JP2003068536A - Board accommodation type transformer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a miniaturized board accommodation type transformer that secures earthquake-resistant strength in a transformer body and does not use any earthquake-resistant fixtures except the transformer body, in a board accommodation type transformer requiring earthquake-resistant strength. SOLUTION: In the board accommodation type transformer that is equipped with a core 2 and a coil 1 that is wound around the core 2, and has earthquake- resistant performance, the core 2 is pressed down by a core presser plate where a core section presser plate 3 and a yoke section presser plate 32 are welded in one piece. The core presser plate has a U-shaped section. The core presser plate is reinforced by a reinforcement stay. The reinforcement stay is welded and fixed to a transformer body base section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a panel storage type transformer, and more particularly, to a panel storage capable of improving the seismic resistant structure of the transformer body, reducing the size of the transformer to be housed, and providing an optimal seismic resistant structure. Form transformer.

[0002]

2. Description of the Related Art In order to make a panel storage type transformer a seismic resistant structure, as in a panel storage type static induction device (Japanese Patent Laid-Open No. 11-87145), a supporting member (seismic bracket) is provided separately from the transformer body. ) Etc. were used to secure seismic strength.
However, in this structure, since the stay is used in addition to the transformer main body, there are problems that the panel size becomes large and the number of man-hours for installing the transformer is long. Further, the use of an iron core retainer plate was proposed in Japanese Patent Laid-Open No. 56-79412, but no consideration was given to an iron core joint portion and the like.

Further, conventionally, as shown in FIG. 7, an iron core 2 '
And a coil 1'wound around the iron core 2 ', in the board storage type transformer, the iron core pressing plate method is such that the iron core 2'is composed of the iron core holding plate 31' and the iron yoke holding plate 32 '. Although it was held, the seismic performance could not be improved because the iron core seam portion 21 'was not held.

[0004]

DISCLOSURE OF THE INVENTION An object of the present invention is to provide a panel storage type transformer that requires seismic strength with a structure in which seismic strength is ensured in the transformer body and seismic metal fittings are not used other than the transformer body. , To provide a compact panel storage transformer.

[0005]

DISCLOSURE OF THE INVENTION The present invention is a panel storage type transformer having an iron core and a coil wound around the iron core, and having seismic resistance. The core holding plate and the yoke holding plate are welded to each other. It is a panel storage type transformer that presses the iron core with the integrated iron core pressing plate.

Further, the present invention is a board storage type transformer in which the iron core pressing plate has a U-shaped cross section.

Further, the present invention is a board storage type transformer in which the iron core pressing plate is reinforced by a reinforcing stay.

Further, the present invention is a board storage type transformer in which the reinforcing stay is welded and fixed to the base portion of the transformer body.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described. An embodiment of the board storage type transformer of the present invention will be described with reference to FIGS. FIG. 1 is an explanatory diagram of an iron core pressing plate of a transformer body according to the first embodiment. FIG. 2 is an explanatory diagram of a cross sectional shape of the transformer core pressing plate according to the second embodiment. FIG. 3 is an explanatory diagram of the cross-sectional shape of the transformer core pressing plate of the third embodiment. FIG. 4 is an explanatory diagram of a cross sectional shape of the transformer core pressing plate according to the fourth embodiment. Figure 5
[Fig. 8] is an explanatory view of a transformer main body base and an iron core retainer plate of Example 5 before assembling the iron core. FIG. 6 is an explanatory view of the transformer main body base and the iron core retainer plate of the fifth embodiment after the iron core is assembled.

The first embodiment will be described. As shown in FIG. 1, the transformer of the present embodiment is a panel storage type transformer having an iron core 2 and a coil 1 wound around the iron core 2 and having seismic resistance, and the iron core pressing plate has a core portion. It comprises a pressing plate 31 and a yoke pressing plate 32, and the core pressing plate 31 and the yoke pressing plate 32 are welded together. Since the core holding plate 31 and the yoke holding plate 4 are integrated by welding, the core seam portion 21 can be surely pressed, and the seismic performance can be improved.

A second embodiment will be described. The transformer of the present embodiment is a modification of the first embodiment, and as shown in FIG. 2, the core holding plate 31b having a U-shaped cross section with respect to the iron core 2.
Is used, the strength of the holding plate member can be reinforced.

Embodiments 3 and 4 will be described. In the transformers of Examples 3 and 4, as shown in FIGS. 3 and 4, respectively, in Example 2, the core pressing plate 31b has a U-shaped cross-section, and the core holding plate 31b further includes Since the reinforcing stay 34 is provided, the strength of the pressing plate member can be further improved. The direction of the reinforcing stay 34 is the coil 1
Direction (see Fig. 3) or parallel direction (Fig. 4)
See).

A fifth embodiment will be described. The transformer of the fifth embodiment is the same as that of the first embodiment as shown before assembling (see FIG. 5) and after assembling (see FIG. 6), respectively, and a core for tightening the core holding plate 31 Section reinforcement stay 34 is welded and fixed to the transformer main body base portion 4, and the iron core 2 is attached to the base portion 4
It is fixed at the time of assembly and integrated with the base portion 4. In addition, FIG.
As shown in (4), the stay 34 is fixed with the studs 5, and the fasteners 6 are attached. As a result, the fixation of the transformer main body base portion and the iron core portion is strengthened, and the seismic performance can be improved.

[0014]

As described above, according to the present invention, in a panel storage type transformer that requires a seismic resistant structure, the seismic resistance is improved, and seismic resistant metal fittings other than the transformer body are not required, and the size reduction is achieved. A board storage type transformer can be obtained.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an iron core holding plate of a transformer body according to a first embodiment.

FIG. 2 is an explanatory view of a cross sectional shape of a transformer core pressing plate according to a second embodiment.

FIG. 3 is an explanatory view of a cross sectional shape of a transformer core pressing plate according to a third embodiment.

FIG. 4 is an explanatory view of a cross sectional shape of a transformer core pressing plate according to a fourth embodiment.

FIG. 5 is an explanatory view of the transformer main body base and the iron core retainer plate of the fifth embodiment before the iron core is assembled.

FIG. 6 is an explanatory diagram of the transformer main body base and the iron core retainer plate of the fifth embodiment after the iron core is assembled.

FIG. 7 is a structural diagram of an iron core retainer plate of a conventional transformer body.

[Explanation of symbols]

1 coil 2 iron core 21 Iron core seam 31 Iron core core retainer plate 31b U-shaped iron core holding plate 32 Iron core yoke retainer plate 33 Iron core retainer plate weld 34 Core part retaining plate reinforcement stay 4 body base 5 Presser plate tightening stud 6 fasteners

Claims (4)

[Claims] 1. A panel storage type transformer having an iron core and a coil wound around the iron core and having seismic resistance, wherein the core holding plate and the yoke holding plate are welded and integrated with each other. A board storage transformer that holds down the iron core. 2. The panel storage type transformer according to claim 1, wherein the iron core retainer plate has a U-shaped cross section. 3. The panel storage type transformer according to claim 1, wherein the iron core pressing plate is reinforced by a reinforcing stay. 4. The panel storage type transformer according to claim 3, wherein the reinforcing stay is welded and fixed to a transformer main body base portion.