Three-phase three-dimensional core and transformer
By using a three-phase three-dimensional iron core structure and mathematical formulas, the problems of difficulty in manufacturing large-size iron cores and low design efficiency in traditional iron cores have been solved, enabling efficient manufacturing and accurate calculation of large-size iron cores.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TBEA INTELLIGENT ELECTRIC CO LTD
- Filing Date
- 2021-06-17
- Publication Date
- 2026-05-29
AI Technical Summary
Traditional iron core manufacturing is difficult in large sizes and has low design and production efficiency, making it impossible to quickly and accurately calculate the cross-sectional area of the iron core column.
A three-phase three-dimensional iron core structure is adopted. The iron core is formed by winding strip into an iron core disc, and the geometric cross-sectional area of the iron core column is calculated by mathematical formula. The actual effective cross-sectional area is optimized by combining adjustment coefficients.
It enables convenient manufacturing of large-size iron cores, improves design and processing efficiency, and makes calculation results more accurate, avoiding errors caused by manual drawing.
Smart Images
Figure CN115497714B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of transformer technology, and in particular to a three-phase three-dimensional iron core and transformer. Background Technology
[0002] Transformers are fundamental equipment for power transmission and distribution, widely used in industry, agriculture, transportation, and urban communities. A transformer is a device that uses the principle of electromagnetic induction to change alternating current voltage. Its main components are coils and an iron core (magnetic core). Its main functions include voltage transformation, current transformation, impedance transformation, isolation, and voltage stabilization (magnetic saturation transformer).
[0003] The transformer core is a crucial component. Traditionally, transformer cores are made by laminating silicon steel sheets. However, due to the limited size of silicon steel sheets, manufacturing large-sized transformer cores is quite difficult. Furthermore, it is impossible to quickly and accurately calculate the cross-sectional area of the core column during the design process, resulting in low design and production efficiency. Summary of the Invention
[0004] Therefore, it is necessary to provide a three-phase three-dimensional iron core and transformer to address the problems of difficulty in manufacturing large-size iron cores and low design and production efficiency.
[0005] A three-phase three-dimensional iron core, comprising three single-frame iron cores connected end to end, the three single-frame iron cores forming a hollow cavity, each single-frame iron core having a window communicating with the hollow cavity, and each pair of adjacent single-frame iron cores connecting to form an iron core column.
[0006] Each of the single-frame iron cores includes a plurality of iron core discs stacked on top of each other along a first direction pointing from the hollow cavity to the window. Each iron core disc is made by winding strip around the first direction. The width of the iron core disc facing the hollow cavity on the cross-section of the iron core column is W1, the width of the strip is B, and the diameter of the iron core column is D.
[0007] when The geometric cross-sectional area S of the iron core column is calculated as follows:
[0008]
[0009] in,
[0010] In the manufacturing process of the aforementioned three-phase solid iron core, iron core discs are first formed by winding strip into core discs. Multiple core discs are then stacked together to form a single-frame iron core. Finally, three single-frame iron cores are joined together to form a three-phase solid iron core. Each core disc is made by winding strip; the more strip wound, the larger the outer circumference of the core disc. Large-sized core discs can be easily manufactured by adjusting the amount of strip wound, thus the core size is not limited and large-sized iron cores can be easily produced.
[0011] Furthermore, during the design of the iron core, when Time (of which) The meaning is to By taking the integer result of the calculation, the geometric cross-sectional area of the core column can be calculated using mathematical formulas, which can then be used to calculate the core cross-sectional fill factor. This eliminates the need for manual drawing and calculation; the geometric cross-sectional area can be obtained simply by plugging the parameters into the formula, significantly improving design and manufacturing efficiency. Furthermore, compared to calculating the geometric cross-sectional area by drawing, mathematical formulas avoid the errors introduced by drawing, resulting in more accurate calculations.
[0012] In one embodiment, when The geometric cross-sectional area S of the iron core column is calculated as follows:
[0013]
[0014] In one embodiment, the effective cross-sectional area of the core post is equal to the adjustment factor multiplied by the geometric cross-sectional area.
[0015] In one embodiment, the adjustment coefficient has a numerical range of 0.85-0.95.
[0016] In one embodiment, the width B of the strip is 10mm-150mm; and / or
[0017] The thickness of the strip is 0.01mm-0.03mm.
[0018] In one embodiment, each of the iron core discs has an inner frame facing the window and an outer frame fitted outside the inner frame;
[0019] In a third direction perpendicular to both the second direction extending from the hollow cavity and the first direction, the inner frame of each core disc has a first inner frame edge, and the outer frame of each core has a first outer frame edge sleeved outside the first inner frame edge. In each single-frame core, the multiple first inner frame edges of the multiple core discs are arranged in a stepped manner, and the multiple first outer frame edges of the multiple core discs in each single-frame core are also arranged in a stepped manner.
[0020] The first inner frame edges of multiple core discs in two adjacent single-frame iron cores enclose a portion of the outer periphery of the iron core column, and the first outer frame edges of multiple core discs in two adjacent single-frame iron cores enclose another portion of the outer periphery of the iron core column.
[0021] In one embodiment, the three single-frame iron cores are joined end-to-end to form three iron core columns, and the three iron core columns have the same geometric cross-sectional area.
[0022] In one embodiment, the strip is an amorphous alloy strip.
[0023] In one embodiment, the single-frame core further includes a reinforcing ring, wherein the reinforcing ring is sleeved on the inner side of the inner frame of each core disc in the single-frame core; and / or
[0024] The reinforcing ring is fitted around the outer side of the outer frame of each core disc in the single-frame core.
[0025] A transformer includes a body, the body comprising a coil and the aforementioned three-phase three-dimensional iron core, the coil being wound on the iron core column. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the structure of a three-phase three-dimensional iron core from one perspective in one embodiment of the present invention;
[0027] Figure 2 for Figure 1 A schematic diagram of the cross-section of the three-phase solid iron core shown;
[0028] Figure 3 for Figure 2 A partially enlarged schematic diagram of the three-phase solid iron core shown;
[0029] Figure 4 for Figure 1 The diagram shows a structural schematic of the three-phase solid iron core from another perspective.
[0030] 100. Three-phase solid iron core; 10. Single-frame iron core; 11. Window; 12. Iron core disc; 13. Strip; 14. Inner frame; 141. First inner frame edge; 143. Second inner frame edge; 16. Outer frame; 161. First outer frame edge; 163. Second outer frame edge; 20. Hollow cavity; 30. Iron core column. Detailed Implementation
[0031] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0032] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0036] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0037] See Figures 1-3 In one embodiment of the present invention, a three-phase three-dimensional iron core 100 is provided. The three-phase three-dimensional iron core 100 includes three single-frame iron cores 10 connected end-to-end, forming a hollow cavity 20 between the three single-frame iron cores 10. Each single-frame iron core 10 has a window 11 communicating with the hollow cavity 20. Every two adjacent single-frame iron cores 10 are connected to form an iron core column 30, which is used for winding coils. Furthermore, each single-frame iron core 10 includes a plurality of iron core cakes 12 stacked together along a first direction pointing from the hollow cavity 20 to the window 11. Each iron core cake 12 is made by winding strip 13 around the first direction. That is, in the process of manufacturing the three-phase three-dimensional iron core 100, iron core cakes 12 are first wound by strip 13, then multiple iron core cakes 12 are stacked together to form a single-frame iron core 10, and finally the three single-frame iron cores 10 are connected to form the three-phase three-dimensional iron core 100. Each iron core disc 12 is made by winding a strip 13. The more turns the strip 13 is wound, the larger the outer circumference of the iron core disc 12. By adjusting the number of turns of the strip 13, large-sized iron core discs 12 can be easily made, and the size of the iron core will not be limited, thus making it convenient to make large-sized iron cores.
[0038] In addition, the core discs 12 in the single-frame core 10 are all square rings. When making the core discs 12, the required square ring shape core 12 can be made by first rolling the circular disc and then shaping the circular disc into a square disc. Alternatively, the required square ring shape core 12 can be made by directly rolling the square disc.
[0039] In some embodiments, the width of the strip 13 is B, the diameter of the core post 30 is D, and the width of one of the multiple core discs 12 facing the hollow cavity 20 on the cross-section of the core post 30 is W1. The geometric cross-sectional area S of the iron core column 30 is calculated as follows:
[0040]
[0041] in,
[0042] This is equivalent to establishing a mathematical formula to sum the cross-sectional areas of all the core laminations in the core column 30 to obtain the geometric cross-sectional area S of the core column 30. During the design of the core, when... Time (of which) The meaning is to The calculation result (rounded to an integer) can be used to calculate the geometric cross-sectional area of the core column 30 using the above formula, which is then used to calculate the core section filling factor. This eliminates the need for manual drawing and calculation; the geometric cross-sectional area can be obtained simply by plugging the parameters into the formula, significantly improving design and manufacturing efficiency. Furthermore, compared to calculating the geometric cross-sectional area by drawing, this formula avoids errors introduced by drawing, resulting in more accurate calculations.
[0043] Specifically,
[0044] Furthermore, when The geometric cross-sectional area S of the iron core column 30 is calculated as follows:
[0045]
[0046] During the design of the iron core, when When calculating the cross-sectional area of the core column 30 using the above formula, the cross-sectional filling coefficient of the core column 30 can be obtained. This eliminates the need for drawing and calculation, making the calculation method simple and accurate, and improving design and production efficiency.
[0047] In some embodiments, the effective cross-sectional area of the core post 30 is equal to the adjustment factor multiplied by the geometric cross-sectional area. In the actual fabrication of the three-phase three-dimensional core 100, the actual effective cross-sectional area of the core post 30 is affected by the lamination and winding processes, and will deviate from the theoretical geometric cross-sectional area. By multiplying by the adjustment factor, the geometric cross-sectional area can be adjusted to obtain the actual effective cross-sectional area, so that the core cross-sectional filling factor calculated subsequently is more accurate.
[0048] Specifically, the adjustment coefficient is equal to the product of the winding coefficient of the core disc 12 and the lamination coefficient of the stacked core discs 12. The winding coefficient is related to parameters such as the tightness of the winding of the strip 13 in the core disc 12, the thickness of the strip 13, and the material of the strip 13. The lamination coefficient is related to parameters such as the tightness of the stacking of the core discs 12. During the core manufacturing process, each core disc 12 is made by winding the strip 13. In the cross-section of the core column 30 formed by stacking multiple core discs 12, the cross-section of each core disc 12 includes multiple layers of strip 13. Factors such as the tightness of the winding of adjacent layers of strip 13 and the tightness of the stacking of multiple core discs 12 will affect the actual effective cross-sectional area. Therefore, multiplying the geometric cross-sectional area S by the adjustment coefficient, which includes the winding coefficient and the lamination coefficient, yields a more accurate effective cross-sectional area, making the subsequently calculated core cross-sectional filling coefficient more accurate.
[0049] Optionally, the adjustment coefficient can be set to a value between 0.85 and 0.95 to obtain a more realistic effective cross-sectional area.
[0050] Alternatively, the width B of the strip 13 can be 10mm-150mm, which can be selected according to the actual design of the iron core. In addition, the thickness of the strip 13 can be 0.01mm-0.03mm, which can also be selected according to the actual design of the iron core.
[0051] See Figure 1 and Figure 4 In some embodiments, the outer periphery of the core post 30 is constructed as a multi-level stepped shape that approaches a circle, making the core post 30 nearly circular, which facilitates the winding of coils on the core post 30.
[0052] Specifically, each core disc 12 has an inner frame 14 facing the window 11 and an outer frame 16 fitted outside the inner frame 14. In other words, each core disc 12 has a through hole, and when multiple core discs 12 are stacked, the through holes of the multiple core discs 12 are connected to form the window 11.
[0053] Furthermore, in a third direction perpendicular to both the second and first directions extending from the hollow cavity 20, the inner frame 14 of each core disc 12 has a first inner frame edge 141, and the outer frame 16 of each core has a first outer frame edge 161 fitted outside the first inner frame edge 141. The multiple first inner frame edges 141 of the multiple core discs 12 in each single-frame core 10 are arranged in a stepped manner, and the multiple first outer frame edges 161 of the multiple core discs 12 in each single-frame core 10 are also arranged in a stepped manner; the multiple core discs of two adjacent single-frame cores 10... The multiple first inner frame edges 141 of the core disc 12 enclose a part of the outer periphery of the iron core column 30, and the multiple first outer frame edges 161 of the multiple core discs 12 in two adjacent single-frame iron cores 10 enclose another part of the outer periphery of the iron core column 30. This is equivalent to the outer periphery of the iron core column 30 being formed by the first inner frame edges 141 and the first outer frame edges 161 of the multiple single-frame iron cores 10 in a stepped manner. By controlling the stepped gradient, that is, the size difference between two adjacent core discs 12, the outer periphery of the entire iron core column 30 can be made to move closer to a circle.
[0054] Understandably, each iron core disc 12 has two sets of first inner frame edges 141 and first outer frame edges 161 distributed on both sides of the window 11 along a third direction. The six sets of first inner frame edges 141 and first outer frame edges 161 in the three single frame iron cores 10 are connected in pairs to form three iron core columns 30.
[0055] Furthermore, along a direction parallel to the second direction, the inner frame 14 of each core disc 12 has a second inner frame edge 143 intersecting with the first inner frame edge 141, and the outer frame 16 of each core disc 12 has a second outer frame edge 163 fitted outside the second inner frame edge 143 and intersecting with the first outer frame edge 161. Each core disc 12 has two sets of second inner frame edges 143 and second outer frame edges 163 distributed on both sides of the window 11 along a direction parallel to the second direction. The multiple second inner frame edges 143 of the multiple core discs 12 in the single-frame core 10 are arranged flush, or the multiple second inner frame edges 143 are constructed to be arranged in an arc shape that bends away from the window 11 along a direction parallel to the second direction. The resulting core inner frame bends away from the window 11 or is horizontal, making the window 11 space larger, facilitating the winding of more coils, increasing the winding space, and reducing the overall height of the core.
[0056] In some embodiments, three single-frame iron cores 10 are joined end-to-end to form three iron core pillars 30, and the three iron core pillars 30 have the same geometric cross-sectional area. The structure formed by the three single-frame iron cores 10 joined end-to-end is similar to a triangular frame, with three iron core pillars 30 and the three iron core pillars 30 having the same cross-sectional area, which facilitates design and assembly.
[0057] In some embodiments, the strip 13 is an amorphous alloy strip 13, such as an iron-based amorphous alloy strip, which has high saturation magnetic induction intensity and is superior to silicon steel sheets in terms of magnetic permeability, excitation current and iron loss.
[0058] In some embodiments, the single-frame core 10 further includes reinforcing rings (not shown). A reinforcing ring is fitted inside the inner frame 14 of each core lamination in the single-frame core 10, and / or a reinforcing ring is fitted outside the outer frame 16 of each core disc 12 in the single-frame core 10. Because the core disc 12 is formed by winding amorphous strip 13, its strength is relatively low. The overall strength of the core disc 12 can be improved by fitting reinforcing rings at the inner frame 14 and outer frame 16. Optionally, the reinforcing rings are made of silicon steel strip, which is stronger than the amorphous alloy strip 13 and can protect the amorphous alloy strip 13 wound inside the core disc 12.
[0059] In the process of manufacturing the aforementioned three-phase three-dimensional iron core 100, iron core discs 12 are first formed by winding strip 13, and then multiple iron core discs 12 are stacked together to form a single-frame iron core 10. Finally, three single-frame iron cores 10 are joined together to form the three-phase three-dimensional iron core 100. Each iron core disc 12 is formed by winding strip 13, and the more strip 13 is wound, the larger the outer circumference of the iron core disc 12. By adjusting the amount of strip 13 wound, large-sized iron core discs 12 can be easily manufactured, and the iron core size is not limited, thus facilitating the manufacture of large-sized iron cores.
[0060] Furthermore, during the design of the iron core, when Time (of which) The meaning is to By taking the integer result of the calculation, the geometric cross-sectional area of the core column 30 can be calculated using mathematical formulas, which can then be used to calculate the core cross-sectional filling factor. This eliminates the need for manual drawing and calculation; the geometric cross-sectional area can be obtained simply by plugging the parameters into the formula, significantly improving design and manufacturing efficiency. Furthermore, compared to calculating the geometric cross-sectional area by drawing, mathematical formulas avoid errors introduced by drawing, resulting in more accurate calculations.
[0061] In some embodiments, the present invention also provides a transformer, the transformer including a transformer body, the transformer body including coils and the aforementioned three-phase three-dimensional iron core 100, the iron core column 30 of the three-phase three-dimensional iron core 100 having coils wound on it, and adjusting various characteristics of the current by electromagnetic induction between the current inside the coils and the three-phase three-dimensional iron core 100.
[0062] The three-phase three-dimensional iron core 100 includes three single-frame iron cores 10 connected end-to-end, forming a hollow cavity 20. Each single-frame iron core 10 has a window 11 communicating with the hollow cavity 20. Every two adjacent single-frame iron cores 10 are connected to form an iron core column 30, which is used for winding coils. Furthermore, each single-frame iron core 10 includes multiple iron core cakes 12 stacked together along a first direction pointing from the hollow cavity 20 to the window 11. Each iron core cake 12 is made by winding strip 13 around the first direction. That is, in the process of manufacturing the three-phase three-dimensional iron core 100, iron core cakes 12 are first wound from strip 13, then multiple iron core cakes 12 are stacked together to form a single-frame iron core 10, and finally the three single-frame iron cores 10 are connected to form the three-phase three-dimensional iron core 100. Each iron core disc 12 is made by winding a strip 13. The more strip 13 is wound, the larger the outer circumference of the iron core disc 12. Large iron core discs 12 can be easily made by adjusting the amount of strip 13 wound, and the size of the iron core is not limited, thus making it convenient to make large iron cores.
[0063] In some embodiments, the width of the strip 13 is B, the diameter of the core post 30 is D, and the width of one of the multiple core discs 12 facing the hollow cavity 20 on the cross-section of the core post 30 is W1. The geometric cross-sectional area S of the iron core column 30 is calculated as follows:
[0064]
[0065] in,
[0066] This is equivalent to establishing a mathematical formula to sum the cross-sectional areas of all the core laminations in the core column 30 to obtain the geometric cross-sectional area S of the core column 30. During the design of the core, when... Time (of which) The meaning is to The calculation result (rounded to an integer) can be used to calculate the geometric cross-sectional area of the core column 30 using the above formula, which is then used to calculate the core section filling factor. This eliminates the need for manual drawing and calculation; the geometric cross-sectional area can be obtained simply by plugging the parameters into the formula, significantly improving design and manufacturing efficiency. Furthermore, compared to calculating the geometric cross-sectional area by drawing, this formula avoids errors introduced by drawing, resulting in more accurate calculations.
[0067] Specifically,
[0068] Furthermore, when The geometric cross-sectional area S of the iron core column 30 is calculated as follows:
[0069]
[0070] During the design of the iron core, when When calculating the cross-sectional area of the core column 30 using the above formula, the cross-sectional filling coefficient of the core column 30 can be obtained. This eliminates the need for drawing and calculation, making the calculation method simple and accurate, and improving design and production efficiency.
[0071] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0072] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.
Claims
1. A three-phase three-dimensional iron core, characterized in that, The three-phase three-dimensional iron core includes three single-frame iron cores that are connected end to end to each other. The three single-frame iron cores are surrounded to form a hollow cavity. Each single-frame iron core has a window that communicates with the hollow cavity. Every two adjacent single-frame iron cores are connected to form an iron core column. Each of the single-frame iron cores includes a plurality of iron core discs stacked on top of each other along a first direction pointing from the hollow cavity to the window. Each iron core disc is made by winding strip around the first direction. The width of the iron core disc facing the hollow cavity on the cross-section of the iron core column is W1, the width of the strip is B, and the diameter of the iron core column is D. when The geometric cross-sectional area S of the iron core column is calculated as follows: in, The meaning is to The calculation result is taken as an integer.
2. The three-phase three-dimensional iron core according to claim 1, characterized in that, when The geometric cross-sectional area S of the iron core column is calculated as follows:
3. The three-phase three-dimensional iron core according to claim 1 or 2, characterized in that, The effective cross-sectional area of the core column is equal to the adjustment coefficient multiplied by the geometric cross-sectional area.
4. The three-phase three-dimensional iron core according to claim 3, characterized in that, The adjustment coefficient has a numerical range of 0.85-0.
95.
5. The three-phase three-dimensional iron core according to claim 1 or 2, characterized in that, The width B of the strip is 10mm-150mm; and / or The thickness of the strip is 0.01mm-0.03mm.
6. The three-phase three-dimensional iron core according to claim 1 or 2, characterized in that, Each of the iron core discs has an inner frame facing the window and an outer frame fitted outside the inner frame; In a third direction perpendicular to both the second direction extending from the hollow cavity and the first direction, the inner frame of each core disc has a first inner frame edge, and the outer frame of each core has a first outer frame edge sleeved outside the first inner frame edge. In each single-frame core, the multiple first inner frame edges of the multiple core discs are arranged in a stepped manner, and the multiple first outer frame edges of the multiple core discs in each single-frame core are also arranged in a stepped manner. The first inner frame edges of multiple core discs in two adjacent single-frame iron cores enclose a portion of the outer periphery of the iron core column, and the first outer frame edges of multiple core discs in two adjacent single-frame iron cores enclose another portion of the outer periphery of the iron core column.
7. The three-phase three-dimensional iron core according to claim 1 or 2, characterized in that, The three single-frame iron cores are joined end to end to form three iron core columns, and the three iron core columns have the same geometric cross-sectional area.
8. The three-phase three-dimensional iron core according to claim 6, characterized in that, The strip is an amorphous alloy strip.
9. The three-phase three-dimensional iron core according to claim 8, characterized in that, The single-frame iron core further includes reinforcing rings, and the reinforcing rings are sleeved on the inner side of the inner frame of each iron core disc in the single-frame iron core; and / or The reinforcing ring is fitted around the outer side of the outer frame of each core disc in the single-frame core.
10. A transformer, characterized in that, The device includes a body, which includes a coil and a three-phase three-dimensional iron core as described in any one of claims 1-9, with the coil wound on the iron core column.