CN2369354Y - Multi-tube fluorescent light controlled by central electronic ballast - Google Patents

Abstract

The utility model relates to a multi-tube fluorescent lamp device controlled by a central electronic ballast, which is composed of a central electronic ballast 1 and more than two fluorescent lamp tube circuits 2 which are connected in parallel to the output end of the ballast 1, wherein the central electronic ballast 1 can also be composed of a rectifying filter circuit, a starting circuit, a half-bridge inverter circuit and an output filter circuit; the fluorescent lamp tube circuits 2 can be formed by the connection of a lamp tube G, a high-frequency electrical inductor L3, a capacitor C8 and a switch K. Compared with the existing electronic fluorescent lamp, the production cost of the multi-tube fluorescent lamp device is largely reduced, and the adaptive problem of the power factor, the harmonic content and the radio frequency interference to the electrical network voltage existing at present is solved or improved.

Description

The multi-tube fluorescent lamp device of central electronic ballast control

The utility model relates to a kind of circuit arrangement that discharge lamp starts and controls that is used for, and is meant a kind of multi-tube fluorescent lamp device that utilizes semiconductor device by the control of central electronic ballast especially.

Because having than incandescent lamp economize on electricity, life-span, electronic fluorescent lamp manys a lot of times, the good advantage of the soft color rendering of light, now positive part ground replacement incandescent lamp and obtain more and more widely application than incandescent lamp.But, also there are following shortcomings in electronic fluorescent lamp: 1. on the high side, this is to adopt an electric ballast because existing electronic fluorescent lamp generally all is a lamp, and the cost cost of electric ballast is higher, so the price of electronic fluorescent lamp is generally tens times and even tens times of incandescent lamp, the user who has is reluctant to accept; 2. power factor is lower, and the higher harmonic content height is big to electric network pollution; 3. there is electromagnetic radiation, disturbs the normal use of other electric equipment; 4. during voltage ripple of power network, the power of electronic fluorescent lamp has bigger variation, influences the ordinary life of fluorescent tube.

The problems referred to above at existing electronic fluorescent lamp device existence, the purpose of this utility model, be to provide a kind of multi-tube fluorescent lamp device by the control of central electronic ballast that can reduce cost significantly, also can make the power factor, harmonic content, radio frequency interference of this device and item technical indicators such as line voltage adaptability are improved or improve simultaneously.

Solution of the present utility model is as follows.Referring to Fig. 1 the utility model electricity functional-block diagram, circuit of the present utility model is made up of central electronic ballast 1 and the fluorescent tube circuit more than two 2 that is connected in parallel on central electronic ballast 1 output.

The utility model device with foregoing circuit structure, not to resemble the independent control mode that adopts a fluorescent tube one electric ballast the existing electronic fluorescent lamp, but adopt the centralized control of the shared cover central electronic ballast circuit of many fluorescent tubes more than two, can reduce cost significantly like this, and owing to the cost cost reduces significantly, therefore on circuit design, just there are financial resources to adopt the higher central electronic ballast circuit of technical indicator, so just can solve the foregoing problems that existing electronic fluorescent lamp exists, it is power factor, harmonic content, radio frequency interference, to problems such as line voltage adaptability, thereby make electronic fluorescent lamp obtain more general applying.

Below in conjunction with drawings and Examples the utility model is further described.

Fig. 1 is an electric functional-block diagram of the present utility model;

Fig. 2 is the embodiment of Fig. 1 a kind of physical circuit of the present utility model.

Referring to Fig. 2 and Fig. 1.Central electronic ballast 1 includes by diode D ₁To D ₄, electrochemical capacitor E ₁And common capacitor C ₁The current rectifying and wave filtering circuit that connects to form is by diode D ₅, bidirectional diode D ₆, resistance R ₆With R ₇And capacitor C ₂The start-up circuit that connects to form is by high-power FET M ₁With M ₂, transformer T ₁, voltage-stabiliser tube Z ₁With Z ₂, resistance R ₁To R ₅And capacitor C ₃To C ₅The half-bridge inversion circuit that connects to form is by inductance L ₁With L ₂And capacitor C ₆With C ₇The output filter circuit that connects to form.D in the current rectifying and wave filtering circuit ₁And D ₄Negative pole and E ₁And C ₁An end link to each other after, more respectively with start-up circuit in R ₆An end and half-bridge inversion circuit M ₁Drain electrode and C ₃And C ₄An end join D in the current rectifying and wave filtering circuit ₂And D ₃Positive pole, E ₁And C ₁The other end, start-up circuit in C ₂An end, half-bridge inversion circuit in R ₂, R ₄And C ₅An end be connected common jointly, D in the start-up circuit ₅Negative pole and R ₆And R ₇An end link to each other after, more respectively with half-bridge inversion circuit in M ₂Drain electrode, the negative pole of Z2, T ₁One end, the R of output winding ₁, R ₃And C ₃An end and output filter circuit in L ₁An end join D in the start-up circuit ₆An end and M ₂Grid and T ₁An end of an input winding link to each other C in the half-bridge inversion circuit ₄, C ₅And R ₅Link and output filter circuit in C ₆And C ₇Link be connected together altogether.M ₁And M ₂Can adopt IRF840.

Fluorescent tube circuit 2 is by fluorescent tube G, high-frequency inductor L ₃, capacitor C ₈Connect to form L with K switch ₃Be connected in an end of two filaments of G, C respectively with the end of K ₃Two ends be connected in the other end of two filaments of G, L respectively ₃Be connected in the output of central electronic ballast 1, i.e. L respectively with the other end of K ₃The other end and output filter circuit in L ₂And C ₇Link join C in the other end of K and the output filter circuit ₆And C ₇Link join.

When the 220V electric main is connected, through D ₁-D ₄Rectification, E ₁And C ₁On voltage is arranged, through R ₆And R ₇To C ₂Charging reaches bidirectional trigger diode D ₆Trigger voltage the time, D ₆Become low resistance, make C ₂Discharge produces a trigger impulse, makes half-bridge inversion circuit produce vibration, through L ₁, C ₆, L ₂And C ₇The filtering high order harmonic component is exported a high frequency voltage (as 20KHZ), through high-frequency inductor L ₃Deliver to the end of fluorescent tube G, deliver to the other end of fluorescent tube G through K switch, when K switch is closed, high-frequency inductor L ₃Filament and capacitor C through fluorescent tube G ₈Produce series resonance, make fluorescent tube G two ends generation higher voltage and be able to starter.When actual installation, the inductance L of the fluorescent tube circuit 2 among Fig. 2 ₃And capacitor C ₈Be contained in fluorescent tube G together, and K switch is contained in the place of handled easily, two filaments and capacitor C ₈Two ends also can parallel connection add a thermistor R _TCarry out pipeline start up by preheating.

As previously mentioned, be parallel with fluorescent tube circuit 2 more than two, be equipped with K switch in every fluorescent tube circuit 2 and control at the output of central electronic ballast 1.Adopt this scheme, can realize a shared cover central electronic ballast of fluorescent tube that big festive lantern is all, the shared cover central electronic ballast of all fluorescent tubes in the room, the shared cover central electronic ballast of all fluorescent tubes of first floor, one even several the shared cover central electronic ballasts of building.Certainly, so, the power capacity of the rectifying and wave-filtering of central electronic ballast part, inversion part, output filtering part should corresponding increase.Conversely, also can dispose the fluorescent tube of corresponding power according to the watt level of the central electronic ballast that provides, every lamp all can be controlled by switch separately.If fluorescent tube damages later on, only need to change fluorescent tube, its price is only slightly high than the ordinary incandescent lamp bubble.

Claims (4)

1, the multi-tube fluorescent lamp device of a kind of central electronic ballast control is characterized in that, its circuit is made up of central electronic ballast (1) and the fluorescent tube circuit more than two (2) that is connected in parallel on central electronic ballast (1) output.

2, the multi-tube fluorescent lamp device of central electronic ballast control as claimed in claim 1 is characterized in that central electronic ballast (1) includes by diode D ₁To D ₄, electrochemical capacitor E ₁And common capacitor C ₁The current rectifying and wave filtering circuit that connects to form is by diode D ₅, bidirectional diode D ₆, resistance R ₆With R ₇And capacitor C ₂The start-up circuit that connects to form is by high-power FET M ₁With M ₂, transformer T ₁, voltage-stabiliser tube Z ₁With Z ₂, resistance R ₁To R ₅And capacitor C ₃To C ₅The half-bridge inversion circuit that connects to form is by inductance L ₁With L ₂And capacitor C ₆With C ₇The output filter circuit that connects to form.

3, as the multi-tube fluorescent lamp device of claim 1,2 described central electronic ballast controls, it is characterized in that fluorescent tube circuit (2) is by fluorescent tube G, high-frequency inductor L ₃, capacitor C ₈Connect to form L with K switch ₃Be connected in an end of two filaments of G, C respectively with the end of K ₈Two ends be connected in the other end of two filaments of G, L respectively ₃Be connected in the output of central electronic ballast (1), i.e. L respectively with the other end of K ₃The other end and output filter circuit in L ₂And C ₇Link join C in the other end of K and the output filter circuit ₆And C ₇Link join.

4, the multi-tube fluorescent lamp device of central electronic ballast control as claimed in claim 3 is characterized in that, in two filaments and capacitor C ₈The two ends parallel connection add a thermistor RT.

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