KR20090104298A - Embedding-Type Multi-Output Transformer - Google Patents

Abstract

PURPOSE: An embedded multi-output transformer is provided to prevent an insulation problem of a high voltage output and a balance problem of an output current by inserting a first bobbin and n second bobbins into insertion holes. CONSTITUTION: An embedded multi-output transformer includes a first bobbin(10), a second bobbin(11), a first coil(15), a second coil(16), and a pair of cores(12). One first winding(13) with one input terminal and one ground terminal is formed in the first bobbin. N second windings with two output terminals are formed in the second bobbin. The first coil is wound around the first winding. The second coils are wound around the n second windings respectively. The first bobbin is inserted into the insertion hole formed in the second bobbin. The pair of cores are inserted into the insertion hole formed in the first bobbin.

Description

Embedding-Type Multi-Output Transformer

The present invention relates to a transformer, and more particularly, to a multi-output transformer inserted into an insertion hole formed in a secondary bobbin forming a primary side forming a primary side.

Today, with the development of display technology, a monitor, which is a liquid crystal display (LCD), is widely used in a computer or other display device field. Compared with a CRT (Cathode-ray Tube) monitor, the LCD monitor has the advantage of slimmer longitudinal section and less flicker. The LCD monitor has a fluorescent lamp driven at a high pressure for a backlight system requiring a back light module.

On the other hand, an inverter with a driving circuit is used to drive the fluorescent lamp, which has a high-voltage transformer, which generates a high AC output voltage with a low AC input voltage, thereby providing a voltage to the lamp constituting the LCD panel. Serves to supply

Conventional transformers drive one transformer to power one lamp, but drive an external electrode fluorescent lamp (EEFL) or a cold cathode fluorescent lamp (CCFL) in parallel. It powers several lamps by driving several transformers.

Meanwhile, as the LCD TV or monitor market matures and the selling price falls, the price of components related to the backlight unit is gradually falling.

Therefore, due to the price pressure of the parts related to the backlight unit, efforts have been made to reduce the number of parts and the unit price, and as a part of this effort, there are movements to develop a product capable of driving multiple lamps with one transformer. It is actively underway.

According to the present invention, a primary bobbin forming one primary side is inserted into an insertion hole formed in a secondary bobbin forming n (n: positive) secondary sides, thereby efficiently extracting multiple outputs from one transformer according to electrical characteristics. An object of the present invention is to provide an insertable multi-output transformer.

An insertion type multi-output transformer according to the present invention comprises: a primary bobbin having one primary winding having one input terminal and one ground terminal; A secondary bobbin having n (n: positive) secondary windings each having two output terminals; A primary coil wound around the one primary winding part; A secondary coil wound around the n secondary windings, respectively; And a pair of cores, wherein the primary bobbin is inserted into an insertion hole formed in the secondary bobbin, and the pair of cores are inserted into an insertion hole formed in the primary bobbin.

In the present invention, the one input terminal and the one ground terminal may be located at both ends of the primary winding.

In the present invention, both output terminals of the secondary winding may be located in the same direction.

In the present invention, the two output terminals may be located at both ends of the secondary winding.

In the present invention, the primary coil may be configured such that the winding starts from the input terminal of the primary winding part and the winding ends at the ground terminal.

In the present invention, the secondary coil may be configured such that the winding starts from one output terminal of the secondary winding part and the winding ends at the other output terminal.

An insertion type multi-output transformer according to the present invention comprises: a primary bobbin having one primary winding having one input terminal and one ground terminal; A secondary bobbin in which n (n: positive) secondary windings each having two output terminals in the same direction are formed; A primary coil wound around the one primary winding part; A secondary coil wound around the n secondary windings, respectively; And a pair of cores, wherein the primary bobbin is inserted into an insertion hole formed in the secondary bobbin, and a pair of cores are inserted into an insertion hole formed in the primary bobbin, and the secondary bobbin includes the two outputs. (N + 1) (n: positive) auxiliary terminals in opposite directions to the terminals, and the auxiliary terminals are located at both ends of each secondary winding part.

In the present invention, the secondary coil may be configured such that the winding starts from the auxiliary terminal of the secondary winding part and the winding ends at any one of the two output terminals of the secondary winding part.

In the present invention, the core may be a "U" shaped core.

The insert-type multi-output transformer according to the present invention made as described above is configured such that the primary bobbin forming one primary side is inserted into an insertion hole formed in the secondary bobbin forming n (n: positive) secondary sides, thereby outputting It can solve the problem of current balance and insulation of high voltage output, and it can reduce the requirement of transformer by efficiently extracting multiple outputs from one transformer according to electrical characteristics.

Hereinafter, with reference to the embodiments of the present invention shown in the accompanying drawings will be described in detail the present invention. However, the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art. Accordingly, the shape and size of elements in the drawings may be exaggerated for clarity, and the elements denoted by the same reference numerals in the drawings are the same elements.

Example 1

1 is a plan view of an insertion type multi-output transformer in which a primary bobbin is inserted into an insertion hole in a secondary bobbin in which two secondary windings are formed, and FIGS. 2 and 3 illustrate the insertion type multi-output transformer. Figure shows an equivalent circuit of.

Referring to FIG. 1, an insertion type multi-output transformer in which a primary bobbin is inserted into an insertion hole in a secondary bobbin in which two secondary windings are formed, has one primary winding 13 formed therein. The primary bobbin 10, the secondary bobbin 11 formed with two secondary windings 14, the primary coil 15 wound on the primary winding 13, the two secondary windings Secondary coil 16 wound around 14, and core 12.

One primary winding 13 formed on the primary bobbin 10 may include one input terminal 17a and one ground terminal 17b. The primary voltage is applied through the input terminal 17a, and the input terminal 17a and the ground terminal 17b may be located at both ends of the primary winding unit 13.

A primary coil 15 is wound around the primary winding 13 of the primary bobbin 10, and the primary coil 15 is wound from an input terminal 17a of the primary winding 13. It can be configured to start and end the winding at ground terminal 17b.

Two secondary windings 14 formed on the secondary bobbin 11 may include two output terminals 18a to 18d, respectively. The two output terminals 18a to 18d of each of the secondary windings 14 may be located in the same direction. In addition, the two output terminals 18a and 18b may be located at both ends of the secondary winding 14.

A secondary coil 16 is wound around each secondary winding 14 of the secondary bobbin 11, and the secondary coil 16 is connected from one output terminal 18a of the secondary winding 14. The winding may be started and configured to end the winding at the other output terminal 18b.

Referring to FIGS. 2 and 3, through the above-described configuration, even if four conventional transformers can be used to drive four lamps or two "U" lamps through one transformer, Can be. Therefore, the cost is reduced by a quarter compared with the driving of the conventional transformer, and the size of the product using the transformer can be made smaller than the conventional.

The primary bobbin 10 is inserted into the insertion hole formed in the secondary bobbin 11 so as to be spaced apart from each other, thereby ensuring sufficient insulation separation distance in relation to the printed circuit board to be electrically connected to the transformer. It is possible to suppress the generation of the return wire on the high voltage output side which has caused many problems in the past, so that the noise caused by the high voltage output side and the return wire insulation problem and the return wire are not generated, and the waveform of the output current is not distorted.

In addition, the primary bobbin 10 having the same length as that of the secondary bobbin 11 is inserted in the insertion hole formed in the secondary bobbin 11 so as to be spaced apart from each other by the respective secondary windings ( The primary coil 15 wound on the primary winding unit 13 at the same winding ratio always corresponds to the secondary coil 16 wound at 14). Accordingly, the primary side voltage is uniformly induced on the secondary side and output. Current can be balanced.

In addition, the primary bobbin 10 is inserted into the insertion hole formed in the secondary bobbin 11, a pair of cores 12 are inserted into the insertion hole formed in the primary bobbin 10, and the insertion type multi-output transformer There may be inserted a "U" -shaped core.

The secondary bobbin 11 having the two secondary windings 14 of the insertion type multi-output transformer according to an embodiment of the present invention has three auxiliary terminals (2) opposite to the two output terminals 18a to 18d. 19a to 19c, and the auxiliary terminals 19a to 19c may be located at both ends of the respective secondary windings 14.

At this time, the secondary coil 16 starts winding from the auxiliary terminal 19a of the secondary winding unit 14 and ends winding at any one of the output terminals 18b of the two output terminals 18a to 18b. It can be configured to. In addition, the secondary coil 16 may be configured such that the winding starts from the auxiliary terminal 19b and the winding ends at any one output terminal 18a.

In addition, in the backlight driving circuit including the separate multi-output transformer, the auxiliary terminals 19a to 19c detect a voltage induced in each of the secondary windings 14 of the high voltage output to supply power when an abnormal voltage is detected. A protective function can be implemented.

Through the above configuration, the split type multi-output transformer according to an embodiment of the present invention can drive two lamps or one "U" shaped lamp in one transformer, and the user according to the winding method through one transformer Can produce the desired output.

Example 2

4 is a plan view of an insertion type multi-output transformer in which a primary bobbin is inserted into an insertion hole in a secondary bobbin in which four secondary windings are formed, and FIGS. 5 and 6 are views of the insertion type multi-output transformer. Figure shows an equivalent circuit of.

Referring to FIG. 4, an insertion type multi-output transformer in which a primary bobbin is inserted into an insertion hole in a secondary bobbin having four secondary windings, according to another embodiment of the present invention, includes one primary winding 43 formed therein. Primary bobbin 40, the secondary bobbin 41 formed with two secondary windings 44, the primary coil 45 wound on the primary winding 43, the four secondary windings Secondary coils 46 wound around 44, and cores 42, respectively.

One primary winding part 43 formed on the primary bobbin 40 may include one input terminal 47a and one ground terminal 47b. The primary voltage is applied through the input terminal 47a, and the input terminal 47a and the ground terminal 47b may be located at both ends of the primary winding part 43.

The primary coil 45 is wound around the primary winding portion 43 of the primary bobbin 40, and the primary coil 45 has a winding from the input terminal 47a of the primary winding portion 43. It can be configured to start and end the winding at ground terminal 47b.

Four secondary windings 44 formed on the secondary bobbin 41 may include two output terminals 48a to 48h, respectively. The two output terminals 48a to 48h of each of the secondary windings 44 may be located in the same direction. In addition, the two output terminals 48a and 48b may be located at both ends of the secondary winding 44.

A secondary coil 46 is wound around each secondary winding 44 of the secondary bobbin 41, and the secondary coil 46 is connected to one output terminal 48a of the secondary winding 44. The winding may be started and configured to end the winding at the other output terminal 48b.

Referring to FIGS. 5 and 6, through the above-described configuration, even if eight conventional transformers can be used to drive eight lamps or four "U" shaped lamps through one transformer, Can be. Therefore, the cost is reduced by 1/8 compared with the driving of the conventional transformer, and the size of the product using the transformer can be made smaller than before.

The primary bobbin 40 is inserted in the insertion hole formed in the secondary bobbin 41 so as to be spaced apart from each other, thereby ensuring sufficient insulation separation distance in the relationship of the printed circuit board to be electrically connected to the transformer. It is possible to suppress the generation of the return wire on the high voltage output side which has caused many problems in the past, so that the noise caused by the high voltage output side and the return wire insulation problem and the return wire are not generated, and the waveform of the output current is not distorted.

In addition, the primary bobbin 40 having the same length as that of the secondary bobbin 41 is inserted in the insertion hole formed in the secondary bobbin 41 so as to be spaced apart from each other by a predetermined interval. The primary coil 45 wound on the primary winding part 43 always corresponds to the secondary coil 46 wound at 44, and accordingly, the primary side voltage is uniformly induced on the secondary side and output. Current can be balanced.

In addition, the primary bobbin 40 is inserted into the insertion hole formed in the secondary bobbin 41, and a pair of cores 42 are inserted into the insertion hole formed in the primary bobbin 40. There may be inserted a "U" -shaped core.

According to another embodiment of the present invention, the secondary bobbin 41 having four secondary windings 44 of the insertion type multi-output transformer has five auxiliary terminals (5a) opposite to two output terminals 48a to 48h. 49a to 49e, and the auxiliary terminals 49a to 49e may be located at both ends of the respective secondary windings 44.

In this case, the winding of the secondary coil 46 starts from the auxiliary terminal 49a of the secondary winding unit 44 and the winding ends at one of the output terminals 48b of the two output terminals 48a to 48b. It can be configured to. In addition, the secondary coil 46 may be configured such that the winding starts from the auxiliary terminal 49b and the winding ends at any one of the output terminals 48a.

In addition, in the backlight driving circuit including the separate multi-output transformer, the auxiliary terminals 49a to 49e detect a voltage induced in each of the secondary windings 44 of the high voltage output to supply power when an abnormal voltage is detected. A protective function can be implemented.

Through the above configuration, the split type multi-output transformer according to another embodiment of the present invention can drive four lamps or two "U" shaped lamps in one transformer, and the user according to the winding method through one transformer Can produce the desired output.

The present invention is not limited by the above-described embodiment and the accompanying drawings, but is intended to be limited by the appended claims, and various forms of substitution, modification, and within the scope not departing from the technical spirit of the present invention described in the claims. It will be apparent to those skilled in the art that changes are possible.

1 is a plan view of an insertable multi-output transformer according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating an equivalent circuit of the insertion type multi-output transformer of FIG. 1.

3 is an equivalent circuit diagram of the insertion type multi-output transformer of FIG. 1.

4 is a plan view of an insertable multi-output transformer according to another embodiment of the present invention.

FIG. 5 illustrates an equivalent circuit of the insertion type multi-output transformer of FIG. 4.

FIG. 6 is a diagram illustrating an equivalent circuit of the insertable multi-output transformer of FIG. 4.

<Description of the symbols for the main parts of the drawings>

10: 1st bobbin 11: 2nd bobbin

12: core 13: primary winding

14: secondary winding 15: primary coil

16: secondary coil 17a: input terminal

17b: Ground terminal 18a ~ 18d: Output terminal

19a ~ 19c: auxiliary terminal

Claims (9)

A primary bobbin formed with one primary winding having one input terminal and one ground terminal; A secondary bobbin having n (n: positive) secondary windings each having two output terminals; A primary coil wound around the one primary winding part; A secondary coil wound around the n secondary windings, respectively; A pair of cores; And the primary bobbin is inserted into the insertion hole formed in the secondary bobbin, and the pair of cores are inserted into the insertion hole formed in the primary bobbin. The method of claim 1, And the one input terminal and the one ground terminal are located at both ends of the primary winding. The method of claim 1, The two output terminals of the secondary winding portion are all inserted in the same direction. The method of claim 1, And the two output terminals are inserted at both ends of the secondary winding part. The method of claim 1, The primary coil is an insertion type multi-output transformer in which the winding starts from the input terminal of the primary winding part and the winding ends in the ground terminal. The method of claim 1, The secondary coil is an insertion type multi-output transformer in which the winding starts from one output terminal of the secondary winding part and the winding ends in the other output terminal. A primary bobbin formed with one primary winding having one input terminal and one ground terminal; A secondary bobbin in which n (n: positive) secondary windings each having two output terminals in the same direction are formed; A primary coil wound around the one primary winding part; A secondary coil wound around the n secondary windings, respectively; A pair of cores; The primary bobbin is inserted into the insertion hole formed in the secondary bobbin, a pair of cores are inserted into the insertion hole formed in the primary bobbin, The secondary bobbin has (n + 1) (n: positive) auxiliary terminals in opposite directions to the two output terminals, and the auxiliary terminals are positioned at both ends of each secondary winding part. The method of claim 7, wherein The secondary coil is an insertion type multi-output transformer in which the winding starts from the auxiliary terminal of the secondary winding part and the winding ends in any one of the two output terminals of the secondary winding part. The method according to claim 1 or 7, And the core is an “U” shaped core.

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