CN201117418Y

CN201117418Y - Converter one-drive-three transformer

Info

Publication number: CN201117418Y
Application number: CNU2007200584592U
Authority: CN
Inventors: 高禄彬
Original assignee: Dongguan Chuangci Magnetic Components Co ltd
Current assignee: Dongguan Chuangci Magnetic Components Co ltd
Priority date: 2007-10-19
Filing date: 2007-10-19
Publication date: 2008-09-17
Anticipated expiration: 2017-10-19

Abstract

The utility model relates to the technical field of high-voltage transformers, in particular to a converter one-push-three transformer which includes at least three middle columns, at least three concentrating flux plates, and coils. The transformer is characterized in that the coils are covered on the middle columns; one side of the each middle column is provided with a concentrating flux plate; the coils are provided with lighted lamps which can increase the ratio of the secondary side leakage inductance to the capacitance and inductance of the tubes, so as to lower the impact of the characteristics of the tubes on the current of the tubes; meanwhile, if possible, no external high-voltage capacitance assembly needs to be added but the high-leakage inductance on the secondary side is directly used to adjust the resonance plus of all tubes, to form the resonance phenomenon when the startup voltage is input and start all tubes.

Description

A kind of converter one pushes away three transformers

Technical field:

The utility model relates to the high-tension transformer technical field, refers in particular to a kind of converter one and pushes away three transformers.

Background technology:

Cathode fluorescent tube (CCFLs) is because advantages such as in light weight, heating little and high electric light (electricity to light) conversion efficiencies, therefore be applied to the backlight source of LCD widely, 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 high-voltage capacitance 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, be applied to the converter transformer when tube load power increases, 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, and because in order to reduce the cost of transformer, industry is conceived transformer of research and development always and is had many fluorescent tubes, and can make the scheme of lamp tube current balance.

The utility model content:

At the deficiencies in the prior art, the purpose of this utility model is to provide a kind of converter one to push away three transformers, one pushes away three or above transformer's primary current and reduce the leakage inductance error amount of transformer, reaches or reduces lamp current difference between each drum stand.

For achieving the above object, the utility model adopts following technical scheme: a kind of converter one pushes away three transformers, it comprises having three center pillars at least, have three magnetic conductive boards, coil at least, and it is characterized in that: be with coil on the center pillar, a side of center pillar is provided with magnetic conductive board.

Described center pillar is formed in one and magnetic circuit is half disrupted configuration.

Described center pillar is the bar construction of leading more than three, and leads rod and lead and be provided with the gap pad between the rod.

Described coil is provided with lights lamp.

Described magnetic conductive board is provided with the leakage field post.

Described center pillar is an I shape.

The utility model beneficial effect is: it comprises having three center pillars at least, have three magnetic conductive boards, coil at least, be with coil on the center pillar, one side of center pillar is provided with magnetic conductive board, center pillar is U, I shape, the center pillar that utilizes magnetic circuit half to disconnect or disconnect, integrated magnetic conductive board adds the serial connection mode of 1 ' coil or 3 ' coil, can or reduce the error amount of lamp current in order to balance.And the leakage field post of magnetic conductive board collocation U leads the error amount that the setting of excellent center pillar can promote the lifting of leakage inductance amount and reduce the leakage inductance amount, and the leakage inductance that further promotes secondary side is anti-, when being applied to the CCFLs drive circuit, can promote the anti-ratio of secondary side leakage inductance, make of the influence power reduction of the characteristic of fluorescent tube itself tube current to fluorescent tube capacitive reactance, induction reactance.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 the utility model embodiment one schematic diagram;

Fig. 2 is the utility model embodiment two schematic diagrames;

Fig. 3 is the utility model embodiment three schematic diagrames;

Fig. 4 is the utility model embodiment four schematic diagrames;

Fig. 5 is the utility model embodiment five schematic diagrames;

Fig. 6 is the utility model embodiment six schematic diagrames.

Embodiment:

See shown in Fig. 1,2,3,4,5,6, a kind of converter one pushes away three transformers, it comprises having three center pillars at least, have three magnetic conductive boards, coil at least, it is characterized in that: be with coil on the center pillar, one side of center pillar is provided with magnetic conductive board, coil is provided with lights lamp, and magnetic conductive board is provided with the leakage field post, and center pillar is an I shape.

For reaching above-mentioned purpose, the invention provides a kind of converter transformer, include center pillar, magnetic conductive board and several coils, ask for an interview figure one figure six.

Each is organized 32 coils and is connected in series each other, sees through current law, has the ability that 32 coil current balances are respectively organized in pressure, and can related pressure 31 coil current balances, reduces the current error between each fluorescent tube, asks for an interview figure one to figure three.

Some magnetic conduction version has the leakage field post, and its function promotes the leakage inductance amount for increasing the leakage of the magnetic line of force, asks for an interview figure four to figure six.

Wherein center pillar can be formed in one, and asks for an interview figure one, or leads rod institute by several I shapes and constituted, and asks for an interview figure two to figure four.Or lead shape rod institute by several U and constituted, ask for an interview figure five to figure six, U-shaped is led the leakage field post of excellent center pillar collocation magnetic conductive board, has the function that reduces leakage inductance amount error.

Each is organized 33 coils and is connected in series each other, sees through coupling theory and current law, has the ability that 32 coil current balances are respectively organized in pressure, and can related pressure 31 coil current balances, reduces the current error between each fluorescent tube, asks for an interview figure four to figure five.

Respectively the organizing 33 coils and can be connected in series each other of each transformer, see through coupling theory and current law, have the ability of respectively organizing 32 coil current balances of forcing each transformer, and can each transformer of related pressure respectively organize 31 coil current balances, reduce the current error between each fluorescent tube, ask for an interview figure six.

For making the purpose of this utility model, structure, feature and function thereof are had further understanding, embodiment is described in detail as follows.

Embodiment one, shown in Figure 1, a kind of converter one pushes away three transformers, center pillar is formed in one and magnetic circuit is half disrupted configuration, and utilize method, when being applied to the separated exciting drive circuit, can force respectively to organize the electric current unanimity of 32 coils 32 coil tandems, and then the lamp current that influences secondary side also can be consistent, reaches the purpose of lamp tube current balance.

Embodiment two, shown in Figure 2, a kind of converter one pushes away three transformers, center pillar is that three I shapes are led bar construction and magnetic circuit is complete disrupted configuration, and utilize method, when being applied to the separated exciting drive circuit, can force respectively to organize the electric current unanimity of 32 coils 32 coil tandems, and then the lamp current that influences secondary side also can be consistent, reaches the purpose of lamp tube current balance.

Embodiment three, shown in Figure 3, a kind of converter one pushes away three transformers, and center pillar is that three I shapes are led bar construction and magnetic circuit is complete disrupted configuration, and its magnetic conduction version has three leakage field posts, corresponding respectively three I shapes are led rod, increasing leakage inductance and to reduce the error of leakage inductance, and utilize the method with 32 coil tandems, when being applied to the separated exciting drive circuit, can force respectively to organize the electric current unanimity of 32 coils, and then the lamp current that influences secondary side also can be consistent, reaches the purpose of lamp tube current balance.

Embodiment four, shown in Figure 4, a kind of converter one pushes away three transformers, center pillar is that three I shapes are led bar construction and magnetic circuit is complete disrupted configuration, and its magnetic conduction version is compared simplification to some extent with figure three, have three leakage field posts, corresponding respectively three I shapes are led rod, to increase leakage inductance and to reduce the error of leakage inductance, and utilize method, when being applied to the separated exciting drive circuit, can force respectively to organize the electric current unanimity of 32 coils 33 coil tandems, and then the lamp current that influences secondary side also can be consistent, reaches the purpose of lamp tube current balance.

Embodiment five, shown in Figure 5, a kind of converter one pushes away three transformers, center pillar is that three U-shapeds are led bar construction and magnetic circuit is complete disrupted configuration, and its magnetic conduction version is compared simplification to some extent with figure three, have three leakage field posts, respectively corresponding three shape rods, to increase leakage inductance and to reduce the error of leakage inductance, and utilize method, when being applied to the separated exciting drive circuit, can force respectively to organize the electric current unanimity of 32 coils 33 coil tandems, and then the lamp current that influences secondary side also can be consistent, reaches the purpose of lamp tube current balance.

Embodiment six, shown in Figure 6, a kind of converter one pushes away three transformers, center pillar is that three U-shapeds are led bar construction and magnetic circuit is complete disrupted configuration, and its magnetic conduction version is compared simplification to some extent with figure three, have three leakage field posts, corresponding respectively three U-shapeds are led rod, to increase leakage inductance and to reduce the error of leakage inductance, and utilize method, when being applied to the separated exciting drive circuit, can force respectively to organize the electric current unanimity of 32 coils 33 coil tandems of two or more transformers, and then the lamp current that influences secondary side also can be consistent, reaches the purpose of lamp tube current balance.

The above embodiment, it is preferred embodiments of the present utility model, be not to limit the utility model practical range,, all should comprise in the utility model patent claim so all equivalences of doing according to the described structure of the utility model claim, feature and principle change or modify.

Claims

1, a kind of converter one pushes away three transformers, it comprise have three center pillars (1) at least, have three magnetic conductive boards (2) at least, coil (3), it is characterized in that: be wound with coil (3) on the center pillar (1), a side of center pillar (1) is provided with magnetic conductive board (2).

2, a kind of converter one according to claim 1 pushes away three transformers, it is characterized in that: described center pillar (1) is formed in one and magnetic circuit is half disrupted configuration.

3, a kind of converter one according to claim 1 pushes away three transformers, it is characterized in that: described center pillar (1) is the bar construction of leading more than three, and leads rod and lead and be provided with gap pad (6) between the rod.

4, a kind of converter one according to claim 1 pushes away three transformers, it is characterized in that: described coil (3) is provided with fluorescent tube (4).

5, a kind of converter one according to claim 1 pushes away three transformers, it is characterized in that: described magnetic conductive board (2) is provided with leakage field post (5).

6, a kind of converter one according to claim 1 pushes away three transformers, it is characterized in that: described center pillar (1) is an I shape.