KR20100029072A - A hybrid transformer for transforming and attenuating harmonics and current unbalance, and power supply system comprising the same - Google Patents

Abstract

PURPOSE: A hybrid transformer with a transformation function and a harmonic and current imbalance improving function and a power supply system including the same are provided to reduce a volume by winding a plurality of coils by overlapping a first leg, a second leg, and a third leg. CONSTITUTION: An iron core includes a first leg(110a), a second leg(110b) and a third leg(110c). A first coil(210), a second coil(220), and a third coil(230) of a secondary coil are wound around the first to third legs in zigzags. The first to third coils of the secondary coil are connected to a neutral line. Two kinds of coils selected from a group including the first to third coils are alternatively wound around the first to third legs.

Description

A hybrid transformer for transforming and attenuating harmonics and current unbalance, and power supply system comprising the same}

The present invention relates to a hybrid transformer having a transformer function and a harmonic and current unbalance improvement function, and a power supply system including the same.

In general, an electric transformer is a device that changes the value of alternating voltage or current by using electromagnetic induction, and is used in series with a transmission and distribution system.

On the other hand, harmonics and unbalanced currents are generated in the power system due to an increase in nonlinear loads due to the development of power semiconductors. These harmonics and unbalanced currents flow into the low-impedance power source, causing various problems such as cable overheating, increased power loss due to saturation of transformer cores, and malfunction of electrical equipment.

In order to reduce the harm caused by harmonics and unbalances, K-factor transformers with expanded transformer capacity are installed, or harmonic reduction devices, ball balance compensators, and reactors to assist transformers are separately installed. However, this solution is very economical and efficient due to problems such as overlapping investment of facilities and increase of investment cost by securing installation space.

Therefore, in order to solve the above problems and to secure the efficiency and economics of the installation, it is required to provide a hybrid transformer including a transformer function and a harmonic and an unbalance improvement function.

Technical challenge

The technical problem of the present invention is to provide a hybrid transformer including a harmonic reduction function and an unbalance cancellation function.

Another technical problem of the present invention is to provide a power supply system including the hybrid transformer.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

Technical solution

In order to achieve the above object, a hybrid transformer according to an aspect of the present invention is a transformer comprising an eleventh coil and a secondary coil, comprising: an iron core having a first leg, a second leg, and a third leg; And a first winding, a second winding, and a third winding of the secondary coil zigzag wound around the first leg, the second leg, and the third leg, wherein the first leg, the second leg, and the third winding are included. Each of the legs is alternately wound with two types of windings selected from the group comprising the first winding, the second winding and the third winding, each of which is wound around each of the first leg, the second leg and the third leg. Kinds of windings are wrapped around the core in winding order.

According to another aspect of the present invention, a hybrid transformer includes: an iron core having a first leg, a second leg, and a third leg, and a first winding wound zigzag on the first leg, the second leg, and the third leg, A second winding and a third winding, wherein each of the first leg, the second leg, and the third leg is wound with a plurality of windings selected from the group including the first winding, the second winding, and the third winding; They are piled up around the iron core in order.

A hybrid transformer according to another aspect of the present invention is a transformer comprising a primary coil and a secondary coil, comprising: an iron core having a first leg, a second leg, and a third leg, the first leg, and the third leg. , A first winding of the secondary coil wound in the order of the first leg, the third leg and the first leg and connected to a neutral wire, the second leg, the first leg, the second leg, and the first leg. A second winding of the secondary coil wound in the order of the legs and the second leg and connected to the neutral wire, and the order of the third leg, the second leg, the third leg, the second leg, and the third leg And a third winding of the secondary coil connected to the neutral wire and wound on the first leg, wherein the first leg, the second winding, the first winding, the second winding, and the first winding are sequentially wound and wound on the first leg. The second leg is followed by a second winding, a third winding, a second winding, a third winding, and a second winding The winding is overlapped and wound, and a third winding, a first winding, a third winding, a first winding, and a third winding are sequentially wound and wound on the third leg.

The power supply system according to the embodiments of the present invention includes a hybrid transformer including a harmonic and an unbalance improvement function as well as a transformer function, thereby eliminating the need for separate equipment for harmonic and unbalance improvement.

In addition, the hybrid transformer according to the embodiments of the present invention is formed with a more efficient structure and method is excellent in harmonic reduction function and unbalance cancellation function. Specifically, the hybrid transformer according to the embodiments of the present invention may remarkably reduce the volume of the external transformer by winding a plurality of windings overlapping the first leg, the second leg, and the third leg. In addition, since the connection method is easy when zigzag connection, time and unit cost in the manufacturing process can be greatly saved, resulting in a large cost reduction effect. In addition, the efficiency of the transformer is increased by efficiently connecting to a small volume. That is, it is possible to provide a hybrid transformer which is formed with a more efficient structure and method, and has a considerably excellent harmonic reduction function and an unbalance canceling function with a transformer function.

Specific details of other embodiments are included in the detailed description and the drawings.

1 is a simplified diagram of a power supply system according to an embodiment of the present invention.

2 is a conceptual diagram of a hybrid transformer according to an embodiment of the present invention.

3 is a partial winding view of a hybrid transformer according to an embodiment of the present invention.

4 is a perspective view of a hybrid transformer according to an embodiment of the present invention.

FIG. 5 is a plan view of the hybrid transformer shown in FIG. 4.

FIG. 6 is a bottom view of the hybrid transformer shown in FIG. 4.

7 is a conceptual diagram of a hybrid transformer according to another embodiment of the present invention.

8 is a perspective view of a hybrid transformer according to another embodiment of the present invention.

9 is a plan view of the hybrid transformer shown in FIG. 8.

FIG. 10 is a bottom view of the hybrid transformer shown in FIG. 8.

<Explanation of code about main part of drawing>

1: power supply system 10, 20: hybrid transformer

110, 112: iron core 120, 122: primary coil

200, 202: secondary coil

Embodiment for Invention

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, “comprises” and / or “comprising” refers to the presence of one or more other components, steps, actions and / or devices. Or does not exclude additions.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a simplified diagram of a power supply system according to an embodiment of the present invention.

Referring to FIG. 1, a power supply system 1 according to an embodiment of the present invention includes a hybrid transformer 10. The hybrid transformer 10 is connected in series to a power supply device (not shown) that outputs three-phase power supplied along a transmission line from a power plant. In addition, the hybrid transformer 10 is electrically connected to a distribution stage 13 for distributing the supplied three-phase power to the first load 11a and the second load 11b, respectively. A detailed configuration of the hybrid transformer 10 will be described later.

On the other hand, the hybrid transformer 10 of the power supply system 1 according to an embodiment of the present invention attenuates harmonics by itself, by the installation of the distribution system or by the first load (11a) and the second load (11b). This offsets the unbalance of the generated voltage (or current). That is, since harmonics are attenuated by the installation of the hybrid transformer 10 and unbalance can be reduced, a separate harmonic reduction device and an unbalance reduction device are not required. Therefore, the power supply system 1 according to the embodiment of the present invention can reduce the investment cost, and can reduce the power loss generated in the distribution system.

Hereinafter, a hybrid transformer according to an embodiment of the present invention will be described in more detail with reference to FIGS. 2 to 6.

2 is a conceptual diagram of a hybrid transformer according to an embodiment of the present invention. 3 is a partial winding view of a hybrid transformer according to an embodiment of the present invention.

First, referring to FIGS. 2 and 3, a hybrid transformer 10 according to an embodiment of the present invention includes an iron core 110, a primary coil 120, and a secondary coil 200.

Here, the hybrid transformer 10 according to an embodiment of the present invention may be a transformer of Δ-Y type. That is, the primary coil 120 of the hybrid transformer 10 may be connected in a Δ type, and the secondary coil 200 may be connected in a Y type. However, the wiring form of the hybrid transformer 10 according to the embodiments of the present invention is not limited thereto, and it is natural that a person having ordinary skill in the art may connect in various ways. However, in the following description, for the convenience of description, a transformer of Δ-Y type will be described as an example.

The iron core 110 includes a first leg 110a, a second leg 110b, and a third leg 110c, and the first leg 110a, the second leg 110b, and the third leg 110c are It may be located side by side as shown in FIG. The iron core 110 may be a silicon steel sheet. Alternatively, 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 of course not limited to this.

The primary coil 120 may be wired in a Δ type. The primary coil 120 includes a first winding 210, a second winding 220, and a third winding 230, and the first winding 210, the second winding 220, and the third winding 230. ) May be wound in the same direction on the first leg 110a, the second leg 110b and the third leg 110c, respectively. In this case, the first winding 210, the second winding 220, and the third winding 230 are wound one or more times on the first leg 110a, the second leg 110b, and the third leg 110c, respectively. For example, the number of turns of the first winding 210, the second winding 220, and the third winding 230 may be 1: 1: 1, but is not limited thereto.

The secondary coil 200 may be connected to the first leg 110a, the second leg 110b and the third leg 110c in a Y-type. The secondary coil 200 includes a first winding 210, a second winding 220 and a third winding 230, the first leg to reduce the harmonics and unbalance of voltage and current generated in the distribution system The first leg 110a, the second leg 110b, and the third leg 110c may be wound in a zigzag form. That is, by winding the first winding 210, the second winding 220 and the third winding 230 of the secondary coil 200 in a zigzag, the current flowing in the secondary coil 200 is the primary coil ( By adjusting the current flowing in the 120, the magnetic flux generated in the iron core 110 is adjusted to flow in a direction for canceling.

The zigzag winding of the secondary coil 200 means that the first winding 210, the second winding 220, and the third winding 230 constituting the secondary coil 200 are the first legs of the iron core 110 ( 110a), the second and second legs 110b and the third leg (110c) means that the winding of two or more legs selected from the group including the intersection. Alternatively, a group including a first winding 210, a second winding 220, and a third winding 230 in each of the first leg 110a, the second leg 110b, and the third leg of the iron core 110. This means that two or more windings selected from are wound alternately.

For example, referring to FIGS. 2 and 3, the hybrid transformer 10 according to the exemplary embodiment of the present invention may include the first winding 210 of the secondary coil 200, the first leg 110a, The third leg 110c, the first leg 110a, the third leg 110c and the first leg 110a are wound in the order, and the second winding 220 is the second leg 110b and the first leg. It winds up in order of 110a, the 2nd leg 110b, the 1st leg 110a, and the 2nd leg 110b. In addition, the third winding 230 of the secondary coil 200 may include a third leg 110c, a second leg 110b, a third leg 110c, a second leg 110b, and a third leg 110c. Wind up in order. In this case, the first winding 210, the second winding 220, and the third winding 230 may be connected to the neutral line N, respectively.

Meanwhile, the first winding 210 of the secondary coil 200 may be wound in opposite directions in the first leg 110a and the third leg 110c, and the second winding 220 may be wound in the second leg ( 110b) and the first leg 110a may be wound in opposite directions to each other. In addition, the third winding 230 may be wound in opposite directions in the third leg 110c and the second leg 110b. Then, the magnetic flux on the legs 110a, 110b, and 110c has the same magnitude, but the phases of the image currents generated by the loads are opposite to each other, so that the magnetic fluxes are canceled. Will decrease.

In the secondary coil 200, the first winding 210, the second winding 220, and the third winding wound around the first leg 110a, the second leg 110b, and the third leg 110c in a zigzag fashion. 230) may be 1: 1: 1: 1: 1 or 1: 2: 2: 2: 1. That is, for example, the first winding 210 wound in the order of the first leg 110a, the third leg 110c, the first leg 110a, the third leg 110c, and the first leg 110a. ) Can be 1: 1: 1: 1: 1 or 1: 2: 2: 2: 1. However, the present invention is not limited thereto, and it is obvious that the present invention may be wound at various turns ratios within a range that can be realized by those skilled in the art.

Meanwhile, when the primary coil 120 and the secondary coil 200 are connected to each other in a Δ type and a Y type, the contact preventing plate 130 is interposed between the primary coil 120 and the secondary coil 200. Can be. The contact preventing plate 130 may have a first load 11a connected to the secondary coil 200 to which a low voltage is applied when a voltage higher than that of the secondary coil 200 is applied to the primary coil 120. And electrical damage to the second load 11b. In addition, the contact preventing plate 130 prevents the inflow of harmonics generated between the power supply, the first load 11a, and the second load 11b.

Hereinafter, the physical structure of the hybrid transformer according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 to 6. 4 is a perspective view of a hybrid transformer according to an embodiment of the present invention. FIG. 5 is a plan view of the hybrid transformer shown in FIG. 4. FIG. 6 is a bottom view of the hybrid transformer shown in FIG. 4.

2 to 6, the hybrid transformer 10 according to the exemplary embodiment of the present invention may include the first winding 210, the second winding 220, and the third winding of the secondary coil 200 as described above. The winding 230 is wound zigzag around the first leg 110a, the second leg 110b and the third leg 110c of the iron core 110. At this time, the first leg 110a, the second leg (110b) and the third leg (110c) each of the two types selected from the group including the first winding, the second winding 220 and the third winding (230) The windings of can be wound alternately. That is, two types of windings wound around each of the first leg 110a, the second leg 110b, and the third leg 110c may be wound around the iron core 110 in the winding order.

Here, overlapping and winding around the iron core 110 is perpendicular to the axis of one of the first leg 110a, the second leg 110b, and the third leg 110c, as shown in FIGS. 4 to 6. It means to be superimposed on the phosphorus plane. That is, in FIG. 2, in order to explain a winding method, the first winding 210 of the secondary coil 200 may be positioned at different positions on the first leg 110a, the second leg 110b, and the third leg 110c. 2, the second winding 220 and the third winding 230 are wound. However, the actual configuration of the hybrid transformer 10 according to an embodiment of the present invention, as shown in Figures 4 to 6, the first winding 210, the second winding 220 of the secondary coil 200 ) And the third winding 230 are wound by being superimposed on the legs 110a, 110b, and 110c in the order in which they are wound.

In this case, each of the first leg 110a, the second leg 110b, and the third leg 110c includes a first winding 210, a second winding 220, and a third winding 230. The two selected windings may be alternately wound, and the winding wound first on each of the first leg 110a, the second leg 110b, and the third leg 110c may be wound in contact with each leg. . In addition, the wound winding may be wound so that a distance from the wound leg 110a, 110b, 110c is increased in the order of winding.

In detail, the first winding 110a, the first winding 210, the second winding 220, the first winding 210, the second winding 220 and the first winding 210 are sequentially overlapped and wound up. do. At this time, the wound windings are wound so as to be insulated from each other. That is, the first winding 210, the second winding 220, the first winding 210, the second winding 220, and the first winding 210 sequentially wound on the first leg 110a may be predetermined. It is formed spaced apart from each other, so as to be insulated from each other. In this case, the first winding 210 of the primary coil 120 may be wound around the outer side of the first winding 210. At this time, the first winding 210 of the primary coil 120 is positioned to be spaced apart from the first winding 210 of the secondary coil 200 located at the outermost. Meanwhile, although FIGS. 4 and 5 illustrate that the first winding 210 of the secondary coil 200 located at the outermost portion of the first leg 110a is connected to the neutral wire N, it is not limited thereto. When the first winding 210 of the secondary coil 200 is connected to the neutral line N, the position of the first winding 210 is not important.

In the second leg 110b, the second winding 220, the third winding 230, the second winding 220, the third winding 230, and the second winding 220 are sequentially stacked and wound up and wound up. Windings are wound to insulate each other. That is, the second winding 220, the third winding 230, the second winding 220, the third winding 230, and the second winding 220 which are sequentially wound on the second leg 110b are predetermined to each other. It is formed spaced apart from each other, so as to be insulated from each other. At this time, the second winding 220 of the primary coil 120 may be wound outside the second winding 220 positioned at the outermost portion. At this time, the second winding 220 of the primary coil 120 is positioned to be spaced apart from the second winding 220 of the secondary coil 200 located at the outermost. 4 and 5 illustrate that the second winding 220 of the secondary coil 200 located at the outermost portion of the second leg 110b is connected to the neutral wire N, but is not limited thereto. When the second winding 220 of the secondary coil 200 is connected to the neutral line N, the position of the second winding 220 is not important.

The third winding 110c, the third winding 230, the first winding 210, the third winding 230, the first winding 210, and the third winding 230 are sequentially stacked and wound up and wound up. Windings are wound to insulate each other. That is, the third winding 230, the first winding 210, the third winding 230, the first winding 210, and the third winding 230 which are sequentially wound on the third leg 110c are predetermined to each other. It is formed spaced apart from each other, so as to be insulated from each other. At this time, the third winding 230 of the primary coil 120 may be wound outside the third winding 230 located at the outermost portion. At this time, the third winding 230 of the primary coil 120 is positioned to be spaced apart from the third winding 230 of the secondary coil 200 located at the outermost. Meanwhile, although FIGS. 4 and 5 illustrate that the third winding 230 of the secondary coil 200 located at the outermost portion of the third leg 110c is connected to the neutral wire N, the present invention is not limited thereto. When the third winding 230 of the difference coil 200 is connected to the neutral line N, the position of the third winding 230 is not important.

On the other hand, the hybrid transformer 10 according to an embodiment of the present invention may be a transformer manufactured by an insulation method selected from the group including dry, mold, inflow and gas, but is not limited thereto. Specifically, a dry transformer is a transformer that is used without immersing in insulating oil, and is a transformer insulated by exposing and cooling the transformer body in the air instead of the insulating oil. Molded transformers are molded by epoxy, a nonflammable material. An inflow transformer is a transformer using insulating oil as an insulating medium. The gas transformer is a transformer using a gas such as SF6 gas as an insulating medium. That is, the hybrid transformer 10 according to the exemplary embodiment of the present invention may adopt any type of insulation method as long as the hybrid transformer 10 may be formed to be insulated and spaced apart in the winding order. Of course, the present invention may include an insulation method other than the above-described method within the scope that can be implemented by those skilled in the art.

On the other hand, the first winding 210 is wound in a zigzag in the order of the first leg (110a), the third leg (110c), the first leg (110a), the third leg (110c) and the first leg (110a). . In this case, in order to implement the hybrid transformer 10 in which windings are overlapped and wound, as shown in FIGS. 4 to 6, the windings insulated and spaced apart from each other are connected to the first connection line 211.

That is, the first winding 210 is wound separately by winding the first leg 110a and the third leg 110c, respectively, and connects the plurality of first windings 210 separated by a plurality of first connection lines 211. The first windings 210 on the first leg 110a and the third leg 110c are connected.

Similarly, the second winding 220 is wound separately on the first leg 110a and the second leg 110b, respectively, and connects a plurality of second windings 220 separated by the second connection line 221 to connect the plurality of windings. The second windings 220 on the first leg 110a and the second leg 110b are connected.

The third winding 230 is wound around the second leg 110b and the third leg 110c, respectively, and connects a plurality of third windings 230 separated by the third connecting line 231 to the second leg. The third windings 230 on the 110b and the third leg 110c are connected.

In FIG. 5, the first connection line 211, the second connection line 221, and the third connection line 231 are expressed in different thicknesses, but are not limited thereto. That is, the first connecting line 211, the second connecting line 221, and the third connecting line 231 may have the same thickness or may be different from each other. Alternatively, the first connection line 211, the second connection line 221, and the third connection line 231 may be formed of the same line as the first winding 210, the second winding 220, and the third winding 230, respectively. It may be.

Referring to FIG. 6, the first winding 210 and the second winding of the primary coil 120 wound around the outermost portions of the first leg 110a, the second leg 110b, and the third leg 110c, respectively. It can be seen that the 220 and the second winding 220 are connected in a Δ form by the connection line 121.

According to the hybrid transformer according to the exemplary embodiment of the present invention, the plurality of windings are wound by overlapping the first leg 110a, the second leg 110b, and the third leg 110c.

In general, in a transformer, when winding a plurality of windings in one leg, each of the plurality of windings is wound in different positions of the legs. Specifically, a plurality of windings are wound side by side in the axial direction of the legs. Specifically, the winding is wound around three legs, for example in the form of the conceptual diagram shown in FIG. 2 or 6. In such a structure, the space and volume required are significantly increased because a distance must be secured between a plurality of windings wound side by side on the legs. In addition, the wiring method is complicated and difficult to manufacture when zigzag wiring interlaced with each other, causing the unit cost increases. On the other hand, as the volume increases and the wiring becomes complicated, the leakage current also increases.

According to the hybrid transformer according to the exemplary embodiment of the present invention, the plurality of windings are wound by overlapping a plane perpendicular to the axial direction of each of the first leg 110a, the second leg 110b, and the third leg 110c. . That is, since a plurality of windings are wound around the axes of the legs 110a, 110b, and 110c, the required lengths of the legs 110a, 110b, and 110c are significantly shortened. Therefore, the volume of the external transformer can be greatly reduced.

In addition, according to the hybrid transformer according to an embodiment of the present invention, the connection method in the zigzag connection is easy. Specifically, referring to FIGS. 4 to 6, the first winding 210 and the second winding 220 wound on the first leg 110a, the second leg 110b, and the third leg 110c are overlapped. And the third winding 230 are connected to the first connection line 211, the second connection line 221, and the third connection line 231, respectively, so that the connection method is considerably simplified. Therefore, time and unit cost in a manufacturing process can be saved significantly, and a cost reduction effect is large.

In addition, according to the hybrid transformer according to an embodiment of the present invention, by efficiently connecting to a small volume, the efficiency of the transformer is increased. In other words, it is possible to provide a hybrid transformer formed with a more efficient structure and method and having excellent transformer performance while having excellent harmonic reduction function and unbalance cancellation function.

Hereinafter, a hybrid transformer according to another embodiment of the present invention will be described with reference to FIGS. 7 to 10. 7 is a conceptual diagram of a hybrid transformer according to another embodiment of the present invention. 8 is a perspective view of a hybrid transformer according to another embodiment of the present invention. 9 is a plan view of the hybrid transformer shown in FIG. 8. FIG. 10 is a bottom view of the hybrid transformer shown in FIG. 8.

7 to 10, in the hybrid transformer according to another embodiment of the present invention, the number of zig-zags of the secondary coil is different from that of the hybrid transformer according to the embodiment of the present invention. In addition, the same content as the hybrid transformer according to an embodiment of the present invention will be omitted below.

The first winding 212 of the secondary coil 202 of the hybrid transformer 20 according to another embodiment of the present invention is the order of the first leg (112a), the third leg (112b) and the first leg (112a). Zigzag connection is made. The second winding 222 of the secondary coil 202 is zigzag connected in the order of the second leg 112b, the first leg 112a and the second leg 112b. The third winding 232 of the secondary coil 202 is zigzag-connected in the order of the third leg 112c, the second leg 112b and the third leg 112c. At this time, the windings sequentially wound on each of the legs (112a, 112b, 112c) are overlapped and wound, but is wound and wound with each other is the same as the hybrid transformer according to an embodiment of the present invention.

Meanwhile, each of the first winding 212, the second winding 222, and the third winding 232 formed separately from the different legs 112a, 112b, and 112c may have a first connection line 213 and a second connection line 223. ) And the third connection line 233.

1 outside the first winding 212, the second winding 222 and the third winding 232 wound on the outermost side of each of the first leg 112a, the second leg 112b, and the third leg 112c. The first winding 122a, the second winding 122b, and the third winding 122c of the difference coil 122 overlap with each other and are wound. The first winding 122a, the second winding 122b, and the third winding 122c of the primary coil 122 are connected in a Δ form with the connecting line 123.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. You will understand that. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

That is, the description in the embodiments of the present invention described above is merely exemplary, and the scope of the present invention may include both a hybrid transformer and a power supply system that can be derived from the overall gist of the present specification. That is, it is natural that the transformer and the system in which the main features of the present invention can be implemented in addition to the hybrid transformer and the power supply system having the structure described by way of example are included in the scope of the present invention. Therefore, both the hybrid transformer and the power supply system including a structure in which windings are wound in a plane perpendicular to a plane perpendicular to the axis of the legs constituting the iron core, that is, a structure in which a plurality of windings are wound around the core are wound. Can be included. In a zigzag transformer, a transformer including a structure wound by overlapping a plurality of windings may be included in the scope of the present invention regardless of the zigzag order, method, and number. In addition, a transformer including a structure wound by winding a plurality of windings on an iron core may be included in the scope of the present invention regardless of an insulation method, a constituent material, and a wiring method.

The hybrid transformer including the transformer function and the harmonic and current unbalance improvement according to the embodiments of the present invention and the power supply system including the same may be applied to all systems and structures in the art requiring the transformer. In addition, it can be applied not only to the transformer, but also to a technical field requiring harmonic reduction and unbalance improvement.

Claims (18)

In a transformer comprising a primary coil and a secondary coil, An iron core having a first leg, a second leg, and a third leg; A first winding, a second winding, and a third winding of a secondary coil wound around the first leg, the second leg, and the third leg by zigzag and connected to a neutral wire, wherein the first leg, the second leg, and In each of the third legs, two types of windings selected from the group including the first winding, the second winding, and the third winding are alternately wound, and wound around each of the first leg, the second leg, and the third leg. The two types of windings are enclosed and wound around the core in the winding order. The method of claim 1, The two types of windings alternately wound around each of the first leg, the second leg, and the third leg are wound in such a manner that the separation distance from the wound leg is increased in order of being wound. The method of claim 2, The winding wound first on each of the first leg, the second leg and the third leg is wound in contact with each leg. The method of claim 1, The two types of windings alternately wound around each of the first leg, the second leg, and the third leg are wound in an overlapping manner in a plane perpendicular to the axis of the leg in the order of winding. The method of claim 1, The first leg, the first winding, the second winding, the first winding is sequentially stacked and wound, The second leg, the second winding, the third winding, the second winding is sequentially stacked and wound, And a third winding, a first winding, and a third winding are sequentially stacked on the third leg. The method of claim 1, The first leg, the first winding, the second winding, the first winding, the second winding, the first winding is sequentially stacked and wound, In the second leg, a second winding, a third winding, a second winding, a third winding, and a second winding are sequentially stacked and wound up, And a third winding, a first winding, a third winding, a first winding, and a third winding are sequentially stacked on the third leg. The method of claim 1, The first winding is wound in the order of the first leg, the third leg and the first leg, The second winding is wound in the order of the second leg, the first leg and the second leg, And the third winding is wound in the order of the third leg, the second leg, and the third leg. The method of claim 1, The first winding is wound in the order of the first leg, the third leg, the first leg, the third leg and the first leg, The second winding is wound in the order of the second leg, the first leg, the second leg, the first leg and the second leg, And the third winding is wound in the order of the third leg, the second leg, the third leg, the second leg, and the third leg. The method of claim 1, The hybrid transformer of claim 1, wherein the primary coil is wound around the secondary coil wound around the outermost edge of each of the first leg, the second leg, and the third leg. The method of claim 1, The hybrid transformer is a hybrid transformer manufactured by an insulating method selected from the group consisting of dry, mold, inflow and gas. An iron core having a first leg, a second leg, and a third leg; And A first winding, a second winding, and a third winding wound zigzag around the first leg, the second leg, and the third leg, Each of the first leg, the second leg, and the third leg has a plurality of windings selected from the group including the first winding, the second winding, and the third winding, and the hybrid transformer is wound around the core in a winding order . The method of claim 11, The plurality of windings wound around each of the first leg, the second leg, and the third leg are wound in such a way that the separation distance from the wound leg is increased in the order of winding. The method of claim 11, The plurality of windings wound around each of the first leg, the second leg, and the third leg may be a hybrid in which two types of windings selected from the group including the first winding, the second winding, and the third winding are alternately wound. Transformers. The method of claim 11, The first winding, the second winding, and the third winding constitute a secondary coil of a transformer, and are wound around the outer side of the secondary coil wound around each of the first leg, the second leg, and the third leg. Hybrid transformer further comprising a primary coil. In a transformer comprising a primary coil and a secondary coil, An iron core having a first leg, a second leg, and a third leg; A first winding of a secondary coil wound in the order of the first leg, the third leg, the first leg, the third leg, and the first leg and connected to a neutral wire; A second winding of a secondary coil wound in the order of the second leg, the first leg, the second leg, the first leg, and the second leg and connected to a neutral wire; And And a third winding of the secondary coil wound in the order of the third leg, the second leg, the third leg, the second leg, and the third leg and connected to the neutral wire. In the first leg, a first winding, a second winding, a first winding, a second winding, and a first winding are sequentially stacked and wound up, A second winding, a third winding, a second winding, a third winding, and a second winding are sequentially stacked on the second leg, and wound up. And a third winding, a first winding, a third winding, a first winding, and a third winding are sequentially wound on the third leg. The method of claim 15, Each of the plurality of windings wound by being superimposed on each leg is wound by being superimposed on a plane perpendicular to the axis of the wound leg, respectively. Hybrid transformer wound up to increase the separation distance. The method of claim 15, A primary coil is disposed outside each of the first winding wound around the outermost side of the first leg, the second winding wound around the outermost side of the second leg, and the third winding wound around the outermost side of the third leg. Nested and wound hybrid transformers. 18. A power supply system comprising the hybrid transformer of claims 1-17.

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