JP6551685B2 - Rotor of electric rotating machine - Google Patents

Description

  The present invention relates to a rotor of a rotating electrical machine.

  A permanent magnet type reluctance motor is used as a drive motor for an electric car or a hybrid vehicle. As a type of permanent magnet type reluctance motor, an IPM (Interior Permanent Magnet) motor in which a permanent magnet is embedded in a rotor is known. In the IPM motor, permanent magnets are embedded between the inner and outer peripheral portions of the rotor.

  When the rotor of the IPM motor rotates, centrifugal force acts on the permanent magnet. Due to this centrifugal force, an excessive stress acts on the outer peripheral portion of the rotor. Therefore, the permanent magnets are divided in the circumferential direction of the rotor, and ribs are provided between the adjacent permanent magnets. By connecting the outer peripheral portion and the inner peripheral portion of the rotor with this rib, the stress acting on the outer peripheral portion is relieved.

Japanese Patent Application Publication No. 2003-32926

  In the IPM motor, further relaxation of stress acting on the outer peripheral portion of the rotor is required. In this respect, if the permanent magnet is further divided to increase the number of ribs, it is possible to further relieve the stress. However, since the permanent magnet amount decreases due to the division of the permanent magnet, the output torque of the IPM motor decreases. That is, in the IPM motor, coexistence of alleviating the stress acting on the rotor and securing the output torque has become an issue.

  Therefore, an object of the present invention is to provide a rotor of a rotating electrical machine that can relieve stress acting on the rotor without greatly reducing the output torque of the rotating electrical machine.

In order to solve the above-mentioned subject, the present invention adopted the following modes.
The rotor (for example, the rotor 5 in the embodiment) of the rotating electrical machine in the present invention (for example, the rotating electrical machine 1 in the embodiment) is incorporated in the rotor core (for example, the rotor core 10 in the embodiment) and the rotor core, and the rotor core rotates. A plurality of permanent magnets extending along an axis (for example, the plurality of permanent magnets 18 in the embodiment), and the plurality of permanent magnets are disposed outside the rotor core in the radial direction when viewed from the direction of the rotation shaft. The plurality of permanent magnets are arranged side by side in an arc shape that opens toward the side, and the plurality of permanent magnets are adjacent to each other, for example, a first permanent magnet 22m in the embodiment and a second permanent magnet (for example, the first permanent magnet in the embodiment 2 permanent magnet 24m), and the rotor core is a rib (for example, an embodiment) disposed between the first permanent magnet and the second permanent magnet A rib 23) in the state, and the rib has an outer end (eg, outer end 23b in the embodiment) outside the arc, and an inner end (eg, in the embodiment) inside the arc. It is wider than the width of the inner end 23a).

  According to this structure, compared with the case where the width | variety of the outer side edge part of a rib is equal to the width | variety of an inner side edge part, the output torque of a rotary electric machine is not reduced significantly. Moreover, the stress acting on the rotor during rotation can be significantly reduced. Therefore, it is possible to provide a rotor of a rotating electrical machine that can relieve stress acting on the rotor without greatly reducing the output torque of the rotating electrical machine.

  The first permanent magnet is disposed on the outer side in the radial direction of the rotor core from the second permanent magnet, and is a center point in the width direction of the center point of the arc and the inner end portion of the rib (for example, in the embodiment). With respect to a straight line passing through the inner edge point 63a) (for example, the auxiliary straight line 60 in the embodiment), a first outer end point (for example, the first in the embodiment) on the first permanent magnet side at the outer end of the rib The distance from the outer end point 62b) to the straight line is greater than the distance from the first inner end point on the first permanent magnet side (for example, the first inner end point 62a in the embodiment) to the straight line at the inner end portion of the rib. large.

  According to this configuration, the output torque of the rotating electrical machine is not significantly reduced compared to the case where the distance from the first outer end point to the straight line is equal to the distance from the first inner end point to the straight line. Moreover, the stress acting on the rotor during rotation can be significantly reduced. Therefore, it is possible to provide a rotor of a rotating electrical machine capable of relieving stress acting on the rotor without significantly reducing the output torque of the rotating electrical machine.

The plurality of permanent magnets are bonded magnets.
According to this configuration, the plurality of permanent magnets can be formed into any shape. Therefore, a plurality of permanent magnets can be efficiently laid out on the rotor core to increase the amount of permanent magnets. Thereby, the fall of the output torque of rotation electrical machinery can be controlled. Also, a plurality of permanent magnets can be formed easily and at low cost.

  ADVANTAGE OF THE INVENTION According to this invention, the rotor of a rotary electric machine which can relieve | moderate the stress which acts on a rotor can be provided, without significantly reducing the output torque of a rotary electric machine.

It is a front view of rotation electrical machinery. It is the elements on larger scale of the rotor of the rotary electric machine in an embodiment. It is explanatory drawing of the rib in the rotor of embodiment (Example). FIG. 10 is an explanatory view of a rib in a rotor of Comparative Example 1; FIG. 16 is an explanatory view of a rib in a rotor of Comparative Example 2; It is a graph which shows the output torque of an Example and a comparative example. It is a graph which shows the relationship between the width | variety of the outer edge part of a rib, and stress. It is explanatory drawing of the rib in the rotor of the 1st modification of embodiment. It is explanatory drawing of the rib in the rotor of the 2nd modification of embodiment.

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

  FIG. 1 is a front view of a rotating electrical machine. As shown in FIG. 1, the rotating electrical machine (motor) 1 includes an annular stator 2 and a rotor 5 disposed inside the stator 2.

The rotor 5 includes a rotor core 10 and a plurality of permanent magnets 18. Hereinafter, the rotational axis direction, radial direction and circumferential direction of the rotor core 10 will be referred to as “axial direction”, “radial direction” and “circumferential direction”, respectively.
The rotor core 10 is formed by laminating a plurality of electromagnetic steel plates. The rotor core 10 includes an inner peripheral portion 12 that is arranged on the inner side in the radial direction, an outer peripheral portion 16 that is arranged on the outer side in the radial direction, and a connecting portion 14 that connects the inner peripheral portion 12 and the outer peripheral portion 16. ing.

The inner circumferential portion 12 of the rotor core 10 is formed in a cylindrical shape. The shaft 6 is fixed to the inner side of the inner circumferential portion 12 by press fitting or the like.
The outer peripheral portion 16 of the rotor core 10 is formed in a cylindrical shape. In the outer peripheral portion 16, a plurality of permanent magnets 18 described later are embedded.

  The connecting portion 14 of the rotor core 10 is formed in a net shape when viewed from the axial direction. The connection portion 14 includes a first connection member 14 a and a second connection member 14 b. The first connecting member 14a and the second connecting member 14b are formed in a thin plate shape. The first connecting member 14 a extends on one side (for example, clockwise) in the circumferential direction as it extends outward in the radial direction. The second connection member 14 b extends on the other side (for example, counterclockwise) in the circumferential direction as it extends radially outward.

FIG. 2 is a partial enlarged view of a rotor of the rotating electrical machine according to the embodiment.
The plurality of permanent magnets 18 are incorporated in the outer peripheral portion 16 of the rotor core 10. The plurality of permanent magnets 18 includes magnet arrays (a first magnet array 20, a second magnet array 30, a third magnet array 40, and a fourth magnet array 50). The magnet row is formed in an arc shape that opens outward in the radial direction when viewed from the axial direction. The first magnet array 20, the second magnet array 30, and the third magnet array 40 are formed in a U-shaped arc shape, and the center points are the same (concentric). The fourth magnet array 50 is formed in a V-shaped arc. The magnet row may be formed in a polygonal arc shape connecting a plurality of straight lines. In this case, the permanent magnets adjacent to each other in the magnet array are arranged such that the outer circumferential surfaces of each other form an angle of less than 180 °.

  A plurality of permanent magnets are arranged side by side in the magnet array. In the first magnet array 20, a first permanent magnet 22m, a second permanent magnet 24m, and a third permanent magnet 26m are arranged side by side. The first permanent magnet 22m and the third permanent magnet 26m are disposed radially outside the rotor core 10 with respect to the second permanent magnet 24m. The other magnet arrays included in the plurality of permanent magnets 18 are also formed similarly to the first magnet array 20.

  The first permanent magnet 22 m is formed in the first slit 22 s of the rotor core 10. The first slits 22s penetrate the rotor core 10 in the axial direction. The first permanent magnet 22m is formed by filling the first slit 22s with a bond magnet. The bond magnet is formed of a material obtained by mixing magnetic powder and resin. By employing the bond magnet, the first permanent magnet 22m of an arbitrary shape can be formed easily and at low cost. Other permanent magnets included in the plurality of permanent magnets 18 are also formed in the same manner as the first permanent magnet 22m. A rib 23 is disposed between the first permanent magnet 22m and the second permanent magnet 24m.

(rib)
FIG. 3 is an explanatory diagram of ribs in the rotor of the embodiment (example), and is an enlarged view of a portion P in FIG. 2. The rib 23 in the present application is a portion defined as follows. An inner edge point 63a is formed on the inner edge line 20a of the first magnet row 20 formed in an arc shape. An outer edge point 63b is formed on the outer edge line 20b of the first magnet row 20 formed in an arc shape. A reference straight line 63 connecting the inner edge point 63a and the outer edge point 63b is drawn. The first straight line 62 is set at a position away from the reference straight line 63 toward the first permanent magnet 22m. A second straight line 64 is set at a position away from the reference straight line 63 toward the second permanent magnet 24m. A region surrounded by the first straight line 62, the inner edge line 20a, the second straight line 64, and the outer edge line 20b is defined as a rib 23.

  In the first magnet array 20 formed in an arc shape, the ribs 23 may be defined as follows. An inner edge point 63a is taken on the inner edge line 20a of the first magnet array 20 formed in an arc shape. An auxiliary straight line 60 passing through the center point (not shown) of the arc of the first magnet array 20 and the inner edge point 63a is drawn. A first straight line 62 is set at a position away from the auxiliary straight line 60 toward the first permanent magnet 22m. A second straight line 64 is set at a position away from the auxiliary straight line 60 toward the second permanent magnet 24m. A region surrounded by the first straight line 62, the inner edge line 20a, the second straight line 64, and the outer edge line 20b may be defined as the rib 23. The outer edge point 63 b described above is located at the intersection of the outer edge line 20 b and the auxiliary straight line 60. Therefore, the reference straight line 63 coincides with the auxiliary straight line 60.

  The intersection of the first straight line 62 and the inner edge line 20a is defined as a first inner end point 62a. The intersection of the second straight line 64 and the inner edge line 20a is defined as a second inner end point 64a. At this time, the inner edge line 20 a between the first inner end point 62 a and the second inner end point 64 a is the inner end portion 23 a of the rib 23. Further, the intersection of the first straight line 62 and the outer edge line 20b is defined as a first outer end point 62b. The intersection of the second straight line 64 and the outer edge line 20b is defined as a second outer end point 64b. At this time, the outer edge line 20 b between the first outer end point 62 b and the second outer end point 64 b is the outer end portion 23 b of the rib 23.

  In the definition of the rib 23 described above, the first straight line 62 and the second straight line 62 are arranged so that the distance from the inner edge point 63a to the first inner end point 62a is equal to the distance from the inner edge point 63a to the second inner end point 64a. A straight line 64 may be set. In this case, the inner edge point 63 a is the middle point in the width direction of the inner end 23 a of the rib 23. The auxiliary straight line 60 is a straight line passing through the center point of the arc of the first magnet row 20 and the center point in the width direction of the inner end portion 23 a of the rib 23.

  The rib 23 is a part of the rotor core 10. The rib 23 is disposed between the first slit 22s formed in the rotor core 10 and the second slit 24s. That is, the rib 23 is disposed between the first permanent magnet 22m formed in the first slit 22s and the second permanent magnet 24m formed in the second slit 24s. The first permanent magnet 22m is disposed between the inner edge line 20a and the outer edge line 20b in a region opposite to the rib 23 across the first straight line 62. However, the first permanent magnet 22m is rounded at the corner between the first straight line 62 and the inner edge line 20a and at the corner between the first straight line 62 and the outer edge line 20b. The same applies to the second permanent magnet 24m.

  In the rib 23 of this embodiment, the width of the outer end 23b at the outer side of the arc is wider than the width of the inner end 23a at the inner side of the arc. That is, the length of the outer edge line 20b between the first outer end point 62b and the second outer end point 64b is longer than the length of the inner edge line 20a between the first inner end point 62a and the second inner end point 64a. In particular, in the present embodiment, the distance b2 from the first outer end point 62b to the auxiliary straight line 60 is larger than the distance a2 from the first inner end point 62a to the auxiliary straight line 60. In this case, the length of the outer edge line 20b between the first outer end point 62b and the outer edge point 63b is longer than the length of the inner edge line 20a between the first inner end point 62a and the inner edge point 63a. The distance b4 from the second outer end point 64b to the auxiliary straight line 60 is equal to the distance a4 from the second inner end point 64a to the auxiliary straight line 60. The distance a2 from the first inner end point 62a to the auxiliary straight line 60 is equal to the distance a4 from the second inner end point 64a to the auxiliary straight line 60.

A simulation was performed on the output torque and the stress generated at the time of rotation for the rotor of the rotating electrical machine in the embodiment. The simulation was performed for Comparative Example 1 and Comparative Example 2 in addition to the examples corresponding to the above-described embodiment.
Three types of Example b, Example c and Example d were set as Example. From Example b to Example d, the length of the outer end 23b of the rib 23 increases in order.

  FIG. 4 is an explanatory view of a rib in the rotor of Comparative Example 1, and is an enlarged view of a portion corresponding to a portion P of FIG. In the rib 123 of Comparative Example 1 shown in FIG. 4, the reference straight line 63 and the first straight line 62 are parallel, and the reference straight line 63 and the second straight line 64 are parallel. Further, the distance between the reference straight line 63 and the first straight line 62 and the distance between the reference straight line 63 and the second straight line 64 are the same. Therefore, the width of the inner end 23a of the rib 123 is equal to the width of the outer end 23b. That is, the distance b2 from the first outer end point 62b of the rib 123 to the auxiliary straight line 60 is equal to the distance a2 from the first inner end point 62a to the auxiliary straight line 60. The distance b4 from the second outer end point 64b to the auxiliary straight line 60 is equal to the distance a4 from the second inner end point 64a to the auxiliary straight line 60.

  As Comparative Example 1, four types of Comparative Example 1A, Comparative Example 1B, Comparative Example 1C, and Comparative Example 1D were set. From Comparative Example 1A to Comparative Example 1D, the width of the rib 123 (the width of the inner end 23a and the outer end 23b) increases in order. Here, the width of the inner end 23a of the rib 123 in Comparative Example 1A is equal to the width of the inner end 23a of the rib 23 in Examples b to d.

  FIG. 5 is an explanatory view of a rib in a rotor of Comparative Example 2; In the above-described embodiment (and comparative example 1) shown in FIG. 2, the first magnet row 20 is formed of three permanent magnets. The second magnet array 30 and the third magnet array 40 are also formed of three permanent magnets. On the other hand, in Comparative Example 2 shown in FIG. 5, the first magnet array 220 is formed of seven permanent magnets. The second magnet row 230 is formed of five permanent magnets, and the third magnet row 240 is formed of four permanent magnets. Accordingly, in Comparative Example 2, the number of ribs 223 is larger than that in the example. The shape of the rib 223 is the same as that of Comparative Example 1A.

  FIG. 6 is a graph showing the output torque of the example and the comparative example. When the rotary electric machines including the rotors of the example and the comparative example were driven by the same power, the magnitude of the torque output by the rotary electric machine was simulated.

  A large output torque was obtained in Comparative Example 1A. On the other hand, in Comparative Example 2, the output torque became extremely small. In Comparative Example 2, since the number of ribs 223 is larger than that of Comparative Example 1A, the amount of permanent magnet is smaller than that of Comparative Example 1. Therefore, in Comparative Example 2, the output torque is considered to be smaller than that in Comparative Example 1.

  In the cases of Examples b and d, the output torque slightly decreases compared to Comparative Example 1A, but does not decrease as much as Comparative Example 2. In Examples b and d, since the width of the outer end 23b of the rib 23 is larger than that of Comparative Example 1A, the amount of permanent magnet is smaller than that of Comparative Example 1A. Therefore, in Examples b and d, it is considered that the output torque is slightly lower than that in Comparative Example 1A. However, in Examples b and d, since the amount of permanent magnets is sufficiently larger than that in Comparative Example 2, it is considered that the output torque did not decrease as in Comparative Example 2.

  From the simulation results of FIG. 6, it was found that the output torque of the rotating electrical machine does not decrease significantly in the example as compared with the comparative example 1.

  FIG. 7 is a graph showing the relationship between the width of the outer end of the rib and the stress. When the rotor is rotated, a large force is exerted on the outer peripheral portion of the rotor by the centrifugal force acting on the permanent magnet. At that time, the magnitude of stress generated in the rib supporting the outer peripheral portion was simulated.

In Comparative Example 1, the stress decreased from Comparative Example 1A to Comparative Example 1D. Since the cross-sectional area of the rib 123 increases as the width of the rib 123 increases from Comparative Example 1A to Comparative Example 1D, it is considered that the stress decreases.
In Comparative Example 2 (see FIG. 5), the stress was extremely small. The greater the number of ribs 223, the larger the cross-sectional area of the ribs 223, and thus the stress is considered to be extremely small.

  In the example, the stress decreased from the example b to the example d. As described above, the width of the inner end portion 23a of the rib 23 in Examples b to d is equal to the width of the inner end portion 23a of the rib 123 in Comparative Example 1A. In Examples b to d, only the width of the outer end 23b of the rib 23 is made larger than that of Comparative Example 1A, but the stress is significantly reduced as compared with Comparative Example 1A. Moreover, in Example d, the stress was smaller than in Comparative Example 1D. The width of the outer end 23b of the rib 23 in the example d is the same as that of the comparative example 1D, but the width of the inner end 23a of the rib 23 in the example d is narrower than that of the comparative example 1D (equal to the comparative example 1A). That is, in Example d, although the width of the inner end portion 23a of the rib 23 is narrower than that in Comparative Example 1D, Example d has a smaller stress than that in Comparative Example 1D.

  From the simulation results shown in FIG. 7, it was found that the stress that acts on the rotor during rotation can be significantly reduced in the embodiment as compared with Comparative Example 1.

  As described in detail above, the rotor 5 of the rotating electrical machine 1 in this embodiment includes the rotor core 10 and the plurality of permanent magnets 18. The plurality of permanent magnets 18 are incorporated in the rotor core 10 and extend along the rotation axis of the rotor core 10. The plurality of permanent magnets 18 are arranged side by side in an arc shape that opens toward the outside in the radial direction of the rotor core 10 when viewed from the direction of the rotation axis. The plurality of permanent magnets 18 includes a first permanent magnet 22m and a second permanent magnet 24m that are adjacent to each other. The rotor core 10 has a rib 23 disposed between the first permanent magnet 22m and the second permanent magnet 24m. In the rib 23, the width of the outer end 23b at the outer side of the arc is wider than the width of the inner end 23a at the inner side of the arc.

  In this configuration (example), the output torque of the rotary electric machine 1 is not significantly reduced as compared with the case where the width of the outer end 23b of the rib 23 is equal to the width of the inner end 23a (comparative example 1). Moreover, in the embodiment, compared with the comparative example 1, the stress acting on the rotor 5 at the time of rotation can be significantly reduced. Therefore, it is possible to provide the rotor 5 of the rotating electrical machine 1 that can relieve the stress acting on the rotor 5 without greatly reducing the output torque of the rotating electrical machine 1.

  In addition, the first permanent magnet 22m is disposed on the outer side in the radial direction of the rotor core 10 than the second permanent magnet 24m. An auxiliary straight line 60 passing through the center point of the arc and the midpoint 63 a in the width direction of the inner end 23 a of the rib 23 is assumed. The distance from the first outer end point 62b on the first permanent magnet 22m side to the auxiliary straight line 60 in the outer end 23b of the rib 23 is the distance from the first inner end point 62a on the first permanent magnet 22m side in the inner end 23a of the rib 23 The distance to the auxiliary straight line 60 is greater.

  In this configuration (example), the distance from the first outer end point 62b to the auxiliary straight line 60 is equal to the distance from the first inner end point 62a to the auxiliary straight line 60 (comparative example 1). There is no significant reduction in output torque. Moreover, in the embodiment, compared with the comparative example 1, the stress acting on the rotor 5 at the time of rotation can be significantly reduced. Therefore, it is possible to provide the rotor 5 of the rotating electrical machine 1 that can relieve the stress acting on the rotor 5 without greatly reducing the output torque of the rotating electrical machine 1.

The plurality of permanent magnets 18 are bonded magnets.
According to this configuration, the plurality of permanent magnets 18 can be formed in any shape. Therefore, the plurality of permanent magnets 18 can be efficiently laid out on the rotor core 10 to increase the amount of permanent magnets. Thereby, the fall of the output torque of rotation electrical machinery 1 can be controlled. Also, the plurality of permanent magnets 18 can be formed easily and at low cost.

  The technical scope of the present invention is not limited to the above-described embodiment, and includes the above-described embodiment with various modifications added thereto, without departing from the spirit of the present invention. That is, the configuration of the above-described embodiment is merely an example, and can be changed as appropriate.

(First modification)
FIG. 8 is an explanatory view of a rib in a rotor of a first modified example of the embodiment. In the rib 623 of the first modification, as in the rib 23 of the embodiment, the width of the outer end 23 b is wider than the width of the inner end 23 a. However, unlike the rib 23 of the embodiment, the rib 623 of the first modified example has a distance b2 from the first outer end point 62b to the auxiliary straight line 60 equal to a distance a2 from the first inner end point 62a to the auxiliary straight line 60. In the rib 623 of the first modification, unlike the rib 23 of the embodiment, the distance b4 from the second outer end point 64b to the auxiliary straight line 60 is larger than the distance a4 from the second inner end point 64a to the auxiliary straight line 60. In this case, the length of the outer edge line 20b between the second outer end point 64b and the outer edge point 63b is longer than the length of the inner edge line 20a between the second inner end point 64a and the inner edge point 63a. The distance a2 from the first inner end point 62a to the auxiliary straight line 60 is equal to the distance a4 from the second inner end point 64a to the auxiliary straight line 60. Also in this first modification, the same effect as that of the above-described embodiment can be obtained.

(2nd modification)
FIG. 9 is an explanatory view of a rib in a rotor of a second modified example of the embodiment. In the rib 723 of the second modified example, the width of the outer end 23 b is wider than the width of the inner end 23 a, similarly to the rib 23 of the embodiment. Further, in the rib 623 of the second modified example, the distance b2 from the first outer end point 62b to the auxiliary straight line 60 is larger than the distance a2 from the first inner end point 62a to the auxiliary straight line 60, similarly to the rib 23 of the embodiment. Further, in the rib 623 of the first modified example, the distance b4 from the second outer end point 64b to the auxiliary straight line 60 is larger than the distance a4 from the second inner end point 64a to the auxiliary straight line 60, similarly to the rib 623 of the first modified example. large. The distance a2 from the first inner end point 62a to the auxiliary straight line 60 is equal to the distance a4 from the second inner end point 64a to the auxiliary straight line 60. Also in this second modification, the same effect as that of the above-described embodiment can be obtained.

  DESCRIPTION OF SYMBOLS 1 ... rotary electric machine, 5 ... rotor, 10 ... rotor core, 18 ... several permanent magnet, 22 m ... 1st permanent magnet, 23, 623, 723 ... rib, 23a ... inner end, 23b ... outer end, 24m ... 24th 2 permanent magnets, 60 ... auxiliary straight line (straight line), 62a ... first inner end point, 62b ... first outer end point, 63a ... inner edge point (middle point).

Claims (3)

Rotor core,
A plurality of permanent magnets built in the rotor core and extending along the rotation axis of the rotor core,
The plurality of permanent magnets are arranged side by side in an arc that opens outward in the radial direction of the rotor core as viewed from the direction of the rotation axis.
The plurality of permanent magnets include a first permanent magnet and a second permanent magnet adjacent to each other,
The first permanent magnet and the second permanent magnet are bonded magnets, and are arranged without a gap in a slit extending along the rotation axis of the rotor core,
The rotor core has a rib disposed between the first permanent magnet and the second permanent magnet,
The first permanent magnet and the second permanent magnet have round chamfers at corners on the rib side,
The first permanent magnet is disposed on the outer side in the radial direction of the rotor core from the second permanent magnet,
The first permanent magnet has a radius of curvature of the round chamfer outside the arc larger than a radius of curvature of the round chamfer inside the arc,
The second permanent magnet has a radius of curvature of the round chamfer inside the arc that is larger than a radius of curvature of the round chamfer outside the arc,
The rib has a width of an outer end portion outside the arc larger than a width of an inner end portion inside the arc.
Rotor for rotating electrical machines. The first permanent magnet is disposed radially outward of the rotor core with respect to the second permanent magnet.
From the first outer end point on the first permanent magnet side at the outer end portion of the rib to the straight line with respect to the straight line passing through the center point of the arc and the center point in the width direction of the inner end portion of the rib. Is greater than the distance from the first inner end on the first permanent magnet side to the straight line at the inner end of the rib,
The rotor of the rotary electric machine according to claim 1. The first permanent magnet is disposed radially outward of the rotor core with respect to the second permanent magnet.
From the first outer end point on the first permanent magnet side at the outer end portion of the rib to the straight line with respect to the straight line passing through the center point of the arc and the center point in the width direction of the inner end portion of the rib. Is greater than the distance from the second outer end point on the second permanent magnet side to the straight line at the outer end of the rib,
The rotor of the rotary electric machine according to claim 1 or 2.

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