KR20170072073A - Power transformer - Google Patents

Abstract

The present invention provides a power transformer. The power transformer includes an iron core portion having a winding support portion formed at a center thereof; A winding portion provided on the winding supporting portion; A support portion disposed along the rim of the iron core portion and supporting the iron core portion; And a flux path guide portion installed in the support portion and guiding a leakage magnetic flux path generated from the winding portion toward the iron core portion.

Description

[0001] POWER TRANSFORMER [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transformer, and more particularly, to a power transformer capable of preventing local overheating by reducing magnetic flux leaking inside a transformer.

Generally, a power transformer is a device that converts power supplied to a necessary power source and supplies the same.

During the operation of the transformer, a leakage magnetic flux is generated between the windings installed in the center of the transformer.

When the conventional power transformer is operated, a leakage magnetic flux is generated in the winding, and the leakage magnetic flux flows from the end portion of the winding to the iron core, clamp or wrought iron, tank wall, lead wire and the like.

However, there is a problem that the leakage magnetic flux generated in the above-described winding causes heat and loss while directly connecting or passing through the winding, and deteriorates the insulating oil and the insulating material.

Therefore, in order to control the leakage magnetic flux, shielding plates are conventionally provided on the tank wall of the power transformer, but a large effect can not be obtained.

FIG. 1 is a perspective view showing a structure of a conventional power transformer, and FIG. 2 is a front view showing a structure of a conventional power transformer.

1 and 2, a conventional power transformer includes an upper wrought iron 10, a lower wrought iron 20, a plate 30, a winding 50, and an iron core 40.

The upper wrought iron 10 and the lower wrought iron 20 are spaced apart from each other in the vertical direction.

The plate (30) connects both ends of the upper wrought iron (10) and the lower wrought iron (20).

The iron core 40 is disposed at the rear of the upper and lower wrought iron plates 10 and 20 and has a rim 41 formed in a ' And a winding guide part (42).

The winding (50) is formed by being wound by a winding wire set in the winding guide (42).

Here, the upper wrought iron (10) and the lower wrought iron (20) serve to warn the iron core and the winding (50).

The plate (30) serves to support the iron core (40).

The iron core 40 constitutes a magnetic circuit for transforming and the winding 50 serves to flow a current that forms the magnetic characteristics of the transformer itself.

3 is a view showing a path of a leakage magnetic flux in a conventional transformer.

Referring to FIG. 3, it can be seen that in the conventional transformer, leakage flux is generated in the winding, and the path of the leakage magnetic flux extends to the upper and lower wrought iron 20 sides.

In addition, the path of the leakage magnetic flux forms a path extending toward the tank wall side.

Accordingly, there is a problem in that a loss is generated in the structures of the upper and lower wrought iron (10, 20) and the plate (30) due to the leaked magnetic flux generated as described above, and local temperature rise occurs.

In addition, the temperature rise of the transformer due to the above structure causes a rise in the temperature of the insulating oil, and also has a problem of reducing the life of the transformer.

In addition, there is also a problem that the generation of deterioration of the insulator is increased to cause an electrical failure due to a decrease in the characteristics of the insulator.

A prior art related to the present invention is Korean Patent Laid-Open Publication No. 10-2004-0016555.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a transformer for electric power which can induce a path of a leakage magnetic flux generated in a winding of a transformer so as to flow through an iron core and prevent loss and local deterioration of a structure along the flow to the wrought iron and the tank .

In a preferred aspect, the present invention provides a power transformer.

The power transformer includes an iron core portion having a winding support portion formed at a center thereof; A winding portion provided on the winding supporting portion; A support portion disposed along the rim of the iron core portion and supporting the iron core portion; And a flux path guide portion installed in the support portion and guiding a leakage magnetic flux path generated from the winding portion toward the iron core portion.

It is preferable that the support portion includes a wrought iron member for supporting the upper and lower ends of the iron core portion and a plate for connecting both ends of the wrought iron member and supporting both ends of the iron core portion.

The flux path guide portion is preferably provided on the wrought iron member.

It is preferable that the wrought iron member is provided with an installation groove along the longitudinal direction of the wrought iron member.

Preferably, the continuous path guide portion is installed in the installation groove.

Preferably, the magnetic flux path guide portion includes an induction member that is installed in the installation groove and is bent so that the installation groove is covered from the winding portion.

It is preferable that the installation grooves are formed in a plurality of intervals along the longitudinal direction of the wrought iron member, and the guide member is installed in a plurality of the installation grooves formed in a plurality of the installation grooves.

It is preferable that the guide member includes the first guide member and a second guide member bent from the first guide member.

Wherein the first induction member is disposed on an outer surface of the wrought iron member so as to follow the same direction as the winding portion and the second induction member is disposed on an inner surface of the wrought iron member so as to face both end faces of the winding portion .

It is preferable that a curved portion is formed between the first guide member and the second guide member.

The upper end of the second guide member may be formed with an inclined surface that is inclined gradually toward the winding portion.

INDUSTRIAL APPLICABILITY The present invention has an effect of inducing a path of a leakage magnetic flux generated in a winding of a transformer to flow through an iron core, thereby preventing loss and local deterioration of the structure along the flow to the wrought iron and the tank.

Further, the present invention has the effect of maintaining the insulation distance between the pair of disconnecting members for supporting the upper and lower ends of the winding section and the winding section.

In addition, the present invention has an effect of facilitating the path of the leakage magnetic flux to the winding section more easily by forming an inclined surface that is gradually inclined toward the winding section at the upper end of the second induction member formed in each of the washer members .

Further, according to the present invention, a plurality of guide members are formed, installation grooves are formed in the respective wrought iron members, and the guide member is inserted into each of the installation grooves to improve the stiffness in supporting the winding portion And also has an effect of distributing the supporting force evenly and stably supporting the winding portion.

Further, by providing a plurality of guide members of the present invention in a plurality of installation grooves formed in the wrought iron member, it is possible to secure an insulation distance.

1 is a perspective view showing a structure of a conventional power transformer.
2 is a front view showing a structure of a conventional power transformer.
3 is a view showing a path of a leakage magnetic flux in a conventional transformer.
4 is a perspective view showing a state where the power transformer of the present invention is mounted on a tank portion.
5 is a front view showing the power transformer of the present invention.
6 is a perspective view showing the power transformer of the present invention.
FIG. 7 is a perspective view showing a coupling state of a magnetic path guide portion and a wrought iron member according to the present invention. FIG.
8A and 8B are views showing a leakage magnetic flux path according to the present invention.
FIG. 9 is a perspective view showing another example of the magnetic flux path guide portion according to the present invention. FIG.
10 is a perspective view showing still another example of the magnetic flux path guide portion according to the present invention.
11 is a cross-sectional view showing another example of the magnetic flux pathway induction portion according to the present invention.

Hereinafter, a power transformer of the present invention will be described with reference to the accompanying drawings.

FIG. 4 is a perspective view showing a state where the power transformer of the present invention is mounted on a tank portion, FIG. 5 is a front view showing the power transformer of the present invention, and FIG. 6 is a perspective view showing the power transformer of the present invention.

4 to 6, the power transformer of the present invention mainly includes a tank 100, an iron core 200, a winding 300, a support 400, a magnetic flux path guide 500, .

The iron core 200 includes a rectangular rim 210 and a winding support 220 formed along the vertical direction at the center of the rim 210.

The rim 210 is formed in a rectangular frame shape.

The iron core 200 constitutes a magnetic circuit for achieving transforming pressure.

The winding unit 300 is installed in the winding support unit 220.

Further, the supporting part 400 according to the present invention supports the iron core part 200 and the winding part 300.

The supporting part 400 includes a wrought iron member 410 and a plate 420.

The wrought iron member 410 is composed of an upper wrought iron member 411 and a lower wrought iron member 412.

The upper wrought iron member 411 supports the upper end of the iron core unit 200 and the lower wrought iron member 412 supports the lower end of the iron core unit 200.

The plates 420 are configured as a pair.

Each of the pair of plates 420 is configured to be connected to both ends of the upper wrought iron member 411 and both ends of the lower wiper member 412.

The pair of plates 420 supports the iron core unit 200 and the winding unit 300.

Here, the upper and lower wrought iron members 411 may have the same shape.

Therefore, in the following description, the lower wrought iron member 412 will be described as a representative example, and the component name will be described as the wrought iron member 410. [

The magnetic flux path guide portion 500 according to the present invention is installed in the wrought iron member 410 described above.

The wrought iron member 410 has mounting grooves 430 formed therein.

The installation grooves 430 are formed at intervals along the longitudinal direction of the wrought iron member.

FIG. 7 is a perspective view showing a coupling state of a magnetic path guide portion and a wrought iron member according to the present invention. FIG.

Referring to FIG. 7, the magnetic flux path guide part 500 according to the present invention includes a plurality of guide members 510.

The plurality of guide members 510 may be formed of a silicon steel plate.

The plurality of guide members 510 are formed to be bent.

Preferably, the plurality of guide members 510 '

'Shape.

That is, each of the plurality of guide members 510 includes a first guide member 511 and a second guide member 512.

As described above, the first guide member 511 and the second guide member 512 '

'Shape.

Each of the induction members 510 configured as described above is installed in each of the installation grooves 430.

Each of the installation recesses 430 may be formed in the same shape as that of the guide member 510.

The mounting groove 430 may include a first mounting groove 431 in which the first guiding member 511 is inserted and a second mounting groove 432 in which the second guiding member 512 is inserted .

The first installation groove 431 is formed on the outer surface of the wrought iron member 410.

The second installation groove 432 is formed on the upper surface of the wrought iron member 410.

Here, in the case of the upper wrought iron member 411, the second installation groove 432 may be formed on the lower surface of the upper wrought iron member 411.

Accordingly, the first and second mounting grooves 431 and 432 are also formed in a shape corresponding to the shape of the guide member 510 described above.

In particular, in the guide members 510 according to the present invention, the second guide members 512 form substantially the same plane as the upper surface of the second installation groove 432.

In addition, reinforcing members 440 are further formed on the wrought iron member 410 according to the present invention.

The reinforcing members 440 are formed to protrude forward of the wrought iron member 410 between the mounting grooves 430.

The induction members 510 in the present invention are disposed in a single piece between each of the reinforcing members 440.

In addition, the guide member 510 disposed at the center of the wrought iron member 410 may be wider than the guide member 510 installed at a position spaced apart from the central portion of the guide member 510 .

The guide members 510 according to the present invention are preferably arranged to fit into the installation groove 430 formed in the wrought iron member 410, May be installed to be fixed to the upper end of the second installation groove 432 through another fixture.

With reference to the above configuration, in the present invention, by inserting the shunt induction members between the reinforcing members, the induction members can be inserted while maintaining the insulation distance between the winding unit and the wrought iron members.

Therefore, the induction members can be inserted and inserted without increasing the height of the transformer.

Further, in the present invention, the upper surface of the second induction member in each of the induction members is cut so as to have the same height as the upper surface of the wrought iron member to form the installation groove, It is possible to disperse the force generated in the case of supporting.

Further, in the present invention,

'To form a large number of them, and they can be installed in close proximity to the respective installation grooves, thereby preventing deviation to the outside.

The following describes the magnetic flux path derivation in the transformer having the above configuration.

8A and 8B are views showing a leakage magnetic flux path according to the present invention.

Referring to FIGS. 8A and 8B, a leakage magnetic flux is generated in the winding section 300.

The leakage magnetic flux generated as described above is guided to the upper end side of the first induction member 511 while being incident on the first induction member 511.

At the same time, the leakage flux path (a) incident on the second inductive member 512 can induce a magnetic flux path toward the iron core 200 located behind the wrought iron member 410.

The leakage magnetic flux path a in which the magnetic flux path is guided toward the iron core 200 is indicated by a red curve in FIG. 8B.

Therefore, in the present invention, a path is formed so that the leakage magnetic flux can be guided to the iron core portion, so that the leakage magnetic flux enters into the iron core portion having a relatively low loss so that the leaked magnetic flux generated in the winding portion is absorbed by the tank and the wrought iron member It is possible to effectively prevent the loss and the occurrence of local deterioration due to incidence.

FIG. 9 is a perspective view showing another example of the magnetic flux path guide portion according to the present invention. FIG.

Referring to FIG. 9, the guide members according to the present invention may be installed at intervals in the respective installation grooves with a predetermined number.

That is, in comparison with the above-described example, the present embodiment is characterized in that a plurality of guide members 510 installed in the installation groove 430 are divided.

Therefore, the width of each of the shunt-type induction members 510 'is reduced to one or less, thereby preventing the formation of eddy currents, thereby reducing the temperature.

10 is a perspective view showing still another example of the magnetic flux path induction unit according to the present invention.

Referring to FIG. 10, the guide members 510 according to the present invention are bent, and a curved portion 520 may be formed at the bent corner.

The curved portion 520 may be formed at a connecting portion between the first guide member 511 and the second guide member 512.

The curvature portion 520 is formed so that the magnetic flux path a generated from the winding portion 300 is not concentrated on the edge of the guide member 510 but is dispersed.

In addition, although not shown in the drawing, the thickness of the first inducing member in each of the guide members may be formed so as to gradually become thicker along the lower end from the upper end.

That is, depending on the shape of the thickness, an upward inclined guide surface may be formed on the first guide member.

Therefore, when the magnetic flux path is formed along the first induction member, it can be prevented that the magnetic flux is guided upward along the induction slope and flows into the bottom surface of the structure such as a tank.

11 is a cross-sectional view showing another example of the magnetic flux pathway induction portion according to the present invention.

Referring to FIG. 11, an inclined surface 530 is formed on one surface of the second guide member 512 of each of the guide members 510 according to the present invention.

Preferably, the inclined surface 530 is formed at the upper end of the second guide member 512.

It is preferable that an inclined surface is formed so that the thickness of the second induction member 512 gradually decreases toward the winding part 300.

The inclined surface 530 may form a straight line or may be formed as a convex curved surface.

Is guided to the upper end side of the first induction member 511 while being incident on the first induction member 511 according to its structure.

At the same time, the leakage flux incident on the second guiding member 512 can be guided by the inclined surface 530 toward the iron core 200 positioned behind the wrought iron member 410.

That is, the leakage magnetic flux may be guided to the iron core 200 by the inclined plane 530, and the probability that the leakage flux is guided to the outside of the iron core 200 may be lowered.

Although not shown in the drawing, the overall inclined surface formed on the guide members may be formed to have a concave slope along the center from the outside of both ends, with the center of the wrought iron member as the center.

According to the structure and operation as described above, the embodiment of the present invention induces the path of the leakage magnetic flux generated in the winding of the transformer to flow through the iron core, thereby preventing loss and local deterioration of the structure along the flow to the wrought iron and the tank side can do.

As described above, the power transformer according to the present invention has been described in detail. However, it is apparent that various modifications are possible within the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

It is to be understood that the foregoing embodiments are illustrative and not restrictive in all respects and that the scope of the present invention is indicated by the appended claims rather than the foregoing description, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

100: tank portion
200: iron core part
300:
400: Support
410:
420: plate
430: Installation home
431: First installation home
432: Second installation home
500: flux path guide section
510: guide member

Claims (9)

An iron core portion having at least one winding support portion formed therein;
A winding part installed in the winding supporting part;
A support portion disposed along the rim of the iron core portion and supporting the iron core portion; And
And a flux path guide part installed on the support part and guiding a leakage magnetic flux path generated from the winding part to the iron core part side.
The method according to claim 1,
The support portion
An upper wrought iron member for supporting an upper end portion of the iron core portion, a lower wrought iron member for supporting a lower end portion of the iron core portion,
And a plate for supporting both ends of the upper and lower wrought-iron members.

[3] The apparatus of claim 2,
Wherein the wrought iron member is installed on the wrought iron member.
3. The method of claim 2,
In the wrought iron member,
The installation groove is formed,
Wherein the sustain path inducing unit comprises:
And the power transformer is installed in the installation groove.
5. The method of claim 4,
The magnetic flux path induction unit includes:
Wherein the guide member is formed by bending.
6. The method of claim 5,
The installation groove is formed in a plurality of spaced apart intervals along the longitudinal direction of the wrought iron member,
Wherein the guide member is installed in a plurality of installation grooves formed in a plurality of the guide grooves.
6. The method of claim 5,
Wherein the guide member comprises:
The first guide member, and the second guide member,
Wherein the first induction member is disposed on an outer surface of the wrought iron member so as to follow the same direction as the winding portion,
And the second induction member is disposed on an inner surface of the wrought iron member so as to face both end faces of the winding portion.
8. The method of claim 7,
And a curved portion is formed between the first guide member and the second guide member.
8. The method of claim 7,
And an upper end of the second guide member,
Wherein a slope is formed in which the thickness of the second induction member gradually decreases toward the winding portion.

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