KR101997981B1 - Transformer type tie-plate for reduced stray loss, and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a transformer tie plate for reducing stray loss generated in a tie plate by a leakage magnetic flux in a transformer in which a coil is wound on an iron core to reduce harmonics and unbalance generated in a power distribution system. And a manufacturing method thereof.
A transformer tie plate according to an embodiment of the present invention includes an upper frame positioned at an upper portion of an iron core and fixing an upper portion of the iron core; A lower frame positioned below the iron core for fixing a lower portion of the iron core; And a vertical support vertically connecting the upper frame and the lower frame through a first support, a second support and a third support corresponding to the first leg, the second leg and the third leg, 2 support and the third support are formed with a central protrusion at the center to reduce stray loss by suppressing the leakage flux generated in the primary and secondary coils, .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer tie plate and a manufacturing method thereof,

The present invention relates to a transformer tie plate and a method of manufacturing the same. More particularly, the present invention relates to a transformer tie plate and a method for manufacturing the transformer tie plate, and more particularly to a transformer tie plate The present invention relates to a transformer tie plate for reducing stray loss in a transformer, and a manufacturing method thereof.

In general, the structure of a transformer commonly includes a winding and an iron core in order to perform a function of a transformer, and includes a high-voltage bushing as a connection terminal for applying high-voltage power supplied from the outside by a winding, Pressure bushing. Accordingly, the transformer transforms the high-voltage power drawn through the high-pressure bushing into low-voltage power, and supplies the power to the receptacle or distribution line through the low-pressure bushing.

Between the low-pressure bushings, the ferromagnetic body is the medium, which becomes the passage of the eddy-current flux, which causes stray loss of the transformer load loss. This load loss is caused by the leakage magnetic flux outside the windings being linked with the structure of the transformer, and the larger the current transformer is, the more seriously it increases.

The stray load hand represents the loss due to the surrounding structures of the transformer, not the iron core and windings. Since the steel structure is intended to support the iron core or to protect the transformer itself, the loss analysis of the material change is more important than the shape change of the structure. Therefore, the loss reduction effect is not easy.

The transformer's tie-plate connects and supports the windings, iron cores and bus bars at the top and bottom. Transformers are mainly caused by stray load hand in tie plate, secondary common bus bar, and frame.

Since the position of the tie plate is closer to the winding than the other steel structures, the leakage flux is incident on the tie plate at a high density. If the material or shape of the tie plate is incorrectly selected, it may cause a local temperature rise of the transformer, and the insulation around the hot spot may deteriorate. It is known that the lifetime reduction of the transformer due to such local temperature increase is reduced by half in each case when the temperature rises by approximately 10 ° C.

Therefore, in designing the transformer, space is allocated for the heat dissipation design near the tie plate in order to prevent fatal deterioration affecting the life of the transformer, which is an obstacle to miniaturization of the transformer.

Korean Published Patent Application No. 10-2012-0072443 (Published on July 04, 2012)

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and an object of the present invention is to provide a transformer in which a coil is wound around an iron core to reduce harmonics and unbalance generated in a power distribution system. thereby reducing the stray loss of the transformer, and a method of manufacturing the transformer tie plate.

According to an aspect of the present invention, there is provided a transformer tie plate including a transformer in which a primary coil and a secondary coil are wound around a first leg, a second leg, and a third leg of an iron core, A transformer tie plate for supporting the weight of the secondary coil and the iron core and supporting the iron core by being positioned on the front and rear surfaces of the iron core, the transformer tie plate comprising: an upper frame positioned above the iron core and fixing the upper portion of the iron core; A lower frame positioned below the iron core and fixing the lower portion of the iron core; And a vertical support vertically connecting the upper frame and the lower frame through the first support, the second support, and the third support corresponding to the first leg, the second leg, and the third leg, The support and the third support are each formed with a central protrusion at the central portion to reduce stray loss by suppressing the leakage magnetic flux generated in the primary coil and the secondary coil, Can,

When the central protrusion is formed at the central portion of each of the first, second, and third supports, an upper protrusion is formed at a portion coupled to the upper frame, and a lower protrusion And an inclined surface may be formed on the central protrusion, the upper protrusion, and the lower protrusion, respectively.

In addition, in the case where the first support, the second support, and the third support have a shape in which the upper side and the lower side are shaded, the inclined surface may be formed in each of the shaded portions.

Also, the first support, the second support, and the third support may be coupled through a weld or bolt connection when coupled to the upper frame and the lower frame.

A first outer support is coupled to and supported on an outer side of an upper protrusion of the first support, a second outer support is coupled and supported on an outer side of an upper protrusion of the third support, A third outer support is coupled and supported, and a fourth outer support is coupled to the outer side of the lower protrusion of the third support.

A first upper support is positioned between the first support and the second support and the first upper support supports the upper protrusion of the first support and the upper protrusion of the second support to support the first support, 1, a first lower support is positioned between the first support and the second support, and the first lower support supports the lower protrusion of the first support and the lower protrusion of the second support to support the second support, A second upper support is positioned between the third support and an upper protrusion of the second support and an upper protrusion of the third support are coupled to each other and the second support is supported between the second support and the third support, The second lower support is located on the lower side of the second support and the lower protrusion of the third support And can be supported by engaging the lower projection.

Further, the first winding, the second winding, and the third winding of the primary coil are wound in the same direction in the first leg, the second leg, and the third leg to reduce harmonics and unbalance of voltage and current generated in the power distribution system The first winding, the second winding, and the third winding of the secondary coil may be wound in a staggered manner in the first leg, the second leg, and the third leg.

In addition, the first leg is wound with the first winding, the second winding, and the first winding sequentially stacked, and the first winding, the second winding, the first winding, the second winding, and the first winding are sequentially overlapped, The third winding, the second winding, the third winding, and the second winding are sequentially overlapped and wound on the second leg, and the second winding, the third winding, and the second winding are sequentially superimposed and wound, The third winding, the third winding, the first winding, and the third winding are successively superimposed and wound on the third leg, and the third winding, the first winding, and the third winding are sequentially superimposed and wound. .

The first winding is wound in the order of the first leg, the third leg and the first leg, and wound in the order of the first leg, the third leg, the first leg, the third leg and the first leg, The winding is wound in the order of the second leg, the first leg, and the second leg in the order of the second leg, the first leg, the second leg, the first leg and the second leg, The second leg, and the third leg in this order, and the third leg, the second leg, the third leg, the second leg, and the third leg in this order.

According to another aspect of the present invention, there is provided a method of manufacturing a transformer tie plate, the transformer including a first coil, a second coil, and a third coil wound around the first coil, (A) an upper frame is positioned on an upper portion of an iron core, and an upper portion of the iron core is disposed on an upper frame ; (b) placing a lower frame at a lower portion of the iron core and a lower portion of the iron core at a lower frame; (c) In a vertical support for coupling the upper frame and the lower frame, a central protrusion is formed at the center portion to suppress leakage flux generated in the primary coil and the secondary coil to reduce stray loss Forming a first support, a second support, and a third support so that the upper and lower sides have a concave shape; And (d) positioning the first support, the second support, and the third support to correspond to the first and second legs and the third leg, respectively, and coupling the upper and lower frames respectively.

In addition, in the step (c), when the center protrusion is formed at the central portion of each of the first support, the second support, and the third support, an upper protrusion is formed at a portion coupled with the upper frame, And a slant surface may be formed on the central protrusion, the upper protrusion, and the lower protrusion, respectively.

In addition, in the step (c), when the first support, the second support, and the third support have a top and bottom sloped shape, sloped surfaces may be formed at each of the sloped portions.

Further, in the step (d), the first support, the second support, and the third support may be coupled through a weld or bolt connection when they are coupled to the upper frame and the lower frame.

In addition, in the step (c), when the center protrusion is formed at the center portion of each of the first support, the second support, and the third support, an upper protrusion is formed at a portion coupled with the upper frame, A lower protrusion may be formed at a portion coupled with the frame, and the central protrusion, the upper protrusion, and the lower protrusion may be formed with inclined surfaces, respectively.

In addition, in the step (c), when the first support, the second support, and the third support have a top and a bottom, respectively, the inclined surfaces may be formed in the concave portions.

In addition, in the step (c), a first outer support is coupled and supported on an outer side of an upper protrusion of the first support, a second outer support is coupled and supported on an outer side of an upper protrusion of the third support, The third outer support is coupled to the outer side of the lower protrusion of the support and the fourth outer support is coupled to the outer side of the lower protrusion of the third support.

Further, in the step (c), a first upper support is positioned between the first support and the second support and the first upper support is supported by the upper protrusion of the first support and the upper protrusion of the second support, And a first lower support is positioned between the first support and the second support and the first lower support supports the lower protrusion of the first support and the lower protrusion of the second support, , A second upper support is positioned between the second support and the third support and the upper support supports the upper protrusion of the second support and the upper protrusion of the third support, The second lower support is positioned between the support and the third support to the lower side and the second lower support is supported by the lower protrusion of the second support It may be supported by coupling the lower projecting portion of the third support group.

In addition, in the step (d), the first support, the second support, and the third support are coupled through the first and second engagement grooves formed in the upper frame, respectively, The second engaging groove and the third engaging groove are respectively inserted into the engaging plates to receive the support of the upper frame and the engaging plates may be provided with a plurality of recesses for increasing engagement.

In addition, the width d of the welded portions welded to the first support, the second support, and the third support can be equal to or smaller than the thickness t of each of the engagement plates.

In the step (d), the first winding, the second winding and the third winding of the primary coil are wound in the same direction in the first leg, the second leg, and the third leg, and the voltage and current The first winding, the second winding, and the third winding of the secondary coil may be wound in a staggered manner in the first leg, the second leg, and the third leg to reduce the harmonics and unbalance of the secondary coil.

In the step (d), the first winding, the second winding, and the first winding are sequentially wound and superposed on the first leg, and the first winding, the second winding, the first winding, The first winding, the second winding, the third winding, the second winding, the second winding, the second winding, the second winding, the second winding, the third winding, the second winding, The third winding, the first winding, and the third winding are successively superimposed and wound on the third leg, wherein the third winding, the first winding, the third winding, the first winding, the third winding, Can be sequentially wound and superimposed.

In the step (d), the first winding is wound in the order of the first leg, the third leg and the first leg, and the first leg, the third leg, the first leg, the third leg, And the second winding is wound in the order of the second leg, the first leg and the second leg, and wound in the order of the second leg, the first leg, the second leg, the first leg and the second leg, The third winding is wound in the order of the third leg, the second leg, and the third leg, and wound in the order of the third leg, the second leg, the third leg, the second leg, and the third leg.

According to the present invention, the stray loss due to the leakage magnetic flux generated in the transformer in which the coil is wound on the iron core can be reduced by deforming the shape of the tie plate.

In addition, although the magnitude of the magnetic flux is the same on each leg by the transformer, the effect of reducing the harmonic and unbalanced component currents as the magnetic fluxes cancel each other due to the phases of the divided currents generated in the load being opposite to each other have.

In addition, the stray loss can be reduced by suppressing the leakage magnetic flux generated in the coil through the structure that supports the winding state of the coil through the tie plate of the transformer so as not to be deformed.

In addition, the hot spot temperature of the portion where the tie plate of the transformer and the frame are coupled can be reduced by about 6 ° C.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the overall configuration of a transformer tie plate according to an embodiment of the present invention; Fig.
2A and 2B are views showing an example of forming a transformer tie plate according to an embodiment of the present invention.
3 is a view illustrating an example of a structure in which a first support, a second support, and a third support of a tie plate according to an exemplary embodiment of the present invention are welded to an upper frame and a lower frame.
4 is a conceptual diagram of a hybrid transformer to which a tie plate according to an embodiment of the present invention is applied.
5 is a partial winding diagram of a hybrid transformer to which a tie plate according to an embodiment of the present invention is applied.
6 is a flowchart illustrating a method of manufacturing a transformer tie plate according to an embodiment of the present invention.
7A and 7B are graphs showing stray load losses of respective portions of a transformer tie plate according to an embodiment of the present invention.
8A and 8B are diagrams illustrating an example of comparison of stray load loss according to the result of applying the transformer tie plate according to the embodiment of the present invention to each hybrid transformer.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between . Also, when an element is referred to as "comprising ", it means that it can include other elements as well, without departing from the other elements unless specifically stated otherwise.

If any part is referred to as being "on" another part, it may be directly on the other part or may be accompanied by another part therebetween. In contrast, when a section is referred to as being "directly above" another section, no other section is involved.

The terms first, second and third, etc. are used to describe various portions, components, regions, layers and / or sections, but are not limited thereto. These terms are only used to distinguish any moiety, element, region, layer or section from another moiety, moiety, region, layer or section. Thus, a first portion, component, region, layer or section described below may be referred to as a second portion, component, region, layer or section without departing from the scope of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms as used herein include plural forms as long as the phrases do not expressly express the opposite meaning thereto. Means that a particular feature, region, integer, step, operation, element and / or component is specified and that the presence or absence of other features, regions, integers, steps, operations, elements, and / It does not exclude addition.

Terms indicating relative space such as "below "," above ", and the like may be used to more easily describe the relationship to other portions of a portion shown in the figures. These terms are intended to include other meanings or acts of the apparatus in use, as well as intended meanings in the drawings. For example, when inverting a device in the figures, certain parts that are described as being "below" other parts are described as being "above " other parts. Thus, an exemplary term "below" includes both up and down directions. The device can be rotated by 90 degrees or rotated at different angles, and terms indicating relative space are interpreted accordingly.

Unless otherwise defined, all terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Commonly used predefined terms are further interpreted as having a meaning consistent with the relevant technical literature and the present disclosure, and are not to be construed as ideal or very formal meanings unless defined otherwise.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the overall configuration of a transformer tie plate according to an embodiment of the present invention; Fig.

Referring to FIG. 1, a transformer tie plate 100 according to an embodiment of the present invention includes a first leg 142, a second leg 144, and a third leg 146, An upper frame 120 for fixing the upper portion of the iron core; A lower frame 130 positioned below the iron core 140 to fix the lower portion of the iron core; And a first support 152 corresponding to the first leg 142 and the second leg 144 and a third leg 146, a second support 154 and a third support 156, And a vertical support 150 connecting the lower frame 310 vertically.

The first support 152, the second support 154 and the third support 156 are disposed at the center of the first and second coils so as to reduce leakage flux generated in the primary and secondary coils, A central protruding portion may be formed at the portion, and the upper and lower sides may have a sharped shape.

In the embodiment of the present invention, the transformer tie plate 100 is applied to a hybrid transformer as an example. However, the present invention is not limited thereto and can be applied to a general transformer as well.

The hybrid transformer is wound on the first leg 142 and the second leg 144 and the third leg 146 of the iron core 140 in such a manner that the primary coil is wound in the same direction and the secondary coil is wound in a zigzag shape, The transformer tie plate 100 for the hybrid transformer of the structure supports the weight of the primary coil, the secondary coil, and the iron core, and is positioned on the front and rear surfaces of the iron core 140 to support the iron core.

2A and 2B are views showing an example of forming a transformer tie plate according to an embodiment of the present invention.

2A and 2B, the transformer tie plate 100 includes a first support 152, a second support 154, and a third support 156, And the protrusions 152-2, 154-2, and 156-2 are formed.

At this time, the transformer tie plate 100 has central protrusions 152-2, 154-2, and 156-2 at its center, and upper protrusions 152-4 And lower protrusions 152-6, 154-6, and 156-6 may be formed on a lower portion coupled to the lower frame 130. In addition,

That is, the transformer tie plate 100 has the upper projections 152-4, 154-4, and 156-4 formed on the upper portion coupled with the upper frame 120, The lower protrusions 152-6, 154-6, and 156-6 may be formed.

The center projections 152-2, 154-2, 156-2 and the upper projections 152-4, 154-4, 156-4 have an oblique shape and the central projections 152-2, 154- 2 and 156-2 and the lower protrusions 152-6, 154-6 and 156-6, the inclined surfaces may be formed in the cut-in portions.

That is, in the transformer tie plate 100, the first support 152, the second support 154, and the third support 156 have the same shape, and each of the supports has a shape .

The transformer tie plate 100 has a first outer support 150-1 and a second outer supporter 150-2 on the front side LV-Side for supporting the iron core 140 from the front side of the iron core 140, The third outer support 150-3, and the fourth outer support 150-4 are coupled and supported.

That is, the first outer support 150-1 is coupled and supported on the outer side of the upper projection 152-4 of the first support 152, and on the outer side of the upper projection 156-4 of the third support 156 And a second outside support 150-2 is coupled and supported. A third outer support 150-3 is coupled and supported on the outer side of the lower protrusion 152-6 of the first support 152 and a fourth outer support 150-3 is provided on the outer side of the lower protrusion 156-6 of the third support 156, And an outer support 150-4 is coupled and supported.

A first upper support 158-1 is positioned on the upper side between the first support 152 and the second support 154 and a first upper support 158-1 is located on the upper side of the first support 152, And the upper protrusion 154-4 of the second support base 154 are coupled and supported.

The second upper support 158-2 is positioned on the upper side between the second support 154 and the third support 156 and the second upper support 158-2 is positioned on the upper side of the second support 154, (154-4) and the upper projection (156-4) of the third support base (156).

The first lower support rod 158-3 is positioned between the first support rod 152 and the second support rod 154 to the lower side and the first lower support rod 158-3 is positioned between the first support rod 152 and the second support rod 154, (152-6) and the lower protruding portion (154-6) of the second support base (154).

The second lower support 158-4 is positioned between the second support 154 and the third support 156 at the lower side and the second lower support 158-4 is positioned at the lower side of the second support 154, And the lower protrusion 156-6 of the third support base 156 are combined and supported.

The transformer tie plate 100 has a first outer support 150-1 and a second outer supporter 150-2 on the rear side HV-Side supporting the iron core 140 from the rear side of the iron core 140, ), The third outside support 150-3 and the fourth outside support 150-4 are absent. That is, the first support 152, the second support 154, and the third support 156 are connected to the first upper support 158-1 and the second upper support 158- 2, and is coupled and supported to the lower side via a first lower support rod 158-3 and a second lower support rod 158-4.

3 is a view illustrating an example in which the first to third support rods of the transformer tie plate according to the embodiment of the present invention are welded to the upper frame and the lower frame.

3, the first support 152, the second support 154 and the third support 156 in the transformer tie plate 100 are coupled to the upper frame 120 and the lower frame 130, When they are welded together. Of course, the present invention is not limited to this, but can be combined with a bolt fastening method.

3, when the first support 152, the second support 154 and the third support 156 are welded to the upper frame 120 and the lower frame 130, respectively, The upper frame 120 includes a first coupling groove 202 and a second coupling groove 204 for coupling the first support 152, the second support 154 and the third support 156, Grooves 206 may be formed.

The upper frame 120 has hooks 502 and 504 which are inserted into the first coupling groove 202 and the second coupling groove 204 and the third coupling groove 206 and are supported by the upper frame 120, , And 506, respectively.

A plurality of recessed portions 512, 514, and 516 may be formed on the respective latching plates 502, 504, and 506 to increase the engagement.

3, the width d of the welded portion of each of the engaging plates 502, 504, 506 to be welded to the first support 152, second support 154 and third support 156, respectively, 502, 504, and 506, respectively.

FIG. 4 is a conceptual view of a hybrid transformer to which a transformer tie plate according to an embodiment of the present invention is applied, and FIG. 5 is a partial winding diagram of a hybrid transformer to which a transformer tie plate according to an embodiment of the present invention is applied.

4 and 5, a hybrid transformer to which the tie plate according to the present invention is applied includes a first transformer 40 for the iron core 40 having the first leg 42, the second leg 44 and the third leg 46 formed therein The first winding 12, the second winding 14 and the third winding 16 of the primary coil 10 are connected to the first leg 42, the second leg 44 and the third leg 46 And can be wound in the same direction.

The hybrid transformer to which the tie plate according to the present invention is applied has a first winding 22 and a second winding 24 of the secondary coil 20 for reducing harmonics and unbalance of voltage and current generated in the power distribution system And the third winding 26 may be wound in a zigzag fashion in the first leg 42, the second leg 44, and the third leg 46. [

At this time, the hybrid transformer may be a? -Y transformer. That is, the primary coil 10 of the transformer main body can be connected to the? -Type, and the secondary coil 20 can be connected to the Y-type. However, the form of the transformer main body according to the embodiments of the present invention is not limited thereto, and it is natural that a person skilled in the art can wire the transformer main body by various methods. Hereinafter, for convenience of explanation, a hybrid transformer of the? -Y type will be described in the following description.

The iron core 40 has a first leg 42, a second leg 44 and a third leg 46. The first leg 42, the second leg 44 and the third leg 46 As shown in FIG. The iron core 40 may be a silicon steel plate, or an amorphous metal may be used. Here, the amorphous metal is an amorphous magnetic material obtained by rapidly cooling a molten metal mixed with iron (Fe), boron (B), silicon (Si) and the like. However, it is not limited thereto.

The primary coil 110 can be connected to the? Type. The primary coil 10 includes a first winding 12, a second winding 14 and a third winding 16 and includes a first winding 12, a second winding 14 and a third winding 16 May be wound in the same direction on the first leg 42, the second leg 44, and the third leg 46, respectively. At this time, the first winding 12, the second winding 14 and the third winding 16 are wound one or more times on the first leg 42, the second leg 44 and the third leg 46, For example, the turns ratio of the first winding 12, the second winding 14 and the third winding 16 may be 1: 1: 1, but is not limited thereto.

The secondary coil 20 may be wired to the first leg 42, the second leg 44, and the third leg 46 in a Y-shape. The secondary coil 20 includes a first winding 22, a second winding 24 and a third winding 26 and includes a first winding 22, a second winding 24, and a third winding 26 to reduce harmonics and unbalance of voltage and currents occurring in the distribution system. The second leg 44, and the third leg 46 in a zigzag fashion. That is, the first winding 22, the second winding 24 and the third winding 26 of the secondary coil 20 are zigzag-wound and the current flowing in the secondary coil 20 is supplied to the primary coil 10 so that the magnetic flux generated in the iron core 40 is canceled.

That is, the hybrid transformer has a first winding 22, a second winding 24, and a third winding 22 of the secondary coil 20 in the first leg 42, the second leg 44, and the third leg 46, respectively. Two types of windings selected from the group including the windings 26 are alternately wound and two types of windings wound on the first leg 42, the second leg 44 and the third leg 46 are wound And is wound around the iron core 40 in a superimposed manner.

The zigzag winding of the secondary coil 20 means that the first winding 22, the second winding 24 and the third winding 26 constituting the secondary coil 20 are connected to the first winding 22 of the iron core 40 The second leg 44, and the third leg 46. The second leg 44 and the third leg 46 are wound in an intersecting manner to two or more legs selected from the group including the leg 42, the second leg 44, Alternatively, the first winding 22, the second winding 24, and the second winding 22 of the secondary coil 20 are connected to the first leg 42, the second leg 44, and the third leg 46 of the iron core 40, respectively. Means that at least two windings selected from the group including the third winding 26 are wound at the intersection.

4 and 5, in the hybrid transformer to which the tie plate of the present invention is applied, the first winding 22 of the secondary coil 20 is connected to the first leg 42, the third leg 46, The first leg 42, the third leg 46 and the first leg 42 in this order and the second winding 24 is wound in the order of the second leg 44, the first leg 42, The leg 44, the first leg 42 and the second leg 44 in this order. The third winding 26 of the secondary coil 20 also includes a third leg 46, a second leg 44, a third leg 46, a second leg 44 and a third leg 46, In this order. At this time, the first winding 22, the second winding 24 and the third winding 26 of the secondary coil 20 are connected to the neutral line N, respectively.

On the other hand, the first winding 22 of the secondary coil 20 can be wound in opposite directions in the first leg 42 and the third leg 46, and the second winding 24 can be wound in the second leg 44 and the first leg 42 in opposite directions. In addition, the third winding 26 of the secondary coil 20 can be wound in the opposite direction in the third leg 46 and the second leg 44. Then, the magnitudes of the magnetic fluxes on the respective legs 42, 44 and 46 are the same, but the phases of the image minute currents generated in the load are opposite to each other and the magnetic flux is canceled, .

The first winding 22, the second winding 24, and the third winding 46 wound in zigzag form in the first leg 42, the second leg 44, and the third leg 46 in the secondary coil 20 26 may be 1: 1: 1: 1: 1 or 1: 2: 2: 2: 1, respectively. The first leg 42, the third leg 46, the first leg 42, the third leg 46 and the first leg 42 in this order, for example, ) May be 1: 1: 1: 1: 1 or 1: 2: 2: 2: 1. However, the present invention is not limited thereto, and can be wound at various winding ratios within a range that can be implemented by a person skilled in the art.

When the primary coil 10 and the secondary coil 20 are connected to each other in the delta type and the y type, the interference preventing plate 30 is interposed between the primary coil 10 and the secondary coil 20, . When the relatively high voltage is applied to the primary coil 10 than the secondary coil 20, the interference preventing plate 30 is connected to the first load connected to the secondary coil 20 to which the low voltage is applied, 2 Reduces electrical damage to the load. Further, the interference preventing plate 30 prevents harmonic waves generated between the power source and the first load and the second load from flowing.

6 is a flowchart illustrating a method of manufacturing a transformer tie plate according to an embodiment of the present invention.

6, the transformer tie plate 100 according to the embodiment of the present invention includes an upper frame 120 on an upper portion of an iron core 140 and an upper frame 120 on an upper portion of the iron core 140. [ (S610).

At this time, the iron core 140 is provided to be raised in each coil, and the upper and lower portions are connected to each other. As the material of the iron core 140, a directional silicon steel sheet manufactured by a cold rolling method may be used. The iron core 140 may be surrounded by an insulating tape having excellent thermal and mechanical characteristics, and the surface of the iron core 140 may be rust-proofed for protection.

In addition, the upper frame 120 may be installed in the same direction as the lower frame 130 on the upper portion of the coil (not shown). The upper frame 120 may be made of the same material as the lower frame 130. That is, the upper frame 120 may be a rectangular steel. The bed frame 110 is a base structure and is firmly fixed to a ground or the like.

A lower frame 130 is positioned below the iron core 140 and a lower portion of the iron core 140 is fixed to the lower frame 130 in operation S620.

Here, the lower frame 130 is installed in a direction orthogonal to the bed frame 110 at the center of the bed frame 110. The lower frame 130 may be formed to have a length that accommodates all three-phase coils (not shown). The lower frame 130 may be formed as a section shape steel. For example, the lower frame 130 may be formed of a rectangular steel.

Spacers 160 may be interposed between the lower frame 130 and the coil (not shown) and between the upper frame 120 and the coil (not shown). The spacer 160 may be made of wood or the like. The crossbar 125 is mounted on the upper frame 120. The cross bars 125 are installed in a direction perpendicular to the upper frame 120 and in a direction parallel to the bed frame 110. [ The crossbar 125 is coupled to both sides of the upper frame 120 to prevent the upper frame 120 from being opened. The size of the crossbar 125 may be smaller than the size of the bed frame 110. That is, the length of the crossbar 125 is shorter than the length of the bed frame 10, and the width of the crossbar 125 may be narrower than the width of the bed frame 110. The interval between the crossbars 125 may be set to be equal to the interval between the bed frames 110.

The leakage flux generated in the primary coil 10 and the secondary coil 20 is suppressed against the vertical support 150 for coupling the upper frame 120 and the lower frame 130, the center protrusions 152-2, 154-2 and 156-2 are formed at the center so as to reduce the stray loss and the first and second supports 152 and 154 are formed so as to have the upper and lower sides, And a third support 156 are formed (S630).

When the center protrusions 152-2, 154-2, and 156-2 are formed at the center of the first support 152, the second support 154, and the third support 156, The upper protrusions 152-4, 154-4 and 156-4 are formed at a portion coupled with the lower frame 130 and the lower protrusions 152-6, 154-6, 156- 6 and the center projections 152-2, 154-2, 156-2 and the upper projections 152-4, 154-4, 156-4 and the lower projections 152-6, 154-6, 156 -6), respectively.

In addition, when the first support 152, the second support 154, and the third support 156 have a top and bottom sloped shape, sloped surfaces may be formed in the sloped portions, respectively.

The vertical support 150 is formed of a straight steel (I-steel) and is formed to have a length from the upper frame 120 to the lower frame 130. The vertical supports 150 are provided symmetrically on both sides of the iron core 140. The vertical support 150 is coupled to the upper frame 120 to support the iron core 140 and may be made of steel.

The transformer tie plate 100 according to the embodiment of the present invention includes the first and second legs 152 and 154 and the third and fourth legs 156 and 156, And the upper frame 120 and the lower frame 130, respectively (S640).

That is, the first support 152, the second support 154, and the third support 156 engage the respective upper protrusions 152-4, 154-4, and 156-4 with the upper frame 120, Each lower protrusion 152-6, 154-6, 156-6 may be coupled to the lower frame 130 via a weld or bolt connection.

The upper frame 120 includes a first coupling groove 202 and a second coupling groove 204 for coupling the first support 152 with the second support 154 and the third support 156, 3 coupling grooves 206 may be formed.

The upper frame 120 has hooks 502 and 504 which are inserted into the first coupling groove 202 and the second coupling groove 204 and the third coupling groove 206 and are supported by the upper frame 120, , And 506, respectively.

Each of the engaging plates 502, 504 and 506 is provided with a plurality of recessed grooves 512, 514 and 516 for increasing the welded joint and the recessed grooves 512, 514 and 516 are formed with engaging plates 502 and 504 , And 506, respectively. 3, the width d of the welded portion of each of the engaging plates 502, 504, 506 to be welded to the first support 152, second support 154 and third support 156, respectively, 502, 504, and 506, respectively.

3, the width 'D' of the recessed portions 512, 514 and 516 is formed to be wider than twice the width 'd' of the welded portion. Accordingly, the recessed portions 512, 514, and 516 can secure a space required for welding, thereby increasing the welding surface, so that the coupling force between the engagement plates 502, 504, and 506 and the vertical support 150 can be improved.

7A and 7B are graphs showing stray load losses of respective portions of a transformer tie plate according to an embodiment of the present invention.

The transformer tie plate 100 according to the present invention is positioned closer to the coil than the other steel structures, so that the leakage magnetic flux is incident on the transformer tie plate 100 with high density.

If the material or shape of the transformer tie plate 100 is improperly designed, the local temperature rise of the transformer is caused, the insulation around the hot spot deteriorates, and the loss increases. As the capacity of the transformer increases, it is very important to optimize the design of the transformer tie plate 100 to reduce the stray load hand.

The tie plate 100 of the transformer according to the present invention includes a first support 152 and a second support 154 of a vertical support 150 coupled to the upper frame 120 and the lower frame 130, 156 are designed as shown in FIG. 2, the eddy current distribution is minimized and the overall eddy current distribution and the stray load are reduced.

7B, the loss of each part of the transformer tie plate 100 according to the embodiment of the present invention is smaller than that of the transformer tie plate 100 located on the rear side (HV-Side) of the iron core 140 The portion HH_1 corresponding to the upper portion of the third support 156 is 5.965 watts and the portion HH_2 corresponding to the upper portion of the second support 154 is 4.375 watts, 152 (HH_3) of 5.453 watts (W).

In the transformer tie plate 100 on the rear side (HV-side) of the iron core 140, the portion HW_1 corresponding to the first upper support 158-1 is 0.546 watts (W) The portion HW_2 corresponding to the upper support 158-2 is 0.500 watts W, the portion HW_3 corresponding to the first lower support 158-3 is 0.526 watts W, (HW_4) corresponding to the area 158-4 is 0.527 watts (W).

In the transformer tie plate 100 on the front side (LV-Side) of the iron core 140, the portion LH_1 corresponding to the central protrusion 152-2 of the first support base 152 is 4.648 watts (W The portion LH_2 corresponding to the center protruding portion 154-2 of the second support base 154 is 3.088 watts and the portion LH_3 corresponding to the lower portion of the third support base 156 is 4.207 watts (W).

In the transformer tie plate 100 on the front side (LV-Side) of the iron core 140, the portion LW_1 corresponding to the first upper support 158-1 is 1.289 watts (W) The portion LW_2 corresponding to the upper support 158-2 is 1.162 watts and the portion LW_3 corresponding to the first lower support 158-3 is 1.153 watts W, And the portion (LW_4) corresponding to the region 158-4 is 1.238 watts (W).

Therefore, the total loss of the total loss of the transformer tie plate 100 according to the embodiment of the present invention can be calculated to be 34.676 watts (W).

8A and 8B are diagrams illustrating an example of comparison of stray load loss according to the result of applying the transformer tie plate according to the embodiment of the present invention to each hybrid transformer.

That is, a first hybrid transformer DZN0_case1 having a general tie plate, a second hybrid transformer DZN0_case2 having a slot in a tie plate, a hybrid transformer DZN0_case3 using a transformer tie plate according to an embodiment of the present invention, ), Respectively.

Referring to FIGS. 8A and 8B, in the case of core loss, both the first hybrid transformer, the second hybrid transformer, and the third hybrid transformer were found to be equal to 9343 watts (W).

Tie-plate losses also showed that the first hybrid transformer was 103 watts, the second hybrid transformer was 34 watts, and the third hybrid transformer was 23 watts (W) .

Copper losses of copper material are 14,500 watts (W) at 100% load, 3,625 watts (W) at 50% load and 100% load at second hybrid transformer (W) at 50% load, 14,500 watts (W) at 100% load and 3,625 watts (W) at 50% load for the third hybrid transformer .

Also, for the total loss, the first hybrid transformer is 23,946 watts (W) at 100% load, 13,071 watts (W) at 50% load, 23,877 watts (W) The third hybrid transformer has 23,866 watts (W) at 100% load and 12,991 watts (W) at 50% load.

In terms of efficiency, the first hybrid transformer is 99.042% when it is 100% loaded, 99.477% when it is 50% loaded, 99.045% when the second hybrid transformer is 100% loaded, 99.480% when it is 50% Hybrid transformers were 99.045% at 100% load and 99.480% at 50% load.

And for the tie plate loss ratio to total loss, the first hybrid transformer is 43.2% at 100% load, 79.1% at 50% load, 14.5% at 100% load, 26.7% at 50% load, 9.7% at 100% load and 17.8% at 50% load.

8B, the tie-plate losses of the tie plate applied to the high-efficiency transformer DYN11_Case 1 are 53.379 watts, the tie plate loss of the first hybrid transformer DZN0_Case 1 is 103.39 watts, The tie plate loss of the second hybrid transformer (DZN0_Case 2) was 34.676 watts (W) and the tie plate loss of the third hybrid transformer (DZN0_Case 3) was 23.099 watts (W).

That is, it can be seen that the loss of the third hybrid transformer DZN0_Case 3 to which the transformer tie plate 100 according to the embodiment of the present invention is applied is 23.099 W (W).

On the other hand, the temperature distribution in the design of the transformer shows that the temperature is concentrated at the upper part of the transformer, and the temperature rises at the part where the stray load is generated, that is, the part where the eddy current distribution is concentrated.

A concentrated portion of the temperature during the fabrication of the actual transformer may further be generated in a portion where the upper and lower frames 120 and 130 and the vertical support 150 overlap and a portion where the frame and the vertical support 150 are fastened with the bolt and nut.

As a result of examining the eddy current distribution of the model proposed in the present invention together with the model to which the actual slot is applied, it is confirmed that the eddy current distribution of the tie plate according to the present invention is alleviated, and the stray load hand is also reduced.

Also, it was confirmed that the hot spot temperature at the portion where the frame and the tie-plate meet is reduced by about 6 ° C.

As described above, according to the present invention, in order to reduce harmonics and unbalance generated in a power distribution system, a stray loss occurring in a tie plate due to a leakage magnetic flux in a transformer in which a coil is wound on an iron core, And a method for manufacturing the transformer tie plate.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims and their equivalents. Only. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

10: primary coil 12: primary winding
14: 2nd winding 16: 3rd winding
20: secondary coil 22: primary winding
24: 2nd winding 26: 3rd winding
30: interference prevention plate 40: iron core
42: first leg 44: second leg
46: Third leg 100: Transformer tie plate
110: bed frame 120: upper frame
125: Crossbar 130: Lower frame
140: iron core 150: vertical support
150-1: first outer support 150-2: second outer support
150-3: third outer support 150-4: fourth outer support
152: first support base 152-2, 154-2, 156-2:
154: second support base 152-4, 154-4, 156-4: upper protrusion
156: third support rods 152-6, 154-6, 156-6:
158-1: first upper support 158-2: second upper support
158-3: first lower support member 158-4: second lower support member
202, 204, 206: coupling grooves 502, 504, 506:
512, 514, 516:

Claims (15)

A transformer in which a primary coil and a secondary coil are wound around a first leg, a second leg, and a third leg of the iron core, the weight of the primary coil, the secondary coil, and the iron core is supported, A transformer tie plate for supporting the iron core,
An upper frame positioned above the iron core and fixing the upper portion of the iron core;
A lower frame positioned below the iron core and fixing the lower portion of the iron core; And
A vertical support vertically connecting the upper frame and the lower frame through a first support, a second support, and a third support corresponding to the first leg, the second leg, and the third leg;
Lt; / RTI >
The first support, the second support, and the third support are each formed with a central protrusion at a central portion thereof to suppress leakage flux generated in the primary coil and the secondary coil to reduce stray loss. And the upper and lower sides have an oblique shape.
The method according to claim 1,
When the center protrusion is formed at the central portion of each of the first support, the second support, and the third support, an upper protrusion is formed at a portion coupled to the upper frame, A protrusion is formed,
Wherein the central projecting portion, the upper projecting portion and the lower projecting portion are each formed with an inclined surface.
The method according to claim 1,
Wherein when the first support, the second support, and the third support have a top and bottom sloped shape, the sloped portions are each formed with an inclined surface.
The method according to claim 1,
Wherein the first support, the second support, and the third support are coupled through a weld or bolt connection when coupled to the upper frame and the lower frame.
The method of claim 2,
A first outer support is coupled and supported on an outer side of an upper protrusion of the first support, a second outer support is coupled and supported on an outer side of an upper protrusion of the third support, And a fourth outer support is coupled and supported on an outer side of a lower protrusion of the third support,
Transformer tie plate.
The method of claim 2,
A first upper support is positioned between the first support and the second support and the upper support supports the upper protrusion of the first support and the upper protrusion of the second support,
A first lower support is positioned between the first support and the second support and the lower support supports the lower protrusion of the first support and the lower protrusion of the second support,
And a second upper support is positioned between the second support and the third support to support the upper protrusion of the second support and the upper protrusion of the third support,
And a second lower support is positioned between the second support and the third support and the lower support supports the lower protrusion of the second support and the lower protrusion of the third support,
Transformer tie plate.
A transformer in which a primary coil and a secondary coil are wound around a first leg, a second leg, and a third leg of the iron core, the weight of the primary coil, the secondary coil, and the iron core is supported, And supporting the iron core, the method comprising the steps of:
(a) placing the upper frame on the iron core and fixing the upper frame on the iron core;
(b) positioning the lower frame at a lower portion of the iron core and fixing the lower frame to the lower portion of the iron core;
(c) a central support for supporting the upper frame and the lower frame to suppress leakage flux generated in the primary coil and the secondary coil to reduce stray loss, Forming a first support, a second support, and a third support so as to form a protrusion and having a top and a bottom in a shaded shape; And
(d) connecting the first support, the second support, and the third support to the first frame, the second frame, and the third frame, respectively, and connecting the first frame and the third frame to the first frame and the second frame;
Wherein the transformer tie plate is made of a metal.
The method of claim 7,
In the step (c), when the center protrusion is formed at the central portion of each of the first support, the second support, and the third support, an upper protrusion is formed at a portion coupled to the upper frame, And a lower protrusion is formed at a portion where the upper protrusion and the lower protrusion are coupled to each other, and the central protrusion, the upper protrusion, and the lower protrusion are each formed with an inclined surface.
The method of claim 8,
Wherein, in the step (c), the first support, the second support, and the third support are each formed with an inclined surface at the cut-out portion when the upper and lower sides have a shape shaded upward and downward, respectively.
The method of claim 8,
In the step (c), a first outer support is coupled and supported on an outer side of an upper protrusion of the first support, a second outer support is coupled and supported on an outer side of an upper protrusion of the third support, Wherein a third outer support is coupled and supported on an outer side of the lower protrusion and a fourth outer support is coupled and supported on an outer side of the lower protrusion of the third support.
The method of claim 8,
The step (c)
A first upper support is located at an upper side between the first support and the second support, and the first upper support supports an upper protrusion of the first support and an upper protrusion of the second support,
A first lower support is positioned between the first support and the second support and the lower support supports the lower protrusion of the first support and the lower protrusion of the second support,
A second upper support is positioned between the second support and the third support and an upper protrusion of the second support is coupled with an upper protrusion of the third support,
The second lower support is positioned between the second support and the third support and the second lower support is supported by the lower protrusion of the second support and the lower protrusion of the third support,
Method of manufacturing a transformer tie plate.
The method of claim 7,
Wherein the first support, the second support, and the third support in the step (d) are coupled through a weld or bolt connection when the upper support and the lower support are coupled to the upper and lower frames.
The method of claim 7,
Wherein the step (d) comprises winding the first coil, the second coil, and the third coil of the primary coil in the same direction in the first leg, the second leg, and the third leg, Characterized in that a first winding, a second winding and a third winding of the secondary coil are wound in a staggered manner in the first leg, the second leg and the third leg to reduce harmonics and unbalance of voltage and current. Of the transformer tie plate.
The method of claim 7,
In the step (d), the first winding, the second winding, and the first winding are sequentially wound and superposed on the first leg, and the first winding, the second winding, the first winding, Are sequentially wound and superimposed,
The second winding, the third winding, and the second winding are sequentially wound and overlapped on the second leg, and the second winding, the third winding, the second winding, the third winding, and the second winding are sequentially overlapped and wound ,
The third leg is wound with the third winding, the first winding, and the third winding sequentially in a superimposed manner, and the third winding, the first winding, the third winding, the first winding, and the third winding are sequentially overlapped and wound Wherein the tie plate is made of a metal.
15. The method of claim 14,
In the step (d), the first winding is wound in the order of the first leg, the third leg, and the first leg, wherein the first leg, the third leg, the first leg, Legs and the first leg,
Wherein the second winding is wound in order of the second leg, the first leg and the second leg, wherein the second leg, the first leg, the second leg, the first leg and the second leg In turn,
Wherein the third winding is wound in the order of the third leg, the second leg and the third leg, wherein the third leg, the second leg, the third leg, the second leg, In order from the bottom of the transformer.

Images