KR20140067837A

KR20140067837A - 3-phase mold transformer with wound core

Info

Publication number: KR20140067837A
Application number: KR1020120135609A
Authority: KR
Inventors: 김형두
Original assignee: 현대중공업 주식회사
Priority date: 2012-11-27
Filing date: 2012-11-27
Publication date: 2014-06-05

Abstract

The present invention relates to a wound core three-phase molded transformer, comprising: a coil part composed of a first coil member, a second coil member, and a third coil member arranged in parallel with each other; and (i) a first coil member and a second coil member (Ii) a second iron core member continuously layered between the second coil member and the third coil member, and (iii) a second iron core member continuously layered between the first coil member and the third coil member, And an iron core part composed of a third iron core member continuously layered on the outer periphery of the first iron core member and the second iron core member between the coil members. This winding core three-phase mold transformer is formed into a winding-up type in which the iron core is continuously wound between the coils so that the fracture surface is minimized, thereby improving the flow of magnetic flux and the performance of transforming.

Description

{3-PHASE MOLD TRANSFORMER WITH WOUND CORE}

The present invention relates to a mold transformer, and more particularly, to a wound core three-phase mold transformer which is formed by winding up an iron core portion by stacking up the iron core portion, not by a red iron core.

Generally, a mold transformer is a device in which an iron core and a winding are not immersed in insulating oil but the winding is solid-insulated by using a resin such as epoxy. It is necessary to consider a transformer considering environmental pollution, fire safety, downsizing, light weight, and economical efficiency of maintenance in water distribution facilities such as factories, buildings, and industrial plants. The mold transformer has excellent electrical and mechanical characteristics and solves the problems of the induction type and dry type transformer, and its use is increasing accordingly.

Korean Patent Laid-Open Publication No. 10-1996-0079152 relates to a mold transformer, which comprises a step of winding a net-like stiffener capable of penetrating resin into an inner mold by a required inner resin thickness, and a step of winding a single winding wire, The method comprising the steps of: inserting a reinforcing member into a fixed inner mold and connecting the lead-out lead to a boss to be connected; connecting the boss connected to the lead-out lead to one side of the outer mold and assembling the mold; A step of forming a molding coil by injecting an epoxy resin into a vacuum mold, a step of laminating a coil molded with the resin, and a step of connecting the laminated coil, thereby minimizing the size of the coil molded with the resin The size of the vacuum mold apparatus becomes small, and the size of the coil itself molded by the resin during assembly is reduced to a conventional coil In addition, it can easily carry and assemble the coil because it is easy to do. Also, when the coil is damaged due to the abnormal condition when the mold is completed or when the transformer is installed, only the damaged coil is replaced. Therefore, the loss cost can be minimized. It simplifies and eliminates unnecessary processes, changes the mold structure, reduces the amount of epoxy resin, and improves workability.

On the other hand, such a conventional iron core three-phase mold transformer has a problem in that a large number of fracture surfaces are generated in the transformer iron core, resulting in the loss of magnetic flux, thereby deteriorating the transforming performance. Therefore, it is necessary to form the iron core of the mold transformer in a winding core type instead of the iron core type, thereby preventing loss of magnetic flux and improving the transforming performance.

Korean Patent Publication No. 10-1996-0079152

An embodiment of the present invention is to provide a wound core three-phase mold transformer in which an iron core of a three-phase mold transformer is formed in a continuous winding manner between respective coils.

One embodiment of the present invention is to provide a wound core three-phase mold transformer in which the joint surfaces of the respective iron core members of the three-phase mold transformer are closely contacted to minimize loss of magnetic flux.

An embodiment of the present invention is to provide a wound core three-phase mold transformer that smoothes the flow of magnetic flux by rounding the corners of the respective iron core members of the three-phase mold transformer.

Among the embodiments, the winding core three-phase mold transformer comprises a coil part composed of a first coil member, a second coil member, and a third coil member arranged in parallel with each other, and (i) a coil part comprising the first coil member and the second coil (Ii) a second iron core member continuously layered between the second coil member and the third coil member, and (iii) a second iron core member continuously layered between the second coil member and the third coil member, And an iron core part composed of a third iron core member continuously layered on the outer periphery of the first iron core member and the second iron core member between the member and the third coil member.

In one embodiment, the iron core portion may closely contact the joint surfaces of the first iron core member, the second iron core member, and the third iron core member.

In one embodiment, the iron core part rounds each corner of the first iron core member, the second iron core member, and the third iron core member.

In one embodiment, each of the first iron core member, the second iron core member, and the third iron core member may have sloped ends at both ends to minimize a fracture surface.

In one embodiment, each of the first iron core member, the second iron core member, and the third iron core member has a width ranging from 20 cm to 30 cm.

The three-phase wound core transformer according to the embodiment of the present invention can form the iron core portion in a winding-up manner so as to minimize the fracture plane, thereby smoothly flowing the magnetic flux and improving the transforming performance.

1 is a detailed view for explaining a three-phase wound core transformer according to one embodiment of the present invention.
Fig. 2 is a detailed view showing only the iron core portion of the wound core three-phase molded transformer shown in Fig.
Fig. 3 is an enlarged view showing a close contact surface of the first iron core member, the second iron core member, and the third iron core member shown in Fig. 2 on an enlarged scale.
FIG. 4 is an enlarged view showing an upper right upper end of the iron core member shown in FIG.
FIG. 5 is a detailed view showing a state before each of the first iron core member, the second iron core member and the third iron core member shown in FIG. 2 is bent and the slopes at both ends.

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. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

1 is a view for explaining a wound core three-phase mold transformer according to an embodiment of the present invention.

Referring to FIG. 1, a wound core three-phase mold transformer 100 includes a coil portion 110 and an iron core portion 120.

The coil part 110 is constituted by a first coil member 111, a second coil member 112 and a third coil member 113 in order to realize a three-phase transformer. Each coil member is formed by winding a coil in the form of a spring, and a voltage is converted by electromagnetic induction by flowing a high current.

The iron core part 120 is in the form of penetrating each of the coil members constituting the coil part 110. The iron core 120 serves as a passage through which the magnetic flux generated by the electromagnetic induction phenomenon can flow. The iron core unit 120 includes a first iron core member 121 formed between the first coil member 111 and the second coil member 112 and a second iron core member 121 formed between the second coil member 112 and the third coil member 113 A second iron core member 122 and a third iron core member 123 formed between the first coil member 112 and the third coil member 113.

FIG. 2 is a view showing only the iron core 120 in the wound core three-phase mold transformer shown in FIG.

Referring to FIG. 2, the first iron core member 121 is formed by continuously winding a bar-shaped iron core between the first coil member 111 and the second coil member 112. The first iron core 121 continuously wound forms a plurality of layers. The number of layers can vary depending on the size and performance of the transformer.

The second iron core member 122 is formed by continuously winding a bar-shaped iron core between the second coil member 112 and the third coil member 113. And its function and characteristics are the same as those of the first iron core member 121.

The third iron core member 123 is continuously wound around the outer edges of the first iron core member 121 and the second iron core member 122 between the first coil member 111 and the third coil member 113. The continuously wound third iron core member 123 forms a plurality of layers and is located at the outer edges of the first iron core member 121 and the second iron core member 122. Similarly, the number of layers of the third iron core member 123 may vary depending on the size and performance of the transformer.

3 is an enlarged view of only the portion of the iron core 120 shown in Fig. 2 where all of the first iron core member 121, the second iron core member 122 and the third iron core member 123 are in contact.

In one embodiment, the iron core 120 may be formed in such a manner that the joint surfaces of the first iron core 121, the second iron core 122, and the third iron core 123 are in close contact with each other. The third iron core member 123 is present at the outer edges of the first iron core member 121 and the second iron core member 122. Therefore, depending on the manufacturing method, an empty space in which the iron cores are not filled may occur at the portions where the three iron core members contact at the same time. In this case, the shape of the joint surface of each of the iron core members can be adjusted as necessary so that the joint surface can be minimized. Through this, the flow of magnetic flux in the transforming process will be smooth and the loss of magnetic flux can be minimized.

4 is an enlarged view of only the upper right corner of the front surface of the iron core 120 shown in FIG.

In one embodiment, the iron core 120 may be formed by rounding the corners of the first iron core 121, the second iron core 122, and the third iron core 133. Generally, in the iron core forming the transformer, there is an iron core which is formed by sequentially stacking E-shaped thin iron core members and a winding core which is formed by continuously winding a thin and long iron core member. The winding core has a smaller fracture surface than the iron core, so that flux of the magnetic flux is smooth, and loss of magnetic flux and power loss can be reduced. In the present embodiment, by rounding the corners of the respective iron core members, the flow of the magnetic flux becomes smoother and the characteristics of the winding core can be maximized.

Fig. 5 is a detailed view showing one of the respective iron core members.

Referring to FIG. 5, each of the iron core members before being bent is in the form of a thin and long rod-shaped. The thickness and length can be determined according to the characteristics of the wound core three-phase mold transformer to be manufactured. The iron core member is continuously wound through the coil. In this case, a robot arm or the like may be used for bending and shaping the iron core member.

In one embodiment, both ends of each iron core member may be formed as a slope. If the both ends are formed as slopes, the slope remains unchanged even after each iron core member is bent, whereby the slope can be minimized. If the fracture surface is minimized as described above, loss of magnetic flux and power loss can be minimized as described above.

In one embodiment, each of the first iron core 121, the second iron core 122 and the third iron core 123 may have a width ranging from 20 cm to 30 cm. When each of the iron core members is within the above range, the flux of magnetic flux is optimized in the transforming process in which a high current flows, and the transforming performance can be improved.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the present invention as defined by the following claims It can be understood that

100: Three-phase mold transformer
110:
111: first coil member
112: second coil member
113: third coil member
120: iron core part
121: first iron core member
122: second iron core member
123: third iron core member

Claims

A coil portion composed of a first coil member, a second coil member, and a third coil member arranged in parallel to each other; And
(i) a first iron core member continuously layered between the first coil member and the second coil member, (ii) a second iron core member continuously wound between the second coil member and the third coil member, And (iii) an iron core composed of a third iron core member continuously layered on the outer periphery of the first iron core member and the second iron core member between the first coil member and the third coil member A three-phase molded transformer comprising a core.

[2] The apparatus of claim 1,
Wherein the joint surfaces of the first iron core member, the second iron core member, and the third iron core member are brought into close contact with each other.

[2] The apparatus of claim 1,
Wherein the corners of the first iron core member, the second iron core member and the third iron core member are rounded.

[2] The apparatus of claim 1, wherein each of the first iron core member, the second iron core member,
And the two ends are sloped to minimize the fracture surface.

2. The three-phase winding type transformer of claim 1, wherein the first iron core member, the second iron core member and the third iron core member each have a width of 20 cm to 30 cm.