KR101675873B1 - A transformer - Google Patents

Abstract

The present invention relates to a secondary coil having a primary coil and a secondary coil wound around an iron core at a distance from each other; And a chaos prevention plate disposed to surround the iron core and located between the primary coil and the secondary coil, wherein the chaos prevention plate includes a first chaos prevention plate and a second chaos prevention plate, And a second interference preventing plate spaced apart from the first interference preventing plate by a predetermined distance. By changing the structure of the interference preventing plate, it is possible to prevent the transformer from burning out due to heat generation of the interference preventing plate.

Description

Transformer {A TRANSFORMER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer, and more particularly, to a transformer including a mixture prevention plate preventing interference between a primary coil and a secondary coil.

Typically, a transformer is a transformer that includes coils (primary windings and secondary windings) that are wound around an iron core to induce currents in the secondary windings by increasing and decreasing the magnetic force lines as the currents flowing through the primary windings change. It is a device that uses induction action.

In addition, the transformer receives AC power from one or two or more circuits and modifies the voltage and current by an electromagnetic induction action to supply AC power of the same frequency to the other one or two or more circuits.

On the other hand, in the transformer as described above, a primary coil (primary winding) and a secondary coil (secondary winding) are wound around the iron core of the transformer with an interval therebetween and are provided so as to surround the iron core, And a mixture prevention plate disposed between the primary coil and the secondary coil. At this time, the primary coil and the secondary coil may be referred to as a low-voltage winding or a high-voltage winding, respectively.

That is, although the interference between the primary coil and the secondary coil is prevented through the interference prevention plate as described above, there is a problem that the transformer is burned out due to the heat generation of the interference prevention plate.

Korean Patent Publication No. 10-2011-0027198

SUMMARY OF THE INVENTION It is an object of the present invention to provide a contact prevention plate that can prevent burn-out of a transformer due to heat generation of a contact prevention plate preventing interference between primary and secondary coils of a transformer.

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

In order to solve the above-mentioned problems, the present invention provides a transformer comprising: a primary coil and a secondary coil wound around an iron core at a distance from each other; And a chaos prevention plate disposed to surround the iron core and located between the primary coil and the secondary coil, wherein the chaos prevention plate includes a first chaos prevention plate and a second chaos prevention plate, And a second interference preventing plate positioned at a predetermined distance apart from the first interference preventing plate.

In addition, the present invention provides a transformer including a ground lead wire connected to the first interception preventing plate and the second interception preventing plate.

The present invention also relates to a secondary coil, a primary coil and a secondary coil wound around the iron core with a gap therebetween. And a mixture preventing plate disposed between the primary coil and the secondary coil so as to surround the iron core, wherein the mixture preventing plate comprises a transformer in the form of a mesh formed by crossing two or more conductors, Lt; / RTI >

According to the present invention as described above, by changing the structure of the interference preventing plate, it is possible to prevent burning of the transformer due to heat generation of the interference preventing plate.

1 is a schematic view showing an external iron-type transformer having a general structure.
2 is a sectional view showing a part of a transformer having a general structure.
FIG. 3 is a perspective view showing a part of a transformer including a general-purpose interference preventing plate. FIG.
FIG. 4A is a perspective view showing a part of a transformer including the interference preventing plate according to the first embodiment of the present invention, FIG. 4B is a perspective view showing a part of the transformer including the interference preventing plate according to the second embodiment of the present invention, .

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. &Quot; and / or "include each and every combination of one or more of the mentioned items. ≪ RTI ID = 0.0 >

Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms " comprises "and / or" comprising "used in the specification do not exclude the presence or addition of one or more other elements in addition to the stated element.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

The terms spatially relative, "below", "beneath", "lower", "above", "upper" And can be used to easily describe a correlation between an element and other elements. Spatially relative terms should be understood in terms of the directions shown in the drawings, including the different directions of components at the time of use or operation. For example, when inverting an element shown in the figures, an element described as "below" or "beneath" of another element may be placed "above" another element . Thus, the exemplary term "below" can include both downward and upward directions. The components can also be oriented in different directions, so that spatially relative terms can be interpreted according to orientation.

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

1 is a schematic view showing a transformer having a general structure.

Referring to FIG. 1, a transformer 100 having a general structure includes an iron core 2 and a coil portion 1 wound around the iron core portion 2, the coil portion including a primary coil and a secondary coil can do. At this time, the transformer may be defined as an external iron-type transformer.

The iron core unit may include a plurality of iron cores, and may include four iron cores as shown in the figure.

The iron core part may be formed of a magnetic material selected from the group consisting of silicon steel, permalloy and ferrite, and may have a required thickness. However, the present invention does not limit the material of the iron core part.

The primary coil is spirally wound on the outer circumferential surface of the iron core. When the AC voltage is applied to the primary coil, the primary coil is converted into an arbitrary voltage. When the coil is wound around the primary coil, the primary coil becomes stronger.

In this case, the primary coils are formed by winding a plurality of coils in the horizontal direction on the iron core portion, and spacers made of an insulating material are inserted between the primary coils stacked in the horizontal direction at regular intervals Space can be formed.

The secondary coil may be made of a hollow copper or aluminum material, and may be formed by stacking a plurality of coils wound about two times or three times around one end, and may be wound on the outer circumferential surface of the primary coil at a predetermined interval.

The structure of the iron core portion and the coil portion is self-evident in the art, and the structure of the iron core portion and the coil portion is not limited in the present invention.

1, an upper fastening part 120 positioned on the upper side of the iron core part 2 and a lower fastening part 120 located on the lower side of the iron core part 2 and corresponding to the upper fastening part, And a fastening portion (not shown).

The upper fastening part 120 includes a vertical upper fastening part 120c arranged in the vertical direction and a horizontal upper fastening part 120b arranged in the horizontal direction and the upper fastening part 120c extending from the vertical upper fastening part 120c, And an upper fastening part second fastening part 120a positioned at an end of the first fastening part 120d and the upper fastening part 120. [

The lower fastening portion may be disposed symmetrically with the upper fastening portion. For example, the lower fastening portion may include a vertical lower fastening portion disposed in a vertical direction and a horizontal lower fastening portion disposed in a horizontal direction, And a lower fastening portion first fastening portion extending from the lower fastening portion and a lower fastening portion second fastening portion located at an end of the lower fastening portion.

As shown in FIG. 1, the first fastening portion 120d and the first fastening portion may include a first coupling means 10 for coupling the first fastening portion 120d and the lower fastening portion first fastening portion, By joining the upper and lower fasteners through the coupling means 10, it is possible to provide a force to overcome the vertical mechanical forces.

And a side plate portion 110 connected to the upper fastening portion and the lower fastening portion.

Here, the side plate portion includes a first side plate portion 110 and a second side plate portion (not shown) positioned in a region corresponding to the first side plate portion. As shown in the figure, The first side plate portion 110 and the second side plate portion may be fixed to the upper fastening portion and the lower fastening portion by second engaging means 20, respectively.

Meanwhile, when the side plate is fixed to the upper fastening part and the lower fastening part, the upper fastening part can be fastened to the second fastening part 120a and the lower fastening part second fastening part.

The structures of the upper and lower fasteners and the structure and shape of the side plates are obvious in the art, and the present invention does not limit these structures and forms.

2 is a sectional view showing a part of a transformer having a general structure.

Referring to FIG. 2, a general transformer has a primary winding 120 and a secondary winding 150 wound around the iron core 110 and a secondary winding 150, (130) installed between the primary coil (120) and the secondary coil (150) so as to surround the secondary coil (110).

On the other hand, the primary coil and the secondary coil may be referred to as a high-voltage winding or a low-voltage winding, respectively, and the present invention is not limited to these names.

Generally, the interference preventing plate may be composed of a conductor of about 0.1 to 0.2 mm, which is located between the high-voltage and low-voltage windings, and means that the high-voltage and low-voltage windings can be electrostatically shielded and grounded.

Also, a transformer incorporating the interference prevention plate is referred to as a built-in interference prevention transformer.

When the insulation between the high-voltage winding and the low-voltage winding of the transformer is broken, the grounding current transmitted to the low-voltage side flows through the ground of the anticorrosive plate to prevent the potential of the low-voltage circuit from rising. It is possible to prevent damages such as burnout and shrinkage.

In addition, an abnormal voltage such as a brain impulse voltage drawn from the high-voltage side can be transmitted to the low-voltage winding through the magnetic path of the formed iron core. When the gap between the two windings is shielded by the interference prevention plate, .

Because of this feature, the built-in anti-interference transformer can be used as a power transformer for semiconductor power conversion devices, explosion-proof structure transformers, power transformers for control / information devices, and power transformers for ungrounded low voltage circuits.

FIG. 3 is a perspective view showing a part of a transformer including a general-purpose interference preventing plate. FIG.

Referring to FIG. 3, as described above, a general transformer has a primary coil 120 and a secondary coil (not shown) wound around the iron core 110 with a gap therebetween, and the iron core 110 And a mixture prevention plate 130 disposed between the primary coil 120 and the secondary coil (not shown). In this case, the secondary coil is omitted in FIG. 3 for convenience of explanation.

In addition, the interference preventing plate 130 may include a ground lead wire 140 for grounding.

That is, when the insulation is broken between the primary coil (high voltage winding) and the secondary coil (low voltage winding) of the transformer, the grounding current transmitted to the low voltage side is connected to the ground lead wire 140, thereby preventing the rise of the potential of the low-voltage circuit. Thus, it is possible to prevent damage to the low-voltage device such as burnout and contraction.

At this time, in the general-purpose interference preventing plate, one conductor plate is provided in a structure in which the primary coils are wound one after another.

However, as described above, the interference preventing plate prevents the primary coil and the secondary coil from coming into contact with each other, but there is a problem that the transformer is burned out due to heat generation of the interference preventing plate.

Therefore, the applicant of the present invention intends to prevent the transformer from burning out due to heat generation of the interference preventing plate through the new structure of the interference preventing plate.

FIG. 4A is a perspective view showing a part of a transformer including the interference preventing plate according to the first embodiment of the present invention, FIG. 4B is a perspective view showing a part of the transformer including the interference preventing plate according to the second embodiment of the present invention, .

Referring to FIG. 4A, the transformer including the interference preventing plate according to the first embodiment of the present invention includes a primary coil 220 and a secondary coil (not shown) spaced apart from each other around the iron core 210, And an interference preventing plate 230 installed to surround the iron core 210 and positioned between the primary coil 220 and the secondary coil (not shown). At this time, the secondary coil is omitted in FIG. 4A for convenience of explanation.

The interference preventing plate 230 according to the first embodiment of the present invention includes a first interception preventing plate 230a, a second interception preventing plate 230b spaced apart from the first interception preventing plate 230a by a predetermined distance, And a third interference preventing plate 230c spaced apart from the second interference preventing plate 230b by a predetermined distance.

And may include a ground lead 240 connected to the first and second interference preventing plates 230a, 230b, and 230c.

In this case, although FIG. 4A shows that the interference preventing plates are separated into three, in the present invention, the mixture preventing plates may be separated into at least two or more.

Referring to FIG. 4B, the transformer including the interference preventing plate according to the second embodiment of the present invention includes a primary coil 320 and a secondary coil (not shown) spaced apart from each other around the iron core 310, And a contact prevention plate 330 installed to surround the iron core 310 and positioned between the primary coil 320 and the secondary coil (not shown). In this case, the secondary coil is omitted in FIG.

And may include a ground lead 340 connected to the interference preventing plate 330.

In this case, the interference preventing plate 330 according to the second embodiment of the present invention is a mesh network in which two or more conductors cross each other.

According to the present invention as described above, it is possible to detect that there is a certain spacing between the interference prevention plate and the interference prevention plate by separating the interference prevention plate into at least two or more of the plurality of the interference prevention plates according to the first embodiment of the present invention have.

Further, in the interference preventing plate according to the second embodiment of the present invention, since the interference preventing plate is in the form of a mesh, it can be seen that there is a plurality of spaces in the interference preventing plate.

Hereinafter, the calorific value will be determined based on the interference preventing plate according to the first embodiment.

The following equation (1) represents an amount of heat generation (temperature rise) due to an eddy current.

... Equation (1)

Where b is the thickness of the conductor, B is the magnetic flux density, F is the frequency, n is the number of conductors, r is the resistance of the conductor, k is a constant, (8.4 /?))

In the equation (1), the conditions of the thickness of the conductor, the magnetic flux density, the frequency (60HZ), the resistance of the conductor, and the condition of the conductor k are the same and the calorific value of the structure according to the first embodiment is compared with that of the structure Respectively.

First, the conditions of the thickness of the conductor, the magnetic flux density, the frequency (60HZ), the resistance of the conductor, and the condition of the k are the same and it is designated as a constant Q. The width of the conductor in the general- When the number of sifters is 1, the width of the conductor in the first embodiment is 50, the number of conductors is 3, and the spacing between the conductors is 25.

That is, the number of conductors having a width of 50 is three, and the spacing between the three conductors is 25 * 2, so that the actual occupied area of the anticorrosive plate of the general structure is the same as that of the first embodiment.

When the calorific value is calculated in this manner, the calorific value W1 in the general structure is Q * 200 / (1), which corresponds to Q * 200 DEG C, and the calorific value W2 in the first embodiment is Q * 50 / , Q * corresponds to 16.667 ° C.

Therefore, in the case of the first embodiment, it can be seen that the heat generation amount is about 8.3% of the general structure.

These results can be derived from the following reasons.

In other words, the overheating of the interference preventing plate is affected by the leakage magnetic flux in the radial direction. Therefore, in order to lower the influence, it is important to narrow the width of the conductor receiving the leak magnetic flux in the radial direction of the interference preventing plate.

In addition, by increasing the number of conductors, it is possible to prevent overheat by eddy currents and to prevent the transformer from being burned down due to deterioration of insulation by lowering the allowable temperature.

In the present invention as described above, by changing the structure of the interference preventing plate, it is possible to prevent burning of the transformer due to heat generation of the interference preventing plate.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

Claims (3)

A primary coil and a secondary coil wound around the iron core with a gap therebetween; And
And an anticorrosive plate provided to surround the iron core and positioned between the primary coil and the secondary coil,
Wherein the interference preventing plate includes a first interception preventing plate and a second interception preventing plate spaced apart from the first interception preventing plate by a predetermined distance,
Wherein the first and second interference preventing plates are connected to one ground lead at the same time. delete delete

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