KR200381562Y1 - High voltage transformer - Google Patents

Abstract

The high voltage transformer of the present invention includes two electrically insulating brackets each having a longitudinal insertion hole and a transverse opening formed across the insertion hole, the main winding and the subwinding wound around the bracket;

A second iron core with a plurality of extension arms each inserted into an insertion hole of each bracket and a second iron core stopped between the extension arms of the first iron core and inserted through the lateral opening of each bracket Each main winding uses a respective magnetic passage with corresponding subwinding.

Description

High Voltage Transformers {HIGH VOLTAGE TRANSFORMER}

The present invention relates to a transformer, and more particularly, to a high voltage transformer, in which the main winding enables the use of magnetic passages respectively with corresponding subwinding, thereby providing a stable power output for long-term use of the connected lamp tube.

German scientist Karl Ferdinand Brown developed the first controllable CRT in 1897. However, it was in the late 1940s that CRT was first used on television sets. Today, several new display devices have been developed, including TFT LCDs, PDPs, FPDs, and the like, and are entering the market. TFT LCDs are expected to completely replace CRTs in the market.

At present, many CCFLs (Cold Cathod Fluorescent Lamps) are used as the backlight of TFT LCDs. To drive this CCFL, each CCFL uses its own circuit (electronic ballast). Since the CCFL discharges, negative resistance is generated. When multiple CCFLs are connected in parallel to a transformer, the transformer can turn on only one CCFL. Therefore, users include a rectifying capacitor between the CCFL and each transformer so that the CCFLs connected in parallel can be turned on at the same time. However, since each CCFL uses a respective circuit (electronic ballast), the manufacturing cost of the TFT LCD becomes high, and the TFT LCD cannot be small to meet the trend of light, thin, short and small market.

In order to eliminate the above problems, transformer manufacturers have developed transformers of single to multi compact design. According to this design, the main winding and the multiple subwinding are provided on both sides of the magnetic circuit, and the driving circuit is connected to the main winding to provide electrical energy to the main winding so that each subwinding transmits the electrical energy through each capacitor. Output to each lamp. According to this design, one transformer can drive several lamps. The use of such transformers in TFT LCDs reduces the size and manufacturing cost of TFT LCDs. However, this design does not eliminate the magnetic interference between the windings, and the subwinding outputs different amounts of electrical energy to the connected lamp, resulting in insufficient brightness of the lamp or loss of the lamp. To eliminate this problem, different designs of high voltage transformers have been developed. As shown in FIG. 11, the high voltage transformer is configured to form two electrically insulated brackets A connected in parallel, a main winding A1 and a subwinding A2 wound around the electrically insulating bracket A, and a magnetic passage, respectively. It is composed of a U-shaped iron core (B) which is inserted into and in contact with the electrical insulation bracket (A) on both sides. This design's high voltage transformer can drive two lamps simultaneously. The high voltage transformers in this design use multiple primary and secondary windings to drive multiple lamp tubes. However, since the windings use one universal magnetic passage, magnetic interference occurs between each two adjacent windings, resulting in irregular brightness and unstable power output of the connected lamp tube. Moreover, the use of one common magnetic path of multiple primary and subwindings causes magnetic saturation, resulting in loss of magnetization and overheating of the iron core set, and the amount of power of the high voltage transformer is reduced.

Moreover, the arrangement of a plurality of main windings and sub windings significantly increases the length of the magnetic passage, thereby lowering the occurrence of leakage inductance. However, with the advent of full wavelength or half wavelength bridge types, high voltage transformers must use leakage inductance to achieve the desired resonant frequency. In order to obtain the desired resonance, the leakage inductance must reach a predetermined value.

Therefore, it is desirable to provide a high voltage transformer that can overcome the above problems.

The present invention is achieved in the environment described below. The main purpose of the high voltage transformer of the present invention is to use the iron core to separate the windings and prevent the interference between two adjacent windings, allowing the main windings to use each magnetic path with the corresponding sub-winding, so that the stable power Provides output and prevents magnetic saturation, loss of overheating or magnetization of the iron core set.

Another object of the present invention is to provide a high voltage transformer having a set of iron cores arranged to shorten magnetic passages, increase leakage inductance, and provide a desired resonance frequency.

In order to achieve the object of the present invention, the high voltage transformer of the present invention comprises an electrically insulating base consisting of at least one insulating bracket having an insertion hole extending from two spaced ends; A plurality of main windings and a plurality of subwindings respectively wound around the at least one electrically insulating bracket; An iron core set consisting of at least one first iron core having a plurality of extension arms respectively inserted into respective insertion holes of the electrically insulating bracket, and at least one second iron core attached to the at least one first iron core. Consists of; Each of the electrically insulating brackets has an opening extending across each insertion hole between two windings in each electrically insulating bracket to receive the second iron core, such that the second iron core is formed in each of said first core. It can be stopped with respect to the extension arm of one iron core.

1 and 2, the high voltage transformer according to the first embodiment of the present invention is composed of a base 1 and an iron core set 2.

The base 1 is made of an electrical insulating material, and wound around a plurality of main windings 111 and the other brackets 11 respectively wound around one of two parallel brackets 11 and two brackets 11. It consists of a subwinding 112. Each bracket 11 has an insertion hole 12 extending in the longitudinal direction, an opening 13 formed in the transverse direction of the insertion hole 12 and two adjacent windings 111 or 112 separated. According to this embodiment, there are two main windings 111 and two subwindings 112, each bracket 11 having one transversely extending opening 13 of each insertion hole 12. Each winding 111 or 112 is separated. Furthermore, the plurality of lead wires 14 are provided in the brackets 11, respectively, and are electrically connected to the ends of the windings 111 and 112, respectively.

The iron core set 2 includes two first iron cores 21 and a second iron core 22. Each first iron core 21 has two extension arms 211 arranged in parallel.

During the assembly process of the first embodiment of the present invention, the extension arms 211 of the two first iron cores 21 are respectively inserted into respective insertion holes 12 of the two brackets 11 from both sides, and the second The iron core 22 is inserted into the opening 13 and stopped between the extension arms 211 of the two first iron cores 21.

In use, current flows from the bracket 11 holding the main winding 111 through the lead wire 14 to the main winding 111 and into the first iron core 21 and the second iron core 22. The voltage of the current is changed so as to be output through the secondary winding 112 through the lead wire 14 in the bracket 11 holding the second winding 112 by the magnetic passage formed therein. do. By means of the arrangement of the second iron cores 22, each main winding 111 uses a respective magnetic passage (see the arrow in FIG. 2) with the corresponding second winding 112, or the main winding 111, or Interference between the subwinding 112 is prevented and a stable current output is obtained from the subwinding 112. Moreover, because each main winding 111 uses its own magnetic passage with the corresponding sub-winding 112, the present invention is based on the use of one common magnetic passage for multiple primary and windings 111, 112. Magnetic saturation is prevented, and overheating and loss of magnetization of the iron core set 2 are prevented, thereby increasing the amount of power of the high voltage transformer.

Moreover, the design of the second iron core 22 shortens the magnetic path, thereby increasing the magnetization rate of the iron core set 2 and increasing the leakage inductance of the entire assembly, thereby reducing the resonance frequency for the high voltage transformer. Meet the requirements.

Furthermore, the first iron core 21 and the second iron core 22 of the iron core set 2 may be made of silicon steel plates.

3 and 4 illustrate a high voltage transformer according to a second embodiment of the present invention. According to this embodiment, the high voltage transformer is composed of a base 1 and an iron core set 2. The base 1 is composed of four brackets 11 arranged in parallel. The bracket 11 according to the second embodiment has the same structure as described in the first embodiment described above. The first iron cores 21 of the iron core set 2 each have a plurality of extension arms 211 arranged in parallel, and are respectively inserted into the insertion holes 12 of the bracket 11 from both sides. The second iron core 22 is inserted into the opening 13 of the bracket 11 and stopped between the extension arms 211 of the two first iron cores 21. This embodiment has a plurality of subwindings 112 to provide an output current.

5 and 6 illustrate a high voltage transformer according to a third embodiment of the present invention. According to this embodiment, the high voltage transformer is composed of a base 1 and an iron core set 2. The base 1 is composed of three brackets 11 arranged in parallel. Each of the two side brackets 11 is mounted with two subwindings 112 on both sides of each opening 13. The intermediate bracket 11 is mounted with two subwindings 111 on both sides of each opening 13. The iron core set 2 consists of an E-type first iron core 23 which is respectively inserted into the insertion holes 12 of the three brackets 11 of the base 1 from both sides, and one second iron core ( 22 is inserted into the opening 13 of the bracket 11 and is stopped between the two E-shaped first iron cores 23. This embodiment has the same advantages as the first embodiment of the present invention.

7 and 8 illustrate a high voltage transformer according to a fourth embodiment of the present invention. According to the present embodiment, the high voltage transformer has a bracket 11 having a longitudinal insertion hole 12 and an opening 13 extending laterally across the longitudinal insertion hole 12 and with respect to the opening 13. The main winding 111 wound around the bracket 11 at one side, and the sub winding 112 wound around the bracket 11 at the other side with respect to the opening 13, and the main winding 111 and the sub winding 112. It is composed of a plurality of lead wires (14), and iron core set (2), each of which is electrically connected to the bracket 11 and installed on the bracket (11). The iron core set 2 is in contact with the first iron core 21 inserted into the insertion hole 12 of the bracket 11 and the first iron core 21 and attached to the side of the bracket 11. It consists of two iron cores 22. The second iron core 22 stops with respect to the side surfaces of the two end butts 221 and the first iron core 21 respectively stopped at the ends of the first iron core 21 and into the opening 13. It consists of an interlocking intermediate butt 222.

During use of the fourth embodiment, a current is connected to the main winding 111 through the lead wire 14 at one end of the bracket 11 to form the first iron core 21 and the second iron core 22. Induced together with the subwinding 112 by the magnetic path, the voltage of the current is output through the second winding 112 through the lead wire 14 at the other end of the bracket 11. The first iron core 21 forms two magnetic passages together with the second iron core 22 to prevent the interference between the main winding 111 and the sub winding 112. Therefore, this arrangement increases the leakage inductance of the entire assembly and the magnetic transmission of the iron core set 2 to meet the resonant frequency requirements for the high voltage transformer.

9 and 10 illustrate a high voltage transformer according to a fifth embodiment of the present invention. This embodiment is quite similar to the fourth embodiment except for the iron core set 2 design. According to the present embodiment, the iron core set 2 is composed of two E-type first iron cores 23 and second iron cores 22. The two E-type first iron cores 23 are inserted through the openings 13 in the brackets 11 between the main windings 111 and the second windings 112, and the E-type first iron cores 23. Stopped in between. This embodiment has the same advantages as the above-described embodiments.

As described above, the present invention overcomes the drawbacks of the prior art with the following features:

1. The second iron core stops between the first iron cores (or stops with respect to the first iron core), and is set between the main winding and the subwinding (or between the main winding and the second winding) and each main winding. Each magnetic passage in combination with this one subwinding prevents overheating and loss of magnetization of the iron core set and interference between windings, thereby increasing the power capacity of the high voltage transformer.

2. The present invention uses a second iron core to shorten the magnetic path and increase the magnetic transmission of the iron core set, thereby increasing the leakage inductance of the entire assembly, thereby meeting the requirements of the resonant frequency for the high voltage transformer. .

Typical of high voltage transformers are made with the features of FIGS. High voltage transformers naturally function to provide all of the above features.

Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and changes may be made without departing from the scope and spirit of the invention. Therefore, the present invention is not limited by the description except the scope of the utility model registration request attached.

1 is an exploded perspective view of a high voltage transformer according to a first embodiment of the present invention

2 is an assembled perspective view of a high voltage transformer according to a first embodiment of the present invention

3 is an exploded perspective view of a high voltage transformer according to a second embodiment of the present invention;

4 is an assembled perspective view of a high voltage transformer according to a second embodiment of the present invention;

5 is an exploded perspective view of a high voltage transformer according to a third embodiment of the present invention

6 is an assembled perspective view of a high voltage transformer according to a third embodiment of the present invention

7 is an exploded perspective view of a high voltage transformer according to a fourth embodiment of the present invention

8 is an assembled perspective view of a high voltage transformer according to a fourth embodiment of the present invention

9 is an exploded perspective view of a high voltage transformer according to a fifth embodiment of the present invention;

10 is an assembled perspective view of a high voltage transformer according to a fifth embodiment of the present invention

11 is an exploded perspective view of a conventional high voltage transformer

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

1 Base 2 Iron Core Set

11 bracket 12 insertion hole

13: opening 14: lead wire

21: first iron core 22: second iron core

111: main winding 112: sub-winding

211: extension arm 221: end butt

222: medium butt

Claims (6)

An electrically insulating base consisting of at least one insulating bracket having an insertion hole extending from two spaced ends, A plurality of main windings and a plurality of subwindings respectively wound around the at least one or more electrically insulating brackets; An iron core set consisting of at least one first iron core having a plurality of extension arms respectively inserted into respective insertion holes of the electrically insulating bracket, and at least one second iron core attached to the at least one first iron core. Consist of, Each of the electrically insulating brackets has an opening extending across each insertion hole between two windings in each electrically insulating bracket to receive the second iron core, such that the second iron core is formed in each of said first core. 1 High voltage transformer, characterized in that can be stopped with respect to the extension arm of the iron core. The method of claim 1, And a plurality of lead wires electrically connected to the main windings and the sub windings, respectively, and extending from two spaced ends of the respective brackets. The method of claim 1, Wherein said at least one first iron core and the second iron core are each made of a silicon steel plate. The method of claim 1, The base is a high voltage transformer, characterized in that consisting of a plurality of electrically insulating brackets arranged in parallel. An electrically insulating bracket having an insertion hole extending from two spaced ends, A main winding and at least one sub-winding wound around the electrically insulating bracket, respectively; A first iron core inserted into the insertion hole of the electrically insulating bracket, and two attached to the electrically insulating bracket and respectively stopped at two spaced ends of the first iron core outside the insertion hole of the electrically insulating bracket. Consisting of a set of iron cores composed of a second iron core having an end butt, The electrically insulating bracket has an opening extending laterally across the insertion hole between the main winding and the at least one subwinding, wherein the second iron core is stationary relative to one side of the first iron core and the A high voltage transformer, characterized in that it has an intermediate butt that engages in the opening of the electrically insulating bracket. An electrically insulating bracket having an insertion hole extending from two spaced ends, A main winding and at least one sub-winding wound around the electrically insulating bracket, respectively; It consists of two E-type first iron cores respectively inserted into insertion holes of the electrically insulating bracket from both sides, The electrically insulating bracket has an opening extending laterally across the insertion hole between the main winding and the at least one subwinding, the second iron core is stopped between the two E-type first iron cores and the And a high voltage transformer inserted through said opening of said electrically insulating bracket.