JP7232133B2 - Stacked iron core static induction device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a stacked core static induction device having a stacked core.

As a static induction device such as a transformer, there is a laminated core type static induction device in which an iron core is constructed by stacking blocks or electromagnetic steel plates laminated with amorphous ribbons.

Patent Document 1 (Japanese Patent Application Laid-Open No. 2018-56336) describes "a laminated body in which a plurality of plate-shaped ribbons made of a soft magnetic material are laminated, and the plate-shaped ribbon is an outer edge of the ribbon. A composite multi-core magnetic core in which a laminated body in which a slit extending from a part to an inner surface is formed is arranged as at least a part of an annular magnetic path in a state where the laminated end surfaces are butted against each other." (Claim 1, 8 reference) is stated.

JP 2018-56336 A

The iron core of a transformer is subjected to heat treatment in a magnetic field by heating while applying a magnetic field to form anisotropy in the magnetic domain of the iron core, and it is required to have an appropriate magnetic anisotropy.

Patent Document 1 discloses a composite magnetic core having a laminated body in which slits are formed in a plate-shaped ribbon from the outer end of the ribbon to the inner surface of the ribbon, and the plate-shaped ribbons are laminated. The laminate of Document 1 flattens wrinkles and, as a result, provides a laminate with a good space factor, but does not consider magnetic anisotropy.

An object of the present invention is to improve the magnetic anisotropy of the iron core and to provide a transformer with small magnetic loss.

To give an example of the "laminated iron core type stationary induction device" of the present invention for solving the above-mentioned problems, it has a laminated iron core composed of a block body in which amorphous ribbons are laminated or a leg part and a yoke part in which steel plates are combined. A laminated iron core type stationary induction device, wherein the amorphous ribbon or the steel plate is provided with a plurality of parallel first slits extending in a longitudinal direction, the laminated iron core is a frame iron core, It is characterized by having a second slit inclined from the axial direction of the leg or yoke toward the connected yoke or leg in the vicinity of the contact point between the leg and yoke.

ADVANTAGE OF THE INVENTION According to this invention, the magnetic anisotropy of an iron core can be improved and the transformer with small magnetic loss can be provided by providing a slit in an iron core.

Problems, configurations and effects other than those described above will be clarified by the following description of the embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a stacked core transformer configured as a three-phase stacked core type transformer according to Example 1 of the present invention; FIG. 4 is an enlarged view of the vicinity of a contact point between a leg of a laminated core and a yoke according to Example 1; FIG. 10 is a front view of a laminated iron core configured by a block body in which a plurality of amorphous ribbons are laminated according to Example 2; FIG. 8 is a cross-sectional view of a laminated iron core configured by a block body in which a plurality of amorphous ribbons are laminated according to Example 2; FIG. 11 is a front view of a core having legs and yokes formed of rectangular parallelepipeds according to Example 3; FIG. 11 is a front view of a core having legs and yokes formed of rectangular parallelepipeds according to Example 4; FIG. 11 is a front view of a single-phase stacked core type transformer according to a fifth embodiment;

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in each drawing for explaining the embodiments, the same components are given the same names and symbols as much as possible, and the repeated description thereof is omitted.

A stacked core transformer of Example 1 will be described with reference to FIGS. 1 and 2. FIG.
FIG. 1 is a front view of a core-stacked transformer in which a large number of steel plates with a thickness of 0.5 mm or less are stacked flat to form a three-phase core transformer. The three-stack core has a coil 7 wound around each of three legs 5, and the legs 5 are connected by a yoke 6 to form a magnetic circuit. The core shown in FIG. 1 is commonly called a frame core, and in order to improve the flow of the magnetic circuit, the steel plates of the legs 5 and the yoke 6 are formed in a trapezoidal or parallelogram shape instead of a rectangular parallelepiped shape. are used to connect the oblique end surfaces.

In this embodiment, as shown in FIG. 1, slits 2, 3, and 4 are provided in the steel plate forming the frame iron core to further improve the flow of the magnetic circuit and reduce the magnetic loss. . The slit 2 (first slit) is provided to improve the flow of the magnetic circuit, to make the direction of magnetic flux flow anisotropic, or to strengthen the anisotropy. A plurality of slits 2 are provided in the leg 5 and the yoke 6 in parallel in the longitudinal direction. The slit 2 is provided in a region inside the outer edge of the leg 5 or the yoke 6 . A slit 3 (second slit) is provided in the vicinity of the contact point between the leg 5 and the yoke 6 so as to be inclined with respect to the axial direction. The slit 3, like the slit 2, enhances the anisotropy in the in-plane direction oriented along the magnetic circuit. The slit 4 (third slit) is provided at the end of the leg 5 and the yoke 6 in parallel with the end face, and is directed in the out-of-plane direction ( It works to strengthen the anisotropy in the direction perpendicular to the plane.

FIG. 2 shows an enlarged view of the vicinity of the contact point between the leg 5 and the yoke 6 at the end.
In a frame core, many strips of steel plates are stacked to form a stacked core. Stacked in a staggered position. This maintains the flow of the magnetic circuit while suppressing swelling in the stacking direction. FIG. 2 shows an example of forming a unit in which the leg 5 and the yoke 6 are overlapped with two upper and lower layers. A slit 2, a slit 3 and a slit 4 are formed in the steel plate forming the leg 5 and the yoke 6. - 特許庁In the figure, the leg 5a is the upper layer, the leg 5b is the lower layer, the yoke 6a is the upper layer, and the yoke 6b is the lower layer. The leg 5b and the yoke 6b are butted in the lower layer. In practice, several hundred to several thousand steel plates are laminated, so the structure is such that a large number of two-layer unit structures are stacked one above the other. In FIG. 2, two layers constitute a lamination unit, but three or more layers may constitute a lamination unit.

A slit 2, a slit 3 and a slit 4 are formed in the steel plate forming the leg 5 and the yoke 6. - 特許庁As shown in FIG. 1, a plurality of slits 2 (first slits) are provided parallel to each other in the longitudinal direction of the leg 5 or the yoke 6 except for the ends thereof. As shown in FIGS. 1 and 2, the slit 3 (second slit) is formed at an angle toward the connecting end of the leg 5 and the yoke 6 so as to improve the flow of the magnetic circuit. It is what I did. The slit 4 (third slit) is formed at the end of the leg 5 or the yoke 6 parallel to the end so as to strengthen the magnetic anisotropy in the out-of-plane direction (perpendicular to the plane). be.

The flow of magnetic flux according to this embodiment will be described. In FIG. 2, the magnetic circuit shows the magnetic flux flowing from the leg 5 to the yoke 6 in the direction of the arrow.
Slits 5a-2 and 5a-3 are provided in the leg 5a of the upper layer, and slits 5b-2 and 5b-3 are provided in the leg 5b of the lower layer. Since the slits 5a-2 and 5b-2 are provided, the magnetic flux density of the steel plate of the leg 5 has strong magnetic anisotropy in the longitudinal direction. In the figure, since the direction of the magnetic flux flowing through each steel plate of the leg 5 is from bottom to top, the basic direction in which the slits 2 are formed is the vertically elongated shape shown in the figure for each steel plate.
The width of the slit 2 (first slit) should be narrow so that the flow of the magnetic flux is not hindered and the magnetic performance is not degraded. , preferably 5% or less. On the other hand, in order to insert the slit 2 and strengthen the magnetic anisotropy, it is desirable to insert at least two parallel lines. In the drawing, the number of parallel slit lines is three, but the magnetic anisotropy can be strengthened by forming a plurality of lines.

The slit 3 of the leg 5 and the slit 3 of the yoke 6 are placed obliquely with respect to the longitudinal direction of the steel plate near the contact points of the ends of the leg 5 and the yoke 6 . The reason for this is to prevent the direction of the flow of the magnetic circuit from changing from the leg 5 to the yoke 6 abruptly. Therefore, the direction of the slit is gradually changed (from the axial direction of the leg 5 toward the axial direction of the yoke 6) as it approaches the vicinity of the contact point between the leg 5 and the yoke 6, thereby obstructing the flow of the magnetic circuit. This is to prevent In the figure, the magnetic flux of the leg 5 flows from bottom to top, and when approaching the contact point between the leg 5 and the yoke 6, the slit 3 near the contact point is tilted about 30 degrees to the right in order to facilitate the flow toward the yoke 6 side. In the drawing, there is one type of slit 3 inclined with respect to the axial direction of the leg 5 , but two or more types of slits with different inclinations may be gradually formed in the axial direction of the yoke 6 .
Similarly, slits 6a-3 and 6b-3 near the contacts of the yoke 6 are formed in each steel plate at an angle of about 30 degrees to the left. The slit 2 of the yoke 6, which is not in the vicinity of the contact point, is elongated laterally in the longitudinal direction as shown in the figure.

The slits 4 at the ends of the leg 5 and the yoke 6 are formed parallel to the obliquely cut steel plate end face in order to facilitate the formation of a magnetic circuit in the out-of-plane direction, that is, in the direction perpendicular to the plane of the leg 5 or the yoke 6. I'm putting The reason for this is that, in order to reduce the magnetic loss at the end face of the oblique cut, a slit 4 is formed in front of the oblique cut in parallel with the oblique cut to facilitate the flow of magnetic flux through the upper and lower steel plates near the contact.

The magnetic flux flowing through the leg 5a is slightly changed in direction by the slit 5a-3 near the contact point so as to easily follow the lateral flow on the side of the yoke 6, and is blocked by the slit 5a-4. It becomes easier to flow to the contacting yoke 6b or the yoke 6 (not shown) on the opposite side. Then, the magnetic flux flowing through the lower yoke 6b near the contact is changed in direction by the oblique slit 6b-3, and further regulated by the horizontal slit 6b-2. flows from left to right in the
On the other hand, the magnetic flux flowing through the leg 5b of the lower layer changes its direction in the in-plane direction at the oblique slit 5b-3 near the contact. Then, the magnetic flux temporarily flows through the leg 5a which is blocked by the slit 5b-4 and which is in contact with the surface or the leg 5a on the opposite surface. Then, the magnetic flux flowing through the leg 5a flows through the yoke 6b. The yoke 6b and the yoke 6a are also provided with slits 3, and flow from left to right through the steel plates of the lateral yokes 6a and 6b while changing the flow direction.

In order to reduce the magnetic loss, in this embodiment, one is to increase the magnetic anisotropy of the steel sheet and adjust the flow of magnetization in the in-plane direction of the steel sheet. The other is to adjust the flow of magnetization flowing in the out-of-plane direction (perpendicular to the plane) of the steel plate that is in contact with the leg and the yoke at the plane. In both cases, a slit is inserted for adjustment, but the direction in which the slit is inserted differs between the in-plane direction adjustment and the out-of-plane direction adjustment.

The purpose of providing the slits 2 provided in the axial direction of the steel plate is to increase the magnetic anisotropy of the steel plate and reduce the excitation magnetic field. The width of the slit 2 depends on the number of lines in which the slit 2 is formed (the number of slits), but it is important not to disturb the flow of the magnetic flux of the steel plate. Therefore, increasing the slit width more than necessary is not desirable because the magnetic loss tends to increase. As for the width of the slit 2, the product of the number of lines of the slit 2 and the width of the slit 2 is preferably 5% or less of the width of the steel sheet.
For example, when the width of the steel plate is 200 mm and the number of lines of the slit 2 is five, the width of one slit 2 is 2 mm or less. The minimum width of the slit 2 is sufficient as long as the magnetic anisotropy is strong in the axial direction of the steel plate, so the width of the slit 2 should be physically separated. I wish I had. It is important that the slit 2 has a groove, and the shape of the slit should be determined from the relationship between the groove width, the groove depth, the strength of the magnetic anisotropy at that time, and the magnetic loss. Also, the shape of the slit may be formed in consideration of the easiness of the processing method for providing the slit.

In this example, the slits 2, 3 and 4 were formed using laser heat. The slit width provided by laser heat is about 0.05 millimeters. Each slit may be a hole penetrating the plate, or a groove having a depth of a part of the plate thickness. In the laser heat slitting method, the laser heat input and processing speed are adjusted to adjust the groove depth, such as a slit that penetrates the steel plate and a slit that is up to about half the thickness of the steel plate. Can be processed. Alternatively, a method of processing slits by pressing or a method of processing by mixing abrasive grains with high-pressure water may be used without any problem. In this case, the slits penetrate the steel plate. The steel plate with slits is placed in a furnace and heated for heat treatment. By providing slits, the magnetic domains can be made anisotropic by heat treatment alone without applying a magnetic field, and the magnetic anisotropy can be made stronger by heat treatment in a magnetic field. When only heat treatment is performed without applying a magnetic field, the coil for applying a magnetic field becomes unnecessary, and the structure of the furnace is simplified.

According to this embodiment, since the steel sheet of the laminated iron core is provided with a plurality of parallel slits (first slits) extending in the longitudinal direction, the magnetic domain of the steel sheet is made anisotropic or the magnetic anisotropy is strengthened. It is possible to provide a transformer with small magnetic loss.

Further, according to the present embodiment, near the point of contact between the leg and the yoke, a slit (second slit) inclined from the axial direction of the leg or the yoke toward the connected yoke or leg is provided. As a result, the magnetic flux can flow smoothly, and a transformer with less magnetic loss can be provided.

Furthermore, according to the present embodiment, in the laminated core transformer having a frame core, a slit (third slit) parallel to the obliquely cut end surface is provided near the contact point between the leg and the yoke. , the magnetic anisotropy in the direction perpendicular to the plane of the leg or yoke (out-of-plane direction) can be strengthened, the flow of the magnetic circuit of the contact where the leg and yoke overlap can be improved, and the magnetic loss can be reduced. Fewer transformers can be provided.

A stacked core transformer of Example 2 will be described with reference to FIG. One of iron cores used in transformers is one using an amorphous ribbon. Amorphous ribbons are characterized by being thinner than the thickness of electromagnetic steel sheets, which are often used in transformers, and are about one-tenth the thickness of the electromagnetic steel sheets.

FIG. 3(a) shows a block body 10 in which, for example, 10 amorphous strips are laminated and joined vertically at welding points 12 or 13. FIG. By manufacturing the block body 10 with the same thickness as the electromagnetic steel sheet, it is possible to manufacture with the same production capacity as the manufacturing line for the electromagnetic steel sheet.

FIG. 3(b) shows a laminated iron core in which the leg 5 and the yoke 6 are stacked using the block body 10 described above to form a so-called frame iron core. Welding points 12 or 13 are provided on the legs 5 and the yoke 6 . Slits 2, 3, and 4 are provided in the same manner as in FIG. 1 described above, and the magnetic loss of the magnetic circuit of the iron core, which is flattened by block bodies of amorphous ribbons, can be reduced.

The welding points 12 are provided along the flow of the magnetic circuit, and the combination of the slits 2 and the welding points 12 can increase the magnetic anisotropy and reduce the magnetic loss of the iron core. Further, the welding point 13 is a welding point provided near the contact point between the leg 5 and the yoke 6. For example, in order to facilitate the flow of the magnetic circuit to the upper and lower adjacent layers, the combination of the slit 4 and the welding point 13 is a magnetic field near the contact point. It promotes saturation and can reduce the magnetic loss of the iron core.

Laser heat can be used as one method for forming the slits 2 to 4 shown in FIG. 3(a). Slits 2 to 4 are provided by laser heat by applying a laser beam to a predetermined surface of a block formed by laminating a plurality of, for example, 10 amorphous strips and joining them at a welding point 12 or a welding point 13. . The depth of the slit groove can be adjusted by controlling the strength of the laser heat. On the other hand, since the side surfaces of the slit grooves are welded by the laser heat, the upper and lower stacked ribbon layers in the block are fixed and joined near the slit grooves. In this case, the number of welding points 12 or welding points 13 may be reduced, and welding points may be formed on the side surfaces of grooves with slits.

FIG. 4 shows a sectional view of a laminated iron core composed of a block body in which a plurality of amorphous ribbons are laminated. FIG. 4(a) shows a block, and FIG. 4(b) shows a AA section of the block in which 10 amorphous ribbons are laminated. Two types of slits 2 with different groove depths are provided in the AA cross section. The slit section 24 penetrates the block body. The slit cross section 25 is a groove for up to the sixth laminated block body. In this embodiment, the slit 2 is formed using laser heat, and the slit is formed by irradiating the laser beam from the upper side to the lower side in FIG. 4(b). Since the irradiation is from the upper side of the drawing, the cross-sectional shape of the slits 24 and 25 has a smaller groove width on the lower side.

Therefore, the groove width of the lower ribbon is narrower than that of the upper ribbon in which 10 sheets are laminated. Although it depends on the heat input conditions of the laser beam, a welding surface 26 is formed on the groove side surface of the slit 24 due to the heat of the laser beam. The welded surface 26 is formed by melting the groove side surface of the upper ribbon and welding it to the contacting lower groove side surface. The occurrence of this welded surface 26 makes it possible to firmly fix the layers of a block body composed of a plurality of laminates, thereby making it possible to prevent peeling during manufacturing or improve reliability after manufacturing.

The slit 25 is a cross section of the groove depth up to the sixth layer. The depth of the groove can be controlled by adjusting the heat input of the laser beam and the scanning speed of the laser beam. By controlling the depth of the grooves, for example, it is not necessary to pass through all the slits, and the slits are passed through the places where the magnetic anisotropy of the magnetic circuit is to be strengthened, and the magnetic flux density is to be increased above the magnetic anisotropy. can further improve the magnetic performance of the iron core by making the depth of the slit groove shallower.

It is the same as in Example 1 in that the block having slits is subjected to heat treatment.

In this embodiment, the stacked core is composed of a block body in which a plurality of amorphous ribbons are laminated, but it may be composed of a clad material in which a silicon steel plate and an amorphous ribbon are laminated.

According to the present embodiment, the same effects as those of the first embodiment can be obtained in the laminated core transformer in which block bodies in which amorphous ribbons are laminated are stacked. In addition, by irradiating a block body in which amorphous ribbons are laminated to form a welding point by irradiating a laser beam, an effect similar to that of a slit can be obtained. Furthermore, by irradiating a laser beam to a block in which amorphous ribbons are laminated to form slits, the layers of the amorphous ribbons can be firmly fixed, making it difficult to peel off during manufacturing and improving reliability after manufacturing. can be improved.

A laminated core transformer of Example 3 will be described with reference to FIG. FIG. 5 shows layers of a so-called strip core, in which the steel plates of the legs 5 and the yoke 6 are rectangular parallelepipeds. FIGS. 5(a) and 5(b) show the odd and even layers of the stacked layers. For example, in the odd-numbered layer (upper layer) 20a in FIG. 5(a), the yoke 6 extends to both ends and the leg 5 is sandwiched between the yokes 6, whereas in the even-numbered layer (lower layer) in FIG. ) 20b, the legs 5 extend to the upper and lower ends, and the yoke 6 is sandwiched between the legs 5. As shown in FIG. By stacking the odd-numbered layers 20a and the even-numbered layers 20b, the magnetic flux flows in the upper and lower adjacent layers at the connection between the leg 5 and the yoke 6, thereby improving the magnetic flux flow. The odd-numbered layers 20a and the even-numbered layers 20b are paired, and a number of such pairs are stacked to form a laminated core.

The steel plates of the legs 5 and the yoke 6 are provided with slits 2 along the axial direction of the steel plates up to the vicinity of the end faces. By making the steel plate a rectangular parallelepiped, the material yield of the steel plate is good, the number of man-hours for manufacturing the core is reduced, and the handling becomes easy, so the production cost can be reduced. On the other hand, for the problem of large magnetic loss compared to the frame iron core, the magnetic anisotropy can be strengthened by providing the slits 2 in the steel plate. As for the flow of the magnetic circuit of the leg 5 and the yoke 6, since the slit 2 is provided up to the vicinity of the end face, the flow between adjacent layers, which are contacts, can be improved.

According to this embodiment, since the strip-shaped core having the slits is used, the material yield of the steel plate is good, the number of man-hours for manufacturing the stacked core is reduced, handling is easy, and a stacked core transformer with small magnetic loss is provided. can do.

A stacked core transformer of Example 4 will be described with reference to FIG. FIG. 6 shows laminated core layers of a so-called strip core in which the steel plates of the leg 5 and the yoke 6 are rectangular parallelepiped, similar to Example 3 of FIG. FIGS. 6(a) and 6(b) show the odd and even layers of the stacked layers.

The difference from the third embodiment is that slits 3 and 4 are provided at the ends of the yoke 6 or leg 5 to improve the flow of magnetic flux in the magnetic circuit. For example, in the odd-numbered layer (upper layer) 20a of FIG. 6(a), slits 3 and 4 are provided at the ends and the central portion of the yoke 6, which is the connecting portion with the leg 5. As shown in FIG. The slit 3 is provided at an angle of approximately 30° from the longitudinal direction of the yoke toward the leg so that the magnetic flux can easily flow to the leg 5 . The slits 4 are formed obliquely with respect to the longitudinal direction in order to facilitate the formation of a magnetic circuit in the out-of-plane direction, that is, in the direction perpendicular to the plane of the leg 5 or yoke 6 . By making an oblique slit 4 in front of the connecting portion between the leg and the yoke, it is possible to make it easier for the magnetic flux to flow through the steel plates above and below the contact.

According to the present embodiment, as in the third embodiment, by forming the steel sheet into a rectangular parallelepiped, the material yield of the steel sheet is improved, the number of man-hours for manufacturing the stacked iron core is reduced, and the handling becomes easier, so that the production cost can be reduced. In addition, to solve the problem that the magnetic loss is larger than that of the frame iron core, the magnetic anisotropy can be strengthened by providing the slits 2 in the steel plate. As for the flow of the magnetic circuit of the leg 5 and the yoke 6, since the slits 3 and 4 are provided in the same manner as in the first embodiment, the flow between adjacent layers, which are contacts, can be improved.

A stacked core transformer of Example 5 will be described with reference to FIG. FIG. 7 shows a transformer having a so-called frame core, in which the steel plates of the legs 5 and the yoke 6 are trapezoidal, similar to the first embodiment shown in FIG. While the first embodiment is applied to a three-phase tripod transformer, the present embodiment is applied to a single-phase transformer. The single-phase core has a coil 7 wound around each of two legs 5 and a yoke 6 connecting the legs 5 to form a magnetic circuit. The operations of the slits 2, 3 and 4 are the same as in the first embodiment.

According to this embodiment, in the single-phase transformer, as in the first embodiment, the steel plates of the legs 5 and the yoke 6 are provided with slits 2 in the axial direction to increase the magnetic anisotropy of the steel plates and reduce the excitation magnetic field. can be made smaller. Also, near the point of contact between the leg 5 and the yoke 6, a slit 3 is formed obliquely with respect to the longitudinal direction of the steel plate so that the flow direction of the magnetic circuit does not suddenly change direction. Magnetic loss can be reduced. Furthermore, near the contact point between the leg 5 and the yoke 6, by inserting a slit 4 parallel to the end face of the obliquely cut steel plate, the magnetic loss at the end face of the oblique cut is reduced, and the magnetic flux flows through the steel plates above and below the contact. can be made easier.

In each of the above embodiments, examples of applying the present invention to laminated transformers have been described, but the present invention can be applied to stationary induction devices including reactors.

1... Stacked iron core 2... Longitudinal slit (first slit)
3 ... Slanted slit (second slit) near the point of contact between the leg and the yoke
4 Slit parallel to the end surface (third slit)
5 Legs 5a Upper layer leg 5a-2 First slit 5a-3 provided in upper layer leg Second slit 5a-4 upper layer leg Third slit 5b provided in the leg of the layer... Leg 5b-2 of the lower layer... First slit 5b-3 provided in the leg of the lower layer... Second slit provided in the leg of the lower layer Slits 5b-4 provided in the leg of the lower layer Third slit 6 Yoke 6a Yoke 6a-2 of the upper layer First slit 6a-3 provided in the yoke of the upper layer A second slit 6a-4 provided in the yoke of the upper layer... A third slit 6b provided in the yoke of the upper layer... A yoke 6b-2 of the lower layer... Provided in the yoke of the lower layer First slit 6b-3...Second slit 6b-4 provided in the lower layer yoke...Third slit provided in the lower layer yoke 7...Coil 10...Amorphous foil block 12 … Welding points along the flow of the magnetic circuit (first welding point)
13 ... Welding point near contact point between leg and yoke (second welding point)
20a ... upper layer (for example, odd number layer)
20b... Lower layer (for example, even layer)
24 Slit cross-section provided with a penetrating slit 25 Slit cross-section provided with a non-penetrating slit 26 Welded surface generated on the side surface of the groove when the slit is provided

Claims (13)

A laminated iron core type static induction device having a laminated iron core consisting of a leg portion and a yoke portion that are a combination of block bodies in which amorphous ribbons are laminated,
The amorphous ribbon is provided with a plurality of parallel first slits extending in the longitudinal direction,
A laminated iron core static induction device, wherein the block formed by laminating the amorphous ribbons has a plurality of first welding points provided along the flow of the magnetic circuit. A laminated iron core type static induction device having a laminated iron core consisting of a leg portion and a yoke portion that are a combination of block bodies in which amorphous ribbons are laminated,
The amorphous ribbon is provided with a plurality of parallel first slits extending in the longitudinal direction,
A laminated iron core stationary induction device, wherein the block body in which the amorphous ribbons are laminated has a welding surface on a side surface of the first slit. A laminated iron core static induction device having a laminated iron core consisting of a leg and a yoke that are a combination of blocks or steel plates laminated with amorphous ribbons,
The amorphous ribbon or the steel plate is provided with a plurality of parallel first slits extending in the longitudinal direction,
The stacked core is a frame core,
A laminated core type stationary induction device comprising a second slit inclined from the axial direction of the leg or yoke toward the connected yoke or leg in the vicinity of the contact point between the leg and the yoke. The laminated iron core type stationary induction device according to claim 3 , further comprising:
A laminated iron core static induction device, characterized in that a third slit is provided in parallel with an end surface of the obliquely cut block body or steel plate near the contact point between the leg portion and the yoke portion. In the laminated iron core type stationary induction device according to claim 4 ,
A laminated core stationary induction device, wherein a block body in which amorphous thin strips are laminated has a plurality of second welding points provided along the third slits. A laminated iron core static induction device having a laminated iron core consisting of a leg and a yoke that are a combination of blocks or steel plates laminated with amorphous ribbons,
The amorphous ribbon or the steel plate is provided with a plurality of parallel first slits extending in the longitudinal direction,
The stacked core is a strip core,
A second slit is provided near a point of contact between the leg and the yoke and is inclined toward the yoke or the leg connected from the longitudinal direction of the leg or the yoke. Stacked iron core static induction device. The laminated iron core type stationary induction device according to claim 6 , further comprising:
A laminated iron core type static inductor characterized by comprising a third slit formed obliquely with respect to the axial direction for flowing magnetic flux to adjacent upper and lower layers in the vicinity of the contact point between the leg and the yoke. device. In the laminated iron core type stationary induction device according to any one of claims 1 to 7 ,
A stacked-core stationary induction device, wherein the stacked-core is a three-phase three-legged core. In the laminated iron core type stationary induction device according to any one of claims 1 to 7 ,
A stacked-core stationary induction device, wherein the stacked-core is a single-phase core. A stacked-core stationary induction device having a stacked core made of a combination of blocks or steel plates in which amorphous ribbons are laminated,
The amorphous ribbon or the steel sheet is provided with a first slit composed of a plurality of pores extending in the longitudinal direction,
The first slit is provided in a region inside the outer edge of the amorphous ribbon or steel plate,
A stacked-core stationary induction device, comprising: a second slit inclined from a leg of the stacked-core to a yoke connected to the leg. A laminated iron core type static induction device having a laminated iron core combining blocks in which amorphous ribbons are laminated,
The amorphous ribbon is provided with a first slit composed of a plurality of pores extending in the longitudinal direction,
The first slit is provided in a region inside the outer edge of the amorphous ribbon,
A stacked core type characterized in that, among the laminated amorphous ribbons, the area of the slits of the amorphous ribbons of the second layer adjacent thereto is larger than the area of the slits of the amorphous ribbons of the first layer. Stationary induction equipment. A laminated iron core type static induction device having a laminated iron core combining blocks in which amorphous ribbons are laminated,
The amorphous ribbon is provided with a first slit composed of a plurality of pores extending in the longitudinal direction,
The first slit is provided in a region inside the outer edge of the amorphous ribbon,
A laminated core characterized in that the inner wall of the slit of the amorphous ribbon of the first layer among the laminated amorphous ribbons is tapered toward the amorphous ribbon of the adjacent second layer. type stationary induction equipment. In the laminated iron core type stationary induction device according to claim 10 ,
A lamination-core stationary induction device, characterized in that it has a third slit parallel to the end face where the leg and the yoke are connected.

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