Title of invention: Winding iron core
Technical field
[0001]
　The present invention relates to a wound iron core, and is particularly suitable for use in an iron core formed by stacking a plurality of bent soft magnetic plates in the plate thickness direction.
Background technology
[0002]
　A soft magnetic plate such as an electromagnetic steel plate is configured by bending each corner of the iron core in advance, cutting the soft magnetic plate to a predetermined length, and stacking the soft magnetic plates in the plate thickness direction. There is an iron core to be done.
　In Patent Document 1, as this type of iron core, a plurality of soft magnetic plates having different lengths bent in an annular shape are superposed in the plate thickness direction, and the opposite end faces of the soft magnetic plates are formed in the plate thickness direction. A wound iron core in which the joints between the end faces are stepped in a staircase shape is described so as to be evenly displaced by a predetermined dimension.
[0003]
　Further, Patent Document 2 describes the following wound iron cores. First, a silicon steel plate strip is wound a predetermined number of times so as to have a circular shape with a predetermined dimension and a cross-sectional area having a predetermined thickness by a one-turn cut method in which a thin strip of silicon steel plate is cut at one place for each winding. Is fixed by a fixing band to form a wound steel core body. Then, the wound iron core body is deformed into a substantially elliptical shape by pressing the corresponding two points of the wound iron core element with a press machine or the like. Further, Patent Document 2 describes that strain-removing annealing is performed by sandwiching a wound iron core with a jig.
[0004]
　Further, in Patent Document 3, a transformer capable of inserting an electromagnetic steel sheet even when the gap at the coil frontage is narrowed, eliminating deformation of the electrical steel sheet, reducing wrapping points, and reducing deterioration of iron loss. Is described.
[0005]
　Further, Patent Document 4 describes that the gaps formed at the corners of the iron core block are used as passages for flowing a cooling medium such as air or oil.
Prior art literature
Patent documents
[0006]
Patent Document 1: Utility Model Registration No. 3081863
Patent Document 2: JP-A-2005-286169
Patent Document 3: Patent No. 6466728
Patent Document 4: Patent No. 6450100
Outline of the invention
Problems to be solved by the invention
[0007]
　However, in the techniques described in Patent Documents 1 and 2, there is only one joint portion of the wound iron core (one location where the end faces of the soft magnetic plate face each other in each layer). If there is only one joint of the wound core, the load of lacing (work to install the winding (coil) on the wound core) is large. Therefore, it is conceivable to reduce the lacing load by a structure in which two joints are provided on each of the two legs of the wound iron cores facing each other at a distance from each other, for a total of two joints.
[0008]
　However, in this case, when the soft magnetic plate is joined, the soft magnetic plate enters between the soft magnetic plate and the soft magnetic plate of the bonding partner, so that the wound iron core may be deformed and may not have a predetermined shape. There is. Further, the deformation of the wound iron core may increase the iron loss.
[0009]
　For this reason, it is required that the end faces of the soft magnetic plate of each layer are surely brought into contact with each other at the above-mentioned two joints in total. However, in the case where the positions of the end faces to which the electromagnetic steel sheets are joined are displaced in a step-like manner at the joint portion, the end faces can be joined if the end faces displaced in a step-like manner cannot be aligned with each other. It disappears. Therefore, it is necessary to accurately align the joints in the direction orthogonal to the surface of the electrical steel sheet. In particular, when a method of bending a soft magnetic material plate in advance, cutting it to a predetermined length, and then stacking the soft magnetic material plates in the plate thickness direction as described in Patent Document 1 is adopted, each soft magnetic material is used. When the plates are stacked on top of each other, misalignment is likely to occur, and it is necessary to improve them.
[0010]
　On the other hand, in Patent Document 3, when the gap at the coil frontage becomes narrow, the U-shaped electromagnetic steel sheet is inserted into the coil frontage, so that the insertion work with a narrow gap is performed rather than using only the one-turn cut type electromagnetic steel sheet. It's easy. However, in this method, since the outside of the one-turn cut type electrical steel sheet is covered with the U-shaped electrical steel sheet, there is a problem that the temperature inside the transformer rises due to the heat generated at the corners of the electrical steel sheet. In particular, when the corner portion of the wound iron core is provided with a bent portion having a small radius of curvature, heat is generated due to iron loss deterioration due to the influence of strain introduced in the bent portion, so that it is necessary to reliably suppress the generation of heat.
[0011]
　Patent Document 4 describes that the gaps formed at the corners of the iron core block are used as passages for flowing a cooling medium such as air or oil. However, simply forming a gap may not provide a desired cooling effect when a transformer is configured using a wound iron core. Further, in order to satisfy the performance as a transformer, a noise suppression effect is required as well as a cooling effect. Patent Document 4 does not assume any configuration of a transformer that simultaneously satisfies the cooling effect and the noise suppression effect.
[0012]
　The present invention has been made in view of the above problems, and joins the end faces of a plurality of soft magnetic plates that are overlapped in the plate thickness direction and bent at the corners of the iron core. At that time, it is an object of suppressing the position of the end face from deviating from a desired position.
Means to solve problems
[0013]
　In the wound iron core of the present invention, the first corner portion and the second corner portion, the third corner portion and the fourth corner portion are arranged at intervals in the first direction, respectively. The first corner portion and the third corner portion, the second corner portion and the fourth corner portion each have an interval in a second direction perpendicular to the first direction. The wound iron cores that are arranged, each of which is a plurality of soft magnetic material plates having a shape bent at positions corresponding to the first corner portion and the second corner portion, and the plate surfaces are opposed to each other. A first portion having a plurality of soft magnetic plates stacked so as to overlap each other, and a plurality of soft magnets having a shape bent at positions corresponding to the third corner portion and the fourth corner portion, respectively. The soft body plate, which has a second portion having a plurality of soft magnetic material plates stacked so that the plate surfaces overlap each other, and a third portion, and constitutes the first portion. The longitudinal end of the magnetic plate and the longitudinal end of the soft magnetic plate constituting the second portion are abutted in the second direction, and the abutment is formed. The position of the state portion in the circumferential direction of the wound iron core is deviated in the second direction, and the end portion in the longitudinal direction of the soft magnetic material plate constituting the first portion and the second portion are separated from each other. The state in which the longitudinal end portions of the soft magnetic plate constituting the soft magnetic material plate are abutted with each other in the second direction is maintained, and the third portion is the first portion and the second portion. At least a part of the area at one end of the third portion and at least a part of the region at the other end of the third portion are arranged in the window portion which is an inner region, respectively. It is characterized in that it is in contact with the inner peripheral surface of the window portion in the second direction.
Effect of the invention
[0014]
　According to the present invention, when the end faces of a plurality of soft magnetic plates that are overlapped in the plate thickness direction and bent at the corners of the iron core are joined to each other, the positions of the end faces deviate from the desired positions. Can be suppressed.
A brief description of the drawing
[0015]
FIG. 1 shows a first embodiment and is a view of a wound iron core viewed from an angle.
FIG. 2 shows a first embodiment and is a front view of a wound iron core.
FIG. 3 is a diagram showing a first embodiment and magnifying the vicinity of a first corner portion.
FIG. 4 is a diagram illustrating a first embodiment and schematically showing an example of a bent portion of a grain-oriented electrical steel sheet.
FIG. 5 is a schematic view showing a first embodiment and showing an example of a bending method.
FIG. 6 is a schematic view showing a first embodiment and showing an example of an assembly method.
FIG. 7 shows a first modification of the first embodiment and is a front view of the wound iron core.
FIG. 8 is a diagram showing a first modification of the first embodiment and enlarging the vicinity of the first corner portion.
FIG. 9 shows a second modification of the first embodiment, and is a front view of the wound iron core.
FIG. 10 is a diagram showing a second modification of the first embodiment and enlarging the vicinity of the first corner portion.
FIG. 11 shows a second embodiment and is a view of a wound iron core viewed from an angle.
FIG. 12 shows a third embodiment, and is a view of a wound iron core viewed from an angle.
FIG. 13 shows a third embodiment and is a front view of the wound iron core.
FIG. 14 is a schematic view showing a third embodiment and showing an example of an assembly method.
FIG. 15 shows a fourth embodiment and is a view of a wound iron core viewed from an oblique angle.
FIG. 16 shows a fourth embodiment and is a front view of a wound iron core.
FIG. 17 is a schematic view showing a fourth embodiment and showing an example of an assembly method.
FIG. 18 is a schematic view showing a modified example of the fourth embodiment and showing an example of an assembly method.
FIG. 19 is a schematic view showing an example of an assembly method following FIG.
FIG. 20 shows a fifth embodiment and is a view of a wound iron core viewed from an angle.
FIG. 21 shows a fifth embodiment and is a front view of a wound iron core.
FIG. 22 is a schematic view showing a fifth embodiment and showing an example of an assembly method.
FIG. 23 is a schematic view showing an example of an assembly method following FIG. 22.
FIG. 24 shows a first modification of the fifth embodiment and is a front view of the wound iron core.
FIG. 25 shows a second modification of the fifth embodiment and is a front view of the wound iron core.
FIG. 26 shows a sixth embodiment and is a view of a wound iron core viewed from an oblique angle.
FIG. 27 shows a sixth embodiment and is a front view of the wound iron core.
FIG. 28 shows a modified example of the sixth embodiment, and is a view of the wound iron core viewed from the front.
FIG. 29 is a front view of the wound iron core 2700 of the seventh embodiment.
FIG. 30: At each of the first corner, the second corner, the third corner, and the fourth corner, between the third portion and the first or second portion. It is a schematic diagram which shows another aspect of the structure provided with a gap.
FIG. 31, in the fifth embodiment, the length in the plate width direction of the grain-oriented electrical steel sheet constituting the third portion is set to the plate width of the grain-oriented electrical steel sheet constituting the first portion and the second portion. It is a perspective view which shows the example which made it longer than the length in a direction.
[Fig. 32] In the configuration example shown in FIG. 29, the length of the grain-oriented electrical steel sheet constituting the third portion in the plate width direction is set to the plate of the grain-oriented electrical steel sheet constituting the first portion and the second portion. It is a perspective view which shows the example which made it longer than the length in the width direction.
[Fig. 33] In the configuration example shown in FIG. 30, the length in the plate width direction of the grain-oriented electrical steel sheet constituting the third portion is set to the plate of the grain-oriented electrical steel sheet forming the first portion and the second portion. It is a perspective view which shows the example which made it longer than the length in the width direction.
FIG. 34 is a front view of the wound iron core of the seventh embodiment, and is a schematic view showing an example in which the third portion shown in FIG. 29 is divided into two.
FIG. 35 is a schematic diagram showing an example in which the configuration shown in FIG. 34 is more generalized and the third portion is divided into n pieces.
FIG. 36 is a schematic view showing an example in which the outer shape of a third portion adjacent to a gap is linear in the configuration example shown in FIG. 34, similar to the configuration example of FIG. 30.
37 is a schematic view showing an example in which the outer shape of the third portion adjacent to the gap is linear in the configuration example shown in FIG. 35, similar to the configuration example of FIG. 30.
Mode for carrying out the invention
[0016]
　Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, the XYZ coordinates indicate the relationship of directions in each figure, and the origin of the coordinates is not limited to the position shown in each figure. In addition, the symbol with a cross in the circle indicates the direction from the front side to the back side of the paper.
　Also, as used herein, terms such as "parallel", "along", "vertical", "right angle", "same", "same", etc., which specify the shape and geometric conditions and their degree. In addition, the values ​​of direction, length, angle, etc. shall be interpreted including the range in which a function equivalent to the described function can be expected without being bound by a strict meaning. For example, if it is within the tolerance in the design, it can be treated as a range in which a function equivalent to the described function can be expected.
[0017]
　FIG. 1 is a view of the wound iron core 100 viewed from an angle. In FIG. 1, for convenience of notation, the winding (coil) installed on the wound iron core 100 is not shown.
　In FIG. 1, the wound iron core 100 has a first portion 110, a second portion 120, and a third portion 130. A band 140 is attached to the outer peripheral surface of the wound iron core 100. A mounting bracket or the like for fixing the position of the wound iron core 100 is also attached to the band 140, but for convenience of notation, the mounting bracket or the like is omitted in FIG. Further, the band 140 can be realized by a known technique and is not limited to the one shown in FIG.
[0018]
　FIG. 2 is a front view of the winding iron core 100. In FIG. 2, for convenience of notation, the winding (coil) and the band 140 installed on the wound iron core 100 are not shown.
　In FIGS. 1 and 2, the wound iron core 100 has four corner portions, that is, a first corner portion 101, a second corner portion 102, a third corner portion 103, and a fourth corner portion 104.
　The first corner portion 101 and the second corner portion 102 are arranged at intervals in the Z-axis direction (first direction), and the third corner portion 103 and the fourth corner portion 104 are also arranged with a Z-axis direction. They are arranged at intervals in the direction (first direction). Further, the first corner portion 101 and the third corner portion 103 are arranged at intervals in the X-axis direction (second direction), and the second corner portion 102 and the fourth corner portion 104 are also arranged. They are arranged at intervals in the X-axis direction (second direction).
[0019]
　The first portion 110 is a plurality of soft magnetic material plates having a shape bent at positions corresponding to the first corner portion 101 and the second corner portion 102, respectively, so that the plate surfaces overlap each other. It has a plurality of stacked soft magnetic plates. The second portion 120 is a plurality of soft magnetic material plates having a shape bent at positions corresponding to the third corner portion 103 and the fourth corner portion 104, respectively, so that the plate surfaces overlap each other. It has a plurality of stacked soft magnetic plates. The soft magnetic material plate is, for example, a grain-oriented electrical steel plate. The direction from the first corner portion 101 to the second corner portion 102 of the grain-oriented electrical steel sheet (direction perpendicular to the plate width direction and the plate thickness direction) coincides with the rolling direction (cut out so as to be). In the following description, a case where the soft magnetic material plate is a grain-oriented electrical steel plate will be described as an example. The thickness of the grain-oriented electrical steel sheet is not particularly limited and may be appropriately selected depending on the intended use, etc., but is usually in the range of 0.15 mm to 0.35 mm, preferably 0.18 mm to 0. The range is .23 mm. The grain-oriented electrical steel sheets forming the first portion 110 and the second portion 120 may be made of the same plate (thickness, composition, structure, etc.).
[0020]
　A surface (end surface) of one end (first end) of the grain-oriented electrical steel sheet forming the first portion 110 in the longitudinal direction and one end in the longitudinal direction of the grain-oriented electrical steel sheet forming the second portion 120 (end face). The surface (end surface) of the first end portion) is in a state of being butted with each other in the X-axis direction (second direction). Similarly, the surface (end face) of the other end (second end) in the longitudinal direction of the grain-oriented electrical steel sheet forming the first portion 110 and the longitudinal direction of the grain-oriented electrical steel sheet forming the second portion 120. The other end (second end) surface (end surface) of the is abutted against each other in the X-axis direction (second direction).
[0021]
　At this time, as shown in FIGS. 1 and 2, the plate surface of the grain-oriented electrical steel sheet forming the first portion 110 and the plate surface of the grain-oriented electrical steel sheet constituting the second portion 120 overlap each other. , The surface (end face) of the longitudinal end of the grain-oriented electrical steel sheet forming the first portion 110 and the surface (end face) of the end in the longitudinal direction of the grain-oriented electrical steel sheet forming the second portion 120. Are butted in the X-axis direction (second direction). Further, as shown in FIGS. 1 and 2, the surface (end surface) of the end portion in the longitudinal direction of the grain-oriented electrical steel sheet forming the first portion 110 and the grain-oriented electrical steel sheet forming the second portion 120. The position in the circumferential direction of the wound steel core 100 at the portion (joint portion) in which the end surface (end surface) in the longitudinal direction is abutted is a position that is periodically deviated in the X-axis direction (second direction). It has become. In this way, the surface (end surface) of the longitudinal end of the grain-oriented electrical steel sheet forming the first portion 110 and the longitudinal end of the grain-oriented electrical steel sheet forming the second portion 120. The positions (joints) where the surfaces (end faces) are butted in the X-axis direction (second direction) are the same in the circumferential direction of the wound steel core 100, and the end faces are aligned in the X-axis direction (second direction). ), The magnetic resistance in the wound iron core 100 can be made smaller, and the iron loss can be reduced.
[0022]
　Further, the region of the first portion 110 between the first corner portion 101 and the second corner portion 102 is a first rectangular parallelepiped portion 105 whose longitudinal direction is parallel to the Z axis. The region of the second portion 120 between the third corner portion 103 and the fourth corner portion 104 is also a second rectangular parallelepiped portion 106 whose longitudinal direction is parallel to the Z axis. The region of the first portion 110 and the second portion 120 between the first corner portion 101 and the third corner portion 103 is a third rectangular parallelepiped portion 107 whose longitudinal direction is parallel to the X axis. .. The region of the first portion 110 and the second portion 120 between the second corner portion 102 and the fourth corner portion 104 is also a fourth rectangular parallelepiped portion 108 whose longitudinal direction is parallel to the X axis. ..
[0023]
　The third portion 130 has a plurality of grain-oriented electrical steel sheets stacked so that the plate surfaces overlap each other. The longitudinal direction of the grain-oriented electrical steel sheet (the direction perpendicular to the plate width direction and the plate thickness direction) is the same as the rolling direction.
　As shown in FIGS. 1 and 2, the plurality of grain-oriented electrical steel sheets constituting the third portion 130 of the present embodiment are flat plates (that is, X-axis) arranged so that their longitudinal directions are in the X-axis direction. It is a flat plate extending in the direction (that is, the plate surface of the grain-oriented electrical steel sheet is not bent).
　Further, as shown in FIGS. 1 and 2, the third portion 130 is arranged in a window portion which is an inner region of the first portion 110 and the second portion 120. Further, one surface of the third portion 130 in the Z-axis direction (the plate surface of the grain-oriented electrical steel sheet located on the most positive direction side of the Z-axis among the grain-oriented electrical steel sheets constituting the third portion 130) is , Of the inner peripheral surfaces of the first portion 110 and the second portion 120, the third portion is arranged at a position in contact with the inner peripheral surface between the first corner portion 101 and the third corner portion 103. The other surface of the portion 130 in the Z-axis direction (the surface of the grain-oriented electrical steel sheet located on the negative direction side of the Z-axis of the grain-oriented electrical steel sheets constituting the third portion 130) is the third. It is not arranged at a position in contact with the inner peripheral surface between the corner portion 103 and the fourth corner portion 104. The length of the third portion 130 in the X-axis direction is the same as the length of the window portion in the X-axis direction at the position where the third portion 130 is arranged. That is, at least a part of one end portion (first end portion) in the longitudinal direction of the third portion 130 is in contact with the inner peripheral surface of the first portion 110, and the other end in the longitudinal direction of the third portion 130. At least a portion of the portion (second end) is in contact with the inner peripheral surface of the second portion 120. The thickness of the third portion 130 (the length of the grain-oriented electrical steel sheet in the plate thickness direction) is the longitudinal end of the grain-oriented electrical steel sheet constituting the first portion 110 and the second portion when the band 140 is attached. The thickness of the first portion 110 (second portion 120) (thickness of the grain-oriented electrical steel sheet) in order to prevent the position of the grain-oriented electrical steel sheet constituting the portion 120 from being displaced from the longitudinal end portion. It is preferably 0.001 times or more the length in the direction (the length in the plate thickness direction of the leg of the original wound steel core).
[0024]
　In each figure, for convenience of notation, the number of grain-oriented electrical steel sheets does not always match the actual number.
　The band 140 is attached (wound) to the outer peripheral surface of the winding iron core 100 composed of the first portion 110, the second portion 120, and the third portion 130 arranged as described above. As for the band 140, for example, a mounting bracket or the like for the wound iron core 100 may be attached to the band 140 made of stainless steel, but for convenience of notation, the mounting bracket and the like are not shown in FIG.
[0025]
　Here, in the following description, the portion of the wound core 100 composed of the first portion 110 and the second portion 120 is referred to as a wound core main body, if necessary. In the present embodiment, the iron core length of the wound iron core body is not particularly limited. However, even if the iron core length changes in the iron core, the volume of the bent portion of the iron core is constant. Therefore, the iron loss generated at the bent portion of the iron core is constant, and the longer the iron core length, the smaller the volume fraction of the bent portion of the iron core (= the volume of the bent portion of the iron core ÷ the volume of the entire iron core). Therefore, the longer the iron core length, the smaller the influence on the deterioration of iron loss due to the bent portion of the iron core. Therefore, the iron core length of the wound iron core body is preferably 1.5 m or more, and more preferably 1.7 m or more. The core length of the wound core body is the stacking direction of the directional electromagnetic steel plate of the wound core body when the wound core is viewed from the plate width direction (Y-axis direction) of the soft magnetic steel plate (oriented electrical steel sheet). The length in the circumferential direction of the winding iron core at the central point in.
　Further, since the wound iron core has reduced iron loss, it can be suitably used for any conventionally known application such as a magnetic core of a transformer, a reactor, a noise filter or the like.
[0026]
　As described above, the wound iron core main body has a corner portion (first corner portion 101 to fourth corner portion 104) and a rectangular parallelepiped portion (first rectangular parallelepiped portion 105 to fourth rectangular parallelepiped portion) in the circumferential direction of the wound iron core 100. Part 108) and the like are present alternately and continuously. In the examples shown in FIGS. 1 and 2, counterclockwise toward the paper surface, the first corner portion 101 → the first rectangular parallelepiped portion 105 → the second corner portion 102 → the fourth rectangular parallelepiped portion 108 → the fourth Corner portion 104 → second rectangular parallelepiped portion 106 → third corner portion 103 → third rectangular parallelepiped portion 107 → first corner portion 101 → ... A portion 104 and a first rectangular parallelepiped portion 105 to a fourth rectangular parallelepiped portion 108 are arranged.
[0027]
　In the present embodiment, two rectangular parallelepiped portions (first rectangular parallelepiped portion 105 to fourth rectangular parallelepiped portion 108) adjacent to each other with each corner portion (first corner portion 101 to fourth corner portion 104) sandwiched between them. The angle of formation is 90 °. In the examples shown in FIGS. 1 and 2, the angle formed by the first rectangular parallelepiped portion 105 and the fourth rectangular parallelepiped portion 108, the angle formed by the second rectangular parallelepiped portion 106 and the fourth rectangular parallelepiped portion 108, and the second rectangular parallelepiped portion 108. The angle formed by the portions 106 and the third rectangular parallelepiped portion 107 and the angle formed by the first rectangular parallelepiped portion 105 and the third rectangular parallelepiped portion 107 are 90 °, respectively.
[0028]
　Further, when the wound iron core 100 is viewed from the plate width direction (Y-axis direction) of the grain-oriented electrical steel sheet, each corner portion (first corner portion 101 to fourth corner portion 104) has a curved shape. It has two bent portions, and the total bending angle of each of the bent portions existing in one corner portion is 90 °.
[0029]
　FIG. 3 is an enlarged view showing the vicinity of the first corner portion 101. Since the shapes of the second corner portion 102, the third corner portion 103, and the fourth corner portion 104 are the same as the shape of the first corner portion 101, here, the second corner portion 102 , A detailed description of the third corner portion 103 and the fourth corner portion 104 will be omitted.
　In FIG. 3, the bent portions 101a and 101b have a curved shape. The region between the bent portions 101a and 101b is the flat portion 101c.
　One corner is composed of one or more bent parts. Therefore, the bent portion is continuous to the rectangular parallelepiped portion via the flat portion, and the flat portion and the bent portion are alternately continuous according to the number of the bent portions in one corner portion, and the corner portion is followed by the bent portion. In the last bent portion in the above, a rectangular parallelepiped portion adjacent to the rectangular parallelepiped portion is continuous via a flat portion with the corner portion sandwiched between them. In the example shown in FIG. 3, the bent portion 101a is continuous with the first rectangular parallelepiped portion 105 via the flat portion 101d, the flat portion 101c and the bent portion 101b are continuous in this order following the bent portion 101a, and the bent portion 101b. The third rectangular parallelepiped portion 107 is continuous via the flat portion 101e. The flat portions 101d and 101e may not be provided.
[0030]
　In the example shown in FIG. 3, the region from the line segment α-α'to the line segment β-β'is designated as the first corner portion 101. The point α is an end point on the inner peripheral surface of the first corner portion 101 on the side of the first rectangular parallelepiped portion 105. The point α'is
the intersection of a straight line passing through the point α and perpendicular to the plate surface of the grain-oriented electrical steel sheet and the outer peripheral surface of the wound steel core 100 (first portion 110). Similarly, the point β is an end point on the inner peripheral surface of the first corner portion 101 on the third rectangular parallelepiped portion 107 side, and the point β'is a direction passing through the point β and
perpendicular to the plate surface of the directional electromagnetic steel plate. This is the intersection of the straight line and the outer peripheral surface of the wound iron core 100 (first portion 110). In FIG. 3, the angle formed by the first rectangular parallelepiped portion 105 and the third rectangular parallelepiped portion 107 adjacent to each other with the first corner portion 101 in between is θ (= 90 °). The total of the bending angles φ1 and φ2 of the bent portions 101a and 101b in the first corner portion 101 (one corner portion) is 90 °.
[0031]
　Since the angle θ formed by two rectangular parallelepiped portions adjacent to each other with one corner portion in between is 90 °, when there are two or more bent portions in one corner portion, the bending angle of one bent portion. φ is less than 90 °. Further, when one bent portion is present in one corner portion, the bending angle φ of one bent portion is 90 °. From the viewpoint of suppressing the occurrence of strain due to deformation during processing and suppressing iron loss, the bending angle φ is preferably 60 ° or less, and more preferably 45 ° or less. As shown in FIGS. 1 to 3, when one corner has two bent portions, for example, φ1 = 60 ° and φ2 = 30 ° or φ1 = 45 ° from the viewpoint of reducing iron loss. Moreover, φ2 = 45 ° or the like can be set.
[0032]
　The bent portion will be described in more detail with reference to FIG. FIG. 4 is a diagram schematically showing an example of a bent portion (curved portion) of a grain-oriented electrical steel sheet. The bending angle of the bent portion means the angle difference that occurs between the flat portion on the rear side and the flat portion on the front side in the bending direction in the bent portion of the grain-oriented electrical steel sheet. Specifically, as shown in FIG. 4, in the bent portion of the grain-oriented electrical steel sheet, it is adjacent to both sides (points F and G) of the curved portion included in the line Lb representing the outer surface of the grain-oriented electrical steel sheet. It is expressed as the angle φ of the complementary angle (acute angle) of the angle formed by the two virtual lines Lb-elongation1 and Lb-elongation2 obtained by extending the straight line portion.
　The bending angle φ of each bending portion is less than 90 °, and the total bending angle of all the bending portions existing in one corner portion is 90 °.
[0033]
　In the present embodiment, the bent portions are points D and E on the line La representing the inner surface of the directional electromagnetic steel plate when the wound iron core is viewed from the plate width direction (Y-axis direction) of the directional electromagnetic steel plate. , And, when the points F and G on the line Lb representing the outer surface of the directional electromagnetic steel plate are defined as follows, the points D and E on the line La representing the inner surface of the directional electromagnetic steel plate. A line separated by, a line separated by points F and G on the line Lb representing the outer surface of the directional electromagnetic steel plate, a straight line connecting points D and E, and points F and G. The area surrounded by the straight line connecting with is shown.
[0034]
　Here, the points D, E, F, and G are defined as follows.
　A straight line adjacent to both sides of the center point A of the radius of curvature in the curved portion included in the line La representing the inner surface of the directional electromagnetic steel plate and the curved portion included in the curved portion Lb representing the outer surface of the directional electromagnetic steel plate. The origin C is the point where the straight line AB connecting the intersections B of the two virtual lines Lb-elongation1 and Lb-elongation2 obtained by extending the portion intersects with the line representing the inner surface of the directional electromagnetic steel plate.
　Further, a point D is defined as a point separated from the origin C by a distance m represented by the following equation (1) in one direction along the line La representing the inner surface of the grain-oriented electrical steel sheet.
　Further, a point E is defined as a point separated by the distance m in another direction along the line La representing the inner surface of the grain-oriented electrical steel sheet from the origin C.
　Further, among the straight line portions included in the line Lb representing the outer surface of the directional electromagnetic steel plate, the straight line portion facing the point D and the straight line portion facing the point D are drawn perpendicularly and pass through the point D. Let the point G be the intersection with the virtual line.
　Further, among the straight line portions included in the line Lb representing the outer surface of the directional electromagnetic steel plate, the straight line portion facing the point E and the straight line portion facing the point E are drawn perpendicularly and pass through the point E. Let point F be the intersection with the virtual line.
　m = r × (π × φ / 180) ・ ・ ・ (1) In
　equation (1), m represents the distance from the point C, and r represents the distance (radius of curvature) from the center point A to the point C. ..
[0035]
　That is, r indicates the radius of curvature when the curve near the point C is regarded as an arc, and the directional electromagnetic steel plate when the wound iron core is viewed from the plate width direction (Y-axis direction) of the directional electromagnetic steel plate. Represents the radius of curvature of the inner surface of. The smaller the radius of curvature r, the steeper the bending of the curved portion of the bent portion, and the larger the radius of curvature r, the gentler the bending of the curved portion of the bent portion. For example, the radius of curvature r of the bent portion can be in the range of more than 1 mm and less than 3 mm.
　In the wound steel core of the present embodiment, the radius of curvature at each bent portion of each grain-oriented electrical steel sheet laminated in the plate thickness direction may have some error. If there is an error, the radius of curvature of each bent portion is specified as the average value of the radius of curvature of each of the laminated electrical steel sheets. If there is an error, the error is preferably 0.1 mm or less.
　The method for measuring the radius of curvature of the bent portion is not particularly limited, but it can be measured by observing at 200 times using, for example, a commercially available microscope (Nikon ECLIPSE LV150).
[0036]
　Next, an example of the manufacturing method of the wound iron core 100 of the present embodiment will be described.
　Further, the lengths of the grain-oriented electrical steel sheets constituting the first portion 110 and the second portion 120 in the longitudinal direction and the plate width direction are determined according to the specifications of the wound steel core 100. When the first portion 110 and the second portion 120 are butted in the X-axis direction (second direction) as described later, two adjacent layers of the grain-oriented electrical steel sheets constituting the first portion 110 are formed. In order to prevent gaps from being formed in the two layers of grain-oriented electrical steel sheets, the outer peripheral surface of the grain-oriented electrical steel sheets arranged inside and the inner peripheral surface of the grain-oriented electrical steel sheets arranged outside are Determine the length in the longitudinal direction and the plate width direction of each grain-oriented electrical steel sheet so that they are equal. Then, the grain-oriented electrical steel sheet is cut so that the longitudinal direction is the rolling direction according to the length in the longitudinal direction and the length in the plate width direction of the determined grain-oriented electrical steel sheet.
[0037]
　Next, as shown in FIGS. 1 and 2, the surface (end surface) of the end portion in the longitudinal direction of the directional electromagnetic steel plate forming the first portion 110 and the directional electromagnetic wave forming the second portion 120. The position in the circumferential direction of the wound iron core 100 at the portion (joint portion) where the end surface (end surface) of the end portion in the longitudinal direction of the steel plate abuts in the X-axis direction (second direction) is the X-axis direction (second direction). The formation region of the corner portion, the position of the bent portion, and the bending angle of each directional electromagnetic steel plate are determined so as to periodically deviate in the direction).
　In the examples shown in FIGS. 1 to 3, bending is performed on two positions of the forming region of each corner of the grain-oriented electrical steel sheet, and the bent portion having a radius of curvature r of more than 1 mm and less than 3 mm is formed. By forming, the rectangular parallelepiped part (first rectangular parallelepiped part 105, second rectangular parallelepiped part 106, third rectangular parallelepiped part 107, fourth rectangular parallelepiped part 108) and corner part (first corner part 101, first corner part 101, first The second corner portion 102, the third corner portion 103, and the fourth corner portion 104) are alternately continuous, and the angle θ formed by the two rectangular parallelepiped portions adjacent to each other with the respective corner portions in between is 90 °. The directional electromagnetic steel sheet is formed so as to be.
[0038]
　FIG. 5 is a schematic view showing an example of a bending method in the method for manufacturing the wound iron core 100.
　The configuration of the processing machine is not particularly limited, but for example, as shown in FIG. 5A, the processing machine usually includes a die 502 and a punch 504 for press working, and a grain-oriented electrical steel plate 501. It has a guide 503 or the like for fixing. The grain-oriented electrical steel sheet 501 is transported in the transport direction 505 and fixed at a preset position (FIG. 5 (b)). Next, the grain-oriented electrical steel sheet is bent so as to have a bent portion having a bending angle φ by pressurizing with a predetermined force preset by the punch 504 in the direction (downward) of the arrow line shown in FIG. 5 (b). It will be processed.
　There is no particular limitation on the method of setting the radius of curvature r of the bent portion to a range of more than 1 mm and less than 3 mm, but usually, the distance between the die 502 and the punch 504 and the shape of the die 502 and the punch 504 are changed. Therefore, the radius of curvature r of the bent portion can be adjusted to a specific range.
　The grain-oriented electrical steel sheet is processed by setting the radius of curvature r at the bent portion of each grain-oriented electrical steel sheet laminated in the plate thickness direction to match. An error may occur depending on the roughness and shape of the surface layer. Even if an error occurs, the error is preferably 0.1 mm or less.
　As described above, the method for measuring the radius of curvature of the bent portion is not particularly limited, but it can be measured, for example, by observing at 200 times using a commercially available microscope (Nikon ECLIPSE LV150).
[0039]
　Then, the strain of the bent portion is removed by annealing for each of the grain-oriented electrical steel sheets obtained by bending as described above.
　After that, in each direction so that the plate surfaces of the grain-oriented electrical steel sheets subjected to the bending process and the strain-removing annealing as described above overlap each other so that the first portion 110 and the second portion 120 are configured. Stacking electrical steel sheets. In this way, the first portion 110 and the second portion 120 are prepared. At this time, the grain-oriented electrical steel sheets constituting the first portion 110 and the second portion 120 may be fixed so as not to be displaced. In addition, the first portion 110 and the second portion 120 may be configured at the time of assembly described later.
[0040]
　Next, the third part 130 will be described. First, the length in the plate width direction of the directional electromagnetic steel plate becomes the same as the length in the plate width direction of the directional electromagnetic steel plate constituting the first portion 110 and the second portion 120, and the length in the longitudinal direction. Is the length of the window portion (the area inside the first portion 110 and the second portion 120) in the X-axis direction, and is the length in the X-axis direction at the position where the directional electromagnetic steel plate is arranged. Cut so that they are the same. At this time, the grain-oriented electrical steel sheet is cut so that the longitudinal direction is the rolling direction. Further, the third portion 130 is configured so that the longitudinal end portion of each directional electromagnetic steel plate is surely in contact with the inner peripheral surface of the first portion 110 and the inner peripheral surface of the second portion 120. The design minimum value of the longitudinal length of the directional electromagnetic steel plate is the length of the window portion (the area inside the first portion 110 and the second portion 120) in the X-axis direction, and is in that direction. It can be the same as the design maximum value of the length in the X-axis direction at the position where the sex electromagnetic steel plate is arranged.
[0041]
　Then, the shape of the end portion in the longitudinal direction when viewed from the plate width direction (Y-axis direction) of the third portion 130 becomes the shape of the inner peripheral surface of the first corner portion 101 and the third corner portion 103. The cut directional electromagnetic steel sheets are stacked so that the plate surfaces are overlapped with each other, and the directional electromagnetic steel sheets are fixed so as not to move. Fixing of grain-oriented electrical steel sheets is realized by using, for example, an adhesive or the like. The adhesive preferably has magnetism.
[0042]
　For example, in designing, as shown in FIG. 3, when viewed from the plate width direction (Y-axis direction), the first of the longitudinal ends of the directional electromagnetic steel plate constituting the third portion 130. By deciding the position of each point 101f to 101m so that the points 101f to 101m in contact with the inner peripheral surface of the corner portion 101 are located on the function representing the shape of the inner peripheral surface of the first corner portion 101. The shape of the end portion in the longitudinal direction when viewed from the plate width direction (Y-axis direction) can be matched with the shape of the inner peripheral surface of the first corner portion 101. Of the longitudinal end portions of the grain-oriented electrical steel sheet constituting the third portion 130, the end portion in contact with the inner peripheral surface of the third corner portion 103 is also the inner peripheral surface of the first corner portion 101. The shape can be determined in the same manner as the contacting ends.
[0043]
　The shape of the end portion of the grain-oriented electrical steel sheet when viewed from the plate width direction (Y-axis direction) should be confirmed by observing at 200 times using, for example, a commercially available microscope (Nikon ECLIPSE LV150). Can be done.
　As described above, the third portion 130 is prepared. After stacking and fixing grain-oriented electrical steel sheets of the same shape and size, the shape of the end portion in the longitudinal direction matches the shape of the inner peripheral surface of the first corner portion 101 and the third corner portion 103. As described above, the grain-oriented electrical steel sheet may be processed. In addition, the third portion 130 may be configured at the time of assembly described later.
[0044]
　Further, a coil to be installed on the wound iron core 100 is prepared.
　After preparing the grain-oriented electrical steel sheet, the third portion 130, and the coil for forming the first portion 110 and the second portion 120 as described above, these are combined.
　FIG. 6 is a schematic view showing an example of an assembly method in the method for manufacturing the wound iron core 100.
　First, as shown in FIG. 6A, the third portion 130 is passed through the hollow portion of the coil 610.
　Next, as shown in FIG. 6B, one end portion (first end portion) of the first portion 110 and one end portion (first end portion) of the second portion 120 are formed into a third portion. Part 130 is located on the inner peripheral surface side of the first part 110 and the second part 120 (below the first part 110 and the second part 120 in FIG. 6B). Put it in the hollow part of the coil 610. At the same time, the other end (second end) of the first portion 110 and the other end (second end) of the second portion 120 are inserted into the hollow portion of the coil 620.
[0045]
　Then, as shown in FIG. 6 (c), one plate surface of the third portion 130 (the upper surface of the third portion 130 in FIG. 6 (b)) is the first portion 110 and the second portion 120. The surface (end surface) of one end (first end) of the first portion 110 and the surface (end surface) of one end (first end) of the second portion 120 in contact with the inner peripheral surface of the second portion 120. The end face) is abutted in the X-axis direction (second direction), and the other end (second end) surface (end face) of the first portion 110 and the other end of the second portion 120 are abutted. The surface (end surface) of (second end) is butted in the X-axis direction (second direction). If the longitudinal end of the third portion 130 is in contact with the inner peripheral surfaces of the first portion 110 and the second portion 120 when the band 140 described later is attached, in this state, the third portion 130 is attached. The longitudinal end of the portion 130 may or may not contact the inner peripheral surfaces of the first portion 110 and the second portion 120.
[0046]
　Next, as shown in FIG. 6 (c), the band 140 is attached to the outer peripheral surfaces of the first portion 110 and the second portion 120. When attaching the band 140, the first portion 110 and the second portion 120 are tightened. Therefore, among the grain-oriented electrical steel sheets constituting the first portion 110 and the second portion 120, the end surface (end surface) of the outermost peripheral grain-oriented electrical steel sheet is in the X-axis direction (second direction). The compressive force is concentrated on the abutted part (joint part). Then, starting from this portion, the longitudinal end of the grain-oriented electrical steel sheet forming the first portion 110 and the longitudinal end of the grain-oriented electrical steel sheet forming the second portion 120 are on the X-axis. At the points (joints) where they are abutted in the direction (second direction), the grain-oriented electrical steel sheets forming the first portion 110 may enter the gaps between the grain-oriented electrical steel sheets forming the second portion 120. , The grain-oriented electrical steel sheet forming the second portion 120 may enter the gap between the grain-oriented electrical steel sheets forming the first portion 110. However, when the band 140 is attached, at least a part of one end (first end) and at least a part of the other end (second end) of the third portion 130 in the longitudinal direction are each first. It comes into contact with the inner peripheral surfaces of the first portion 110 and the second portion 120. By doing so, it is possible to suppress the penetration of the above-mentioned grain-oriented electrical steel sheet.
[0047]
　As described above, in the present embodiment, of the area of ​​the window portion which is the inner region of the first portion 110 and the second portion 120, the area between the first corner portion 101 and the third corner portion 103. The length in the longitudinal direction (X-axis direction) is the same as the length in the X-axis direction at the position where the third portion 130 is arranged in the window portion so as to contact the region of the peripheral surface. The part 130 of 3 is arranged. Therefore, when the band 140 is attached, the grain-oriented electrical steel sheets forming the first portion 110 enter between the grain-oriented electrical steel sheets forming the second portion 120, and the directions forming the second portion 120. It is possible to prevent the grain-oriented electrical steel sheet from entering between the grain-oriented electrical steel sheets constituting the first portion 110. Therefore, the longitudinal end of the grain-oriented electrical steel sheet forming the first portion 110 and the longitudinal end of the grain-oriented electrical steel sheet forming the second portion 120 are in the X-axis direction (second direction). ), It is possible to prevent the abutted portion (joint portion) from deviating from a desired position. As a result, it is possible to prevent the wound iron core 100 from being deformed to form a desired shape and to prevent the iron loss from increasing.
[0048]
　In the present embodiment, when the wound iron core 100 is viewed from the plate width direction (Y-axis direction) of the grain-oriented electrical steel sheet, each corner portion (first corner portion 101 to fourth corner portion 104) has a curved shape. The case where the two bent portions having the shape of the above are provided as an example has been described. However, the number of bent portions of each corner portion may be any number as long as it is one or more. In this case, it is preferable that the total bending angle of each of the bent portions existing in one corner portion is 90 °.
[0049]
　An example of a wound iron core in the case where each corner portion has three bent portions having a curved shape will be described.
　FIG. 7 is a front view of the winding iron core 700. FIG. 7 is a diagram corresponding to FIG.
　In FIG. 7, the wound iron core 700 has a first portion 710, a second portion 720, and a third portion 730. A band is attached to the outer peripheral surface of the wound iron core 700. In FIG. 7, as in FIG. 2, for convenience of notation, the windings (coils) and bands installed on the wound iron core 700 are not shown.
　The difference between the wound core 700 shown in FIG. 7 and the wound core 100 shown in FIGS. 1 to 3 is the shape of the corner portion and the shape of the end portion in the longitudinal direction of the third portion 730 .
[0050]
　FIG. 8 is an enlarged view showing the vicinity of the first corner portion 701. FIG. 8 is a diagram corresponding to FIG. Since the shapes of the second corner portion 702, the third corner portion 703, and the fourth corner portion 704 are the same as the shape of the first corner portion 701, here, the second corner portion 702 , A detailed description of the third corner portion 703 and the fourth corner portion 704 will be omitted.
　In FIG. 7, the bent portions 701a, 701b, and 701c have a curved shape. The region between the bent portions 701a and 701b and the region between the bent portions 701b and 701c are flat portions 701d and 701e, respectively.
　As described above, one corner portion is composed of one or more bent portions. Therefore, the bent portion is continuous to the rectangular parallelepiped portion via the flat portion, and the flat portion and the bent portion are alternately continuous according to the number of the bent portions in one corner portion, and the corner portion is followed by the bent portion. In the last bent portion in the above, a rectangular parallelepiped portion adjacent to the rectangular parallelepiped portion is continuous via a flat portion with the corner portion sandwiched between them. In the example shown in FIG. 8, the bent portion 701a is continuous with the first rectangular parallelepiped portion 705 via the flat portion 701f, and the flat portion 701d, the bent portion 701b, and the flat portion 701e are continuous in this order following the bent portion 701a. , A third rectangular parallelepiped portion 707 is continuous with the bent portion 701c via the flat portion 701g. The flat portions 701f and 701g may not be provided.
[0051]
　In FIG. 8, as in FIG. 3, the region from the line segment α-α'to the line segment β-β'is designated as the first corner portion 701. In FIG. 8, the point α is an end point on the inner peripheral surface of the first corner portion 701 on the side of the first rectangular parallelepiped portion 705. The point α'is
an intersection of a straight line passing through the point α and perpendicular to the plate surface of the grain- oriented electrical steel sheet and the outer peripheral surface of the wound steel core 700 (first portion 710). Similarly, the point β is an end point on the inner peripheral surface of the first corner portion 101 on the third rectangular parallelepiped portion 707 side, and the point β'is a direction passing through the point β and perpendicular to the plate surface of the directional electromagnetic steel plate. This is the intersection of the straight line and the outer peripheral surface of the wound iron core 700 (first portion 710).
[0052]
　In FIG. 8, the angle formed by the first rectangular parallelepiped portion 705 and the third rectangular parallelepiped portion 707 that are adjacent to each other with the first corner portion 701 in between is θ (= 90 °). The total of the bending angles φ1, φ2, and φ3 of the bent portions 701a, 701b, and 701c in the first corner portion 701 (one corner portion) is 90 °. As shown in FIGS. 7 to 8, when one corner portion has three bent portions, for example, φ1 = φ2 = φ = 30 ° can be set from the viewpoint of reducing iron loss.
[0053]
　The third portion 730 is arranged in the window portion, which is an inner region of the first portion 710 and the second portion 720. Further, the plate surface of the third portion 730 is formed on the inner peripheral surface between the first corner portion 701 and the third corner portion 703 of the inner peripheral surfaces of the first portion 710 and the second portion 720. It is placed in a contact position. The length of the third portion 730 in the X-axis direction is the same as the length of the window portion in the X-axis direction at the position where the third portion 730 is arranged. That is, at least a part of the surface (end surface) of one end (first end) in the longitudinal direction of the third portion 730 is in contact with the inner peripheral surface of the first portion 710, and the third portion 730 At least a part of the surface (end surface) of the other end (second end) in the longitudinal direction is in contact with the inner peripheral surface of the second portion 720.
[0054]
　For example, in designing, as shown in FIG. 8, when viewed from the plate width direction (Y-axis direction), the first of the longitudinal ends of the directional electromagnetic steel plate constituting the third portion 730. By deciding the position of each point 701h to 701o so that the points 701h to 701o in contact with the inner peripheral surface of the corner portion 701 are located on the function representing the shape of the inner peripheral surface of the first corner portion 701. The shape of the end portion in the longitudinal direction when viewed from the plate width direction (Y-axis direction) of the third portion 730 can be matched with the shape of the inner peripheral surface of the first corner portion 701. Of the longitudinal end portions of the grain-oriented electrical steel sheet constituting the third portion 730, the end portion in contact with the inner peripheral surface of the third corner portion 703 is also the inner peripheral surface of the first corner portion 701. The shape can be determined in the same manner as the contacting ends.
[0055]
　Next, an example of a wound iron core in the case where each corner portion has one bent portion having a curved shape will be described.
　FIG. 9 is a front view of the wound iron core 900. FIG. 9 is a diagram corresponding to FIGS. 2 and 7.
　In FIG. 9, the wound iron core 900 has a first portion 910, a second portion 920, and a third portion 930. A band is attached to the outer peripheral surface of the wound iron core 900. In FIG. 9, similarly to FIGS. 2 and 7, for convenience of notation, the windings (coils) and bands installed on the wound iron core 900 are not shown.
　The difference between the wound core 900 shown in FIG. 9 and the wound core 100 shown in FIGS. 1 to 3 is the shape of the corner portion and the shape of the end portion in the longitudinal direction of the third portion 930.
[0056]
　FIG. 10 is an enlarged view showing the vicinity of the first corner portion 901. FIG. 10 is a diagram corresponding to FIGS. 3 and 8. Since the shapes of the second corner portion 902, the third corner portion 903, and the fourth corner portion 904 are the same as the shape of the first corner portion 901, here, the second corner portion 902 , A detailed description of the third corner portion 903 and the fourth corner portion 904 will be omitted.
　In FIG. 9, the bent portion 901a has a curved shape.
　As described above, one corner portion is composed of one or more bent portions. Therefore, the bent portion is continuous to the rectangular parallelepiped portion via the flat portion, and the flat portion and the bent portion are alternately continuous according to the number of the bent portions in one corner portion, and the corner portion is followed by the bent portion. In the last bent portion in the above, a rectangular parallelepiped portion adjacent to the rectangular parallelepiped portion is continuous via a flat portion with the corner portion sandwiched between them. In the example shown in FIG. 10, the bent portion 901a is continuous with the first rectangular parallelepiped portion 905 via the flat portion 901b, and the third rectangular parallelepiped portion 907 is continuous with the bent portion 901a via the flat portion 901c. The flat portions 901b and 901c may not be provided.
[0057]
　In FIG. 10, as in FIG. 3, the region from the line segment α-α'to the line segment β-β'is designated as the first corner portion 901. In FIG. 9, the point α is an end point on the inner peripheral surface of the first corner portion 901 on the side of the first rectangular parallelepiped portion 905. The point α'is
the intersection of a straight line passing through the point α and perpendicular to the plate surface of the grain -oriented electrical steel sheet and the outer peripheral surface of the wound steel core 900 (first portion 910). Similarly, the point β is an end point on the inner peripheral surface of the first corner portion 901 on the third rectangular parallelepiped portion 907 side, and the point β'passes through the point β and is perpendicular to the plate surface of the directional electromagnetic steel plate. This
is the intersection of the straight line and the outer peripheral surface of the wound iron core 900 (first portion 910).
[0058]
　In FIG. 10, the angle formed by the first rectangular parallelepiped portion 905 and the third rectangular parallelepiped portion 907 that are adjacent to each other with the first corner portion 901 in between is θ (= 90 °). The bending angle φ of the bent portion 901a in the first corner portion 901 (one corner portion) is 90 °.
　As is clear from FIGS. 3, 8 and 10, in general, when n bent portions are provided in the corner portion, φ1 + φ2 + ... + φn is 90 °.
[0059]
　The third portion 930 is arranged in a window portion which is an inner region of the first portion 910 and the second portion 920. Further, the plate surface of the third portion 930 is formed on the inner peripheral surface between the first corner portion 901 and the third corner portion 903 of the inner peripheral surfaces of the first portion 910 and the second portion 920. It is placed in a contact position. The length of the third portion 930 in the X-axis direction is the same as the length of the window portion in the X-axis direction at the position where the third portion 930 is arranged. That is, at least a part of the surface (end surface) of one end (first end) in the longitudinal direction of the third portion 930 is in contact with the inner peripheral surface of the first portion 910, and the ninth portion 930 At least a part of the surface (end surface) of the other end (second end) in the longitudinal direction is in contact with the inner peripheral surface of the second portion 920.
[0060]
　For example, in designing, as shown in FIG. 10, when viewed from the plate width direction (Y-axis direction), the first of the longitudinal ends of the directional electromagnetic steel plate constituting the third portion 930. By deciding the positions of the points 701h to 701o so that the points 901d to 901k in contact with the inner peripheral surface of the corner portion 901 are located on the function representing the shape of the inner peripheral surface of the first corner portion 901. The shape of the end portion in the longitudinal direction when viewed from the plate width direction (Y-axis direction) of the third portion 930 can be matched with the shape of the inner peripheral surface of the first corner portion 901. Of the longitudinal end portions of the grain-oriented electrical steel sheet constituting the third portion 930, the end portion in contact with the inner peripheral surface of the third corner portion 903 is also the inner peripheral surface of the first corner portion 901. The shape can be determined in the same manner as the contacting ends.

The scope of the claims
[Claim 1]
　The first corner portion and the second corner portion, the third corner portion and the fourth corner portion are arranged at intervals in the first direction, respectively, and the first
　corner portion and the said A wound iron core in which a third corner portion, the second corner portion, and the fourth corner portion are arranged at intervals in a second direction perpendicular to the first direction, respectively. there,
　a plurality each of which a plurality of soft magnetic material plate of the first corner portion and a shape bent at a position corresponding to the second corner portion, stacked as plate surfaces overlap each other A first portion having the soft magnetic material plate, and a
　plurality of soft magnetic material plates having a shape bent at positions corresponding to the third corner portion and the fourth corner portion, respectively. In 　the longitudinal direction of the soft magnetic material plate having a second portion having a plurality of soft magnetic material plates stacked so as to overlap each other and a
　third
portion, and forming the first portion. The end portion and the longitudinal end portion of the soft magnetic plate constituting the second portion are in a state of being abutted in the second direction, and the winding of the abutted portion. The position of the iron core in the circumferential direction is deviated in the second direction, and
　the end portion in the longitudinal direction of the soft magnetic material plate constituting the first portion and the soft magnetic material plate constituting the second portion. The state in which the end portions in the longitudinal direction of the above are abutted in the second direction is maintained, and
　the third portion is a window portion which is an inner region of the first portion and the second portion. Is located in
　At least a part of the region at one end of the third portion and at least a portion of the region at the other end of the third portion are, respectively, in the second direction, the inner peripheral surface of the window portion. A wound iron core characterized by being in contact with a window.
[Claim 2]
　On the surface of the third portion, a region of the first portion and the second portion in a state of being in contact with the inner peripheral surface between the first corner portion and the third corner portion is formed. However, there is no region of the first portion and the second portion in contact with the inner peripheral surface between the second corner portion and the fourth corner portion. Item 1. The wound iron core according to item 1.
[Claim 3]
　There are two
　third portions, and one surface of the third portion includes the first corner portion and the third corner portion of the first portion and the second portion. Although there is a region in contact with the inner peripheral surface between them, the first portion and the second portion come into contact with the inner peripheral surface between the third corner portion and the fourth corner portion. There is no region in the state of being made, and on
　the other surface of the third portion, between the third corner portion and the fourth corner portion of the first portion and the second portion. Although there is a region in contact with the inner peripheral surface of the above, the first portion and the second portion are in contact with the inner peripheral surface between the first corner portion and the second corner portion.
　The wound iron core according to claim 2 , wherein there is no region in a state where the two parts are in a state of being spaced apart from each other in the first direction.
[Claim 4]
　On the surface of the third portion, there is also a region of the first portion and the second portion in contact with the inner peripheral surface between the first corner portion and the second corner portion. 1. There is no region of the first portion and the second portion in contact with the inner peripheral surface between the third corner portion and the fourth corner portion. The wound iron core described in.
[Claim 5]
　The third portion is bent at a position corresponding to the first corner portion, the second corner portion, the third corner portion, and the fourth corner portion, and
　the third portion is formed. The wound iron core according to claim 1, wherein the outer peripheral surface is arranged in contact with the inner peripheral surfaces of the first portion and the second portion.
[Claim 6]
　The third portion has a plurality of soft magnetic plates stacked so that the plate surfaces overlap each other
　, and the longitudinal end portion of the soft magnetic plates constituting the third portion is the first. The
　locations where the ends of the plurality of soft magnetic plates constituting the third portion are aligned in the same layer are in a state of being butted in one direction or the second direction. The wound iron core according to claim 5, wherein the core is in one place.
[Claim 7]
　The third portion has a plurality of soft magnetic plates stacked so that the plate surfaces overlap each other
　, and the longitudinal end portion of the soft magnetic plates constituting the third portion is the first. It was abutted in the second direction at at least one position between the first corner portion and the third corner portion and the position between the second corner portion and the fourth corner portion. The position in
　the circumferential direction of the wound iron core is the position where the longitudinal ends of the plurality of soft magnetic plates constituting the third portion are abutted in the second direction. The wound core according to claim 5 or 6, characterized in that they are the same in two directions.
[Claim 8]
　The third portion has a plurality of soft magnetic plates stacked so that the plate surfaces overlap each other
　, and the longitudinal end portion of the soft magnetic plates constituting the third portion is the first. It was abutted in the first direction at at least one position between the first corner portion and the second corner portion and the position between the third corner portion and the fourth corner portion. The wound iron core according to claim 5 or 6, characterized in that it is in a state.
[Claim 9]
　The third portion has a plurality of soft magnetic plates stacked so that the plate surfaces overlap each other
　, and the longitudinal end portion of the soft magnetic plates constituting the third portion is the first. It was abutted in the first direction at at least one position between the first corner portion and the second corner portion and the position between the third corner portion and the fourth corner portion. The position in
　the circumferential direction of the wound iron core is the position where the longitudinal ends of the plurality of soft magnetic plates constituting the third portion abut in the first direction. The wound iron core according to claim 8, wherein the core is deviated in the direction of 1.
[Claim 10]
　The third portion has a plurality of soft magnetic plates stacked so that the plate surfaces overlap each other
　, and the longitudinal end portion of the soft magnetic plates constituting the third portion is the first. It was butted in the second direction only at one position, the position between the first corner portion and the third corner portion and the position between the second corner portion and the fourth corner portion. The position in
　the circumferential direction of the wound iron core is the position where the longitudinal ends of the plurality of soft magnetic plates constituting the third portion meet in the second direction. The wound iron core according to claim 5 or 6, wherein the core is deviated in the direction of.
[Claim 11]
　At positions corresponding to the first corner portion, the second corner portion, the third corner portion, and the fourth corner portion, the outer peripheral surface of the third portion and the first portion or The wound iron core according to any one of claims 5 to 10, wherein a gap is provided between the second portion and the inner peripheral surface.
[Claim 12]
　At positions corresponding to the first corner portion, the second corner portion, the third corner portion, and the fourth corner portion, the width of the gap in the thickness direction of the soft magnetic plate is determined. The wound iron core according to claim 11, which is larger than the thickness of the soft magnetic plate.
[Claim 13]
　The thickness of the first portion in the thickness direction of the soft magnetic plate at positions corresponding to the first corner portion, the second corner portion, the third corner portion, and the fourth corner portion. The wound iron core according to claim 11 or 12, wherein the following relationship is established, where a is a, the width of the gap is b, and the thickness of the third portion is c.
a + c ≧ b ≧ (a + c) / 285
[Claim 14]
　The third portion has a plurality of soft magnetic plates stacked so that the plate surfaces overlap each
　other, and at least a part of a region at one end of the soft magnetic plates constituting the third portion. And, at least a part of the other end region of the soft magnetic plate constituting the third portion is in contact with the inner peripheral surface of the window portion in the second direction, respectively. The wound iron core according to any one of claims 1 to 13, characterized in that.
Scope of amended claims (Article 19 of the Convention)
[February 10, 2020 (10.02.22020) Accepted by the International Bureau]
[1]
[After correction] The first corner portion, the second corner portion, the third corner portion, and the fourth corner portion are arranged at intervals in the first direction, respectively, and the first corner portion is
　described above. The corner portion and the third corner portion, the second corner portion and the fourth corner portion are arranged at intervals in the second direction perpendicular to the first direction, respectively. a wound iron core are,
　as each, a plurality of soft magnetic material plate of the first corner portion and a shape bent at a position corresponding to the second corner portion, overlapping the plate faces A first portion having a plurality of stacked soft magnetic material plates, and a plurality of soft magnetic material plates having
　a shape bent at positions corresponding to the third corner portion and the fourth corner portion, respectively. The soft magnetic plate having a second portion having a plurality of soft magnetic plates stacked so that the plate surfaces overlap each other and a
　third
　portion, and forming the first portion. The longitudinal end of the soft magnetic plate and the longitudinal end of the soft magnetic plate constituting the second portion are in a state of being abutted in the second direction, and the abutted portion. The position of the wound iron core in the circumferential direction is deviated in the second direction, and
　the end portion in the longitudinal direction of the soft magnetic plate constituting the first portion and the second portion constituting the first portion are formed. The state in which the longitudinal end portion of the soft magnetic plate is abutted in the second direction is maintained, and
　the third portion is a region inside the first portion and the second portion. It is placed in the window part, which is
　At least a part of the region at one end of the third portion and at least
　a portion of the region at the other end of the third portion are, respectively, in the second direction, the inner peripheral surface of the window portion. a contact state, the
　said third portion, the first corner portion, the second corner portion, the third corner portion, and bent at a position corresponding to the fourth corner portion and,
　the outer peripheral surface of said third portion, said being disposed in contact with the inner peripheral surface of the first portion and the second portion,
　said third portion, overlapping the plate faces The soft magnetic plate having the plurality of soft magnetic plates stacked as
　described above, and the end portion of the soft magnetic plate forming the third portion in the longitudinal direction is the first corner portion and the third corner portion. Only one position, the position between the two corners and the position between the second corner and the fourth corner, is in a state of being butted in the second direction, and
　the third portion is abutted. The winding is characterized in that the positions in the circumferential direction of the winding iron core at the locations where the longitudinal ends of the plurality of constituent soft magnetic plates meet in the second direction are deviated in the second direction. Iron core.
[2]
[Delete]
[3]
[Delete]
[Four]
[Delete]
[Five]
[Delete]
[6]
[After correction] The third portion has a plurality of soft magnetic plates stacked so that the plate surfaces overlap each other
　, and the end portion in the longitudinal direction of the soft magnetic plates constituting the third portion. Is in a state of being butted in the first direction or the second direction, and in the
　same layer, the longitudinal ends of the plurality of soft magnetic plates constituting the third portion are The wound iron core according to claim 1, wherein the portion to be combined is one location.
[7]
[Delete]
[8]
[Delete]
[9]
[Delete]
[Ten]
[Delete]
[11]
[After correction] At positions corresponding to the first corner portion, the second corner portion, the third corner portion, and the fourth corner portion, the outer peripheral surface of the third portion and the first The wound iron core according to claim 1 or 2, wherein a gap is provided between the portion 1 or the inner peripheral surface of the second portion.
[12]
[After correction] The gap in the thickness direction of the soft magnetic plate at a position corresponding to the first corner portion, the second corner portion, the third corner portion, and the fourth corner portion. The wound iron core according to claim 3, wherein the width of is larger than the thickness of the soft magnetic plate.
[13]
[After correction] The first corner portion in the thickness direction of the soft magnetic material plate at a position corresponding to the first corner portion, the second corner portion, the third corner portion, and the fourth corner portion. The wound iron core according to claim 3 or 4, wherein the following relationship is established, where a is the thickness of the portion, b is the width of the gap, and c is the thickness of the third portion.
a + c ≧ b ≧ (a + c) / 285
[14]
[After correction] The third portion has a plurality of soft magnetic plates stacked so that the plate surfaces overlap each
　other, and a region of one end of the soft magnetic plates constituting the third portion. At least a part of the above and at least a part of the other end region of the soft magnetic plate constituting the third part are in contact with the inner peripheral surface of the window portion in the second direction, respectively. The wound iron core according to any one of claims 1 to 5, wherein the wound iron core is in a state of being in a state of being

Instructions based on Article 19 (1) of the Convention
1. 1. Details of Amendment
　　　Claim 1 was amended, and claims 2 to 5 and claims 7 to 10 were deleted. In addition, claims 6, 11 to 14 have been amended.

2. 2. Explanation
　　　Claims 10 and 5 which have a structure not found in the cited document and claim 5 to which claim 10 depends are added to claim 1, and claims 5 and 10 are deleted. In addition, claims 2 to 4 and 7 to 9 have been deleted. Claims 6, 11 to 14 have been amended due to the change in the dependency relationship due to the deletion of the above claim.