flux barrier portion 37 (core flow path 33) of the rotor core portion 30A via the ring-shaped groove 88, and further the second outer diameter side second of the first plate 81. It is supplied from the communication hole 93 through the ring-shaped groove 89 to the outer flux barrier part 38 (intra-core flow path 33) of the rotor core part 30A.

  The refrigerant flowing in the axial direction through the cavity portion 32, the inner flux barrier portion 37, and the outer flux barrier portion 38 of the rotor core portion 30A indirectly and directly cools the magnet 41, and then enters the plate channel 52 of the first end plate 50. It flows out and is discharged radially outward from the opening 53 by centrifugal force to cool a coil end of a stator (not shown).

  Further, similarly to the first plate 81, the refrigerant supplied to the storage unit 120 passes from the first communication hole 111 of the second plate 82 through the ring-shaped groove 107 to the cavity portion 32 (in-core flow path) of the rotor core portion 30 </ b> B. 33), and is supplied from the inner diameter side second communication hole 112 of the second plate 82 to the inner flux barrier part 37 (intra-core flow path 33) of the rotor core part 30B through the ring-shaped groove 108, and The second plate 82 is supplied from the outer diameter side second communication hole 113 through the ring-shaped groove 109 to the outer flux barrier section 38 (intra-core flow path 33) of the rotor core section 30B.

  Then, the refrigerant flowing in the axial direction through the hollow portion 32, the inner flux barrier portion 37, and the outer flux barrier portion 38 of the rotor core portion 30B cools the magnet 41 indirectly and directly, and then the plate flow path of the second end plate 60 It flows out to 62 and is discharged radially outward from the opening 63 by centrifugal force to cool a coil end of a stator (not shown).

  Thereby, the performance of the rotating electrical machine is seriously affected, and the magnet 41 requiring the most cooling can be effectively cooled from the inside of the rotor core 30, and the performance degradation of the rotating electrical machine due to the temperature rise of the magnet 41 is prevented. Is done.

  The plurality of first communication holes 91, 111, the plurality of inner diameter side second communication holes 92, 112, and the plurality of outer diameter side second communication holes 93, 113 each have the same hole diameter, and are circumferential. In other words, the refrigerant is equally supplied from the reservoir 120 in the circumferential direction.

[Second Embodiment]
Next, the rotor 10 of the rotating electrical machine according to the second embodiment of the present invention will be described with reference to FIGS. 6 to 7B. The rotor 10 of the rotating electrical machine of the second embodiment is different from the rotor 10 of the rotating electrical machine of the first embodiment except for the refrigerant distribution plate 80, and the other configurations are the same. Therefore, the refrigerant distribution plate 80 will be mainly described. The same components as those of the rotor 10 of the rotating electrical machine according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.

  As shown in FIG. 6, the refrigerant distribution plate 80 of the present embodiment is similar to the refrigerant distribution plate 80 of the first embodiment, in which the first plate 81 and the second plate 82 are overlapped in the axial direction, and the joint 115 is formed. It is constructed by joining by welding.

  As shown in FIG. 6, on one side surface (left side surface in FIG. 6) of the plate body 85 of the first plate 81, the first communication hole 91 and the inner diameter side second communication hole 92 are radially outward. A refrigerant guide 94 is provided. The refrigerant guide 94 is a substantially arc-shaped protruding portion that protrudes in the axial direction from the inner surface of the plate body 85 and extends in the circumferential direction, and extends radially outside the first communication hole 91 and the inner diameter side second communication hole 92. It is formed to surround.

  Also on the other side surface (the right side surface in FIG. 6) of the plate body 105 of the second plate 82, as shown in FIGS. 7A and 7B, the first communication hole 111 and the radially inner side second communication hole 112 are radially outer. Each is provided with a refrigerant guide. The refrigerant guide is a substantially arc-shaped protrusion that protrudes in the axial direction from the inner surface of the plate body 105 and extends in the circumferential direction, and surrounds the first communication hole 111 and the radially outer side of the second communication hole 112 on the inner diameter side. It is formed as follows.

  According to the refrigerant distribution plate 80 of the present embodiment, when centrifugal force acts on the refrigerant stored in the storage unit 120, the refrigerant flows radially outward, but the refrigerant guide 94 hinders the flow of the refrigerant radially outward. Then, the first communication holes 91 and 111 and the inner diameter side second communication holes 92 and 112 are guided. The outer diameter side second communication holes 93 and 113 are guided by the ring-shaped convex portion 106. Thereby, a refrigerant | coolant can be appropriately distributed to each part and a cooling performance improves. Moreover, the supply amount of the refrigerant can be secured even in the low rotation region where the centrifugal force is small.

  The shape of the coolant guide 94 can be set to any shape as long as the coolant can be guided to the communication hole. The refrigerant guide 94B of the modification shown in FIG. 8A is formed as an arcuate protrusion having a small curvature radius. Moreover, the refrigerant guide 94C of another modification shown in FIG. 8B is formed as a V-shaped protrusion that opens toward the inner diameter side.

  According to the refrigerant guides 94B and 94C of the modified example, the refrigerant received by the refrigerant guides 94B and 94C can be reliably guided to the first communication holes 91 and 111. 8A and 8B show an example in which the refrigerant guides 94B and 94C are arranged radially outward of the first communication hole 91, but further radially outward of the inner diameter side second communication holes 92 and 112. It is also possible to arrange the refrigerant guides 94B and 94C.

[Third Embodiment]
Next, the rotor 10 of the rotating electrical machine according to the third embodiment of the present invention will be described with reference to FIGS. 9 to 10B. Note that the rotor 10 of the rotating electrical machine of the third embodiment has the first communication holes 91 and 111, the inner diameter side second communication holes 92 and 112, and the outer diameter side second communication holes 93 and 113 of the refrigerant distribution plate 80. However, unlike the rotor 10 of the rotating electrical machine of the first embodiment, the other components are the same, and thus the same components as those of the rotor 10 of the rotating electrical machine of the first embodiment are denoted by the same reference numerals and description thereof is omitted. Or simplify.

  In the refrigerant distribution plate 80 of the present embodiment, the first communication holes 91 and 111, the inner diameter side second communication holes 92 and 112, and the outer diameter side second communication holes 93 and 113 are different from each other. Specifically, the hole diameters become smaller in the order of the first communication holes 91 and 111, the inner diameter side second communication holes 92 and 112, and the outer diameter side second communication holes 93 and 113.

  When the rotor 10 of the rotating electrical machine rotates, a centrifugal force acts on the refrigerant stored in the storage unit 120, the pressure of the refrigerant in the region having a large radius from the center C of the rotor shaft 20 increases, and the supply amount of the refrigerant also increases. There is a tendency to increase on the outer diameter side. However, the first communication holes 91 and 111, the inner diameter side second communication holes 92 and 112, and the outer diameter side second communication holes 93 gradually from the inner diameter side to the outer diameter side of the first and second plates 81 and 82, By reducing the hole diameter of 113, the amount of refrigerant supplied to each part can be made substantially the same, and cooling can be performed uniformly. Moreover, if the hole diameters of the first communication holes 91 and 111, the inner diameter side second communication holes 92 and 112, and the outer diameter side second communication holes 93 and 113 are set to different hole diameters, the amount of refrigerant supplied to each part can be arbitrarily set. Can be controlled.

[Fourth Embodiment]
Subsequently, a rotor 10 of a rotating electrical machine according to a fourth embodiment of the present invention will be described with reference to FIG. The rotor 10 of the rotating electrical machine of the fourth embodiment has the same magnet arrangement as the rotor 10 of the rotating electrical machine of the first embodiment, and the other configurations are the same. Constituent elements are denoted by the same reference numerals, and description thereof is omitted or simplified. Note that the refrigerant distribution plate 80 of the first to third embodiments can be used as the refrigerant distribution plate 80 of the rotor 10 of the rotating electrical machine of the fourth embodiment.

  The rotor 10 of this embodiment is a so-called SPM type rotating electrical machine (Surface Permanent Magnet Moror) in which a magnet 41 is disposed on the surface of a rotor core 30. The magnet 41 is disposed in a groove provided on the surface of the rotor core 30 and is set so that the outer diameter of the rotor core 30 on which the magnet 41 is disposed and the outer diameter of the refrigerant distribution plate 80 are substantially the same. A filament winding layer 40 in which fibers impregnated with resin are wound is provided on the outer peripheral surfaces of the rotor core 30 and the refrigerant distribution plate 80 to prevent the magnet 41 from coming off the groove.

  Similarly to the first embodiment, the refrigerant distribution plate 80 of the present embodiment is preferably made of a material having a linear expansion coefficient substantially equal to the linear expansion coefficient of the rotor core 30. By making the linear expansion coefficient of the rotor core 30 and the linear expansion coefficient of the refrigerant distribution plate 80 substantially equal, the difference in the outer diameter change due to the thermal expansion between the rotor core 30 and the refrigerant distribution plate 80 can be suppressed, and the filament winding layer 40 Generation of shearing force can be suppressed. “Substantially equal” means that the difference in linear expansion coefficient is 20% or less, and the difference in linear expansion coefficient is preferably 15% or less, and more preferably 12% or less.

  The refrigerant distribution plate 80 is preferably made of a non-magnetic material and a non-conductive material, and more preferably made of a phenol-based resin, as in the first embodiment.

  It should be noted that the above-described embodiment can be modified, improved, etc. as appropriate. For example, in each of the above-described embodiments, the refrigerant distribution plate 80 has been described as being disposed at the central portion in the axial direction of the rotor core 30, but is not limited to the central portion in the axial direction, and is disposed, for example, on any one side surface of the rotor core 30. You can also. In this case, the rotor core 30 is formed as a rotor core 30 in which the rotor core portions 30A and 30B are integrated.

  In addition, at least the following matters are described in this specification. In addition, although the component etc. which respond | correspond in the above-mentioned embodiment are shown in a parenthesis, it is not limited to this.

(1) a rotor core (rotor core 30);
A rotor of a rotating electrical machine (rotor 10 of the rotating electrical machine) comprising a rotor shaft (rotor shaft 20) that rotates integrally with the rotor core,
In the rotor shaft,
A refrigerant channel (refrigerant channel 21) to which a refrigerant is supplied;
A refrigerant supply unit (refrigerant supply unit 22) for supplying the refrigerant to the rotor core,
In the rotor core,
A plurality of magnet insertion holes (magnet insertion holes 34) each extending in the axial direction inside the rotor core and having magnets (magnets 41) disposed therein,
An in-core flow path (cavity portion 32) extending in the axial direction inside the rotor core;
A refrigerant distribution plate (refrigerant distribution plate 80),
The refrigerant distribution plate communicates with the refrigerant supply unit to store the refrigerant (storage unit 120), and a plurality of communication holes (first communication hole 91) connecting the storage unit and the in-core flow path. , 111, inner diameter side second communication holes 92, 112, and outer diameter side second communication holes 93, 113).

  According to (1), since the refrigerant is supplied from the rotor shaft to the in-core channel through the storage portion and the communication hole formed by the refrigerant distribution plate, the magnet flows from the inside of the rotor core by the refrigerant flowing through the in-core channel. Can be efficiently cooled.

(2) The rotor of the rotating electrical machine according to (1),
The plurality of communication holes are arranged at substantially the same diameter position from the axis (center C) of the rotor shaft, and are connected to the plurality of first communication holes (first communication holes 91 and 111) communicating with the flow path in the core. A plurality of second communication holes (inner diameter side second communication holes 92 and 112, and outer diameter side second communication holes 93, which are arranged on the outer diameter side of the plurality of first communication holes and communicate with the magnet insertion hole. 113).

  According to (2), the rotor core can be cooled by supplying the refrigerant to the in-core flow path through the plurality of first communication holes. Moreover, a magnet can be directly cooled by supplying a refrigerant | coolant to a magnet insertion hole through several 2nd communicating hole.

(3) The rotating electrical machine rotor according to (2),
The plurality of first communication holes are provided at equal intervals in the circumferential direction,
The plurality of second communication holes are rotors of a rotating electrical machine provided at equal intervals in the circumferential direction.

  According to (3), since the first communication hole and the second communication hole are provided at equal intervals in the circumferential direction, the refrigerant can be supplied uniformly in the circumferential direction.

(4) The rotor of the rotating electrical machine according to (2) or (3),
The plurality of first communication holes have the same hole diameter,
The plurality of second communication holes are rotors of a rotating electrical machine having the same hole diameter.

  According to (4), since the first communication hole and the second communication hole have the same hole diameter, the refrigerant can be supplied more evenly in the circumferential direction.

(5) The rotating electrical machine rotor according to (4),
A rotor of a rotating electrical machine, wherein a hole diameter of the plurality of first communication holes is different from a hole diameter of the plurality of second communication holes.

  According to (5), the flow rate in the radial direction can be made different by making the hole diameter of the first communication hole different from the hole diameter of the second communication hole.

(6) The rotor of the rotating electrical machine according to (5),
The rotor of a rotating electrical machine, wherein a hole diameter of the plurality of first communication holes is larger than a hole diameter of the plurality of second communication holes.

  According to (6), the diameter of the first communication hole located on the inner diameter side is made larger than the hole diameter of the second communication hole located on the outer diameter side, so that the first communication hole is applied even if centrifugal force acts. The flow rate to can be secured.

(7) The rotor of the rotating electrical machine according to any one of (1) to (6),
The refrigerant distribution plate further includes a refrigerant guide (refrigerant guides 94, 94B, 94C) that bulges from an inner surface forming the storage portion and extends in a circumferential direction outside the plurality of communication holes in a radial direction. Electric rotor.

  According to (7), when centrifugal force acts on the refrigerant stored in the storage part, the refrigerant flows radially outward, but the refrigerant swells from the inner surface forming the storage part and extends in the circumferential direction. The flow to the outside in the radial direction is inhibited, and the refrigerant is guided to the communication hole.

(8) The rotor of the rotating electrical machine according to any one of (1) to (7),
The refrigerant distribution plate includes a disk-shaped first plate (first plate 81) and a second plate (second plate 82),
The first plate and the second plate include a plate main body (plate main bodies 85 and 105) arranged to face each other with a gap serving as the storage section, and a joint provided on the outer edge of the plate main body and joined to each other. (Joint portion 115).

  According to (8), the volume of the reservoir can be easily adjusted by configuring the refrigerant distribution plate with two plates.

(9) The rotating electrical machine rotor according to any one of (1) to (8),
A pair of end plates (first end plate 50, second end plate 60) are provided at both ends of the rotor core,
The pair of end plates are formed with plate flow paths (plate flow paths 52 and 62) having one end connected to the flow path in the core and the other end opposed to the coil end (coil end) of the stator. The rotor of a rotating electrical machine.

  According to (9), the pair of end plates disposed at both ends of the rotor core have plate flow paths having one end connected to the core internal flow path and the other end opposed to the coil end of the stator. Since it is formed, even if eccentricity occurs in the rotor shaft, the refrigerant is discharged from any of the plate flow paths. This prevents the refrigerant from remaining in the in-core flow path. Moreover, since the other end part of a plate flow path opposes the coil end of a stator, the coil of a stator can be cooled with a magnet.

(10) The rotor of the rotating electrical machine according to any one of (1) to (9),
The refrigerant distribution plate is a rotor of a rotating electrical machine that is disposed in a central portion in the axial direction of the rotor core.

  According to (10), since the refrigerant distribution plate is arranged in the central part in the axial direction of the rotor core, the refrigerant can be positively supplied to the central part in the axial direction of the rotor core that is likely to become the highest temperature.

(11) a rotor core (rotor core 30);
A plurality of magnets (magnets 41) arranged inside the rotor core or on the outer surface of the rotor core;
A rotor of a rotating electrical machine (rotor 10 of the rotating electrical machine) comprising a rotor shaft (rotor shaft 20) that rotates integrally with the rotor core,
In the rotor shaft,
A refrigerant channel (refrigerant channel 21) to which a refrigerant is supplied;
A refrigerant supply unit (refrigerant supply unit 22) for supplying the refrigerant to the rotor core,
In the rotor core,
An in-core flow path (cavity portion 32) extending in the axial direction inside the rotor core;
A refrigerant distribution plate (refrigerant distribution plate 80),
The refrigerant distribution plate communicates with the refrigerant supply unit to store the refrigerant (storage unit 120), and a plurality of communication holes (first communication hole 91) connecting the storage unit and the in-core flow path. , 111, inner diameter side second communication holes 92, 112, and outer diameter side second communication holes 93, 113).

  According to (11), since the refrigerant is supplied from the rotor shaft to the in-core channel through the storage portion and the communication hole formed by the refrigerant distribution plate, the magnet flows from the inside of the rotor core by the refrigerant flowing through the in-core channel. Can be efficiently cooled.

(12) The rotating electrical machine rotor according to (11),
A rotor of a rotating electrical machine in which a linear expansion coefficient of the rotor core and a linear expansion coefficient of the refrigerant distribution plate are substantially equal.

  According to (12), since the linear expansion coefficient of the rotor core and the linear expansion coefficient of the refrigerant distribution plate are substantially equal, the difference in variation due to thermal expansion can be suppressed between the rotor core and the refrigerant distribution plate. Deviation from the communication hole can be suppressed. Further, the amount of change in the outer diameter can be made substantially equal, and even when the filament winding layer is formed on the outer peripheral surface of the rotor core, it is possible to suppress the occurrence of shearing force in the filament winding layer.

(13) The rotating electrical machine rotor according to (12),
The said refrigerant distribution plate is a rotor of a rotary electric machine comprised from the nonmagnetic material and the nonelectroconductive material.

  According to (13), the loss can be reduced by configuring the refrigerant distribution plate from a non-magnetic material and a non-conductive material.

(14) The rotating electrical machine rotor according to (12) or (13),
The refrigerant distribution plate is a rotor of a rotating electrical machine made of phenol resin.

  According to (14), by configuring the refrigerant distribution plate from a phenol-based resin having a linear expansion coefficient substantially equal to that of iron, the rotor core can be configured from a general electromagnetic steel plate as a material for the rotor core.

DESCRIPTION OF SYMBOLS 10 Rotating electrical machine rotor 20 Rotor shaft 21 Refrigerant flow path 22 Refrigerant supply part 30 Rotor core 32 Cavity part 33 In-core flow path 34 Magnet insertion hole 37 Inner flux barrier part 38 Outer flux barrier part 41 Magnet 50 First end plate (end plate) )
52, 62 Plate channel 60 Second end plate (End plate 80 Refrigerant distribution plate 81 First plate 82 Second plate 85, 105 Plate body 91, 111 First communication hole (communication hole)
92, 112 Inner diameter side second communication hole (communication hole, second communication hole)
93, 113 Outer diameter side second communication hole (communication hole, second communication hole)
94, 94B, 94C Refrigerant guide 115 Joint 120 Storage section

Claims (14)

Rotor core,
A rotor of a rotating electrical machine comprising: a rotor shaft that rotates integrally with the rotor core;
In the rotor shaft,
A refrigerant flow path through which a refrigerant is supplied;
A refrigerant supply unit for supplying the refrigerant to the rotor core,
In the rotor core,
A plurality of magnet insertion holes extending in the axial direction inside the rotor core, each having a magnet disposed thereon,
An in-core flow path extending in the axial direction inside the rotor core;
A refrigerant distribution plate, and
The refrigerant distribution plate is a rotor of a rotating electrical machine having a storage part that communicates with the refrigerant supply part and stores the refrigerant, and a plurality of communication holes that connect the storage part and the flow path in the core. The rotor of the rotating electrical machine according to claim 1,
The plurality of communication holes are disposed at substantially the same diameter position from the axis of the rotor shaft, and are formed on the outer diameter side of the plurality of first communication holes and the plurality of first communication holes. A rotor of a rotating electrical machine including a plurality of second communication holes that are arranged and communicate with the magnet insertion holes. The rotor of the rotating electrical machine according to claim 2,
The plurality of first communication holes are provided at equal intervals in the circumferential direction,
The plurality of second communication holes are rotors of a rotating electrical machine provided at equal intervals in the circumferential direction. A rotor for a rotating electrical machine according to claim 2 or 3,
The plurality of first communication holes have the same hole diameter,
The plurality of second communication holes are rotors of a rotating electrical machine having the same hole diameter. The rotor of the rotating electrical machine according to claim 4,
A rotor of a rotating electrical machine, wherein a hole diameter of the plurality of first communication holes is different from a hole diameter of the plurality of second communication holes. The rotor of the rotating electrical machine according to claim 5,
The rotor of a rotating electrical machine, wherein a hole diameter of the plurality of first communication holes is larger than a hole diameter of the plurality of second communication holes. It is a rotor of the rotary electric machine of any one of Claims 1-6,
The rotor of a rotating electrical machine, wherein the refrigerant distribution plate further includes a refrigerant guide that bulges from an inner surface forming the storage portion and extends in a circumferential direction on a radially outer side of the plurality of communication holes. A rotor for a rotating electrical machine according to any one of claims 1 to 7,
The refrigerant distribution plate is composed of a disk-shaped first plate and a second plate,
The first plate and the second plate each have a plate main body disposed opposite to each other via a gap serving as the storage portion, and a joint provided at an outer edge of the plate main body and joined to each other. Electric rotor. A rotor for a rotating electrical machine according to any one of claims 1 to 8,
A pair of end plates are provided at both ends of the rotor core,
A rotor of a rotating electrical machine, wherein one end of the pair of end plates is connected to the in-core flow path, and the other end of the pair of end plates is opposed to a coil end of the stator. A rotor for a rotating electrical machine according to any one of claims 1 to 9,
The refrigerant distribution plate is a rotor of a rotating electrical machine that is disposed in a central portion in the axial direction of the rotor core. Rotor core,
A plurality of magnets disposed inside the rotor core or on the outer surface of the rotor core;
A rotor of a rotating electrical machine comprising: a rotor shaft that rotates integrally with the rotor core;
In the rotor shaft,
A refrigerant flow path through which a refrigerant is supplied;
A refrigerant supply unit for supplying the refrigerant to the rotor core,
In the rotor core,
An in-core flow path extending in the axial direction inside the rotor core;
A refrigerant distribution plate, and
The refrigerant distribution plate is a rotor of a rotating electrical machine having a storage part that communicates with the refrigerant supply part and stores the refrigerant, and a plurality of communication holes that connect the storage part and the flow path in the core. The rotor of the rotating electrical machine according to claim 11,
A rotor of a rotating electrical machine in which a linear expansion coefficient of the rotor core and a linear expansion coefficient of the refrigerant distribution plate are substantially equal. The rotor of the rotating electrical machine according to claim 12,
The said refrigerant distribution plate is a rotor of a rotary electric machine comprised from the nonmagnetic material and the nonelectroconductive material. A rotor for a rotating electrical machine according to claim 12 or 13,
The refrigerant distribution plate is a rotor of a rotating electrical machine made of phenol resin.

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