JPH11144968A - Stacked transformer and metal fittings - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stacked transformer and metal fittings with which the operations of mounting the stacked transformer become easier and the distance between adjacent iron cores is increased. SOLUTION: A unit transformer comprises an iron core 11 and a coil 12. Plural unit transformers are stacked vertically in an outer box structure, such as tank or frame and fixed by metal fittings 21 to form a stacked transformer. The metal fittings 21 are provided with a band supporter 211 for supporting a band 22 wrapped around the iron core 11 of a unit transformer on its vertical part. The direction of the length of the metal fittings 21 and the direction of the length of the band 22 are set so as to be parallel or orthogonal to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stacking transformer and a fixing bracket, and more particularly, to stacking a plurality of unit transformers vertically in an outer box structure such as a tank or a frame by using a fixing bracket. , A fixed stacking transformer and a fixing bracket.

[0002]

2. Description of the Related Art There is a transformer as an electric device for handling electric energy, and a plurality of unit transformers are vertically stacked and fixed in an outer box structure such as a tank or a frame by a fixing bracket. Stacking transformers are known.
FIG. 9 shows an example of a conventional stacking transformer and a fixing bracket. In this stacked transformer, two unit transformers are vertically stacked. FIG. 8 shows an example of the unit transformer used. The unit transformer has an iron core 11 and a winding 12. The stacking transformer uses a fastener 23 'and a fixture 21' in order to vertically stack the unit transformers. Fastener 23
′ Is provided with a hole 231 ′, and the band 22 ′ surrounding the iron core 11 ′ of the unit transformer is passed through the hole 231 ′ to support the band 22 ′ and the iron core 11 ′. The fixture 21 'fixes the fastener 23' with a bolt 24 ', thereby stacking two unit transformers in the vertical direction. Note that the band 22 'is connected to the fastener 23'.
A fastener 221 'is used in order to fix the bracket.

[0003] This stacked transformer requires two kinds of fittings, a fitting 23 'and a fixing fitting 21'. When assembling, first, the iron core 11 'of the unit transformer and the fitting 23' are used.
′ Is fastened by a band 22 ′, and then a two-step operation of attaching the fastener 23 ′ to the fixing bracket 21 ′ is required. Further, the core 11 ′ of the unit transformer used for the stacked transformer is the same as the adjacent core 11 ′.
, And the distance between them is short, which may have an adverse effect such as leakage magnetic flux.

[0004]

SUMMARY OF THE INVENTION The present invention provides a stacking transformer and a metal fitting which can simplify the work for assembling the stacking transformer and can be separated from an adjacent iron core. That is.

[0005]

According to the present invention, there is provided a step-up transformer for vertically stacking and fixing a plurality of unit transformers each composed of an iron core and a coil in an outer box structure such as a tank or a frame by using a fixing bracket. In the container, the fixing bracket is a stacked transformer having a band supporting portion for supporting a band surrounding the iron core of the unit transformer in a vertical portion.

Further, the present invention is a stacked transformer in which the longitudinal direction of the fixing bracket and the longitudinal direction of the band are parallel.

[0007] The present invention is a stacked transformer in which the longitudinal direction of the fixing bracket is orthogonal to the longitudinal direction of the band.

Further, in the present invention, there is provided a step-up transformer in which the band supporting portion of the fixing bracket is a hole.

Further, the present invention is the step-up transformer in which the band supporting portion of the fixing bracket is a cutout portion.

In the present invention, the fixing bracket is a stacked transformer having a seat for mounting an iron core of a unit transformer.

Further, the present invention is the step-up transformer, wherein the fixing bracket has an iron core guide portion for supporting an iron core of the unit transformer.

Further, in the present invention, the fixing bracket is a stacked transformer having a horizontal portion.

Further, the present invention relates to a fixing bracket for vertically stacking a plurality of unit transformers each composed of an iron core and a coil in an outer box structure such as a tank or a frame, and fixing the unit transformers to a fixed stacked transformer. And a fixing member having a band supporting portion for supporting a band circling the iron core of the unit transformer in a vertical portion.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described. Embodiments of a stacked transformer and a fixing bracket according to the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram of a stacked transformer and a fixing bracket according to the first embodiment. FIG. 2 is a diagram illustrating a method of attaching a band in the stacked transformer according to the first embodiment. FIG. 3 is an explanatory diagram of a stacked transformer and a fixing bracket according to a modified example of the first embodiment. FIG. 4 is an explanatory diagram of a stacked transformer and a fixing bracket according to the second embodiment. FIG. 5 is an explanatory diagram of a stacked transformer and a fixture according to a modified example of the second embodiment. FIG.
FIG. 9 is an explanatory diagram of a stacking transformer and a fixture of the third embodiment. FIG. 7 is an explanatory diagram of a stacked transformer and a fixing bracket according to the fourth embodiment. FIG. 8 is an explanatory diagram of a unit transformer used in each embodiment, which is the same as the conventional example. In addition, although each embodiment is described using a two-stage transformer, three or more stages may be used.

The stacking transformer and the mounting bracket of the first embodiment will be described with reference to FIGS. This is an example in which the longitudinal direction of the fixture 21 and the longitudinal direction of the band 22 are parallel. The ends of the cores of the unit transformers 11 are aligned so that the winding axes of the cores 11 are horizontal, and two fixing brackets 21 are arranged in parallel with the outermost peripheral surface of the exposed portion of the core. A plurality of band through-holes 211 are formed in a vertical portion of the fixing bracket 21. As shown in FIG.
11 and then through the gap between the coil 12 and the iron core 11 to make a belt stopper 2
At 21, the iron core 11 of the unit transformer is tightened so as to be pressed by the fixing brackets 21 on both sides to assemble the contents. Since the purpose of the band through-hole 211 of the fixing member 21 is to determine the position of the band 22 passing through the fixing member 21 and to use the band as a band supporting portion,
Depending on the external dimensions of the fixing bracket, a notch 21 having a band width or so may be used instead of the hole 211 as in the fixing bracket shown in FIG.
2, the same function can be achieved. Also, instead of the band through hole 211, a hole formed by attaching a member having a U-shaped cross section to the fixing bracket 21 can be used. As described above, by directly attaching the unit transformer to the fixing bracket 21, a fastener and a mounting bolt are not required, and the positioning of the mounting component and the fixing of the component are simultaneously performed by tightening the band 22. Can be. The core 11 of the unit transformer and the adjacent core 11 do not approach each other because the windings 12 are present therebetween, and are less likely to be adversely affected by leakage magnetic flux or the like.

Embodiment 2 A stacked transformer and a fixture according to a second embodiment will be described with reference to FIGS. 4 and 5. FIG. This is an example in which the longitudinal direction of the fixture 21 is orthogonal to the longitudinal direction of the band 22. The ends of the cores of the unit transformers 11 are vertically aligned so that the winding axes of the cores 11 are vertical, and two fixing brackets 21 are arranged at right angles to the outermost peripheral surface of the exposed portion of the core. The fixture 21 is provided with a plurality of band through holes 211 in a vertical portion thereof, and has a horizontally plate-shaped seat 213. The two ends of the core 11 of the unit transformer with the core winding axis oriented vertically are placed on the seat 213 of the fixture, and the band 22 for fixing the unit transformer in the horizontal direction is fixed to the fixture 2.
1 and around the iron core 11 for tightening and fixing with the belt stopper 221 to assemble the contents. Since the mounting bracket 213 is used, the weight of the unit transformer can be supported. In addition, the band through hole 211 of the fixing metal is not a hole like the fixing metal shown in FIG.
Can also be provided. As described above, by directly attaching the unit transformer to the fixing metal 21, a fastener and a mounting bolt are not required, and by tightening the band 22, the positioning of the mounted component and the fixing of the component can be performed at the same time. Further, the weight of the unit transformer is fixed to the seat 213 of the fixture.
Therefore, the strength required for the band 22 becomes smaller than that of the conventional band, so that a material having a small sectional area and a low material cost can be used.

The step-up transformer and the fixture of the third embodiment will be described with reference to FIG. This is an example in which the longitudinal direction of the fixture 21 and the longitudinal direction of the band 22 are parallel. In the stacked transformer according to the first embodiment, the horizontal parts 215 are provided on the fixing brackets 21 used in two units to integrate them. Further, an iron core guide portion 214 having the width of the iron core 11 is provided. Thereby, the strength of the fixture 21 is increased, and the unit transformer can be supported in the horizontal direction.

Embodiment 4 A stacked transformer and a mounting bracket of Embodiment 4 will be described with reference to FIG. This is an example in which the longitudinal direction of the fixture 21 is orthogonal to the longitudinal direction of the band 22. In the stacking transformer according to the second embodiment described above, the two fixing brackets 21 are provided with a horizontal portion 215 to be integrated. Further, a seat 213 is provided. Thereby, the fixing metal 2
The strength of one can be increased and can support the weight of the unit transformer.

As described above, according to each embodiment, since the unit transformer is directly attached to the fixing bracket 21, the fastener and the mounting bolt are not required, and the structure is simplified.
The material cost is reduced, and the bolt tightening operation during the manufacturing operation is eliminated. In addition, by tightening the band 22, the positioning of the attached component and the fixing of the component can be performed at the same time, so that the manufacturing operation time can be reduced. Then, the number of parts is reduced, and the volume of the entire contents is reduced, so that the size can be reduced compared to the conventional outer box structure. In addition, since there is no protrusion such as a bolt head on the outer peripheral portion of the content assembly, the work of putting the content assembly into the outer box structure becomes easy, and the operation time can be shortened. Furthermore, in the transformer, the natural convection of the insulating oil inside the outer box structure contributes to heat dissipation.However, since obstacles such as fasteners and bolts are eliminated, the natural convection of oil is actively performed and heat dissipation Efficiency is improved. Also, the weight of the unit transformer is
In this case, the band 22 can be prevented from being received, and the strength required for the band 22 is smaller than in the related art. When the iron core guide 214 is provided, the unit transformer can be supported in the horizontal direction.

Although a single-phase transformer has been described as a unit transformer in each embodiment, a multi-phase transformer such as a three-phase transformer can be used.

[0021]

According to the present invention, it is possible to obtain a stacked transformer and a fixing metal which can simplify the work at the time of assembling and can keep a distance from an adjacent iron core.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a stacked transformer and a fixing bracket according to a first embodiment.

FIG. 2 is an explanatory view of a mounting method of a band in the stacked transformer and the fixing bracket of the first embodiment.

FIG. 3 is an explanatory view of a stacked transformer and a fixing bracket according to a modification of the first embodiment.

FIG. 4 is an explanatory diagram of a stacked transformer and a fixing bracket according to a second embodiment.

FIG. 5 is an explanatory diagram of a stacked transformer and a fixing bracket according to a modified example of the second embodiment.

FIG. 6 is an explanatory view of a stacked transformer and a fixing bracket according to a third embodiment.

FIG. 7 is an explanatory view of a stacked transformer and a fixing bracket according to a fourth embodiment.

FIG. 8 is an explanatory diagram of a unit transformer.

FIG. 9 is an explanatory view of a conventional stacked transformer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Iron core 12 Coil 21 Fixing bracket 211 Belt through hole 212 Notch 213 Seat 214 Iron core guide 215 Horizontal part 22 Belt 221 Belt stopper

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoji Matsuda 46, Tomioka, Oji, Nakajo-cho, Kitakanbara-gun, Niigata Prefecture Inside the Industrial Machinery Division, Hitachi, Ltd. 1 Industrial equipment division of Hitachi, Ltd.

Claims (9)

[Claims] 1. A unit transformer comprising an iron core and a coil,
In a stacking transformer for vertically stacking and fixing a plurality of pieces in an outer box structure such as a tank or a frame by a fixing metal, the fixing metal includes a band supporting portion for supporting a band orbiting around an iron core of the unit transformer. A stacked transformer having a vertical portion. 2. The stacked transformer according to claim 1, wherein a longitudinal direction of the fixing bracket and a longitudinal direction of the band are parallel to each other. 3. The stacked transformer according to claim 1, wherein a longitudinal direction of the fixing bracket and a longitudinal direction of the band are orthogonal to each other. 4. The stacked transformer according to claim 1, wherein the band support portion of the fixing bracket is a hole. 5. The stacked transformer according to claim 1, wherein the band support of the fixing bracket is a cutout. 6. The stacked transformer according to claim 1, wherein the fixing bracket has a seat for mounting an iron core of a unit transformer. 7. The stacked transformer according to claim 1, wherein the fixing bracket has an iron core guide portion for supporting an iron core of the unit transformer. vessel. 8. The stacked transformer according to claim 1, wherein the fixing bracket has a horizontal portion. 9. A unit transformer comprising an iron core and a coil,
In the mounting brackets that are vertically stacked in an outer box structure such as a tank or frame and fixed to the stacked transformers, the band support that supports the band orbiting the iron core of the unit transformer is placed in the vertical part. A fixing fitting characterized by having.