Stator core for rotating electrical machine, stator, and rotating electrical machine

Abstract

Fastening sections (5) which protrude outward in the radial direction (Y) and which have fastening holes (51) for fastening the core plates (8) to each other in the lamination direction (Z) are formed on the outer peripheral side of the core plates (8), the number M of the fastening sections (5) in the circumferential direction (X) is three or more (where M is an integer and has a relationship of N > = M. The divided core section (10) has a plurality of types of divided core sections (1, 2) with fastening sections, in the core plate (8), the fastening parts (5) are disposed at a plurality of different positions away from a center line (Q1) connecting the rotational center axis (Q) of the rotating electrical machine (90) and the center in the circumferential direction of the divided core part (10), and the fastening parts (5) of different types of divided core parts (1, 2) with fastening parts are stacked up and down in the stacking direction (Z). The abutting portions (L1, L2) of the divided core portions (8) are disposed at different positions in the circumferential direction (X) in the vertical direction in the stacking direction (Z), and the fastening holes (51) of the fastening portions (5) are formed so as to communicate with each other in the stacking direction (Z).

Description

Technical Field

[0001] The present application relates to a stator core of a rotating electric machine, a stator, and a rotating electric machine. Background Art

[0002] Conventional stator cores, stators, and rotating electrical machines of rotating electrical machines have mostly used fan-shaped split cores split in the circumferential direction for reasons such as improving material yield and improving assembly of windings. In addition, when the stator core is fixed to a frame as a housing by bolts, the following structure is known: a fastening portion having fastening holes for coupling to the frame is provided on the outer diameter portion of the stator core, and the split cores are alternately overlapped (brick-like stacking (Japanese: レンガ積み)) (see, for example, Patent Document 1). Prior art literature Patent Literature

[0003] Patent Document 1: Japanese Patent No. 5609619 Summary of the invention Technical problem to be solved by the invention

[0004] In order to improve the material yield of the split core with the fastening part, the conventional stator core, stator and rotating electric machine need to increase the number of divisions. However, when the number of divisions is increased or when a thick wall portion is provided to ensure the rigidity of the fastening part, the fastening parts arranged near the two ends of the split core need to be extremely small, and there is a problem that the number and shape of the fastening parts with the frame as the housing cannot be arbitrarily designed. Therefore, there is a problem that it is impossible to achieve both the improvement of the material yield and the design freedom of the fastening part.

[0005] The present application discloses a technology for solving the above-mentioned technical problems, and an object of the present application is to provide a stator core of a rotating electric machine, a stator, and a rotating electric machine capable of achieving both improvement in material yield and freedom in design of a fastening portion. Technical solutions adopted to solve technical problems

[0006] In the stator core of the rotating electrical machine disclosed in the present application, The stator core is formed by laminating a plurality of core plates in the axial direction. The core plate is formed by arranging split core parts in contact with each other in the circumferential direction, wherein the split core parts have a plurality of pole teeth and are split in the circumferential direction, and the number of splits N is greater than or equal to 4, wherein N is an integer. A fastening portion is formed on the outer peripheral side of the core plate, the fastening portion protruding radially outward and having a fastening hole for fastening the core plates to each other in a stacking direction, The number M of the fastening parts in the circumferential direction is formed to be three or more, and has a relationship of N≥M, wherein M is an integer, The divided core part has divided core parts with fastening parts of multiple types. In the divided core parts with fastening parts, the fastening parts are arranged at a plurality of different positions away from the center line connecting the rotation center axis of the rotating electric machine and the circumferential center of the divided core part. In the up and down directions in the stacking direction, the fastening parts of the divided core parts of different types are stacked. In the core plate, the contact parts of the divided core parts are arranged at different positions in the circumferential direction in the up and down directions in the stacking direction. The fastening holes of the fastening parts are formed to communicate in the stacking direction. In addition, the stator disclosed in the present application includes: The stator core part of the rotating electric machine described above; and coils wound around the pole teeth of the stator core part via insulators. In addition, the rotating electric machine disclosed in the present application includes: The stator described above: and A rotor that faces the stator with a gap therebetween and is configured to be rotatable freely. Advantageous Effects of the Invention

[0007] According to the stator core part, stator, and rotating electric machine of the rotating electric machine disclosed in the present application, it is possible to achieve both an improvement in material yield and a design freedom of the fastening part. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a perspective view showing the structure of the stator of the rotating electric machine according to Embodiment 1. Figure 2 It is showing Figure 1 A perspective view of the structure of the stator core part of the rotating electric machine shown. Figure 3 It is showing Figure 2 A top view of the structure of the stator core part shown. Figure 4 It is showing Figure 2 A top view of the structure of the first divided core part of the core plate of the stator core part shown. Figure 5 It is showing Figure 2 A top view of the structure of the second divided core part of the core plate of the stator core part shown. Figure 6 It is showing Figure 2 A top view of the structure of the divided core part without a fastening part of the core plate of the stator core part shown. Figure 7 It is showing Figure 2 A top view of the structure of the first layer core plate of the stator core part shown. Figure 8 It is showingFigure 2 Top view of the structure of the second core plate of the stator core shown. Figure 9 It represents Figure 2 Top view of the structure of a part of the stator core shown. Figure 10 It represents Figure 2 Perspective view of the structure of a part of the stator core shown. Figure 11 It represents Figure 4 Top view of the manufacturing method of the first divided core shown. Figure 12 It represents Figure 5 Top view of the manufacturing method of the second divided core shown. Figure 13 It represents Figure 6 Top view of the manufacturing method of the divided core without fastening part shown. Figure 14 It represents Figure 4 and Figure 5 Top view of the manufacturing methods of the first divided core and the second divided core shown. Figure 15 It represents Figure 4 , Figure 5 and Figure 6 Top view of the manufacturing methods of the first divided core, the second divided core, and the divided core without fastening part shown. Figure 16 Perspective view of the structure of the stator core of the rotating electrical machine according to Embodiment 2. Figure 17 It represents Figure 16 Top view of the structure of the stator core shown. Figure 18 It represents Figure 16 Top view of the structure of the first core plate of the stator core shown. Figure 19 It represents Figure 16 Top view of the structure of the second core plate of the stator core shown. Figure 20 Graph showing the relationship between the number of divisions of the divided core and the material yield rate. Figure 21 Perspective view of the structure of the stator core of the rotating electrical machine according to Embodiment 3. Figure 22 It represents Figure 21 Top view of the structure of the stator core shown. Figure 23 It represents Figure 22 Top view of the structure of the first divided core of the stator core shown. Figure 24 It represents Figure 22 a top view of the structure of the second segmented core of the stator core shown. Figure 25 It represents Figure 22 a top view of the structure of the third segmented core of the stator core shown. Figure 26 It represents Figure 22 a top view of the structure of the segmented core without fastening portion of the stator core shown. Figure 27 It represents Figure 21 a top view of the structure of the first core plate of the stator core shown. Figure 28 It represents Figure 21 a top view of the structure of the second core plate of the stator core shown. Figure 29 It represents Figure 23 a top view of the manufacturing method of the first segmented core shown. Figure 30 It represents Figure 24 a top view of the manufacturing method of the second segmented core shown. Figure 31 It represents Figure 25 a top view of the manufacturing method of the third segmented core shown. Figure 32 It represents Figure 26 a top view of the manufacturing method of the segmented core without fastening portion shown. Figure 33 It represents a top view of the structure of the first core plate of the stator core of the rotating electrical machine according to Embodiment 4. Figure 34 It represents a top view of the structure of the second core plate of the stator core of the rotating electrical machine according to Embodiment 4. Figure 35 It represents a perspective view of the structure of the stator core of the rotating electrical machine according to Embodiment 5. Figure 36 It represents Figure 35 a top view of the structure of the stator core shown. Figure 37 It represents Figure 35 a top view of the structure of the first segmented core of the core plate of the stator core shown. Figure 38 It represents Figure 35 a top view of the structure of the second segmented core of the core plate of the stator core shown. Figure 39 It represents Figure 35 a top view of the structure of the first core plate of the stator core shown. Figure 40 It represents Figure 35 A top view of the structure of the second core plate of the stator core shown. Figure 41 It represents Figure 35 A top view of other structures of the second core plate of the stator core shown. Figure 42 A longitudinal sectional view showing the structure of the rotating electric machine according to the embodiment. Figure 43 A top view showing a comparative example in the manufacturing method of the divided core portion divided into three parts. Detailed implementation manners

[0009] The stator core of the rotating electric machine in each embodiment is configured in a state where the divided core portions of a rotating electric machine such as a motor are arranged in a circular ring shape. Therefore, in the following description, the respective directions in the rotating electric machine are shown as the circumferential direction X, the axial direction Z, and the radial direction Y. In addition, in the stator core and other parts constituting the rotating electric machine, these directions are also the same directions, and each direction is represented and described based on this direction.

[0010] Embodiment 1 Figure 1 A perspective view showing the structure of the stator of the rotating electric machine according to Embodiment 1. Figure 2 It represents Figure 1 A perspective view of the structure of the stator core of the rotating electric machine shown. Figure 3 It represents Figure 2 A top view of the structure of the stator core shown. Figure 4 It represents Figure 2 A top view of the structure of the first divided core portion of the core plate of the stator core shown. Figure 5 It represents Figure 2 A top view of the structure of the second divided core portion of the core plate of the stator core shown. Figure 6 It represents Figure 2 A top view of the structure of the divided core portion without a fastening portion of the core plate of the stator core shown.

[0011] Figure 7 It represents Figure 2 A top view of the structure of the first core plate of the stator core shown. Figure 8 It represents Figure 2 A top view of the structure of the second core plate of the stator core shown. Figure 9 It represents Figure 2 A top view of the structure of a part of the stator core shown. Figure 10 It represents Figure 2 A perspective view of the structure of a part of the stator core shown. Figure 11 It represents Figure 4A plan view of the manufacturing method of the first divided core portion shown. Figure 12 It shows Figure 5 A plan view of the manufacturing method of the second divided core portion shown. Figure 13 It shows Figure 6 A plan view of the manufacturing method of the divided core portion without a fastening portion shown.

[0012] Figure 14 It shows Figure 4 and Figure 5 A plan view of the manufacturing methods of the first divided core portion and the second divided core portion shown. Figure 15 It shows Figure 4 , Figure 5 and Figure 6 A plan view of the manufacturing methods of the first divided core portion, the second divided core portion, and the divided core portion without a fastening portion shown. Figure 42 It is a longitudinal sectional view showing the structure of the rotating electric machine of the embodiment. Figure 43 It is a plan view showing a comparative example in the manufacturing method of the divided core portion having three divisions.

[0013] In the present Embodiment 1, explanations will be made based on each drawing. As Figure 42 shown, the rotating electric machine 90 includes a stator 91 and a rotor 92, and the rotor 92 is formed to face the stator 91 with a gap therebetween and is configured to be rotatable freely. Further, the stator 91 is fixed to the frame 95. The rotor 92 rotates about the rotation center axis Q.

[0014] As Figure 1 shown, the stator 91 of the rotating electric machine 90 includes a stator core portion 80 and a coil 93, and the coil 93 is formed of a conductor made of, for example, a copper wire and is formed in a slot surrounded by pole teeth 9 in the circumferential direction X of the stator core portion 80 via an insulator (insulating paper) 94. Further, an example in which the coil 93 is formed of a flat wire is shown in the drawing, but it is not limited thereto, and a case in which it is formed of a round copper wire or an aluminum wire may also be considered. At one end in the axial direction Z of the coil 93 ( Figure 1 the lower end in Figure 42 ), a terminal portion 931 formed by joining film peeling portions to each other is formed, thereby constituting

[0015] As Figure 2 shown, the stator core portion 80 is formed by laminating a plurality of core plates 8 of thin plates such as electromagnetic steel sheets (plate thickness: 0.25 mm to 0.3 mm or less) in the axial direction Z. Therefore, the axial direction Z corresponds to the lamination direction. Among the core plates 8, particularly, the first layer in the axial direction Z, that is, Figure 2 the lowermost core plate 8 on the paper surface of Figure 2 is set as the first-layer core plate 81, and Figure 2The core plate 8 located directly above the first-layer core plate 81 in the axial direction Z on the paper surface is described as the second-layer core plate 82. However, when representing any core plate, it is illustrated and described as the core plate 8. In addition, the same applies to the following other embodiments.

[0016] As Figure 3 shown, the stator core portion 80 has a plurality of pole teeth 9 formed at equal intervals in the circumferential direction X from the inner peripheral surface of the core plate 8 toward the inside in the radial direction Y, and is divided in the circumferential direction X. The number of divisions N is 4 or more, where N is an integer. Here, the number of divisions N = 6, that is, six divided core portions 10 are arranged in contact with each other in the circumferential direction X. In addition, there are multiple types of divided core portions 10, which will be described later. However, when representing any divided core portion, it is illustrated and described as the divided core portion 10. In addition, the same applies to the following other embodiments.

[0017] As Figure 2 and Figure 3 shown, a fastening portion 5 is formed on the core plate 8 constituting the stator core portion 80. The fastening portion 5 protrudes outward in the radial direction Y from the outer peripheral surface 800 and has a fastening hole 51 for fastening the core plates 8 to each other in the axial direction Z. The number M of the fastening portions 5 on the core plate 8 in the circumferential direction X is three or more, where M is an integer. In this example, the number M of the fastening portions 5 on the core plate 8 is 3. Thus, there is a relationship of N≥M, and there is also a relationship of N>M.

[0018] The fastening hole 51 of the fastening portion 5 is used as a through hole for fastening the stator core portion 80 to Figure 35 shown in the frame 95. In addition, it can also be considered that a wall thickness portion or the like for ensuring the rigidity of the fastening portion 5 is formed around the fastening hole 51 of the fastening portion 5. In addition, the fastening portion 5 and the fastening hole 51 are also illustrated and described in the same manner in the stator core portion 80, the core plate 8, and the corresponding divided core portion 10 shown below.

[0019] As Figure 3 shown, the number of divisions N = 6, and the divided core portion 10 is evenly divided in the circumferential direction. Therefore, the angle θ1 of one divided core portion 10 is 60 degrees (refer to Figure 4 the angle θ1). In addition, the fastening portions 5 are arranged at intervals of 360 degrees / M = 120 degrees (refer to Figure 7 the angle θ4).

[0020] In addition, in the present Embodiment 1, the divided core portion 10 is composed of three types of divided core portions 10. As the three types of divided core portions 10, there are: a first divided core portion 1 and a second divided core portion 2 as divided core portions with multiple belt fastening portions, wherein the fastening portions 5 are arranged at a plurality of different positions away from the center line Q1 connecting the rotation center axis Q of the rotating electric machine 90 and the center of the circumferential direction X of the divided core portion 10; and a divided core portion 3 without a fastening portion where the fastening portion 5 is not formed.

[0021] Hereinafter, the three types of divided core portions 10 will be described separately. As Figure 4 shown, in the first divided core portion 1, the fastening portion 5 is formed at a position away from the center line Q1 connecting the rotation center axis Q and the center of the circumferential direction X of the divided core portion 10. Here, it is formed at a portion with an angle θ21 to the left on the paper surface. Specifically, it is formed with an angle θ21 = 15 degrees. The length D1 from the rotation center axis Q to the outer peripheral surface 100 of the first divided core portion 1 is equivalent to the radius of the core plate 8. In addition, the fastening portion 5 is formed to protrude by a length D2 more outward in the radial direction Y from the outer peripheral surface 100 than this length D1. In addition, the relationship between the length D1 and the length D2 is the same in the following cases, so the description thereof will be appropriately omitted.

[0022] In addition, on the outer peripheral surface 100 of the first divided core portion 1, outer peripheral concave portions 72 are respectively formed at both ends of the center line Q1 and the circumferential direction X. The outer peripheral concave portion 72 is used for positioning or welding of the core plates 8 in the axial direction Z. In addition, a convex portion 111 is formed on one abutting portion 101 that abuts on other divided core portions 10 in the circumferential direction X of the first divided core portion 1, and a concave portion 112 is formed on the other abutting portion 102. The convex portion 111 and the concave portion 112 are used for positioning in the radial direction Y of various divided core portions 10 and determination of forward and reverse, etc.

[0023] Next, as Figure 5 shown, in the second divided core portion 2, the fastening portion 5 is formed at a position away from the center line Q1 connecting the rotation center axis Q and the center of the circumferential direction X of the divided core portion 10. Here, it is formed at a portion with an angle θ22 to the right on the paper surface. Specifically, it is formed with an angle θ22 = 15 degrees. Thus, the fastening portion 5 of the first divided core portion 1 and the fastening portion 5 of the second divided core portion 2 are formed at positions symmetric with respect to the center line Q1.

[0024] In addition, outer peripheral concave portions 72 are formed on the center line Q1 of the outer peripheral surface 200 of the second divided core portion 2 and at both ends in the circumferential direction X. The outer peripheral concave portions 72 are used for positioning or welding of the core plates 8 to each other in the axial direction Z. In addition, a convex portion 211 is formed on one abutting portion 201 that abuts on other divided core portions 10 in the circumferential direction X of the second divided core portion 2, and a concave portion 212 is formed on the other abutting portion 202. The convex portion 211 and the concave portion 212 are used for positioning of various divided core portions 10 to each other in the radial direction Y and determination of front and back, etc.

[0025] Next, as Figure 6 shown, no fastening portion 5 is formed in the divided core portion 3 without a fastening portion. In addition, outer peripheral concave portions 72 are formed on the center line Q1 of the outer peripheral surface 300 of the divided core portion 3 without a fastening portion and at both ends in the circumferential direction X. The outer peripheral concave portions 72 are used for positioning or welding of the core plates 8 to each other in the axial direction Z. In addition, a convex portion 311 is formed on one abutting portion 301 that abuts on other divided core portions 10 in the circumferential direction X of the divided core portion 3 without a fastening portion, and a concave portion 312 is formed on the other abutting portion 302. The convex portion 311 and the concave portion 312 are used for positioning of various divided core portions 10 to each other in the radial direction Y and determination of front and back, etc.

[0026] In addition, as Figure 7 shown, the first layer core plate 81 of the stator core portion 80 is formed by alternately arranging the second divided core portion 2 and the divided core portion 3 without a fastening portion in the circumferential direction X. In addition, as Figure 8 shown, the second layer core plate 82 of the stator core portion 80 is formed by alternately arranging the first divided core portion 1 and the divided core portion 3 without a fastening portion in the circumferential direction X. In addition, in the stator core portion 80, in the axial direction Z, the first layer core plate 81 and the second layer core plate 82 are sequentially stacked.

[0027] In addition, if the core plates 8 provided with the first divided core portion 1, the second divided core portion 2, and the divided core portion 3 without a fastening portion are sequentially stacked in the axial direction Z as shown by the first layer core plate 81 and the second layer core plate 82, the fastening portions 5 of different types of divided core portions 10 such as the fastening portion 5 of the first divided core portion 1 and the fastening portion 5 of the second divided core portion 2 are stacked on top of and below each other in the axial direction Z.

[0028] Thus, above and below in the axial direction Z, as Figure 3 and Figure 9 shown, on the upper side in the axial direction Z, six abutting portions L1 in the circumferential direction X of the divided core portions 10 are formed, and on the lower side in the axial direction Z, six abutting portions L2 are formed at the overlapping positions shown by the dotted lines offset in the circumferential direction X from the just-mentioned abutting portions L1. Thus, the relationship between the abutting portion L1 and the abutting portion L2 becomes a structure that overlaps at an angle θ3 = 30 degrees, which is half of the angle θ1 of the divided core portion 10, in the axial direction Z (stacking direction).

[0029] Thus, when laminating the core plates 8, after the third layer, the first core plate 81 and the second core plate 82 may be laminated in sequence. Thus, similar to the lamination relationship between the first core plate 81 and the second core plate 82 shown previously, the fastening portion 5 and the fastening holes 51 are arranged to coincide with each other in the axial direction Z, so that an installation portion capable of being fastened to the frame 95 can be formed. In addition, in the stator core portion 80, the abutting portions L1 and L2 that are different from each other in the axial direction Z are formed in a lapped structure (brick-laying stacked state), so that the rigidity of the stator core portion 80 can be ensured.

[0030] In addition, outer peripheral concave portions 72 are respectively formed on the center line Q1 and at both ends in the circumferential direction X of the first divided core portion 1, the second divided core portion 2, and the divided core portion 3 without a fastening portion. Therefore, as Figure 2 and Figure 10 shown, the stator core portion 80 has a groove portion 720 formed on the outer peripheral surface 800 through the outer peripheral concave portions 72 and communicating with each other in the axial direction Z.

[0031] At this time, the core plates 8 are fixed to each other in the axial direction Z (lamination direction) by riveting, welding, bonding, etc. In addition, when bonding is used, it is easy to obtain the rigidity required for the stator 91, so the welding described later may not be performed. In addition, in cases other than bonding, welding is performed in the groove portion 720 in the axial direction Z shown previously. By using such a groove portion 720, the weld bead bulge can be suppressed during welding in the axial direction Z. In addition, the groove portion 720 can also be used for positioning the divided core portion 10. In addition, general methods such as laser welding are used in welding. In addition, the structures of the outer peripheral concave portion 72 and the groove portion 720 are also the same in the following embodiments, so the description thereof is appropriately omitted.

[0032] Next, regarding the manufacturing methods of the first divided core portion 1, the second divided core portion 2, and the divided core portion 3 without a fastening portion, Figures 11 to 15 their relationship with the material yield rate will be described. In each figure, pilot holes P are provided in a thin plate 600 such as an electromagnetic steel sheet (plate thickness of 0.25 mm to 0.3 mm or less) used for manufacturing the divided core portion 10. The pilot holes P are used for positioning during the division of the core portion 10 and blanking, so as to minimize the area not used as a product. In addition, the feeding direction of the thin plate 600 is shown by an arrow T. Generally, the more the number of divisions, the more the area not used as a product (invalid area) can be reduced. In addition, when the number of divisions = 6, the individual divided core portions 10 can be reduced, so that a plurality of them can be arranged differently on the steel plate, thereby further improving the material yield rate.

[0033] Figure 11 The die arrangement position of the first divided core portion 1 is shown. The material width is W1, and the feeding pitch is H1.Figure 12 The die configuration position of the second divided core 2 is shown. The material width is W2, and the feed pitch is H2. When manufacturing these first divided cores 1 and second divided cores 2 in this way, the material yield is approximately 60%. In addition, Figure 13 The die configuration structure of the divided core 3 without a fastening portion is shown. The material width is W3, and the feed pitch is H3. When manufacturing the divided core 3 without a fastening portion in this way, the material yield is approximately 73%.

[0034] In this way, the material yield of the divided core 3 without a fastening portion without the fastening portion 5 is superior to that of the first divided core 1 and the second divided core 2. Therefore, even in the case including the first divided core 1 and the second divided core 2 having the fastening portion 5, the material yield of the entire stator core 80 can be improved. In addition, Figure 43 In the case of the comparative example where the number of divisions N = 3 shown, the material yield is approximately 58.3%. In contrast, in the case of the divided core 10 in the present embodiment, since the arc shape is smaller, the material yield can be increased, and the material can be effectively and flexibly used.

[0035] In addition, as Figures 11 to 13 shown, the pilot hole P is arranged in the invalid area of the product that is not used as the divided core 10, and the divided core 10 can be arranged in the state with the optimal material yield, so that the miniaturization of the die, the high speed of stamping blanking, obtaining a plurality of divided cores 10 can be achieved, and the productivity can be improved. In addition, Figures 11 to 13 The configuration diagram of [] is only an example, and other examples within the range where the material yield does not decrease are also possible.

[0036] Based on Figure 14 and Figure 15 , examples of other manufacturing methods will be described. As Figure 14 shown, relative to the arrow T in the feed direction, the first divided core 1 and the second divided core 2 are alternately arranged and manufactured so that the fastening portion 5 does not overlap at the same position in the width direction of the thin plate 600. In this case, the material yield is approximately 59%. In addition, as Figure 15 shown, it is also possible to consider adding the divided core 3 without a fastening portion to the first divided core 1 and the second divided core 2 and arranging them in sequence relative to the arrow T for manufacturing.

[0037] For example, in the case of separately arranging dies for the first divided core and the second divided core, two dies are required. In this case, each die requires one stamping machine, resulting in an increase in equipment cost and processing cost. In contrast, in the case of as Figure 14 and Figure 15When manufactured as described above, within the range where the material yield rate is not reduced, the first divided core portion 1 and the second divided core portion 2 having different shapes can be blanked by one die, or the first divided core portion 1, the second divided core portion 2, and the divided core portion 3 without a fastening portion ( Figure 15 the portion F surrounded by the dashed line in Figure 15 is the portion blanked by one die) can be blanked, that is, divided core portions having different shapes can be arranged in the same die for blanking, and the pilot holes P can be arranged.

[0038] In addition, within the range where the die size is not increased, a large stamping machine can be not used. In addition, a small stamping machine can be used, whereby the stamping speed can be increased. Thus, core portions of multiple types can be concentrated in one die, thereby achieving both the material yield rate and high-speed stamping, and improving productivity.

[0039] In addition, the core plate 8 is formed by arranging the fastening portions 5 of the first divided core portion 1 and the second divided core portion 2 at a plurality of different positions away from the center line Q1 connecting the rotation center axis Q and the circumferential center of the divided core portion 10. Therefore, by appropriately setting the formation positions of the fastening portions 5 of the first divided core portion 1 and the fastening portions 5 of the second divided core portion 2, the position of the fastening portion 5 in the core plate 8 can be appropriately set, and thus the degree of freedom of the setting portion of the fastening portion 5 is increased.

[0040] According to the stator core of the rotating electric machine of the first embodiment configured as above, the stator core is formed by axially laminating a plurality of core plates, the core plates are formed by arranging divided core portions in contact with each other in the circumferential direction. The divided core portions have a plurality of pole teeth and are circumferentially divided, and the number of divisions N is 4 or more, where N is an integer, a fastening portion is formed on the outer peripheral side of the core plate. The fastening portion protrudes radially outward and has a fastening hole for fastening the core plates to each other in the stacking direction, the number M of the fastening portions in the circumferential direction is formed to be three or more, where M is an integer, and has a relationship of N≥M, the divided core portions include a plurality of types of divided core portions with fastening portions. In the divided core portions with fastening portions, the fastening portions are arranged at a plurality of different positions away from the center line connecting the rotation center axis of the rotating electric machine and the circumferential center of the divided core portion, the fastening portions of different types of the divided core portions with fastening portions are stacked on top of each other in the stacking direction, in the core plate, the contact portions of the divided core portions are arranged at different positions in the circumferential direction in the stacking direction, the fastening holes of the fastening portions are formed to communicate with each other in the stacking direction, In addition, the stator according to Embodiment 1 configured as described above includes: the stator core of the rotating electrical machine described above; and coils wound around the pole teeth of the stator core via insulators, and has a relationship where N is greater than M, the divided core has a divided core portion without a fastening portion where the fastening portion is not formed, In addition, the rotating electrical machine according to Embodiment 1 configured as described above includes: the stator described above: and a rotor that faces the stator across a gap and is configured to be rotatable freely, Therefore, there are multiple types of divided core portions with fastening portions, and in the divided core portions with fastening portions, the fastening portions are arranged at a plurality of different positions away from the center line connecting the rotation center axis of the rotating electrical machine and the circumferential center of the divided core portion. Thereby, it is possible to achieve both an increase in material yield and a degree of freedom in the design of the fastening portion. In addition, the abutting portions of the divided core portions in the core plate are arranged at different positions in the circumferential direction in the stacking direction and are formed in an overlapping structure. Therefore, even if it is formed by the divided core portions, the rigidity of the stator core and the fixing strength of the stator core can be ensured. In addition, since the core plate is composed of a plurality of divided core portions, it is possible to use electromagnetic steel sheets different from those of the rotor (different in material, plate thickness, etc.). Thus, it is possible to achieve both the selection of materials suitable for performance, the selection of steel sheets, and an increase in material yield. In addition, in the past, it was not possible to increase the number of divisions of the core plate, and the die size was large. In addition, along with this, the stamping machine for placing the die was large, and the stamping speed was also limited. In contrast, according to Embodiment 1, it is possible to increase the number of divisions of the core plate and reduce the die size. Therefore, the processing speed can be increased, and the stamping machine can be miniaturized and speeded up, and productivity can be improved due to the miniaturization of the die.

[0041] In addition, for the stator core of the rotating electrical machine according to Embodiment 1 configured as described above, when there are at least two types as the divided core portions with fastening portions, and one of them is regarded as the first divided core portion and the other as the second divided core portion, the fastening portion of the first divided core portion and the fastening portion of the second divided core portion are formed at positions line-symmetric with respect to the center line. Therefore, it is possible to easily achieve both an increase in material yield and a degree of freedom in the design of the fastening portion.

[0042] In addition, for the stator core of the rotating electrical machine according to Embodiment 1 configured as described above, The number of divisions N of the core plate is formed as N = 6, The number M of the fastening portions is formed as M = 3 or M = 4, The fastening portions are arranged at intervals of (360 degrees / M) in the circumferential direction, Therefore, it is possible to easily and reliably achieve both an improvement in material yield and a degree of freedom in the design of the fastening portions.

[0043] In addition, according to the stator core of the rotating electric machine of Embodiment 1 configured as described above, The divided cores are bonded and fixed to each other in the stacking direction, Therefore, it is possible to firmly fix the core plate in the stacking direction and improve the rigidity of the stator core. In addition, since the fixing is performed by bonding, it is possible to equalize the plate thickness deviation of the core plate, thereby stabilizing the thickness in the stacking direction of the stator core. In addition, there is a possibility of omitting the fixing by welding.

[0044] In addition, according to the stator core of the rotating electric machine of Embodiment 1 configured as described above, The core plate is formed at a position where the outer peripheral concave portions are connected in the stacking direction on the outer peripheral surface, Therefore, it is possible to easily arrange multiple types of divided cores and improve the assemblability.

[0045] In addition, according to the stator core of the rotating electric machine of Embodiment 1 configured as described above, A welding portion for fixing the divided core along the stacking direction is provided in a groove portion formed by the outer peripheral concave portions connected in the stacking direction, Therefore, conventionally, due to the presence of the fastening portions, it has been impossible to provide a groove for suppressing the bead bulge during welding in the interlayer fixing at the abutting portion, However, since it is possible to form a welding portion in this groove portion, it is possible to suppress the bead bulge during welding.

[0046] In addition, according to the stator core of the rotating electric machine of Embodiment 1 configured as described above, The divided cores of the core plate are formed by being evenly divided in the circumferential direction, Therefore, it is possible to reliably achieve both an improvement in material yield and a degree of freedom in the design of the fastening portions.

[0047] Embodiment 2 In the above-described Embodiment 1, an example in which the number of divisions N = 6 and the number of fastening portions 5, M = 3, is shown, but it is not limited thereto. In the present Embodiment 2, the case where the number of divisions N = 6 and the number of fastening portions 5, M = 4, will be described. In addition, the same reference numerals are assigned to the same parts as those in the above-described Embodiment 1, and the description thereof will be appropriately omitted. Here, the description will be centered on the parts different from those in the above-described Embodiment 1.

[0048] Figure 16 FIG. 4 is a perspective view showing the structure of the stator core of the rotating electric machine according to Embodiment 2. Figure 17 FIG. Figure 16 5 is a plan view showing the structure of the stator core shown in FIG. 4. Figure 18 FIG. Figure 16 6 is a plan view showing the structure of the first core plate of the stator core shown in FIG. 4. Figure 19 FIG. Figure 16 7 is a plan view showing the structure of the second core plate of the stator core shown in FIG. 4. Figure 20 FIG. 8 is a graph showing the relationship between the number of divisions of the divided core and the material yield rate.

[0049] In the present Embodiment 2, the description will be made based on each drawing. As shown in FIG. 9, the stator core 80 is provided with fastening portions 5 in the circumferential direction X, and the number of fastening portions 5, M = 4. Therefore, the fastening portions 5 are arranged at intervals of 360 degrees / M = 90 degrees (see the angle θ5 in FIG. 10). As shown in FIG. 11, the core plates 8 of the stator core 80 are formed in a ring shape by a plurality of divided cores 10 having a number of divisions N = 6, similarly to the above-described Embodiment 1. In addition, in the present Embodiment 2, the divided core 10 is composed of the same three types of divided cores 10 as those in the above-described Embodiment 1, that is, the first divided core 1, the second divided core 2, and the divided core 3 without a fastening portion. Figure 16 Figure 17 Figure 17

[0050] Specifically, as shown in FIG. 12, in the first core plate 81, the first divided core 1, the second divided core 2, the divided core 3 without a fastening portion, the first divided core 1, the second divided core 2, and the divided core 3 without a fastening portion are arranged in contact with each other in the circumferential direction X in sequence. In addition, as shown in FIG. 13, in the second core plate 82, the first divided core 1, the second divided core 2, the divided core 3 without a fastening portion, the first divided core 1, the second divided core 2, and the divided core 3 without a fastening portion are arranged in contact with each other in the circumferential direction X in sequence. Figure 18 Figure 19

[0051] ​​​​​In addition, in the stator core 80, in the axial direction Z, the first core plate 81 and the second core plate 82 are stacked in sequence. In this way, if the core plates 8 provided with the first divided core portion 1, the second divided core portion 2, and the divided core portion 3 without the fastening portion are stacked in sequence in the axial direction Z as shown previously for the first core plate 81 and the second core plate 82, the fastening portions 5 of different types of divided core portions 10 such as the fastening portion 5 of the first divided core portion 1 and the fastening portion 5 of the second divided core portion 2 are stacked one above the other in the axial direction Z.

[0052] Accordingly, above and below in the axial direction Z, as Figure 17 shown, similar to the first embodiment above, on the upper side in the axial direction Z, six abutting portions L1 in the circumferential direction X between the divided core portions 10 are formed. On the lower side in the axial direction Z, six abutting portions L2 are formed at the overlapping positions shown by the dotted lines after being offset in the circumferential direction X from the just-mentioned abutting portion L1. Therefore, the relationship between the abutting portion L1 and the abutting portion L2 becomes a structure that overlaps in the axial direction Z (the stacking direction) at an angle θ3 = 30 degrees, which is half of the angle θ1 of the divided core portion 10 (refer to Figure 9 ).

[0053] Therefore, when stacking the core plates 8, as long as the first core plate 81 and the second core plate 82 are stacked in sequence after the third layer, thus, similar to the stacking relationship of the first core plate 81 and the second core plate 82 shown previously, the fastening portions 5 and the fastening holes 51 are arranged to coincide with each other in the axial direction Z, so that an installation portion that can be fastened to the frame 95 can be formed. In addition, in the stator core 80, the non-identical abutting portions L1 and abutting portions L2 in the axial direction Z are formed in an overlapping structure (brickwork stacking state), so that the rigidity of the stator core 80 can be ensured.

[0054] Here, the relationship between the number of divisions N of the divided core portion 10 and the total material yield is shown in the Figure 20 chart. As shown in the figure, when the number of divisions N = 6, the material yield increases. In the case of increasing to the number of divisions N = 6 like this, by setting the shape of the fastening portion 5 as shown in the first embodiment and the second embodiment above and arranging the respective divided core portions 1, 2, and 3, the material yield can be increased. As a result, even when the number of divisions is the same and the number of fastening portions 5 is different, a stator core 80 that can improve the material yield can be constituted.

[0055] Therefore, a stator core 80 having the fastening portion 5 can be constituted without reducing the material yield. In addition, since the divided core portions 10 can be arranged in an overlapping state in the axial direction Z, a stator core 80 having the fastening portion 5 can be constituted without reducing the rigidity of the stator core 80.

[0056] The stator core, stator, and rotating electrical machine of Embodiment 2 configured as described above exhibit the same effects as those of the above-described Embodiment 1. Moreover, even when using the same number of types of segmented cores, the fastening portion can be freely configured and designed. Therefore, even with the same mold, the configuration and number of the fastening portions can be changed by combination alone to correspond. Since no other mold is required, the change of the fastening portion can be achieved without reducing the material yield.

[0057] Embodiment 3 In this Embodiment 3, an example in which the number of segments N is different from those of the above-described embodiments will be described. Specifically, the case where the number of segments N = 4 and the number M of the fastening portions 5 = 3 is considered. In addition, the same reference numerals are given to the same parts as those of the above-described embodiments, and the description thereof is appropriately omitted. Here, the description will be centered on the parts different from those of the above-described embodiments.

[0058] Figure 21 FIG. is a perspective view showing the structure of the stator core of the rotating electrical machine of Embodiment 3. Figure 22 is showing Figure 21 a top view of the structure of the stator core shown. Figure 23 is showing Figure 22 a top view of the structure of the first segmented core of the stator core shown. Figure 24 is showing Figure 22 a top view of the structure of the second segmented core of the stator core shown. Figure 25 is showing Figure 22 a top view of the structure of the third segmented core of the stator core shown. Figure 26 is showing Figure 22 a top view of the structure of the segmented core without the fastening portion of the stator core shown.

[0059] Figure 27 is showing Figure 21 a top view of the structure of the first layer core plate of the stator core shown. Figure 28 is showing Figure 21 a top view of the structure of the second layer core plate of the stator core shown. Figure 29 is showing Figure 23 a top view of the manufacturing method of the first segmented core shown. Figure 30 is showing Figure 24 a top view of the manufacturing method of the second segmented core shown. Figure 31 is showing Figure 25 a top view of the manufacturing method of the third segmented core shown. Figure 32 is showing Figure 26 a top view of the manufacturing method of the segmented core without the fastening portion shown.

[0060] In Embodiment 3, the description will be made based on each figure. As Figure 21 and Figure 22 shown, similarly to the above-described embodiments, a fastening portion 5 is formed in the core plate 8 constituting the stator core portion 80. The fastening portion 5 protrudes outward in the radial direction Y on the outer peripheral surface 800 and has a fastening hole 51 for fastening the core plates 8 to each other in the axial direction Z. In Embodiment 3, the core plate 8 has a number M of fastening portions 5 that is three or more in the circumferential direction X, where M is an integer, and here M = 3. Therefore, there is a relationship of N≥M, and there is also a relationship of N>M.

[0061] As Figure 22 shown, the number of divisions N = 4, and the divided core portion 10 is evenly divided. Therefore, the angle θ11 of one divided core portion 10 = 90 degrees (refer to Figure 23 the angle θ11). In addition, the fastening portions 5 are arranged at intervals of 360 degrees / M = 120 degrees.

[0062] In addition, in Embodiment 3, as the divided core portion 10, it is composed of four types of divided core portions 10. As the four types of divided core portions 10, there are: a first divided core portion 11, a second divided core portion 21, and a third divided core portion 4 as various divided core portions with fastening portions, where the fastening portion 5 is arranged at a plurality of different positions away from the center line Q1 connecting the rotation center axis Q of the rotating electric machine 90 and the center of the circumferential direction X of the divided core portion 10; and a divided core portion 31 without a fastening portion where the fastening portion 5 is not formed.

[0063] Hereinafter, the four types of divided core portions 10 will be described separately. As Figure 23 shown, in the first divided core portion 11, the fastening portion 5 is formed at a position away from the center line Q1 connecting the rotation center axis Q and the center of the circumferential direction X of the divided core portion 10. Here, it is formed at a portion at an angle θ21 to the left on the paper surface. Specifically, it is formed as an angle θ23 = 5 degrees.

[0064] In addition, outer peripheral concave portions 72 are respectively formed at both ends in the circumferential direction X of the outer peripheral surface 100 of the first divided core portion 11 and other specified portions. The outer peripheral concave portions 72 are used for positioning or welding the core plates 8 to each other in the axial direction Z.

[0065] Next, as Figure 24 shown, in the second divided core portion 21, the fastening portion 5 is formed at a position away from the center line Q1 connecting the rotation center axis Q and the center of the circumferential direction X of the divided core portion 10. Here, it is formed at a portion at an angle θ24 to the right on the paper surface. Specifically, it is formed as an angle θ24 = 25 degrees.

[0066] In addition, outer peripheral recesses 72 are respectively formed at both ends in the circumferential direction X of the outer peripheral surface 200 of the second divided core portion 21 and at other specified portions. The outer peripheral recesses 72 are used for positioning or welding of the core plates 8 to each other in the axial direction Z.

[0067] Next, as Figure 25 shown, in the third divided core portion 4, the fastening portion 5 is formed at a position away from the center line Q1 connecting the rotation center axis Q and the center in the circumferential direction X of the divided core portion 10. Here, it is formed at a portion with an angle θ25 different from the angle θ23 of the first divided core portion 11 and on the left side in the drawing plane. Specifically, the angle θ25 is formed to be 35 degrees.

[0068] In addition, outer peripheral recesses 72 are respectively formed at both ends in the circumferential direction X of the outer peripheral surface 400 of the third divided core portion 4 and at other specified portions. The outer peripheral recesses 72 are used for positioning or welding of the core plates 8 to each other in the axial direction Z. Further, a convex portion 411 is formed at one abutting portion 401 that abuts against the other divided core portions 10 in the circumferential direction X of the third divided core portion 4, and a concave portion 412 is formed at the other abutting portion 402. The convex portion 411 and the concave portion 412 are used for positioning in the radial direction Y of various divided core portions 10 to each other and for determining forward and reverse, etc.

[0069] Next, as Figure 26 shown, the fastening portion 5 is not formed in the divided core portion 31 without a fastening portion. In addition, outer peripheral recesses 72 are respectively formed at both ends in the circumferential direction X of the outer peripheral surface 300 of the divided core portion 31 without a fastening portion and at other specified portions.

[0070] In addition, as Figure 27 shown, the first layer core plate 81 of the stator core portion 80 is formed by sequentially arranging the first divided core portion 11, the second divided core portion 21, the divided core portion 31 without a fastening portion, and the third divided core portion 4 in the circumferential direction X. In addition, as Figure 28 shown, the second layer core plate 82 of the stator core portion 80 is formed by sequentially arranging the first divided core portion 11, the second divided core portion 21, the divided core portion 31 without a fastening portion, and the third divided core portion 4 in the circumferential direction X. Here, the arrangement positions of the respective divided core portions 11, 21, 31, 4 in the circumferential direction X of the first layer core plate 81 and the second layer core plate 82 are different. In addition, in the stator core portion 80, in the axial direction Z, the first layer core plate 81 and the second layer core plate 82 are sequentially laminated to form.

[0071] In addition, as shown in the first core plate 81 and the second core plate 82, as long as the core plates 8 configured with the first divided core portion 11, the second divided core portion 21, the third divided core portion 4, and the divided core portion 31 without the fastening portion are stacked in the axial direction Z in sequence, the fastening portions 5 of different types of divided core portions 10, that is, the fastening portion 5 of the first divided core portion 11 and the fastening portion 5 of the third divided core portion 4, or the fastening portion 5 of the second divided core portion 21 and the fastening portion 5 of the first divided core portion 11, or the fastening portion 5 of the third divided core portion 4 and the fastening portion 5 of the second divided core portion 21 are stacked in the axial direction Z.

[0072] Thus, above and below in the axial direction Z, as Figure 22 shown, on the upper side in the axial direction Z, four abutting portions L1 in the circumferential direction X between the divided core portions 10 are formed. On the lower side in the axial direction Z, four abutting portions L2 are formed at the overlapping positions shown by the dotted lines offset in the circumferential direction X from the just-mentioned abutting portions L1.

[0073] Therefore, when laminating the core plates 8, after the third layer, it is only necessary to stack the first core plate 81 and the second core plate 82 in sequence. Thus, similar to the lamination relationship of the first core plate 81 and the second core plate 82 shown previously, the fastening portions 5 and the fastening holes 51 are arranged to coincide with each other in the axial direction Z, so that an installation portion that can be fastened to the frame 95 can be formed. In addition, in the stator core portion 80, the non-identical abutting portions L1 and the abutting portions L2 in the axial direction Z are formed in a lapped structure (brickwork stacking state), so that the rigidity of the stator core portion 80 can be ensured and the material yield can be improved.

[0074] Next, regarding the manufacturing methods of the first divided core portion 11, the second divided core portion 21, the third divided core portion 4, and the divided core portion 31 without the fastening portion respectively, use Figures 29 to 32 , to illustrate their relationship with the material yield. In each figure, pilot holes P are provided in the thin plate 600 such as an electromagnetic steel sheet (plate thickness is 0.25 mm to 0.3 mm or less) used for manufacturing the divided core portion 10. The pilot holes P are used for positioning during the division of the core portion 10 and blanking, so as to minimize the area not used as a product. Generally speaking, the more the number of divisions, the more the area not used as a product (invalid area) can be reduced. In addition, when the number of divisions = 6, a single divided core portion 10 can be reduced. Therefore, a plurality of divided core portions 10 can be arranged differently on the steel plate, so that the material yield can be further improved. In addition, the feeding direction of the thin plate is shown by the arrow T.

[0075] Figure 29 Shows the die arrangement position of the first divided core portion 11. Figure 30 Shows the die arrangement position of the second divided core portion 21. Figure 31Shows the die configuration position of the third divided core portion 4. When manufacturing the first divided core portion 11 and the second divided core portion 21 in this way, the material yield is approximately 52.8%. In addition, when manufacturing the third divided core portion 4 in this way, the material yield is approximately 56%. In addition, Figure 32 Shows the die configuration structure of the divided core portion 31 without a fastening portion. When manufacturing the divided core portion 31 without a fastening portion in this way, the material yield is approximately 63.5%.

[0076] In this way, the material yield of the divided core portion 31 without a fastening portion without the fastening portion 5 is superior to the material yields of the first divided core portion 11, the second divided core portion 21, and the third divided core portion 4. Therefore, even when forming the first divided core portion 11, the second divided core portion 21, and the third divided core portion 4 having the fastening portion 5, the material yield of the entire stator core portion 80 can be improved.

[0077] According to the stator core portion, stator, and rotating electrical machine of Embodiment 3 configured as described above, exhibit the same effects as the above-described respective embodiments, and there are three or more types of the divided core portion with a fastening portion, therefore, both the improvement in material yield and the design freedom of the fastening portion are further improved.

[0078] Embodiment 4 Figure 33 Is a top view showing the structure of the first layer core plate of the stator core portion of the rotating electrical machine of Embodiment 4. Figure 34 Is a top view showing the structure of the second layer core plate of the stator core portion of the rotating electrical machine of Embodiment 4. In addition, the same reference numerals are assigned to the same parts as those in the above-described respective embodiments, and the description thereof is appropriately omitted. Here, the description will be centered on the parts different from the above-described respective embodiments.

[0079] In this Embodiment 4, a case where the first layer core plate 81 and the second layer core plate 82 of the divided core portion 10 are turned over front and back will be described. As Figure 33 shown, the first layer core plate 81 is configured to be alternately arranged with the second divided core portion 2 and the divided core portion 3 without a fastening portion in the circumferential direction X in the same manner as in the above-described Embodiment 1. In addition, as Figure 34 shown, the second layer core plate 82 is configured such that the anti-second divided core portion 220 after the second divided core portion 2 is turned over front and back and the anti-divided core portion 330 without a fastening portion after the divided core portion 3 without a fastening portion is turned over front and back are alternately arranged in the circumferential direction X.

[0080] If the first core plate 81 and the second core plate 82 are formed and stacked in sequence along the axial direction Z, the stator core 80 is configured in a lapped arrangement of the abutting portion L1 and the abutting portion L2, and thus can be formed in the same manner as in the above-described respective embodiments.

[0081] In addition, two types of split cores with fastening portions, namely the second split core 2 and the anti-second split core 220, can be formed by the same die, and the split cores 3 without fastening portions and the anti-split cores 330 without fastening portions can be formed by the same die. Therefore, here, four types of split cores 10 can be manufactured with two types of dies, thereby reducing the types of dies and lowering the cost. In addition, since the split cores 10 are used by being turned over front and back, the thickness deviation of the electromagnetic steel sheets can be reduced. In addition, the blanking burrs generated during blanking are not aligned with the lamination direction, so short circuits in the lamination direction can be suppressed, and thus eddy current losses can be reduced.

[0082] According to the stator core, stator, and rotating electrical machine of Embodiment 4 configured as described above, exhibit the same effects as the above-described respective embodiments, the core plates are configured such that the split cores are arranged in multiple types by being turned over front and back, Therefore, the blanking collapse surfaces of the split cores face each other, whereby short-circuit paths in the lamination direction can be blocked and iron loss can be reduced. In addition, the thickness deviation of the core plates can be reduced.

[0083] Embodiment 5 In the above-described respective embodiments, an example including split cores without fastening portions in the case where the relationship between the number of splits N and the number of fastening portions M is N > M is shown. However, in the present embodiment, the case where the relationship between the number of splits N and the number of fastening portions M is N = M and split cores without fastening portions are not included will be described. In addition, the same reference numerals are assigned to the same parts as in the above-described respective embodiments, and the description thereof will be appropriately omitted. Here, the description will be centered on the parts different from the above-described respective embodiments.

[0084] Figure 35 is a perspective view showing the structure of the stator core of the rotating electrical machine of Embodiment 5. Figure 36 is showing Figure 35 a top view of the structure of the stator core shown. Figure 37 is showing Figure 35 a top view of the structure of the first split core of the core plate of the stator core shown. Figure 38 is showing Figure 35 a top view of the structure of the second split core of the core plate of the stator core shown. Figure 39 is showing Figure 35 a top view of the structure of the first-layer core plate of the stator core shown. Figure 40It represents Figure 35 A top view of the structure of the second core plate of the stator core shown.

[0085] In Embodiment 3, it will be described based on each figure. As Figure 35 and Figure 36 shown, similarly to the above-described embodiments, a fastening portion 5 is formed on the core plate 8 constituting the stator core 80. The fastening portion 5 protrudes outward in the radial direction Y on the outer peripheral surface 800 and has a fastening hole 51 for fastening the core plates 8 to each other in the axial direction Z. In Embodiment 5, the core plate 8 has a number M of fastening portions 5 that is three or more in the circumferential direction X, where M is an integer, and here M = 4. In addition, the number of divisions N of the core plate 8 = 4. Therefore, there is a relationship of N = M.

[0086] As Figure 36 shown, the number of divisions N = 4, and the divided core portion 10 is evenly divided. Therefore, the angle θ11 of one divided core portion 10 = 90 degrees (refer to Figure 37 the angle θ11). In addition, the fastening portions 5 are arranged at intervals of 360 degrees / M = 90 degrees (refer to Figure 39 the angle θ5).

[0087] In addition, in Embodiment 5, as the divided core portion 10, it is composed of two types of divided core portions 10. As the two types of divided core portions 10, there are a first divided core portion 12 and a second divided core portion 22 that are divided core portions with fastening portions of multiple types. Among them, the fastening portions 5 are arranged at a plurality of different positions away from the center line Q1 connecting the rotation center axis Q of the rotating electrical machine 90 and the center of the circumferential direction X of the divided core portion 10.

[0088] Hereinafter, the two types of divided core portions 10 will be described separately. As Figure 37 shown, in the first divided core portion 12, the fastening portion 5 is formed at a position away from the center line Q1 connecting the rotation center axis Q and the center of the circumferential direction X of the divided core portion 10. Here, it is formed at a portion at an angle θ26 to the left on the paper surface. Specifically, it is formed as an angle θ26 = 22.5 degrees.

[0089] In addition, outer peripheral concave portions 72 are respectively formed at both ends in the circumferential direction X of the outer peripheral surface 100 of the first divided core portion 12 and other fixed portions. The outer peripheral concave portions 72 are used for positioning or welding the core plates 8 to each other in the axial direction Z.

[0090] Next, as Figure 38As shown, in the second divided core portion 22, the fastening portion 5 is formed at a position away from the center line Q1 connecting the rotation center axis Q and the center of the circumferential direction X of the divided core portion 10, specifically, at a position forming an angle θ27 to the right on the paper surface. Specifically, it is formed at an angle θ27 = 22.5 degrees. Thus, the fastening portion 5 of the first divided core portion 12 and the fastening portion 5 of the second divided core portion 22 are formed at positions symmetrical with respect to the center line Q1.

[0091] In addition, outer peripheral concave portions 72 are respectively formed at both ends in the circumferential direction X of the outer peripheral surface 200 of the second divided core portion 22 and other fixed portions. The outer peripheral concave portions 72 are used for positioning or welding of the core plates 8 in the axial direction Z.

[0092] In addition, as Figure 39 shown, the first layer of core plates 81 of the stator core portion 80 is formed with four pieces of the first divided core portion 12 arranged in the circumferential direction X. In addition, as Figure 40 shown, the second layer of core plates 82 of the stator core portion 80 is formed with four pieces of the second divided core portion 22 arranged in the circumferential direction X. In addition, in the stator core portion 80, in the axial direction Z, the first layer of core plates 81 and the second layer of core plates 82 are sequentially laminated.

[0093] In addition, as shown in the first layer of core plates 81 and the second layer of core plates 82, if the core plates 8 provided with the first divided core portion 12 and the second divided core portion 22 are sequentially laminated in the axial direction Z, the fastening portions 5 of different types of divided core portions 10 such as the fastening portion 5 of the first divided core portion 12 and the fastening portion 5 of the second divided core portion 22 are laminated up and down in the axial direction Z.

[0094] Thus, above and below in the axial direction Z, as Figure 36 shown, on the upper side in the axial direction Z, four abutting portions L1 in the circumferential direction X of the divided core portions 10 are formed. On the lower side in the axial direction Z, four abutting portions L2 are formed at the overlapping positions shown by the dotted lines offset in the circumferential direction X from the just-mentioned abutting portions L1.

[0095] Therefore, when laminating the core plates 8, it is only necessary to sequentially laminate the first layer of core plates 81 and the second layer of core plates 82 after the third layer. Thus, similar to the lamination relationship of the first layer of core plates 81 and the second layer of core plates 82 shown previously, the fastening portions 5 and the fastening holes 51 are arranged to coincide with each other in the axial direction Z, so that an installation portion that can be fastened to the frame 95 can be formed. In addition, in the stator core portion 80, the different abutting portions L1 and abutting portions L2 in the axial direction Z are formed in a lapped structure (brickwork stacking state), so that the rigidity of the stator core portion 80 can be ensured and the material yield can be improved.

[0096] In addition, as another example of the fifth embodiment, a case where the first layer core plate 81 and the second layer core plate 82 of the divided core portion 10 are turned over in the front and back directions will be described. As Figure 39 shown, the first layer core plate 81 is configured to arrange four first divided core portions 12 in the circumferential direction X in the same manner as in the above case. In addition, as Figure 41 shown, the second layer core plate 82 is configured to arrange four reverse first divided core portions 120, which are the first divided core portions 12 turned over in the front and back directions, in the circumferential direction X.

[0097] If the first layer core plate 81 and the second layer core plate 82 are configured in this way and stacked in sequence along the axial direction Z, the stator core portion 80 is configured in an overlapping arrangement of the abutting portion L1 and the abutting portion L2, and thus can be formed in the same manner as in the above embodiments.

[0098] In addition, the two types of divided core portions 2 with fastening portions, namely the first divided core portion 12 and the reverse first divided core portion 120, can be formed by the same die. Therefore, here, two types of divided core portions 10 can be manufactured by one die, thereby reducing the types of dies and the cost. In addition, since the divided core portions 10 are used by turning them over in the front and back directions, the thickness deviation of the electromagnetic steel sheet can be reduced. In addition, the blanking burrs generated during blanking are not aligned with the stacking direction, so short circuits in the stacking direction can be suppressed, and thus eddy current losses can be reduced.

[0099] According to the stator core portion, stator, and rotating electric machine of the fifth embodiment configured as described above, the stator core portion is formed by laminating a plurality of core plates in the axial direction, the core plates are formed by arranging divided core portions in contact with each other in the circumferential direction. The divided core portions have a plurality of pole teeth and are divided in the circumferential direction, and the number of divisions N is 4 or more, where N is an integer. A fastening portion is formed on the outer peripheral side of the core plate. The fastening portion protrudes outward in the radial direction and has a fastening hole for fastening the core plates to each other in the stacking direction. The connecting portion has: the number M of the fastening portions in the circumferential direction is formed to be three or more, where M is an integer, and has a relationship of N≥M. The divided core portion has a plurality of types of divided core portions with fastening portions. Among them, the fastening portions are arranged at a plurality of different positions away from the center line connecting the rotation center axis of the rotating electric machine and the circumferential center of the divided core portion. The fastening portions of different types of the divided core portions with fastening portions are stacked above and below in the stacking direction. In the core plate, the abutting portions of the divided core portions are arranged at different positions in the circumferential direction above and below in the stacking direction. The fastening holes of the fastening portion are formed to communicate in the stacking direction. Therefore, even when the number of divisions N is equal to the number of fastening portions M, similar to the above-described embodiments, it is possible to achieve both an improvement in material yield and a design freedom of the fastening portion.

[0100] In addition, in the above-described embodiments, an example in which the divided core portion 10 is evenly divided in the circumferential direction X is shown, but it is not limited thereto. For example, it is also possible to consider a case where the first divided core portion and the second divided core portion have the same circumferential angle, and the divided core portion without the fastening portion is formed to have an angle larger than the circumferential angle of the first divided core portion and the second divided core portion, or an angle that is half of the circumferential angle of the first divided core portion and the second divided core portion. In this case, the proportion of the divided core portion without the fastening portion in the core plate increases, thereby enabling an improvement in the material yield of the core plate as a whole or an improvement in the material yield of the divided core portion without the fastening portion itself.

[0101] This application describes various exemplary embodiments and examples, but the various features, modes, and functions described in one or more embodiments are not limited to being applied to a specific embodiment, and can be applied to embodiments alone or in various combinations. Therefore, countless variations that are not illustrated are envisioned within the technical scope disclosed in this application. For example, it includes cases where at least one component is deformed, cases where at least one component is added, or cases where at least one component is omitted. In addition, it also includes cases where at least one component is extracted and combined with components of other embodiments. Reference Signs

[0102] 1 First divided core part; 10 Divided core part; 100 Outer peripheral surface; 101 One abutting part; 102 The other abutting part; 111 Protrusion; 112 Recess; 11 First divided core part; 12 First divided core part; 120 Reverse first divided core part; 2 Second divided core part; 200 Outer peripheral surface; 201 One abutting part; 202 The other abutting part; 21 Second divided core part; 22 Second divided core part; 211 Protrusion; 212 Recess; 220 Reverse second divided core part; 3 Divided core part without fastening part; 300 Outer peripheral surface; 301 One abutting part; 302 The other abutting part; 330 Reverse divided core part without fastening part; 311 Protrusion; 312 Recess; 4 Third divided core part; 400 Outer peripheral surface; 401 One abutting part; 402 The other abutting part; 411 Protrusion; 412 Recess; 5 Fastening part; 51 Fastening hole; 72 Outer peripheral recess; 720 Groove part; 8 Core plate; 800 Outer peripheral surface; 9 Pole tooth; 90 Rotating electric machine; 91 Stator; 92 Rotor; 93 Coil; 931 End part; 95 Frame; H1 Feed pitch; H2 Feed pitch; H3 Feed pitch; L1 Abutting position; L2 Abutting position; P Pilot hole; Q Rotation center axis; Q1 Center line; W1 Material width; W2 Material width; W3 Material width; X Circumferential direction; Y Radial direction; Z Axial direction; θ1 Angle; θ11 Angle; θ21 Angle; θ22 Angle; θ23 Angle; θ24 Angle; θ25 Angle; θ26 Angle; θ27 Angle; θ3 Angle; θ4 Angle; θ5 Angle.

Claims

1. A stator core of a rotating electrical machine, characterized in that, the stator core is formed by axially laminating a plurality of core plates, the core plates are formed by circumferentially arranging segmented cores in contact with each other, the segmented cores have a plurality of pole teeth and are segmented circumferentially, and the number of segments N is 4 or more, where N is an integer, a fastening portion is formed on the outer peripheral side of the core plate, the fastening portion protrudes radially outward, and has a fastening hole for fastening the core plates to each other in the stacking direction, the number M of the fastening portions in the circumferential direction is formed to be three or more, where M is an integer, and has a relationship of N≥M, the segmented core has a plurality of types of segmented cores with fastening portions, wherein the fastening portions are arranged at a plurality of different positions away from the center line connecting the rotation center axis of the rotating electrical machine and the circumferential center of the segmented core, the fastening portions of different types of the segmented cores with fastening portions are stacked above and below in the stacking direction, in the core plate, the abutting portions of the segmented cores are arranged at different positions in the circumferential direction above and below in the stacking direction, the fastening holes of the fastening portions are formed to communicate in the stacking direction.

2. The stator core of a rotating electrical machine according to claim 1, characterized in that, has a relationship of N>M, the segmented core has a segmented core without a fastening portion where the fastening portion is not formed.

3. The stator core of a rotating electrical machine according to claim 1 or 2, characterized in that, when there are at least two types of the segmented cores with fastening portions, and one of them is taken as the first segmented core and the other is taken as the second segmented core, the fastening portion of the first segmented core and the fastening portion of the second segmented core are formed at positions symmetrical about the center line.

4. The stator core of a rotating electrical machine according to any one of claims 1 to 3, characterized in that, as the segmented core with a fastening portion, there are three or more types.

5. The stator core of a rotating electrical machine according to any one of claims 1 to 4, characterized in that, the number of segments N of the core plate is formed to be N = 6, the number M of the fastening portions is formed to be M = 3 or M = 4, the fastening portions are arranged at intervals of (360 degrees / M) in the circumferential direction.

6. The stator core of a rotating electrical machine according to any one of claims 1 to 5, characterized in that, the segmented cores are bonded and fixed to each other in the stacking direction.

7. The stator core of a rotating electrical machine according to any one of claims 1 to 6, characterized in that, the core plate is formed at a position where the outer peripheral concave portions are connected in the stacking direction on the outer peripheral surface.

8. The stator core of a rotating electrical machine according to claim 7, characterized in that, a welding portion for fixing the segmented cores in the stacking direction is provided in a groove portion formed by the outer peripheral concave portions connected in the stacking direction.

9. The stator core of a rotating electrical machine according to any one of claims 1 to 8, characterized in that, the core plate is configured to have a plurality of types by flipping the segmented cores forward and backward.

10. The stator core of a rotating electrical machine according to any one of claims 1 to 9, characterized in that, The divided core part of the core plate is formed by being evenly divided in the circumferential direction.

11. A stator, characterized in that the stator includes: the stator core part of the rotating electric machine according to any one of claims 1 to 10; and a coil wound around the pole teeth of the stator core part via an insulator.

12. A rotating electric machine, characterized in that it includes: the stator according to claim 11; and a rotor, the rotor being opposed to the stator with a gap therebetween and configured to be rotatable freely.

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