CN203734876U - LED emergency lamp - Google Patents
LED emergency lamp Download PDFInfo
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- CN203734876U CN203734876U CN201320727929.5U CN201320727929U CN203734876U CN 203734876 U CN203734876 U CN 203734876U CN 201320727929 U CN201320727929 U CN 201320727929U CN 203734876 U CN203734876 U CN 203734876U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The utility model relates to the field of floodlights, and provides an LED emergency lamp, compared with the prior art, the LED emergency lamp provided by the utility model has a simple structure, when the LED emergency lamp is used, only a traditional fluorescent lamp is replaced, and the original fluorescent lamp circuit is not changed, thereby bringing convenience to installation and maintenance, effectively reducing the integral cost, being strong in practicability, convenient to use, mature in manufacturing process and easy to implement, a controller is used for controlling the voltage of a sampling circuit to control the brightness of the LED emergency lamp, to save the battery capacity and prolong the use time, and meanwhile, the dump energy of the battery is roughly recognized according to the brightness of the LED emergency lamp.
Description
Technical field
The utility model relates to illuminating lamp field, relates in particular to a kind of LED emergency light.
Background technology
Emergency lighting is as a pith of technical grade civil buildings lighting installation, closely related with personal safety and building, device security, along with fast increasing economy, energy supply and demand contradiction is outstanding day by day, supply of electric power comes into existence and verifies short situation, the energy-conservation eager problem solving at present that becomes.Because LED has the advantages such as efficient, energy-conservation, life-span length, environmental protection, therefore novel LED emergency lighting becomes following development trend.Fluorescent lamp is extended familys in light fixture, is widely used in the places such as factory's streamline, market, supermarket, school, office space, hospital, parking lot, so use LED fluorescent lamp to have great importance as emergency lighting.
Current LED Emergency daylight lamp all uses primary and secondary power supply, main power source is that normal lighting power supply, secondary source are reserve battery driving power, and by two groups of switch controls, one group of switch control normal lighting state, other one group of switch control emergency lighting state, need to change wiring circuit when having used two groups of switches to cause changing.
Utility model content
The utility model provides a kind of LED emergency light, is intended to solve the problem that need to change wiring circuit when existing LED emergency light needs replacing that two groups of switch controls cause.
In order to solve the problems of the technologies described above, the utility model is achieved in that
A kind of LED emergency light of the utility model embodiment, comprising:
Switching Power Supply, charge-discharge circuit, battery, current converter circuit, voltage acquisition unit and controller;
The input of described Switching Power Supply is connected with AC power, and alternating current is converted to direct current output;
The input of described charge-discharge circuit is connected with the output of described Switching Power Supply, the control end of described charge-discharge circuit is connected with the output of described controller, the output of described charge-discharge circuit is connected with the input of described battery, for giving described battery charging;
The output of described battery is connected with the input of described current converter circuit, while stopping output current for described Switching Power Supply for described current converter circuit provides electric current;
The input of described current converter circuit is connected with the output of the output of described Switching Power Supply and described battery, for being that constant current is powered to LED lamp by the current conversion of described Switching Power Supply or described battery output;
The input of described voltage acquisition unit is connected with the output of the output of described Switching Power Supply, described battery, the output of described voltage acquisition unit is connected with the input of described controller, for gathering the voltage of described Switching Power Supply and the output of described battery and sending to described controller;
The output of described controller is connected with the control end of the control end of described charge-discharge circuit and described current converter circuit, charges the battery to described current converter circuit according to the voltage signal output control signal of the described Switching Power Supply of described voltage collection circuit collection and the output of described battery to adjust the brightness of described LED lamp and to control described charge-discharge circuit.
Described LED emergency light also comprises: the 11 diode and the 12 diode, the output of Switching Power Supply described in the anodic bonding of described the 11 diode, negative electrode connects the input of described current converter circuit, the output of battery described in the anodic bonding of described the 12 diode, negative electrode connects the input of described current converter circuit.
Described voltage collection circuit comprises: the 21 resistance and the 22 resistance, the first end of described the 21 resistance connects the output of described Switching Power Supply and the output of described battery, the second end of described the 21 resistance connects described the 22 first end of resistance and the input of described controller, the second end ground connection of described the 22 resistance.
Described LED emergency light also comprises the first switch, and described the first switch is between described AC power and described Switching Power Supply.
Described LED emergency light also comprises: be connected the prompt facility of prompting powered battery state with the output of described controller.
Described prompt facility comprises the first indicator light and the second indicator light, the output of the anodic bonding controller of described the first indicator light, minus earth, the output of the anodic bonding controller of described the second indicator light, minus earth.
Described charge-discharge circuit comprises the first control chip, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the first diode, the second diode, the 3rd light-emitting diode, the 4th light-emitting diode and the first field effect transistor, the first pin of described the first control chip connects the first end of described the 5th electric capacity, the second end of described the 5th electric capacity connects described Switching Power Supply output, the first end of the first electric capacity, the 15 pin of described the first control chip and the source electrode of the first field effect transistor, the second end ground connection of described the first electric capacity, the grid of described the first field effect transistor connects the 16 pin of described the first control chip, the drain electrode of described the first field effect transistor connects the anode of the first diode, the negative electrode of described the first diode connects the first end of the second diode cathode and the first inductance, the plus earth of described the second diode, the 13 pin of the first control chip and the first end of described the 6th resistance described in the second termination of described the first inductance, the 14 pin of the first control chip and the 6th first end of electric capacity and the anode of described battery described in the second termination of described the 6th resistance, the second end of described the 6th electric capacity and the minus earth of battery, the 15 pin of described the first control chip connects the first end of the first resistance and the 5th resistance, the second end of described the first resistance connects the anode of the 3rd light-emitting diode, the negative electrode of described the 3rd light-emitting diode connects the 5th pin of described the first control chip, the first control end that described the 5th pin is described charge-discharge circuit, the anode of the second termination the 4th light-emitting diode of described the 5th resistance, the negative electrode of described the 4th light-emitting diode connects the 4th pin of described the first control chip, the control end that described the 4th pin is described charge-discharge circuit, the 6th pin of described the first control chip connects the first end of described the second resistance, the 7th pin of described the first control chip connects the first end of described the 3rd resistance, the 8th pin of described the first control chip connects the first end of described the 3rd electric capacity, the 9th pin of described the first control chip connects the first end of the 4th resistance, the first end of the 4th electric capacity described in the second termination of described the 4th resistance, the 11 pin of described the first control chip connects the first end of described the second electric capacity, the second end of described the second resistance, the second end of described the 3rd resistance, the second pin of described the first control chip, the 3rd pin of the first control chip, the second end of described the second electric capacity, the second end of described the 3rd electric capacity, the second end of described the 4th electric capacity, the tenth pin of described the first control chip connects equipotential ground.
Described current converter circuit is DC/DC constant-current source.
Described DC/DC constant-current source comprises: the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, the 5th diode, the 6th diode, the 7th diode, the 8th diode, the 9th diode, the 11 electric capacity, the 12 electric capacity, the 13 electric capacity, the 14 electric capacity, the 15 electric capacity, the second inductance and the second field effect transistor;
The first pin of the second control chip connects the second pin, the first end of the 11 resistance, the 9th negative electrode of diode and the first end of the 12 electric capacity, described the second pin is the control end of DC/DC constant-current source, the second end of described the 11 resistance is the input of described DC/DC constant-current source, and connect the first end of the 11 electric capacity and the first end of the second inductance, the anode of the second termination the 5th diode of described the second inductance and the drain electrode of the second field effect transistor, the grid of described the second field effect transistor connects the 8th pin of the second control chip, the source electrode of described the second field effect transistor connects the first end of the 14 resistance and the 7th pin of the second control chip, the negative electrode of described the 5th diode connects the negative electrode of described the 6th diode, described the 7th anode of diode and the first end of the 15 electric capacity, the negative electrode of described the 7th diode connects the anode of described the 8th diode, the negative electrode of described the 8th diode connects the 13 first end of resistance and the first end of the 15 resistance, the anode of the second termination the 6th diode of described the 13 resistance and the 6th pin of described the second control chip, the 3rd pin of described the second control chip connects the first end of the 13 electric capacity, the 5th pin of described the second control chip connects the first end of the 12 resistance, the first end of the 14 electric capacity described in the second termination of described the 12 resistance, the second end of described the 11 electric capacity, the anode of the 9th diode, the second end of the 12 electric capacity, the second end of the 13 electric capacity, the 4th pin of the second control chip, the second end of the 14 electric capacity, the second end of the 14 resistance, the second termination equipotential ground of the second end of the 15 resistance and the 15 electric capacity.
Described controller comprises the 3rd control chip, the 36 resistance, the 37 resistance, the 38 resistance, the 39 resistance, the 40 resistance, the 27 electric capacity, the 28 electric capacity, the 29 electric capacity and the 5th triode, the first pin of described the 3rd control chip connects the first end of the 36 resistance, the second end ground connection of described the 36 resistance, the 3rd pin of described the 3rd control chip connects the 37 first end of resistance and the first end of the 27 electric capacity, the second termination high level of described the 37 resistance and the second end ground connection of described the 27 electric capacity, the 5th pin of described the 3rd control chip connects the first end of the 28 electric capacity, the 7th pin of the 3rd control chip and the first end of the 39 resistance described in the second termination of described the 28 electric capacity, the 8th pin of the 3rd control chip described in the second termination of described the 39 resistance, the 9th pin of described the 3rd control chip connects the collector electrode of the 5th triode, the base stage of described the 5th triode connects the 38 first end of resistance and the first end of the 40 resistance, the second termination high level of described the 38 resistance, the emitter equipotential ground of the second end of described the 40 resistance and described the 5th triode, the 16 pin of described the 3rd control chip connects the first end of the 29 electric capacity, the second end ground connection of described the 29 electric capacity, the the 11 and the 12 pin of described the 3rd control chip connects the control end of described charge-discharge circuit, the 13 pin of described the 3rd control chip connects the control end of described current converter circuit.
Compared with the existing technology simple in structure at the utility model LED emergency light, use this LED emergency light, only need to replace traditional fluorescent lamp, do not need to change original fluorescent lamp circuit, give to install and keep in repair and offer convenience, effectively reduce holistic cost, practicality is stronger, easy to use, there is ripe manufacturing process, be easy to realize, and use controller to carry out sampling circuit voltage control LED emergency light brightness, save battery electric quantity, extended service time, roughly identified the dump energy of battery simultaneously according to LED emergency light brightness.
Brief description of the drawings
Fig. 1 is the embodiment schematic diagram of the LED emergency light that provides of the utility model embodiment;
Fig. 2 is another embodiment schematic diagram of the LED emergency light that provides of the utility model embodiment;
Fig. 3 is the charge-discharge circuit circuit structure diagram in the LED emergency light that provides of the utility model embodiment;
Fig. 4 is the charge-discharge circuit charging process schematic diagram in the LED emergency light that provides of the utility model embodiment;
Fig. 5 is the current converter circuit circuit structure diagram in the LED emergency light that provides of the utility model embodiment;
Fig. 6 is the controller circuit structure figure in the LED emergency light that provides of the utility model embodiment;
Fig. 7 is the LED emergency light control flow chart that the utility model embodiment provides.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Below in conjunction with specific embodiment, specific implementation of the present utility model is described in detail:
The embodiment that a kind of LED emergency light is provided as the utility model embodiment, refers to Fig. 1,
A kind of LED emergency light, comprising: Switching Power Supply 201, charge-discharge circuit 207, battery 203, current converter circuit 202, voltage acquisition unit 205 and controller 206;
The input of described Switching Power Supply 201 is connected with AC power, and alternating current is converted to direct current output;
The input of described charge-discharge circuit 207 is connected with the output of described Switching Power Supply 201, the control end of described charge-discharge circuit 207 is connected with the output of described controller 206, the output of described charge-discharge circuit 207 is connected with the input of described battery 203, for charging to described battery 203;
The output of described battery 203 is connected with the input of described current converter circuit 202, while stopping output current for described Switching Power Supply 201 for described current converter circuit 202 provides electric current;
The input of described current converter circuit 202 is connected with the output of described Switching Power Supply 201 and the output of described battery 203, is that constant current is powered to LED lamp 208 for the current conversion that described Switching Power Supply 201 or battery 203 are exported;
The input of described voltage acquisition unit 205 is connected with the output of described Switching Power Supply 201, the output of described battery 203, the output of described voltage acquisition unit 205 is connected with the input of described controller 206, for gathering the voltage that described Switching Power Supply 201 and described battery 203 export and sending to described controller 206;
The output of described controller 206 is connected with the control end of described charge-discharge circuit 207 and the control end of described current converter circuit 202, and the voltage signal output control signal that the described Switching Power Supply 201 gathering according to described voltage collection circuit 205 and described battery 203 are exported charges the battery to described current converter circuit 202 to adjust the brightness of described LED lamp 208 and to control described charge-discharge circuit 207.
Described Switching Power Supply 201 is connected with alternating current by one group of switch, alternating current is converted to direct current and exports to current converter circuit 202 and charge-discharge circuit 207 from output, described current converter circuit 202 for DC to DC converter be LED lamp power supply, described charge-discharge circuit 207 is that battery 203 charges under the control of controller 206 in the time that battery is not full of, described battery 203 is connected with switch power parallel, in the time that Switching Power Supply stops output current, output current is to current converter circuit, described voltage collection circuit 205 can adopt divider resistance to gather voltage, the magnitude of voltage that gathers battery output for gathering when voltage that Switching Power Supply 201 exports and Switching Power Supply 201 stop exporting sends to controller 206, described controller 206 according to gather voltage signal export different duty cycle control signals give described current converter circuit 202 to adjust the brightness of described LED lamp 208.
Compared with the existing technology simple in structure at the utility model LED emergency light, use this LED emergency light, only need to replace traditional fluorescent lamp, do not need to change original fluorescent lamp circuit, give to install and keep in repair and offer convenience, effectively reduce holistic cost, practicality is stronger, easy to use, there is ripe manufacturing process, be easy to realize, and use controller to carry out sampling circuit voltage control LED emergency light brightness, save battery electric quantity, extended service time, roughly identified the dump energy of battery simultaneously according to LED emergency light brightness.
Another embodiment of a kind of LED emergency light is provided as the utility model embodiment, refer to Fig. 2, described LED emergency light also comprises: the 11 diode D11 and the 12 diode D12, the output of Switching Power Supply 201 described in the anodic bonding of described the 11 diode D11, negative electrode connects the input of described current converter circuit 202, the output of battery 203 described in the anodic bonding of described the 12 diode D12, negative electrode connects the input of described current converter circuit 202.
When described the 11 diode D11 is used for preventing battery 203 output voltage, flows backwards and enter Switching Power Supply 201, when described the 12 diode D12 is used for preventing Switching Power Supply 201 output voltage, flows backwards and enter battery 203.
Described voltage collection circuit 205 comprises: the 21 resistance R the 21 and the 22 resistance R 22, the first end of described the 21 resistance R 21 connects the output of described Switching Power Supply 201 and the output of described battery 203, the second end of described the 21 resistance R 21 connects the first end of described the 22 resistance R 22 and the input of described controller 206, the second end ground connection of described the 22 resistance R 22.
Described LED emergency light also comprises: be connected the prompt facility 204 of prompting powered battery state with the output of described controller.
Described prompt facility 204 comprises the first indicator light and the second indicator light, the output of the anodic bonding controller of described the first indicator light, minus earth, the output of the anodic bonding controller of described the second indicator light, minus earth.
Preferably, described the first indicator light is green indicating lamp, and for send prompting in the time that battery is full of electricity, described the second indicator light is red led, for send prompting in the time that battery is not full of.
Preferably, described current converter circuit 202 is DC/DC constant-current source.
Described LED emergency light also comprises the first K switch 1, and described the first K switch 1 is between described AC power and described Switching Power Supply 201.
In the time of artificial closing switch K1 or power-off suddenly, LED emergency light provides electric energy to drive DC/DC voltage increase and current constant module to carry out work by battery, and the magnitude of voltage that controller gathers is identical, so cannot judge, after control switch for fluorescent lamp is closed, light fixture is normally worked.For energy savings, in the time that civil power is normal, if think to close completely LED fluorescent lamp, this programme adopts in certain hour and by voltage acquisition unit, voltage is sampled, after K switch 1 disconnection, the magnitude of voltage that voltage acquisition unit gathers declines, if switch is again closed, the magnitude of voltage that voltage acquisition unit gathers rises, there is variation in magnitude of voltage, therefore for fear of occurring erroneous judgement, carry out within a certain period of time continuous sampling by controller, during if there is this waveform of high voltage-low-voltage-high voltage-low-voltage, directly think and close LED emergency light completely.
Another embodiment of a kind of LED emergency light is provided as the utility model embodiment, refer to Fig. 3, described charge-discharge circuit comprises the first control chip U1, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5, the 6th capacitor C 6, the first diode D1, the second diode D2, the 3rd light-emitting diode D3, the 4th light-emitting diode D4 and the first field effect transistor M1, the first pin of described the first control chip U1 connects the first end of described the 5th capacitor C 5, the second end of described the 5th capacitor C 5 connects the output of described Switching Power Supply 201, the first end of the first capacitor C 1, the 15 pin of described the first control chip U1 and the source electrode of the first field effect transistor M1, the second end ground connection of described the first capacitor C 1, the grid of described the first field effect transistor M1 connects the 16 pin of described the first control chip U1, the drain electrode of described the first field effect transistor M1 connects the anode of the first diode D1, the negative electrode of described the first diode D1 connects the negative electrode of the second diode D2 and the first end of the first inductance L 1, the plus earth of described the second diode D2, the 13 pin of the first control chip U1 and the first end of described the 6th resistance R 6 described in the second termination of described the first inductance L 1, the 14 pin of the first control chip U1 and the first end of the 6th capacitor C 6 and the anode of described battery 203 described in the second termination of described the 6th resistance R 6, the second end of described the 6th capacitor C 6 and the minus earth of battery 203, the 15 pin of described the first control chip U1 connects the first end of the first resistance R 1 and the 5th resistance R 5, the second end of described the first resistance R 1 connects the anode of the 3rd light-emitting diode D3, the negative electrode of described the 3rd light-emitting diode D3 connects the 5th pin of described the first control chip U1, the first control end that described the 5th pin is described charge-discharge circuit, the anode of the second termination the 4th light-emitting diode D4 of described the 5th resistance R 5, the negative electrode of described the 4th light-emitting diode D4 connects the 4th pin of described the first control chip U1, the control end that described the 4th pin is described charge-discharge circuit, the 6th pin of described the first control chip U1 connects the first end of described the second resistance R 2, the 7th pin of described the first control chip U1 connects the first end of described the 3rd resistance R 3, the 8th pin of described the first control chip U1 connects the first end of described the 3rd capacitor C 3, the 9th pin of described the first control chip U1 connects the first end of the 4th resistance R 4, the first end of the 4th capacitor C 4 described in the second termination of described the 4th resistance R 4, the 11 pin of described the first control chip U1 connects the first end of described the second capacitor C 2, the second end of described the second resistance R 2, the second end of described the 3rd resistance R 3, the second pin of described the first control chip U1, the 3rd pin of the first control chip U1, the second end of described the second capacitor C 2, the second end of described the 3rd capacitor C 3, the second end of described the 4th capacitor C 4, the tenth pin of described the first control chip U1 connects equipotential ground.
The reserve battery of this programme uses lithium battery, and charge-discharge circuit is PWM voltage-dropping type lithium cell charging Managed Solution, has constant-current constant-voltage charging pattern.When VCC pin voltage is greater than low pressure latch threshold value, and while being greater than cell voltage, charger is normally worked, and battery is charged.When cell voltage is during lower than 8.4V, charger enters trickle charge pattern automatically, and now charging current is 15% of set constant current charge electric current.When cell voltage is greater than 8.4V, charger enters constant current charging mode, and now charging current arranges decision by inner 200mV reference voltage and a non-essential resistance R6, and charging current is 200mV/R6.In the time that cell voltage continuation rising approaches constant voltage charge voltage, charger enters constant voltage charge pattern, and charging current reduces gradually.In the time that charging current is reduced to EOC pin resistance settings, charging finishes, DRV pin output high level.The transistor of open-drain output pin inside turn-offs, and is output as high-impedance state; The transistor of another open-drain output pin inside is connected, and output low level, to indicate charging done state.After charging finishes, if input power and battery are still connected on charger, due to the reason of self-discharge of battery or load, cell voltage declines gradually, in the time that cell voltage reduces to 12V, by starting new charge cycle, can ensure that like this plumpness of battery is more than 80%.
Described DC/DC constant-current source comprises: the 11 resistance R the 11, the 12 resistance R the 12, the 13 resistance R the 13, the 14 resistance R the 14, the 15 resistance R 15, the 5th diode D5, the 6th diode D6, the 7th diode D7, the 8th diode D8, the 9th diode D9, the 11 capacitor C the 11, the 12 capacitor C the 12, the 13 capacitor C the 13, the 14 capacitor C the 14, the 15 capacitor C 15, the second inductance L 2 and the second field effect transistor M2;
The first pin of the second control chip U2 connects the second pin, the first end of the 11 resistance R 11, the 9th negative electrode of diode D9 and the first end of the 12 capacitor C 12, described the second pin is the control end of DC/DC constant-current source, the second end of described the 11 resistance R 11 is the input of DC/DC constant-current source, and connect the first end of the 11 capacitor C 11 and the first end of the second inductance L 2 described in connecting, the anode of the second termination the 5th diode D5 of described the second inductance L 2 and the drain electrode of the second field effect transistor M2, the grid of described the second field effect transistor M2 connects the 8th pin of the second control chip U2, the source electrode of described the second field effect transistor U2 connects the first end of the 14 resistance R 14 and the 7th pin of the second control chip U2, the negative electrode of described the 5th diode D5 connects the negative electrode of described the 6th diode D6, described the 7th anode of diode D7 and the first end of the 15 capacitor C 15, the negative electrode of described the 7th diode D7 connects the anode of described the 8th diode D8, the negative electrode of described the 8th diode D8 connects the 13 first end of resistance R 13 and the first end of the 15 resistance R 15, the anode of the second termination the 6th diode D6 of described the 13 resistance R 13 and the 6th pin of described the second control chip U2, the 3rd pin of described the second control chip U2 connects the first end of the 13 capacitor C 13, the 5th pin of described the second control chip U2 connects the first end of the 12 resistance R 12, the first end of the 14 capacitor C 14 described in the second termination of described the 12 resistance R 12, the second end of described the 11 capacitor C 11, the anode of the 9th diode D9, the second end of the 12 capacitor C 12, the second end of the 13 capacitor C 13, the 4th pin of the second control chip U2, the second end of the 14 capacitor C 14, the second end of the 14 resistance R 14, the second termination equipotential ground of the second end of the 15 resistance R 15 and the 15 capacitor C 15.
Voltage increase and current constant module adopts the constant current of booster type high-power LED lamp to drive and controls, and by the Peak Current Mode control mode of fixing turn-off time, can be set the turn-off time by capacitor C 13 is set, and then by the turn-off time, system works frequency is set.The output current of module arranges by being connected to R15 resistance: ILED=0.25/RFB.The present embodiment scheme efficiency is high, constant current high conformity, and wide input voltage range, operating frequency is high, has the function such as under voltage protection and open-circuit-protection simultaneously.The present embodiment is realized light modulation by adding pwm control signal at EN pin, and described pwm signal is produced by controller.The pwm signal that described controller sends can be controlled by the electric current of LED lamp and change to maximum current state from 0.
Described controller comprises the 3rd control chip U3, the 36 resistance R 36, the 37 resistance R 37, the 38 resistance R 38, the 39 resistance R 39, the 40 resistance R 40, the 27 capacitor C 27, the 28 capacitor C 28, the 29 capacitor C 29 and the 5th triode D5, the first pin of described the 3rd control chip U3 connects the first end of the 36 resistance R 36, the second end ground connection of described the 36 resistance R 36, the 3rd pin of described the 3rd control chip U3 connects the 37 first end of resistance R 37 and the first end of the 27 capacitor C 27, the second termination high level of described the 37 resistance R 37 and the second end ground connection of described the 27 capacitor C 27, the 5th pin of described the 3rd control chip U3 connects the first end of the 28 capacitor C 28, the 7th pin of the 3rd control chip U3 and the first end of the 39 resistance R 39 described in the second termination of described the 28 capacitor C 28, the 8th pin of the 3rd control chip U3 described in the second termination of described the 39 resistance R 39, the 9th pin of described the 3rd control chip U3 connects the collector electrode of the 5th triode D5, the base stage of described the 5th triode D5 connects the 38 first end of resistance R 38 and the first end of the 40 resistance R 40, the second termination high level of described the 38 resistance R 38, the emitter equipotential ground of the second end of described the 40 resistance R 40 and described the 5th triode D5, the 16 pin of described the 3rd control chip U3 connects the first end of the 29 capacitor C 29, the second end ground connection of described the 29 capacitor C 29, the the 11 and the 12 pin of described the 3rd control chip connects the 4th pin and the 5th pin of described charge-discharge circuit, the 13 pin of described the 3rd control chip connects the second pin of described current converter circuit, the 14 pin and the 15 pin of described the 3rd control chip connect green indicating lamp and red led.
Described controller, for realizing detection and the control of circuit, adopts 16 MCU chips, has high function command to have again high efficiency instruction, and has the address space of 1M byte and the ability of carrying out at a high speed instruction.The 1st pin of described the 3rd control chip U3 provides PWM square-wave signal to carry out electric current adjusting to voltage increase and current constant module, realizes day-light lamp under different conditions and has different brightness; The 3rd pin provides the reset function of MCU; 5th, 7,8 pins are power supply, MODE circuit; The 9th pin reality MCU arousal function, in the time that civil power is normal, the 5th diode Q5 conducting, drags down the 9th pin, thus reality MCU wake up.The 11st pin detects charging module master chip the 5th pin voltage, judges whether to have charged.The 12nd pin detects charging module master chip the 4th pin voltage, judges whether to charge.The 13rd pin is controlled at MCU while exporting 0% duty ratio square wave, cuts off voltage increase and current constant module loop, overall power consumption is dropped to minimum.14th, 15 pins connect LED light, the state of cue circuit work.The reference voltage input that the 16th pin is A/D converter.The 18th pin is line voltage detecting pin, processes through MCU, makes different control modes.
Specifically describe the course of work of the utility model embodiment below, refer to Fig. 7, controller 206 is by gathering the output voltage of electrical resistance collection Switching Power Supply 201 and battery 203, in the time that the output voltage of controller collection is greater than 24 volts, export 100% duty ratio square wave to current converter circuit 302 driving LED lamps, detect battery simultaneously and whether be full of, make green light Chang Liang if battery has been full of, make red light Chang Liang if battery is not full of; In the time that the output voltage of controller collection is 10.5V<Va<18V, the duty ratio square wave of controller output 30% is to current converter circuit 302, because the duty ratio size of the pwm signal of the EN pin input of current converter circuit 302 is directly proportional to output current, therefore LED lamp sends 30% brightness, and green indicating lamp sends flicker; In the time that the output voltage of controller collection is 9.5V<Va<10.5V, the duty ratio square wave of controller output 10% is to the EN light modulation pin of current converter circuit 302, make LED lamp send 10% brightness, red led sends flicker simultaneously; In the time that the output voltage of controller collection is Va<8.5V, the duty ratio square wave of controller output 10% is to the EN light modulation pin of current converter circuit 302, makes LED lamp send 10% brightness, and red led sends flicker simultaneously.LED lamp sent 10 flickers within one minute previous section time simultaneously, maintained 10 minutes always, last, and the duty ratio of MCU output 0%, to voltage increase and current constant module EN light modulation pin, extinguishes fluorescent lamp completely.
In addition, for accurate judgement has a power failure suddenly or artificially turn-offs, this programme by the output voltage of Switching Power Supply after resistance carries out dividing potential drop, by the controller contrast of sampling.
For example: switch power source output voltage VDC=25V, the first diode voltage VD=1V, voltage Vbattery=12V when battery is full of;
When the voltage that does not have power-off Time Controller collection point is: Va=VDC-VD=25-1V=24V;
Controller sampled voltage is: Vb=(R1/R1+R2) * Va=(R1/R1+R2) * 24V
When after power-off, electric routing battery provides electric energy.
The voltage of controller collection point is: Va1=Vbattery-VD=11V
Controller sampled voltage is: Vb1=(R1/R1+R2) * Va=(R1/R1+R2) * 11V
Due to no matter be artificial closing switch K1 or suddenly power-off, the voltage of collection point be all Va1=11V, and the voltage that controller is sampled is Vb1=(R1/R1+R2) * 11V.So cannot judge, LED lamp provides electric energy drive current change-over circuit to carry out work by battery.If after therefore control switch for fluorescent lamp is closed, light fixture is normally worked.The utility model embodiment is for energy savings, in the time that civil power is normal, if think to close completely LED fluorescent lamp, this programme adopts in 3S collection point voltage is sampled, due to after K switch 1 closes, collection point voltage drops to 11V from 24V, if switch is again closed, collection point voltage is raised to 24V from 11V, therefore there is variation in collection point voltage, again due to (Vb/Vb1) >2, simultaneously for fear of occurring erroneous judgement, continuous sampling is carried out in controller control, during if there is this waveform of high voltage-low-voltage-high voltage-low-voltage, MCU directly thinks and closes LED lamp completely, therefore can close LED lamp completely by manual twice closing switch K1.
In order to improve energy-conservation index, this programme has added MCU park mode circuit simultaneously, and after LED lamp is extinguished, controller, in resting state, cuts off current converter circuit work simultaneously, waits for normal power supply pattern, wakes controller up and reworks.
The utility model LED emergency light is compared with the existing technology simple in structure, easy to use, has ripe manufacturing process, be easy to realize, and low cost of manufacture, and also practical, the intelligent scientific and technological added value that more can improve product of reminding.Effectively the unexpected power-off of identification is turn-offed with artificial, and uses controller to carry out sampling circuit voltage to control LED emergency light luminous flux simultaneously, when reserve battery approaches while having consumed, passes in user by flicker form, avoids something unexpected happened.Use this New LED emergency light, only need to replace traditional fluorescent lamp, do not need to change circuit, offer convenience to installation and maintenance, effectively reduce holistic cost, practical.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (7)
1. a LED emergency light, is characterized in that, comprising: Switching Power Supply, charge-discharge circuit, battery, current converter circuit, voltage acquisition unit and controller;
The input of described Switching Power Supply is connected with AC power, and alternating current is converted to direct current output;
The input of described charge-discharge circuit is connected with the output of described Switching Power Supply, the control end of described charge-discharge circuit is connected with the output of described controller, the output of described charge-discharge circuit is connected with the input of described battery, for giving described battery charging;
The output of described battery is connected with the input of described current converter circuit, while stopping output current for described Switching Power Supply for described current converter circuit provides electric current;
The input of described current converter circuit is connected with the output of the output of described Switching Power Supply and described battery, for being that constant current is powered to LED lamp by the current conversion of described Switching Power Supply or described battery output;
The input of described voltage acquisition unit is connected with the output of the output of described Switching Power Supply, described battery, the output of described voltage acquisition unit is connected with the input of described controller, for gathering the voltage of described Switching Power Supply and the output of described battery and sending to described controller;
The output of described controller is connected with the control end of the control end of described charge-discharge circuit and described current converter circuit, charges the battery to described current converter circuit according to the voltage signal output control signal of the described Switching Power Supply of described voltage collection circuit collection and the output of described battery to adjust the brightness of described LED lamp and to control described charge-discharge circuit.
2. LED emergency light as claimed in claim 1, it is characterized in that, also comprise: the 11 diode and the 12 diode, the output of Switching Power Supply described in the anodic bonding of described the 11 diode, negative electrode connects the input of described current converter circuit, the output of battery described in the anodic bonding of described the 12 diode, negative electrode connects the input of described current converter circuit.
3. LED emergency light as claimed in claim 1, it is characterized in that, described voltage collection circuit comprises: the 21 resistance and the 22 resistance, the first end of described the 21 resistance connects the output of described Switching Power Supply and the output of described battery, the second end of described the 21 resistance connects described the 22 first end of resistance and the input of described controller, the second end ground connection of described the 22 resistance.
4. LED emergency light as claimed in claim 1, is characterized in that, also comprises the first switch, and described the first switch is between described AC power and described Switching Power Supply.
5. LED emergency light as claimed in claim 1, is characterized in that, also comprises: be connected with the output of described controller, for pointing out the prompt facility of powered battery state.
6. LED emergency light as claimed in claim 5, is characterized in that, described prompt facility comprises the first indicator light and the second indicator light, the output of the anodic bonding controller of described the first indicator light, minus earth, the output of the anodic bonding controller of described the second indicator light, minus earth.
7. LED emergency light as claimed in claim 1, is characterized in that, described current converter circuit is DC/DC constant-current source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320727929.5U CN203734876U (en) | 2013-11-15 | 2013-11-15 | LED emergency lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320727929.5U CN203734876U (en) | 2013-11-15 | 2013-11-15 | LED emergency lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203734876U true CN203734876U (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320727929.5U Expired - Fee Related CN203734876U (en) | 2013-11-15 | 2013-11-15 | LED emergency lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203734876U (en) |
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2013
- 2013-11-15 CN CN201320727929.5U patent/CN203734876U/en not_active Expired - Fee Related
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140723 Termination date: 20151115 |
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| EXPY | Termination of patent right or utility model |