JP2019029436A - Transformer - Google Patents

Abstract

To provide a transformer that prevents iron cores from being applied with a load and that is excellent in earthquake resistance.SOLUTION: A transformer at least has a plurality of coils 1, a plurality of iron cores 2, and reinforcement metal fittings 3 penetrating through inner peripheries of the coils 1. Each reinforcement metal fitting 3 has two flanges and one web connecting between the two flanges, and has an H-shaped cross section. The iron cores 2 are respectively inserted into two rectangular spaces formed by the flanges and the webs of the reinforcement metal fittings 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a transformer.

  An earthquake-resistant structural transformer is described in Patent Document 1. In this Patent Document 1, “the transformer main body placed on the base is incorporated in a base frame and an earthquake-resistant frame gantry which is configured separately from the transformer main body at the end stays provided at both ends and extending upward. It is fixed, and each end stay of the frame base for earthquake-proofing supports both ends in the longitudinal direction of the upper fastener of the corresponding transformer body. "

JP-A-56-23722

  In the earthquake-resistant structural transformer of Patent Document 1, an earthquake-resistant reinforcing member is arranged separately from the transformer main body. However, with this structure, the horizontal displacement of the coil due to seismic vibration or the like is suppressed by the iron core. Due to the movement of the coil in the horizontal direction, a load is applied to the iron core, causing deformation of the iron core and deterioration of characteristics.

  The transformer which concerns on one Embodiment of this invention has a some coil, a some iron core, and the reinforcement metal fitting which penetrates the inner periphery of a coil at least. The reinforcing metal fitting is a metal fitting having an H-shaped cross section having two flanges and one web connecting the two flanges, and the iron core is formed by the flange and the web of the reinforcing metal fitting. It is characterized by being inserted into each of the two rectangular spaces.

  ADVANTAGE OF THE INVENTION According to this invention, the transformer which is not loaded on an iron core and is excellent in earthquake resistance is provided. Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is a perspective view of the content structure of the transformer which concerns on Example 1. FIG. It is a component expanded view of a transformer content structure. It is the upper surface schematic diagram for a coil monopod. It is a figure which shows the example of the assembly procedure of a transformer. It is the schematic of the bottom face of the transformer of Example 1 in the state before iron core insertion. It is the upper surface schematic diagram for the coil monopod of the transformer which concerns on Example 2. FIG.

  Hereinafter, examples will be described with reference to the drawings.

  First, a three-phase transformer according to the first embodiment (hereinafter sometimes simply referred to as “transformer”) will be described with reference to FIGS. 1, 2, and 3.

  FIG. 1 is a perspective view of a content structure of a transformer according to the present embodiment, and FIG. 2 is an exploded view of components of FIG. FIG. 3 is a schematic view of the coil monopod viewed from above. The transformer includes three coils 1 and four iron cores 2, a reinforcing metal fitting 3, an upper holding metal fitting 4 </ b> A, a lower holding metal fitting 4 </ b> B, a vertical metal fitting 5 and a transition metal fitting 6.

  Note that there are a plurality of coils 1, iron cores 2, reinforcing metal fittings 3, upper holding metal fittings 4 </ b> A, lower holding metal fittings 4 </ b> B, vertical metal fittings 5, and transition metal fittings 6. Therefore, for example, when a specific coil 1 among a plurality of coils 1 is described, as shown in FIG. 2, a reference having subscripts such as “−1”, “−2”, “−3”, etc. A code (reference code such as “1-1”) is used. When a common matter is described for the coil 1-1, the coil 1-2, and the coil 1-3, a reference symbol without a suffix (that is, “1”) is used. Similarly, for the iron core 2, the reinforcing metal fitting 3, the upper holding metal fitting 4A, the lower holding metal fitting 4B, and the transition metal fitting 6, when a specific one part is described, a reference with a subscript such as "-1" is attached. A number is used. Further, the transformer according to the present embodiment has eight vertical metal fittings 5. When specifying each vertical metal fitting 5, “a”, “b”, “c”, “d”, “ Reference numerals with subscripts “e”, “f”, “g”, “h” are used.

  Further, as shown in FIG. 1, in the three-phase transformer, a plurality of (three) coils 1 are arranged in one direction. In this embodiment, the direction in which the plurality of coils 1 are arranged is referred to as “longitudinal direction” or “X direction”, and the vertical direction is referred to as “height direction” or “Z direction”. A direction orthogonal to the X direction and the Z direction is referred to as a “width direction” or a “Y direction”. In addition, the X direction or the Y direction may be referred to as a “horizontal direction”.

  The reinforcing metal fitting 3 is a metal fitting provided for each coil 1 and penetrates the hollow portion inside the coil 1 in the Z direction. Further, the upper end and the lower end of the reinforcing metal fitting 3 protrude from the end face of the coil 1. The upper end of the reinforcing metal fitting 3 is connected to the central portion of the upper presser fitting 4A, and the lower end of the reinforcing metal fitting 3 is connected to the central portion of the lower presser fitting 4B. In the present embodiment, the upper presser fitting 4A and the lower presser fitting 4B are collectively referred to as “upper and lower presser fitting 4”.

  The upper presser bracket 4A and the lower presser bracket 4B are brackets for pressing the upper end and lower end of the coil 1, respectively, thereby suppressing the electric wire in the coil 1 from popping out due to the short-circuit mechanical force in the Z direction when the transformer is short-circuited. doing. In addition to this, the upper presser fitting 4 </ b> A and the lower presser fitting 4 </ b> B also serve to connect the reinforcing bracket 3 and the vertical bracket 5 (fix the reinforcing bracket 3 to the vertical bracket 5).

  The vertical bracket 5 is a support column of the transformer, and is provided at a position outside the outer periphery of each coil 1. As shown in FIGS. 1 and 2, in the transformer according to the present embodiment, a plurality (eight) of vertical metal fittings 5 (5a to 5h) are provided on both sides. Vertical metal fittings 5a, 5b, 5c, 5d are provided on one side of the transformer, and vertical metal fittings 5e, 5f, 5g, 5h are provided on the other side of the transformer. In the present embodiment, the surface on which the vertical metal fittings 5a to 5d are arranged is called a “first side surface” of the transformer, and the surface on which the vertical metal fittings 5e to 5h are arranged is called a “second side surface” of the transformer. And the 1st side surface and 2nd side surface of a transformer may be named generically, and it may call the "side surface" of a transformer. The interval (width) between the first side surface and the second side surface is larger than the width (length in the Y direction) of the coil 1.

  The vertical metal fitting 5 has a length (height) equivalent to that of the reinforcing metal fitting 3, and ends of the upper presser fitting 4 </ b> A and the lower presser fitting 4 </ b> B are connected to the upper part and the lower part, respectively.

  In the transformer according to the present embodiment, both ends of each upper presser fitting 4A (or lower presser fitting 4B) are connected to different vertical brackets 5, respectively. For example, the upper presser fitting 4A-1 and the lower presser fitting 4B-1 are connected to the vertical fittings 5a and 5b. Of the vertical metal fittings 5, the vertical metal fitting 5b is connected to the two upper holding metal fittings 4A-1 and 4A-2 and the two lower holding metal fittings 4B-1 and 4B-2, and the vertical metal fitting 5c is connected to the two upper holding metal fittings 4A. -2, 4A-3 and two lower presser fittings 4B-2, 4B-3. Similarly, the vertical metal fitting 5f is connected to the two upper presser fittings 4A-4 and 4A-5 and the two lower presser fittings 4B-4 and 4B-5, and the vertical metal fitting 5g is connected to the two upper presser fittings 4A-5 and 4A-. 6 and two lower presser fittings 4B-5 and 4B-6. As a result, each of the reinforcing metal fittings 3 penetrating the two adjacent coils 1 is fixed by being connected to a common (identical) vertical metal fitting 5 via the upper and lower presser fittings 4. Therefore, each reinforcing metal fitting 3 is fixed so as not to move independently.

  The vertical bracket 5 is connected to a transition bracket 6 for connecting a plurality of vertical brackets 5. The transition metal fittings 6 are provided on the upper and lower parts of each vertical metal fitting 5. In the example of FIG. 1, the upper portions of the vertical brackets 5a, 5b, 5c, and 5d are connected to the transition bracket 6-1 and the lower portions of the vertical brackets 5a, 5b, 5c, and 5d are connected to the transition bracket 6-2. . And the upper part of the vertical metal fittings 5e, 5f, 5g, 5h is connected to the crossover metal fitting 6-3, and the lower part of the vertical metal fittings 5e, 5f, 5g, 5h is connected to the crossover metal fitting 6-4. With this structure, the position of the reinforcing metal fitting 3 is more securely fixed, so that the reinforcing metal fitting 3 serves as a stopper, and the coil 1 through which the reinforcing metal fitting 3 penetrates does not move in the horizontal direction due to seismic vibration or the like, improving the earthquake resistance.

  As described above, the upper presser fittings 4A-1, 4A-2, 4A-3 and the lower presser fittings 4B-1, 4B-2, 4B-3 are mutually connected via the vertical brackets 5 (5b and 5c). The upper presser brackets 4A-4, 4A-5, 4A-6 and the lower presser brackets 4B-4, 4B-5, 4B-6 are connected to each other via the vertical brackets 5 (5f, 5g). Yes. Therefore, when the upper and lower presser fittings 4 have sufficient strength against horizontal movement, the transition fittings 6 can be omitted or reduced.

  Next, the structure of the reinforcing metal fitting 3 and the state when the reinforcing metal fitting 3 is inserted into the coil 1 will be described with reference to FIG. As shown in FIG. 3, the reinforcing metal fitting 3 is an H-shaped metal fitting made up of two flanges 3A and a web 3B connecting the two flanges 3A. The coil 1 is formed by winding a conductor such as a copper wire one or more times in the same manner as that used in a known transformer. The inside of the coil 1 is hollow so that the iron core 2 and the reinforcing metal fitting 3 can be inserted. In addition, the conductor is not directly exposed on the inner wall of the coil 1, and an insulator such as a bobbin is provided. Abbreviated.

  The shape of the inner peripheral cross section of the coil 1 in the transformer according to the present embodiment is substantially rectangular. In this embodiment, the length of the side in the X direction of the inner peripheral cross section of the coil 1 is referred to as “X dimension”, and the Y direction The length of the side is called “Y dimension”. The width (length in the X direction) of the flange 3A of the reinforcing bracket 3 is equivalent to the X dimension inside the coil 1, while the width of the web 3B (the length in the Y direction) of the reinforcing bracket 3 is equal to the Y dimension inside the coil. It is. Since the reinforcing metal fitting 3 is an H-shaped metal fitting, two rectangular spaces are formed between the two flanges 3A. Hereinafter, the length of the space in the X direction (referred to as “height”) is referred to as “h”, and the length in the Y direction (referred to as [width]) is referred to as “w”.

  Since the dimension of the inner peripheral cross section of the coil 1 is designed to be equal to the dimension of the reinforcing metal fitting 3 (the length of the flange 3A and the web 3B), when the reinforcing metal fitting 3 is passed through the inside of the coil 1, at least The outer surface of the two flanges 3 </ b> A (the surface opposite to the surface on which the web 3 </ b> B exists) contacts the inner wall of the coil 1. Thereby, the coil 1 can be fixed from the inside while improving the strength in both the X direction and the Y direction, and the seismic performance is enhanced. Further, since the movement of the coil in the horizontal direction is suppressed by the reinforcing metal fitting 3, no load is applied to the iron core 2, and deformation and deterioration of characteristics of the iron core 2 can be suppressed. In particular, a large effect can be obtained in an amorphous transformer in which the iron core is soft and the characteristics are likely to deteriorate due to the load.

  Note that which part of the reinforcing metal fitting 3 contacts the inner wall of the coil 1 depends on the cross-sectional shape of the inner wall of the coil 1. For example, when the cross-sectional shape of the inner wall of the coil 1 is a substantially rectangular shape, the entire outer surface of the two flanges 3 </ b> A (the surface opposite to the surface on which the web 3 </ b> B is present) contacts the inner wall of the coil 1. However, the cross-sectional shape of the inner wall of the coil 1 may be, for example, an elliptical shape. In this case, the reinforcing metal fitting 3 and the inner wall of the coil 1 (the inner wall of the coil 1 are arranged so that each end of the flange 3A contacts the inner wall of the coil 1. Is preferably designed because the coil 1 can be fixed.

  The width of the iron core 2 is smaller than the width w of the rectangular space in the reinforcing metal fitting 3, and the thickness of the iron core 2 is smaller than the height h of the rectangular space in the reinforcing metal fitting 3. Thus, the iron core 2 can be inserted into each of the two rectangular spaces in the reinforcing metal fitting 3. When two iron cores are inserted inside the coil 1 (rectangular space in the reinforcing metal fitting 3), the web 3B is positioned so as to pass between the two iron cores 2. Therefore, the reinforcing metal fitting 3 can be projected from the end face of the coil 1 without interfering with the iron core 2. Using the protruding portion of the reinforcing metal fitting 3, the reinforcing metal fitting 3 can be connected to the vertical metal fitting 5 via the upper and lower pressing metal fittings 4.

  By arranging the vertical metal fitting 5 outside the outer shape of the coil and connecting the upper and lower pressing metal fittings 4 to this, it is possible to secure a lead-out space for line wires and tap wires coming out of the coil.

  FIG. 4 shows an example of an assembly procedure of the transformer according to this embodiment.

  (A) First, the reinforcing metal fitting 3 and the vertical metal fitting 5 are connected via the lower holding metal fitting 4B. The connection method of the reinforcing metal fitting 3, the lower holding metal fitting 4B, and the vertical metal fitting 5 may be any method as long as the strength is ensured. For example, welding may be used, and each metal fitting may be connected by a bolt. Then, after the reinforcing metal fitting 3, the lower holding metal fitting 4B, and the vertical metal fitting 5 are connected, the coil 1 is inserted into the reinforcing metal fitting 3.

  (B) Subsequently, the upper presser fitting 4A is connected to the upper portion of the reinforcing fixture 3, specifically to the portion protruding from the upper end of the coil 1, and the upper presser fitting 4A and the vertical bracket 5 are connected. The upper presser fitting 4 </ b> A is attached so as to contact the upper end of the coil 1. Thereby, the upper end and the lower end of the coil 1 are respectively pressed by the upper presser fitting 4A and the lower presser fitting 4B, and the coil 1 can be prevented from being detached from the reinforcing metal fixture 3. Furthermore, the cross-over metal fitting 6 is attached to the vertical metal fitting 5 (specifically, the cross-over metal fitting 6-1 is provided above the vertical metal fittings 5a, 5b, 5c, 5d, and the cross-over metal fitting is provided below the vertical metal fittings 5a, 5b, 5c, 5d. 6-2 is attached to the upper part of the vertical brackets 5e, 5f, 5g, and 5h, and the transition bracket 6-4 is attached to the lower part of the vertical brackets 5e, 5f, 5g, and 5h). However, when the strength of the upper and lower presser fitting 4 is sufficient, it is not necessary to attach the transition metal fitting 6.

  (C) Next, the iron core 2 is inserted into the inner periphery of the coil 1. Since this is a known process, the details are omitted, but at this point, the iron core 2 is not in an annular shape as shown in FIG. is there. Here, the iron core 2 is U-shaped, and the end of the iron core 2 is inserted into the coil 1 from above.

  (D) Subsequently, the transformer is turned down so that the bottom of the transformer faces sideways. And the junction part (end parts) of the iron core 2 is joined, and the iron core 2 is made cyclic | annular.

  (E) Finally, the transformer is awakened to complete the assembly of the transformer.

  As described above, when the contents of the transformer are laid down or raised during the assembly process, the coil 1 is fixed and protected by metal fittings, and no special equipment or jig is required.

  FIG. 5 is a schematic front view (that is, a schematic diagram of the bottom surface) when the transformer before inserting the iron core of the present embodiment is laid down sideways. In the case of the transformer according to the present embodiment, when the transformer is tilted sideways, the weight of the coil 1 is received from the inside by the reinforcing metal fitting 3 and the vertical metal fitting 5 that supports the reinforcing metal fitting 3 via the upper and lower pressing metal fittings 4. Since the crossover metal 6 is located outside the outer shape of the coil 1, the coil 1 is not in contact with the floor surface, and it is possible to prevent deformation of the coil 1 and damage to the outer layer. Since the coil 1 is protected from the outside even when it is tilted sideways, even a large model can perform iron core wrapping work in a sideways state. Further, the coil and the metal fitting can be transported in the state shown in FIG. 5, and the coil 1 and the iron core can be disassembled and transported and assembled on site.

  FIG. 6 is a schematic view of a coil monopod of the transformer according to the second embodiment as viewed from above. The transformer according to the second embodiment includes a reinforcing metal fitting 3 'instead of the reinforcing metal fitting 3 described in the first embodiment. The reinforcing metal fitting 3 'has two flanges 3A and one web 3B orthogonal to the flanges 3A as in the case of the reinforcing metal fitting 3, and further, the reinforcing metal fitting 3' is orthogonal to the web 3B at the central portion of the web 3B. An X-direction support portion 3C is provided. The length of the X direction support portion 3C is equal to the flange 3A. Four rectangular spaces are formed inside the reinforcing metal fitting 3 'by the two flanges 3A, the X-direction support portion 3C, and the web 3B. In the transformer according to the second embodiment, four (two rows) iron cores 2 (2a, 2b, 2c, 2d) are inserted into one coil 1 so that the iron core 2 and the X-direction support portion 3C do not interfere with each other. It is the composition which becomes. The reinforcing metal fitting 3 ′ used in the transformer according to the second embodiment is obtained by adding the X-direction support portion 3 </ b> C to the reinforcing metal fitting 3 described in the first embodiment, so that it is possible to obtain further strength in the X direction. . The central part of the coil 1 is the place where the buckling to the inside of the coil 1 due to the mechanical force generated at the time of short circuit is the largest. In the reinforcing metal fitting 3 ′ according to the present embodiment, this buckling can be suppressed by the X direction support portion 3 </ b> C, so that the short circuit strength is improved.

  The structure of the transformer according to the second embodiment is the same as that of the first embodiment except that four iron cores are inserted into one coil and the structure of the reinforcing metal fitting 3 ′ is different from the reinforcing metal fitting 3 in the first embodiment. 1 is the same as that shown in FIG. 1 and the like. Moreover, the manufacturing method (assembly method) of the transformer which concerns on Example 2 is the same as that of what was demonstrated in Example 1, and is assembled in the procedure shown by FIG.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, in the above embodiment, the example in which both ends of the upper presser fitting 4A (or the lower presser fitting 4B) are connected to different vertical brackets 5 is described. A structure in which the upper presser fitting 4A (or the lower presser fitting 4B) is connected to only one vertical bracket 5 may be employed. In this case, the number of the vertical metal fittings 5 may be the same as the number of the upper presser fittings 4A (or the lower presser fittings 4B) (that is, six).

  The number of the vertical brackets 5 is six (hereinafter, the reference numerals of the respective vertical brackets 5 are “5′-1,” “5′-2,” “5′-3,” “5′-4,” “ 5′-5 ”and“ 5′-6 ”, vertical metal fittings 5′-1, 5′-2, 5′-3 are arranged on the first side surface of the transformer, and vertical metal fittings 5′-4 on the second side surface. , 5'-5, 5'-6), in the case where the upper and lower presser fittings 4 are connected to only one vertical bracket 5, respectively, the upper presser fittings 4A-1, 4A-2, 4A-3 (and lower presser fittings 4B-1, 4B-2, 4B-3) are connected to the vertical brackets 5'-1, 5'-2, 5'-3, respectively, and the upper presser fittings 4A-4, 4A-5, 4A-6 (and lower presser fittings 4B-4, 4B-5, 4B-6) are connected to the vertical brackets 5'-4, 5'-5, 5'-6, respectively. May be. When the strength (rigidity) of the upper and lower presser fitting 4 is sufficient, even in such a structure, the movement of the coil 1 in the horizontal direction can be suppressed.

DESCRIPTION OF SYMBOLS 1 ... Coil, 2 ... Iron core, 3 ... Reinforcement metal fitting, 4A ... Upper presser fitting, 4B ... Lower presser fitting, 5 ... Vertical metal fitting, 6 ... Transition metal fitting

Claims (8)

A plurality of coils;
With multiple iron cores,
A reinforcing metal fitting penetrating the inner periphery of the coil,
The reinforcing metal fitting has two flanges and one web connecting the flanges, and the metal fitting having a H-shaped cross section,
The iron core is inserted into each of two rectangular spaces formed by the flange and the web of the reinforcing metal fitting,
A transformer characterized by that. The flange of the reinforcing fitting penetrating the coil is in contact with the inner wall of the coil;
The transformer according to claim 1, wherein: A plurality of support columns are provided on the side surface of the transformer,
The upper part of the reinforcing bracket protrudes from the upper end of the coil,
The lower part of the reinforcing bracket protrudes from the lower end of the coil,
The reinforcing bracket is fixed to the support via an upper presser fitting attached to an upper portion of the reinforcing fixture and a lower presser fitting attached to a lower portion of the reinforcing bracket.
The transformer according to claim 2, wherein: Each of the upper presser fitting and the lower presser fitting is attached to the reinforcing bracket,
One of the upper presser fittings and one of the lower presser fittings attached to the reinforcing brackets are connected to the support provided on one side of the transformer,
The other upper holding metal fitting and the other lower holding metal fitting attached to the reinforcing metal fitting are connected to the column provided on the other side surface of the transformer,
The transformer according to claim 3, wherein: Each of the upper presser fitting and the lower presser fitting can be connected to two struts,
The upper pressing metal fitting attached to the reinforcing metal fitting that penetrates the first coil that is one of the plurality of coils, and the reinforcing metal fitting that penetrates the second coil adjacent to the first coil The upper presser fitting attached to the same is connected to the same strut,
The lower presser fitting attached to the reinforcing metal fitting penetrating the first coil and the lower presser fitting attached to the reinforcing metal fitting penetrating the second coil are connected to the same column. ,
The transformer according to claim 4, wherein: The upper and lower ends of the coil are supported by the upper presser fitting and the lower presser fitting,
The transformer according to any one of claims 3 to 5, characterized by the above. The reinforcing bracket is further provided with a support portion having a length equal to the flange at a central portion of the web so as to be orthogonal to the web.
The iron core is inserted into each of four rectangular spaces formed by the flange, the support portion, and the web of the reinforcing metal fitting, according to any one of claims 3 to 6. The described transformer. The method for manufacturing a transformer according to any one of claims 3 to 7, wherein the manufacturing method includes:
Connecting the lower part of the reinforcing bracket and the lower part of the support column via the lower presser bracket,
Inserting the coil into the reinforcing bracket;
Connecting the upper presser fitting to the upper part of the reinforcing metal fitting and the upper part of the column;
Inserting the iron core inside the coil;
The manufacturing method of a transformer characterized by having.

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