CN2802675Y - Converter transformer structure with step-up shunt loading balance - Google Patents
Converter transformer structure with step-up shunt loading balance Download PDFInfo
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- CN2802675Y CN2802675Y CN 200520108883 CN200520108883U CN2802675Y CN 2802675 Y CN2802675 Y CN 2802675Y CN 200520108883 CN200520108883 CN 200520108883 CN 200520108883 U CN200520108883 U CN 200520108883U CN 2802675 Y CN2802675 Y CN 2802675Y
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- drum stand
- shunt
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Abstract
The utility model relates to a converter transformer structure with step-up shunting load balance, which is used for driving cold-cathode tubes. The utility model is mainly composed of a bobbin bracket and an iron core group, wherein a primary side winding and a secondary side winding region are wound on the bobbin bracket; the secondary side winding region is composed of a secondary side sharing winding and a secondary side shunt winding. The interior of the bobbin bracket has a hollow penetrating part; the iron core group composed of magnetic conducting components is respectively inserted from both ends of the hollow penetrating part; the iron core group forms a magnetic conducting path at the circumference of the bobbin bracket, and forms a converter transformer with step-up shunting load balance with the windings wound on the bobbin bracket in virtue of electromagnetic effect.
Description
Technical field
The utility model relates to a kind of tool shunt loading balance converter transformer structure of boosting, and particularly a kind of induced voltage and balanced load electric current stablized improves the stability and the reliability of its luminous efficiency thus, and then more uniform back light is provided.
Background technology
General LCD panel is with cold-cathode tube (Cold Cathode Fluorescent Lamp, CCFL) as the backlight (back light) of this panel, generally speaking, all with converter (inverter) drives cold-cathode tube meeting the demand of high voltage output, and it all adopts high frequency transformer to drive usually.
See also the schematic diagram of known high frequency transformer shown in Figure 1, as shown in Figure 1, known high frequency transformer mainly is made of drum stand (bobbin) 1a, first 1b unshakable in one's determination and second 1c unshakable in one's determination, forms first side winding district 1d and secondary side winding district 1e on drum stand 1a respectively.
As shown in Figure 1, prominent several separation troughs 1h that establishes of the lateral margin of this drum stand 1a, be arranged with secondary side winding 1g in this separation trough 1h to constitute secondary side winding district 1e, and be arranged with first side winding 1f to constitute first side winding district 1d, though above-mentioned known high frequency transformer can connect power supply and load, still at drum stand 1a, because the increase day by day of LCD panel size, cause the length and the quantity of cold-cathode tube also must increase relatively, yet, also make the required driving voltage of transformer increase thereupon.Therefore, by the voltage divider principle at the interval of separation trough 1h, install the number of separation trough 1h relatively according to the height of working voltage, to improve the reliability of product.
See also the application of driver circuits schematic diagram of known high frequency transformer shown in Figure 2, as shown in Figure 2, according to desirable load user mode, it utilizes cold- cathode tube 2a and 2b to belong to the characteristic load of negative temperature equiva lent impedance, add that again its temperature rises after the conducting, impedance reduces, make it based on cost consideration, often with corresponding cold-cathode tube 2a in parallel of a secondary side winding 1g and 2b.Just, cold-cathode tube 2a is neither identical with 2b impedance each other, thereby is easy to cold-cathode tube 2a and its pipe end of 2b causes shunt effect (that is I
1, I
2), cause cold- cathode tube 2a and 2b current unevenness, cause the excessive situation of luminance difference that produces;
See also the application of driver circuits schematic diagram of the known high frequency transformer shown in Fig. 3 A～Fig. 3 C, shown in Fig. 3 A, Fig. 3 B, general industry is the situation that overcomes above-mentioned cold- cathode tube 2a and 2b current unevenness, and to mate balance coil 3 by setting up, make cold- cathode tube 2a and 2b reach electric current and interact to use and obtain the better balance electric current, and make its brightness obtain effective improvement; Yet, under cost consideration, set up a coupling balance coil 3 and not only improve its cost relatively, also cause its space utilization of circuit board restricted simultaneously.
In addition, shown in Fig. 3 C,, also can reach the purpose that reduces shunt effect if will use high-voltage capacitance C1, C2 among Fig. 2 to replace originally with inductive component L1, L2.
In the denominator of known converter transformer, when being used for promoting many fluorescent tubes, it uses the magnitude of current to increase by multiple along with the fluorescent tube number.Thus, the employed line of secondary side winding 1g footpath can become big, and then makes the winding region insufficient space, has to increase winding region, yet, adopting bigger converter transformer, its cost also increases simultaneously thereupon.
Summary of the invention
The purpose of this utility model provides a kind of tool shunt loading balance converter transformer structure of boosting.
Above-mentioned purpose of the present utility model is achieved in that a kind of tool shunt loading balance converter transformer structure of boosting, and comprising:
Group unshakable in one's determination has two or more magnetic conduction subassemblies, and the stretch through hollow of drum stand of one or above magnetic conduction subassembly runs through portion, constitutes closed magnetic path footpath with all the other magnetic conduction subassemblies or has the closed magnetic path footpath of air gap;
Drum stand has a hollow and runs through portion, organizes the combination that stretches through for unshakable in one's determination, and is distinguished into the first side winding and the secondary side winding district of twining for coil in lateral margin; It is characterized in that:
The secondary side winding district is provided with secondary side and shares winding and secondary side shunt winding, two or more secondary sides along separate routes windings secondary side along separate routes winding be single groove layer around, and all each end of secondary side shunt winding coil is connected to the end that secondary side is shared winding via outside or lead terminal, and each adjacent secondary side shunt loading current and phase difference is less than 90 degree.
Above-mentioned purpose of the present utility model can also realize like this, and a kind of tool shunt loading balance converter transformer structure of boosting comprises:
Group unshakable in one's determination has two or more magnetic conduction subassemblies, and the stretch through hollow of drum stand of one or above magnetic conduction subassembly runs through portion, and magnetic conduction subassembly outside with it constitutes closed magnetic path footpath;
First drum stand is provided with a hollow and runs through portion, and its lateral margin is distinguished into for the secondary side in the first side winding of coil winding and secondary side winding district shares winding;
Second drum stand is provided with a hollow and runs through portion, it is characterized in that:
Second drum stand and first drum stand stretch through at the same time or separately for group unshakable in one's determination and are combined into an entity, this second drum stand lateral margin district is arranged with single groove floor around secondary side shunt winding, two or more secondary sides along separate routes windings secondary side along separate routes each end of winding be connected to the first side winding of twining first drum stand and the secondary side in secondary side winding district via outside or lead terminal and share the end that secondary side in the drum stand of winding is shared winding, each adjacent secondary side shunt loading current and phase difference is spent less than 90.
Above-mentioned purpose of the present utility model also can realize like this, and a kind of tool shunt loading balance converter transformer structure of boosting comprises:
Group unshakable in one's determination has two or more magnetic conduction subassemblies, and the stretch through hollow of drum stand of one or above magnetic conduction subassembly runs through portion, and magnetic conduction subassembly outside with it constitutes closed magnetic path footpath;
Drum stand has a hollow and runs through portion, organizes the combination that stretches through for unshakable in one's determination, and is distinguished into the first side winding and the secondary side winding district of twining for coil in lateral margin; It is characterized in that:
The trivial secondary side that is divided into of secondary side winding is shared winding and two secondary side shunt windings, each secondary side along separate routes winding with two or more multiple-grooveds branches around, and two adjacent grooves are arranged is the load wiring end, and two secondary sides along separate routes each end of winding coil be connected to the end that secondary side is shared winding via outside or lead terminal.
Technique effect of the present utility model is, utilize the secondary side winding district to be set around secondary side and share winding and secondary side shunt winding, simultaneously via first core part and second core part, make the first side winding of its this drum stand advance and to be coupled with the secondary side winding district, can stablize the output of converter transformer two ends induced voltage, its secondary side of this external cause is winding and equal induced fields simultaneously on same magnetic circuit along separate routes, thereby has a boost function, and again according to winding number and winding construction, the characteristic of utilizing it to interact, also can drive the cold-cathode tube more than two or two simultaneously, and then reach the purpose of the load current of each cold-cathode tube of balance, with stability and the reliability that improves its lamp efficiency, and obtain more uniform back light.
Description of drawings
Fig. 1 is the schematic diagram of known high frequency transformer;
Fig. 2 is the application of driver circuits schematic diagram of known high frequency transformer;
Fig. 3 A～Fig. 3 C is the application of driver circuits schematic diagram of known high frequency transformer;
Fig. 4 A～Fig. 4 B is the boost schematic diagram of shunt loading balance converter transformer structure of the utility model tool;
Fig. 5 is the boost circuit diagram of shunt loading balance converter transformer structure of the utility model tool;
Fig. 6 is the boost structural representation of shunt loading balance converter transformer structure of the utility model tool;
Fig. 7 is the boost wiring schematic diagram of shunt loading balance converter transformer structure of the utility model tool;
Fig. 8 is boost another wiring schematic diagram of shunt loading balance converter transformer structure of the utility model tool.
Description of reference numerals: 1a, 5,51,52-drum stand; 1b, 16a-first iron core; 1c, 16b-second iron core; 1d-first side winding district; 1e-secondary side winding district; The 1f-first side winding; The 1g-secondary side winding; 1h, 17-separation trough; 2a, 2b-cold-cathode tube; 3-mates balance coil; The 7-lead terminal; The 10-converter transformer; The 12-first side winding; 14-secondary side winding district; The 14a-secondary side is shared winding; 14b, 14c, 14d, 14e-secondary side be winding along separate routes; 16-group unshakable in one's determination; 18-hollow runs through portion; I
1, I
2-electric current; C1, C2-electric capacity; L1, L2-inductive component.
Embodiment
See also the boost structural representation of shunt loading balance converter transformer structure of the utility model tool shown in Fig. 4 A～Fig. 4 B.Shown in Fig. 4 A, first side winding 12 is set around drum stand 5 with secondary side winding district 14, and secondary side winding district 14 can be divided into secondary side again and share winding 14a and secondary side shunt winding 14b, 14c.Secondary side is winding 14b along separate routes, the 14c coil uses single groove layer around mode, and its each end is shared winding 14a via lead terminal 7 and secondary side and is connected, the iron core group of forming by magnetic conduction subassembly 16, first 16a unshakable in one's determination, second 16b unshakable in one's determination passes hollow from drum stand 5 two ends respectively and runs through portion 18, be combined into a converter transformer with drum stand 5, make its first side winding 12 and 14 couplings of secondary side winding district, can stablize the output of converter transformer two ends induced voltage, its secondary side is winding 14b along separate routes, asking of 14c utilizes mutual response characteristic, drive two corresponding cold-cathode tube 2a respectively, 2b (as shown in Figure 5), with the load current of two cold-cathode tubes of balance, and then can produce uniform back light.
Again referring to Fig. 4 B, utilize secondary side respectively can produce mutual inductance effect and high frequency capacitance effect between the shunt among winding 14b, the 14c along separate routes, because, can be according to using size of current to increase or reducing the employed line of each winding footpath, so sharing winding 14a, secondary side must bear driving lamp tube current sum total, and secondary side shunt winding 14b, 14c only bear the electric current of single cold-cathode tube, so the coiling line footpath that the shared winding 14a of secondary side is adopted can be according to the total current size, obtain suitable copper cash external diameter, make the winding region utilance reach best applications.
See also the boost structural representation of shunt loading balance converter transformer structure of another tool of the utility model shown in Figure 6, wherein this drum stand 51 has hollow and runs through portion 18, and twine first side winding 12 and the shared winding 14a of secondary side respectively at drum stand 51, to carry out coupling, and utilizing first side winding 12 and secondary side to share winding 14a spacing increases or dwindles, adjust basic electrical characteristic requirement and reach, 52 of this drum stands have hollow equally and run through portion 18, and single groove layer is around secondary side shunt winding 14b, 14c, 14d, behind the 14e, utilize separation trough 17 to separate current potential between each winding again, make and produce undesirable mutual electromagnetic inductance effect and high frequency capacitance effect along separate routes between winding, influence each other and reach the load balance effect, because drum stand 5 is combined by drum stand 51 and drum stand 52, so first 16a unshakable in one's determination in group 16 unshakable in one's determination, after two the parallel hollows of second 16b unshakable in one's determination inserting in the drum stand 5 respectively run through portion 18 (belonging to drum stand 51 and drum stand 52 respectively), can constitute the magnetic circuit of a sealing, this secondary side winding 14b along separate routes again, 14c, 14d, 14e, with first side winding 12, secondary side is shared winding 14a and is produced coupling each other and be same magnetic circuit, so secondary side is winding 14b along separate routes, 14c, 14d, 14e also has boost function, so in the present embodiment, each along separate routes winding drive four tubes simultaneously respectively, also can reach the tool shunt loading balance converter transformer structure of boosting.
See also the boost wiring schematic diagram of shunt loading balance converter transformer structure of the utility model tool shown in Figure 7, for becoming big day by day in response to the LCD size, cold-cathode tube length increases, need higher driving voltage, as shown in Figure 7, so secondary side shunt winding 14b, 14d serial connection secondary side shunt winding 14e, 14c can be utilized two groove dividing potential drops, but and can improve also balanced load electric current of driving voltage.
See also boost another wiring schematic diagram of shunt loading balance converter transformer structure of the utility model tool shown in Figure 8; secondary side is shared winding 14a via outside line or lead terminal; connect secondary side winding 14b along separate routes; 14c one end; its secondary side is winding 14b along separate routes; each end of 14c connects the cold-cathode tube two ends; because the mode of connection of the utility model transformer; utilize modes such as voltage-phase and pipe end potential difference; can effectively solve in the known transformer; input between the pipe end; the problem (can reach 2mA usually) that the earth terminal skew is excessive, and then the aging problem of reddish tone appears in the single-ended electrode of solution fluorescent tube.Owing to produce the aging phenomenon of reddish tone, will influence the quality of backlight white light, thereby cause display quality to descend, the shunt loading balance converter transformer structure so the utility model tool boosts can significantly be improved the shortcoming of known transformer really.
More than describing in detail is specifying at a possible embodiments of the present utility model; this embodiment is not in order to limit scope of the present utility model; therefore allly do not break away from the equivalence that the utility model spirit does and implement or change, all should be contained within the protection range of the present utility model.
Claims (15)
1, a kind of tool shunt loading balance converter transformer structure of boosting, comprise: group unshakable in one's determination, have two or more magnetic conduction subassemblies, the stretch through hollow of drum stand of one or above magnetic conduction subassembly runs through portion, constitutes closed magnetic path footpath with all the other magnetic conduction subassemblies or has the closed magnetic path footpath of air gap;
Drum stand has a hollow and runs through portion, organizes the combination that stretches through for unshakable in one's determination, and is distinguished into the first side winding and the secondary side winding district of twining for coil in lateral margin; It is characterized in that:
The secondary side winding district is provided with secondary side and shares winding and secondary side shunt winding, two or more secondary sides along separate routes windings secondary side along separate routes winding be single groove layer around, and all each end of secondary side shunt winding coil is connected to the end that secondary side is shared winding via outside or lead terminal, and each adjacent secondary side shunt loading current and phase difference is less than 90 degree.
2, a kind of tool as claimed in claim 1 shunt loading balance converter transformer structure of boosting, it is characterized in that, drum stand is distinguished into and can be distinguished into shared winding of secondary side and secondary side shunt winding respectively with two or more secondary side winding districts that separate the secondary side winding district that is symmetrical in the first side winding position for the first side winding of coil winding, and each each end of secondary side shunt winding coil is connected to an end of the shared winding of secondary side of its identical symmetric position via outside or lead terminal.
3, a kind of tool as claimed in claim 1 shunt loading balance change of current depressor structure of boosting, it is characterized in that, drum stand be distinguished into the first side winding, the secondary side that twine for coil share winding, with secondary side winding along separate routes, first side winding and secondary side are shared winding and repeatedly are around in same position, and the end that its secondary side is shared winding coil is connected in whole secondary sides each end of winding coil along separate routes via outside or lead terminal.
4, a kind of tool as claimed in claim 1 shunt loading balance converter transformer structure of boosting is characterized in that drum stand is two or more, and group unshakable in one's determination stretches through wherein, has one or two above magnetic shunts in the same group unshakable in one's determination.
5, a kind of tool as claimed in claim 1 shunt loading balance converter transformer structure of boosting is characterized in that, this drum stand magnetic conduction subassembly outside with it is combined into a closed magnetic path footpath with air gap.
6, a kind of tool shunt loading balance converter transformer structure of boosting comprises:
Group unshakable in one's determination has two or more magnetic conduction subassemblies, and the stretch through hollow of drum stand of one or above magnetic conduction subassembly runs through portion, and magnetic conduction subassembly outside with it constitutes closed magnetic path footpath;
First drum stand is provided with a hollow and runs through portion, and its lateral margin is distinguished into for the secondary side in the first side winding of coil winding and secondary side winding district shares winding;
Second drum stand is provided with a hollow and runs through portion, it is characterized in that:
Second drum stand and first drum stand stretch through at the same time or separately for group unshakable in one's determination and are combined into an entity, this second drum stand lateral margin district is arranged with single groove floor around secondary side shunt winding, two or more secondary sides along separate routes windings secondary side along separate routes each end of winding be connected to the first side winding of twining first drum stand and the secondary side in secondary side winding district via outside or lead terminal and share the end that secondary side in the drum stand of winding is shared winding, each adjacent secondary side shunt loading current and phase difference is spent less than 90.
7, a kind of tool as claimed in claim 6 shunt loading balance converter transformer structure of boosting, it is characterized in that, first drum stand is distinguished into the first side winding of twining for coil in lateral margin, second drum stand is the secondary side winding district, the secondary side winding district then is distinguished into secondary side again and shares winding and secondary side shunt winding, and use two or more secondary sides windings along separate routes, each secondary side along separate routes winding be single groove layer around, and all secondary side along separate routes each end of winding coil be connected to the end that secondary side is shared winding via outside or lead terminal.
8, a kind of tool as claimed in claim 6 shunt loading balance converter transformer structure of boosting, it is characterized in that, first drum stand is distinguished into for the first side winding of coil winding and the secondary side in secondary side winding district in lateral margin shares winding, two or more drum stands are secondary side winding along separate routes, two or more secondary sides along separate routes windings secondary side along separate routes winding be single groove layer around, and all secondary side along separate routes each end of winding coil be connected to via outside or lead terminal and twine the end that first side winding and the secondary side in secondary side winding district are shared the shared winding of secondary side in the drum stand of winding.
9, a kind of tool as claimed in claim 6 shunt loading balance converter transformer structure of boosting is characterized in that, drum stand magnetic conduction subassembly outside with it constitutes a closed magnetic path footpath with air gap.
10, a kind of tool as claimed in claim 7 shunt loading balance converter transformer structure of boosting is characterized in that first drum stand is built in second drum stand, for the group unshakable in one's determination combination that stretches through.
11, a kind of tool shunt loading balance converter transformer structure of boosting comprises:
Group unshakable in one's determination has two or more magnetic conduction subassemblies, and the stretch through hollow of drum stand of one or above magnetic conduction subassembly runs through portion, and magnetic conduction subassembly outside with it constitutes closed magnetic path footpath;
Drum stand has a hollow and runs through portion, organizes the combination that stretches through for unshakable in one's determination, and is distinguished into the first side winding and the secondary side winding district of twining for coil in lateral margin; It is characterized in that:
The trivial secondary side that is divided into of secondary side winding is shared winding and two secondary side shunt windings, each secondary side along separate routes winding with two or more multiple-grooveds branches around, and two adjacent grooves are arranged is the load wiring end, and two secondary sides along separate routes each end of winding coil be connected to the end that secondary side is shared winding via outside or lead terminal.
12, a kind of tool as claimed in claim 11 shunt loading balance converter transformer structure of boosting, it is characterized in that, drum stand is distinguished into can be for the first side winding and two secondary side winding districts that separate to be symmetrical in the first side winding position of coil winding, its each secondary side winding district respectively is distinguished into secondary side again and shares winding and secondary side shunt winding, each secondary side along separate routes winding with two or more multiple-grooveds branches around, and two adjacent grooves are arranged is the load wiring end, and each two secondary side along separate routes each end of winding section coils secondary side of being connected to its identical symmetric position via outside or lead terminal share an end of winding.
13, a kind of tool as claimed in claim 11 shunt loading balance converter transformer structure of boosting, it is characterized in that, drum stand be distinguished into the first side winding, the secondary side that twine for coil share winding, with secondary side winding along separate routes, first side winding and secondary side are shared winding and repeatedly are around in same position, its secondary side is shared an end of winding coil, is connected in whole secondary sides each end of winding coil along separate routes via outside or lead terminal.
14, a kind of tool as claimed in claim 11 shunt loading balance converter transformer structure of boosting is characterized in that this drum stand is two or more, and via the combination that stretches through of iron core group, has one or two above magnetic shunts in the same group unshakable in one's determination.
15, a kind of tool as claimed in claim 11 shunt loading balance converter transformer structure of boosting is characterized in that, this drum stand magnetic conduction subassembly outside with it is combined into a closed magnetic path footpath with air gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520108883 CN2802675Y (en) | 2005-06-09 | 2005-06-09 | Converter transformer structure with step-up shunt loading balance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520108883 CN2802675Y (en) | 2005-06-09 | 2005-06-09 | Converter transformer structure with step-up shunt loading balance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2802675Y true CN2802675Y (en) | 2006-08-02 |
Family
ID=36847380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520108883 Expired - Fee Related CN2802675Y (en) | 2005-06-09 | 2005-06-09 | Converter transformer structure with step-up shunt loading balance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2802675Y (en) |
-
2005
- 2005-06-09 CN CN 200520108883 patent/CN2802675Y/en not_active Expired - Fee Related
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |