Amorphous transformer and method of manufacturing the same

Abstract

Provided is an amorphous transformer having low environmental load at the time of manufacture, and a method for manufacturing the same. In the amorphous transformer, an amorphous core that constitutes the amorphous transformer has a region in which the iron loss is greater than in other regions in the circumferential direction, and the region in which the iron loss is greater has a smaller range than the other regions.

Description

Technical Field

[0001] This invention relates to amorphous transformers and their manufacturing methods. Background Technology

[0002] Amorphous transformers, which are made by stacking multiple layers of amorphous thin films on the core of a transformer, are widely used due to their low power loss and excellent environmental adaptability.

[0003] It is known that during its manufacturing process, the amorphous iron core undergoes an annealing process involving heating to improve its magnetic properties.

[0004] Patent Document 1 discloses the use of a forming fixture during annealing. Furthermore, Patent Document 2 discloses a method of annealing an amorphous iron core by winding an excitation winding around it and applying a high-frequency voltage, thereby heating the iron core.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 7-220941.

[0008] Patent Document 2: Japanese Patent Application Publication No. 2018-160502. Summary of the Invention

[0009] The problem that the invention aims to solve

[0010] Regarding annealing, Patent Document 1 discloses a method of placing the entire assembly into an annealing furnace. However, this method requires the entire annealing furnace to reach a high temperature, resulting in poor heat utilization efficiency during manufacturing and making it a manufacturing method with high environmental impact.

[0011] On the other hand, Patent Document 2 discloses a method of annealing by winding an excitation winding on an amorphous iron core and applying a high-frequency voltage, thereby heating the iron core—a method known as high-frequency heating. According to this method, since only the object to be heated can be subjected to high-frequency heating, i.e., heating like a microwave oven, annealing can be performed with the minimum required amount of electricity. Therefore, it is a manufacturing method with low environmental impact.

[0012] Here, patent document 1 is in Figure 2 Paragraphs 0024 and 0025 disclose that: an inner circumferential forming jig and an outer circumferential forming jig are used to fasten the iron core by bolting the inner and outer circumferential forming jigs, and annealing is performed together with the forming jigs. However, as a disclosed annealing method, neither high-frequency heating is disclosed nor implied.

[0013] On the other hand, although Patent Document 2 discloses an annealing method based on high-frequency heating, it neither discloses nor implies the forming fixture that should be used in this process.

[0014] In view of the above, the present invention aims to provide a manufacturing method for amorphous transformers and manufacturing methods thereof that use appropriate forming fixtures during high-frequency heating, and thereby achieves amorphous transformers with low manufacturing load.

[0015] Technical solutions for solving the problem

[0016] An example of a technical solution used to solve the above problem is given below.

[0017] An amorphous transformer is characterized in that, in the amorphous transformer, a portion of the amorphous core constituting the amorphous transformer has a greater iron loss than the iron loss of other portions in the circumferential direction, and the area with greater iron loss is smaller than the range of the other portions.

[0018] Invention Effects

[0019] According to the present invention, it is possible to provide an amorphous transformer with low environmental impact during manufacturing and a method thereof.

[0020] Other aspects and effects of the present invention will become clear from the following full description. Attached Figure Description

[0021] Figure 1 This is a diagram showing the state of the amorphous iron core during annealing in one embodiment of the present invention.

[0022] Figure 2 This is a diagram showing the state of the amorphous iron core during annealing in one embodiment of the present invention.

[0023] Figure 3 This is a diagram showing the state of the amorphous iron core during annealing in one embodiment of the present invention.

[0024] Figure 4 This is a diagram showing the state of the amorphous iron core during annealing in one embodiment of the present invention.

[0025] Figure 5 This is a diagram showing the state of the amorphous iron core during annealing in one embodiment of the present invention. Detailed Implementation

[0026] Hereinafter, embodiments of the present invention will be described using the accompanying drawings.

[0027] Example 1

[0028] Amorphous iron cores can be used as low-loss iron cores because their losses are as low as 1 / 3 to 1 / 4 compared to silicon steel sheets. As an example, a laminated structure of amorphous thin strips (approximately 0.025 mm thick) is suitable.

[0029] Amorphous iron cores are formed by bundling multiple coiled amorphous alloy strips into a ring shape, cutting them, stacking the cut amorphous alloy strips in a U-shape on a rectangular mandrel, and joining the ends together.

[0030] Next, a magnetic field is applied along the length of the iron core, and the amorphous iron core is subjected to high-frequency induction heating at a high temperature of 300–400°C for heat treatment. This achieves the same high-frequency heating as in a microwave oven. Through annealing in a magnetic field, the directions of the magnetic moments tend to be aligned, and the axis is fixed, thus improving the magnetic properties.

[0031] Patent document 1 discloses annealing using an annealing furnace. As an example of a commonly used annealing furnace, heat is indirectly supplied to the iron core through the warm air from the electric furnace, the atmosphere inside the furnace is filled with inert gas to prevent oxidation of the iron core, and the inert gas is used to transfer heat.

[0032] The furnace structure consists of a heater section, a circulating fan section, and a cooling section, all located inside the furnace. Gas, after being regulated by the heater and cooling sections, circulates within the furnace via the circulating fan. This method of indirectly supplying heat to the iron core via warm air from the electric furnace requires a significant amount of time to reach the specified heat treatment conditions. To meet the energy reduction requirements of recent years, this energy loss needs to be reduced.

[0033] On the other hand, Patent Document 2 proposes a manufacturing method that involves annealing an amorphous iron core by winding an excitation winding around it and applying a high-frequency voltage, utilizing the heat generated by the iron core. However, it does not mention the holding component of the iron core in this process.

[0034] Here, patent document 1 is in Figure 2 Paragraphs 0024 and 0025 disclose that: an inner circumferential forming jig and an outer circumferential forming jig are used to fasten the iron core by bolting the inner and outer circumferential forming jigs, and annealing is performed together with the forming jigs. However, as a disclosed annealing method, neither high-frequency heating is disclosed nor implied.

[0035] That is, when annealing by high-frequency voltage, or in other words, high-frequency heating or high-frequency annealing, the appropriate forming fixtures have not been adequately studied by those skilled in the art. It has been found that this is an important missing link when applying high-frequency heating to the manufacture of amorphous iron cores.

[0036] Amorphous magnetic ribbons forming amorphous iron cores are hard and brittle. Furthermore, because they are formed by stacking hundreds of ribbons with a thickness of 25 μm, sufficient mechanical strength and rigidity cannot be achieved, making them difficult to stand upright. Therefore, the study of appropriate forming fixtures is crucial when performing high-frequency heating or high-frequency annealing.

[0037] Figure 1This is an illustrative diagram illustrating the annealing process of a transformer in one embodiment of the present invention. 1 is an amorphous iron core, 10 is an outer support member, 11 is an inner support member, and 15 is a fastening bolt. The outer support member 10 and the inner support member 11 are fastened together by the fastening bolt 15. Furthermore, the fastening bolt 15 itself is made of insulating material, or insulation is ensured by a combination of a washer and a hole serving as the space around the bolt.

[0038] Then, the amorphous iron core, in other words, a large number of stacked amorphous thin films, is clamped and secured by the outer support member 10 and the inner support member 11. In this state, the amorphous iron core 1 is subjected to high-frequency heating and heat treatment at 300 to 400°C as a high-frequency voltage-based annealing, in other words, high-frequency heating or high-frequency annealing.

[0039] In this embodiment, the outer support member 10 and the inner support member 11 used at this time have very distinctive shapes.

[0040] That is, the outer support component 10 is composed of four parts. Thus, each part is configured not to be electrically connected. In other words, it can be described as having a non-forming region in the circumferential direction.

[0041] On the other hand, the inner support member 11 is arranged such that a non-forming area exists in a portion of its circumferential direction. Figure 1 In this case, the shape after the C-shape is reversed becomes a non-forming region, where the opening part of the C-shape becomes a non-forming region. In other words, it can also be described as having a non-forming region in the circumferential direction.

[0042] Whether there are non-forming areas in the circumferential support components is not a problem in annealing using an annealing furnace as disclosed in Patent Document 1. This is because the entire annealing furnace is in a uniform temperature atmosphere.

[0043] On the other hand, in heating by applying a high-frequency voltage as disclosed in Patent Document 2, the shape of the supporting component needs to be carefully considered. Otherwise, high-frequency heating itself will not be possible.

[0044] The following explains the necessary conditions and the reasons for them.

[0045] <Condition 1> The outer support component has a non-forming area.

[0046] <Reason 1> During high-frequency heating, high frequency is introduced from the non-forming region of the outer support component to the amorphous iron core 1. Therefore, if the outer support component does not have a non-forming region, high frequency cannot be introduced, and high-frequency heating cannot be established in principle.

[0047] <Condition 2> The inner support component has a non-forming area.

[0048] <Reason 2> If the inner support component does not have a non-forming region, the current excited in the amorphous iron core 1 due to the high frequency will form a current loop in the inner support component and will hardly flow through the amorphous iron core 1 anymore. As a result, high-frequency heating cannot be achieved.

[0049] This is because both the outer and inner support components are metals with a thickness of several millimeters to several centimeters, while the amorphous thin film forming the amorphous iron core has a thickness of tens of micrometers, with a difference of 2 to 3 orders of magnitude.

[0050] <Condition 3> The inner support component is formed as a whole across multiple sides.

[0051] <Reason 3> During heating in an annealing furnace, the temperature of the amorphous iron core 1 rises gradually and uniformly throughout. However, during high-frequency heating, while the temperature of the amorphous iron core 1 rises rapidly, the rate of temperature increase differs between the inner and outer circumferences. This is because the length (perimeter) of the amorphous thin film on the inner circumference is structurally shorter than that on the outer circumference. Therefore, since the length of the object being heated on the inner circumference is shorter than that on the outer circumference, even at the same high frequency, the temperature rise on the inner circumference is more rapid than that on the outer circumference.

[0052] Therefore, this study discovered that the shape of the inner circumference of the high-frequency heating element is prone to change. As a practical solution, the inner support component needs to be integrally formed across multiple sides. This allows for reliable shape support, especially at corners.

[0053] The inventors have discovered that it is essential to simultaneously achieve the above conditions 1 to 3 when realizing the manufacturing method of annealing the core of a transformer using high-frequency heating and the practical application of amorphous transformers manufactured by this method.

[0054] Therefore, this embodiment and subsequent embodiments illustrate a method for manufacturing an amorphous transformer, which uses a support member capable of simultaneously achieving the shapes described in conditions 1 to 3 above to manufacture the amorphous transformer, and describes the amorphous transformer manufactured thereby.

[0055] As an example of the manufacturing method of the amorphous transformer of the present invention, it is described below.

[0056] A method for manufacturing an amorphous transformer by annealing an amorphous core using high-frequency induction heating, wherein an annealing fixture is used during the annealing process, the annealing fixture comprising: an outer support member having a non-forming region; an inner support member having a non-forming region; and fasteners that secure the outer support member and the inner support member while ensuring their insulation, wherein the inner support member is integrally formed across multiple sides.

[0057] By adopting this manufacturing method, the annealing of amorphous cores based on high-frequency induction heating can be put into practical use. For amorphous transformers with low loss and low environmental impact as products, the environmental impact during manufacturing can be further reduced, thereby providing transformers with excellent environmental performance throughout their entire life cycle.

[0058] Furthermore, whether the aforementioned support components were used for high-frequency annealing during the manufacturing process can be partially confirmed by investigating the iron loss of the amorphous core of the finished product. That is, when using such... Figure 1 In the case of such outer and inner support components, the iron loss will vary slightly depending on their location. For example, in the case of amorphous iron cores, the iron loss in the non-forming area of ​​the inner support component, that is, the part corresponding to the C-shaped opening, is slightly greater than that in other areas.

[0059] This is because the parts with thicker, metal inner support components have a higher final annealing temperature during high-frequency annealing due to their heat capacity, resulting in more thorough annealing.

[0060] Of course, if an ultra-long annealing process is performed, this difference will be eliminated, but this will generate additional power consumption. Therefore, it is necessary to balance the increased power consumption during manufacturing with the reduced losses during use, and optimize manufacturing conditions in a balanced way to reduce the environmental impact throughout the entire life cycle.

[0061] Therefore, an amorphous transformer that uses a support component that meets the above three conditions and has undergone annealing through high-frequency heating will have the following characteristics.

[0062] An amorphous transformer is characterized in that, in the amorphous transformer, a portion of the amorphous core constituting the amorphous transformer has a larger iron loss than other portions in the circumferential direction, and the region with the larger iron loss is smaller than the range of the other portions.

[0063] Here, the preferred structure of the core of the amorphous transformer in this embodiment will be described.

[0064] To ensure a smooth magnetic flux distribution within the iron core, the amorphous iron core, formed by stacking amorphous thin films, preferably employs an overlap structure that includes both overlapping and stepped overlap joints. This increases the distance between the ends of the overlapped portions within the iron core and shortens the distance towards the outer periphery. This is because it allows for a smoother magnetic flux distribution within the iron core.

[0065] Furthermore, as the inner support member 11 in this embodiment, more preferably, such as in Figure 1 As illustrated, the corners have an R-shape or curvature. This is because shape retention during amorphous core annealing is more reliable.

[0066] also, Figure 1A portion of its shape characteristics can also be described as follows.

[0067] A structure is adopted that does not form a loop around the amorphous iron core with metal to prevent circulating current. In addition, the support component is provided with a non-forming area, or adopts a shape that removes a portion of the loop, or a non-loop shape, to avoid forming the same loop as the iron core.

[0068] further, Figure 1 A portion of its shape characteristics can also be described as follows.

[0069] When the iron core is annealed by induction heating with a high-frequency voltage, a tendency emerges where the magnetic flux density is higher on the inner circumference (where the magnetic circuit length is shorter) and lower on the outer circumference (where the magnetic circuit length is longer). This results in a gradient in the iron loss value between the inner and outer circumferences, a characteristic of annealing via high-frequency excitation. Furthermore, due to the presence of areas where the core support components do not contact the core, localized temperature distribution occurs, and the iron loss value changes only in the inner circumference where the annular region has been removed.

[0070] Therefore, in the iron core using the technical concept disclosed in this embodiment, in addition to the gradient between the inner and outer circumferences, some iron loss changes are also observed. Therefore, the transformer using this application can also be described as a transformer having a wound iron core in which the magnetic properties of the inner circumference decrease at one or more points in the circumferential direction.

[0071] Furthermore, as mentioned above, the iron loss in the area corresponding to the C-shaped opening is slightly greater than in other areas. This is because the portion with the thicker, metallic inner support member has a higher final annealing temperature during high-frequency annealing due to its heat capacity, resulting in more thorough annealing.

[0072] The same concept, in use Figure 1 In an amorphous transformer, where the inner and outer support components of the structure are annealed by high-frequency heating, the following conditions are observed.

[0073] That is, in an amorphous transformer, the amorphous core that constitutes the amorphous transformer has a portion of iron loss that is greater than other portions in the circumferential direction, and the area of ​​the region with greater iron loss is smaller than the other portions.

[0074] Furthermore, the amorphous core has a gradient of iron loss on the inner and outer circumferential sides in the amorphous transformer.

[0075] Furthermore, the region with a larger iron loss ratio than other parts in the circumferential direction exists in both the inner and outer circumferential sides of the amorphous transformer.

[0076] Furthermore, it refers to the location of the region where the iron loss is larger than other parts in the circumferential direction, specifically the amorphous transformer located on different sides of the inner and outer circumferential sides in the circumferential direction.

[0077] Furthermore, it refers to the location of the region where the iron loss is larger than other parts in the circumferential direction, specifically the amorphous transformer located at the edge on the inner circumference and at the corner on the outer circumference.

[0078] In addition, the manufacturing method can also be described as follows.

[0079] A method for manufacturing an amorphous transformer includes a step of annealing an amorphous iron core by applying a high frequency. In this step, an inner support component and an outer support component are used, as well as a fastening fixture for fastening the inner support component and the outer support component in an insulated state. Both the inner support component and the outer support component have non-formed regions, and the inner support component is integrally formed on multiple sides.

[0080] Furthermore, the outer support member is disposed in the area outside the corner or bend, while the inner support member is disposed in the area including the corner or bend.

[0081] Example 2

[0082] Figure 2 It corresponds to Figure 1 The image. (and) Figure 1 The difference lies in the shape of the inner support component 11. Figure 1 In the middle, the left part of the image is a non-formed inverted C-shape, but... Figure 2 In the middle, there are two non-forming areas, forming a C-shape with the top and bottom facing each other.

[0083] exist Figure 2 In its shape, while producing the effects described in Example 1, it also has a greater effect than Figure 1 The shape makes it easier to adjust the position and fastening force of the inner support component 11.

[0084] Furthermore, if described as a manufacturing method, it is an amorphous transformer manufacturing method with multiple inner support components as disclosed in Example 1.

[0085] Example 3

[0086] Figure 3 It corresponds to Figure 2 The image. (and) Figure 1 The difference lies in the shape of the inner support member 11. This embodiment is characterized in that... Figure 2 The two inner support components 11, which are separated at the top and bottom, are formed into one unit through the central component.

[0087] Thus, while producing the effects of Embodiment 2, it also has the advantage of increasing the strength of the inner support component 11.

[0088] Furthermore, if described as a manufacturing method, in addition to the disclosure in Example 2, it is a method for manufacturing an amorphous transformer in which a support body is arranged between the inner support components. Further, the support body and the inner support components are integrally formed.

[0089] Example 4

[0090] Figure 4 It corresponds to Figure 3 The image. (and) Figure 3 The difference is that the two inner support components 11 are not as... Figure 3 Instead of being integrated through a central component, it is connected through other support components 12.

[0091] Therefore, while producing the effects described in Example 3, it also has the advantage of being easy to make fine adjustments such as pressing adjustments between the inner support components 11.

[0092] Example 5

[0093] Figure 5 It corresponds to Figure 2 The image. (and) Figure 2 The difference lies in that the outer support member 10 is also integrally formed across multiple sides. Therefore, while producing the effects described in Embodiment 2, it is also possible to enhance the shape retention performance of the amorphous core 1 through the outer support member 10.

[0094] Furthermore, by using external support components with large heat capacity to insulate or maintain the temperature of corners, curved sections, or R-sections that are prone to heat dissipation, the efficiency of high-frequency heating is improved, and the iron loss of amorphous transformers is further reduced.

[0095] In addition, in use Figure 5 When considering the outer and inner support components of the structure, as a characteristic of amorphous transformers, the number of regions with larger iron losses than other parts in the circumferential direction is the same on the inner and outer circumferential sides, and is located at the circumferential edge of the amorphous transformer.

[0096] The manufacturing method is described as follows.

[0097] A method for manufacturing an amorphous transformer includes a step of annealing an amorphous core at high frequency. In this step, an inner support member and an outer support member are used, as well as a fastening fixture for fastening the inner and outer support members in an insulated state. Both the inner and outer support members have non-formed regions, and the inner support member is integrally formed on multiple sides. The outer and inner support members are disposed in regions including corners or bends.

[0098] Example 6

[0099] This embodiment is an example used in conjunction with Embodiments 1 to 5.

[0100] The feature of this embodiment is that the inner support member 11 in embodiments 1 to 5 protrudes in the shape of an amorphous transformer compared to the outer support member 10.

[0101] Although not illustrated, but Figures 1 to 5 In this context, as a structural feature, the inner support member 11 protrudes or is longer than the outer support member 10 in the direction from which the drawing flies forward, or in the Z direction when the drawing is taken as the XY direction.

[0102] In this case, the amorphous iron core used in this embodiment, as disclosed as an example in Embodiment 1, is preferably a core formed by stacking amorphous thin films with overlapping portions. That is, in order to make the magnetic flux distribution inside the iron core smooth, the amorphous iron core formed by stacking amorphous thin films preferably adopts an overlapping structure including overlapping joints and stepped overlapping joints, so that the distance between the ends of the overlapping portions increases inside the iron core and decreases towards the outer periphery. This is because it makes the magnetic flux distribution inside the iron core smoother.

[0103] At this time, it is preferable that the inner support member 11 protrudes more than the outer support member 10, and that the protrusion is the aforementioned overlapping portion.

[0104] Because the linkage flux at the overlap is higher, it becomes a higher flux density than the average flux density of the iron core. Furthermore, since the inner circumferential magnetic circuit length of the amorphous iron core is short, the flux density becomes even more significantly higher. Therefore, due to the localized increase in flux density relative to the excitation flux density, eddy current losses, which are proportional to the square of the flux density, also increase, leading to higher temperatures during high-frequency induction heating.

[0105] To homogenize this effect, the inner support component on the inner periphery of the overlap protrudes upwards, forming a wind-receiving structure. This improves the cooling effect of the overlap.

[0106] The manufacturing method can be described as follows.

[0107] A method for manufacturing an amorphous transformer includes a step of annealing an amorphous core at a high frequency. In this step, an inner support component and an outer support component are used, as well as a fastening fixture for fastening the inner support component and the outer support component in an insulated state. Both the inner support component and the outer support component have non-formed regions, and the inner support component is integrally formed on multiple sides. The inner support component has a region that protrudes from the outer support component.

[0108] Furthermore, there is a method for manufacturing an amorphous transformer in which the protruding region corresponds to the overlapping portion of the amorphous iron core.

[0109] Example 7

[0110] This embodiment is based on the disclosure of Embodiment 6.

[0111] The feature of this embodiment is that, when annealing multiple amorphous iron cores simultaneously in the same processing chamber, the configuration of the multiple amorphous iron cores in the processing chamber is staggered so that the protruding positions of the protruding inner support members disclosed in Embodiment 6 are different.

[0112] Therefore, when multiple amorphous iron cores are processed simultaneously in the same processing chamber, the uneven distribution of environmental conditions such as wind exposure of the protruding inner support components can be avoided, thus suppressing manufacturing deviations between individual cores.

[0113] This invention is not limited to the structures disclosed in the above embodiments. Any modifications that apply the technical ideas disclosed in this specification are also included within the scope of this invention.

[0114] Furthermore, the technical concept disclosed in this invention can also be expressed as follows.

[0115] <Part 1>

[0116] In an amorphous transformer, a portion of the amorphous core that constitutes the amorphous transformer has a greater iron loss than the iron loss of other portions in the circumferential direction, and the area with greater iron loss is smaller than the range of the other portions.

[0117] <Part 2>

[0118] In the amorphous transformer described in <1>, the iron loss of the amorphous core has a gradient on the inner and outer peripheral sides.

[0119] <Part 3>

[0120] In the amorphous transformer described in <2>, the region with a larger iron loss ratio than other parts in the circumferential direction exists on both the inner and outer circumferential sides.

[0121] <Part 4>

[0122] In the amorphous transformer described in <3>, the number of regions with larger iron losses than other parts in the circumferential direction is greater on the outer circumferential side than on the inner circumferential side.

[0123] <Part 5>

[0124] In the amorphous transformer described in <4>, the region with larger iron loss than other parts in the circumferential direction is located on different sides of the inner and outer circumferential sides in the circumferential direction.

[0125] <Part 6>

[0126] In the amorphous transformer described in <5>, the region with a larger iron loss ratio than other parts in the circumferential direction is located at the edge on the inner circumferential side and at the corner on the outer circumferential side.

[0127] <Part 7>

[0128] In the amorphous transformer described in <3>, the number of regions with larger iron losses than other parts in the circumferential direction is the same on both the inner and outer circumferential sides, and is located at the edge in the circumferential direction.

[0129] <Part 8>

[0130] A method for manufacturing an amorphous transformer includes a step of annealing an amorphous iron core by applying a high frequency. In this step, an inner support component and an outer support component are used, as well as a fastening fixture for fastening the inner support component and the outer support component in an insulated state. Both the inner support component and the outer support component have non-formed regions, and the inner support component is integrally formed on multiple sides.

[0131] <Part 9>

[0132] In the method for manufacturing an amorphous transformer as described in <8>, the outer support member is disposed in a region other than the corner or bend, and the inner support member is disposed in a region including the corner or bend.

[0133] <Part 10>

[0134] In the manufacturing method of the amorphous transformer described in <Rule 9>, there are multiple inner support components.

[0135] <Part 11>

[0136] In the manufacturing method of the amorphous transformer described in <10>, there are multiple inner support components, and a support body is arranged between the inner support components.

[0137] <Part 12>

[0138] In the manufacturing method of the amorphous transformer described in <11>, the support body and the inner support component are integrated.

[0139] <Part 13>

[0140] In the method for manufacturing an amorphous transformer as described in <8>, the outer support member and the inner support member are arranged at a position including a corner or bend.

[0141] <Part 14>

[0142] In the manufacturing method of the amorphous transformer described in <8>, the inner support member has a region that protrudes more than the outer support member.

[0143] <Part 15>

[0144] In the manufacturing method of the amorphous transformer described in <14>, the protruding region is provided corresponding to the overlapping portion of the amorphous iron core.

[0145] Explanation of reference numerals in the attached figures

[0146] 1: Amorphous iron core

[0147] 10: Outer support components

[0148] 11: Inner support component

[0149] 12: Support Components

[0150] 15: Fastening bolts.

Claims

1. An amorphous transformer, characterized in that, The amorphous core constituting the amorphous transformer has a portion with greater iron loss than other portions in the circumferential direction, and the region with greater iron loss is smaller than the range of the other portions.

2. The amorphous transformer according to claim 1, characterized in that, The iron loss of the amorphous iron core has a gradient on the inner and outer circumferential sides.

3. The amorphous transformer according to claim 2, characterized in that, The areas with larger iron loss than other parts in the circumferential direction exist on both the inner and outer circumferential sides.

4. The amorphous transformer according to claim 3, characterized in that, The number of regions with larger iron loss than other parts in the circumferential direction is greater on the outer periphery than on the inner periphery.

5. The amorphous transformer according to claim 4, characterized in that, The region with larger iron loss than other parts in the circumferential direction is located on different sides of the inner and outer circumferential sides in the circumferential direction.

6. The amorphous transformer according to claim 5, characterized in that, The region with the largest iron loss compared to other parts of the circumference is located at the edge on the inner circumference and at the corner on the outer circumference.

7. The amorphous transformer according to claim 3, characterized in that, The number of regions with larger iron loss than other parts in the circumferential direction is the same on both the inner and outer circumferential sides, and is located at the edge of the circumferential direction.

8. A method for manufacturing an amorphous transformer, characterized in that, The process includes annealing an amorphous iron core by applying a high frequency, in which an inner support component and an outer support component are used, and a fastening fixture is used to fasten the inner support component and the outer support component in an insulated state. Both the inner support component and the outer support component have non-formed areas, and the inner support component is formed integrally on multiple sides.

9. The method for manufacturing an amorphous transformer according to claim 8, characterized in that, The outer support member is disposed in an area other than the corner or bend, and the inner support member is disposed in an area including the corner or bend.

10. The method for manufacturing an amorphous transformer according to claim 9, characterized in that, There are multiple inner support components.

11. The method for manufacturing an amorphous transformer according to claim 10, characterized in that, There are multiple inner support components, and a support body is arranged between the inner support components.

12. The method for manufacturing an amorphous transformer according to claim 11, characterized in that, The support body and the inner support component are integrated into one unit.

13. The method for manufacturing an amorphous transformer according to claim 8, characterized in that, The outer support member and the inner support member are positioned at a corner or bend.

14. The method for manufacturing an amorphous transformer according to claim 8, characterized in that, The inner support member has a region that protrudes more than the outer support member.

15. The method for manufacturing an amorphous transformer according to claim 14, characterized in that, The protruding area is provided corresponding to the overlapping portion of the amorphous iron core.

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