KR20070005158A - Transformer - Google Patents

Abstract

A transformer is provided to reduce power loss by removing current deviation generated in an output stage. A transformer includes a plurality of bobbins(124), and a bobbin installation part corresponding to the plurality of bobbins. A terminal installation part is arranged on both sides of the bobbin. The transformer includes more than two input stages(127) and more than two output stages(128). In the structure of a core, a first magnetic loop formation part(122b) is formed at an edge of a base part(122a) of both sides respectively, and a second magnetic loop formation part(122c) is formed in the center region.

Description

Transformers {TRANSFORMER}

1 is a view showing the structure of a transformer according to the prior art.

2 is a view showing the core structure of FIG.

Figure 3 is a plan view and equivalent circuit diagram showing the structure of a transformer according to the present invention.

Figure 4a is a perspective view showing the structure of a transformer according to the present invention.

4B illustrates the core structure of FIG. 4A.

5 illustrates a core structure according to another embodiment of the present invention.

6 is a plan view and an equivalent circuit diagram showing a structure of a transformer according to another embodiment of the present invention.

FIG. 7 illustrates various core structures applicable to FIG. 6. FIG.

8 is a plan view and an equivalent circuit diagram showing a structure of a transformer according to another embodiment of the present invention.

9 is a graph comparing the current deviation of the conventional transformer and the transformer of the present invention.

* Description of the symbols for the main parts of the drawings *

12: base portion 13: self-forming portion

14: bobbin mounting section 15: bobbin

16: terminal mounting section 108a: first bobbin mounting section

108b: second bobbin mounting portion 112: terminal mounting portion

122: core 122a: base portion

122b: first growth path forming unit 122c: second growth path forming unit

The present invention relates to a transformer for use in a small display device.

Recently, with the development of display devices, LCD monitors and LCD TVs are widely used, and research and development for thinning of display devices are being conducted.

In order to reduce the thickness of the display device, it may be regarded as one of the representative problems to thin the transformer having a large thickness among the internal components of the display device.

The transformer is mounted in an inverter that supplies power to light lamps in a direct type LCD module, and performs a proper boosting operation to light up a plurality of lamps.

1 is a view showing the structure of a transformer according to the prior art.

As shown in FIG. 1, the structure of the transformer is largely composed of a bobbin 15 having first and second cores 10 and 10 ′ and a coil (not shown) wound.

The cores 10 and 10 'have an' E 'shape, a magnetic path forming portion 13 having magnetic fields formed at both edges of the base portion 12, and a bobbin mounting portion protruding from the central region ( 14).

That is, the path forming portion 13 is formed to extend from both ends of the base portion 12, respectively, the bobbin mounting portion 14 is formed to extend from the center of the base portion 12.

And the bobbin 15 is wound around the coil (not shown) is assembled so that the bobbin mounting portion 14 is inserted into the inner wrap around the bobbin mounting portion 14, the inside of the bobbin 15 The bobbin mounting portions 14 of the first and second cores 10 and 10 'face each other.

In addition, the coil wound on the bobbin 15 may be divided into several parts and configured to enable partial pressure. Reference numeral 16 is a terminal mounting portion of the bobbin 15.

FIG. 2 is a diagram illustrating the core structure of FIG. 1.

As shown in FIG. 2, the first core 10 and the second core 10 ′ have an 'E' shaped structure and have a growth path 13 formed at both edges of the bobbin mounting part 12 at the center thereof. ) Is extended and the bobbin mounting part 14 is extended to the center area | region.

As such, since the first core 10 and the second core 10 ′ are inserted at both sides of the bobbin 15, the bobbin mounting portions 14 face each other.

However, by using the two cores as described above, each of them generates a current in the output terminal corresponding to the input terminal, the magnetic field value generated from each core is not the same, there is a problem that the output deviation occurs.

As such, when an output deviation occurs, different lamp currents are applied to the lamps respectively connected to the transformer output terminals of the inverter, thereby changing the lamp brightness.

In addition, since the two cores separated as described above light up respective lamps, the magnetic field efficiency of the transformer is lowered and the loss is increased.

Accordingly, an object of the present invention is to solve the problems of the prior art, and an object thereof is to provide a transformer capable of eliminating current deviation generated at an output stage and reducing power loss.

In order to achieve the above object, a transformer according to the present invention,

A plurality of bobbins;

A bobbin installation unit corresponding to the plurality of bobbins;

A terminal mounting part disposed on both sides of the bobbin; And

And a core disposed around the plurality of bobbins, the core having a base portion and a magnetization portion formed thereon.

According to the present invention, by changing the core structure to form a symmetrical magnetic field while being assembled to a plurality of input terminals or one input terminal and a plurality of output terminals corresponding thereto, it is possible to eliminate the current deviation generated in the output terminal.

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

3 is a plan view and an equivalent circuit showing the structure of a transformer according to the present invention.

As shown in FIG. 3, (a) is a plan view of a transformer according to the present invention, and includes an integral core 122 and bobbins 124 wound around coils (not shown).

(b) is an equivalent circuit of the transformer, and two input terminals 127 are formed with one input voltage, and two output terminals 128 are formed to correspond thereto.

An integrated core is disposed between the input terminal 127 and the output terminal 128, and lamps LAMP1 and LAMP2 are connected to the two output terminals 128, respectively.

In the present invention, the core 122 has a 'day' shaped structure, and base portions 122a are disposed at both sides, and between the base portions 122a, the first magnetic growth portion 122b and the second magnetic growth portion are formed. 122c is integrally connected.

Therefore, when the core 122 in the present invention is used, the same magnetic field is formed in the magnetic path forming portions on both sides (core A region and core B region), so that current deviation on the output side does not occur. See)

Figure 4a is a perspective view showing the structure of a transformer according to the present invention.

As shown in FIG. 4A, two input terminals and two output terminals are formed, and a bobbin 124 is disposed between the input terminal and the output terminal, respectively.

Terminal mounting portions 112 are disposed on both sides of the bobbin 124, and the first bobbin mounting portion 108a and the second bobbin mounting portion 108b are inserted into the bobbin 124.

In addition, an integrated core 122 is assembled to the bobbin 124.

In the integrated core 122 of the present invention, the first magnetic path forming part 122b and the second magnetic path forming part 122c are integrally connected between both base parts 122a.

That is, both base portions 122a of the integrated core 122 according to the present invention have a structure in which all of the base portions 122a are integrally formed together with the first magnetic growth portion 122b and the second magnetic growth portion 122c.

FIG. 4B is a diagram illustrating the core structure of FIG. 4A, and illustrates a magnetic field direction according to the current I direction as shown. FIG.

Due to the current flowing through the second magnetic path forming part 122c of the core 122, two magnetic fields are formed through the first magnetic path forming part 122b formed at both sides via the core 122 and the base part 122a. A magnetic field of the same size is formed in the input / output region of.

That is, the same magnetic field size and direction are formed on both sides of the first magnetic path forming unit 122b, so that the current value on the output side is the same.

Therefore, in the transformer according to the present invention, since the magnitude and flow of the magnetic field generated in the pair of input and output terminals are symmetrical and the same, the current of the output terminal is the same, so that there is no output deviation.

5 is a view illustrating a core structure according to another embodiment of the present invention. As shown in FIG. 4B, the core 133 structure is different from that of the base portion and the self-forming portion formed integrally with each other. The first base part 133a and the second base part 122d were formed independently.

The first growth path forming unit 133b is formed at both edges of the first base unit 133a, and the second growth path forming unit 133c is extended to the center region of the first base unit 133a.

Although shown in the figure, 134 which is not described is a bobbin.

Therefore, although the structure is different from that of the core structure of FIG. 4B, the magnetic field formed in the core 133 of the present invention is formed on both sides of the first magnetic path formation centering on the second magnetic path forming unit 133c as shown in FIG. 4B. The magnetic field of the same magnitude | size and a direction is formed in the part 133b, respectively.

Therefore, there is an advantage that the current deviation generated in the output terminal as shown in Figure 4b is reduced.

6 is a plan view and an equivalent circuit diagram illustrating a structure of a transformer according to another embodiment of the present invention.

As shown in FIG. 6, (a) is a plan view of a transformer according to another embodiment of the present invention, in which four output terminals are configured at one input terminal.

As shown in FIG. 3, a first growth path forming unit 222b is integrally formed between the edges of both base parts 222a, and three second growth path forming units (B) are formed between the first growth path forming units 222b. 222c is integrally formed with the base portion 222a located at both sides.

Therefore, another embodiment of the present invention has a structure of the "目" form.

It can be seen that the magnetic field direction formed in the core 222 is formed to extend continuously from the magnetic field and the current direction formed in the core having two output terminals shown in FIG. 4B.

That is, when current flows in the direction of the input end from the second magnetic path forming unit 222c formed at the lower end of the upper first magnetic path forming unit 222b of the core 222, the upper first magnetic path forming unit is formed along the base unit 222a. A magnetic field flows downwardly from the portion 222b and the base portion 222a.

In addition, when current flows from the second magnetic path forming unit 222c formed at the upper end of the lower first magnetic path forming unit 222b of the core 222 toward the input end direction, the lower first magnetic path forming unit along the base part 222a is formed. 222b and the magnetic field flow in an upward direction of the base portion 222a.

Therefore, in the transformer according to another embodiment of the present invention, since the two magnetic fields on each side of the four output stages have the same direction and the same magnitude value, the same magnetic field shape is formed in each of the four output stages. The deviation is very small.

Therefore, there is an advantage that can significantly reduce the current deviation failure of the output stage, which occurred in the prior art.

(b) is an equivalent circuit of a transformer having four output stages for the one input unit. In one input unit, four separate input stages are formed so as to correspond to four divided output stages. Equivalent to

Lamps LAMP1, LAMP2, LAMP3, and LAMP4 are electrically connected to the four output terminals, respectively.

According to the magnetic field of FIG. 6A, four lamps may generate light having the same size to improve product reliability of the inverter.

FIG. 7 is a diagram illustrating various core structures applicable to FIG. 6.

As shown in FIG. 7, there are illustrated various core structures that can be applied to a transformer having four output stages so as to separate four input stages and correspond to one input unit described in FIG. 6.

Although the structure of the core is slightly different from the structure in which the magnetic path forming portions are integrally formed between the two base portions described with reference to FIG. 6, the cores have the same direction and shape at both ends of the core as shown in FIG. Since the magnetic field is formed, the deviation of the output stage can be reduced.

(a) has a structure in which the entire core is formed in a rectangular shape, and inside the core, a bobbin mounting portion is inserted into the bobbin at predetermined intervals.

Therefore, since magnetic fields are formed along the magnetic path forming parts formed at both ends of the core, the same magnetic fields are formed on both sides of the core.

Therefore, the output stage outputs the same current value to each other to minimize the current deviation of the output stage.

The core of (b) separates the base into two and forms three rulers integrally inside one base, and the bobbin mounting portions are positioned at both edge regions so that both sides have the same magnetic field size and direction with respect to the center. It was to have.

In the core structure of (c), three magnetic path forming parts are integrally formed inside one base part, and three magnetic path forming parts are integrally formed inside another base part.

And the bobbin mounting portion is located in both edge regions of the base portion.

Since the base part is assembled to face each other, two cores are used, but magnetic fields of the same size and direction are formed on both sides of the core.

The core structure of (d) has a structure in which both edges of the core are opened by integrally forming three magnetic path forming portions inside one base portion and disposing a base portion corresponding thereto.

Similarly, since the magnitude of the magnetic field and the direction of the magnetic field formed on both sides of the center region are the same, the current variation of the output terminal is reduced.

In the core structure of (e), two magnetic path forming parts are integrally formed inside one base part, and one magnetic path forming part is integrally formed inside another base part.

Similarly, the core has a structure in which both edge regions of the base portion are opened, and the same magnetic field size and magnetic field direction are formed in both regions with respect to the center region, thereby reducing the current deviation of the output terminal.

In the core structure of (f), four magnetic path forming parts are integrally formed in an inner region of one base part, and a corresponding magnetic part is formed in the base part and the base part corresponding thereto.

In the core structure of (g), two magnetic path forming parts are formed inside one base part, and three magnetic path forming parts are formed inside another base part.

Therefore, in the core structure of (f) and (g), both edge regions are formed into the closed.

In addition, since both sides have the same value in both the magnetic field size and the magnetic direction, the current deviation of the output terminal is reduced.

8 is a plan view and an equivalent circuit diagram illustrating a structure of a transformer according to another embodiment of the present invention.

As shown in FIG. 8, (a) shows a structure of a core 333 of a transformer having four outputs corresponding to one input, and (b) shows a transformer having four outputs corresponding to one input. An equivalent circuit of is shown.

A first magnetic path forming part 333b is integrally formed in both edge regions of the first base part 333a of the core 333, and a second magnetic path forming part is formed between both sides of the first magnetic path forming part 333b. 333c are integrally formed.

The second base part 333d is formed independently to correspond to the first base part 333a.

A first input terminal is disposed at the center of the core 333, and four output terminals are disposed at both core spaces.

Accordingly, the same magnetic field size and magnetic field direction are formed on both sides of the center region of the core 333, thereby minimizing current variation in the output terminal.

9 is a graph comparing the current deviation of the conventional transformer and the transformer of the present invention.

As shown in FIG. 9, a graph having a wide curved interval on the left is a current deviation generated in a conventional transformer, and a graph having a compact curved interval on the right is a current deviation generated in a transformer of the present invention.

In the conventional transformer, it is possible to see that the current deviation is large because the interval of the curve is large, but in the transformer of the present invention, the curve is very tight and the current deviation is small.

Therefore, it can be seen that the output values output from the transformer mounted inverter output current values of similar magnitudes to drive the lamps with a small current deviation.

Therefore, there is an advantage that the magnitude of the current supplied to the lamp becomes very uniform, thereby increasing the reliability of the inverter.

As described in detail above, the present invention can remove the current deviation generated in the output terminal by changing the core structure to form a symmetric magnetic field while being assembled to a plurality of input terminals or one input terminal and a plurality of output terminals corresponding thereto. It works.

The present invention is not limited to the above-described embodiments, and various changes can be made by those skilled in the art without departing from the gist of the present invention as claimed in the following claims.

Claims (9)

A plurality of bobbins; A bobbin installation unit corresponding to the plurality of bobbins; A terminal mounting part disposed on both sides of the bobbin; And A transformer disposed around the plurality of bobbins, the core having a base portion and a magnetization portion formed therein. The method of claim 1, The transformer comprises two or more inputs and two or more outputs. The method of claim 1, The transformer comprises a single input and four outputs. The method of claim 1, The core has a structure in which a first growth mechanism is integrally formed at edges of base portions on both sides, and a second growth mechanism is integrally formed in a central region. The method of claim 1, The structure of the core is a transformer, characterized in that the first magnetic path forming portion is integrally formed at each of the edges of the base portion on both sides, and the plurality of second magnetic path forming portions are integrally formed between the first magnetic path forming portion. The method of claim 1, The core has a transformer having the same magnetic field direction and size on both sides of the center region. The method of claim 6, Transformers, characterized in that the same magnetic field is formed on both sides of the core to generate a current value of the same magnitude in the output terminal. The method of claim 1, The structure of the core is a transformer, characterized in that '日' structure. The method of claim 1, The core structure is a transformer, characterized in that the "目" structure.

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