JP2012009486A - Stacked transformer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stacked transformer which reduces a heat generation amount of an upper transformer with a simple structure and improves heat transfer performance by forming a new heat radiation path of the upper transformer.SOLUTION: The stacked transformer includes: multiple first members 11 provided in the height direction in a container 13; multiple second members 10 provided at different height positions between intermediate parts of the multiple first members; multiple transformers 3 fixed and supported by the multiple second members 10 and placed in the height direction; and third members 15, each of which extends from an upper position of each first member 11 in the horizontal direction and is fixed to a side wall of the container 13.

Description

  The present invention relates to a stacking transformer, and more particularly to a stacking transformer in which a plurality of unit transformers using wound cores are stacked and fixed in a container in a vertical direction by a connecting metal fitting.

  For example, Patent Documents 1 and 2 are known as stacked transformers in which a plurality of unit transformers using wound cores are stacked and fixed in a container in a vertical direction by a connecting metal fitting.

  In the unit transformers of Patent Documents 1 and 2, first, a belt-shaped magnetic thin steel plate is overwrapped to form a quadrangular annular core having four arcs, and a winding is attached to the wound core. An upper part and a lower part of the wound core are fastened and supported by an upper fastening bracket and a lower fastening bracket.

  In addition, the stacking transformer uses a connecting bracket in addition to the upper and lower fastening brackets in order to stack the unit transformers in the vertical direction. The connecting metal fittings are fastened with bolts, whereby a plurality of unit transformers are stacked in the vertical direction. Further, the connecting metal fitting is fixed to the side wall of the stacked transformer storage container. The stacking transformer storage container is filled with an insulating cooling medium such as mineral oil, and the stacking transformer storage container is sealed with a cover.

  If the capacity (ie, size) of multiple unit transformers stored in the stacked transformer storage container is different, a large unit transformer is installed in the lower stage and its lower clamp is fixed to the bottom of the container. In general, a small unit transformer is arranged on the upper stage.

JP-A-8-130122 Japanese Patent Laid-Open No. 11-144968

Each unit transformer configured as described above generates heat from a transformer body composed of a wound core and a winding during operation. In order to cool this, there are a path through the cooling medium and a path not through the cooling medium. Of these, the former route through the cooling medium uses convection by the cooling medium and radiates heat through the following two routes.
P1: Winding-> cooling medium->container-> outside air P2: Winding-> winding core-> cooling medium->container-> outside air On the other hand, in the latter route not passing through the cooling medium, heat is transmitted by heat conduction. This path is different for the lower and upper transformers,
P3: Winding → Winding core → Lower clamp bracket → Vessel bottom → Outside air, In the upper transformer,
P4: Winding → winding iron core → lower fastening metal fitting → lower transformer winding iron core or connecting metal fitting → lower transformer lower fastening metal fitting → bottom bottom → outside air.

  The upper and lower unit transformers in the stacking transformer storage container are cooled by the above paths, and the cooling performance in each path is verified as follows.

  Lower transformer: The heat radiation paths P1 and P2 are paths that are cooled by natural convection in which the cooling medium that has fallen down to the lower part of the container is heated by natural convection with its density decreasing while taking heat from the windings and the wound core. . In the path P3, since the lower fastening bracket that supports the wound core is in direct contact with the bottom of the container, heat is easily escaped by heat conduction.

  Upper transformer: The paths P1 and P2 take heat at the lower transformer and rise in temperature, and the heat is taken away and cooled by the cooling medium that has gone down to the upper transformer as the density decreases. For this reason, in the upper stage transformer, the cooling performance by natural convection is reduced by the amount of increase in the temperature of the cooling medium in the lower stage transformer. The heat dissipation path P4 by heat conduction passes through the wound core of the lower transformer or the connecting metal fitting more than the lower transformer, although heat is transferred from the lower clamp to the bottom of the container. As the heat is transmitted, the temperature rises and the cooling performance deteriorates.

  This means that the cooling of the upper transformer is worse than that of the lower transformer in all of the heat radiation paths P1, P2, and P4, and there is a problem that the temperature of the winding and the wound iron core is increased.

  In view of the above, an object of the present invention is to provide a stacked transformer that can improve heat transfer performance by forming a new heat dissipation path of the upper transformer with a simple configuration.

  In order to achieve the above object, the stacked transformer of the present invention is provided at different height positions between a plurality of first members provided in a height direction in a container and intermediate portions of the plurality of first members. A plurality of second members formed, a plurality of transformers in the height direction supported and fixed to the plurality of second members, and a third extending horizontally from the top of the first member and fixed to the side wall of the container. It consists of members.

  The upper part of the first member and the third member that extends in the horizontal direction and is fixed to the side wall of the container are preferably provided to be inclined toward the container side.

  Of the plurality of transformers in the height direction, the first member, the third member, and a part of the second member that are located above the upper part of the upper transformer are the first member, After the transformer is fixedly arranged using the second member, it may be installed.

  The transformer is a unit transformer composed of a square annular wound core formed by wrapping a strip-shaped magnetic thin steel sheet and a winding attached to the wound core, and a plurality of first transformers. It is good to clamp | tighten and arrange to the said wound iron core by the member of 2. FIG.

  Further, the first member, the second member, and the third member are formed of steel plates, and heat generated by the transformer is transferred from the second member to the upper portion of the container via the first member and the third member. Good.

  In order to achieve the above object, the stacked transformer according to the present invention includes a plurality of connecting brackets provided in the height direction inside the stacking transformer storage container and different heights between intermediate portions of the plurality of connecting brackets. The lower and upper clamps provided at the position, the multiple transformers provided between the lower and upper clamps, and the horizontal extension from the upper part of the connection brackets are fixed to the side walls of the stacked transformer storage container. It is comprised from the fixed member made.

  The connecting bracket and the lower and upper clamping brackets are formed of steel plates, and the width of the coupling bracket is approximately the same as the width dimension of the upper clamping bracket of the upper transformer, and the container for housing the stacked transformers. It is good to fix so that the substantially whole surface of the fixing member of the flat plate fixed to the side wall may be in close contact with a part of the connecting metal fitting.

  In addition, the connecting bracket, the lower and upper clamping brackets, and the fixing member are formed of steel plates, and the transformer is attached to the wound core with a square annular wound core formed by wrapping a strip of magnetic thin steel plate. A unit transformer composed of a plurality of windings, stacked and fixed in a vertical direction in a container by connecting metal fittings, and deformed by an upper fastening metal fitting that supports the wound core of the upper transformer. It is preferable to provide an anti-deformation preventing member and fix the steel plate fixed to the side wall of the container accommodating the stacking transformer so that the substantially entire surface of the fixing member and the surface bent in the vertical direction of the anti-deformation member are in close contact with each other. .

  As described above, according to the present invention, it is possible to obtain a stacked transformer capable of improving the heat transfer performance by forming a new heat dissipation path of the upper transformer with a simple configuration.

The figure which shows the vertical schematic side surface of the stacked transformer by 1st Embodiment. The top view of FIG. The figure which shows the three-dimensional structure of the upper part of the stacking transformer by 1st Embodiment. The figure which shows the vertical outline side surface of the stacked transformer by 2nd Embodiment. The top view of FIG. The figure which shows the vertical outline side surface of the stacked transformer by 3rd Embodiment. The top view of FIG. The figure which shows the three-dimensional structure of the upper part of the stacking transformer by 3rd Embodiment. The figure which shows the vertical schematic side surface of the stacked transformer by 4th Embodiment. FIG. 10 is a plan view of FIG. 9. The figure which shows the vertical outline side surface of the stacked transformer by 5th Embodiment. The top view of FIG. The figure which shows the plane of the stacked transformer by 6th Embodiment. The figure which shows the plane of the stacked transformer by 7th Embodiment.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a stacked transformer according to the present invention will be described below based on the transformer shown in the drawings.

  FIG. 1 is a longitudinal schematic side view of the stacked transformer according to the first embodiment, FIG. 2 is a plan view thereof, and FIG. 3 is a three-dimensional structure of the upper portion of the stacked transformer.

  First, in FIG. 1, for example, at least one set of two metal fittings 11 is installed in the height direction inside a cylindrical stacked transformer storage container 13. Further, between the pair of connecting metal fittings 11, lower and upper fastening metal fittings 9 and 10 for fixing the lower transformer 2 and the upper transformer 3 in the vertical direction are arranged in the horizontal direction and fixed by bolts 12. Is done.

  Here, the lower transformer 2 and the upper transformer 3, which are unit transformers stacked in the vertical direction, are a rectangular annular wound iron core 4 in which four corners are formed in an arc shape by overlappingly winding strip-like magnetic thin steel plates. A transformer main body 6 composed of a winding 5 attached to the wound iron core 4 is provided. In addition, the lower and upper fastening brackets 9 and 10 have a role of holding the wound cores 4 of the unit transformers 2 and 3 from above and below, in addition to the role of stacking and fixing.

  The stacking transformer 1 includes a container 13 that houses the lower transformer 2 and the upper transformer 3 and is filled with an insulating cooling medium such as mineral oil, and a cover (not shown) that seals the container 13. .

  In the stacked transformer 1 of the present embodiment configured as described above, the purpose is to effectively dissipate heat from the upper transformer 3 in particular. The fixing member 15 is installed on the upper part, for example, by bolting. The mounting position of the fixing member 15 is set above the upper fastening fitting 10 of the upper transformer 3.

  As apparent from the plan view of FIG. 2, the connection fitting 11 is provided extending vertically in the container 13, whereas the fixing member 15 attached to the connection fitting 11 is provided at the upper part of the upper transformer 3. It extends in the horizontal direction at a position above the clamp 10 and comes into contact with the cylindrical container 13.

  As is apparent from FIG. 3 showing the three-dimensional configuration of the upper part in the container, the stacked transformer 1 of the present invention includes a plurality of connecting fittings 11 provided in the height direction inside the stacked transformer storage container 13, and a plurality of connecting brackets 11. Of the lower and upper clamping brackets 9 and 10 provided at different height positions between the intermediate portions of the coupling bracket 11, the transformer provided between the lower and upper clamping brackets 9 and 10, It is composed of a fixing member 15 extending in the horizontal direction from the top and fixed to the side wall of the stacked transformer storage container 13.

  The present invention basically has the above-described configuration. To express this more simply, a plurality of first members provided in the height direction in the container, and intermediate portions of the plurality of first members A plurality of second members provided at different height positions, a plurality of height transformers supported and fixed to the plurality of second members, and extending horizontally from the top of the first member. And a third member fixed to the side wall of the container. In the present invention, each member of the first member, the second member, and the third member only needs to have such a functional part, and when the apparatus is actually configured, parts are prepared for each of these member units. It goes without saying that any combination of components is possible to realize such a part.

  Thus, the heat generated in the transformer can be transferred and dissipated through the path of the second member, the first member, the third member, the container, and the outside air, and the cooling of the upper-stage transformer, especially the stacking transformer, is effective. Can be done automatically.

  In the following description, several embodiments variously devised from the viewpoints of workability and workability when configuring the stacked transformer having the above basic configuration will be described. First, in the first embodiment described with reference to FIGS. 1, 2, and 3, the following is preferable.

  In the first embodiment, the connecting fitting 11 has a width dimension L2 that is substantially the same as the width direction dimension L1 of the upper fastening fitting 10 of the upper transformer 3. Further, the connecting metal 11 is fastened to the both ends of the upper fastening metal 10 in the longitudinal direction by bending the upper fastening metal 10 bent downward and the bolts 12, so that the almost entire surface of the bent metal 14 is obtained. And the upper clamp 10 is fixed.

  The fixing member 15 is formed of a steel plate having a vertical surface that is in contact with the entire surface above the upper fastening metal fitting 10 of the upper transformer 3 in the height direction of the coupling metal 11, and the portion of the steel plate that contacts the side wall of the container 13 is It is fixed by welding.

  2 or 3, the wound iron core 4 is tightened so that a tightening band 7 is wound around the outer periphery so that no gap is generated in the stacking direction of the magnetic steel sheets. The wound iron core 4 has a lower flat portion placed on the lower clamp 9 via an insulating material (not shown), and the upper flat portion is supported by the upper clamp 10 via an insulating material (not shown). Yes. In addition, 7S is a fastener of the fastening band 7, and 10A and 10B are openings.

  According to the present embodiment, heat transfer from the upper transformer 3 where heat dissipation was insufficient is performed as follows. First, in the same manner as described above, P1: winding 5 → cooling medium → container 13 → outside air, P2: winding 5 → winding iron core 4 → cooling medium → container 13 → outside air, P4: Winding 5 → winding iron core 4 → lower clamp metal fitting 9 → lower transformer winding iron core 4 or connecting metal fitting 11 → lower transformer lower clamping metal fitting → bottom of container 13 → outside air.

  On the other hand, in this embodiment, a new heat dissipation path is formed. That is, in FIG. 3, the upper fastening fitting 10 that is almost entirely in contact with the flat portion at the top of the wound iron core 4, and the substantially entire folding portion 14 that is bent downward at both longitudinal ends of the upper fastening fitting 10. Further, since the fixing member 15 that is in close contact with the entire surface above the upper fastening fitting 10 of the connection fitting 11 is fixed to the side wall of the container 13, P5: Winding 5 → A new heat dissipation path is formed: the wound core 4 → the upper fastening fitting 10 → the connecting fitting 11 → the fixing member 15 → the container 13 → the outside air.

  Thus, the heat transfer performance of the heat generated from the transformer main body 6 (the wound core 4 and the winding 5) of the upper transformer 3 can be improved by adding a new heat radiation path.

  In addition, if necessary, by selecting an insulating material having a high thermal conductivity or a thickness of an insulating material interposed between the flat portion at the top of the wound core 4 and the upper fastening fitting 10, the heat transfer performance can be further improved. Can be improved.

  Next, a second embodiment of the stacked transformer according to the present invention will be described based on the transformer shown in FIGS. The same reference numerals as those in FIGS. 1, 2 and 3 denote the same constituent members, so that detailed description thereof will be omitted, and the modified points will be mainly described.

  In the present embodiment, the configuration different from that of the first embodiment (FIGS. 1, 2, and 3) is that the connecting bracket 11 is inclined obliquely above the upper fastening bracket 10 in the height direction, and the connecting brackets 11 are connected to each other. In other words, the fixing member 15 has the same inclination as that of the connection fitting 11.

  According to the above configuration, the same effects as those of the first embodiment can be obtained, and the connecting metal 11 and the fixing member 15 above the upper fastening metal 10 have the same inclination. The contact between the connecting fitting 11 and the fixing member 15 is improved, and the heat transfer performance of the heat radiation path from the connecting fitting 11 via the fixing member 15 is further improved. Can be improved.

  Further, since the fixing members 15 spread upward, the work of assembling the lower-stage transformer 2 and the upper-stage transformer 3 integrated with the connecting fitting 11 in the container 13 is facilitated.

  FIG.6 and FIG.7 is the figure of the vertical cross section schematic and plane of a transformer which shows 3rd Embodiment of the stacked transformer by this invention. FIG. 8 shows a three-dimensional configuration of the upper part of the stacking transformer in the present embodiment. The same reference numerals as those in FIGS. 1, 2 and 3 denote the same constituent members, so that detailed description thereof will be omitted, and the modified points will be mainly described.

  In particular, as shown in FIG. 8, the connection fitting 11 according to the present embodiment has an upper end in the vertical direction equal to or lower than the height of the upper fastening fitting 10 of the upper transformer 3. In this case, the width dimension L2 of the connection fitting 11 does not have to be substantially the same as the width direction dimension L1 of the upper fastening fitting 10 of the upper transformer 3, and the lower and upper fastening fittings 9, 10 are fixed by the bolts 12. The width is sufficient.

  Further, as shown in the right side of FIG. 8 by cutting out only the upper clamping metal 10 and the wound core 4, the upper clamping metal 10 of the upper transformer 3 is substantially equal to the width-direction dimension L3 of the flat portion on the upper part of the wound iron core 4. It has flat portions having the same width dimension L1, and has leg portions 10L bent downward from both ends in the width direction of the flat portions. In addition, the steel plate is formed in a U-shaped cross-section with the opening facing downward and the opening width equivalent to the width of the wound core 4, and the flat portion of the upper clamp 10 is crimped to the flat portion at the top of the wound core 4. Has been. Then, two openings 10A and 10B are formed in the flat portion of the upper clamp 10 so that the tightening band 7 located on the flat portion of the upper portion of the wound core 4 and its stopper 7S can be tightened together with the wound core 4. Yes.

  On the upper clamp 10, a deformation preventing member 16 is integrally attached by known fastening means such as a bolt 17. The deformation preventing member 16 has a flat portion having substantially the same dimension L4 as the flat portion of the upper fastening fitting 10, and both are in close contact with each other by fastening means. Of course, an opening 16M is formed in the flat portion at the same position as the upper fastening fitting 10 so as not to interfere with the fastening band 7 and its stopper 7S. In addition, the deformation preventing member 16 is formed with bent portions 18 that are bent upward at both ends in the longitudinal direction of the flat portion along the winding direction of the wound iron core 4. It is connected and fixed to the fixing member 15 by known fastening means.

  The fixing member 15 is formed of a steel plate having a vertical surface that contacts the entire surface of the bent portion 18 in the extending direction, and a portion of the steel plate that contacts the side wall of the container 13 is fixed by welding or the like.

  In the case of this embodiment, the first member in the height direction in the basic idea of the present invention is constituted by a connecting metal fitting, a height direction portion (bending portion 18) of the deformation preventing member 16, and the like. It can be understood that the uppermost part is realized by the deformation preventing member 16 and the upper fastening bracket 10. As described above, each member in the basic idea of the present invention may be achieved by various parts for realizing this function.

  According to the present embodiment, in the upper transformer 3, the upper fastening fitting 10 and the deformation preventing member 16 are fixed in close contact over substantially the entire width of the upper fastening fitting 10, so that the strength is one. It can be handled as a single plate, and the upper clamp 10 can be prevented from being easily deformed. That is, the upper fastening bracket 10 has the right and left leg portions 10L bent downward and has a reinforcing rib function, and the rigidity is increased by adding the plate thickness of the deformation preventing member 16, so that the bending force acting in the longitudinal direction is prevented. Deformation can be suppressed.

  Further, with respect to the bending stress in the width direction, the deformation can be suppressed by adding the plate thickness of the deformation preventing member 16 and the reinforcing rib function of the bent portion 18 of the deformation preventing member 16. As a result, the wound core 4 of the upper transformer 3 is firmly supported in the container 13 by the upper fastening fitting 10 and the deformation preventing member 16, so that the wound core 4 is not only transported but also short-circuited or excited. Can be prevented from being deformed or displaced due to external force. Therefore, no-load loss due to deformation of the wound core 4 can be reduced, and the amount of heat generated by the wound core 4 due to the no-load loss can be reduced.

  Furthermore, a new heat radiation path is also formed in this embodiment. That is, there is an upper fastening bracket 10 that is almost entirely in contact with the flat portion at the top of the wound iron core 4 and a deformation preventing member 16 that has a flat portion that is almost entirely in contact with the flat portion of the upper fastening fitting 10. In addition, since the amount of heat of the wound core 4 proportional to the contact area between these two flat portions can be transmitted, a new heat dissipation path for transmitting heat from these to the container 13 via the fixing member 15 and dissipating heat to the outside air is provided. It is formed.

  In this way, the heat generation from the transformer body 6 (the wound core 4 and the winding 5) of the upper transformer 3 is reduced, and the heat transfer performance is improved by adding a new heat radiation path of the upper transformer 3. Can do.

  According to this embodiment, the structure composed of the deformation preventing member 16 and the fixing member 15 is separately installed after the transformer main body (comprising the transformer, the connecting member, and the upper and lower clamps) is stored in the container 13. Therefore, the effect on manufacturing and installation is great.

  9 and 10 are transformers showing a fourth embodiment of the stacked transformer according to the present invention. The same reference numerals as those in FIGS. 6, 7 and 8 denote the same constituent members, so detailed description thereof will be omitted, and the modified points will be mainly described.

  In the present embodiment, the configuration different from that of the third embodiment (FIGS. 6, 7 and 8) is that each of the upper fastening fitting 10 and the deformation preventing member 16 has a characteristic as shown in FIG. Further, two openings 16A and 16B are opened, the fastening band 7 is passed through the openings 16A and 16B, the upper iron fitting 10 and the deformation preventing member 16 are tightened together with the wound iron core 4, and fixed with a stopper 7S. .

  According to the above configuration, the same effect as that of the third embodiment can be obtained, and the upper fastening fitting 10 and the deformation preventing member 16 are fastened together with the wound core 4, so that the wound core 4 is more firmly fixed. As a result, heat generation of the wound core 4 due to no-load loss can be further suppressed. Of course, when the upper clamp 10 and the deformation prevention member 16 are fastened together to the wound iron core 4, the degree of adhesion between the deformation prevention member 16 and the upper clamp 10 and the wound iron core 4 is further improved, and the deformation prevention member. The heat transfer performance of the heat dissipation path via 16 can be further improved.

  11 and 12 are transformers showing a fifth embodiment according to the present invention. As in the past, the same reference numerals indicate the same constituent members, so detailed description thereof will be omitted, and the modified points will be mainly described.

  In the present embodiment, the configuration different from the fourth embodiment is that the upper fastening fitting 10 is also used as the deformation preventing member 20.

  That is, the deformation preventing member 20 according to the present embodiment has a flat portion having substantially the same dimension as the width direction of the flat portion on the upper part of the wound core 4, and is bent downward from both ends in the width direction of the flat portion. And a bent portion 22 in which both ends in the longitudinal direction of the flat portion are bent upward.

  However, since the upper clamp 10 is also used as the deformation preventing member 20, the bent portions 14 that are bent downward cannot be formed at both longitudinal ends of the upper clamp 10. Therefore, the connecting fitting 11 is extended in the height direction above the flat portion of the deformation preventing member 20 and fastened with the bent portion 22 of the deformation preventing member 20 and the bolt 12, and the deformation preventing member 20 is fixed to the connecting fitting 11. . In addition, the lower end of the fixing member 15 is shifted upward so that the connecting member 11 extends upward so as not to overlap the connecting member 11.

  With this configuration, in the deformation preventing member 20, the leg portion 21 exhibits a reinforcing rib function with respect to a bending stress in the longitudinal direction, and the bending portion 22 functions as a reinforcing rib function with respect to a bending stress in the width direction. Therefore, it is possible to prevent the wound core 4 from receiving or shifting from the external force. As a result, the no-load loss due to the deformation of the wound core 4 can be reduced, and the amount of heat generated by the wound core 4 due to the no-load loss can be reduced. Therefore, the present embodiment can provide the same effects as those of the above embodiments.

  Furthermore, since the deformation preventing member 20 also serves as the upper clamp 10, the number of parts can be reduced, and the heat of the wound core 4 can be directly transmitted to the deformation preventing member 20. It is possible to further improve the heat transfer performance of the heat dissipation path.

  According to this embodiment, since the deformation preventing member 20 can be formed by bending a plate material, the effect in terms of workability is great.

  FIG. 13 is a transformer showing a sixth embodiment according to the present invention. In these drawings, since the same reference numerals indicate the same components, detailed description thereof will be omitted, and the modified points will be mainly described.

  In the present embodiment, a different configuration from the third embodiment is that the space formed by the container 13 and the fixing member 15 in the third embodiment is a solid fixing member 23. The fixing member 23 is fixed to the inner peripheral wall of the container 13 by known fixing means such as welding.

  With this configuration, the same effect as that of the third embodiment can be obtained, and heat transferred from the wound iron core 4 through the upper fastening fitting 10 and the deformation preventing member 16 to the container 13 can be transferred. Since the area can be increased, the heat transfer performance can be further improved.

  FIG. 14 is a transformer showing a seventh embodiment according to the present invention. Since the same reference numerals indicate the same constituent members, detailed description thereof is omitted.

  In the present embodiment, the configuration different from the third embodiment is that the entire surface of the bent portion 18 of the deformation preventing member 16 is fixed in a state where the entire surface is in contact with the container 13 in the third embodiment. For this purpose, the container 13 has a flat wall 24 formed at a position opposite to the longitudinal direction of the upper clamp 10 and the deformation preventing member 16, and the deformation preventing member 16 is fixed to the flat wall 24 by known fixing means such as welding. The bent portion 18 is fixed.

  As shown in FIG. 14, as a well-known fixing means, when the bent portion 18 is fixed to the flat wall 24 using the bolt 19, a bolt through hole must be formed in the flat wall 24. However, when the bolt through hole is formed, it is conceivable that an insulating cooling medium such as mineral oil filled in the container 13 leaks from the bolt through hole. In such a case, leakage of the insulating cooling medium can be prevented by fixing the cap nut 25 to the outside of the container 13 by welding.

  By configuring in this way, the same effects as in the sixth embodiment can be obtained.

  By the way, about the heat dissipation countermeasure illustrated by each above-mentioned embodiment, although you may employ | adopt independently, it can employ | adopt in combination. By combining a plurality of measures, the cooling efficiency of the stacked transformer can be further improved.

  Moreover, although the container 13 in each embodiment is cylindrical, it does not necessarily need to be cylindrical and the same effect can be obtained even with a container such as a rectangular parallelepiped.

  According to the present invention, the amount of heat generated by the upper transformer can be reduced with a simple configuration, and the heat transfer performance can be improved by forming a new heat dissipation path of the upper transformer.

  As described above, in the stacked transformer according to the present invention, the cooling efficiency can be improved by changing the internal structure without changing the appearance structure of the transformer, and the present invention can be used. The nature is high.

DESCRIPTION OF SYMBOLS 1 ... Stacking transformer 2 ... Lower stage transformer 3 ... Upper stage transformer 4 ... Winding iron core 5 ... Winding 6 ... Transformer main body 7 ... Fastening band 7S ... Stopper 9 ... Lower clamp 10 ... Upper clamp 10A, 10B , 16A, 16B, 16M ... opening 11 ... coupling metal 12, 17, 19 ... bolt 13 ... container 14, 18, 22 ... bent portion 15, 23 ... fixing member 16, 20 ... deformation preventing member 21, 10L ... leg 24 ... Flat wall 25 ... Cap nut

Claims (8)

  A plurality of first members provided in the container in the height direction, a plurality of second members provided at different height positions between intermediate portions of the plurality of first members, and the plurality of second members A stacking transformer comprising a plurality of transformers in the height direction supported and fixed to the first member and a third member extending in the horizontal direction from the top of the first member and fixed to the side wall of the container. In the stacked transformer described in item 1,
The upper part of a 1st member and the 3rd member extended in a horizontal direction from here and being fixed to the side wall of a container are inclined and provided in the container side, The stacking transformer characterized by the above-mentioned. In the stacked transformer described in item 1,
Among the plurality of transformers in the height direction, the first member, the third member, and a part of the second member, which are located above the upper part of the upper transformer, are the first member, A stacked transformer, wherein the transformer is installed after the transformer is fixedly arranged using the second member. In the stacked transformer described in item 1,
The transformer is a unit transformer composed of a quadrangular annular wound core formed by wrapping a strip-shaped magnetic thin steel plate and a winding attached to the wound core, and the plurality of second transformers. 2. A stacked transformer, wherein the stacked transformer is fixedly disposed by being fastened to the wound iron core by two members. In the stacked transformer according to any one of Items 1 to 4,
The first member, the second member, and the third member are formed of a steel plate, and heat generated by a transformer is transferred from the second member to the upper portion of the container via the first member and the third member. A stacking transformer characterized by damaging.   Multiple fittings provided in the height direction inside the stacked transformer storage container, lower and upper fastening fittings provided at different height positions between the intermediate portions of the plurality of coupling fittings, and lower and upper fastenings A stacking transformer comprising a plurality of transformers provided between the metal fittings and a fixing member extending in the horizontal direction from the upper portion of the connecting metal fitting and fixed to the side wall of the stacking transformer storage container. In the stacked transformer according to item 6,
The connecting bracket, the lower and upper clamping brackets are formed of steel plates, and the width of the coupling bracket is substantially the same as the width dimension of the upper clamping bracket of the upper transformer, and a container that accommodates the stacked transformer A stacked transformer, wherein the flat plate fixing member fixed to the side wall of the flat plate is fixed so that almost the entire surface of the fixing member is in close contact with the flat plate fixing member. In the stacked transformer according to item 6,
The connecting metal fitting, the lower and upper fastening metal fittings, and the fixing member are formed of a steel plate, and the transformer is attached to the wound iron core with a rectangular annular wound iron core formed by overlapping and winding a strip-shaped magnetic thin steel plate. A unit transformer composed of a plurality of windings, stacked in a vertical direction in a container by the connecting metal fittings, fixed, and deformed by the upper fastening metal fittings that support the winding core of the upper transformer. A deformation preventing member that suppresses the deformation, and is fixed so that the substantially entire surface of the fixing member of the steel plate fixed to the side wall of the container accommodating the stacking transformer is in close contact with the surface of the deformation preventing member that is bent in the vertical direction. Stacking transformer characterized by.

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