KR101015652B1 - Spilt-Type Multi-Output Transformer - Google Patents

Abstract

A separate multi-output transformer according to the present invention includes: 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 respectively inserted into insertion holes formed in the primary bobbin and the secondary bobbin so that the primary bobbin and the secondary bobbin are separated.

Transformer, Primary Bobbin, Secondary Bobbin, Core, Winding Section

Description

Split-Type Multi-Output Transformer

The present invention relates to a transformer, and more particularly, to a multi-output transformer in which primary bobbins forming a primary side and secondary bobbins forming a secondary side are separated.

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 supply power to 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.

The present invention separates the primary bobbin forming one primary side and the secondary bobbin forming n (n: positive) secondary sides to efficiently extract multiple outputs from one transformer according to electrical characteristics. It is an object to provide a multi-output transformer.

A separate multi-output transformer according to the present invention includes: 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 respectively inserted into insertion holes formed in the primary bobbin and the secondary bobbin so that the primary bobbin and the secondary bobbin are separated.

In the present invention, the secondary bobbin has the same size as the primary bobbin and may be positioned to correspond to each other with the primary bobbin.

In the present invention, both the input terminal and the ground terminal of the primary winding may be located in the same direction.

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

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, 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.

A separate multi-output transformer according to the present invention includes: 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 respectively inserted into insertion holes formed in the primary bobbin and the secondary bobbin such that the primary bobbin and the secondary bobbin are separated from each other, wherein the secondary bobbin is opposite to the two output terminals. Has (n + 1) (n: positive) auxiliary 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 split type multi-output transformer according to the present invention made as described above has a problem of balancing the output current by separating the primary bobbin forming one primary side and the secondary bobbin forming n (n: positive) secondary sides. It can solve the problem of insulation of high voltage and 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 a split type multi-output transformer having a secondary bobbin formed with two secondary windings separated from the primary bobbin according to an embodiment of the present invention, and FIGS. 2 and 3 are equivalent to the split type multi-output transformer. A diagram showing a circuit.

Referring to FIG. 1, a split type multi-output transformer having a secondary bobbin having two secondary windings separated from the primary bobbin according to an embodiment of the present invention, the primary winding having one primary winding 13 formed therein is shown. 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 ( 14 may include a secondary coil 16 wound around the core 12 and a core 12 inserted into an insertion hole formed in the primary bobbin 10 and the secondary bobbin 11.

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 both the input terminal 17a and the ground terminal 17b may be located in the same direction. In addition, the input terminal 17a and the ground terminal 17b may be located at both ends of the primary winding part 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.

The two secondary windings 14 formed on the secondary bobbin 11 separated from the primary bobbin 10 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 secondary bobbin 11 is separated from the primary bobbin 10 so as to be spaced apart from each other, so that a sufficient insulation separation distance can be secured 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 secondary bobbin 11 may have the same size as the primary bobbin 10 and may be positioned to correspond to the primary bobbin 10. Accordingly, the secondary coils 16 wound on the respective secondary windings 14 correspond to the primary coils 15 wound on the primary windings 13 at the same winding ratio at all times, and thus the primary side voltages. This is uniformly induced on the secondary side to balance the output current.

In addition, a pair of cores 12 are inserted into insertion holes formed in the primary bobbin 10 and the secondary bobbin 11 so that the primary bobbin 10 and the secondary bobbin 11 are separated from each other. The "U" shaped core can be inserted into the multi-output transformer.

The secondary bobbin 11 having the two secondary windings 14 of the split 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 a separate multi-output transformer having a secondary bobbin formed with four secondary windings separated from the primary bobbin according to another embodiment of the present invention, and FIGS. 5 and 6 are equivalent to the separate multi-output transformer. A diagram showing a circuit.

Referring to FIG. 4, the split type multi-output transformer having secondary bobbins having four secondary windings separated from the primary bobbin according to another embodiment of the present invention has a primary formed with one primary winding 43. Bobbin 40, the secondary bobbin 41 formed with four secondary windings 44, the primary coil 45 wound on the primary winding 43, the four secondary windings ( A secondary coil 46 wound around each of 44, and a core 42 inserted into an insertion hole formed in the primary bobbin 40 and the secondary bobbin 41 may be included.

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 both the input terminal 47a and the ground terminal 47b may be positioned in the same direction. In addition, 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 separated from the primary bobbin 40 may each include two output terminals 48a to 48h. 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 secondary bobbin 41 is separated from the primary bobbin 40 so as to be spaced apart from each other, so that a sufficient insulation separation distance can be secured in a relationship between 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 secondary bobbin 41 may have the same size as the primary bobbin 40 and may be positioned to correspond to the primary bobbin 40. Therefore, the secondary coils 46 wound on the respective secondary windings 44 always correspond to the primary coils 45 wound on the primary windings 43 at the same winding ratio, and thus the primary side voltages. This is uniformly induced on the secondary side to balance the output current.

In addition, a pair of cores 42 are inserted into insertion holes formed in the primary bobbin 40 and the secondary bobbin 41 so that the primary bobbin 40 and the secondary bobbin 41 are separated from each other. The "U" shaped core can be inserted into the multi-output transformer.

According to another embodiment of the present invention, the secondary bobbin 41 having four secondary windings 44 of the split 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 a separate multi-output transformer according to an embodiment of the present invention.

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

FIG. 3 is a diagram illustrating an equivalent circuit of the separate multi-output transformer of FIG. 1.

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

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

FIG. 6 is a diagram illustrating an equivalent circuit of the separate 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 (11)

A primary bobbin formed with one primary winding having one input terminal and one ground terminal; A secondary bobbin which is formed to be spaced apart from each other in parallel with the primary bobbin and has 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 first core and a primary bobbin inserted into insertion holes formed in the primary bobbin and the secondary bobbin on one side of the primary bobbin and the secondary bobbin, respectively, on the other side of the primary bobbin and the secondary bobbin; And a pair of cores formed of second cores respectively inserted into insertion holes formed in the secondary bobbin. The method of claim 1, The secondary bobbin has the same size as the primary bobbin and is positioned to correspond to each other with the primary bobbin. The method of claim 1, A separate multi-output transformer in which both the input terminal and the ground terminal of the primary winding are located in the same direction. The method of claim 1, Two output terminals of the secondary winding portion are separated multi-output transformers are all located in the same direction. 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, And the two output terminals are located at both ends of the secondary winding part. The method of claim 1, The primary coil is a separate 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 a separate 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 which is formed to be spaced apart from each other in parallel with the primary bobbin and has n (n: positive) secondary windings each having two output terminals in the same direction; A primary coil wound around the one primary winding part; A secondary coil wound around the n secondary windings, respectively; A first core and a primary bobbin inserted into insertion holes formed in the primary bobbin and the secondary bobbin on one side of the primary bobbin and the secondary bobbin, respectively, on the other side of the primary bobbin and the secondary bobbin; And a pair of cores formed of second cores respectively inserted into insertion holes formed in the secondary bobbin. The secondary bobbin, And (n + 1) (n: positive) auxiliary terminals in opposite directions to the two output terminals, wherein the auxiliary terminals are positioned at both ends of each secondary winding part. The method of claim 9, The secondary coil is a separate 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 9, And the first core and the second core are "U" shaped cores.

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