CN105072766B - Multifunctional emergency light supply unit and its control method - Google Patents

Multifunctional emergency light supply unit and its control method Download PDF

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Publication number
CN105072766B
CN105072766B CN201510518112.0A CN201510518112A CN105072766B CN 105072766 B CN105072766 B CN 105072766B CN 201510518112 A CN201510518112 A CN 201510518112A CN 105072766 B CN105072766 B CN 105072766B
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voltage
resistance
circuit
optocoupler
current
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CN105072766A (en
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吴福林
陈开富
陈威伟
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XIAMEN INNOV CHARGE SOURCE ELECTRONICS Co Ltd
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XIAMEN INNOV CHARGE SOURCE ELECTRONICS Co Ltd
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Abstract

Invention provides a kind of multifunctional emergency light supply unit, including switching power circuit, battery module circuit, control circuit and voltage increase and current constant circuit.The present invention combines emergency light and normal illumination lamp, the dual function of emergency light and general illumination lamp is taken into account simultaneously, these three working conditions of standby mode of operation, normal operating conditions and the firmware-error state of design make LED light realize the working condition of different electric currents, are suitable for various external environment conditions.

Description

Multifunctional emergency light supply unit and its control method
Technical field
The present invention relates to a kind of emergency light and control method more particularly to a kind of multifunctional emergency light supply unit and its controls Method processed, the control method are suitable for various emergency driving power supplys, charging unit or light-emitting device etc..
Background technology
The purposes of emergency driving power supply is very extensive, and present emergency power supply largely uses simple and mechanical on-off mode, breaks Manual switch is needed in the case of electricity.Market does not need to manual switch yet, but its light cannot be adjusted, battery power consumption compared with Soon, it needs battery capacity bigger, does not work usually also, it is just bright in the case of only powering off.Similar these emergency lights driving electricity Source circuit function is single, does not integrate, it is impossible to be controlled for various ambient conditions, use inconvenience.
Invention content
The technical problem to be solved in the present invention is to provide a kind of multifunctional emergency light supply unit, including Switching Power Supply Circuit, battery module circuit, control circuit and voltage increase and current constant circuit;Primary side feedback IC1 is used in the switching power circuit, Including current rectifying and wave filtering circuit, DC-DC conversion circuit and direct current regulation circuit, the input terminal access city of the current rectifying and wave filtering circuit The input terminal of electricity, the output terminal of current rectifying and wave filtering circuit and DC-DC conversion circuit connects, the input terminal of the direct current regulation circuit with The output terminal connection of DC-DC translation circuits, the input terminal of the battery module circuit and the output terminal of direct current regulation circuit connect Connect, the direct current regulation circuit, the battery module circuit output terminal connect with the input terminal of voltage increase and current constant circuit, the liter The output terminal of pressure constant-current circuit is connected with LED light, defeated with control circuit after the output terminal connection divider resistance of current rectifying and wave filtering circuit Enter end connection, the control circuit includes comparator IC2 and detection circuit, and L, N both ends of the detection circuit connection alternating current are simultaneously A reference voltage value is provided, the comparator IC2 used in the control circuit is to L, N both ends input voltage and the reference voltage value One comparing voltage value is provided after being compared, the light modulation IC3 used in the voltage increase and current constant circuit according to the comparing voltage value to LED light exports corresponding current value, and the current rectifying and wave filtering circuit includes safe capacitance CX1, common mode inductance LF1 and resistance R1, R2 The EMI filter circuit of composition and rectifier bridge BD1, the DC-DC conversion circuit include IC1, diode D8 and electrolytic capacitor EC6, common mode inductance LF2 and electrolytic capacitor EC7 composition filter circuit, the direct current regulation circuit include IC1, resistance R5, R6, R7 and transformer;After the alternating current L termination fuses F1, it will be exchanged by EMI filter circuit to rectifier bridge BD1 progress rectifications defeated Enter and switch to direct current output, then the valley fill circuit formed through electrolytic capacitor EC1, EC2 and diode D1, D2, D3 filters to obtain Gao Gong Rate factor direct current output;The AC energy of transformation is generated on IC1 control primary windings TR1 and is coupled to secondary windings On TR3, secondary windings TR3 is rectified into direct current using diode D8, by electrolytic capacitor EC6, common mode inductance LF2, electrolysis electricity Steady dc voltage, diode D4, resistance R3, resistance R4 and capacitance C2 compositions are obtained after holding the filter circuit of EC7 compositions RCD clamper absorbing circuits carry out clamper to the pin 6 of IC1;Resistance R5, R6, R7 one end connects the FB feet of IC1, and resistance R5's is another One terminates transformer auxiliary winding TR2, is according to FB feet inside the turn ratio and IC1 of auxiliary winding TR2 and secondary windings TR3 2.0V reference voltage relationships provide the negative-feedback signal of secondary windings TR3 and armature winding TR1 so that secondary windings TR3 To one stable voltage of battery module circuit output;The CS heels of resistance R9 connections IC1 are carried out according to the voltage value on resistance R9 Overload protection, R6, R7, R9 other end ground connection.
Further, the control circuit includes resistance R23, one end connection zener diode U1 of resistance R23, another The VCC feet of end connection IC2, resistance R23 connect the in-phase end of comparator IC2 by resistance R26, and rectifier bridge BD1 anodes are by dividing Piezoresistance R12, R13, R14 are grounded, and the divider resistance R14 other ends are connected to the reverse side of comparator IC2 by resistance R24;VCC feet Optocoupler PH is connected, and connects resistance R18 and triode Q1, the collector of triode Q1 is connected to resistance R14 by resistance R20.
Further, the detection circuit is terminated with capacitance C7, resistance R22 and rectifier bridge BR2 including L, N two, and obtains The DC voltage of one low current is connected to optocoupler PH2, optocoupler PH2 connections by electrolytic capacitor EC5 filtering and resistance R21 current limlitings The DIM feet of the collector connection light modulation IC3 of triode Q2, triode Q2.
Further, the direct current regulation circuit includes resistance R32, R33, R34 and zener diode U2, battery module electricity Road output end voltage V+ after resistance R32, R33, R34 and zener diode U2 by obtaining burning voltage V1, burning voltage V1 =(2.5*R33)/R34.
Further, the voltage increase and current constant circuit includes inductance L2, light modulation IC3, diode D12 and electrolytic capacitor EC10, Battery module circuit output terminal voltage V+It is obtained again via inductance L2, light modulation IC3 and diode D12 through electrolytic capacitor EC9 filtering Voltage VEC10;It dims and resistance R42 is connected between the output terminal of IC3 and LED light, resistance R42 both ends connect light modulation IC3's respectively ISP feet and ISN feet, voltage VEC10=VR42+VLED, LED light electric current ILED=(VISP-VISN)/R42;The DIM feet of the light modulation IC3 It is connected to resistance R39, R40, detection voltage VDIM=(V1*R40)/(R39+R40);Battery module circuit output end V+Pass through resistance R36, R37, R38, optocoupler PH1 and diode D11 are connected to the DIM feet of light modulation IC3.
A kind of control method of multifunctional emergency light supply unit, including standby mode of operation, normal operating conditions and event Hinder three working conditions of error condition;The working condition of emergency light can dim the detection voltage of the DIM feet of IC3 by control VDIMIt is controlled accordingly;When L, N-terminal input voltage be less than reference voltage, voltage VR14<During 2.5V, the VCC of comparator IC2 End output high level, optocoupler PH1 cut-offs;When L, N-terminal input voltage reach reference voltage, voltage V at this timeR14>2.5V compares The VCC ends overturning output low level of device IC2, optocoupler PH1 conductings;When L, N-terminal voltage are more than reference voltage, at this time voltage VR14> The VCC ends output low level of 2.5V, comparator IC2, when making optocoupler PH1 conductings, triode Q1 conductings;The conducting of optocoupler PH1 and Blanking voltage forms anti-erroneous judgement return difference;The reference voltage Vac=176V.
Further, when the LED light is low current working condition, the standby mode of operation is divided into two kinds of situations,
1st, L, N-terminal input voltage are in ON states less than 176V and L ends, and this state belongs to electrical network low voltage situation, lead to Setting resistance R12, R13, R14 resistance value is crossed to be divided;When input voltage is equal to 176V, voltage VR14=2.5V;When input electricity When pressure is less than 176V, voltage VR14<2.5V, optocoupler PH1 are not turned on, optocoupler PH2 conductings, triode Q2 cut-offs, by adjusting electricity The resistance ratio of resistance R39, R40 make detection voltage VDIMIt falls between 1.2V-2.4V, realizes the low current working condition of LED lamps;
2nd, L, N input voltage are in OFF state less than 176V and L ends, and this state belongs to power grid no-voltage situation, passes through Setting resistance R12, R13, R14 resistance value is divided;When input voltage is equal to 176V, VR14=2.5V;When input voltage is less than During 176V, voltage VR14<2.5V, optocoupler PH1 are not turned on, optocoupler PH2 cut-off, triode Q2 cut-off, by regulation resistance R39, The resistance ratio of R40 makes detection voltage VDIMVoltage is fallen between 1.2V-2.4V, realizes the low current working condition of LED light.
Further, when L, N-terminal input voltage are in ON states higher than 176V and L ends, this state belongs to normal work State;
When input voltage is equal to 176V, voltage VR14=2.5V;When L, N-terminal input voltage are more than 176V, voltage VR14 >2.5V, optocoupler PH1 are connected, optocoupler PH2 conductings, the base voltage Vb=0V of triode Q2, triode Q2 cut-off;Pass through adjusting Resistance R38 resistance values can make VDIMMuch larger than 2.4V, the V of IC3 is dimmedISPWith VISNBetween clamp voltage for 200mv, LED light it is defeated Go out electric current Iled=200mV/R42, so as to fulfill the high current working condition of LED light.
Further, when L, N-terminal input voltage are in OFF state higher than 176V and L ends, this state belongs to fault error State;
When input voltage is equal to 176V, voltage VR14=2.5V;When input voltage is more than 176V, voltage VR14>2.5V Optocoupler PH1 is connected, optocoupler PH2 cut-offs, ground level and the transmitting interstage voltage V of triode Q2be>0.7V, triode Q2 are connected, VDIM =0V, light modulation IC3 do not work, and LED light does not work.
Beneficial effects of the present invention make to combine emergency light and normal illumination lamp, while take into account emergency light and general The dual function of headlamp, these three working conditions of standby mode of operation, normal operating conditions and the firmware-error state of design LED light is made to realize the working condition of different electric currents, is suitable for various external environment conditions.
Description of the drawings
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the circuit module schematic diagram of the multifunctional emergency light supply unit of the present invention;
Fig. 2 is the circuit theory schematic diagram of the multifunctional emergency light supply unit of the present invention;
Fig. 3 is the V of the present inventionDIMWith VISP-VISNVoltage relationship figure.
Specific embodiment
Referring to Fig. 1, it is a kind of multifunctional emergency light supply unit as highly preferred embodiment of the present invention, including switch Power circuit, battery module circuit, control circuit and voltage increase and current constant circuit;Primary side feedback is used in the switching power circuit IC1, including current rectifying and wave filtering circuit, DC-DC conversion circuit and direct current regulation circuit, the input termination of the current rectifying and wave filtering circuit Enter alternating current, the output terminal of current rectifying and wave filtering circuit and the input terminal of DC-DC conversion circuit connect, the input of the direct current regulation circuit End is connect with the output terminal of DC-DC conversion circuit, the input terminal of the battery module circuit and the output terminal of direct current regulation circuit Connection, the direct current regulation circuit, the battery module circuit output terminal connect with the input terminal of voltage increase and current constant circuit, it is described The output terminal of voltage increase and current constant circuit is connected with LED light, after the output terminal connection divider resistance of current rectifying and wave filtering circuit with control circuit Input terminal connects, and the control circuit includes comparator IC2 and detection circuit, L, N both ends of the detection circuit connection alternating current And a reference voltage value is provided, the comparator IC2 used in the control circuit is provided after being compared to the reference voltage value One comparing voltage value, the light modulation IC3 used in the voltage increase and current constant circuit export corresponding according to the comparing voltage value to LED light Current value.
Referring to Fig. 2, the IC1 is designed using PN8360 primary side feedbacks, IC2 is LM385 comparators, and IC3 is uses JW1130 is designed, and U1 and U2 are TL431.The current rectifying and wave filtering circuit includes safe capacitance CX1, common mode inductance LF1 and electricity The EMI filter circuit and rectifier bridge BD1 of R1, R2 composition are hindered, the DC-DC conversion circuit includes IC1, diode D8 and electrolysis The filter circuit of capacitance EC6, common mode inductance LF2 and electrolytic capacitor EC7 compositions, the direct current regulation circuit include IC1, resistance R5, R6, R7 and transformer;After the alternating current L termination fuses F1, carrying out rectification by EMI filter circuit to rectifier bridge BD1 will Exchange input switchs to direct current output, then the valley fill circuit formed through electrolytic capacitor EC1, EC2 and diode D1, D2, D3 filters To High Power Factor direct current output;The AC energy of transformation is generated on IC1 control primary windings TR1 and is coupled to secondary On winding TR3, secondary windings TR3 is rectified into direct current using diode D8, by electrolytic capacitor EC6, common mode inductance LF2, electricity Steady dc voltage, diode D4, resistance R3, resistance R4 and capacitance C2 groups are obtained after the filter circuit of solution capacitance EC7 compositions Into RCD clamper absorbing circuits, the peak voltage that transformer is generated by leakage inductance is absorbed, prevents metal-oxide-semiconductor built in IC1 from puncturing;Resistance R5, R6, R7 one end connect IC1 FB feet, another termination transformer auxiliary winding TR2 of resistance R5, according to auxiliary winding TR2 and time FB feet are 2.0V reference voltage relationships inside the turn ratio and IC1 of grade winding TR3, provide secondary windings TR3 and armature winding The negative-feedback signal of TR1 so that secondary windings TR3 is to one stable voltage of battery module circuit output;Resistance R9, R10 and R11 is in parallel and connects the CS feet of IC1, for detecting peak point current.Overload protection is carried out according to the voltage value on resistance R9, when IC1 will turn off output when voltage on R9 is more than 0.5V, generate protection, prevent overload from exporting.
The control circuit includes resistance R23, one end connection zener diode U1 of resistance R23, other end connection IC2 VCC feet, resistance R23 connects the in-phase end of comparator IC2 by resistance R26, rectifier bridge BD1 anodes by divider resistance R12, R13, R14 are grounded, and the divider resistance R14 other ends are connected to the reverse side of comparator IC2 by resistance R24;VCC feet connect optocoupler PH, and resistance R18 and triode Q1 are connected, the collector of triode Q1 is connected to resistance R14 by resistance R20.
The detection circuit is terminated with capacitance C7, resistance R22 and rectifier bridge BR2 including L, N two, and obtains a low current DC voltage, by electrolytic capacitor EC5 filtering and resistance R21 current limlitings be connected to optocoupler PH2, optocoupler PH2 connecting triode Q2, The DIM feet of the collector connection light modulation IC3 of triode Q2.
The direct current regulation circuit includes resistance R32, R33, R34 and zener diode U2, battery module circuit output end Voltage V+ after resistance R32, R33, R34 and zener diode U2 by obtaining burning voltage V1, burning voltage V1=(2.5* R33)/R34。
Using 12V nickel-cadmium cells, LED light is 30V constant current outputs for battery in the battery module circuit, then need by 12V boost in voltage is 30V constant current outputs.The 8pinEN/DIM feet of the light modulation IC3 of voltage increase and current constant circuit can be used for simulation to dim, EN/DIM feet voltage is VDIM.V in battery module circuit+For fixed voltage, VbatteryFor cell voltage, then the voltage of R31 For V+-Vbattery, charging current is (V+-Vbattery)/R31.Wherein diode D9 has been buffer action, prevents battery from filling;Two Pole pipe D10 act as inputting without alternating current as AC, V+For 0V, battery is powered through D10 to LED light.The voltage increase and current constant circuit packet Include inductance L2, light modulation IC3, diode D12 and electrolytic capacitor EC10, battery module circuit output terminal voltage V+Through electrolytic capacitor EC9 filtering obtains voltage V via inductance L2, light modulation IC3 and diode D12 againEC10;Between the output terminal and the LED light that dim IC3 Resistance R42 is connected to, resistance R42 both ends connect the light modulation ISP feet of IC3 and ISN feet, voltage V respectivelyEC10=VR42+VLED, LED light Electric current ILED=(VISP-VISN)/R42;The DIM feet of the light modulation IC3 are connected to resistance R39, R40, detection voltage VDIM=(V1* R40)/(R39+R40);Battery module circuit output end V+It is connected to by resistance R36, R37, R38, optocoupler PH1 and diode D11 Dim the DIM feet of IC3.
CY1 and CY2 is safe capacitance in Fig. 2, other unaccounted resistive elements are conventional arrangement, therefore are not explained further It states.
Referring to Fig. 3, work as VDIMVoltage range dims the V of IC3 in 1.2-2.4VISP-VISNInduced voltage is 0- 200mv, and VISP-VISNWith VDIMIncrease and increase;VDIM<During 1.2V, VISP-VISNInduced voltage is 0V;VDIM>During 2.4V, VISP-VISNInduced voltage is 200mV.
The control method of the multifunctional emergency light supply unit, including standby mode of operation, normal operating conditions and failure Three working conditions of error condition;The working condition of emergency light can dim the detection voltage V of the DIM feet of IC3 by controlDIM It is controlled accordingly;When L, N-terminal input voltage be less than reference voltage, voltage VR14<During 2.5V, the VCC ends of comparator IC2 Export high level, optocoupler PH1 cut-offs;When L, N-terminal input voltage reach reference voltage, voltage V at this timeR14>2.5V, comparator The VCC ends overturning output low level of IC2, optocoupler PH1 conductings;When L, N-terminal voltage are more than reference voltage, at this time voltage VR14> The VCC ends output low level of 2.5V, comparator IC2, when making optocoupler PH1 conductings, triode Q1 conductings;The conducting of optocoupler PH1 and Blanking voltage forms anti-erroneous judgement return difference;The reference voltage Vac=176V.
When the LED light is low current working condition, the standby mode of operation is divided into two kinds of situations,
1st, L, N-terminal input voltage are in ON states less than 176V and L ends, and this state belongs to electrical network low voltage situation, lead to Setting resistance R12, R13, R14 resistance value is crossed to be divided;When input voltage is equal to 176V, voltage VR14=2.5V;When input electricity When pressure is less than 176V, voltage VR14<2.5V, optocoupler PH1 are not turned on, optocoupler PH2 conductings, triode Q2 cut-offs, by adjusting electricity The resistance ratio of resistance R39, R40 make detection voltage VDIMIt falls between 1.2V-2.4V, realizes the low current working condition of LED lamps;
2nd, L, N input voltage are in OFF state less than 176V and L ends, and this state belongs to power grid no-voltage situation, passes through Setting resistance R12, R13, R14 resistance value is divided;When input voltage is equal to 176V, VR14=2.5V;When input voltage is less than During 176V, voltage VR14<2.5V, optocoupler PH1 are not turned on, optocoupler PH2 cut-off, triode Q2 cut-off, by regulation resistance R39, The resistance ratio of R40 makes detection voltage VDIMVoltage is fallen between 1.2V-2.4V, realizes the low current working condition of LED light.
When L, N-terminal input voltage are in ON states higher than 176V and L ends, this state belongs to normal operating conditions;
When input voltage is equal to 176V, voltage VR14=2.5V;When L, N-terminal input voltage are more than 176V, voltage VR14 >2.5V, optocoupler PH1 are connected, optocoupler PH2 conductings, the base voltage Vb=0V of triode Q2, triode Q2 cut-off;Pass through adjusting Resistance R38 resistance values can make VDIMMuch larger than 2.4V, the V of IC3 is dimmedISPWith VISNBetween clamp voltage for 200mv, LED light it is defeated Go out electric current Iled=200mV/R42, so as to fulfill the high current working condition of LED light.
When L, N-terminal input voltage are in OFF state higher than 176V and L ends, this state belongs to firmware-error state;
When input voltage is equal to 176V, voltage VR14=2.5V;When input voltage is more than 176V, voltage VR14>2.5V Optocoupler PH1 is connected, optocoupler PH2 cut-offs, ground level and the transmitting interstage voltage V of triode Q2be>0.7V, triode Q2 are connected, VDIM =0V, light modulation IC3 do not work, and LED light does not work.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that present invention specific implementation is not by aforesaid way Limitation, as long as employ the inventive concept and technical scheme of the present invention progress various unsubstantialities improvement or without changing Other occasions are directly applied to by the design of the present invention and technical solution, within protection scope of the present invention.

Claims (9)

1. a kind of multifunctional emergency light supply unit, which is characterized in that including switching power circuit, battery module circuit, control Circuit and voltage increase and current constant circuit;Using primary side feedback IC1 in the switching power circuit, primary side feedback IC1 models are PN8360, It includes current rectifying and wave filtering circuit, DC-DC conversion circuit and direct current regulation circuit, the input terminal access city of the current rectifying and wave filtering circuit The input terminal of electricity, the output terminal of current rectifying and wave filtering circuit and DC-DC conversion circuit connects, the input terminal of the direct current regulation circuit with The output terminal connection of DC-DC conversion circuit, the input terminal of the battery module circuit and the output terminal of direct current regulation circuit connect, The direct current regulation circuit, the battery module circuit output terminal connect with the input terminal of voltage increase and current constant circuit, the boosting The output terminal of constant-current circuit is connected with LED light, is inputted after the output terminal connection divider resistance of current rectifying and wave filtering circuit with control circuit End connection, the control circuit include comparator IC2 and detection circuit, and L, N both ends of the detection circuit connection alternating current simultaneously carry For a reference voltage value, the comparator IC2 that is used in the control circuit to L, N both ends input voltage and the reference voltage value into A comparing voltage value is provided after row, and the light modulation IC3 used in the voltage increase and current constant circuit is according to the comparing voltage value to LED Lamp exports corresponding current value, and the current rectifying and wave filtering circuit includes safe capacitance CX1, common mode inductance LF1 and resistance R1, R2 are formed EMI filter circuit and rectifier bridge BD1, the DC-DC conversion circuit include IC1, diode D8 and electrolytic capacitor EC6, altogether The filter circuit of mould inductance LF2 and electrolytic capacitor EC7 compositions, the direct current regulation circuit include IC1, resistance R5, R6, R7 and change Depressor;After the alternating current L termination fuses F1, carry out rectification by EMI filter circuit to rectifier bridge BD1 and switch to input is exchanged Direct current output, then the valley fill circuit formed through electrolytic capacitor EC1, EC2 and diode D1, D2, D3 filter to obtain High Power Factor Direct current output;The AC energy of transformation is generated on IC1 control primary windings TR1 and is coupled on secondary windings TR3, it is secondary Grade winding TR3 is rectified into direct current using diode D8, is formed by electrolytic capacitor EC6, common mode inductance LF2, electrolytic capacitor EC7 Filter circuit after obtain steady dc voltage, diode D4, resistance R3, resistance R4 and capacitance C2 composition RCD clampers absorb Circuit carries out clamper to the high-voltage MOSFET pin 6 of IC1;Resistance R5, R6, R7 one end connects the FB feet of IC1, and resistance R5's is another One terminates transformer auxiliary winding TR2, is according to FB feet inside the turn ratio and IC1 of auxiliary winding TR2 and secondary windings TR3 2.0V reference voltage relationships provide the negative-feedback signal of secondary windings TR3 and armature winding TR1 so that secondary windings TR3 to One stable voltage of battery module circuit output;The CS heels of resistance R9 connections IC1 were carried out according to the voltage value on resistance R9 Carry protection, R6, R7, R9 other end ground connection.
2. multifunctional emergency light supply unit according to claim 1, which is characterized in that the control circuit includes resistance One end connection zener diode U1 of R23, resistance R23, the other end connect the VCC feet of IC2, and resistance R23 passes through resistance R26 The in-phase end of comparator IC2 is connect, rectifier bridge BD1 anodes are grounded by divider resistance R12, R13, R14, and divider resistance R14 is another End is connected to the reverse side of comparator IC2 by resistance R24;VCC feet connect optocoupler PH1, and connect resistance R18 and triode Q1, The collector of triode Q1 is connected to the other end of resistance R14 by resistance R20.
3. multifunctional emergency light supply unit according to claim 1, which is characterized in that the detection circuit includes L, N Two are terminated with capacitance C7, resistance R22 and rectifier bridge BR2, and obtain the DC voltage of a low current, pass through electrolytic capacitor EC5 Filtering and resistance R21 current limlitings are connected to optocoupler PH2, the collector connection light modulation IC3 of optocoupler PH2 connecting triode Q2, triode Q2 DIM feet.
4. multifunctional emergency light supply unit according to claim 1, which is characterized in that the direct current regulation circuit includes Resistance R32, R33, R34 and zener diode U2, battery module circuit output terminal voltage V+By resistance R32, R33, R34 and surely Burning voltage V is obtained after pressure diode U21, burning voltage V1=(2.5*R33)/R34.
5. multifunctional emergency light supply unit according to claim 4, which is characterized in that the voltage increase and current constant circuit includes Inductance L2, light modulation IC3, diode D12 and electrolytic capacitor EC10, battery module circuit output terminal voltage V+Through electrolytic capacitor EC9 Filtering obtains voltage V via inductance L2, light modulation IC3 and diode D12 againEC10;Output terminal and the LED light for dimming IC3 are indirectly There is resistance R42, resistance R42 both ends connect the light modulation ISP feet of IC3 and ISN feet, voltage V respectivelyEC10=VR42+VLED, LED light electricity Flow ILED=(VISP-VISN)/R42;The DIM feet of the light modulation IC3 are connected to resistance R39, R40, detection voltage VDIM=(V1*R40)/ (R39+R40);Battery module circuit output end V+Light modulation is connected to by resistance R36, R37, R38, optocoupler PH1 and diode D11 The DIM feet of IC3, inductance L2 one end and diode D12 anodes, polarity free capacitor C9 one end, dim IC3 SW feet connected by conducting wire It connects, the inductance L2 other ends are connected with electrolytic capacitor EC9 anodes by conducting wire, the VIN feet of diode D12 cathode and light modulation IC3, nothing Polar capacitor C10 one end is connected by conducting wire, the photoelectricity three inside resistance R36 one end and electrolytic capacitor EC8 anodes, optocoupler PH1 Pole pipe collector is connected by conducting wire, and the phototriode emitter, diode D11 inside resistance R37 one end and optocoupler PH1 are just Pole is connected by conducting wire, and diode D11 cathode are connected with resistance R38 one end by conducting wire.
6. the control method of multifunctional emergency light supply unit according to claim 2, which is characterized in that including work of meeting an urgent need Make three working conditions of state, normal operating conditions and firmware-error state;The working condition of emergency light can be adjusted by controlling The detection voltage V of the DIM feet of light IC3DIMIt is controlled accordingly;When L, N-terminal input voltage be less than reference voltage, voltage VR14 <During 2.5V, the VCC ends output high level of comparator IC2, optocoupler PH1 cut-offs;When L, N-terminal input voltage reach reference voltage, Voltage V at this timeR14>The VCC ends overturning output low level of 2.5V, comparator IC2, optocoupler PH1 conductings;When L, N-terminal voltage are more than base Quasi- voltage, at this time voltage VR14>The VCC ends output low level of 2.5V, comparator IC2, when making optocoupler PH1 conductings, triode Q1 is led It is logical;The on and off voltage of optocoupler PH1 forms anti-erroneous judgement return difference;The reference voltage Vac=176V.
7. the control method of multifunctional emergency light supply unit according to claim 6, which is characterized in that the LED light During for low current working condition, the standby mode of operation is divided into two kinds of situations,
1st, L, N-terminal input voltage are in ON states less than 176V and L ends, and this state belongs to electrical network low voltage situation, by setting Resistance R12, R13, R14 resistance value is put to be divided;When input voltage is equal to 176V, voltage VR14=2.5V;When input voltage is small When 176V, voltage VR14<2.5V, optocoupler PH1 are not turned on, optocoupler PH2 conducting, triode Q2 cut-off, by regulation resistance R39, The resistance ratio of R40 makes detection voltage VDIMIt falls between 1.2V-2.4V, realizes the low current working condition of LED light;
2nd, L, N input voltage are in OFF state less than 176V and L ends, and this state belongs to power grid no-voltage situation, passes through setting Resistance R12, R13, R14 resistance value is divided;When input voltage is equal to 176V, VR14=2.5V;When input voltage is less than 176V When, voltage VR14<2.5V, optocoupler PH1 are not turned on, optocoupler PH2 cut-offs, and triode Q2 cut-offs pass through regulation resistance R39, R40 Resistance ratio makes detection voltage VDIMVoltage is fallen between 1.2V-2.4V, realizes the low current working condition of LED light.
8. the control method of multifunctional emergency light supply unit according to claim 6, which is characterized in that when L, N-terminal are defeated Enter voltage and be in ON states higher than 176V and L ends, this state belongs to normal operating conditions;
When input voltage is equal to 176V, voltage VR14=2.5V;When L, N-terminal input voltage are more than 176V, voltage VR14> 2.5V, optocoupler PH1 are connected, optocoupler PH2 conductings, the base voltage Vb=0V of triode Q2, triode Q2 cut-off;By adjusting electricity Resistance R38 resistance values can make VDIMMore than 2.4V, the V of IC3 is dimmedISPWith VISNBetween clamp voltage for 200mv, the output current of LED light Iled=200mV/R42, so as to fulfill the high current working condition of LED light.
9. the control method of multifunctional emergency light supply unit according to claim 7, which is characterized in that when L, N-terminal are defeated Enter voltage and be in OFF state higher than 176V and L ends, this state belongs to firmware-error state;
When input voltage is equal to 176V, voltage VR14=2.5V;When input voltage is more than 176V, voltage VR14>2.5V, optocoupler PH1 is connected, optocoupler PH2 cut-offs, ground level and the transmitting interstage voltage V of triode Q2be>0.7V, triode Q2 are connected, VDIM=0V, Light modulation IC3 does not work, and LED light does not work.
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