Manufacturing method and device for rotary electric machine rotor having halbach magnet array

Abstract

Provided is a manufacturing method capable of generating a magnetizing magnetic field of a size necessary for a Halbach magnet array with a simple magnetizing device. A rotary electric machine rotor includes: a first magnet 101 magnetized in the circumferential direction; a second magnet 202 magnetized in the radial direction; and a rotor core 300 formed by alternately arranging, in the circumferential direction, a first magnet hole 311 into which the first magnet is inserted and a second magnet hole 312 into which the second magnet is inserted. The manufacturing method includes: a first step of disposing the first magnet in a first magnet magnetization hole 111 of a first magnetization yoke 100; a second step of disposing the second magnet in a second magnet magnetization hole 212 of a second magnetization yoke 200; a third step of magnetizing the first magnet and the second magnet; and a fourth step of stacking the first magnetization yoke, the second magnetization yoke, and the rotor core, inserting the first magnet into the first magnet hole via a through hole which is formed in the second magnetization yoke and into which the first magnet can be inserted, and inserting the second magnet into the second magnet hole.

Description

Manufacturing method and manufacturing apparatus for rotating electrical machine rotor having Halbach magnet array

[0001] The present invention relates to a method and an apparatus for manufacturing a rotating electrical rotor having a Halbach magnet array.

[0002] Halbach magnet arrays are known as magnet layouts that can improve gap magnetic flux density, and generally use a surface magnet layout to distribute the magnetic flux so that it is concentrated in the gap. As a method for magnetizing a Halbach magnet array, Patent Document 1 discloses a method in which magnetizing coils are installed on the inner and outer periphery of the magnet, and Patent Document 2 discloses a method in which the magnetization process is performed in two stages.

[0003] JP 2020-129888 A JP 2023-108428 A

[0004] Since the magnetic permeability of a magnet is roughly the same as that of air, from the perspective of magnetization, it is better for the magnet to be as thin as possible. However, in a Halbach magnet array, magnets with circumferential magnetization are arranged in addition to magnets with radial magnetization, so a larger magnetizing magnetic field is required. Therefore, magnetizing coils must be placed on the inner and outer periphery of the magnet, which poses the problem of complex and expensive magnetizing devices.

[0005] Furthermore, in a Halbach magnet array, magnets are arranged with the magnetization direction rotated by 90 degrees at a time, resulting in a surface magnet layout and often not requiring a back yoke. This also poses the issue of requiring a larger magnetizing magnetic field.

[0006] An object of the present invention is to provide a manufacturing method and manufacturing apparatus that can generate a magnetizing magnetic field of the magnitude required for a Halbach magnet array using a simple magnetizing device.

[0007] In order to achieve the above object, the present invention includes various embodiments, and one example thereof is a manufacturing method of a rotating electric rotor of the present invention comprising: a rotor core in which first magnet holes and second magnet holes are formed alternately arranged in the circumferential direction; a plurality of first magnets that are magnetized along the circumferential direction and inserted into the first magnet holes; and a plurality of second magnets that are magnetized along the radial direction and inserted into the second magnet holes, the manufacturing method comprising: a first step of arranging the unmagnetized first magnets in first magnet magnetizing holes of a first magnetizing yoke having first magnet magnetizing holes through which the first magnets can be inserted; a second step of arranging the unmagnetized second magnets in second magnet magnetizing holes of a second magnetizing yoke having second magnet magnetizing holes through which the second magnets can be inserted and a second magnetizing yoke through hole through which the first magnets can be inserted; and a third step of magnetizing the first magnets in the first magnet magnetizing holes and magnetizing the second magnets in the second magnet magnetizing holes after the first and second steps. After the third step, a fourth step is carried out in which the first magnet is inserted from the first magnet magnetizing hole of the first magnetizing yoke into the first magnet hole of the rotor core to mount the first magnet in the rotor core, and the second magnet is inserted from the second magnet magnetizing hole of the second magnetizing yoke into the second magnet hole of the rotor core to mount the second magnet in the rotor core, wherein in the fourth step, the first magnet magnetizing hole of the first magnetizing yoke, the second magnetizing yoke through hole of the second magnetizing yoke and the first magnet hole of the rotor core are arranged so as to overlap when viewed in the axial direction along the central axis of rotation of the rotor core, and the second magnet magnetizing hole of the second magnetizing yoke and the second magnet hole of the rotor core are arranged so as to overlap when viewed in the axial direction, and the first magnet in the first magnet magnetizing hole is inserted into the first magnet hole through the second magnetizing yoke through hole.

[0008] The present invention also provides a method for manufacturing a rotating electric rotor comprising: a rotor core in which first magnet holes and second magnet holes are formed alternately in the circumferential direction; a plurality of first magnets that are magnetized along the circumferential direction and inserted into the first magnet holes; and a plurality of second magnets that are magnetized along the radial direction and inserted into the second magnet holes, the method comprising: a first step of arranging the unmagnetized first magnets in the first magnet magnetizing holes of a first magnetizing yoke having first magnet magnetizing holes through which the first magnets can be inserted; a second step of arranging the unmagnetized second magnets in the second magnet holes of the rotor core; and a third step of magnetizing the first magnets in the first magnet magnetizing holes and magnetizing the second magnets in the second magnet holes after the first and second steps. After the third step, a fourth step is carried out in which the first magnet magnetizing hole of the first magnetizing yoke and the first magnet hole of the rotor core are arranged so as to overlap when viewed in the axial direction along the central axis of rotation of the rotor core, and the first magnet in the first magnet magnetizing hole is inserted into the first magnet hole.

[0009] a rotor core having first magnet holes and second magnet holes formed alternately in the circumferential direction; a plurality of first magnets magnetized along the circumferential direction and inserted into the first magnet holes; and a plurality of second magnets magnetized along the radial direction and inserted into the second magnet holes, wherein the manufacturing apparatus for a rotor for a rotating electric machine of the present invention comprises: a first magnetizing yoke having a first magnet magnetizing hole through which the first magnet can be inserted; a second magnetizing yoke having a second magnet magnetizing hole through which the second magnet can be inserted and a second magnetizing yoke through hole through which the first magnet can be inserted; and a magnetizing coil arranged on the radially outer or inner side of the first magnetizing yoke and the second magnetizing yoke, and magnetizing the first magnets and the second magnets; the first magnetizing yoke and the second magnetizing yoke are aligned in the axial direction along the rotational center axis of the rotor core, and are rotatably arranged at a position where the first magnet magnetizing hole and the second magnetizing yoke through hole overlap when viewed in the axial direction; The unmagnetized first magnet is magnetized in the first magnet magnetizing hole of the first magnetizing yoke, and the magnetized first magnet is pushed out of the first magnet magnetizing hole in the axial direction and inserted into the first magnet hole of the rotor core in a state where the first magnet magnetizing hole and the second magnetizing yoke through hole overlap when viewed in the axial direction.

[0010] According to the present invention, it is possible to provide a manufacturing method and manufacturing apparatus for a rotating electrical rotor that can generate a magnetizing magnetic field of the magnitude required for a Halbach magnet arrangement using a simple magnetizing device.

[0011] Problems, configurations, and effects other than those described above will become apparent from the following description of the embodiments.

[0012] FIG. 1 is an explanatory diagram of the overall structure of a rotating electric machine according to a first embodiment of the present invention. FIG. 2 is an explanatory diagram of a magnetizing magnetic field according to the first embodiment of the present invention. FIG. 3 is an explanatory diagram of a magnetizing process according to the first embodiment of the present invention. FIG. 4 is an explanatory diagram of a magnetizing process according to a first modified example of the first embodiment of the present invention. FIG. 5 is an explanatory diagram of a magnetizing process according to a second modified example of the first embodiment of the present invention. FIG. 6 is an explanatory diagram of a magnet dimensional relationship according to the first embodiment of the present invention. FIG. 7 is an explanatory diagram of the overall structure of a rotating electric machine according to a second embodiment of the present invention. FIG. 8 is an explanatory diagram of a magnetizing process according to the second embodiment of the present invention. FIG. 9 is an explanatory diagram of a rotor manufacturing process according to the second embodiment of the present invention. FIG. 10 is an explanatory diagram of a magnetizing process according to a comparative example to the present invention.

[0013] Embodiments of the present invention will be described below with reference to the drawings. In each drawing and each embodiment, identical components with common names and functions are designated by the same symbols to avoid redundant description. Furthermore, while the following description focuses on an inner rotor type rotating electric machine, the effects of the present invention are not limited to this and can also be applied to outer rotor type rotating electric machines. Furthermore, the combination of the number of poles and the number of slots in the following description is merely an example, and the present invention can be applied to other combinations. Furthermore, while the following description describes the effect of the present invention in that the magnetizing yoke can be installed only on the radially outer periphery, the present invention is not limited to this and can also be applied to a configuration in which the magnetizing yoke is installed only on the radially inner periphery.

[0014] [Embodiment 1] A first embodiment of the present invention will be described below with reference to Figures 1 to 6. Figure 1 is an explanatory diagram of the overall structure of a rotating electric machine according to the first embodiment of the present invention. Figure 2 is an explanatory diagram of a magnetizing magnetic field according to the first embodiment of the present invention. Figure 3 is an explanatory diagram of a magnetizing process according to the first embodiment of the present invention. Figure 4 is an explanatory diagram of a magnetizing process according to a first modified example of the first embodiment of the present invention. Figure 5 is an explanatory diagram of a magnetizing process according to a second modified example of the first embodiment of the present invention. Figure 6 is an explanatory diagram of the magnet dimensional relationship according to the first embodiment of the present invention.

[0015] The rotating electric machine 1 of this embodiment includes a rotor having a Halbach magnet array, and can be mounted on automobiles, trucks, buses, construction machinery, railroad vehicles, elevators, home appliances, and the like.

[0016] 1 , the rotating electric machine 1 includes a cylindrical stator 10 and a rotor 20 that is concentrically disposed inside the stator 10 with a gap 21 therebetween. In the following description, a direction parallel to a line passing through the center of the rotation shaft of the rotor 20 of the rotating electric machine 1 (rotation central axis) will be referred to as the "axial direction," a diameter direction of the rotor 20 that is perpendicular to the rotation central axis of the rotor 20 of the rotating electric machine 1 will be referred to as the "radial direction," and a circumferential direction centered on the rotation central axis of the rotor 20 of the rotating electric machine 1 will be referred to as the "circumferential direction."

[0017] FIG. 1 shows a rotating electric machine 1 as viewed from the axial direction. The stator 10 includes a stator core 11 having a plurality of teeth 12 and a plurality of slots 13 formed between adjacent teeth 12, and a coil (not shown) wound around the teeth 12. The rotor 20 includes a rotor core 300 in which a first magnet 101 magnetized in the circumferential direction and a second magnet 202 magnetized in the radial direction are embedded. The first magnets 101 and the second magnets 202 are arranged alternately in the circumferential direction, and this magnet arrangement is called a Halbach magnet arrangement. In this embodiment, as shown in FIG. 1 , the radial width t2 of the second magnet 202 is smaller than the radial width w1 of the first magnet 101. However, the radial width t2 of the second magnet 202 and the radial width w1 of the first magnet 101 may be configured to be equal in size.

[0018] In the Halbach magnet array, the first magnet 101 having circumferential magnetization and the second magnet 202 having radial magnetization are arranged side by side in the circumferential direction, which poses a problem that a larger magnetizing magnetic field is required. This problem will be explained in detail using FIG. 10 . FIG. 10 is an explanatory diagram of the magnetization process according to a comparative example to the present invention. FIG. 10( a) shows the magnetization process of a normal magnet. FIG. 10( b) shows the magnetization process of the Halbach magnet array. In FIG. 10 , the gap 21 side is the outer circumferential side (outer diameter side) of the rotor core 300, and the side opposite the gap 21 side is the inner circumferential side (inner diameter side) of the rotor core 300.

[0019] 10(a), in a normal magnet magnetization process, magnets 202a, 202b, and 202c, each having radial magnetization, are arranged in a line in the circumferential direction, magnetizing coil core 42 is installed on the radially outer periphery of gap 21, and magnetizing coil 41 wound around magnetizing coil core 42 generates magnetizing magnetic field H1 in the direction of the arrow in the figure. Magnetizing magnetic field H1 is generated in a loop shape spanning magnet 202a (or 202c), rotor core 300, and magnet 202b, thereby magnetizing each magnet.

[0020] In contrast, in the Halbach magnet array shown in Figure 10(b), in addition to magnets 202a, 202b, and 202c with radial magnetization, magnets 101a and 101b with circumferential magnetization are arranged side by side in the circumferential direction. Because the magnetic permeability of magnets is approximately the same as that of air, the magnetizing magnetic field H1 generated by magnetizing coil 41 installed on the radially outer side of gap 21 cannot generate the magnetic field necessary for magnetization by itself, as magnet 101a (or 101b) is part of the magnetic path. For this reason, magnetizing coil core 42Low is also installed on the radially inner side of lower gap 21Low, and magnetizing coil 41Low wound around magnetizing coil core 42Low generates magnetizing magnetic field H2 in the direction of the arrow in the figure. Both magnetizing magnetic fields H1 and H2 are generated in a loop shape spanning magnet 202a (or 202c), magnet 101a (or 101b), and magnet 202b. Thus, in a Halbach magnet array, magnetizing coils must be placed on both the radially outer and inner sides of the magnet to generate a larger magnetizing magnetic field, which creates the problem of complex and expensive magnetizing devices. Furthermore, as shown in FIG. 10(b), in a Halbach magnet array, magnets are placed with the magnetization direction rotated by 90°, resulting in a surface magnet layout and often eliminating the need for rotor core 300 (back yoke). This also creates the problem of a larger magnetizing magnetic field being required.

[0021] Therefore, in this embodiment, as shown in Figure 2, the first magnet 101, which has circumferential magnetization, and the second magnet 202, which has radial magnetization, are magnetized using dedicated magnetizing yokes. This solution will be explained in detail below using Figure 2. Note that Figure 2(a) shows the magnetization process for the first magnet (circumferential magnetization) of the present invention, and Figure 2(b) shows the magnetization process for the second magnet (radial magnetization) of the present invention. Note that in Figure 2, the gap 21 side is the outer circumferential side (outer diameter side) of rotor core 300, and the side opposite to the gap 21 side is the inner circumferential side (inner diameter side) of rotor core 300.

[0022] As shown in Figure 2(a), first magnets 101a, 101b having circumferential magnetization are inserted into first magnet magnetizing holes 111 of first magnetizing yoke 100, magnetizing coil core 42 is placed on the radially outer side of gap 21, and magnetizing coil 41 wound around magnetizing coil core 42 generates magnetizing magnetic field H1 in the direction of the arrow in the figure. Magnetizing magnetic field H1 is generated in a loop shape spanning first magnet 101a (or 101b) and first magnetizing yoke 100, thereby magnetizing each magnet. The difference from the magnetizing process of the comparative example shown in Figure 10(b) is that magnetizing magnetic field H1 is applied only to first magnet 101, and second magnet 202 is not included in this configuration.

[0023] 2(b), second magnets 202a, 202b, and 202c having radial magnetization are inserted into second magnet magnetizing holes 212 of second magnetizing yoke 200, and magnetizing coil 41 installed on the radial outer periphery of gap 21 generates magnetizing magnetic field H1 in the direction of the arrow in the figure. Magnetizing magnetic field H1 is generated in a loop shape spanning second magnet 202a (or 202c), second magnetizing yoke 200, and second magnet 202b, thereby magnetizing each magnet. In this configuration, first magnet 101 is not included, and magnetizing magnetic field H1 is applied only to second magnet 202.

[0024] In this way, by using dedicated first magnetizing yoke 100 and second magnetizing yoke 200 for first magnet 101 and second magnet 202, respectively, a magnetizing magnetic field H1 strong enough for magnetization can be generated using only magnetizing coil 41 installed on the radially outer side of gap 21. This solves the problem of complex and expensive magnetizing devices. However, using dedicated magnetizing yokes creates another problem: the process of inserting the magnetized magnet into the rotor core becomes complicated. The present invention solves this problem using the method shown in Figures 3 and 4.

[0025] As shown in Fig. 3, from top to bottom, the first magnetizing yoke 100, the second magnetizing yoke 200, and the rotor core 300 are arranged in the axial direction. In Fig. 3, the axial direction coincides with the vertical direction, but the axial direction may also be horizontal. Also, in Fig. 3, each is arranged with a predetermined gap between them, but they may also be arranged so that they come into contact with each other.

[0026] An unmagnetized first magnet 101 is inserted into the first magnet magnetizing hole 111 of the first magnetizing yoke 100 (first step: first magnet insertion step). For this purpose, the first magnetizing yoke 100 is provided with the first magnet magnetizing hole 111 into which the unmagnetized first magnet 101 is inserted. To facilitate the generation of a magnetizing magnetic field for the first magnet 101, no hole of a size corresponding to the second magnet 202 is provided. However, a first magnetizing yoke through hole 112 is provided with a size that does not affect the generation of the magnetizing magnetic field, and is used in the step of inserting the second magnet 202 into the rotor core 300, as described below.

[0027] That is, when the first magnet magnetization hole 111 and the first magnet hole 311 are overlapping in the axial direction, the first magnetizing yoke 100 has a first magnetization yoke through hole 112 that is smaller than the second magnet hole 312, at a position that overlaps with the second magnet hole 312 in the axial direction. In this case, the cross-sectional area of ​​the first magnetization yoke through hole 112 is smaller than the cross-sectional area of ​​the second magnet 202 and the cross-sectional area of ​​the second magnet magnetization hole 212. In this case, the cross-sectional area of ​​the first magnetization yoke through hole 112 is sufficiently smaller than the cross-sectional area of ​​the second magnet 202, and the second magnet 202 cannot be inserted through the first magnetization yoke through hole 112.

[0028] As described above, the first step is to place an unmagnetized first magnet 101 in the first magnet magnetizing hole 111 of the first magnetizing yoke 100, which has a first magnet magnetizing hole 111 through which the first magnet 101 can be inserted.

[0029] An unmagnetized second magnet 202 is inserted into the second magnet magnetizing hole 212 of the second magnetizing yoke 200 (second step: second magnet insertion step). To facilitate the generation of a magnetizing magnetic field for the second magnet 202, the second magnetizing yoke 200 is provided with a back yoke 210 on its radially inner side. In other words, the second magnetizing yoke 200 includes the back yoke 210 on its radially inner side. In addition, a second magnetizing yoke through hole 211 is provided, which is used in the step of mounting the first magnet 101 to the rotor core 300, as described below.

[0030] As described above, the second step is a step of placing an unmagnetized second magnet 202 in the second magnet magnetization hole 212 of the second magnetization yoke 200, which has a second magnet magnetization hole 212 through which the second magnet 202 can be inserted and a second magnetization yoke through hole 211 through which the first magnet 101 can be inserted.

[0031] Either the first step or the second step may be carried out first, or both may be carried out simultaneously.

[0032] After the first and second steps are completed, the first magnet 101 and the second magnet 202 are magnetized by the magnetizing coil 41 installed on the radially outer side (third step: magnetization step). The magnetizing coil may be configured to generate a magnetizing magnetic field for the first magnetizing yoke 100 and the second magnetizing yoke 200 simultaneously, or a different magnetizing coil may be configured for each magnetizing yoke. Alternatively, a magnetizing coil may be configured to generate a magnetizing magnetic field for one of the magnetizing yokes and then used for the other magnetizing yoke. In either case, a sufficiently large magnetizing magnetic field can be generated using only the magnetizing coil installed on the radially outer side. This solves the problem of complex and expensive magnetizing devices.

[0033] As described above, the third step is a step that follows the first and second steps, in which the first magnet 101 is magnetized in the first magnet magnetizing hole 111 and the second magnet 202 is magnetized in the second magnet magnetizing hole 212.

[0034] The magnetized first magnet 101 is inserted into the first magnet hole 311 provided in the rotor core 300 via the second magnetizing yoke through hole 211 provided in the second magnetizing yoke 200 (fourth step). Similarly, the magnetized second magnet 202 is inserted into the second magnet hole 312 provided in the rotor core 300 by pressing a magnet insertion jig (not shown) axially downward against the first magnetizing yoke through hole 112 provided in the first magnetizing yoke 100 (fourth step). Note that the first magnetizing yoke through hole 112 only needs to be at least one hole, and may be configured with two or more holes as long as the size does not affect the generation of the magnetizing magnetic field.

[0035] As described above, the fourth step is a step that follows the third step, in which the first magnet 101 is inserted from the first magnet magnetizing hole 111 of the first magnetizing yoke 100 into the first magnet hole 311 of the rotor core 300 to implement the first magnet 101 in the rotor core 300, and the second magnet 202 is inserted from the second magnet magnetizing hole 212 of the second magnetizing yoke 200 into the second magnet hole 312 of the rotor core 300 to implement the second magnet 202 in the rotor core 300. In the fourth step, the first magnet magnetizing hole 111 of the first magnetizing yoke 100, the second magnetizing yoke through hole 211 of the second magnetizing yoke 200, and the first magnet hole 311 of the rotor core 300 are arranged so that they overlap when viewed in the axial direction along the central axis of rotation of the rotor core 300, and the second magnet magnetizing hole 212 of the second magnetizing yoke 200 and the second magnet hole 312 of the rotor core 300 are arranged so that they overlap when viewed in the axial direction, and the first magnet 101 in the first magnet magnetizing hole 111 is inserted into the first magnet hole 311 through the second magnetizing yoke through hole 211.

[0036] The insertion of the first magnet 101 into the first magnet hole 311 and the insertion of the second magnet 202 into the second magnet hole 312 may be performed in parallel, or may be performed separately with a time lag. Furthermore, the first magnetizing yoke 100, the second magnetizing yoke 200, and the rotor core 300 may be arranged in a state where the mounting step (fourth step) of the first magnet 101 and the second magnet 202 on the rotor core 300 can be performed when the magnetizing step (third step) is being performed, or they may be arranged in a state for the mounting step (fourth step) after the magnetizing step (third step) is completed. In the latter case, an intermediate step (alignment step) of aligning the first magnetizing yoke 100 and the second magnetizing yoke 200 with the rotor core 300 is performed between the magnetizing step (third step) and the mounting step (fourth step).

[0037] As described above, in this embodiment, a magnetizing magnetic field of the magnitude required for a Halbach magnet arrangement can be generated using a simple magnetizing device, and a manufacturing method and manufacturing device can be provided that allow the magnetized magnets 101, 202 to be easily inserted into a rotor core.

[0038] If the arrangement order of the first magnetizing yoke 100, the second magnetizing yoke 200, and the rotor core 300 shown in FIG. 3 were, from top to bottom, second magnetizing yoke 200, first magnetizing yoke 100, and rotor core 300, the first magnetizing yoke through hole 112 would be too small to pass the magnetized second magnet 202 through it, and it would also be impossible to insert it into the second magnet hole 312 of the rotor core 300. On the other hand, if the first magnetizing yoke through hole 112 were enlarged to a size large enough to allow the second magnet 202 to pass through, it would be impossible to generate a magnetizing magnetic field large enough for the first magnet 101. Therefore, the arrangement order must be, from top to bottom, first magnetizing yoke 100, second magnetizing yoke 200, and rotor core 300, as shown in FIG. 3.

[0039] Here, the description "from top to bottom" is based on a configuration in which the magnetization devices 100, 200, 41 and the rotor core 300 are aligned in the vertical direction and the magnetization devices 100, 200, 41 are disposed above the rotor core 300. For example, a configuration in which the magnetization devices 100, 200, 41 and the rotor core 300 are aligned in the horizontal direction can also be adopted, and in such a case, the arrangement order of the first magnetizing yoke 100, the second magnetizing yoke 200, and the rotor core 300 needs to be rephrased.

[0040] The first magnetizing yoke 100 is formed in a ring shape and has first magnet magnetizing holes 111 in positions corresponding to the first magnet holes 311 of the rotor core 300, the same number as the first magnet holes 311. The second magnetizing yoke 200 is formed in a ring shape and has second magnet magnetizing holes 212 in positions corresponding to the second magnet holes 312 of the rotor core 300, the same number as the second magnet holes 312. The second magnetizing yoke 200 has second magnetizing yoke through holes 211 in positions corresponding to the first magnet holes 311 of the rotor core 300, the same number as the first magnet holes 311.

[0041] The centers of the first magnetizing yoke 100 and the second magnetizing yoke 200 are located on the central axis of rotation of the cylindrical rotor core 300. The first magnetizing yoke 100 and the second magnetizing yoke 200 are arranged in the order of first magnetizing yoke 100, second magnetizing yoke 200 in the direction along the central axis of rotation (axial direction) from the side away from the rotor core 300 toward the side approaching it.

[0042] As a method for further simplifying the magnetizing device of the present invention, there is a method in which the magnetizing yokes 100 and 200 are arranged so as to be in contact with each other in the axial direction, as shown in Fig. 4. With this configuration, it is only necessary to prepare one type of magnetizing coil 41 corresponding to the combined axial length of the first magnetizing yoke 100 and the second magnetizing yoke 200, thereby simplifying the magnetizing device.

[0043] Furthermore, the first magnetizing yoke 100, the second magnetizing yoke 200, and the rotor core 300 can be configured so that the first magnetizing yoke 100 and the second magnetizing yoke 200 are in contact with each other, and the second magnetizing yoke 200 is in contact with the rotor core 300. This makes it possible to reduce the size of the magnetizing device and to easily insert the first magnet 101 and the second magnet 202 into the first magnet hole 311 and the second magnet hole 312.

[0044] In addition, if the second magnetizing yoke 200 and the rotor core 300 have similar shapes, the rotor core 300 may replace the second magnetizing yoke 200, as shown in Fig. 5. By adopting such a configuration, one type of magnetizing yoke equipment can be eliminated, and the magnetizing device can be further simplified.

[0045] 5 , the manufacturing method of the rotor has the following configuration: A manufacturing method of a rotor for a rotating electric machine including a rotor core 300 in which first magnet holes 311 and second magnet holes 312 are formed alternately in the circumferential direction, a plurality of first magnets 101 magnetized along the circumferential direction and inserted into the first magnet holes 311, and a plurality of second magnets 202 magnetized along the radial direction and inserted into the second magnet holes 312, the manufacturing method comprising a first step of arranging unmagnetized first magnets 101 in first magnet magnetizing holes 111 of a first magnetizing yoke 100 having first magnet magnetizing holes 111 through which the first magnets 101 can be inserted, a second step of arranging unmagnetized second magnets 202 in second magnet holes 312 of the rotor core 300, and a third step of magnetizing the first magnets 101 in the first magnet magnetizing holes 111 and magnetizing the second magnets 202 in the second magnet holes 312 after the first and second steps. After the third step, a fourth step is carried out in which the first magnet magnetizing hole 111 of the first magnetizing yoke 100 and the first magnet hole 311 of the rotor core 300 are arranged so that they overlap when viewed in the axial direction along the central axis of rotation of the rotor core 300, and the first magnet 101 in the first magnet magnetizing hole 111 is inserted into the first magnet hole 311.

[0046] FIG. 6 shows the dimensional relationship between the first magnet 101 and the second magnet 202. In this embodiment, the first magnet 101 and the second magnet 202 can be magnetized using the same magnetizing coil 41. However, this requires that there is no significant difference in the magnetizing magnetic fields required for the two magnets 101 and 202. Generally, the greater the magnetic reluctance of a magnet, the greater the magnetizing magnetic field H1 required. For this reason, it is desirable to configure the first magnet 101 and the second magnet 202 so that the difference in magnetic reluctance is small. Specifically, since the magnetic reluctance of a magnet is proportional to the length t in the magnetization direction and inversely proportional to the magnet width w, the magnetic reluctance R1 (∝t1 / w1) per magnet of the first magnet 101 and the magnetic reluctance R2 (∝t2 / w2) per magnet of the second magnet 202 are configured to satisfy the following relationship:

[0047] R2 < R1 < 2×R2 That is, t2 / w2 < t1 / w1 < 2×t2 / w2 ... (1) By using the above configuration, the difference in magnetic resistance between the first magnet 101 and the second magnet 202 can be reduced, making it easier to magnetize them using the same magnetizing coil.

[0048] As described above, in this embodiment, the magnetization direction length t1 of each first magnet 101 and the magnet width w1 in the direction perpendicular to the magnetization direction, and the magnetization direction length t2 of each second magnet 212 and the magnet width w2 in the direction perpendicular to the magnetization direction have the relationship expressed by equation (1).

[0049] [Embodiment 2] A second embodiment of the present invention will be described with reference to Figures 7 to 9. Figure 7 is an explanatory diagram of the overall structure of a rotating electric machine according to the second embodiment of the present invention. Figure 8 is an explanatory diagram of a magnetizing process according to the second embodiment of the present invention. Figure 9 is an explanatory diagram of a rotor manufacturing process according to the second embodiment of the present invention.

[0050] 7, the rotor core 300 is composed of split cores 310, which are fastened to a split core fixing member 30. The split core fixing member 30 is configured so that split core fastening projections 31 and fastening recesses 32 are arranged alternately in the circumferential direction on the surface facing the split rotor cores 310.

[0051] That is, the rotor core 300 is composed of a plurality of split cores 310 and a split core fixing member 30 to which the split cores 310 are fastened, and the split core fixing member 30 is made of a non-magnetic material and has split core fastening protrusions 31 and fastening recesses 32 arranged alternately in the circumferential direction on the surface facing the split cores 310.

[0052] As in the first embodiment, the first magnet 101 magnetized in the circumferential direction and the second magnet 202 magnetized in the radial direction are arranged in a Halbach magnet array.

[0053] In order to suppress magnetic flux leakage from the first magnet 101, the split core fixing member 30 is generally made of a non-magnetic material. In this case, the magnetic permeability of the split core fixing member 30 is approximately equal to that of air, so even if a magnetizing coil is placed on the radially inner side, only a small magnetizing magnetic field can be generated. For this reason, it is necessary to generate a sufficiently large magnetizing magnetic field using only the magnetizing coil 41 placed on the radially outer side. This embodiment can provide a manufacturing method and manufacturing apparatus that can generate a magnetizing magnetic field of the magnitude required for the Halbach magnet arrangement using a simple magnetizing device, even for such a split core configuration, and that can easily insert the magnetized magnet into the rotor core 300.

[0054] Specifically, as shown in Fig. 8, from top to bottom, the first magnetizing yoke 100, the stopper 400, the second magnetizing yoke 200, the positioning plate 500, the end plate 600, and the split core fixing member 30 including the rotor split core 310 are arranged in the axial direction. In Fig. 8, the axial direction coincides with the vertical direction, but the axial direction may also be horizontal, as explained in the first embodiment.

[0055] 8, the magnets are shown spaced apart from each other for ease of explanation, but in reality they are placed in contact with each other to prevent axial movement. The difference from FIG. 3 is the addition of a stopper 400, a positioning plate 500, and an end plate 600. The first magnetizing yoke 100 and the second magnetizing yoke 200 are configured in the same manner as in the first embodiment.

[0056] The stopper 400 has through holes 411 and 412, the positioning plate 500 has through holes 511 and 512, and the end plate 600 has through holes 611 and 612. The stopper 400 is annular in shape and has the same number of through holes 411 and 412 as the first magnet holes 311 and second magnet holes 312 of the rotor core 300. The through holes 411 and 412 are arranged to correspond to the first magnet holes 311 and second magnet holes 312 in the circumferential direction. The positioning plate 500 is annular in shape and has the same number of through holes 511 and 512 as the first magnet holes 311 and second magnet holes 312 of the rotor core 300. The through holes 511 and 512 are arranged to correspond to the first magnet holes 311 and second magnet holes 312 in the circumferential direction. The end plate 600 has an annular shape and has the same number of through holes 611 and 612 as the first magnet holes 311 and second magnet holes 312 of the rotor core 300. The through holes 611 and 612 are arranged to correspond to the first magnet holes 311 and second magnet holes 312 in the circumferential direction.

[0057] Through holes 411, 412, 511, 512, 611, 612 may be referred to as follows: Through hole 411: first stopper through hole Through hole 412: second stopper through hole Through hole 511: first positioning plate through hole Through hole 512: second positioning plate through hole Through hole 611: first end plate through hole Through hole 612: second end plate through hole Through holes 411, 511, 611 are all configured to be larger in size than first magnet 101, and through holes 512, 612 are all configured to be larger in size than second magnet 202. As will be described later, through holes 411, 511, 611 are used in the process of inserting first magnet 101 into split rotor core 310, and through holes 512, 612 are used in the process of inserting second magnet 202 into split rotor core 310.

[0058] 8 shows the state after the first step (first magnet insertion step) of inserting an unmagnetized first magnet 101 into the first magnetizing yoke 100 and the second step (second magnet insertion step) of inserting an unmagnetized second magnet 202 into the second magnetizing yoke 200 have been completed. Either the first step or the second step may be performed first, or both may be performed simultaneously.

[0059] At this stage, neither the first magnet 101 nor the second magnet 202 is magnetized, so they do not generate any attractive force against the first magnetizing yoke 100 or the second magnetizing yoke 200, and so they move freely. Therefore, as shown in Figure 8, by displacing the circumferential positions of the through-hole 411 of the stopper 400 and the through-hole 511 of the positioning plate 500 by half a pole with respect to the first magnet 101, the first magnet 101 and the second magnet 202 can be fixed so that they do not move in the axial direction. In this state, the third step (magnetizing step) is carried out, in which the first magnet 101 and the second magnet 202 are magnetized by the magnetizing coil 41 installed on the radially outer side.

[0060] For this reason, in the third step, the stopper 400 is positioned so that the first stopper through-hole 411 does not overlap the first magnet magnetizing hole 111 when viewed in the axial direction, and the positioning plate 500 is positioned so that the second positioning plate through-hole 512 does not overlap the second magnet magnetizing hole 212 when viewed in the axial direction. This allows the unmagnetized first magnet 101 to be held in the first magnet magnetizing hole 111, and the unmagnetized second magnet 202 to be held in the second magnet magnetizing hole 212. Also in this case, in the third step, the first stopper through-hole 411 and the first positioning plate through-hole 511 are positioned so that they overlap when viewed in the axial direction.

[0061] 8, it is desirable that the through holes 611 of the end plate 600 are arranged so that their circumferential positions coincide with those of the through holes 511 of the positioning plate 500. The reason for this will be described later.

[0062] 9( a), a fourth step (mounting step) is performed in which the magnetized first magnet 101 and second magnet 202 are inserted into the split rotor core 310. In the fourth step, first, the through hole 411 of the stopper 400 and the through hole 511 of the positioning plate 500 are aligned circumferentially with the first magnet 101 of the first magnetizing yoke 100. The first magnet 101 is then pushed axially downward from its embedded state in the first magnet magnetizing hole 111 of the first magnetizing yoke 100, passes through the through hole 411 of the stopper 400, the through hole 211 of the second magnetizing yoke 200, the through hole 511 of the positioning plate 500, and the through hole 611 of the end plate 600, and is inserted into the first magnet hole 311 provided in the split rotor core 310.

[0063] Similarly, the second magnet 202 is embedded in the second magnet magnetization hole 212 of the second magnetizing yoke 200, and by pressing a magnet insertion jig (not shown) axially downward against the through hole 112 of the first magnetizing yoke 100 and the through hole 412 of the stopper 400, the second magnet 202 passes through the through hole 512 of the positioning plate 500 and the through hole 612 of the end plate 600 and is inserted into the second magnet hole 312 provided in the rotor split core 310.

[0064] The positioning plate 500 is interposed between the second magnetizing yoke 200 and the rotor core 300, and guides the first magnet 101 and the second magnet 202 from the through-hole 211 and the second magnet magnetizing hole 212 of the second magnetizing yoke 200 to the first magnet hole 311 and the second magnet hole 312 of the rotor core 300. In this sense, the positioning plate 500 performs the function of positioning the first magnet 101 and the second magnet 202 in the circumferential and radial directions. For this reason, the through-holes 511, 512 of the positioning plate 500 are desirably shaped so that a large clearance is provided relative to the magnet size at the axial ends where the first magnet 101 and the second magnet 202 are inserted, and the clearance gradually narrows toward the axial center of the positioning plate 500.

[0065] That is, the size (cross-sectional area) of the first positioning plate through-hole 511 and the second positioning plate through-hole 512 at the axial end on the second magnetizing yoke 200 side is larger than the size (cross-sectional area) at the axial center. In particular, the first magnet hole 311 and the second magnet hole 312 are set to have a small clearance with respect to the first magnet 101 and the second magnet 202 in order to improve magnetic characteristics. For this reason, the positioning plate 500 plays a major role in the implementation of the first magnet 101 and the second magnet 202.

[0066] Furthermore, by constructing the positioning plate 500 from a non-magnetic material, no attractive force is generated between the magnetized magnets 101 and 202 and the positioning plate 500, making it easier to push the magnets axially downward. Furthermore, by constructing the positioning plate 500 from a non-magnetic material, when inserting the magnets 101 and 202 into the split rotor core 310, a new attractive force is generated between the magnets 101 and 202 and the core 310, making it easier to insert the magnets 101 and 202 into the first magnet holes 311 and the second magnet holes 312. To achieve this effect, it is desirable to make the axial length of the positioning plate 500 equal to or greater than the axial length of the split rotor core 310. Therefore, in this embodiment, the axial length of the positioning plate 500 is equal to or greater than the axial length of the rotor core 300.

[0067] Furthermore, it is desirable that the material of the positioning plate 500 be a resin material with excellent sliding properties. Therefore, it is desirable that the positioning plate 500 be made of a material with a smaller coefficient of friction than the material constituting the first magnetizing yoke 100 and the second magnetizing yoke 200. It is also desirable that the first positioning plate through-hole 511 and the second positioning plate through-hole 512 be coated with a material with a smaller coefficient of friction than the material constituting the first positioning plate 500. This allows the first magnet 101 and the first magnet 202 to easily pass through the first positioning plate through-hole 511 and the second positioning plate through-hole 512.

[0068] Additionally, it is desirable that the second magnetizing yoke through hole 211 be coated with a material that has a smaller coefficient of friction than the material that constitutes the second magnetizing yoke 200. This allows the first magnet 101 to easily pass through the second magnetizing yoke through hole 211. Additionally, it is desirable that the first magnetizing yoke through hole 112 be coated with a material that has a smaller coefficient of friction than the material that constitutes the first magnetizing yoke 100. This makes it easier to insert the magnet insertion jig described above.

[0069] Furthermore, it is desirable to apply a coating material with excellent sliding properties to the magnet magnetization holes 111 and 212 of the magnetization yokes 100 and 200 as well.

[0070] From the viewpoint described above, in this embodiment, at least one of the first magnet magnetizing hole 111, the second magnet magnetizing hole 212, the second magnetizing yoke through hole 211, the first positioning plate through hole 511, and the second positioning plate through hole 512 is made of a material or coating with a smaller friction coefficient than the material constituting the second magnetizing yoke 200 on the surface facing the first magnet 101 or the second magnet 202.

[0071] 9(b), the stopper 400, the positioning plate 500, and the end plate 600 are installed so that their circumferential positions are shifted by half a pole with respect to the first magnet 101. The arrangement of the stopper 400, the positioning plate 500, and the end plate 600 is the same as that in the third step.

[0072] After the fourth step is completed, the end plate 600 is positioned so that the first end plate through-hole 611 does not overlap the first magnet 101 in the axial direction, and the end plate 600 and rotor core 300 are integrated, while the positioning plate 500 and end plate 600 are mechanically separated. As a result, as shown in Figure 9(c), the end plate 600 functions as a fixing plate for the axial positions of the split rotor core 310 and the magnets 101, 202, thereby completing the manufacture of the rotor 20. Furthermore, since the first magnetizing yoke 100, stopper 400, second magnetizing yoke 200, and positioning plate 500, from top to bottom in Figure 9(b), are in the same positional relationship as in Figure 8, the next magnetizing step can be smoothly repeated simply by inserting a new, unmagnetized magnet into the magnetizing yoke.

[0073] 8 and 9, it is desirable to arrange the through-holes 411, 511, 611 of the stopper 400, the positioning plate 500, and the end plate 600 so that their circumferential positions always coincide. Specifically, the above-mentioned simple manufacturing method and manufacturing apparatus can be provided by providing a mechanism that mechanically connects the stopper 400, the positioning plate 500, and the end plate 600 and controlling this mechanism with a single rotary actuator. That is, in this embodiment, when transitioning from the third process to the fourth process, the stopper 400, the positioning plate 500, and the end plate 600 are mechanically connected and operate together.

[0074] However, the stopper 400, positioning plate 500, and end plate 600 may each be connected to and controlled by a separate rotary actuator. Alternatively, the stopper 400, positioning plate 500, and end plate 600 may be fixed, and a mechanism may be provided that mechanically connects the first magnetizing yoke 100, the second magnetizing yoke 200, and the rotor core 300, and this mechanism may be controlled by a single rotary actuator. Alternatively, the first magnetizing yoke 100, the second magnetizing yoke 200, and the rotor core 300 may each be connected to and controlled by separate rotary actuators. Either method makes it extremely easy to fix the magnets 101 and 202 in the axial direction during the magnetizing process, and to position the magnetized magnets 101 and 202 in the circumferential and radial directions when inserting them into the rotor core 300. Furthermore, it is possible to simultaneously achieve improved ease of insertion of the magnets 101 and 202, the function of the end plate 600 that fixes the axial position of the magnets 101 and 202, and smooth repetition of the magnetizing process.

[0075] The configurations of the stopper 400, the positioning plate 500 and the end plate 600 can be applied to the first embodiment.

[0076] As described above, this embodiment includes the stopper 400 disposed between the first magnetizing yoke 100 and the second magnetizing yoke 200, and the positioning plate 500 and end plate 600 disposed between the second magnetizing yoke 200 and the rotor core 300, with the positioning plate 500 and end plate 600 disposed in this order from the second magnetizing yoke 200 side toward the rotor core 300. The first magnetizing yoke 100, the stopper 400, the second magnetizing yoke 200, the positioning plate 500, the end plate 600, and the rotor core 300 contact each other between adjacent members in the axial direction along the central axis of rotation. The stopper 400 includes a first stopper through-hole 411 and a second stopper through-hole 412 into which the first magnet 101 and the second magnet 202 can be inserted, respectively. The positioning plate 500 has a first positioning plate through-hole 511 and a second positioning plate through-hole 512 into which the first magnet 101 and the second magnet 202 can be inserted, respectively. The end plate 600 has a first end plate through-hole 611 and a second end plate through-hole 612 into which the first magnet 101 and the second magnet 202 can be inserted, respectively. In a fourth step, the first magnet 101 is inserted into the first magnet hole 311 via the first stopper through-hole 411, the first positioning plate through-hole 511, and the first end plate through-hole 611, and the second magnet 202 is inserted into the second magnet hole 312 via the second positioning plate through-hole 512 and the second end plate through-hole 612.

[0077] Based on the above-described embodiment, the manufacturing apparatus for a rotor for a rotating electrical machine has the following features.

[0078] (1) A manufacturing apparatus for a rotary electric rotor comprising: a rotor core 300 in which first magnet holes 311 and second magnet holes 312 are formed alternately in the circumferential direction; a plurality of first magnets 101 magnetized along the circumferential direction and inserted into the first magnet holes 311; and a plurality of second magnets 202 magnetized along the radial direction and inserted into the second magnet holes 312; wherein the manufacturing apparatus comprises: a first magnetizing yoke 100 having first magnet magnetizing holes 111 through which the first magnets 101 can be inserted; a second magnetizing yoke 200 having second magnet magnetizing holes 212 through which the second magnets 202 can be inserted and second magnetizing yoke through holes 211 through which the first magnets 101 can be inserted; and a magnetizing coil 41 arranged radially outer or inner around the first magnetizing yoke 100 and the second magnetizing yoke 200, which magnetizes the first magnets 101 and the second magnets 202. The first magnetizing yoke 100 and the second magnetizing yoke 200 are aligned in the axial direction along the central axis of rotation of the rotor core 300, and are rotatably arranged in a position where the first magnet magnetizing hole 111 and the second magnetizing yoke through hole 211 overlap when viewed in the axial direction. The unmagnetized first magnet 101 is magnetized in the first magnet magnetizing hole 111 of the first magnetizing yoke 100, and the magnetized first magnet 101 is pushed out in the axial direction from the first magnet magnetizing hole 111 and inserted into the first magnet hole 311 of the rotor core 300 with the first magnet magnetizing hole 111 and the second magnetizing yoke through hole 211 overlapping when viewed in the axial direction.

[0079] (2) The second magnetizing yoke 200 is arranged between the first magnetizing yoke 100 and the rotor core 300 in the axial direction, and the first magnet 101 magnetized in the first magnet magnetizing hole 111 of the first magnetizing yoke 100 is inserted into the first magnet hole 311 through the second magnetizing yoke through hole 211 with the first magnet magnetizing hole 111 and the first magnet hole 101 arranged to overlap when viewed in the axial direction, and the second magnet 202 magnetized in the second magnet magnetizing hole 212 of the second magnetizing yoke 200 is inserted into the second magnet hole 312 with the second magnet magnetizing hole 212 and the second magnet hole 312 arranged to overlap when viewed in the axial direction.

[0080] (3) In (1), the second magnetizing yoke 200 is formed by the rotor core 300, the second magnetizing yoke through hole 211 is formed by the first magnet hole 311, and the second magnet magnetizing hole 212 is formed by the second magnet hole 312.

[0081] The present invention is not limited to the above-described embodiments, but includes various modifications. For example, the above-described embodiments have been described in detail to clearly explain the present invention, and are not necessarily limited to those including all of the configurations. Furthermore, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, or to add the configuration of another embodiment to the configuration of one embodiment. Furthermore, it is possible to add, delete, or replace part of the configuration of each embodiment with other configurations.

[0082] 30...split core fixing member, 31...split core fastening protrusion, 32...fastening recess, 100...first magnetizing yoke, 101...first magnet, 111...first magnet magnetizing hole, 112...first magnetizing yoke through hole, 200...second magnetizing yoke, 202...second magnet, 210...back yoke, 211...second magnetizing yoke through hole, 212...second magnet magnetizing hole, 300...rotor core, 310...split core, 311...first magnet hole, 312...second magnet hole, 400...stopper, 411... First stopper through hole, 412...second stopper through hole, 500...positioning plate, 511...first positioning plate through hole, 512...second positioning plate through hole, 600...end plate, 611...first end plate through hole, 612...second end plate through hole, t1...length in the magnetization direction of first magnet 101, t2...length in the magnetization direction of second magnet 202, w1...magnet width in the direction perpendicular to the magnetization direction of first magnet 101, w2...magnet width in the direction perpendicular to the magnetization direction of second magnet 202.

Claims

1. A manufacturing method for a rotating electric rotor comprising: a rotor core in which first magnet holes and second magnet holes are formed alternately in the circumferential direction; a plurality of first magnets that are magnetized in the circumferential direction and inserted into the first magnet holes; and a plurality of second magnets that are magnetized in the radial direction and inserted into the second magnet holes, the manufacturing method comprising: a first step of arranging the unmagnetized first magnets in the first magnet magnetizing holes of a first magnetizing yoke having first magnet magnetizing holes through which the first magnets can be inserted; a second step of arranging the unmagnetized second magnets in the second magnet magnetizing holes of a second magnetizing yoke having second magnet magnetizing holes through which the second magnets can be inserted and second magnetizing yoke through holes through which the first magnets can be inserted; and a third step of magnetizing the first magnets in the first magnet magnetizing holes and magnetizing the second magnets in the second magnet magnetizing holes after the first and second steps. After the third step, a fourth step is carried out in which the first magnet is inserted from the first magnet magnetizing hole of the first magnetizing yoke into the first magnet hole of the rotor core to mount the first magnet in the rotor core, and the second magnet is inserted from the second magnet magnetizing hole of the second magnetizing yoke into the second magnet hole of the rotor core to mount the second magnet in the rotor core, wherein in the fourth step, the first magnet magnetizing hole of the first magnetizing yoke, the second magnetizing yoke through hole of the second magnetizing yoke and the first magnet hole of the rotor core are arranged so as to overlap when viewed in the axial direction along the central axis of rotation of the rotor core, and the second magnet magnetizing hole of the second magnetizing yoke and the second magnet hole of the rotor core are arranged so as to overlap when viewed in the axial direction, and the first magnet in the first magnet magnetizing hole is inserted into the first magnet hole through the second magnetizing yoke through hole.

2. A method for manufacturing a rotating electric rotor according to claim 1, wherein the radial width of the second magnet is smaller than the radial width of the first magnet.

3. A method for manufacturing a rotating electric rotor as described in claim 1, wherein the first magnetizing yoke has a first magnetizing yoke through hole that is smaller than the second magnet hole at a position that overlaps with the second magnet hole in the axial direction when the first magnet magnetizing hole and the first magnet hole overlap in the axial direction.

4. A method for manufacturing a rotating electric rotor according to claim 1, wherein the second magnetizing yoke is provided with a back yoke on the radially inner side.

5. A method for manufacturing a rotating electric rotor as set forth in claim 1, wherein the length t1 of each of the first magnets in the magnetization direction and the magnet width w1 in the direction perpendicular to the magnetization direction, and the length t2 of each of the second magnets in the magnetization direction and the magnet width w2 in the direction perpendicular to the magnetization direction satisfy the relationship t2 / w2 < t1 / w1 < 2 × t2 / w2 ... (1).

6. A method for manufacturing a rotating electric rotor as described in claim 1, wherein the rotor core is composed of a plurality of split cores and a split core fixing member to which the split cores are fastened, and the split core fixing member is made of a non-magnetic material and has split core fastening projections and fastening recesses arranged alternately in the circumferential direction on the surface facing the split cores.

7. A method for manufacturing a rotating electric rotor according to claim 1, comprising: a stopper arranged between the first magnetizing yoke and the second magnetizing yoke; and a positioning plate and an end plate arranged between the second magnetizing yoke and the rotor core, the positioning plate and the end plate being arranged in this order from the second magnetizing yoke side towards the rotor core, the first magnetizing yoke, the stopper, the second magnetizing yoke, the positioning plate, the end plate and the rotor core being in contact with each other in the axial direction along the central axis of rotation, the stopper having a first stopper through hole and a second stopper through hole into which the first magnet and the second magnet can be inserted respectively, the positioning plate having a first positioning plate through hole and a second positioning plate through hole into which the first magnet and the second magnet can be inserted respectively, the end plate having a first end plate through hole and a second end plate through hole into which the first magnet and the second magnet can be inserted respectively, and in the fourth step: A method for manufacturing a rotating electric rotor, wherein the first magnet is inserted into the first magnet hole through the first stopper through hole, the first positioning plate through hole, and the first end plate through hole, and the second magnet is inserted into the second magnet hole through the second positioning plate through hole and the second end plate through hole.

8. A method for manufacturing a rotating electric rotor as described in claim 7, wherein the size of the first positioning plate through hole and the second positioning plate through hole at their axial ends on the side of the second magnetizing yoke is larger than the size at their axial center.

9. A method for manufacturing a rotor for a rotating electrical machine according to claim 7, wherein the axial length of the positioning plate is equal to or greater than the axial length of the rotor core.

10. A method for manufacturing a rotating electric rotor as described in claim 7, wherein the surface of at least one of the first magnet magnetizing hole, the second magnet magnetizing hole, the second magnetizing yoke through hole, the first positioning plate through hole, and the second positioning plate through hole that faces the first magnet or the second magnet is made of a material or coating with a smaller friction coefficient than the material that makes up the second magnetizing yoke.

11. A method for manufacturing a rotating electric rotor as described in claim 7, wherein, after completion of the fourth step, the end plate is positioned so that the first end plate through hole does not overlap the first magnet when viewed in the axial direction, and the end plate and the rotor core are integrated, while the positioning plate and the end plate are mechanically separated.

12. A manufacturing method of a rotary electric rotor comprising: a rotor core in which first magnet holes and second magnet holes are formed alternately in the circumferential direction; a plurality of first magnets that are magnetized in the circumferential direction and inserted into the first magnet holes; and a plurality of second magnets that are magnetized in the radial direction and inserted into the second magnet holes, the manufacturing method comprising: a first step of arranging the unmagnetized first magnets in the first magnet magnetizing holes of a first magnetizing yoke having first magnet magnetizing holes through which the first magnets can be inserted; a second step of arranging the unmagnetized second magnets in the second magnet holes of the rotor core; and a third step of magnetizing the first magnets in the first magnet magnetizing holes and magnetizing the second magnets in the second magnet holes after the first and second steps. a fourth step of, after the third step, arranging the first magnet magnetizing hole of the first magnetizing yoke and the first magnet hole of the rotor core so that they overlap when viewed in the axial direction along the central axis of rotation of the rotor core, and inserting the first magnet in the first magnet magnetizing hole into the first magnet hole.

13. A manufacturing device for a rotary electric rotor comprising: a rotor core in which first magnet holes and second magnet holes are formed alternately in the circumferential direction; a plurality of first magnets magnetized in the circumferential direction and inserted into the first magnet holes; and a plurality of second magnets magnetized in the radial direction and inserted into the second magnet holes, wherein the manufacturing device comprises: a first magnetizing yoke having a first magnet magnetizing hole through which the first magnet can be inserted; a second magnetizing yoke having a second magnet magnetizing hole through which the second magnet can be inserted and a second magnetizing yoke through hole through which the first magnet can be inserted; and a magnetizing coil arranged on the radial outer or inner side of the first magnetizing yoke and the second magnetizing yoke, and magnetizing the first magnets and the second magnets; the first magnetizing yoke and the second magnetizing yoke are aligned in the axial direction along the central axis of rotation of the rotor core, and are rotatably arranged in a position where the first magnet magnetizing hole and the second magnetizing yoke through hole overlap when viewed in the axial direction; A manufacturing device for a rotating electric rotor, which magnetizes the unmagnetized first magnet in the first magnet magnetizing hole of the first magnetizing yoke, pushes the magnetized first magnet out of the first magnet magnetizing hole in the axial direction, and inserts the first magnet into the first magnet hole of the rotor core in a state where the first magnet magnetizing hole and the second magnetizing yoke through hole overlap when viewed in the axial direction.

14. A manufacturing apparatus for a rotating electric rotor as described in claim 13, wherein the second magnetizing yoke is arranged between the first magnetizing yoke and the rotor core in the axial direction, the first magnet magnetized in the first magnet magnetizing hole of the first magnetizing yoke is inserted into the first magnet hole through the second magnetizing yoke through hole in a state where the first magnet magnetizing hole and the first magnet hole are arranged to overlap when viewed in the axial direction, and the second magnet magnetized in the second magnet magnetizing hole of the second magnetizing yoke is inserted into the second magnet hole in a state where the second magnet magnetizing hole and the second magnet hole are arranged to overlap when viewed in the axial direction.

15. A manufacturing device for a rotating electric rotor as described in claim 13, wherein the second magnetizing yoke is formed by the rotor core, the second magnetizing yoke through hole is formed by the first magnet hole, and the second magnet magnetizing hole is formed by the second magnet hole.

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