JP2022054549A - Three-dimensional iron core transformer - Google Patents

Abstract

To provide a tank structure that allows primary and secondary bushings to be placed on the side plates facing each other on the front and back of a tank in a three-dimensional iron core transformer.SOLUTION: A three-dimensional iron core transformer includes: a transformer content in which three rectangular-frame-shaped single-phase iron cores are arranged in a triangular shape when viewed from above, and coils are respectively arranged in three iron core legs where the two iron cores are combined; and a tank that houses the transformer content and has a substantially hexagonal shape consists of three long sides and three short sides when viewed from above. In the three-dimensional iron core transformer, a width W2 of a back side plate 21d facing a front side plate 21a of the tank among the three long sides and parallel to the side plate 21a is wider than a width W1 of each of side plates 21b which are short sides provided on both sides of the front side plate 21a, and primary bushings (primary terminals) 4 and secondary bushings (secondary terminals) 5 are arranged respectively on the rear side plate 21d and the front side plate 21a of the tank.SELECTED DRAWING: Figure 6

Description

The present invention relates to a tank structure of a three-dimensional iron core transformer.

A three-dimensional iron core is one of the iron core structures used for transformers. The three-dimensional core is composed of three single-phase cores having the same magnetic path length and a rectangular frame shape, and the three single-phase cores are arranged in a triangular shape when viewed from above. The cross-sectional shape of the iron core leg portion formed by combining two single-phase iron cores is substantially circular. A coil is wound around each of the three iron core legs. An example of a three-dimensional core transformer is disclosed in Patent Document 1.

Further, in Patent Document 1, the contents of a transformer composed of a three-dimensional iron core and a coil are arranged in a tank whose cross section is close to a triangle, and is filled with insulating oil, and a heat sink is provided on the side surface of the tank. A three-dimensional iron core transformer provided and provided with a lead wire (terminal) at the upper part of the tank is disclosed (see FIG. 1).

According to the three-dimensional core transformer, the distortion of the magnetic flux waveform generated in each unit iron core becomes smaller, so that the iron loss is reduced as compared with the conventional three-phase three-legged transformer, and the efficiency of the transformer is improved. Can be made to.

Special Table 2013-359215 Gazette

Conventionally, a three-dimensional iron core transformer has a shape of an assembly of an iron core and a coil wound around the iron core, that is, the shape of the contents is generally a triangle, that is, a substantially triangular shape when viewed from the vertical direction. Therefore, the shape of the closed container that covers the contents, that is, the tank, is a substantially triangular shape that is similar to the contents when viewed from the vertical direction, and is viewed from the vertical direction of the entire three-dimensional core transformer including the radiator for cooling. The outer shape is also approximately triangular. In a substantially triangular tank, three corners are cut out, and the cross-sectional shape of the tank side plate when viewed from the vertical direction is composed of three short sides of equal length and three long sides of equal length. A square shape was common, and all the internal angles of the hexagon were constant at 120 °.

In such a three-dimensional core transformer, as seen in FIG. 1 of Patent Document 1, the primary bushing (primary terminal) and the secondary bushing (secondary terminal) for inputting and outputting electric power serve as a lid on the upper part of the tank. The structure to be placed on the cover is common. However, when the primary bushing and the secondary bushing are arranged on the cover, there is a problem that the contents wiring work at the lower part of the cover becomes complicated.

As an example of the arrangement of the primary bushing and the secondary bushing in a general transformer that is not a three-dimensional core transformer, a structure in which the primary bushing or the secondary bushing is arranged on the side plates at parallel positions facing the front and the back of the tank is used. be. However, the conventional three-dimensional core transformer has a constant internal angle of 120 ° when viewed from the vertical direction, and is symmetrical with three long sides of the same length and three short sides of the same length. It is a tank side plate shape that is hexagonal. Therefore, if the primary bushing or secondary bushing is placed on the side plates in parallel positions facing each other, it is necessary to place either the primary bushing or the secondary bushing on the short side, and sufficient installation space is secured depending on the tank size. You will not be able to.

It is an object of the present invention to provide a tank structure capable of arranging a primary bushing and a secondary bushing on side plates at opposite positions corresponding to the front surface and the back surface of a three-dimensional iron core transformer.

To give an example of the "three-dimensional iron core transformer" of the present invention for solving the above problems,
The contents of the transformer and the contents of the transformer, in which three single-phase iron cores in the shape of a rectangular frame are arranged in a triangular shape when viewed from above, and coils are arranged in each of the three iron core legs where the two iron cores are combined. A three-dimensional iron core transformer equipped with a substantially hexagonal tank composed of three long sides and three short sides when viewed from the upper surface, and one of the lengths of the three long sides. The width of the back side plate, which faces the front side plate of the tank corresponding to the side and is parallel to the front side plate of the tank, cuts out the three corners of an equilateral triangle when viewed from the top surface, which houses the contents of the transformer. The hexagonal tank is configured to be wider than the width of the side plate on the back surface facing the side plate on the front surface of the tank, and the primary bushing and the secondary bushing are arranged on the side plate on the front surface of the tank and the side plate on the back surface.

INDUSTRIAL APPLICABILITY According to the present invention, in a three-dimensional iron core transformer, it is possible to provide a tank structure capable of arranging a primary bushing and a secondary bushing on side plates at opposite positions corresponding to the front surface and the back surface of the tank.

In addition, since the primary bushing and the secondary bushing are placed on the side of the tank, the wiring coming out of the coil and the bushing can be connected with the contents of the transformer such as the coil and iron core inside the tank. Workability is improved.

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

It is a perspective view which shows the contents of a three-dimensional iron core transformer. It is a perspective view which shows the three-dimensional iron core of the three-dimensional iron core transformer of FIG. It is a perspective view which shows the three-dimensional iron core transformer of a conventional structure. It is a top view which shows the three-dimensional iron core transformer of a conventional structure. It is a perspective view which shows the three-dimensional iron core transformer of Example 1. FIG. It is a top view which shows the three-dimensional iron core transformer of Example 1. FIG. FIG. 5 is a cross-sectional perspective view of the three-dimensional iron core transformer of FIG. It is sectional drawing of the A plane of the three-dimensional iron core transformer of FIG.

Hereinafter, examples of the present invention will be described with reference to the drawings. The examples are examples for explaining the present invention, and are appropriately omitted and simplified for the sake of clarification of the description. The present invention can also be implemented in various other forms.
In addition, in each figure for demonstrating an embodiment, the same constituent elements are given the same name and reference numeral as much as possible, and the repeated description thereof will be omitted.
The notations such as "first" and "second" in the present specification and the like are attached to identify the components, and do not necessarily limit the number or order.

FIG. 1 shows a perspective view of an example of the contents structure of the three-dimensional core transformer, and FIG. 2 shows a perspective view of the three-dimensional iron core of the three-dimensional core transformer of FIG.

The contents of the three-dimensional iron core transformer are composed of a three-dimensional iron core 11, a coil 12, a lower mounting bracket 14, and an upper mounting bracket 13.

As shown in FIG. 2, the three-dimensional core 11 is composed of three single-phase cores having a rectangular frame shape and the same magnetic path length, and the three single-phase cores are arranged in a triangular shape when viewed from the upper surface, and two of them are arranged. The cross-sectional shape of the iron core leg portion to which the single-phase iron cores of the above are combined is substantially circular. Cylindrical coils 12 are arranged on each of the three iron core legs. Since the cross-sectional shape of the iron core leg portion in which the two single-phase iron cores are combined is substantially circular, the coil 12 has a cylindrical shape.

The lower mounting bracket 14 is attached to the lower side of the three-dimensional iron core 11, and the upper mounting bracket 13 is attached to the upper side. The coil 12 is supported in the vertical direction by a coil support 15 arranged between the lower mounting bracket 14 and the upper mounting bracket 13. Further, the upper mounting bracket 13 and the lower mounting bracket 14 are connected by a mounting bracket connecting stud 16.

In FIG. 1, reference numeral 141 indicates a steady rest guide hole provided in the lower mounting bracket 14, and reference numeral 17 indicates a content fixing bracket provided in the upper mounting bracket 13.

FIG. 3 shows a perspective view of an example of a three-dimensional core transformer having a conventional structure having a primary bushing and a secondary bushing on the upper surface of the cover, and FIG. 4 shows a top view thereof.

The tank 2 for accommodating the contents 1 of the three-dimensional iron core transformer has a hexagonal shape in which the three corners of an equilateral triangle are cut out in the cross-sectional shape when viewed from the vertical direction, and has three long sides 20a and three short sides 20b. I have. A tank radiator 22 is provided on each of the side plates forming the three long sides 20a. Further, a primary bushing (primary terminal) 4 and a secondary bushing (secondary terminal) 5 are arranged on the cover 3 which is a lid on the upper part of the tank. In the figure, reference numeral 25 represents a tank base.

The contents 1 of the three-dimensional core transformer are housed in the tank 2 at predetermined intervals so that the three single-phase iron cores constituting the three-dimensional core 11 are parallel to the three long sides 20a of the tank.

In such a three-dimensional core transformer, the primary bushing and the secondary bushing that input and output electric power are arranged on the cover that becomes the lid on the upper part of the tank, but when the primary bushing and the secondary bushing are arranged on the cover, The contents wiring work at the bottom of the cover becomes complicated.

If you try to place the primary and secondary bushings on the opposite parallel side plates that hit the front and back of the tank, you will need to place either the primary or secondary bushings on the short side, which is sufficient depending on the tank size. It is not possible to secure the installation space for the bushing.

INDUSTRIAL APPLICABILITY In a three-dimensional iron core transformer, the present invention provides a tank structure capable of sufficiently securing an installation space for a primary bushing and a secondary bushing on side plates at opposite positions corresponding to the front surface and the back surface of the tank.

FIG. 5 shows a perspective view of an example of a three-dimensional iron core transformer according to an embodiment of the present invention, and FIG. 6 shows a top view thereof.

In FIG. 6, a tank having an equilateral triangle shape similar to that of the three-dimensional iron core, which houses the contents of the three-dimensional iron core transformer, is shown by a dotted line. The hexagon formed by cutting out the three corners of the equilateral triangle in parallel with the opposite long sides corresponds to the tank of the conventional structure shown in FIGS. 3 and 4. That is, the hexagonal tank in the present invention, which houses the contents of the transformer and has three corners of an equilateral triangle cut out when viewed from the top surface, is the contents of a three-dimensional iron core transformer which is an equilateral triangle shape when viewed from the top surface. It is a hexagonal tank in which three corners of an equilateral triangle viewed from the upper surface are cut out in parallel with the opposite long sides to form short sides.

As shown in FIG. 6, the tank of this embodiment has a long side (first long side) of the tank side plate indicated by reference numeral 21a, and 120 ° on both sides from the first long side indicated by reference numeral 21b. The short side of the tank side plate extending at an angle (first short side), indicated by reference numeral 21c, the long side of the tank side plate extending at an angle of α from the first short side (second long side), indicated by reference numeral 21d. It is composed of the short side (second short side) of the tank side plate which extends from the second long side at an angle of β and is parallel to the first long side. Then, as shown in the figure, the angle α is larger than 120 ° (less than 150 °), and the angle β is smaller than 120 ° (greater than 90 °). Therefore, the width W2 of the short side (second short side 21d) facing and parallel to the first long side 21a is wider than the width W1 of the short side of the conventional structure shown in FIGS. 3 and 4. .. Here, the distance between the first long side 21a and the second short side 21d is equal to the distance between the long side of the conventional structure and the opposite short side.

From the figure, the equilateral triangle-shaped tank that houses the contents of the three-dimensional iron core transformer shown by the dotted line has a side extending from the first long side 21a as one side, and is at an angle of 120 ° from the first long side 21a. It can be said that it is an equilateral triangle in which the two sides of the second short side 21b extending at an angle of α = 120 ° from the end opposite to the first long side are the other two sides.

The primary bushing 4 is attached to the side plate of the tank which is the second short side 21d, and the secondary bushing 5 is attached to the side plate of the tank which is the first long side 21a.

That is, the surface of the side plate on which the primary bushing 4 is arranged (second short side 21d) and the surface of the side plate on which the secondary bushing 5 is arranged (first long side 21a) are in a parallel positional relationship and are primary. It is symmetrical with respect to the vertical plane passing through the center of the two side plates (second short side 21d and first long side 21a) where the bushing 4 and the secondary bushing 5 are arranged, and the secondary bushing 5 is arranged. The angle between the surface of the side plate (first long side 21a) and the two surfaces of the adjacent side plates (first short side 21b) is 120 °, respectively, in a hexagonal shape. The width of the side plate (second short side 21d) on which the primary bushing 4 is arranged is a side that is wider than the width of the short side of the conventional structure and has a longer width.

Further, when the three-dimensional iron core transformer of this embodiment is viewed from another side, it faces the side plate (first long side 21a) which is the long side of the front surface of the tank, and is a short side parallel to the side plate of the front surface of the tank. The width of the back side plate (second short side 21d) is a side plate (first short side) provided at an angle of 120 ° on both sides of the front side plate (first long side 21a) of the tank. It can be said that the width is wider than the width of 21b), and the primary bushing and the secondary bushing are arranged on the front side plate (first long side 21a) and the back side plate (second short side 21d) of the tank. ..

The arrangement of the primary bushing 4 and the secondary bushing 5 may be reversed so that the primary bushing 4 is attached to the first long side 21a side and the secondary bushing 5 is attached to the second short side 21d side. ..

FIG. 7 shows a perspective view of the three-dimensional iron core transformer of FIG. 5 in which a part of the cover 3 and the tank side plate 21 is cut off. Further, FIG. 8 shows a cross-sectional view of the A plane seen from the vertical direction of the three-dimensional core transformer of FIG.

The content 1 of the three-dimensional core transformer is housed in the tank 2 so that one single-phase iron core constituting the three-dimensional core is parallel to the first long side 21a of the tank side plate. Then, the contents are attached to the contents fixing seat 23 of the three tank side plates (two first short sides 21b and widened second short sides 21d) via the contents fixing metal fittings 17 attached to the upper mounting metal fittings 13. Fixing bracket-Fixed with the tank fixing bolt 6. The angles of the two first short sides 21b on both sides of the first long side 21a and the first long side 21a intersect at an angle of 120 °, and the second short side 21d is the first long side. Since the positional relationship is parallel to 21a, the mounting surface of the content fixing bracket 17 and the tank side plate surface are parallel to each other. Further, the tank bottom plate steady rest 24 of the steady rest guide hole 141 is attached to the tank bottom plate to also serve as a vibration stopper for the lower part of the contents and a loosening prevention for the fixing bolt, and has a structure that can withstand vibration and impact during transportation and construction.

According to this embodiment, the width of the back side plate facing the front side plate of the tank is widened so that the primary bushing and the secondary bushing are arranged on the front side plate and the back side plate of the tank. Sufficient space for installing the next bushing can be secured. Then, in a three-dimensional iron core transformer, it is possible to provide a tank structure capable of arranging a primary bushing and a secondary bushing on side plates at opposite positions corresponding to the front surface and the back surface of the tank.

Further, the tank is provided with a side plate to be the first long side on the front surface of the tank, side plates to be the first short side provided on both sides of the first long side at an angle of 120 °, and α from the first short side. It was composed of a side plate as a second long side provided at an angle of (α> 120 °) and a side plate as a second short side provided at an angle of β from the second long side (β <120 °). Therefore, it is possible to arrange the primary bushing and the secondary bushing on the side plate on the front side and the side plate on the back side of the tank while suppressing the expansion of the installation space of the tank.

Further, the two first short sides on both sides of the first long side and the first long side intersect at an angle of 120 °, and the second short side facing the first long side is the first long side. Since the positional relationship is parallel to the sides, the mounting surface of the content fixing bracket 17 and the tank side plate surface are in a parallel relationship, and the contents of the three-dimensional iron core transformer can be easily fixed to the tank.

And since the primary bushing and the secondary bushing are placed on the side of the tank, the connection between the wiring coming out of the coil and the bushing becomes possible with the transformer contents such as the coil and iron core inside the tank, and the contents wiring. Workability is improved.

1 ... Three-dimensional iron core Transformer contents 11 ... Iron core (three-dimensional iron core)
12 ... Coil 13 ... Upper mounting bracket 14 ... Lower mounting bracket 141 ... steady rest guide hole 15 ... Coil support 16 ... Mounting bracket connecting stud 17 ... Contents fixing bracket 2 ... Tank 20 ... Tank side plate 20a of conventional structure ... Tank side plate length Side 20b ... Short side of tank side plate 21 ... Tank side plate 21a of the present invention ... Long side of tank side plate (first long side)
21b ... Short side of tank side plate (first short side)
21c ... Long side of tank side plate (second long side)
21d ... Short side with widened tank side plate (second short side)
22 ... Tank radiator 23 ... Tank content fixing seat 24 ... Tank bottom plate steady rest 25 ... Tank base 3 ... Cover 4 ... Primary bushing (primary terminal)
5 ... Secondary bushing (secondary terminal)
6 ... Contents fixing bracket-Tank fixing bolt

Claims (7)

The contents of the transformer, in which three single-phase iron cores in the shape of a rectangular frame are arranged in a triangular shape when viewed from above, and coils are arranged in each of the three iron core legs where the two iron cores are combined.
A three-dimensional iron core transformer that houses the contents of the transformer and has a substantially hexagonal tank composed of three long sides and three short sides when viewed from above.
The width of the back side plate, which faces the front side plate of the tank corresponding to one of the three long sides and is parallel to the front side plate of the tank, accommodates the contents of the transformer, when viewed from above. The hexagonal tank with the three corners of an equilateral triangle cut out is wider than the width of the side plate on the back facing the side plate on the front of the tank.
A three-dimensional core transformer in which a primary bushing and a secondary bushing are arranged on a side plate on the front surface of the tank and a side plate on the back surface. The contents of the transformer, in which three single-phase iron cores in the shape of a rectangular frame are arranged in a triangular shape when viewed from above, and coils are arranged in each of the three iron core legs where the two iron cores are combined.
A three-dimensional iron core transformer that houses the contents of the transformer and has a substantially hexagonal tank composed of three long sides and three short sides when viewed from above.
The width of the back side plate facing the front side plate of the tank corresponding to one of the three long sides and parallel to the front side plate of the tank is 120 ° on both sides of the front side plate of the tank. It is configured to be wider than the width of the side plate provided at an angle,
A three-dimensional core transformer in which a primary bushing and a secondary bushing are arranged on a side plate on the front surface of the tank and a side plate on the back surface. In the three-dimensional iron core transformer according to claim 1 or 2.
A three-dimensional iron core transformer characterized in that the contents of the transformer are arranged in the tank so that any one of the single-phase iron cores is parallel to the side plate on the front surface of the tank. In the three-dimensional core transformer according to claim 1 or 2.
The tank is provided with a side plate to be the first long side on the front surface of the tank, side plates to be the first short side provided at an angle of 120 ° on both sides of the first long side, and 120 ° from the first short side. It was composed of a side plate that became the second long side provided at an angle of α, which was larger, and a side plate that became a second short side provided at an angle of β, which was smaller than 120 ° from the second long side. A three-dimensional iron core transformer featuring. In the three-dimensional iron core transformer according to claim 1 or 2.
The contents of the transformer are fixed to the tank side plates on three sides with bolts via the contents fixing metal fittings attached to the upper mounting metal fittings.
In the tank, the two first short sides on both sides of the first long side and the first long side intersect at an angle of 120 °, and the second short side facing the first long side is the first. A three-dimensional iron core transformer characterized in that the positional relationship is parallel to the long side of the above, and the mounting surface of the content fixing bracket and the tank side plate surface are in a parallel relationship. In the three-dimensional iron core transformer according to claim 1 or 2.
A three-dimensional iron core transformer characterized in that a tank radiator is arranged on a side plate corresponding to the three long sides. The contents of the transformer, in which three single-phase iron cores in the shape of a rectangular frame are arranged in a triangular shape when viewed from above, and coils are arranged in each of the three iron core legs where the two iron cores are combined.
A three-dimensional iron core transformer that houses the contents of the transformer and has a substantially hexagonal tank composed of three long sides and three short sides when viewed from above.
On one short side of the three short sides facing the side plate of the tank corresponding to one of the three long sides and parallel to the side plate of the tank corresponding to the one long side. The width of the side plate of the corresponding tank faces the side plate of the tank corresponding to one long side of the hexagonal tank that houses the contents of the transformer and has three corners of an equilateral triangle cut out when viewed from above. It is configured to be wider than the width of the side plate of the tank corresponding to one short side.
A three-dimensional core transformer in which a primary bushing and a secondary bushing are arranged on a tank side plate corresponding to the one long side and a tank side plate corresponding to the one short side.

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