CN1387392A - Light stabilizer of fluorescent lamp with stable brightness and stepless light regulation - Google Patents
Light stabilizer of fluorescent lamp with stable brightness and stepless light regulation Download PDFInfo
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- CN1387392A CN1387392A CN 02100421 CN02100421A CN1387392A CN 1387392 A CN1387392 A CN 1387392A CN 02100421 CN02100421 CN 02100421 CN 02100421 A CN02100421 A CN 02100421A CN 1387392 A CN1387392 A CN 1387392A
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Abstract
The present invention relates to a light stable set of fluorescent lamps. It consists of the power supply transfer circuit, the controlled switch power supply, the new type start circuit, the push-pull type inverter of fluorescent lamp, the fluorescent lamp, the lighting up circuit with high performance, the adjustable feed back circuit and the pulse width modulator. The invented light stable set is the electric product replacing ballast of fluorescent lamp. When voltage of the electric supply is varied beween 180V-245V, the fluorescent lamp, which uses the invented light stable set, can still emit the stable light flux. User can adjust knob of the brightness variohm, making the brightness of the fluorescence lamp be adjusted from the rated value to one-sixth of the rated value continuously. The fluorescent lamp has high luminous efficiency at low brightness.
Description
Technical field under the present invention is a lighting device, more particularly, the present invention relates to a kind of luminous electronic installation of fluorescent lamp that makes.
The representative works of background technology of the present invention are fluorescent lamp ballasts.Its brightness of fluorescent lamp of employing inductance type ballast changes greatly with the fluctuation of line voltage, and just starts difficulty when line voltage is low to moderate 180V.Though adopt its starting resistor of fluorescent lamp of electronic ballast can be low to moderate 100V, when mains fluctuation, the brightness of fluorescent lamp still changes thereupon.The desk lamp with dimmer switch of Xiao Shouing has only incandescent lamp a kind of in the market, its photochromic bad, efficient is low, the life-span is short, when using, be difficult to again coordinate with fluorescent lamp.
The objective of the invention is provides a kind of brightness that can make fluorescent lamp not to be subjected to the influence (hereinafter to be referred as brightness stability) of mains fluctuation and can be regulated the electronic installation (is the fluorescent lamp light stabilizer hereinafter to be referred as this device) of brightness of fluorescent lamp (hereinafter to be referred as stepless dimming) by the user continuously for resident family, for the functional part in the fluorescent lamp light stabilizer is carried out integrated laying the foundation.
Technical scheme of the present invention has successfully realized above-mentioned purpose, introduces this technical scheme and details thereof below with reference to embodiment and accompanying drawing.For the ease of distinguishing the difference of present embodiment and background technology, now will represent the relevant circuit theory diagrams of background technology to provide in the lump.In the accompanying drawings:
Fig. 1 is classical electronic ballast for fluoresent lamp electrical schematic diagram;
Fig. 2 is the classical basic square circuit schematic diagram of electronic ballast for fluoresent lamp;
Fig. 3 is the basic square circuit schematic diagram of steady load type fluorescent lamp light stabilizer;
Fig. 4 is the basic square circuit schematic diagram of stabilized power supply type fluorescent lamp light stabilizer;
Fig. 5 is a stable DC voltage-type fluorescent lamp light stabilizer electrical schematic diagram;
Fig. 6 is the adjustable feedback circuit electrical schematic diagram of current transformer sampling;
Fig. 7 is controlled (transistor) Switching Power Supply electrical schematic diagram.
Comprise the multiple electronic ballast for fluoresent lamp of Fig. 1 by analysis, be not difficult to summarize the basic square circuit schematic diagram of electronic ballast for fluoresent lamp of classics shown in Figure 2.In order to realize purpose of the present invention, automatically calm system principle is introduced in the fluorescence lamp lighting device, can obtain the steady load type and the basic square circuit schematic diagram of fluorescent lamp light stabilizer of stabilized power supply type as shown in Figure 3 as shown in Figure 4.Because push-pull type fluorescent lamp inverter 6 output inversion pulses, make the difference that has nothing obvious of the illumination effect of these two big schemes.Be embodiment only below, introduce the basic element of character, structure, operation principle and the feature technology index of fluorescent lamp light stabilizer with stable DC voltage-type fluorescent lamp light stabilizer (circuit is asked for an interview Fig. 5).
The fluorescent lamp light stabilizer is made up of seven parts such as power converting circuit 1, novel start-up circuit 2, controlled switching power supply 3, pulse-width modulator 4, adjustable feedback circuit 5, push-pull type fluorescent lamp inverter 6, fluorescent lamp and high-performance ignition circuits 7 thereof.In the present embodiment, correlation between these parts is: the input of civil power joining power translation circuit 1, and the output of power converting circuit 1 connects the power input of controlled switching power supply 3, the output of controlled switching power supply 3 connects the power input of push-pull type fluorescent lamp inverter 6 and the input of adjustable feedback circuit 5, the output of adjustable feedback circuit 5 connects the input of pulse-width modulator 4, the output of pulse-width modulator 4 connects the adjustment input of controlled switching power supply 3, the startup of novel start-up circuit 2/inhyibit wire connects push-pull type fluorescent lamp inverter 6, the output of push-pull type fluorescent lamp inverter 6 connects fluorescent lamp and high-performance ignition circuit 7 thereof.
The operation principle of present embodiment is: power converting circuit 1 is exported to controlled switching power supply 3 after converting civil power to direct current, controlled switching power supply 3 is transformed into new direct current to the direct current of input, flow to push-pull type fluorescent lamp inverter 6 and adjustable feedback circuit 5, adjustable feedback circuit 5 passes to pulse-width modulator 4 to the feedback factor that the voltage of controlled switching power supply 3 output and user determine, the direct voltage that pulse-width modulator 4 is adjusted controlled switching power supply 3 outputs according to feedback information makes it stable.When push-pull type fluorescent lamp inverter 6 did not vibrate, novel start-up circuit 2 sent starting impulse by startup/inhyibit wire and triggers the 6 generation vibrations of push-pull type fluorescent lamp inverter.After push-pull type fluorescent lamp inverter 6 produces vibration, on the one hand, send inhibit pulse, forbid that novel start-up circuit 2 sends starting impulse again, in order to avoid disturb the operate as normal of push-pull type fluorescent lamp inverter 6 by startup/inhyibit wire; On the other hand, the square wave inversion pulsed drive fluorescent lamp and the high-performance ignition circuit 7 thereof of 6 outputs of push-pull type fluorescent lamp inverter make fluorescent lamp luminous.
The circuit structure of power converting circuit 1 is, second terminal that second terminal that first terminal of civil power connects first terminal, the fuse 11 of fuse 11 connects first input terminal, the civil power of first terminal of high-frequency filter capacitor 12 and bridge rectifier 13 connects second terminal of high-frequency filter capacitor 12 and second input terminal of bridge rectifier 13.Its operation principle is: civil power is through the direct current of the unidirectional pulsation of bridge rectifier 13 outputs.
In this big electron-like device of switching mode DC stable power supply, performance best no more than transistor switch type DC stable power supply, circuit is the most succinct easily transfer surely belong to the controllable silicon DC stable power supply.In order to develop the stabilized power supply that is suitable for fluorescent lamp inverter, the inventor will influence classical controllable silicon D.C. regulated power supply performance, volume, weight, cost critical elements---smoothing reactor removes, means with reducing the regulating circuit dynamic property have createed the controllable silicon D.C. regulated power supply that volume is little, in light weight, cost is low.
The circuit structure of controlled switching power supply 3 is that second terminal of anodal first terminal that connects current-limiting resistance 23 of the rectifier power source of power converting circuit 1 output, current-limiting resistance 23 connects the negative pole of voltage stabilizing didoe 26 and the positive pole of electrolytic capacitor filter 24 is the accessory power supply positive pole, and the positive pole of voltage stabilizing didoe 26 connects the negative pole of electrolytic capacitor filter 24 and the rectifier power source negative pole of power converting circuit 1 output is the accessory power supply negative pole.First terminal and the in-phase input terminal of synchronous (integrated circuit) comparator 18, second terminal of sample resistance 15 that first terminal of the anodal connection of rectifier power source sample resistance 14, second terminal of sample resistance 14 connect sample resistance 15 connect the rectifier power source negative pole, and sample resistance 14 and 15 obtains the instantaneous value of line voltage; First terminal of first terminal connection accessory power supply positive pole of reference resistance 16, second terminal connection reference resistance 17 of reference resistance 16 and the reversed input terminal of sync comparator 18 and the reversed input terminal of (integrated circuit) phase comparator 28, second terminal of reference resistance 17 connect the rectifier power source negative pole, and reference resistance 16 and 17 provides the relatively reference level of usefulness for sync comparator 18; The lead-out terminal of sync comparator 18 connects second terminal and first terminal of timing capacitor 20 and first terminal and first terminal of regulating resistance 22 of buffer resistance 21 of timing resistor 19, first terminal of timing resistor 19 connects the accessory power supply positive pole, second terminal of timing capacitor 20 connects the rectifier power source negative pole, by sample resistance 14 and 15, reference resistance 16 and 17 and the synchronous circuit formed of sync comparator 18, near the zero point of civil power the electric charge on the timing capacitor 20 is all being bled off, civil power away from zero point after, the output of sync comparator 18 ends, and the electric current of accessory power supply by timing resistor 19 is conditioned the remainder that resistance 22 pulls away after the part timing capacitor 20 is charged.Second terminal of buffer resistance 21 connects the in-phase input terminal of phase comparator 28, the lead-out terminal of phase comparator 28 connects second terminal that triggers resistance 32 and suppresses first terminal of noise electric capacity 33 and the gate pole of controllable silicon 34, first terminal that triggers resistance 32 connects the accessory power supply positive pole, second terminal that suppresses noise electric capacity 33 connects the negative electrode and the rectifier power source negative pole of controllable silicon 34, by buffer resistance 21, reference resistance 16 and 17 and the level sensitive circuit formed of phase comparator 28, the output of phase comparator 28 ends when the terminal voltage of timing capacitor 20 surpasses reference level, triggers resistance 32 beginnings and provides gate current to controllable silicon 34.The anode of controllable silicon 34 connects the positive pole of fly-wheel diode 36 and the negative pole of electrolytic capacitor filter 39 is the negative pole or the ground of controlled switching power supply 3 output voltages, the negative pole of fly-wheel diode 36 connects first terminal and the rectifier power source positive pole of high frequency choke coil 38, the positive pole that second terminal of high frequency choke coil 38 connects electrolytic capacitor filter 39 is the positive pole of controlled switching power supply 3 output voltages, rectifier power source charges by 38 pairs of electrolytic capacitor filters 39 of high frequency choke coil after controllable silicon 34 conductings, the terminal voltage of electrolytic capacitor filter 39 rises gradually because the voltage of rectifier power source descends gradually, and controllable silicon 34 turn-offs voluntarily when the charging current of the controllable silicon 34 of flowing through is kept electric current less than it; High frequency choke coil 38 can alleviate the influence of switching pulse to civil power, and fly-wheel diode 36 can reduce the magnetic circuit gap of high frequency choke coil 38.Its operation principle is: the electric current that adjusting resistance 22 is pulled out from timing resistor 19 is many more, it is long more that timing capacitor 20 terminal voltages reach time of phase comparator 28 reference levels, the angle of flow of controllable silicon 34 is big more, the electric charge that electrolytic capacitor filter 39 obtains is few more, and the voltage of controlled switching power supply 3 outputs is low more; The electric current that adjusting resistance 22 is pulled out from timing resistor 19 is few more, it is short more that timing capacitor 20 terminal voltages reach the time of phase comparator 28 reference levels, the angle of flow of controllable silicon 34 is more little, and the electric charge that electrolytic capacitor filter 39 obtains is many more, and the voltage of controlled switching power supply 3 outputs is high more.
The circuit structure of pulse-width modulator 4 is, second terminal that first terminal of upper offset resistance 29 connects accessory power supply positive pole, upper offset resistance 29 connects the base stage of phototriode in first terminal of below-center offset resistance 30 and the photoelectrical coupler 31, second terminal of below-center offset resistance 30 connects the emitter and the rectifier power source negative pole of phototriode in the photoelectrical coupler 31, and upper offset resistance 29 and below-center offset resistance 30 can make in the photoelectrical coupler 31 the phototriode operating state good; The collector electrode of phototriode connects second terminal of inertia resistance 27 in the photoelectrical coupler 31, first terminal of inertia resistance 27 connects the anodal of inertia electric capacity 25 and regulates second terminal of resistance 22, the negative pole connection rectifier power source negative pole of inertia electric capacity 25, inertia resistance 27 and inertia electric capacity 25 can suppress the fluctuation of feedback information, make the instantaneous value of inertia electric capacity 25 terminal voltages relatively stable, regulate in the resistance 22 and flow through plateau current.Its operation principle is: the electric current of phototriode is big more in the photoelectrical coupler 31, and the electric charge that inertia resistance 27 is released from inertia electric capacity 25 is many more, and the terminal voltage of inertia electric capacity 25 is just low more; The electric current of phototriode is more little in the photoelectrical coupler 31, and the electric charge that inertia resistance 27 is released from inertia electric capacity 25 is few more, and the terminal voltage of inertia electric capacity 25 is just high more.
The circuit structure of adjustable feedback circuit 5 is that second terminal of brightness rheostat 37 connects the positive pole of controlled switching power supply 3 output voltages, first terminal and second terminal that cursor slide connects current-limiting resistance 35, first terminal of current-limiting resistance 35 of brightness rheostat 37 connects the minus earth of light-emitting diode in the positive pole of light-emitting diode in the photoelectrical coupler 31, the photoelectrical coupler 31.Its operation principle is: when controlled switching power supply 3 output voltages were higher, the electric current of light-emitting diode was with bigger than normal in flow through brightness rheostat 37 and current-limiting resistance 35 and the photoelectrical coupler 31, and the electric current of phototriode is also with bigger than normal in the photoelectrical coupler 31; When controlled switching power supply 3 output voltages were on the low side, the electric current of light-emitting diode was with less than normal in flow through brightness rheostat 37 and current-limiting resistance 35 and the photoelectrical coupler 31, and the electric current of phototriode is also with less than normal in the photoelectrical coupler 31; Brightness rheostat 37 changes feedback factor.
More than 5 three parts of controlled switching power supply 3 of Jie Shaoing and pulse-width modulator 4 and adjustable feedback circuit have constituted and have exported variable switching mode D.C. regulated power supply.Its operation principle is: if the output voltage of controlled switching power supply 3 is higher, electric current in the photoelectrical coupler 31 is with bigger than normal so, the terminal voltage of inertia electric capacity 25 is on the low side, and the electric current that adjusting resistance 22 is pulled out from timing resistor 19 is on the high side, and the voltage of controlled switching power supply 3 outputs descends.If the output voltage of controlled switching power supply 3 is on the low side, the electric current in the photoelectrical coupler 31 is with less than normal so, and the terminal voltage of inertia electric capacity 25 is higher, and the electric current that adjusting resistance 22 is pulled out from timing resistor 19 is on the low side, and the voltage of controlled switching power supply 3 outputs raises.Generally speaking, regardless of the fluctuation of controlled switching power supply 3 output voltages, control circuit can both automatically be regulated the angle of flow of controllable silicon 34, and controlled switching power supply 3 outputs are stabilized on the fixing voltage; Change the value of brightness rheostat 37, changed the feedback factor of adjustable feedback circuit 5 exactly, also just changed the output voltage of controlled switching power supply 3.The feature technology index of present embodiment is:
Rated power 40W;
VD 53V～210V is adjustable continuously;
Ripple voltage＜5V;
Experiment shows: the parameter of selecting inertia resistance 27 and inertia electric capacity 25 rightly and regulating resistance 22 is the basic assurance that does not have the controllable silicon D.C. regulated power supply reliability service of smoothing reactor; Suppress noise electric capacity 33 and can prevent that controllable silicon 34 is by false triggering; Buffer resistance 21 can reduce the influence of the internal circuit configuration of phase comparator 28 to timing circuit.
Classical fluorescent lamp ignition circuit, shortcoming such as the heater current when having rated operational voltage height, stable state is big, the luminous efficiency during low-light level is low.In order to overcome above-mentioned shortcoming, can take following scheme.
First input terminal of fluorescent lamp and high-performance ignition circuit 7 thereof is first terminal of resonant inductance 62.Second terminal of resonant inductance 62 connects second terminal of stopping direct current coupling capacitance 64, first terminal of stopping direct current coupling capacitance 64 connects second terminal of fluorescent lamp 63 second filaments.Two terminals after auxiliary resonance electric capacity 60 and 61 series connection of positive thermistor connect first terminal of fluorescent lamp 63 article one filaments and first terminal of fluorescent lamp 63 second filaments respectively, and auxiliary resonance electric capacity 60 and positive thermistor 61 are mainly used in and start fluorescent lamp 63.Two terminals after 66 series connection of main resonance electric capacity 65 and negative thermistor connect second terminal of fluorescent lamp 63 article one filaments and second terminal of fluorescent lamp 63 second filaments respectively, main resonance electric capacity 65 main effects are to reduce the rated operational voltage of fluorescent lamp and high-performance ignition circuit 7 thereof, and negative thermistor (66) is mainly used in the resonance frequency of stablizing in the transient process.Two terminals of pulse transformer 57 Filament Winding 58 connect with two terminals of fluorescent lamp 63 article one filaments respectively, and two terminals of pulse transformer 57 Filament Winding 59 connect with two terminals of fluorescent lamp 63 second filaments respectively; They are as independent current source, to the luminous efficiency of Filament of fluorescent lamp heating can raising fluorescent lamp when the low-light level.Second terminal of fluorescent lamp 63 article one filaments is second input terminal of fluorescent lamp and high-performance ignition circuit 7 thereof.
The excitation energy of fluorescent lamp and high-performance ignition circuit 7 thereof is square-wave pulses of push-pull type fluorescent lamp inverter 6 outputs.When fluorescent lamp 63 is unignited, resistance resistance very little, negative thermistor 66 the series resonant tank resistive component very big, circuit equivalent of positive thermistor 61 is very little, resonance current flows through fluorescent lamp 63 filaments very greatly and nearly all, fluorescent lamp 63 filaments are rapidly heated and are produced very high resonance potential rapidly at the two ends of auxiliary resonance electric capacity 60, and the mercury vapour in the fluorescent lamp 63 will be provoked into the avalanche and discharge state.After fluorescent lamp 63 was lighted, because the resonance current in the circuit has increased the discharge paths of mercury vapour again, so the resistive component in the series resonant tank increases considerably, this had caused resonance current to reduce significantly.The resonance current of this moment can only produce certain resonance potential at auxiliary resonance electric capacity 60 and the main two ends of resonant capacitance 65 that help, and keeps mercury vapor discharge.Along with positive thermistor 61 and the growth of 66 operating times of negative thermistor, their body temperature continues to rise, and the resistance of positive thermistor 61 constantly increases, the resistance of negative thermistor 66 constantly reduces.Meanwhile, the electric current of auxiliary resonance electric capacity 60 branch roads is more and more littler, and the electric current of main resonance electric capacity 65 branch roads is increasing, and when the temperature of positive thermistor 61 and negative thermistor 66 entered stable state, fluorescent lamp 63 had just entered a stable luminance.
Experiment shows: when the operating voltage of fluorescent lamp and high-performance ignition circuit 7 thereof was reduced to 210V, fluorescent lamp sent the temperature and the not obviously difference of standard state of specified brightness and its glower end; When the inversion pulse voltage peak-to-peak value of input changes in 208V～51V scope, the brightness of fluorescent lamp will change to below the sixth of this rated value from its rated value; When fluorescent lamp is unignited, about 1 ampere of the starting current of process Filament of fluorescent lamp; After fluorescent lamp was lighted, the filament heating current of process auxiliary resonance electric capacity 60 was reduced to about 40 milliamperes.
Need four discrete components in classical start-up circuit 3 ', its shortcoming is: the volume of element is big, operating voltage is high and circuit loss is big.For integrated circuit technique is applied in the start-up circuit, can take following scheme.
The circuit structure of novel start-up circuit 3 is: the lead-out terminal of lock-out pulse comparator 18 connects the input of integrated circuit NAND gate 43, and NAND gate 43 is accepted an input pulse every 10mS.The gate terminals of first terminal connection accessory power supply positive pole of charging resistor 40, second terminal connection NAND gate 43 of charging resistor 40 and first terminal of timing capacitor 41 and first terminal of discharge resistance 42, second terminal of timing capacitor 41 connect the rectifier power source negative pole, when push-pull type fluorescent lamp inverter 6 does not vibrate, do not have electric current in the discharge resistance 42, the gate terminals of NAND gate 43 is a high level.The output of NAND gate 43 connects first terminal of current-limiting resistance 45 and the positive pole of damper diode 44, the negative pole of damper diode 44 connects the accessory power supply positive pole, second terminal of current-limiting resistance 45 connects second terminal starting winding 56 and the negative pole of discharge diode 46, first terminal that starts winding 56 connects the accessory power supply positive pole, the positive pole of discharge diode 46 connects second terminal of discharge resistance 42, when the gate terminals of NAND gate 43 is high level, its output of input pulse of NAND gate 43 every acceptance just becomes low level, and this low level starts winding 56 de-energisation triodes 49 through current-limiting resistance 45 driving pulse transformers 57 and causes the 6 generation vibrations of push-pull type fluorescent lamp inverter; After 6 vibrations of push-pull type fluorescent lamp inverter; start winding 56 and will export induced electromotive force; the damped diode 44 clampers protection of the positive potential of this induced electromotive force NAND gate 43; the negative potential of this induced electromotive force is opened discharge diode 46; discharge resistance 42 pulls into low level with the terminal voltage of timing capacitor 41 and closes NAND gate 43, makes it no longer send the operate as normal that starting impulse disturbs inverter.
The circuit structure of push-pull type fluorescent lamp inverter 6 is: the collector electrode of triode 47 connects the positive pole of controlled switching power supply 3 output voltages, the emitter of triode 47 connects first terminal of negative feedback resistor 48, the base stage of triode 47 connects first terminal of current-limiting resistance 51, second terminal of current-limiting resistance 51 connects first terminal of pulse transformer 57 base stage windings 53, second terminal of negative feedback resistor 48 connects second terminal and first terminal of pulse transformer 57 former limit windings 54 and the collector electrode of triode 49 of base stage winding 53, the emitter of triode 49 connects first terminal of negative feedback resistor 50, the base stage of triode 49 connects first terminal of current-limiting resistance 52, second terminal of current-limiting resistance 52 connects first terminal of pulse transformer 57 base stage windings 55, second terminal of negative feedback resistor 50 connects second terminal and the ground connection of base stage winding 55, and second terminal of former limit winding 54 and the collector electrode of triode 47 are two lead-out terminals of push-pull type fluorescent lamp inverter 6.
The operation principle of push-pull type fluorescent lamp inverter 6 is: when inverter vibrates, produce base current by start-up circuit driver triode 49.In case triode 49 has produced base current, the electric current of controlled switching power supply 3 outputs is through the negative pole of fluorescent lamp and high-performance ignition circuit 7 → former limit winding 54 → triode 49 → negative feedback resistor 50 → controlled switching power supply 3 output voltages thereof; Because the electric current during this is that the end of the same name from former limit winding 54 flows to and increasing gradually,, the induced electromotive force that base stage winding 55 produces but make triode 47 quicken to end so impelling triode 49 to quicken the induced electromotive force that saturation conductions, base stage winding 53 produce; After triode 49 conductings, its collector current I
C2Rising, saturation depth descend gradually gradually, and when triode 49 entered the linear work district, inverter produced and changes line state.At this moment, the induced electromotive force of base stage winding 53 generations but makes triode 49 quicken to end by the induced electromotive force that current-limiting resistance 51 produces triode 47 acceleration saturation conductions, base stage winding 55; During this period, fluorescent lamp and high-performance ignition circuit 7 energy stored thereof are by way of the positive pole → triode 47 → negative feedback resistor 48 → former limit winding 54 → fluorescent lamp and 7 releases of high-performance ignition circuit thereof of controlled switching power supply 3 output voltages.After triode 47 conductings, its collector current I
C1Rise gradually, saturation depth descends gradually, when triode 47 entered the linear work district, inverter produced again and changes line state, circuit returns to the state that triode 49 conductings, triode 47 end.Like this, both finish a cycle of oscillation, carried out a new cycle of oscillation again.Inverter starts the induced electromotive force of winding 56 outputs in oscillatory process, can be used as inhibit pulse and close novel start-up circuit 2.
The advantage of invention mainly contains following five.
1. brightness stability and adaptation voltage range are wide.When line voltage changed between 180V～245V, the variation of brightness of fluorescent lamp can not surpass 3%, and this is that fluorescent lamp ballast can't be accomplished.
2. stepless dimming and dimming scope are big.Use brightness of fluorescent lamp of the present invention, can change to below the sixth of this rated value from its rated value by brightness rheostat in the adjusting fluorescent lamp light stabilizer.People can enjoy that good photochromic and high luminous efficiency of fluorescent lamp and long advantages such as life-span, can live in the environment of comfortable illumination again, more can simplify indoor lighting installation widely.
3. power saving.Use fluorescent lamp of the present invention, its electrical source consumption reduces along with the reduction of brightness of fluorescent lamp, so also saved electric energy when reducing brightness of fluorescent lamp; It is many more that low more its luminous efficiency of the brightness of fluorescent lamp improves.
4. long service life.Use brightness of fluorescent lamp of the present invention and can not surpass its rated value, avoided the acceleration aging phenomenon; When the low-light level state, because of life-span that reduces of discharging current increases; Because the present invention possesses dimming function, must reduce the switch number of times of fluorescent lamp in actual use, makes the sputter of electrode material and evaporation significantly reduce, and has prolonged the actual life of fluorescent lamp.
The best way of realization invention is set forth respectively by following three aspects.
Aspect the circuit overall structure, adopt steady load type fluorescent lamp light stabilizer effect meeting shown in Figure 3 better, because the variation of circuit parameter can be reduced to minimum to the influence of big closed circuit operating state.A typical measure of steady load type is to stablize the fluorescent lamp electric current, and Fig. 6 is a kind of embodiment that Current Transformer is taken out fluorescent lamp current specimen (adjustable feedback circuit 5).Load resistance 71 can make the waveform of current transformer 72 outputs good among the figure, rectifier bridge 70 and electrolytic capacitor filter 69 become the direct current form with the load current information translation of alternation, resistance 68 and 67 and brightness rheostat 37 constitute adjustable voltage dividers and give pulse-width modulator 4 the load current feedback information of record on the electrolytic capacitor filter 69, brightness rheostat 37 changes feedback factors.
Aspect basic circuit structure, adopt the VMOS field effect transistor as switch adjustment pipe, with MOS structure monolithic integrated circuit switching power supply control chip ST3845 be the center controlled switching power supply 3 as shown in Figure 7.Field effect transistor 82 is adjusted output voltage as switching tube among the figure, and protective resistance 81 prevents that the grid voltage rate of change of field effect transistor 82 is too fast; Ripple in resistance 76 and the electric capacity 77 filtering feedback informations is avoided frequent adjustment; The switch periods of timing resistor 78 and timing capacitor 80 decision controlled switching power supplies 3; Resistance 74 is the source current sample resistance, and the ripple of resistance 73 and electrochemical capacitor 75 filter out power current specimen is for the protective circuit effective action creates conditions.If it is can adopt integrated circuit technique that functions such as controlled switching power supply 3, pulse-width modulator 4, adjustable feedback circuit 5 and novel start-up circuit 2 are integrated on the chip piece, that the external circuit that makes the fluorescent lamp light stabilizer is very simple and increase substantially all other technical indicators.
Aspect physical structure, first kind of application scheme is that mains switch and dimmer are separated from the fluorescent lamp light stabilizer, be installed in the box structure, be embedded within the walls user-friendly or wall on, the remainder of fluorescent lamp light stabilizer is installed in another box structure, be installed in fluorescent lamp near; Second kind of application scheme be integral installation with the fluorescent lamp light stabilizer in a box structure, be embedded within the walls user-friendly or wall on.
Claims (6)
1. brightness stability, the fluorescent lamp light stabilizer of stepless dimming, comprise power converting circuit (1), power converting circuit (1) is transformed into direct current to civil power and uses for system, push-pull type fluorescent lamp inverter (6), push-pull type fluorescent lamp inverter (6) is reverse into high-frequency impulse driving fluorescent lamp ignition circuit with the direct current energy of input, it is characterized in that: the output of power converting circuit (1) connects the power input of controlled switching power supply (3), the output of controlled switching power supply (3) connects the power input of push-pull type fluorescent lamp inverter (6) and the input of adjustable feedback circuit (5), controlled switching power supply (3) is transformed into new direct current to the direct current of power converting circuit (1) output, flows to push-pull type fluorescent lamp inverter (6) and adjustable feedback circuit (5); The output of adjustable feedback circuit (5) connects the input of pulse-width modulator (4), and adjustable feedback circuit (5) passes to pulse-width modulator (4) to the feedback factor that the output voltage of controlled switching power supply (3) and user determine; The output of pulse-width modulator (4) connects the adjustment input of controlled switching power supply (3), and the direct voltage that pulse-width modulator (4) is adjusted controlled switching power supply (3) output according to feedback information makes it stable; The startup of novel start-up circuit (2)/inhyibit wire connects push-pull type fluorescent lamp inverter (6), and novel start-up circuit (2) sends starting impulse by startups/inhyibit wire and triggers push-pull type fluorescent lamp inverter (6) and produce and vibrate or accept inhibit pulse and no longer send starting impulse; The output of push-pull type fluorescent lamp inverter (6) connects fluorescent lamp and high-performance ignition circuit (7) thereof, and the inversion pulse of push-pull type fluorescent lamp inverter (6) output makes fluorescent lamp and high-performance ignition circuit (7) thereof light fluorescent lamp.
2. the brightness stability described in claim 1, the fluorescent lamp light stabilizer of stepless dimming, wherein said controlled switching power supply (3) comprises the accessory power supply of being made up of current-limiting resistance (23) and electrolytic capacitor filter (24) and voltage stabilizing didoe (26), the timing circuit that is composed in series by timing resistor (19) and timing capacitor (20), controllable silicon (34), fly-wheel diode (36) and electrolytic capacitor filter (39), its technical characterictic is: the location of lock-out pulse is carried out for the synchronous circuit of core by integrated circuit comparator (18), for the phase detecting circuit of core carries out, high frequency choke coil (38) can alleviate the influence of switching pulse to civil power by integrated circuit comparator (28) in the triggering of controllable silicon (34).
3. the brightness stability described in claim 1, the fluorescent lamp light stabilizer of stepless dimming, the technical characterictic of wherein said pulse-width modulator (4) is: first terminal of upper offset resistance (29) connects the accessory power supply positive pole, second terminal of upper offset resistance (29) connects the base stage of first terminal and the middle phototriode of photoelectrical coupler (31) of below-center offset resistance (30), second terminal of below-center offset resistance (30) connects the emitter and the rectifier power source negative pole of phototriode in the photoelectrical coupler (31), and upper offset resistance (29) and below-center offset resistance (30) can make the middle phototriode operating state of photoelectrical coupler (31) good; First terminal of second terminal of the collector electrode of phototriode connection inertia resistance (27), inertia resistance (27) connects second terminal of the positive pole of inertia electric capacity (25) and adjusting resistance (22) in the photoelectrical coupler (31), the negative pole of inertia electric capacity (25) connects the rectifier power source negative pole, phototriode in the photoelectrical coupler (31) and inertia resistance (27) make the instantaneous value of inertia electric capacity 25 terminal voltages relatively stable, regulate the output voltage that resistance (22) can steadily change controlled switching power supply (3).
4. the brightness stability described in claim 1, the fluorescent lamp light stabilizer of stepless dimming, the technical characterictic of wherein said adjustable feedback circuit (5) is: the positive pole of light-emitting diode is together in series in brightness rheostat (37) and current-limiting resistance (35) and the photoelectrical coupler (31), the positive pole of controlled switching power supply (3) output voltage connects brightness rheostat (37), the minus earth of light-emitting diode in the photoelectrical coupler (31), brightness rheostat (37) changes feedback factor, and light-emitting diode passes to pulse-width modulator (4) to the feedback factor that the voltage of controlled switching power supply (3) output and user determine in the photoelectrical coupler (31).
5. the brightness stability described in claim 1, the fluorescent lamp light stabilizer of stepless dimming, wherein said fluorescent lamp and high-performance ignition circuit (7) thereof comprise that first terminal of resonant inductance (62) and second terminal of fluorescent lamp (63) article one filament are two input terminals of fluorescent lamp and high-performance ignition circuit (7) thereof, second terminal of resonant inductance (62) connects second terminal of stopping direct current coupling capacitance (64), first terminal of stopping direct current coupling capacitance (64) connects second terminal of fluorescent lamp (63) second filament, it is characterized in that two terminals after auxiliary resonance electric capacity (60) and positive thermistor (61) series connection connect first terminal of fluorescent lamp article one filament and first terminal of fluorescent lamp second filament respectively, auxiliary resonance electric capacity (60) and positive thermistor (61) are mainly used in the startup fluorescent lamp; Two terminals after the series connection of main resonance electric capacity (65) and negative thermistor (66) connect second terminal of fluorescent lamp article one filament and second terminal of fluorescent lamp second filament respectively, main resonance electric capacity (65) is mainly used in the rated operational voltage that reduces fluorescent lamp and high-performance ignition circuit (7) thereof, and negative thermistor (66) is mainly used in the resonance frequency of stablizing in the transient process; Two terminals of Filament Winding (58) connect with two terminals of fluorescent lamp article one filament respectively, two terminals of Filament Winding (59) connect with two terminals of fluorescent lamp second filament respectively, and they are to the luminous efficiency of Filament of fluorescent lamp heating can raising fluorescent lamp when the low-light level.
6. the fluorescent lamp light stabilizer of the brightness stability described in claim 1, stepless dimming, the technical characterictic of wherein said novel start-up circuit (3) are to start winding (56) with the form excitation that integrated circuit NAND gate (43) constitutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02100421 CN1387392A (en) | 2001-05-18 | 2002-01-28 | Light stabilizer of fluorescent lamp with stable brightness and stepless light regulation |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01118150 | 2001-05-18 | ||
| CN01118150.8 | 2001-05-18 | ||
| CN 02100421 CN1387392A (en) | 2001-05-18 | 2002-01-28 | Light stabilizer of fluorescent lamp with stable brightness and stepless light regulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1387392A true CN1387392A (en) | 2002-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02100421 Pending CN1387392A (en) | 2001-05-18 | 2002-01-28 | Light stabilizer of fluorescent lamp with stable brightness and stepless light regulation |
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| Country | Link |
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| CN (1) | CN1387392A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101505573A (en) * | 2009-02-03 | 2009-08-12 | 深圳市力诚照明电器有限公司 | Florescent lamp regulating method |
| CN1995999B (en) * | 2006-12-29 | 2010-05-12 | 湖南三德科技发展有限公司 | Calorimeter with power supply stabilizer |
| CN101617566B (en) * | 2005-07-05 | 2012-02-08 | 卢昭正 | Power source apparatus |
| CN104754844A (en) * | 2015-03-03 | 2015-07-01 | 杭州鸿雁东贝光电科技有限公司 | Electronic ballast for fluorescent lamp |
-
2002
- 2002-01-28 CN CN 02100421 patent/CN1387392A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101617566B (en) * | 2005-07-05 | 2012-02-08 | 卢昭正 | Power source apparatus |
| CN1995999B (en) * | 2006-12-29 | 2010-05-12 | 湖南三德科技发展有限公司 | Calorimeter with power supply stabilizer |
| CN101505573A (en) * | 2009-02-03 | 2009-08-12 | 深圳市力诚照明电器有限公司 | Florescent lamp regulating method |
| CN104754844A (en) * | 2015-03-03 | 2015-07-01 | 杭州鸿雁东贝光电科技有限公司 | Electronic ballast for fluorescent lamp |
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