Divided core for motors, and rotating electric machines

Abstract

The present invention provides a motor-type segmented core and a rotating electric machine that allow for adjustment of the relative positions of multiple segmented cores in a simple shape. [Solution] The motor split core 10 according to the present disclosure has a first end face 102 provided with a protrusion 104 and a second end face 106 provided with a recess 108, and the first end face 102 or the second end face 106 of the motor split core 10 has a first region 110 that protrudes toward the adjacent motor split core 20 when the motor split cores 10 are connected to form a motor core, and a second region 112 located toward the motor split core 10 than the first region 110, and the first region 110 and the second region 112 are continuously provided by a non-contact surface 114 that does not come into contact with the other motor split core 20, and the non-contact surface 114 is provided such that, when viewed from the second region 112 toward the first region 110, the entire surface of the non-contact surface 114 is provided so as to move from the second region 112 toward the first region 110.

Description

[Technical Field]

[0001] The present disclosure relates to a split core for a motor and a rotary electric machine. [Background Art]

[0002] A coil is wound around a tooth portion of a stator core in a rotary electric machine via an insulating material. In this case, by splitting the stator core into a plurality of split cores and winding the coil for each split core, the space factor of the coil and the workability of the coil winding work are improved. Further, when the split cores form an annular stator core, each of the split cores has a recess and a protrusion at both ends extending in the circumferential direction, and the recess and the protrusion of adjacent split cores are fitted to each other.

[0003] However, in a stator core formed of split cores, errors in manufacturing such as dimensional errors of core members may result in insufficient fitting between the recesses and protrusions of adjacent split cores. In addition, it is required to improve the roundness of the inner circumferential surface of the split cores arranged in an annular shape, but it may not be possible to sufficiently improve the roundness due to manufacturing errors such as dimensional errors of core members.

[0004] For example, in the invention described in Patent Document 1, the split core has a pair of inclined sides in which the recess and the protrusion are inclined with respect to the circumferential direction, and a deformed portion is provided on the inclined sides. Further, one of the recess and the protrusion is provided with a slit on the rear side of the deformed portion, and the deformed portion is pressed from the other side of the recess and the protrusion that is not the slit side, and deforms toward the slit side. As a result, a force is applied from the deformed portion deformed toward the slit side to the other of the recess and the protrusion, the position of the split core can be adjusted by the inclined sides, and the roundness of the inner circumferential surface of the split core can be improved. [Prior Art Documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Laid-Open No. 2011-182553 [Brief Summary of the Invention] [Problems that the invention aims to solve]

[0006] However, the invention described in Patent Document 1 has the problem that the shape of the divided core becomes complex because it is necessary to provide deformable parts on the inclined edges of the recesses and protrusions, and to provide slits on the rear side of the deformable parts.

[0007] This disclosure was made to solve the above-mentioned problems and aims to provide a motor-type divided core and a rotating electric machine that can adjust the relative positions of multiple divided cores in a simple shape. [Means for solving the problem]

[0008] The motor split core according to this disclosure is a motor split core having at least one of a first end face provided with a convex portion and a second end face provided with a concave portion, wherein the first or second end face of the motor split core has a first region that protrudes toward the adjacent motor split core when the multiple motor split cores are connected to form a single motor core, and a second region located toward the motor split core than the first region, and the first region and the second region are continuously provided by a non-contact surface that does not come into contact with the other motor split core over its entire surface, and the non-contact surface is provided such that, when viewed from the second region toward the first region, it extends from the second region toward the first region over its entire surface.

[0009] Furthermore, the rotating electric machine according to the present disclosure is characterized by comprising: a cylindrical frame; a motor segment core fixed to the inner circumferential surface of the frame and having a core back portion extending in the circumferential direction of the frame, and a teeth portion provided protruding radially from the inner circumferential surface of the core back portion, wherein at least one of the ends of the core back portion is a first end face or a second end face; an annular stator having an insulating material covering the motor segment core and a coil wound around the motor segment core via the insulating material; and a rotor provided within the stator. [Effects of the Invention]

[0010] According to this disclosure, the motor's segmented core and the rotating electric machine can adjust the relative positions of multiple segmented cores in a simple shape. [Brief explanation of the drawing]

[0011] [Figure 1] This is a cross-sectional view showing part of the structure of a conventional rotating electric machine. [Figure 2] This is a cross-sectional view showing a part of the structure of the rotating electric machine of Embodiment 1. [Figure 3] This is a schematic diagram showing the case where a protrusion of a motor segment core of Embodiment 1 is in contact with a recess of another motor segment core adjacent to that motor segment core. [Figure 4] This is a schematic diagram showing the case where a recess in a motor split core of Embodiment 1 is in contact with a recess in another motor split core adjacent to the said motor split core. [Figure 5] This is a schematic diagram showing the case where a protrusion of a motor division core of Embodiment 1 is in contact with a protrusion of another motor division core adjacent to that motor division core. [Figure 6] This is a schematic diagram showing a conventional motor split core having a deformable section and slits. [Figure 7] This is a schematic diagram showing a part of a rotating electric machine that uses a conventional motor split core having an arc-shaped convex portion and an arc-shaped cutout recess. [Figure 8] This is a schematic diagram showing a part of a rotating electric machine in which the motor split core of Embodiment 2 is used. [Figure 9] This is a schematic diagram showing the case where a protrusion of a motor segment core of Embodiment 2 is in contact with a recess of another motor segment core adjacent to that motor segment core. [Figure 10] This is a schematic diagram showing the case where a recess in a motor split core of Embodiment 2 is in contact with a recess in another motor split core adjacent to that motor split core. [Figure 11]It is a schematic diagram when a rod-shaped member is provided between a recess of the split core for a motor according to Embodiment 2 and a recess of another split core for a motor adjacent to the split core for the motor. [Figure 12] It is a schematic diagram when a projection of the split core for a motor according to Embodiment 2 is in contact with a projection of another split core for a motor adjacent to the split core for the motor. [Figure 13] It is a schematic diagram showing a part of a rotating electric machine in which the split core for a motor according to Embodiment 3 is used. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, a split core for a motor and a rotating electric machine according to embodiments will be described with reference to the drawings. The following embodiments are merely examples, and it is possible to appropriately combine the embodiments and appropriately modify each embodiment. In the drawings, the same reference numerals are given to the same configurations. In each drawing, the relative dimensional relationship, shape, and the like of each component may differ from the actual ones.

[0013] Embodiment 1. The rotating electric machine 1000 according to Embodiment 1 will be described with reference to FIGS. 1 and 2. FIG. 1 is a cross-sectional view showing a part of the structure of a conventional rotating electric machine 2000. FIG. 2 is a cross-sectional view showing a part of the structure of the rotating electric machine 1000 according to Embodiment 1.

[0014] The rotating electric machine 1000 consists of a stator 1 and a rotor 2, etc. The stator 1 is annular in shape and consists of a motor segment core 10, a coil 400, an insulating material 500, and a frame 600. The frame 600 is cylindrical and is provided to surround the stator 1 and rotor 2. The frame 600 may be a shrink-fit frame or a molded resin frame. The motor segment core 10 is a stator core provided at equal intervals in the circumferential direction of the frame 600 and has a core back portion 100 and a teeth portion 300, with a pair of core back portions 100 and teeth portions 300 arranged to form a T shape. In this case, the core back portion 100 is fixed to the inner circumferential surface of the frame 600 and extends in the circumferential direction of the frame 600. The teeth portion 300 is provided projecting radially from the inner circumferential surface side of the core back portion 100 of the frame 600. The coil 400 is wound around the teeth portion 300. The teeth portion 300 is covered with an insulating material 500. That is, the insulating material 500 covers the motor segmented core 10, and the coil 400 is wound around the motor segmented core 10 via the insulating material 500. The insulating material 500 is, for example, insulating paper and an insulator.

[0015] The rotor 2 also has rotor magnets 2a and a rotor core 2b. The rotor magnets 2a are located on the axial side of the stator 1 compared to the motor's segmented core 10. In other words, the rotor magnets 2a are located inside the stator 1. The rotor core 2b is located on the axial side of the stator 1 compared to the rotor magnets 2a. In other words, the rotor core 2b is located inside the rotor magnets 2a. That is, the rotor 2 is located inside the stator 1. The rotor magnets 2a are arranged at equal intervals on the surface of the rotor core 2b, or embedded in insertion holes provided on the inner diameter side of the rotor core 2b.

[0016] In FIG. 1, a core back portion 100 of a divided core 2100 for a motor in a conventional rotating electrical machine 2000 has a first end surface 102 provided with a convex portion 104, and a second end surface 106 provided with a concave portion 108, respectively. The divided core 2100 for a motor is arranged such that the concave portion 108 is fitted to the convex portion 104 of another divided core 2200 for a motor adjacent in the circumferential direction, and the convex portion 104 is fitted to the concave portion 108 of another divided core 2200 for a motor adjacent in the circumferential direction. The position of the inner circumferential surface of the tooth portion 300 is adjusted to achieve a predetermined roundness. Therefore, the convex portion 104 and the concave portion 108 of the core back portion 100 serve to position the divided core 2100 for a motor. However, for example, when the outer diameter of the stator 1 is large and the number of divided cores 2100 for a motor increases, errors in dimensions of core members during manufacturing may prevent the concave portion 108 and the convex portion 104 of adjacent divided cores 2100 for a motor from being sufficiently fitted, and sufficient roundness may not be obtained.

[0017] In particular, when the outer diameter of the stator 1 is large and the number of divided cores 2100 for a motor is large, the influence of errors during manufacturing such as dimensions of core members becomes remarkable. That is, when the outer diameter of the stator 1 is large and the number of divided cores 2100 for a motor is large, the accumulation of tolerances becomes large. For example, consider a case where the outer diameter of the stator 1 is 1 m or more, the number of divided cores 2100 for a motor is 27, and the shrink fit allowance of a frame 600 for fixing the divided cores 2100 for a motor is 1 mm. When the divided cores 2100 for a motor are manufactured with a maximum pressing tolerance of ±20 µm, since the core back portion 100 has two end surfaces, the first end surface 102 and the second end surface 106, the divided core 2100 for a motor is at maximum 40 µm larger than the center dimension in the drawing.

[0018] If 27 motor segment cores 2100 are connected with the above dimensions, the outer diameter of the stator 1 may exceed the 1 mm shrink-fit allowance of the frame 600. In this case, it would be necessary to redesign the shrink-fit allowance of the frame 600 to be larger, but if the shrink-fit allowance is made too large, the strength of the frame 600 will decrease. Also, if the thickness of the frame 600 is increased to increase its strength, the heating time during shrink-fitting of the frame 600 to the stator 1 will increase, or the furnace temperature will need to be increased, which will increase the manufacturing time of the motor segment cores 2100 and lead to increased costs.

[0019] Furthermore, as described above, since errors generally occur in the manufacturing of the motor segment core 2100, all motor segment cores 2100 must be measured to obtain the precision specified in the design, and only those that meet the design specifications must be selected for assembly. This resulted in the production of more motor segment cores 2100 than necessary, leading to poor yield. In particular, in the case of large rotating electric machines 2000 with an outer diameter of stator 1 exceeding 1m, manufacturing errors in the motor segment core 2100 sometimes prevented assembly into a perfect circle.

[0020] Therefore, according to the motor split core 10 of Embodiment 1, the relative position with other adjacent motor split cores 20 can be adjusted with a simple shape in order to suppress the accumulation of tolerances. This will be explained in detail below. In the following, for convenience, the motor split core 10 and other motor split cores 20 adjacent to the motor split core 10 will be explained separately, but there is no difference in shape or other aspects between the two. When not specifically distinguishing between the two, they will simply be referred to as motor split core 10.

[0021] First, as shown in Figure 2, the motor split core 10 of Embodiment 1, like the motor split core 2100 in the conventional rotating electric machine 2000, has a core back portion 100 that has a first end face 102 with a protrusion 104 and a second end face 106 with a recess 108. As will be described in detail later, it is not necessary for all motor split cores 10 to have a first end face 102 and a second end face 106; it is sufficient for at least two or more motor split cores 10 to have at least one of the first end face 102 and the second end face 106.

[0022] Furthermore, in the conventional rotating electric machine 2000 shown in Figure 1, all motor segmented cores 2100 are arranged in a ring shape so that they face the same direction in the circumferential direction, whereas in the rotating electric machine 1000 of Embodiment 1, as shown in Figure 2, there is a motor segmented core 10 that is arranged so that it faces the opposite direction to other adjacent motor segmented cores 20 in the circumferential direction. That is, there are three cases in which the convex portion 104 of the motor segmented core 10 is in contact with the concave portion 108 of the adjacent motor segmented core 20, the concave portion 108 of the motor segmented core 10 is in contact with the concave portion 108 of the adjacent motor segmented core 20, and the convex portion 104 of the motor segmented core 10 is in contact with the convex portion 104 of the adjacent motor segmented core 20.

[0023] Furthermore, since the motor segmented core 10 is assembled into a ring shape after the coil 400 is wound around it, the direction in which the terminal wires emerge is reversed. In this case, prioritizing yield, one method is to pre-measure all motor segmented cores 10 and pre-determine which motor segmented cores 10 will be positioned in the reverse direction, and only those motor segmented cores 10 will have the terminal wires emerging in the opposite direction from the normal direction. Alternatively, prioritizing processing time, one method is to manufacture two types of motor segmented cores 10: those with the terminal wires emerging in the normal direction and those with the terminal wires emerging in the opposite direction, without pre-determining which motor segmented cores 10 will be positioned in the reverse direction. These methods may be appropriately selected depending on the number of rotating electric machines 1000 to be mass-produced and the availability of personnel.

[0024] Figure 3 is a schematic diagram showing the case where the protrusion 104 of the motor split core 10 of Embodiment 1 is in contact with the recess 108 of another motor split core 20 adjacent to the motor split core 10. Figure 4 is a schematic diagram showing the case where the recess 108 of the motor split core 10 of Embodiment 1 is in contact with the recess 108 of another motor split core 20 adjacent to the motor split core 10. Figure 5 is a schematic diagram showing the case where the protrusion 104 of the motor split core 10 of Embodiment 1 is in contact with the protrusion 104 of another motor split core 20 adjacent to the motor split core 10.

[0025] As shown in Figures 3, 4, and 5, the first end face 102 or the second end face 106 of the motor segmented core 10 (not shown in Figure 3, but the portion of the motor segmented core 10 where the recess 108 is provided) has a first region 110 that protrudes toward the adjacent motor segmented core 20 when multiple motor segmented cores 10 are connected to form a single motor core, and a second region 112 located toward the motor segmented core 10 than the first region 110.

[0026] Furthermore, the first region 110 of the motor split core 10 is, as shown in Figures 3 and 5, the surface of the protrusion 104 on the first end face 102 that protrudes toward the other motor split core 20, or, as shown in Figure 4, the surface of the second end face 106 other than the recess 108. The second region 112 is, as shown in Figures 3 and 5, the surface of the first end face 102 other than the protrusion 104, or, as shown in Figure 4, the bottom surface of the recess 108 on the second end face 106.

[0027] Figure 6 is a schematic diagram showing a conventional motor split core 2101 having a deformable portion 2022 and a slit 2024. The motor split core 2101 in Figure 6 is the one illustrated in the aforementioned Japanese Patent Application Publication No. 2011-182553, shown in Patent Document 1. In Figure 6, the first end face 102 of the motor split core 2101 having a convex portion 104 has a first region 110 that protrudes toward the adjacent motor split core 2201, and a second region 112 that is located toward the motor split core 2101 than the first region 110, and the first region 110 and the second region 112 are continuously provided by the deformable portion 2022. However, because the deformable portion 2022 has a contact surface that contacts the other motor split core 2201, there is no space for the motor split core 2101 to move between the motor split core 2101 and the other motor split core 2201.

[0028] Therefore, as shown in Figures 3, 4, and 5, the first region 110 and the second region 112 of the motor split core 10 of Embodiment 1 are continuously provided by a non-contact surface 114 that does not come into contact with the other motor split core 20 over its entire surface. In other words, the non-contact surface 114 does not have a surface that comes into contact with the other motor split core 20. As a result, the motor split core 10 has space to move radially in the frame 600 when its first end face 102 or second end face 106 comes into contact with the first end face 102 or second end face 106 of the other motor split core 20, so that its relative position to the adjacent motor split core 20 can be adjusted.

[0029] Furthermore, in Figure 6, as indicated by the arrows in the figure, when the deformable portion 2022 is viewed from the second region 112 side toward the first region 110 side, it has a slit 2024, and as indicated by the white arrows, it consists of a surface provided that extends from the second region 112 toward the first region 110, and as indicated by the hatched arrows, a surface provided that extends from the first region 110 toward the second region 112. However, when the deformable portion 2022 is viewed from the second region 112 side toward the first region 110 side, the motor split core 2101 has a complex shape due to the presence of the surface provided that extends from the first region 110 toward the second region 112, as described above.

[0030] Therefore, as shown in Figures 3, 4, and 5, the non-contact surface 114 of Embodiment 1 is provided such that, when viewed from the second region 112 towards the first region 110, the entire surface of the non-contact surface 114 faces from the second region 112 towards the first region 110, as indicated by the arrows in the figures. In other words, when viewed from the second region 112 towards the first region 110, the non-contact surface 114 does not have a surface that faces from the first region 110 towards the second region 112, as indicated by the hatched arrows in Figure 6. This allows the motor split core 10 to adjust its relative position to other motor split cores 20 with a simpler shape.

[0031] Furthermore, as shown in Figure 3, when a recess 108 of another motor split core 20 adjacent to a protrusion 104 of a motor split core 10 comes into contact, the second region 112 of the first end face 102 of the motor split core 10 comes into contact with the first region 110 of the second end face 106 of the other motor split core 20, where the recess 108 is provided, which protrudes toward the motor split core 10 as seen from the other motor split core 20. In other words, when a recess 108 of another motor split core 20 adjacent to a protrusion 104 of a motor split core 10 comes into contact, at least the surface of the first end face 102 of the motor split core 10 other than the protrusion 104, and the surface of the second end face 106 of the other motor split core 20 other than the recess 108, come into contact.

[0032] Furthermore, Figure 3A is a schematic diagram of the case when the motor segment core 10 moves away from the rotation axis in the radial direction of the frame 600 relative to the other motor segment core 20, and Figure 3B is a schematic diagram of the case when the motor segment core 10 moves towards the rotation axis in the radial direction of the frame 600 relative to the other motor segment core 20. As shown in Figures 3A and 3B, even if one of the surfaces connecting the first region 110 and the second region 112 of the motor segment core 10 contacts the other motor segment core 20, the other surface becomes a non-contact surface 114 that does not contact the other motor segment core 20 over its entire surface. In addition, although not shown in Figures 3A and 3B, both of the surfaces connecting the first region 110 and the second region 112 of the motor segment core 10 may become non-contact surfaces 114 that do not contact the other motor segment core 20 over its entire surface.

[0033] Furthermore, as shown in Figure 4, when a recess 108 of one motor split core 10 comes into contact with a recess 108 of another motor split core 20 adjacent to it, the first region 110 of the second end face 106 of the motor split core 10 comes into contact with the first region 110 of the second end face 106 of the other motor split core 20 that protrudes toward the motor split core 10 when viewed from the other motor split core 20. In other words, when a recess 108 of one motor split core 10 comes into contact with a recess 108 of another motor split core 20 adjacent to it, the surface of the second end face 106 of the motor split core 10 other than the recess 108 comes into contact with the surface of the second end face 106 of the other motor split core 20 other than the recess 108.

[0034] Furthermore, as shown in Figure 5, when a protrusion 104 of one motor-split core 10 comes into contact with a protrusion 104 of another motor-split core 20 adjacent to it, the first region 110 of the first end face 102 of the motor-split core 10 comes into contact with the first region 110 of the first end face 102 of the other motor-split core 20, which is provided with the protrusion 104, and which protrudes toward the motor-split core 10 when viewed from the other motor-split core 20. In other words, when a protrusion 104 of one motor-split core 10 comes into contact with a protrusion 104 of another motor-split core 20 adjacent to it, the surface of the protrusion 104 of the first end face 102 of the motor-split core 10 that protrudes toward the other motor-split core 20 comes into contact with the surface of the protrusion 104 of the first end face 102 of the other motor-split core 20 that protrudes toward the motor-split core 10.

[0035] Note that the contact points between the motor split core 10 and other adjacent motor split cores 20 shown in Figures 4 and 5 are illustrated large for illustrative purposes, but in reality, they are magnetic paths through which magnetic flux passes, so it is preferable that they be the minimum necessary size.

[0036] Thus, the motor split core 10 in Embodiment 1 is a motor split core 10 having at least one of a plurality of divided motor split cores 10, which has a first end face 102 on which a convex portion 104 is provided and a second end face 106 on which a concave portion 108 is provided. The first end face 102 or the second end face 106 of the motor split core 10 has a first region 110 that protrudes toward the adjacent motor split core 20 when the plurality of motor split cores 10 are connected to form a single motor core, and a second region 112 that is located toward the motor split core 10 than the first region 110. The first region 110 and the second region 112 are continuously provided by a non-contact surface 114 that does not come into contact with the other motor split core 20 over its entire surface. When the non-contact surface 114 is viewed from the second region 112 toward the first region 110, it is provided so that it extends from the second region 112 toward the first region 110 over its entire surface.

[0037] With the above configuration, the motor segmented core 10 in Embodiment 1 has no non-contact surface 114 that contacts other motor segmented cores 20. Therefore, when the first end face 102 or the second end face 106 comes into contact with the first end face 102 or the second end face 106 of another motor segmented core 20, there is space for movement in the radial direction of the frame 600, allowing the relative position to be adjusted with respect to other motor segmented cores 20. Furthermore, when viewing the non-contact surface 114 of the motor segmented core 10 in Embodiment 1 from the second region 112 side toward the first region 110 side, the non-contact surface 114 does not have a surface that faces from the first region 110 toward the second region 112. Therefore, the relative position to other motor segmented cores 20 can be adjusted with a simpler shape. In other words, the motor segmented core 10 of Embodiment 1 allows for the adjustment of the relative positions of multiple segmented cores with a simple shape.

[0038] Furthermore, this allows the motor segmented core 10 of Embodiment 1 to improve the roundness of its inner surface, and the air gap between the stator 1 and the rotor 2 to be designed to the minimum necessary width, thereby increasing torque density and enabling the provision of a smaller and less expensive, or a more efficient, rotating electric machine 1000 of the same size. In addition, the motor segmented core 10 of Embodiment 1 can improve the yield during the manufacturing of the motor segmented core 10, and since it is no longer necessary to measure all of the motor segmented cores 10, man-hours can be reduced. Moreover, the motor segmented core 10 of Embodiment 1 allows for a larger adjustment range for adjusting the positions of multiple segmented cores compared to, for example, the conventional motor segmented core 2101 shown in Figure 6.

[0039] Furthermore, in the motor split core 10 of Embodiment 1, the second region 112 of the first end face 102 contacts the first region 110 of the second end face 106 of the other motor split core 20, which is provided with a recess 108, and which protrudes toward the motor split core 10 side when viewed from the other motor split core 20. With the above configuration, the motor split core 10 of Embodiment 1 can adjust the relative positions of multiple split cores with a simple shape.

[0040] Furthermore, in the motor split core 10 of Embodiment 1, the first region 110 of the second end face 106 contacts the first region 110 of the second end face 106 of the other motor split core 20, which is provided with a recess 108, and which protrudes toward the motor split core 10 side when viewed from the other motor split core 20. With the above configuration, the motor split core 10 of Embodiment 1 can adjust the relative positions of multiple split cores with a simple shape.

[0041] Furthermore, in the motor split core 10 of Embodiment 1, the first region 110 of the first end face 102 contacts the first region 110 of the first end face 102 of the other motor split core 20, which is provided with a protrusion 104, and which protrudes toward the motor split core 10 side when viewed from the other motor split core 20. With the above configuration, the motor split core 10 in Embodiment 1 can adjust the relative positions of multiple split cores with a simple shape.

[0042] Furthermore, in the motor split core 10 of Embodiment 1, the first region 110 is the surface of the protrusion 104 on the first end face 102 that protrudes toward the other motor split core 20, or the surface of the second end face 106 other than the recess 108, and the second region 112 is the surface of the first end face 102 other than the protrusion 104, or the bottom surface of the recess 108 on the second end face 106. With the above configuration, the motor split core 10 of Embodiment 1 can adjust the relative positions of multiple split cores with a simple shape.

[0043] Furthermore, the rotating electric machine 1000 of Embodiment 1 comprises a cylindrical frame 600, a motor segmented core 10 fixed to the inner circumferential surface of the frame 600 and having a core back portion 100 extending in the circumferential direction of the frame 600, and a tooth portion 300 provided protruding radially from the inner circumferential surface of the core back portion 100, with at least one of the ends of the core back portion 100 being a first end face 102 or a second end face 106, an annular stator 1 having an insulating material 500 covering the motor segmented core 10, and a coil 400 wound around the motor segmented core 10 via the insulating material 500, and a rotor 2 provided within the stator 1. With the above configuration, the rotating electric machine 1000 of Embodiment 1 can adjust the relative positions of multiple segmented cores in a simple shape.

[0044] Although the motor split core 10 in Embodiment 1 was described as a split core applied to a rotating electric machine 1000, it is not limited to this. That is, for example, the motor split core 10 in Embodiment 1 may be applied to a linear motor. Even in this case, the motor split core 10 in Embodiment 1 can adjust the relative positions of multiple split cores with a simple shape.

[0045] Furthermore, although the motor segmented core 10 in Embodiment 1 was described as a stator core constituting the stator 1, it is not limited to this. That is, for example, the motor segmented core 10 in Embodiment 1 may be used as a segmented core constituting the rotor 2 or the movable element. Even in this case, the motor segmented core 10 in Embodiment 1 has a simple shape and allows for adjustment of the relative positions of multiple segmented cores.

[0046] Embodiment 2. The motor split core 11 in Embodiment 2 will now be described. The motor split core 11 of the rotating electric machine 1001 in Embodiment 2 differs from the motor split core 10 of the rotating electric machine 1000 in Embodiment 1 in that the protrusion 104 provided on the first end face 102 is arc-shaped, and the recess 108 provided on the second end face 106 is an arc-shaped cutout. Components similar to those in Embodiment 1 are denoted by the same reference numerals. A detailed explanation of components similar to those in Embodiment 1 will be omitted, and the differences from Embodiment 1 will be described primarily.

[0047] Figure 7 is a schematic diagram showing a part of a rotating electric machine 2002 that uses a conventional motor split core 2102 having an arc-shaped protrusion 104 and an arc-shaped cutout recess 108. As shown in Figure 7, in the conventional structure, the arc-shaped protrusion 104 provided on the first end face 102 of the motor split core 2102 comes into contact with the arc-shaped cutout recess 108 provided on the second end face 106 of another motor split core 2202 adjacent to it. This allows the other motor split core 2202 to rotate around the arc-shaped protrusion 104 of the motor split core 2102 as an axis, making it easy to wind the coil 400 around the teeth portion 300 with the annularly arranged motor split cores 2102 opened in a straight line, and then rotate it again to return it to an annular shape.

[0048] Figure 8 is a schematic diagram showing a part of a rotating electric machine 1001 in which the motor split core 11 of Embodiment 2 is used. Figure 9 is a schematic diagram showing the case when the protrusion 104 of the motor split core 11 of Embodiment 2 is in contact with the recess 108 of another motor split core 21 adjacent to the motor split core 11. Figure 10 is a schematic diagram showing the case when the recess 108 of the motor split core 11 of Embodiment 2 is in contact with the recess 108 of another motor split core 21 adjacent to the motor split core 11. Figure 11 is a schematic diagram showing the case when a rod-shaped member 700 is provided between the recess 108 of the motor split core 11 of Embodiment 2 and the recess 108 of another motor split core 21 adjacent to the motor split core 11. Figure 12 is a schematic diagram showing the case when the protrusion 104 of the motor split core 11 of Embodiment 2 is in contact with the protrusion 104 of another motor split core 21 adjacent to the motor split core 11.

[0049] In Figure 7, in the conventional rotating electric machine 2002, all motor segmented cores 2102 are arranged in a ring shape so that they face the same direction in the circumferential direction. In contrast, in the rotating electric machine 1001 of Embodiment 2, as shown in Figure 8, there is a motor segmented core 11 that is arranged so that it faces the opposite direction to other adjacent motor segmented cores 21 in the circumferential direction. That is, there are three cases in which the convex portion 104 of motor segmented core 11 is in contact with the concave portion 108 of another motor segmented core 21 adjacent to it, the concave portion 108 of motor segmented core 11 is in contact with the concave portion 108 of another motor segmented core 21 adjacent to it, and the convex portion 104 of motor segmented core 11 is in contact with the convex portion 104 of another motor segmented core 21 adjacent to it.

[0050] Furthermore, as shown in Figures 8, 9, 10, 11, and 12, the motor split core 11 of Embodiment 2 has an arc-shaped protrusion 104 on the first end face 102 and an arc-shaped recess 108 on the second end face 106. In addition, on the first end face 102 or the second end face 106 of the motor split core 11 of Embodiment 2, the first region 110 that protrudes toward the adjacent motor split core 21, the second region 112 located toward the motor split core 11 than the first region 110, and the non-contact surface 114 which is provided so as to be continuous with the first region 110 and the second region 112 and does not come into contact with the other motor split core 21 over its entire surface, all exist on a single curved surface.

[0051] Even in this case, as shown in Figures 8, 9, 10, and 11, the motor split core 11 of Embodiment 2 is provided with a non-contact surface 114 that does not come into contact with the other motor split core 21 over its entire surface, similar to Embodiment 1, with the first region 110 and the second region 112 being continuously provided with a non-contact surface 114 that does not come into contact with the other motor split core 21 over its entire surface. When the non-contact surface 114 is viewed from the second region 112 side toward the first region 110 side, it can be said that the non-contact surface 114 is provided so that it comes into contact with the second region 112 toward the first region 110 over its entire surface. Therefore, the motor split core 11 of Embodiment 2 has space for movement in the radial direction of the frame 600 when the first end face 102 or the second end face 106 comes into contact with the first end face 102 or the second end face 106 of the other motor split core 21, so that its relative position to the other motor split core 21 can be adjusted. Furthermore, since the non-contact surface 114 is provided so that it extends from the second region 112 to the first region 110 when viewed from the second region 112 to the first region 110, a space exists near the non-contact surface 114, allowing for adjustment of its relative position to other motor-type divided cores 21 with a simpler shape.

[0052] As shown in Figure 9, when the arc-shaped protrusion 104 of the motor split core 11 comes into contact with the arc-shaped cutout recess 108 of the adjacent motor split core 21, the second region 112 of the first end face 102 of the motor split core 11 comes into contact with the first region 110 of the second end face 106 of the other motor split core 21, where the recess 108 is provided, which protrudes toward the motor split core 11 side as viewed from the other motor split core 21. That is, the first end face 102 of the motor split core 11, where the arc-shaped protrusion 104 is provided, and the second end face 106 of the other motor split core 21, where the arc-shaped cutout recess 108 is provided, each have a contact surface that comes into contact with each other and a non-contact surface 114 that does not come into contact with each other.

[0053] Furthermore, as shown in Figure 10, when an arc-shaped cutout recess 108 of one motor split core 11 comes into contact with an arc-shaped cutout recess 108 of another motor split core 21 adjacent to it, the first region 110 of the second end face 106 of the motor split core 11 comes into contact with the first region 110 of the second end face 106 of the other motor split core 21 that protrudes toward the motor split core 11 side as viewed from the other motor split core 21. In other words, the second end face 106 of the motor split core 11 that has the arc-shaped cutout recess 108, and the second end face 106 of the other motor split core 21 that has the arc-shaped cutout recess 108, each have a contact surface that comes into contact with each other and a non-contact surface 114 that does not come into contact with each other.

[0054] In this case, as shown in Figure 11, the motor split core 11 may include a rod-shaped member 700 made of magnetic material having the same axial length as the motor split core 11, between the arc-shaped cutout recess 108 of the motor split core 11 and the arc-shaped cutout recess 108 of the adjacent motor split core 21. That is, the motor split core 11 may further include a rod-shaped member 700 made of magnetic material, provided between the second end face 106 of the motor split core 11 having an arc-shaped cutout and the second end face 106 of the other motor split core 21 having an arc-shaped cutout recess 108.

[0055] The rod-shaped member 700 is made of laminated electromagnetic copper plates or the like to reduce iron loss. The rod-shaped member 700 is also provided, for example, when connecting motor segment cores 11 to form a single motor core, or after forming a single motor core, so as to be sandwiched between the arc-shaped cutout recess 108 of the motor segment core 11 and the arc-shaped cutout recess 108 of the adjacent motor segment core 21.

[0056] Furthermore, as shown in Figure 12, when an arc-shaped protrusion 104 of one motor segment core 11 comes into contact with an adjacent arc-shaped protrusion 104 of another motor segment core 21, the first region 110 of the first end face 102 of the motor segment core 11 comes into contact with the first region 110 of the first end face 102 of the other motor segment core 21, which is provided with the protrusion 104, and which protrudes toward the motor segment core 11 side as viewed from the other motor segment core 21. In other words, the first end face 102 of the motor segment core 11, provided with the arc-shaped protrusion 104, and the first end face 102 of the other motor segment core 21, provided with the arc-shaped protrusion 104, each have a contact surface that comes into contact with each other and a non-contact surface 114 that does not come into contact with each other.

[0057] The motor split core 11 in Embodiment 2 is similar to Embodiment 1 in that, among a plurality of divided motor split cores 11, the motor split core 11 has at least one of a first end face 102 provided with a convex portion 104 and a second end face 106 provided with a concave portion 108. The first end face 102 or the second end face 106 of the motor split core 11 has a first region 110 that protrudes toward the adjacent motor split core 21 when the plurality of motor split cores 11 are connected to form a single motor core, and a second region 112 located toward the motor split core 11 than the first region 110. The first region 110 and the second region 112 are continuously provided by a non-contact surface 114 that does not come into contact with the other motor split core 21 over its entire surface. When the non-contact surface 114 is viewed from the second region 112 toward the first region 110, it is provided so that it extends from the second region 112 toward the first region 110 over its entire surface.

[0058] With the above configuration, the motor segmented core 11 in Embodiment 2 does not have a non-contact surface 114 that contacts other motor segmented cores 21. Therefore, when the first end face 102 or the second end face 106 comes into contact with the first end face 102 or the second end face 106 of another motor segmented core 21, there is space for movement in the radial direction of the frame 600, allowing adjustment of the relative position to other motor segmented cores 21. Furthermore, in Embodiment 2, when the non-contact surface 114 is viewed from the second region 112 side toward the first region 110 side, the non-contact surface 114 does not have a surface that faces from the first region 110 toward the second region 112. Therefore, the relative position to other motor segmented cores 21 can be adjusted with a simpler shape. In other words, the motor segmented core 11 of Embodiment 2 allows for adjustment of the relative positions of multiple segmented cores with a simple shape.

[0059] Furthermore, in the motor split core 11 of the second embodiment, the protrusion 104 provided on the first end face 102 is arc-shaped, and the recess 108 provided on the second end face 106 is an arc-shaped cutout, and the first region 110, the non-contact surface 114, and the second region 112 are located on a single curved surface. With the above configuration, the motor split core 11 of the second embodiment can adjust the relative positions of multiple split cores with a simple shape.

[0060] Furthermore, the motor split core 11 of the second embodiment further comprises a rod-shaped member 700 made of magnetic material, provided between a second end face 106 having a recess 108 which is an arc-shaped cutout in the motor split core 11 and the second end face 106 having a recess 108 which is an arc-shaped cutout in the other motor split core 21. With the above configuration, the motor split core 11 of the second embodiment can rotate around the rod-shaped member 700 as an axis, so that its relative position to the other motor split core 21 can be easily adjusted.

[0061] The diameter and length of the rod-shaped member 700 are not particularly limited and may be appropriately selected to adjust the position of the motor division core 11 and other adjacent motor division cores 21.

[0062] Embodiment 3. The motor split core 12 in Embodiment 3 will now be described. The motor split core 12 of the rotating electric machine 1002 in Embodiment 3 differs from the motor split core 10 of the rotating electric machine 1000 in Embodiment 1 in that the motor split core 12 of the rotating electric machine 1002 is connected to each other via connecting portions 800 provided at the ends to form a single motor core. Components similar to those in Embodiment 1 are denoted by the same reference numerals. A detailed explanation of components similar to those in Embodiment 1 will be omitted, and the explanation will mainly focus on components that differ from those in Embodiment 1.

[0063] Figure 13 is a schematic diagram showing a part of a rotating electric machine 1002 in which the motor segment core 12 of Embodiment 3 is used. As shown in Figure 13, each of the multiple motor segment cores 12 is connected to each other via connecting portions 800 provided at their ends to form a single motor core. The connecting portion 800 is formed, for example, by providing thin-walled portions at each end of the multiple motor segment cores 12, and overlapping and fixing these thin-walled portions together.

[0064] In this case, the motor split cores 12 located at both ends of a single motor core have a first end face 102 or a second end face 106 on the end that does not have the connecting portion 800 of the core back portion 100. As a result, the convex portion 104 or concave portion 108 of the motor split core 12 at the end that does not have the connecting portion 800 of the core back portion 100 contacts the concave portion 108 of the adjacent motor split core 22, thus allowing adjustment of the relative position to other motor split cores 22. In other words, it is not necessary for all motor split cores 12 to have a first end face 102 and a second end face 106; it is sufficient for at least two or more motor split cores 12 to have at least one of the first end face 102 and the second end face 106.

[0065] The motor split core 12 in Embodiment 3 is similar to Embodiment 1 in that, among a plurality of divided motor split cores 12, the motor split core 12 has at least one of a first end face 102 provided with a convex portion 104 and a second end face 106 provided with a concave portion 108. The first end face 102 or the second end face 106 of the motor split core 12 has a first region 110 that protrudes toward the adjacent motor split core 22 when the plurality of motor split cores 12 are connected to form a single motor core, and a second region 112 located toward the motor split core 12 side than the first region 110. The first region 110 and the second region 112 are continuously provided by a non-contact surface 114 that does not come into contact with the other motor split core 22 over its entire surface. When the non-contact surface 114 is viewed from the second region 112 toward the first region 110, it is provided so that it extends from the second region 112 toward the first region 110 over its entire surface.

[0066] With the above configuration, the motor segmented core 12 in Embodiment 3 has no surface on the non-contact surface 114 that contacts other motor segmented cores 22. Therefore, when the first end surface 102 or the second end surface 106 comes into contact with the first end surface 102 or the second end surface 106 of another motor segmented core 22, there is space for movement in the radial direction of the frame 600, allowing adjustment of the relative position to other motor segmented cores 22. Furthermore, in Embodiment 3, when the non-contact surface 114 is viewed from the second region 112 side toward the first region 110 side, the non-contact surface 114 does not have a surface extending from the first region 110 toward the second region 112. Therefore, the relative position to other motor segmented cores 22 can be adjusted with a simpler shape. In other words, the motor segmented core 12 of Embodiment 3 allows for adjustment of the relative positions of multiple segmented cores with a simple shape.

[0067] Furthermore, in the motor segmented core 12 of Embodiment 3, each of the multiple motor segmented cores 12 is connected to one another via connecting portions 800 provided at their ends to form a single motor core, and the motor segmented cores 12 located at both ends of the single motor core have a first end face 102 or a second end face 106 at the end that does not have a connecting portion 800. With the above configuration, since the multiple motor segmented cores 12 of Embodiment 3 are connected to one another via connecting portions 800, it is possible to improve the workability when winding a coil 400 around the teeth portion 300 of each of the multiple motor segmented cores 12 and arranging the multiple motor segmented cores 12 in a ring shape to manufacture a single motor core.

[0068] (Note 1) A motor split core having at least one of a divided motor split core, which includes a first end face having a protrusion and a second end face having a recess, The first or second end face of the motor division core has a first region that protrudes toward the adjacent motor division core when the plurality of motor division cores are connected to form a single motor core, and a second region that is located toward the motor division core than the first region. The first region and the second region are provided continuously by a non-contact surface that does not come into contact with the other motor split core over its entire surface. The non-contact surface is provided such that, when viewed from the second region towards the first region, it extends from the second region to the first region across its entire surface. Split core for motors. (Note 2) The second region of the first end face contacts the first region of the second end face of the other motor split core, which is provided with a recess of the other motor split core, and which protrudes toward the motor split core when viewed from the other motor split core. The motor split core described in Appendix 1. (Note 3) The first region of the second end face contacts the first region of the second end face on which the recess of the other motor split core is provided, which protrudes toward the motor split core when viewed from the other motor split core. A motor split core as described in Appendix 1 or Appendix 2. (Note 4) The first region of the first end face contacts the first region of the first end face of the other motor split core, which is provided with a protrusion, and which protrudes toward the motor split core when viewed from the other motor split core. A motor split core as described in any one of the items from Appendix 1 to Appendix 3. (Note 5) The convex portion is arc-shaped, the concave portion is an arc-shaped cutout, and the first region, the non-contact surface, and the second region are located on a single curved surface. A motor split core as described in any one of the items from Appendix 1 to Appendix 4. (Note 6) The motor split core further comprises a rod-shaped member made of magnetic material, provided between the second end face having the recess which is the shape of the cutout of the arc in the motor split core and the second end face having the recess which is the shape of the cutout of the arc in the other motor split core, The motor split core described in Appendix 5. (Note 7) Each of the aforementioned plurality of motor division cores is connected to one another via connecting portions provided at their ends to form the single motor core. A motor split core located at both ends of the single motor core, having the first end face or the second end face at the end that does not have the connecting portion, A motor split core as described in any one of the items from Appendix 1 to Appendix 6. (Note 8) The first region is the surface of the protrusion on the first end face that protrudes toward the other motor split core, or the surface of the second end face other than the recess. The second region is the surface of the first end face other than the protrusion, or the bottom surface of the recess on the second end face. A motor split core as described in any one of the items from Appendix 1 to Appendix 4. (Note 9) A motor split core as described in any one of Appendix 1 to Appendix 8, comprising a cylindrical frame, a core back portion fixed to the inner circumferential surface of the frame and extending in the circumferential direction of the frame, and a teeth portion provided protruding radially from the inner circumferential surface of the core back portion, wherein at least one of the ends of the core back portion is the first end face or the second end face, an annular stator having an insulating material covering the motor split core, and a coil wound around the motor split core via the insulating material, A rotor provided within the stator, A rotating electric machine equipped with the following features. [Explanation of Symbols]

[0069] 1000, 1001, 1002 Rotating electric machine, 1 Stator, 10, 11, 12 Split core for motor, 100 Core back section, 102 First end face, 104 Convex section, 106 Second end face, 108 Recessed section, 110 First region, 112 Second region, 114 Non-contact surface, 300 Teeth section, 400 Coil, 500 Insulating material, 600 Frame, 20, 21, 22 Split core for other motors, 2 Rotor, 2a Rotor magnet, 2b Rotor core, 700 Rod-shaped member, 800 Connecting section, 2000, 2002 Conventional rotating electric machine, 2100, 2101, 2102 Conventional split core for motor, 2201, 2202 Conventional split core for other motors, 2022 Conventional deformable section, 2024 Conventional slit

Claims

1. A motor split core having at least one of a plurality of divided motor split cores, the first end face having a protrusion and the second end face having a recess, The first or second end face of the motor division core has a first region that protrudes toward the adjacent motor division core when the plurality of motor division cores are connected to form a single motor core, and a second region that is located toward the motor division core than the first region. The first region and the second region are continuously provided by a non-contact surface that does not come into contact with the other motor split core over its entire surface. The non-contact surface is provided such that, when viewed from the second region towards the first region, it extends from the second region to the first region across its entire surface. Split core for motors.

2. The second region of the first end face contacts the first region of the second end face of the other motor split core, which is provided with a recess of the other motor split core, and which protrudes toward the motor split core when viewed from the other motor split core. A divided core for a motor according to claim 1.

3. The first region of the second end face contacts the first region of the second end face on which the recess of the other motor split core is provided, which protrudes toward the motor split core when viewed from the other motor split core. A divided core for a motor according to claim 1.

4. The first region of the first end face contacts the first region of the other motor split core on which the protrusion of the other motor split core is provided, which protrudes toward the motor split core when viewed from the other motor split core. A divided core for a motor according to claim 1.

5. The convex portion is arc-shaped, the concave portion is an arc-shaped cutout, and the first region, the non-contact surface, and the second region are located on a single curved surface. A divided core for a motor according to claim 1.

6. The motor split core further comprises a rod-shaped member made of magnetic material, provided between the second end face having the recess which is the shape of the cutout of the arc in the motor split core and the second end face having the recess which is the shape of the cutout of the arc in the other motor split core, A divided core for a motor according to claim 5.

7. Each of the aforementioned plurality of motor division cores is connected to one another via connecting portions provided at their ends to form the single motor core. A motor split core located at both ends of the single motor core, having the first end face or the second end face at the end that does not have the connecting portion, A divided core for a motor according to claim 1.

8. The first region is the surface of the protrusion on the first end face that protrudes toward the other motor split core, or the surface of the second end face other than the recess. The second region is the surface of the first end face other than the protrusion, or the bottom surface of the recess on the second end face. A divided core for a motor according to claim 1.

9. A motor split core according to any one of claims 1 to 8, comprising a cylindrical frame, a core back portion fixed to the inner circumferential surface of the frame and extending in the circumferential direction of the frame, and a teeth portion provided protruding radially from the inner circumferential surface of the core back portion, wherein at least one of the ends of the core back portion is the first end face or the second end face, and an annular stator comprising an insulating material covering the motor split core, and a coil wound around the motor split core via the insulating material, A rotor provided within the stator, A rotating electric machine equipped with the following features.

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