JP6451517B2 - Rotor - Google Patents

Description

  The present invention relates to a rotor used in a rotating electrical machine.

  A rotor including a cylindrical rotor core having a magnet accommodation hole and a magnet accommodated in the magnet accommodation hole is known. For example, Patent Document 1 discloses an embedded magnet type rotor having a Halbach array magnet. The Halbach array magnet includes a plurality of types of magnets having different magnetization directions, and concentrates the magnetic flux at the center of the magnetic pole to increase the amount of magnetic flux. In the embedded magnet type rotor, a cover for covering the outer periphery of the magnet is not required.

JP 2009-261167 A

  In the interior magnet type rotor disclosed in Patent Document 1, some of the plurality of magnet housing holes are defined by ribs extending from the inside to the outside in the radial direction. Further, in some of the magnet housing holes defined by the ribs, radially magnetized magnets that are magnets that are rectangular in cross section and magnetized in the radial direction are housed. Although the radially magnetized magnet is magnetically attracted to one of the inner wall surfaces of the magnet housing hole in the radial direction, the circumferential position is not fixed. For this reason, the width of the circumferential gap between the rib and the radially magnetized magnet cannot be managed so as to be kept above a certain value.

Therefore, when the rib that receives torque during the rotation of the rotor bends and deforms, stress concentrates locally at the contact location due to the rib coming into contact with the radially inner corner of the radially magnetized magnet. The ribs may be damaged.
The present invention has been made in view of the above-described points, and an object thereof is to provide a rotor capable of suppressing breakage of a rib of a rotor core.

The present invention is a rotor used in a rotating electrical machine, and includes a cylindrical rotor core having a plurality of magnet housing holes and a plurality of magnets housed in the magnet housing holes.
Here, among the plurality of magnet housing holes, a hole defined by a rib extending from the inside to the outside in the radial direction is defined as a specific housing hole. Of the plurality of magnets, a magnet accommodated in the specific accommodation hole and magnetized in the radial direction of the rotor core is defined as a specific magnet. In the present invention, the circumferential interval between the rib and the radially inner corner of the specific magnet is larger than the circumferential interval between the rib and the radially outer corner of the specific magnet.
In the first aspect of the present invention, of the outer wall surfaces of the specific magnet, a surface located on one side in the circumferential direction is defined as a first side surface, and a surface located on the other circumferential side is defined as a second side surface. Of the inner wall surface of the specific accommodation hole accommodating the specific magnet, the surface facing the first side surface is defined as the first facing surface, and the surface facing the second side surface is defined as the second facing surface. The angle formed between the first side surface and the second side surface is smaller than the angle formed between the first facing surface and the second facing surface.
In the second aspect of the present invention, the magnet array is a Halbach array. The specific magnet is a first specific magnet. Among the plurality of magnets, a magnet accommodated in the specific accommodation hole and magnetized in the circumferential direction of the rotor core is defined as a second specific magnet. The circumferential interval between the rib and the radially inner corner of the second specific magnet is larger than the circumferential interval between the radially outer end of the rib and the second specific magnet.
In the third aspect of the present invention, the circumferential width of the specific magnet continuously changes so as to decrease from the outside toward the inside in the radial direction.
In the fourth aspect of the present invention, among the outer wall surfaces of the specific magnet, a surface located on one side in the circumferential direction is defined as a first side surface, and a surface located on the other circumferential side is defined as a second side surface. Of the inner wall surface of the specific accommodation hole accommodating the specific magnet, the surface facing the first side surface is defined as the first facing surface, and the surface facing the second side surface is defined as the second facing surface. The first side surface is a curved surface that is convex toward the first facing surface side. The second side surface is a curved surface that is convex toward the second facing surface side. The width of the circumferential clearance between the rib and the specific magnet continuously changes so as to increase in the radial direction from the outside toward the inside.
In the fifth aspect of the present invention, the circumferential width of the rib is radially outward in the entire range from the location corresponding to the radially outer corner of the specific magnet to the location corresponding to the radially inner corner. It becomes smaller from the inside to the inside.

  According to the present invention, even if the rib receives a torque and bends and deforms in a state where the rib is in contact with the radially outer corner of the specific magnet, the rib and the radially inner corner of the specific magnet are Can be prevented. Therefore, local concentration of stress on the rib can be avoided. Therefore, breakage of the rib can be suppressed.

It is a figure which shows the motor using the rotor by 1st Embodiment of this invention. It is a figure which shows the rotor of FIG. It is an enlarged view of the III part of FIG. FIG. 4 is an enlarged view of a portion IV in FIG. 3. It is a figure which shows the state which the inner main magnet moved relatively to the circumferential direction from the state of FIG. It is a figure which shows a mode that the rib received the torque and deformed in the state of FIG. It is a figure which expands and shows an inner side main magnet vicinity among the rotors by 2nd Embodiment of this invention. It is a figure which expands and shows an inner side main magnet vicinity among the rotors by 3rd Embodiment of this invention. It is a figure which expands and shows an inner side main magnet vicinity among the rotors by 4th Embodiment of this invention. It is a figure which shows the motor using the rotor by 5th Embodiment of this invention. It is a figure which shows the rotor of FIG. It is an enlarged view of the XII part of FIG. It is a figure which expands and shows the rib vicinity among the rotors by a conventional form.

Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. In the embodiments, substantially the same components are denoted by the same reference numerals and description thereof is omitted. The drawings are schematically shown for easy understanding of the configuration. The dimensions, angles and dimensional ratios of the parts shown in the drawings are not necessarily accurate.
[First Embodiment]
The rotor according to the first embodiment of the present invention is used in the motor 10 shown in FIG. The motor 10 includes a stator 11 and a rotor 12. The stator 11 includes a cylindrical stator core 13 and a coil (not shown) provided in the slot 14 of the stator core 13. The rotor 12 includes a cylindrical rotor core 16 and magnets 17 to 22 embedded in the rotor core 16. The motor 10 causes an alternating current to flow through the coil of the stator 11 to generate a rotating magnetic field, thereby rotating the rotor 12.

First, the rotor 12 will be described with reference to FIG.
The rotor 12 has a plurality of magnetic poles arranged in the circumferential direction. In this embodiment, the number of magnetic poles is 10, for example. The ten magnetic poles are configured by alternately arranging magnetic poles 31 and magnetic poles 32 having different polarities one by one in the circumferential direction.

  The rotor core 16 is made by laminating an annular plate made of a high permeability material such as iron, and has a plurality of magnet housing holes 33, 34, 35 on the outer peripheral portion. The magnet housing holes 33 and 34 are provided at the center of the magnetic pole. The magnet accommodation hole 34 is provided on the inner side in the radial direction with respect to the magnet accommodation hole 33. Further, the magnet accommodation hole 34 has a larger circumferential width than the magnet accommodation hole 33. The magnet accommodation holes 35 are provided on both sides of the magnet accommodation holes 33 and 34 in the circumferential direction.

  The magnet 17 is housed in the magnet housing hole 33 of the magnetic pole 31 and is magnetized inward in the radial direction. The white arrow in the figure indicates the magnetization direction. The magnet 18 is accommodated in the magnet accommodation hole 34 of the magnetic pole 31 and is magnetized inward in the radial direction. The magnet 19 is housed in the magnet housing hole 35 of the magnetic pole 31 and is magnetized in the circumferential direction toward the side opposite to the magnets 17 and 18.

  The magnet 20 is housed in the magnet housing hole 33 of the magnetic pole 32 and is magnetized outward in the radial direction. The magnet 21 is housed in the magnet housing hole 34 of the magnetic pole 32 and is magnetized outward in the radial direction. The magnet 22 is housed in the magnet housing hole 35 of the magnetic pole 32, and is magnetized in the circumferential direction toward the magnets 20 and 21.

  The arrangement of the magnets 17 to 22 is a Halbach arrangement. The outer peripheral portions of the magnets 17 to 22 and the rotor core 16 form a Halbach magnetic circuit. The rotor 12 including the magnets 17 to 22 in the Halbach array increases the amount of magnetic flux by concentrating the magnetic flux at the center of the magnetic pole, and contributes to the torque improvement and efficiency improvement of the motor 10.

  Hereinafter, when the magnets 17 and 20 are distinguished from other magnets, they are referred to as “outer main magnets”. Further, when the magnets 18 and 21 are distinguished from other magnets, they are described as “inner main magnets”. Further, when the magnets 19 and 22 are distinguished from other magnets, they are described as “sub magnets”.

  Next, the magnetic poles of the rotor 12 will be described in more detail with reference to FIGS. The magnetic pole 31 and the magnetic pole 32 have the same configuration except that the polarities are different. Hereinafter, the magnetic pole 31 will be described.

  As shown in FIGS. 3 and 4, the magnet accommodation hole 33 and the magnet accommodation hole 34 are partitioned by elongated ribs 37 extending from the inner side to the outer side in the radial direction. Moreover, the magnet accommodation hole 34 and the magnet accommodation hole 34 which adjoin in the circumferential direction are divided by the elongate rib 38 extended outward from the inner side of radial direction. The magnet accommodation holes 33 and 34 defined by the rib 37 or the rib 38 correspond to “specific accommodation holes” recited in the claims. The inner main magnet 18 accommodated in the “specific accommodation hole” and magnetized in the radial direction corresponds to a “first specific magnet” recited in the claims.

  Of the outer wall surfaces of the inner main magnet 18, a surface located on one side in the circumferential direction is referred to as a first side surface 41, and a surface located on the other side in the circumferential direction is referred to as a second side surface 42. Of the inner wall surface of the magnet housing hole 34 that houses the inner main magnet 18, the surface facing the first side surface 41 is defined as the first facing surface 43, and the surface facing the second side surface 42 is defined. The second facing surface 44 is used. The 1st side surface 41, the 2nd side surface 42, the 1st opposing surface 43, and the 2nd opposing surface 44 are planes. In the present embodiment, the angle θ <b> 1 formed by the first side surface 41 and the second side surface 42 is smaller than the angle θ <b> 2 formed by the first facing surface 43 and the second facing surface 44.

The width of the circumferential gap 45 between the rib 37 and the inner main magnet 18 continuously changes so as to increase from the outside toward the inside in the radial direction.
The circumferential width of the rib 37 is constant in the radial direction. The circumferential width of the rib 37 is the same as the circumferential width of the rib 103 in the conventional embodiment in which the side surface 102 of the inner main magnet 101 and the facing surface 104 of the magnet housing hole 103 are parallel as shown in FIG. .

  The inner main magnet 18 has a rectangular shape in the cross section of the rotor 12, and has two corner portions 39 and 40 at locations facing one rib 37 in the circumferential direction. The corner 39 is located inside in the radial direction. The corner 40 is located outside in the radial direction. The circumferential interval S1 between the rib 37 and the radially inner corner 39 of the inner main magnet 18 is larger than the circumferential interval S2 between the rib 37 and the radially outer corner 40 of the inner main magnet 18.

  Two secondary magnets 19 which are circumferentially magnetized magnets and are adjacent in the circumferential direction attract each other in the circumferential direction. Therefore, the secondary magnet 19 is magnetically attracted to the rib 38 side surface of the inner wall surface of the magnet accommodation hole 35. Therefore, the circumferential clearance 46 between the rib 37 and the secondary magnet 19 can be managed so as to be maintained at a predetermined value or more in consideration of the quality of the annular plate constituting the rotor core 16 and the assembly accuracy of each annular plate. it can.

  On the other hand, the inner main magnet 18 and the outer main magnet 17 that are radially magnetized magnets attract each other in the radial direction. Therefore, although the inner main magnet 18 is magnetically attracted to the radially outer surface of the inner wall surface of the magnet accommodation hole 34, the circumferential position is not fixed. Therefore, the width of the circumferential gap 45 between the rib 37 and the inner main magnet 18 cannot be managed so as to be maintained at a certain value or more. On the other hand, in the present embodiment, since the circumferential interval S1 is larger than the circumferential interval S2, the inner main magnet 18 is relatively moved in the circumferential direction as shown in FIG. Even if contact is made, a gap is formed between the rib 37 and the corner 39.

(effect)
As described above, in the first embodiment, the circumferential interval S1 between the rib 37 and the radially inner corner 39 of the inner main magnet 18 is the radially outer corner 40 of the rib 37 and the inner main magnet 18. Is larger than the circumferential interval S2. With this configuration, even when the rib 37 and the corner portion 40 of the inner main magnet 18 are in contact with each other, even if the rib 37 receives a torque and bends and deforms as shown in FIG. Contact with the corner 39 of the magnet 18 can be suppressed. The circumferential interval S <b> 1 is set so that the rib 37 does not contact the corner 39 of the inner main magnet 18 even if the rib 37 receiving the maximum torque of the motor 10 is bent and deformed. Therefore, local concentration of stress on the rib 37 can be avoided. Therefore, damage to the rib 37 of the rotor core 16 can be suppressed. Further, it is not necessary to make the rib 37 thicker than in the conventional embodiment shown in FIG.

  In the first embodiment, the width of the circumferential gap 45 between the rib 37 and the inner main magnet 18 continuously changes in the radial direction. Therefore, no step is formed between the corner 39 and the corner 40. Therefore, it is possible to avoid the local concentration of stress on the rib 37 due to the rib 37 deformed by receiving the torque contacting the step between the corner 39 and the corner 40.

  In the first embodiment, the angle θ <b> 1 formed by the first side surface 41 and the second side surface 42 is smaller than the angle θ <b> 2 formed by the first facing surface 43 and the second facing surface 44. Thereby, circumferential direction space | interval S1 can be set larger than circumferential direction space | interval S2.

  In the first embodiment, the circumferential width of the rib 37 is constant in the radial direction. Therefore, the circumferential interval S1 can be set larger than the circumferential interval S2 without changing the shape of the rotor core 16 as compared with the conventional embodiment shown in FIG.

  Moreover, in 1st Embodiment, the arrangement | sequence of the magnets 17-22 is a Halbach arrangement. When the Halbach array magnets 17 to 22 are embedded in the rotor core 16, it is desirable to make the magnet housing holes 33, 34, and 35 as large as possible in order to increase the amount of magnetic flux in the magnetic circuit. For this purpose, it is desirable to make the rib 37 defining the magnet accommodation hole 34 as thin as possible. In this regard, in the first embodiment, the rib 37 can be made as thin as possible because the damage to the rib 37 is suppressed by setting the circumferential interval S1 to be larger than the circumferential interval S2.

[Second Embodiment]
In the second embodiment of the present invention, as shown in FIG. 7, the inner main magnet 50 is accommodated in the magnet accommodation hole 34. The first side surface 51 of the inner main magnet 50 is a curved surface that is convex toward the first facing surface 43 side. The second side surface 52 of the inner main magnet 50 is a curved surface that is convex toward the second facing surface 44 side. The width of the circumferential gap 53 between the rib 37 and the inner main magnet 50 continuously changes so as to increase from the outside toward the inside in the radial direction.

  Thus, even if the side surfaces 51 and 52 of the inner main magnet 50 are curved surfaces, the circumferential interval S1 between the rib 37 and the corner 54 on the radially inner side of the inner main magnet 50 is the same as the rib 37 and the inner main magnet 50. The effect similar to that of the first embodiment can be obtained as long as it is set to be larger than the circumferential interval S2 with the corner portion 55 on the radially outer side.

[Third Embodiment]
In the third embodiment of the present invention, as shown in FIG. 8, the inner main magnet 62 is accommodated in the magnet accommodation hole 61 of the rotor core 60. The circumferential width of the rib 63 that defines the magnet accommodation hole 61 is reduced from the outside in the radial direction toward the inside. An angle θ3 formed by the first side surface 66 and the second side surface 67 of the inner main magnet 62 is smaller than an angle θ4 formed by the first facing surface 68 and the second facing surface 69 of the magnet housing hole 61.

  Thus, even if the circumferential width of the rib 63 is changed in the radial direction, the circumferential interval S1 between the rib 63 and the corner 64 on the radially inner side of the inner main magnet 62 is equal to the diameter of the rib 63 and the inner main magnet 62. It can be larger than the circumferential interval S2 with the corner 65 on the outer side in the direction.

[Fourth Embodiment]
In the fourth embodiment of the present invention, as shown in FIG. 9, the secondary magnet 70 accommodated in the “specific accommodation hole” and magnetized in the circumferential direction is the “second identification” according to the claims. Corresponds to “magnet”. The secondary magnet 70 has a rectangular shape in the cross section of the rotor 12. A circumferential interval S3 between the rib 37 and the radially inner corner 71 of the secondary magnet 70 is larger than a circumferential interval S4 between the radially outer end of the rib 37 and the secondary magnet 70. The circumferential interval S5 between the inner wall surface of the magnet housing hole 35 and the corner 72 on the radially outer side of the submagnet 70 is the same as the circumferential interval S4.

  As described above, the secondary magnet 70 that is a circumferentially magnetized magnet can be easily managed so as to keep the circumferential gap 73 with the rib 37 at a certain value or more. However, in order to sufficiently secure the circumferential gap 73, it is necessary to make the sub magnet 70 small, and the amount of magnetic flux is reduced. Even in such a case, according to the fourth embodiment, even if the corner portion 72 of the submagnet 70 and the rib 37 are in contact with each other, the rib 37 and the corner portion 71 on the radially inner side of the submagnet 70 Since a gap is formed between them, a large magnet can be taken. Therefore, local concentration of stress on the rib 37 due to contact between the rib 37 and the corner portion 71 of the submagnet 70 can be avoided while suppressing a decrease in the amount of magnetic flux.

[Fifth Embodiment]
In the fifth embodiment of the present invention, as shown in FIG. 10, the rotor 80 is used in a magnet-assisted synchronous reluctance motor 81. As shown in FIG. 11, the rotor core 82 of the rotor 80 is provided with magnet housing holes 83 to 89 corresponding to the magnetic poles. The magnet accommodation hole 83 is an arcuate slit formed so that the rotation center side of the rotor 80 is convex. The magnet housing holes 84, 85, 86 constitute an arcuate slit formed so that the rotation center side is convex inside the magnet housing hole 83. The magnet housing holes 87, 88, 89 constitute arc-shaped slits formed so that the rotation center side is convex on the inner side with respect to the magnet housing holes 84, 85, 86. Any one of the magnets 90 to 96 is accommodated in the magnet accommodation holes 83 to 89.

  As shown in FIG. 12, the magnet accommodation holes 84 to 89 are defined by ribs 97 extending from the inside to the outside in the radial direction. The circumferential interval S6 between the rib 97 and the radially inner corner 98 of the magnet 92 is larger than the circumferential interval S7 between the rib 97 and the radially outer corner 99 of the magnet 92. The same applies to the magnet 95 and other magnets.

  With this configuration, even if the rib 97 receives a torque and bends and deforms when the rib 97 and the corner portion 99 of the magnet 92 are in contact, the contact between the rib 97 and the corner portion 98 of the magnet 92 is maintained. Can be suppressed. Therefore, local concentration of stress on the rib 97 can be avoided. Therefore, breakage of the rib 97 of the rotor core 82 can be suppressed.

[Other Embodiments]
In another embodiment of the present invention, the rotor core may be composed of a single member instead of a laminated body composed of a plurality of plate members.
In other embodiments of the present invention, the ribs may not be parallel to the radial direction of the rotor core. In short, extending from the inside in the radial direction to the outside includes the case of extending so as to intersect the radial direction of the rotor core.
In other embodiments of the present invention, the number of magnetic poles of the rotor may be other than ten.
The present invention is not limited to the embodiments described above, and can be implemented in various forms without departing from the spirit of the invention.

10, 81 ... rotating electrical machine 16, 60, 82 ... rotor core 17, 18, 19, 20, 21, 22, 50, 62, 70, 90, 91, 92, 93, 94, 95, 96・ Magnets 33, 34, 35, 61, 83, 84, 85, 86, 87, 88, 89 ... Magnet housing holes 37, 38, 63, 97 ... Ribs 39, 54, 64, 98 ... Radial inner corners 40, 55, 65, 99 ... Radial outer corners S1, S2, S6, S7 ... Circumferential spacing

Claims (11)

A rotor used in a rotating electrical machine (10, 81),
A cylindrical rotor core (16, 60, 82) having a plurality of magnet housing holes (33, 34, 35, 61, 83, 84, 85, 86, 87, 88, 89);
A plurality of magnets (17, 18, 19, 20, 21, 22, 50, 62, 70, 90, 91, 92, 93, 94, 95, 96) housed in the magnet housing holes;
With
Of the plurality of magnet housing holes, holes (34, 35, 61, 84, 85, 86, 87, 88, etc.) defined by ribs (37, 38, 63, 97) extending from the inner side to the outer side in the radial direction. 89) as the specific accommodation hole,
When a magnet (18, 21, 50, 92, 95) accommodated in the specific accommodation hole and magnetized in the radial direction of the rotor core among the plurality of magnets is a specific magnet,
The circumferential interval (S1, S6) between the rib and the radially inner corner (39, 54, 64, 98) of the specific magnet is the radially outer corner (40, 40) of the specific magnet. circumferential spacing between 55,65,99) (S2, S7) much larger than the,
Of the outer wall surfaces of the specific magnet, a surface located on one side in the circumferential direction is defined as a first side surface (41, 66), and a surface located on the other side in the circumferential direction is defined as a second side surface (42, 67). ,
Of the inner wall surface of the specific accommodation hole containing the specific magnet, the surface facing the first side surface is defined as a first facing surface (43, 68), and the surface facing the second side surface. Is the second facing surface (44, 69),
The angle (θ1, θ3) formed by the first side surface and the second side surface is smaller than the angle (θ2, θ4) formed by the first opposed surface and the second opposed surface . A rotor used in a rotating electrical machine (10, 81),
A cylindrical rotor core (16, 60, 82) having a plurality of magnet housing holes (33, 34, 35, 61, 83, 84, 85, 86, 87, 88, 89);
A plurality of magnets (17, 18, 19, 20, 21, 22, 50, 62, 70, 90, 91, 92, 93, 94, 95, 96) housed in the magnet housing holes;
With
Of the plurality of magnet housing holes, holes (34, 35, 61, 84, 85, 86, 87, 88, etc.) defined by ribs (37, 38, 63, 97) extending from the inner side to the outer side in the radial direction. 89) as the specific accommodation hole,
When a magnet (18, 21, 50, 92, 95) accommodated in the specific accommodation hole and magnetized in the radial direction of the rotor core among the plurality of magnets is a specific magnet,
The circumferential interval (S1, S6) between the rib and the radially inner corner (39, 54, 64, 98) of the specific magnet is the radially outer corner (40, 40) of the specific magnet. circumferential spacing between 55,65,99) (S2, S7) much larger than the,
The magnet array is a Halbach array,
The specific magnet is a first specific magnet;
When the magnet (70) housed in the specific housing hole and magnetized in the circumferential direction of the rotor core among the plurality of magnets is a second specific magnet,
The circumferential interval (S3) between the rib and the radially inner corner (71) of the second specific magnet is the circumferential interval between the radially outer end of the rib and the second specific magnet. A rotor larger than (S4) . A rotor used in a rotating electrical machine (10, 81),
A cylindrical rotor core (16, 60, 82) having a plurality of magnet housing holes (33, 34, 35, 61, 83, 84, 85, 86, 87, 88, 89);
A plurality of magnets (17, 18, 19, 20, 21, 22, 50, 62, 70, 90, 91, 92, 93, 94, 95, 96) housed in the magnet housing holes;
With
Of the plurality of magnet housing holes, holes (34, 35, 61, 84, 85, 86, 87, 88, etc.) defined by ribs (37, 38, 63, 97) extending from the inner side to the outer side in the radial direction. 89) as the specific accommodation hole,
When a magnet (18, 21, 50, 92, 95) accommodated in the specific accommodation hole and magnetized in the radial direction of the rotor core among the plurality of magnets is a specific magnet,
The circumferential interval (S1, S6) between the rib and the radially inner corner (39, 54, 64, 98) of the specific magnet is the radially outer corner (40, 40) of the specific magnet. circumferential spacing between 55,65,99) (S2, S7) much larger than the,
The circumferential width of the specific magnet is continuously changing so as to decrease from the outside toward the inside in the radial direction . A rotor used in a rotating electrical machine (10, 81),
A cylindrical rotor core (16, 60, 82) having a plurality of magnet housing holes (33, 34, 35, 61, 83, 84, 85, 86, 87, 88, 89);
A plurality of magnets (17, 18, 19, 20, 21, 22, 50, 62, 70, 90, 91, 92, 93, 94, 95, 96) housed in the magnet housing holes;
With
Of the plurality of magnet housing holes, holes (34, 35, 61, 84, 85, 86, 87, 88, etc.) defined by ribs (37, 38, 63, 97) extending from the inner side to the outer side in the radial direction. 89) as the specific accommodation hole,
Among the plurality of magnets, magnets (18, 21, 50, 92, 95) accommodated in the specific accommodation holes and magnetized in the radial direction of the rotor core are defined as specific magnets .
Of the outer wall surface of the specific magnet, the surface located on one side in the circumferential direction is the first side surface (51), the surface located on the other circumferential side is the second side surface (52),
Of the inner wall surface of the specific accommodation hole accommodating the specific magnet, the surface facing the first side surface is defined as a first facing surface (43), and the surface facing the second side surface is defined as a first surface. 2 If it is the opposite surface (44),
The circumferential interval (S1, S6) between the rib and the radially inner corner (39, 54, 64, 98) of the specific magnet is the radially outer corner (40, 40) of the specific magnet. circumferential spacing between 55,65,99) (S2, S7) much larger than the,
The first side surface is a curved surface that is convex toward the first facing surface side,
The second side surface is a curved surface that is convex toward the second facing surface side,
The rotor in which the width of the circumferential clearance (53) between the rib and the specific magnet continuously changes so as to increase in the radial direction from the outside toward the inside . A rotor used in a rotating electrical machine (10, 81),
A cylindrical rotor core (16, 60, 82) having a plurality of magnet housing holes (33, 34, 35, 61, 83, 84, 85, 86, 87, 88, 89);
A plurality of magnets (17, 18, 19, 20, 21, 22, 50, 62, 70, 90, 91, 92, 93, 94, 95, 96) housed in the magnet housing holes;
With
Of the plurality of magnet housing holes, the holes (35, 61) defined by the ribs (63) extending from the inside in the radial direction to the outside are defined as the specific housing holes,
Among the plurality of magnets, if the magnet (62) accommodated in the specific accommodation hole and magnetized in the radial direction of the rotor core is a specific magnet,
The circumferential interval (S1, S6) between the rib and the radially inner corner (39, 54, 64, 98) of the specific magnet is the radially outer corner (40, 40) of the specific magnet. circumferential spacing between 55,65,99) (S2, S7) much larger than the,
The circumferential width of the rib corresponds to the radially inner corner (39, 54, 64, 98) from the location corresponding to the radially outer corner (40, 55, 65, 99) of the specific magnet. A rotor that decreases from the outside in the radial direction to the inside in the entire range up to the point . The circumferential width of the gap (45, 53) between said specified magnet and the ribs, according to any one of claims 1-4, characterized in that a continuous change in the radial direction Rotor. Of the outer wall surface of the specific magnet, the surface located on one side in the circumferential direction is the first side surface (51), the surface located on the other circumferential side is the second side surface (52),
Of the inner wall surface of the specific accommodation hole accommodating the specific magnet, the surface facing the first side surface is defined as a first facing surface (43), and the surface facing the second side surface is defined as a first surface. 2 If it is the opposite surface (44),
The first side surface is a curved surface that is convex toward the first facing surface side,
The rotor according to any one of claims 1 to 4, wherein the second side surface is a curved surface that protrudes toward the second facing surface. The rotor according to claim 1 , wherein a circumferential width of the ribs (37, 38, 97) is constant in a radial direction. The rotor according to any one of claims 1 to 4 , 6 and 7 , wherein a circumferential width of the rib (63) decreases from an outer side in a radial direction toward an inner side. The rotor according to any one of claims 1 to 3, 5, characterized in that the array of magnets is Halbach array. The rotor according to any one of claims 1 to 10 , wherein the rotating electric machine (81) is a magnet-assisted synchronous reluctance motor.

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