CN201117401Y - Transformer for converter - Google Patents
Transformer for converter Download PDFInfo
- Publication number
- CN201117401Y CN201117401Y CNU2007200578322U CN200720057832U CN201117401Y CN 201117401 Y CN201117401 Y CN 201117401Y CN U2007200578322 U CNU2007200578322 U CN U2007200578322U CN 200720057832 U CN200720057832 U CN 200720057832U CN 201117401 Y CN201117401 Y CN 201117401Y
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- CN
- China
- Prior art keywords
- leakage inductance
- transformer
- magnetic conductive
- conductive board
- drum stand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to the technical field of high-voltage transformers, in particular to a transformer for a converter, which includes an iron core, a concentrating flux plate and a bobbin bracket, wherein, the iron core is a U shape or an E shape or a special structure evolved from the principle, which is inserted in the bobbin bracket; and the concentrating flux plate is the shape of the Chinese character ''Ri'' or the Chinese character ''Mu'' or a special structure evolved from the principle, which is arranged on the bobbin bracket and integrated with the iron core, so as to separate a primary side winding and a secondary side winding on the bobbin bracket by the concentrating flux plate area, form a stable magnetic line leakage channel, so that the transformer can have large and stable leakage inductance because of the special structure.
Description
Technical field:
The utility model relates to the high-tension transformer technical field, refers in particular to a kind of transformer that is used for converter.
Background technology:
Cathode fluorescent tube (CCFLs) therefore is applied to the backlight source of LCD widely because advantages such as in light weight, heating little and high electric light (electricity to light) conversion efficiencies.Light fluorescent tube and need higher starting resistor, and the cathode fluorescent tube external power supply is based on alternating electromotive force, its voltage and electric current all can't drive the cathode fluorescent tube running, therefore must utilize converter conversion, but voltage is promoted to the voltage of cooling cathode-luminescence fluorescent tube running.In the separated exciting drive circuit, be to utilize an exterior I C control voltage, when starting, provide a starting resistor to light fluorescent tube, again voltage is dropped to normal working voltage.In addition, the also necessary plus high-pressure electric capacity of drive circuit is adjusted the drive circuit characteristic with high capacitive reactance, reaches resonance when each fluorescent tube is started, and promotes the resonance gain of circuit, with smooth lamp tube starting.
In addition, drive under the occasion of many fluorescent tubes, because the difference of fluorescent tube self character causes the briliancy difference between the different fluorescent tubes, the high capacitance of high-voltage capacitance is anti-can be ordered about each lighting tube brightness and tends to be balanced.When but the capacitor value of high-voltage capacitance itself is big more, represent the electrical power of required consumption also high more, make converter that higher electrical power must be provided, just can provide drive circuit and fluorescent tube to operate needed electrical power.And increasing complexity and the manufacturing cost that high-voltage capacitance increases whole control circuit, the life-span of electric capacity is also low than other assembly in the drive circuit, is damaged easily after circuit constantly switches.
At transformer itself, the secondary side output of each drum stand also has inconsistent phenomenon, form output error, and different transformers drives in the occasion of output jointly, also can form the output difference, this error must add loop adjustment, so that error is adjusted in the allowable range, but can increase manufacturing cost yet add the loop.
In addition, the transformer that is applied to converter is when tube load power increases, and leakage inductance can be required to increase the demand that satisfies circuit relatively, and in order to solve the problem of lamp tube current balance, the error amount of leakage inductance also can be required in certain scope again.
The utility model content:
The purpose of this utility model is exactly the deficiency that exists at prior art and a kind of transformer that is used for converter is provided, and the leakage inductance amount of transformer is improved and reduce the error amount of transformer, realizes or reduces lamp tube current balance between each drum stand.
To achieve these goals, the technical solution adopted in the utility model is: comprise iron core, drum stand and magnetic conductive board, the inner hollow bulb that forms of drum stand, iron core places the hollow bulb of drum stand, magnetic conductive board comprises a body and two groups of protuberances, these two groups of protuberances are that the four side by this body stretches out and constitutes, and magnetic conductive board covers on the drum stand, and the protuberance at magnetic conductive board two ends is corresponding with two ends unshakable in one's determination.
Described surface unshakable in one's determination offers at least one groove, and magnetic conductive board is provided with at least one leakage inductance portion, and this leakage inductance portion is positioned at wherein between one group of protuberance, and the number of leakage inductance portion is corresponding with groove number unshakable in one's determination.
Described two groups of protuberances are positioned at the relative four side of body, and vertical or be not orthogonal to this body.
Described leakage inductance portion is made of at least one fin.
The outside of described drum stand is provided with primary side winding section, leakage inductance district and secondary side winding section, and the leakage inductance district is positioned between primary side winding section and the secondary side winding section.
The beneficial effects of the utility model are: utilize the setting of magnetic conductive board and leakage inductance portion, can be in order to decision leakage inductance amount and leakage inductance stability, and the output of balance secondary side reduces the error amount of exporting.And the lifting of leakage inductance amount, the leakage inductance that can further promote secondary side is anti-, when being applied to the cathode fluorescent tube drive circuit, can promote the anti-ratio to fluorescent tube capacitive reactance, induction reactance of secondary side leakage inductance, makes the influence power reduction of the characteristic of fluorescent tube to tube current itself.Do not need to have an opportunity plus high-pressure capacitance component more simultaneously, but directly utilize the high leakage inductance of secondary side to resist the resonance gain of adjusting each fluorescent tube, when the input starting resistor, form resonance phenomena to start each fluorescent tube.
Description of drawings:
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of the utility model drum stand;
Fig. 3 is the vertical view of the utility model magnetic conductive board;
Fig. 4 is the left view of the utility model magnetic conductive board;
Fig. 5 is the structural representation of the utility model iron core.
Embodiment:
See shown in Fig. 1 to 5, the utility model comprises unshakable in one's determination 1, drum stand 2 and magnetic conductive board 3, the drum stand 2 inner hollow bulbs 21 that form, unshakable in one's determination 1 places the hollow bulb 21 of drum stand 2, wherein unshakable in one's determination 1 is U type or E type or the special construction of complying with its principle evolution, magnetic conductive board 3 comprises a body 31 and two groups of protuberances 32, these two groups of protuberances 32 are that the four side by this body 31 stretches out and constitutes, wherein one group of protuberance 32 extends longer, another group protuberance 32 extends shorter, described 1 surface unshakable in one's determination offers at least one groove 11, magnetic conductive board 3 is provided with at least one leakage inductance portion 33, this leakage inductance portion 33 is wherein between one group of protuberance 32, and with another the group protuberance 32 be connected, the number of leakage inductance portion 33 is corresponding with groove 11 numbers of iron core 1, and magnetic conductive board 3 covers on the drum stand 2, and the protuberance 32 at magnetic conductive board 3 two ends is corresponding with unshakable in one's determination 1 two ends.
Described two groups of protuberances 32 are positioned at the relative four side of body 31, and vertical or be not orthogonal to this body 31.
Described leakage inductance portion 33 is to be made of at least one fin.
The outside of described drum stand 2 is provided with primary side winding section 22, leakage inductance district 24 and secondary side winding section 23, and leakage inductance district 24 is between primary side winding section 22 and secondary side winding section 23.
The utility model can strengthen the anti-ratio to the electrical characteristic of cathode fluorescent tube (CCFL) own of secondary side leakage inductance when being applied to the separated exciting drive circuit, reduce the influence power of fluorescent tube characteristic, allows the electrical characteristic of the anti-led drive circuit of leakage inductance of secondary side.Therefore do not need plus high-pressure electric capacity again, just can utilize high leakage inductance anti-, make each fluorescent tube reach resonance, in order to the startup of fluorescent tube, in other words, the utility model is the high capacitive reactance that utilizes high leakage inductance to resist to replace original high-voltage capacitance, adjust the drive circuit characteristic, when lighting fluorescent tube, allow fluorescent tube reach resonance.The anti-brightness that also can order about each fluorescent tube of the high leakage inductance of low error simultaneously tends to be balanced, and the difference because of each fluorescent tube electrical characteristic does not cause brightness inconsistent.
Claims (5)
1, a kind of transformer that is used for converter, comprise iron core, drum stand and magnetic conductive board, the inner hollow bulb that forms of drum stand, iron core places the hollow bulb of drum stand, it is characterized in that: magnetic conductive board comprises a body and two groups of protuberances, these two groups of protuberances are that the four side by this body stretches out and constitutes, and magnetic conductive board covers on the drum stand, and the protuberance at magnetic conductive board two ends is corresponding with two ends unshakable in one's determination.
2, a kind of transformer that is used for converter according to claim 1, it is characterized in that: described surface unshakable in one's determination offers at least one groove, magnetic conductive board is provided with at least one leakage inductance portion, and this leakage inductance portion is positioned at wherein between one group of protuberance, and the number of leakage inductance portion is corresponding with groove number unshakable in one's determination.
3, a kind of transformer that is used for converter according to claim 1 is characterized in that: described two groups of protuberances are positioned at the relative four side of body, and vertical or be not orthogonal to this body.
4, a kind of transformer that is used for converter according to claim 2 is characterized in that: described leakage inductance portion is made of at least one fin.
5, a kind of transformer that is used for converter according to claim 1, it is characterized in that: the outside of described drum stand is provided with primary side winding section, leakage inductance district and secondary side winding section, and the leakage inductance district is positioned between primary side winding section and the secondary side winding section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200578322U CN201117401Y (en) | 2007-09-30 | 2007-09-30 | Transformer for converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200578322U CN201117401Y (en) | 2007-09-30 | 2007-09-30 | Transformer for converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201117401Y true CN201117401Y (en) | 2008-09-17 |
Family
ID=39991979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200578322U Expired - Fee Related CN201117401Y (en) | 2007-09-30 | 2007-09-30 | Transformer for converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201117401Y (en) |
-
2007
- 2007-09-30 CN CNU2007200578322U patent/CN201117401Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080917 Termination date: 20120930 |