KR100729554B1 - Transformer module for inverter - Google Patents

Abstract

A transformer module for an inverter is provided to reduce the thickness of the transformer by winding a coil around an I type nickel core without using a winding bobbin and then bonding more than two I type nickel cores with different winding ratios. In a transformer module for an inverter boosting a low voltage to a high voltage and outputting the high voltage, a primary coil part has an I type nickel core(100A) wound by a copper wire(102) and ends of the wound copper wire are connected to more than two ports(101a,101b) and a current is inputted through the port. A secondary coil part has an I type nickel core(100B) wound by a copper wire(103), and ends of the wound copper wire are connected to more than two ports(104a,104b) and an induction current is outputted through the port. A core fixing unit forms a magnetic closed loop due to the current flowing through the primary coil part as the I type nickel cores of the primary coil part and the secondary coil part are contacted with each other.

Description

Transformer module {Inverter module for Inverter}

1 is an exploded perspective view showing a transformer for an inverter according to the prior art

2 is an illustration of an inverter transformer according to the present invention

3 is a cross-sectional view of FIG.

4 is an exemplary cross-sectional view of a completed inverter transformer according to the present invention.

5 and 6 is a cross-sectional view of another embodiment of a completed inverter transformer according to the present invention

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

100A, 100B: I-shaped nickel core

102, 103: copper wire

101a, 101b, 104a, 104b: terminal

200: tape

210: mold

The present invention relates to a transformer for inverters. In particular, after winding a coil on an I-shaped nickel core without using a winding bobbin, the transformer maintains the function of the transformer by contacting two or more I-shaped nickel cores having different turns ratios. A transformer for inverters can be reduced.

BACKGROUND In general, a backlight inverter of a TFT-LCD used in a computer monitor generates a high AC voltage to drive a cold cathode fluorescent lamp (hereinafter referred to as CCFL) by receiving a DC input voltage. The high voltage applied to the CCFL by this high voltage determines the amount of white light output, thereby determining the brightness of the RGB image on the LCD surface through the TFT-LCD light guide plate.

In such an inverter, a transformer (TRANSFORMER) for converting a low voltage into a high voltage is insulated from a ferrite core 3 which serves to guide magnetic flux as shown in FIG. 1, and a coil wound around the core. A bobbin 10 made of a synthetic resin material is mounted on a printed circuit board (PCB) 2.

The bobbin 10 has a low pressure coil winding 11 and a high pressure coil winding 12 formed thereon and connected to the PCB 2 at the tip of each coil winding to form an electrical connection path to form a terminal of the primary coil winding. Pins 15 and terminal pins 15 of the secondary coil winding are formed.

At this time, the size of LCD panels is getting bigger due to technological improvement and consumer demand. Therefore, large LCD panels tend to use a plurality of CCFLs because only one CCFL used as a single backlight light source cannot provide sufficient light sources.

In addition, the desire of consumers is constantly demanding to reduce the volume and thickness without stopping on the size of the screen provided, in order to increase the size of the screen, the number of lamps used in the backlight module in the liquid crystal display and the number of corresponding transformers In this case, the volume of the liquid crystal display is enlarged and the corresponding weight is also increased.

Therefore, the manufacturer's point of view is the need to properly tune production costs and consumer needs. When using a single transformer to drive multiple lamps, the voltage of the transformer must be increased to provide high power output.

When a single transformer is used to drive a plurality of lamps as described above, both the primary and secondary coils are wound in the same winding rack to limit the winding area of the primary coil.

Therefore, if the voltage output is increased in accordance with the requirements of the transformer, the number of windings in the primary coil region and the secondary coil region should be increased, and also the problem that the total volume of the liquid crystal display increases as the thickness of the transformer is increased. do.

On the other hand, when a plurality of transformers are used to drive a plurality of lamps, the thickness of the transformer is reduced, but the production cost is increased compared to the case of using a single transformer.

An object of the present invention for solving the above problems is to maintain the function of the transformer by contacting two or more I-shaped nickel cores with different turns ratio after winding the coil on the I-shaped nickel core without using a winding bobbin. To provide a transformer for the inverter that can reduce the amount.

A feature of the inverter transformer according to the present invention for achieving the above object, in the inverter transformer for boosting and outputting a low voltage input to a high voltage, the copper wire is wound around the I-shaped nickel core at a constant turns ratio, End portions of the copper wire are connected to two different terminals, respectively, and a primary coil part into which current is input through the terminals; A secondary coil unit in which copper wire is wound around the I-shaped nickel core at a predetermined turns ratio, and ends of the wound copper wire are connected to two different terminals, respectively, and an induced current is output through the terminal; And a core fixing means for forming an I-shaped nickel core of the primary coil part and the secondary coil part to be in contact with each other to form a magnetic closed loop by a current flowing through the primary coil part.

In another aspect of the inverter transformer according to the present invention for achieving the above object, when the I-shaped nickel core that the copper wire is wound and the secondary coil portion of the secondary coil portion abuts in series through the primary coil portion The method further includes a rod-shaped nickel core for forming a magnetic closed loop in contact with the side surfaces of the I-shaped nickel core in contact with the primary coil and the secondary coil in contact with each other to form a magnetic closed loop by a flowing current.

In another aspect of the inverter transformer according to the present invention for achieving the above object, the core fixing means is to tape around the nickel core abutted with a tape.

Another feature of the inverter transformer according to the present invention for achieving the above object, filled in the inner space formed by the tape taped around the contacting nickel core to prevent the separation of the contacting nickel core and at the same time to each nickel core It further comprises a mold for performing an electrical shielding function between the winding copper wire.

The above object and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

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

2 is an exemplary diagram of an inverter transformer according to the present invention, and FIG. 3 is an exemplary cross-sectional view of FIG. 2.

Inverter transformer according to the present invention is divided into primary and secondary coils, the primary coil is a copper wire 102 is wound around the I-shaped nickel core (100A) at a constant turns ratio, the end of the winding copper wire 102 It is connected to terminals 101a and 101b, respectively, and a current is input through the terminals 101a and 101b.

The secondary coil corresponding to the primary coil has a copper wire 103 wound around the I-shaped nickel core 100B at a constant turns ratio, and ends of the wound copper wire 103 are connected to terminals 104a and 104b, respectively. The induced current is output through the terminals 104a and 104b.

At this time, the I-shaped nickel cores 100A and 100B of the primary side and the secondary side coils come into contact with one another as shown in FIG. 3, and thus, a closed loop magnetic field represented by a dashed line in FIG. 3. A magnetic field is formed through the coil 103 wound on the I-shaped nickel core 100B according to the variation of the magnetic field corresponding to the variation of the current flowing through the coil 102 wound on the I-shaped nickel core 100A by forming a path. The variation of the induced current is outputted to perform the function of a transformer.

4 is an exemplary cross-sectional view of the completed inverter transformer according to the present invention, in which two I-shaped nickel cores 100A and 100B contacted each other fall or are formed in a closed loop magnetic field. To prevent the path from changing, taping with a fixing tape referred to by reference numeral 200, and filling a mold (e.g. silicone) referred to by reference numeral 210 into the inner space taped with the fixing tape 200. .

The mold 210 prevents separation between the two I-shaped nickel cores 100A and 100B which are in contact with each other, and simultaneously performs electrical shielding between the primary and secondary copper wires 102 and 103.

The coupling structure illustrated in FIGS. 2 to 4 is an example for explaining the structure and technical idea of the present invention in the simplest manner, and the actual implementation may vary in many ways. 5 to 6 as shown.

5 and 6 are the same as the operation of the above-described embodiment, and thus will be omitted below. Briefly, only the differences in the configuration will be described. It is a case to implement the planar transformer of the multi-input multi-output.

6 is a case where the I-shaped nickel cores 100A and 100B in which the copper coils 102 and 103 are wound and the I-shaped nickel cores 100A and 100B are wound in series. Bar-shaped nickel for forming magnetic closed loops in contact with the sides of the I-shaped nickel cores 100A and 100B which are in contact with each other to form a magnetic closed loop by the current flowing through the primary coil. The configuration further includes a core (not given a reference number).

While the invention has been shown and described in connection with specific embodiments thereof, it is conventional in the art that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the utility model registration claims. Anyone with knowledge will know it easily.

Providing the transformer for the inverter according to the present invention as described above can reduce the production cost due to not using the bobbin and there is an effect that can be used to make a transformer having a large area as needed.

Claims (4)

In the inverter transformer for boosting the low voltage input to a high voltage and outputting, A copper coil wound around the I-shaped nickel core at a predetermined turns ratio, the ends of the wound copper wire being connected to two or more different terminals, respectively, wherein a primary coil part for inputting current through the terminal; A secondary coil unit in which copper wire is wound around the I-shaped nickel core at a predetermined turns ratio, and ends of the wound copper wire are connected to two or more different terminals, respectively, and an induced current is output through the terminal; And And a core fixing means for causing the I-shaped nickel cores of the primary coil portion and the secondary coil portion to contact each other to form a magnetic closed loop by a current flowing through the primary coil portion. The method of claim 1, When the I-shaped nickel core in which the copper wire is wound and the I-shaped nickel core of the secondary coil part contact in series, the primary coil part and the secondary side which are in contact with each other to form a magnetic closed loop by current flowing through the primary coil part The inverter transformer further comprises a rod-shaped nickel core for forming a magnetic closed loop in contact with the side of the I-shaped nickel core of the coil portion. The method according to claim 1 or 2, The core fixing means is taped around the nickel core abuts with tape. The method of claim 3, wherein It characterized in that it further comprises a mold for filling the internal space formed by the tape taped around the contacting nickel core to prevent the contact of the contacting nickel core and at the same time to perform electrical shielding function between the copper wire wound around each nickel core. Inverter transformer.

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