JP2021027115A - Laminated iron core stationary induction device and manufacturing method of the same - Google Patents

Abstract

To provide a laminated iron core of a strip type that is easy to manufacture, with efficiency higher than before and a laminated iron core stationary induction device.SOLUTION: A laminated iron core stationary induction device has a laminated iron core consisting of strips of magnetic members butt-jointed and laminated together. A laminated iron core consists of a plurality of iron core blocks 10, in which a plurality of strip-shaped magnetic body members are arranged in the width direction with their end positions shifted in the length direction, butted so that butt portions of both iron core blocks form a staircase shape by arranging them so that the ends of the plurality of magnetic material members in the shape of strips of one iron core block body 10 are located on the sides of the plurality of magnetic material members in the shape of strips of the other iron core block body 10.SELECTED DRAWING: Figure 1

Description

The present invention relates to a product core stationary induction device having a product core and a method for manufacturing the same.

As a static induction device such as a transformer, there is a static induction device for a steel core in which a block body in which amorphous thin bands are laminated or an electromagnetic steel plate is stacked to form an iron core composed of a leg portion and a yoke portion.

Patent Document 1 (Japanese Unexamined Patent Publication No. 11-186082) states that "a unit polymer is formed by cutting a strip polymer composed of a stack of strips of a plurality of amorphous magnetic alloy foils to a predetermined length. A laminated block of unit polymers is formed by stacking unit polymers that are sequentially formed by shifting their positions in the length direction. The unit polymers constituting the laminated block are taken in order from the top and used as a workbench. By stacking on top of each other, the legs and joints of the iron core are formed. "(See summary).

Japanese Unexamined Patent Publication No. 11-186082

There are a frame type and a strip type as the iron core structure of the product core transformer. In the frame type, as the magnetic material of the leg portion and the yoke portion, a material having an oblique end face shape such as a trapezoidal shape is used, and the oblique end faces are connected to each other to form a steel core. In the frame type, the static induction device after assembly is more efficient than the strip type, but it is necessary to cut the magnetic material diagonally, which complicates cutting and assembling and increases the manufacturing process. On the other hand, in the strip type, a rectangular parallelepiped strip-shaped magnetic material is used as the magnetic material of the leg portion and the yoke portion to form the iron core. Compared to the frame type manufacturing process, the strip type is easier to cut the magnetic material and requires less manufacturing process.

Patent Document 1 discloses a method for producing an amorphous iron core with improved work efficiency by making it possible to easily form a unit polymer composed of a polymer of a ribbon of an amorphous magnetic alloy foil. Only the efficiency of the manufacturing method is considered, not the efficiency of the transformer or static induction equipment after assembly.

An object of the present invention is to provide a strip-shaped, easy-to-manufacture strip-shaped iron core and a static induction device for the iron core, which are more efficient than before.

To give an example of the "stationary iron core stationary induction device" of the present invention for solving the above-mentioned problems, it is a stationary iron core stationary guiding device having a stacked iron core in which strip-shaped magnetic members are butted against each other. A plurality of iron core block bodies in which a plurality of magnetic members having a shape are arranged in the width direction with the positions of the ends shifted in the length direction are arranged, and the ends of the strip-shaped magnetic members of one of the iron core blocks are arranged. , The other iron core block body is arranged so as to be located on the side surface of a plurality of strip-shaped magnetic member members, and the butted portions of both iron core block bodies are butted so as to form a stepped shape to form a stacked iron core. ..

Further, to give an example of the "method for manufacturing a stationary iron core stationary induction device" of the present invention,
This is a method for manufacturing a steel stack static induction device having a stack of iron cores in which strip-shaped magnetic members are butted against each other, and a plurality of strip-shaped magnetic members are displaced in the length direction in the width direction. A step of creating an iron core block body by joining to, and a plurality of the iron core block bodies, and a plurality of strip-shaped magnetic member members of one iron core block body having a plurality of strip-shaped members of the other iron core block body. It is provided with a step of arranging the two iron core blocks so as to be located on the side surface of the magnetic member of the above and abutting the butt portions of the two iron core blocks so as to form a stepped iron core.

According to the present invention, it is possible to provide a strip-shaped, easy-to-manufacture strip-shaped iron core and a static induction device for the iron core, which are more efficient than before.

Issues, configurations and effects other than those mentioned above will be clarified by the description of the following examples.

It is a front view of the iron core of a single-phase transformer which concerns on Example 1 of this invention. It is a figure which shows one iron core block body of the product iron core which concerns on Example 1. FIG. It is a figure which shows the structure and the magnetic flux density distribution of the strip type iron core end portion of this invention. It is a figure which shows the end structure and the magnetic flux density distribution of a frame type iron core. It is a figure which shows the end structure and the magnetic flux density distribution of a strip type iron core. It is a figure which shows the relationship between the gap width and the average magnetic flux density of this invention, a conventional frame type and a strip type. It is a figure corresponding to the claim regarding Example 1. It is a figure which shows an example of the product iron core which was composed of the three-layer three-leg type which concerns on Example 2. FIG. It is a figure which shows the conventional frame type iron core and strip type iron core. It is a figure explaining the production of the wide amorphous strip.

Prior to the description of the embodiment of the present invention, a conventional single-phase product core transformer will be described. 9A and 9B show a conventional product core type, FIG. 9A shows a frame type iron core, and FIG. 9B shows a strip type iron core.

The frame-type product core 40 of FIG. 9A uses a magnetic material member having an oblique end face shape such as a trapezoidal shape for the leg portion 5 and the yoke portion 6, and connects the oblique end faces to each other to form a frame shape. Consists of a steel core. Although not clearly shown in the figure, the position of the gap, which is the abutment portion between the leg portion 5 and the yoke portion 6, is provided so as to be staggered between the laminated upper layer and the lower layer, thereby improving the flow of magnetic flux between the upper and lower layers and improving efficiency. It may be changed. A coil 7 is wound around the leg portion 5. The frame type has higher efficiency in iron core characteristics than the strip type, but it is necessary to cut the magnetic material member diagonally, which makes cutting the magnetic material and assembling the steel core. The iron core member having a region around which the coil is wound is referred to as a leg portion 5, and the iron core member having no region around which the coil is wound is referred to as a yoke portion 6.

In the strip-shaped product core 50 of FIG. 9B, a rectangular parallelepiped strip-shaped magnetic member is used for the legs 5 and the yoke 6, and the ends of the strips are butted against the sides of the other strips. Arrange to form a rectangular parallelepiped steel core. Although not clearly shown in the figure, the abutting portion between the leg portion 5 and the yoke portion 6 is made different between the laminated upper layer and the lower layer to improve the flow of magnetic flux between the upper and lower layers and improve efficiency. .. The strip type is easy to manufacture because it uses a strip-shaped magnetic member, but its efficiency is lower than that of the frame type.

As an iron core material for a transformer or the like, an amorphous strip having good characteristics and a small thickness is used instead of an electromagnetic steel sheet. It is suitable because the thickness is small and the eddy current is also small. Transformers using amorphous strips in the current market are of the winding iron core type, and in order to be used for large transformers, it is necessary to use the product core type. As shown in FIG. 10A, the width of the amorphous strip is determined by the standard, but there is no wide one suitable for a large transformer as compared with the electromagnetic steel plate. Further, the amorphous strip is manufactured by pouring a heated and melted member into a low-temperature roller and spreading it, and it is generally difficult to manufacture a wide amorphous strip due to the manufacturing principle thereof. Therefore, in order to increase the width, as shown in FIG. 10B, it is necessary to partially overlap the two amorphous strips and join them at the joint. As shown in FIG. 10C, in order to use the wide amorphous ribbon for the frame type iron core, it is necessary to cut the amorphous ribbon diagonally. However, diagonal cutting requires a corresponding wide cutting blade, and the wider the amorphous strip, the larger the cutting blade, which increases the cost. Further, since the amorphous strip is harder than the electromagnetic steel sheet, it is difficult to cut a wide amorphous material. It should be noted that there is a similar problem not only in the transformer using the amorphous strip but also in the case of using the electromagnetic steel plate.

The present invention provides a strip-shaped, easy-to-manufacture, efficient core transformer.
Hereinafter, examples of the present invention will be described with reference to the drawings. In addition, in each figure for demonstrating an embodiment, the same constituent elements are given the same name and reference numeral as much as possible, and the repeated description thereof will be omitted.

The first embodiment will be described with reference to FIGS. 1 to 7. FIG. 1 shows the iron core used in the single-phase stationary induction device of the first embodiment of the present invention, and FIG. 1 (a) shows one layer (for example, the upper layer) 1a of the upper and lower two layers of the iron core. 1 (b) shows the other layer (for example, the lower layer) 1b of the upper and lower two layers. Further, FIG. 2 shows one iron core block body 10 constituting the product core of FIG. 1.

In FIG. 2, the iron core block body 10 has a rectangular parallelepiped-shaped (strip-shaped) first magnetic material member 11 and a rectangular parallelepiped-shaped (strip-shaped) second magnetic material having a length shorter than that of the first magnetic material member. It has a member 12. Then, the ends of the second magnetic member 12 are shifted in the length direction so as to be inward (toward the center) of the ends of the first magnetic member 11 on both sides, and the first The magnetic member 11 and the second magnetic member 12 are arranged side by side. Then, the two are joined at the joint portion 13 to form the iron core block body 10. That is, in the iron core block body 10, the first magnetic material member 11 and the second magnetic material member 12 are formed in a convex shape. The joining method is not limited, but if the joining method does not cause a thickness at the joint, the space factor of the iron core can be improved because the joint does not have a thickness. In addition, since the joint portion is not thick, misalignment is less likely to occur in the process of stacking the iron core block bodies 10, and productivity is improved.

The position of the short side of the second magnetic member 12 of the iron core block body 10 may be arranged so as to be separated from the short side of the first magnetic member 11 by the width of the first magnetic member 11. By arranging the first magnetic member 11 with a gap in width, the iron core block bodies 10 can be arranged so as to be staggered with each other. Further, the positions of the other short sides of the second magnetic member 12 may be similarly opened. As a result, as shown in FIG. 1, the iron core block 10 can be arranged in the plane direction so that the gap becomes small.

The material of the first magnetic material member 11 and the second magnetic material member 12 may be an amorphous alloy foil piece or an electromagnetic steel plate. In the present specification, the terms amorphous strip, amorphous alloy foil piece, amorphous alloy strip, etc. are referred to, but all of them refer to the amorphous strip. Further, it can be carried out with a clad material in which an amorphous foil piece and an electromagnetic steel sheet or a nanocrystal foil are laminated, or a thin band of a nanocrystal foil alone. The amorphous foil piece is thinner than the thickness of the electromagnetic steel sheet, and is about one tenth the thickness of the electromagnetic steel sheet. Therefore, it can be handled in the same manner as an electromagnetic steel sheet by stacking a plurality of amorphous foil pieces joined in the width direction to form an iron core block body 10. The iron core block body 10 formed by joining the first magnetic material member 11 and the second magnetic material member 12 of the amorphous thin band can be laminated alternately to improve the characteristics of the iron core. Further, when about 10 to 20 pieces of the joined pieces are stacked to form the iron core block body 10, the productivity can be improved because each of the iron core block bodies 10 can be laminated at the time of manufacturing.

FIG. 1 shows an example of a steel core of a single-phase transformer. In the upper layer of FIG. 1A and the lower layer of FIG. 1B, four iron core block bodies 10 shown in FIG. 2 are combined to form a stacked iron core. Then, at the four abutting portions of the iron core block body, the end portions of the strip-shaped first magnetic material member and the second magnetic body member of one iron core block body are the strip-shaped first magnetic member of the other iron core block body. It is arranged so as to be located on the side surface of the magnetic material member 1 and the magnetic material member 2, and the butt portions of both iron core blocks are butted so as to be stepped (stepped portion 15) to form a stacked iron core. There is. The positional relationship of the iron core block bodies 10 arranged on the same plane with respect to the stepped portion 15 will be described. Note that the term "on the same plane" does not mean exactly the same plane, but indicates the positional relationship between the iron core block bodies 10 which are the same layer when assembled as an iron core. That is, it is not necessary for the surfaces to form the same plane, and the layers may be the same. The long side of the first magnetic member 11 of the first block body 10 faces the short side of the first magnetic member 11 of the second block body 10, and the second magnetic body 12 of the first block body 10 The short side of the second iron core block body 10 faces the long side of the first magnetic body 11 of the second iron core block body 10, and the long side of the second magnetic body 12 of the first iron core block body 10 faces the long side of the second iron core block body 10. It is arranged so as to face the short side of the second magnetic body 12. Arranged so as to face each other means that the two members are arranged so as to have an area facing each other.

Further, in the other stepped portion 15, the short side of the first magnetic member 11 of the first block body 10 faces the long side of the first magnetic member 11 of the third block body 10, and the first The long side of the first magnetic body 11 of the block body 10 faces the short side of the second magnetic body 12 of the third iron core block body 10, and the short side of the second magnetic body 12 of the first iron core block body 10 The sides are arranged so as to face the long sides of the second magnetic body 12 of the third iron core block body 10. This opposite part may be in contact.

The arrangement of the iron core block body 10 is different between the upper layer and the lower layer. For example, in the upper left corner of the stacked iron core, the first magnetic body member of the iron core block body constituting the yoke portion 6 in the upper layer of FIG. 1 (a). Is arranged, and in the lower layer of FIG. 1B, the first magnetic material member of the iron core block body constituting the leg portion 5 is arranged. The upper layer and the lower layer are stacked as a pair, and a large number of these pairs are further stacked to form a stacked iron core. Since a gap is formed in the butt portion of the iron core block body, it is difficult for magnetic flux to flow, but by making the position of the stepped portion 15 different between the upper layer and the lower layer, the magnetic flux easily flows between the upper and lower layers.

The relationship in which the iron core block bodies 10 are alternately stacked between the yoke portions of the upper layer and the lower layer or between the legs is a part of the first magnetic body 11 of the first iron core block body 10 of the lower layer and the second of the upper layer. A part of the first magnetic body 11 of the iron core block body 10 overlaps, and a part of the second magnetic body 12 of the first iron core block body 10 in the lower layer and the second part of the second iron core block body 10 in the upper layer Part of the magnetic material 12 overlaps. In other words, the end of the lower layer first core block body 10 in the first direction does not overlap with the block body 10 of the second core, and the end of the second core block body 10 in the second direction is It is a relationship that does not overlap with the first iron core block body 10.

Further, the relationship in which the iron core block bodies 10 are alternately stacked on the upper layer, the lower layer yoke portion, and the leg portion is the same as the end portion of the first magnetic body 11 of the lower layer first iron core block body 10 in the first direction. The ends of the first magnetic body 11 of the second iron core block body 10 in the upper layer overlap with each other in the first direction, and the ends of the second magnetic body 12 of the first iron core block body 10 in the lower layer overlap with each other in the first direction. The end portion and the end portion of the second magnetic body 12 of the second iron core block body 10 in the upper layer in the first direction overlap with each other. In other words, the end of the first iron core block body 10 in the lower layer in the first direction and the end in the first direction of the second iron core block body 10 in the upper layer overlap each other, and the first iron core block body in the lower layer The end of the 10 in the second direction and the end of the upper layer of the second iron core block body 10 in the second direction do not overlap each other.

FIG. 3 shows a diagram simulating the magnetic flux density distribution in the end configuration of the iron core of this embodiment. In the figure, 10 pieces of amorphous foil pieces are used as one layer, and the magnetic flux density of two layers is calculated by the finite element method. The gap width of the butt portion is 1.2 mm. FIG. 3A shows the upper layer, FIG. 3B shows the lower layer, and FIG. 3C shows the magnetic flux density distribution when two layers are stacked. In the figure, the light-colored portion shows the low magnetic flux density. The dark part indicates that the magnetic flux density is high. The dark part is the part that is grayscale and close to black.

In FIGS. 3A and 3B, the region of insufficient magnetization at the tip of the overlapping portion indicated by the arrow is smaller than that of the strip type described later, and the excitation efficiency is improved. Further, in the case of the two layers shown in FIG. 3C, the non-operating area can be reduced and the iron core magnetic flux density can be increased by combining the strip end positions with each other. When the left exciting coil is excited (20 turns, 1A), the average magnetic flux density in the cross section 55 mm from the right exciting coil (observation point) is 1.4 Tesla, which is higher than the strip type. It is improving.

FIG. 4 shows the magnetic flux density distribution of the frame type iron core obtained by performing the same calculation as in FIG. As shown in FIGS. 4A and 4B, in the frame type iron core, the tip of the overlapping portion indicated by the arrow is sufficiently magnetized, and the excitation efficiency is improved. Further, as shown in FIG. 4 (c), the average magnetic flux density in the cross section at the position (observation point) 55 mm from the right exciting coil is 1.5 Tesla, and the exciting efficiency is improved.

FIG. 5 shows the magnetic flux density distribution of the strip-shaped iron core, which was calculated in the same manner as in FIG. As shown in FIGS. 5A and 5B, in the strip-shaped iron core, the magnetization of the tip of the overlapping portion indicated by the arrow is insufficient, and the excitation efficiency is deteriorated. Further, as shown in FIG. 5C, the average magnetic flux density in the cross section 55 mm from the right exciting coil (observation point) is 1.2 Tesla, and the exciting efficiency is poor.

As can be seen from the comparison of FIGS. 3 to 5, according to this embodiment, the non-operating area of the iron core is reduced by combining the strip end positions with each other, although the strip type is easy to manufacture. The magnetic flux density can be increased and the average magnetic flux density can be improved.

FIG. 6 shows a comparison of the relationship between the gap width and the average magnetic flux density of the stacked iron core of this embodiment and the frame type iron core and the strip type iron core. As shown in the figure, in the strip type, the average magnetic flux density decreases from a gap width of about 0.5 mm, whereas according to this embodiment, the average magnetic flux density is constant up to a gap width of about 1.5 mm. According to this embodiment, although it is a strip type that is easy to manufacture, an excitation efficiency close to that of a frame type is obtained.

FIG. 7 shows a diagram corresponding to the claims relating to the first embodiment.
In an iron core stationary induction device having an iron core in which magnetic members are laminated and the iron core blocks 30 and 35 are butted against each other, the first magnetic member 31 and the first magnetic material in the short side direction of the iron core block 30 The second magnetic member 32, which is shorter than the member 31, is arranged, and the sides where the first magnetic member 31 and the second magnetic member 32 face each other are joined, and the second magnetic member 32 is joined. The end face in the long side direction of the first magnetic member 31 is arranged inside the end face in the long side direction, and the second magnetic member 32 of the first iron core block body 30 is the second magnetic member 32. The iron core block body 35 has a region that is abutted with or faces the first magnetic material member 36 and the second magnetic material member 37.

According to this embodiment, it is possible to provide a strip type, which is easy to manufacture, and an efficient core transformer. Further, by changing the position of the abutting portion of the iron core block body in the upper and lower layers, the flow of magnetic flux can be improved and efficiency can be improved.

Further, in the present embodiment, since the stacked iron core is formed by combining the convex-shaped iron core block body obtained by joining the first magnetic material member and the second magnetic material member, the production becomes easy.

FIG. 8 shows the iron core of Example 2 of the present invention, FIG. 8 (a) shows the upper layer 100a of the upper and lower two layers of the iron core, and FIG. 8 (b) shows the upper and lower two layers. The lower layer 100b inside is shown. The second embodiment is used for a three-phase three-legged transformer.

As shown in the figure, the majority of the iron cores are composed of the iron core block body 10 shown in FIG. 2, but the iron core block body 20 of the central leg and a part of the iron core block body 25 of the yoke portion are different. It is composed of shapes. It is the same as in Example 1 in that the upper layer and the lower layer are stacked as a pair, and a large number of these pairs are stacked to form a stacked iron core.

According to this embodiment, in a three-phase three-legged iron core, by combining three types of iron core blocks, a product core that is easy to manufacture and highly efficient can be constructed.

It should be noted that various configurations are conceivable as the configuration of the iron core block body in which the strip-shaped first magnetic member 11 and the strip-shaped second magnetic member 12 are joined in the width direction. Further, in Examples 1 and 2, the iron core block body is formed of two magnetic material members in the width direction, but the iron core block body may be formed by joining three or more magnetic material members in the width direction.

Further, in Examples 1 and 2, the magnetic members are joined in the width direction, but a plurality of magnetic members may be arranged side by side in the width direction without joining in the width direction. That is, a plurality of iron core block bodies in which a plurality of strip-shaped magnetic members are arranged in the width direction with their ends shifted in the length direction, and a plurality of strip-shaped magnetic members of one iron core block body. The ends are arranged so as to be located on the side surfaces of a plurality of strip-shaped magnetic members of the other iron core block body, and the abutting portions of both iron core block bodies are butted so as to form a stepped shape to form a stacked iron core. Anything is fine.

In each of the above examples, an example in which the present invention is used for a stacked transformer has been described, but the present invention can be used for a stationary induction device including a reactor.

1 ... Iron core 1a Upper layer of iron core 1b ... Lower layer of iron core 5 ... Leg 6 ... York part (joint iron part)
7 ... Coil 10 ... Iron core block body 11 ... First magnetic material member 12 ... Second magnetic material member 13 ... Joint portion 15 ... Stepped portion 20 ... Iron core block body 25 of central leg ... Part of yoke portion Iron core block body 30 ... First iron core block body 31 ... First magnetic material member 32 ... Second magnetic material member 35 ... Second iron core block body 36 ... First magnetic material member 37 ... Second magnetic material Member 39 ... Stepped portion 40 ... Frame type iron core 50 ... Strip type iron core 100a ... 3-phase 3-legged iron core upper layer 100b ... 3-phase 3-leg type iron core lower layer

Claims (14)

It is a product core static induction device having a product core in which strip-shaped magnetic members are butted and laminated.
A plurality of iron core block bodies in which a plurality of strip-shaped magnetic members are arranged in the width direction with their ends shifted in the length direction, and a plurality of strip-shaped magnetic members of one iron core block body are arranged at the ends. However, it was arranged so as to be located on the side surface of a plurality of strip-shaped magnetic members of the other iron core block body, and the butted portions of both iron core block bodies were butted so as to form a stepped shape to form a stacked iron core. A featured iron core stationary induction device. In the product iron core stationary induction device according to claim 1,
The iron core block body is a product core stationary induction device characterized in that the plurality of magnetic members are joined in the width direction. In the product iron core stationary induction device according to claim 1,
A plurality of iron core block bodies in which a strip-shaped first magnetic material member and a strip-shaped second magnetic material member are joined in the width direction by shifting the position of the end in the length direction, and one iron core block body. The ends of the strip-shaped first magnetic member and the second magnetic member are located on the side surfaces of the strip-shaped first magnetic member and the second magnetic member of the other iron core block body. An iron core stationary induction device characterized in that the butt portions of both iron core blocks are butted so as to form a stepped shape to form a stacked iron core. In the product iron core stationary induction device according to claim 1,
At the abutment of the two iron core blocks
The first layer is arranged so that the ends of the strip-shaped magnetic members of one iron core block body are located on the side surfaces of the strip-shaped magnetic members of the other iron core block body.
In the second layer overlapping the first layer, the ends of the strip-shaped magnetic members of the other iron core block are located on the side surfaces of the strip-shaped magnetic members of the one iron block. Arrange as
A product iron core stationary induction device characterized in that magnetic flux flows between a plurality of magnetic members in different layers. In the product iron core stationary induction device according to claim 1,
The magnetic material member is a product iron core stationary induction device, characterized in that it is an amorphous magnetic member. In the product iron core stationary induction device according to claim 1,
The magnetic material member is a product core static induction device characterized in that it is an electromagnetic steel plate. In the product iron core stationary induction device according to claim 1,
The magnetic material member is a clad material obtained by laminating an amorphous magnetic member and an electromagnetic steel plate or a nanocrystal foil. In the product iron core stationary induction device according to claim 1,
The product core is a static induction device for a product core, which is a single-phase type having two legs. In the product iron core stationary induction device according to claim 1,
The product core is a three-phase three-leg type having three legs, and is a product core stationary induction device. In a stationary induction device having a product core in which magnetic members are laminated and iron core blocks are butted against each other.
The first magnetic material member and the second magnetic material member shorter than the first magnetic material member are arranged in the short side direction of the iron core block body, and the first magnetic material member and the second magnetic material are arranged. The sides where the members face each other are joined,
The end face in the long side direction of the second magnetic member is arranged inside the end face in the long side direction of the first magnetic member.
The second magnetic member of the first iron core block body has a region abutting or facing the first magnetic member and the second magnetic member of the second iron core block body. A featured stationary guidance device. In the stationary induction device according to claim 10,
A stationary induction device characterized in that the magnetic member is an amorphous magnetic member. It is a method for manufacturing a product core static induction device having a product core in which strip-shaped magnetic members are butted and laminated.
A step of creating an iron core block body by joining a plurality of strip-shaped magnetic members in the width direction by shifting the positions of the ends in the length direction.
The plurality of iron core blocks are arranged so that the ends of the strip-shaped magnetic members of one iron core block are located on the side surfaces of the strip-shaped magnetic members of the other iron core block. Then, the step of forming the stacked iron core by abutting the abutment portions of both iron core blocks so as to form a step, and
A method for manufacturing a static induction device for a product iron core. In the method for manufacturing a product iron core stationary induction device according to claim 12,
The step of forming the stacked iron core is performed at the abutting portion of the two iron core blocks.
The first layer is created by arranging the ends of the strip-shaped magnetic members of one iron core block body so as to be located on the side surfaces of the strip-shaped magnetic members of the other iron core block body. Steps and
A second layer in which the ends of the strip-shaped magnetic members of the other iron core block are arranged so as to be located on the side surfaces of the strip-shaped magnetic members of the one iron block and overlap the first layer. With the steps to create two layers,
A method for manufacturing a product core static induction device, which comprises repeating a step of creating a first layer and a step of creating a second layer to form a product core. In the method for manufacturing a product iron core stationary induction device according to claim 12,
The step of creating the iron core block body is to join a plurality of strip-shaped amorphous strips in the width direction by shifting the positions of the ends in the length direction, and stack a plurality of the joined amorphous strips. A method for manufacturing a static induction device for a steel core.

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