CN102413609A - Low-power illuminating system with LED (light-emitting diode) lamps - Google Patents
Low-power illuminating system with LED (light-emitting diode) lamps Download PDFInfo
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- 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 invention discloses a low-power illuminating system with LED (light-emitting diode) lamps. The system comprises an intelligent AC-DC (alternating current-direct current) power supply converter, the LED lamps, lamp switches and a parallel-type cable, wherein the input end of the intelligent AC-DC power supply converter is connected with an AC power supply; the low-voltage DC output end of the intelligent AC-DC power supply converter is connected with multiple LED lamps; the multiple LED lamps are connected in parallel; each LED lamp is connected with the lamp switch used for controlling the power-on and power-off of the LED lamp in series and then connected to the low-voltage DC output end of the intelligent AC-DC power supply converter; and each LED lamp is internally provided with a high-precision constant-current control circuit. The low-power illuminating system with the LED lamps can be used for solving the problems such as low power supply conversion efficiency, low system power factor, low constant-current control accuracy and the like in LED illumination application with lower cost and prolonging the service life of each LED lamp and the product safety.
Description
Technical field
The present invention relates to a kind of low-power LED lamp illuminator.
Background technology
Along with progress of science and technology, lighting develops into Halogen lamp LED, high-pressure sodium lamp, fluorescent lamp etc. from incandescent lamp, towards energy-saving and environmental protection, direction is not stopped paying out exhibition cheaply.In recent years the LED lighting that rises has advantages such as theoretical life-span length, energy-conserving and environment-protective, technical development space are big, and growth momentum is swift and violent.30W designs the brightness twice that brightness has surpassed the common energy-saving lamp tool of identical power consumption with interior low-power LED lamp, also reaches more than 5 times of common energy-saving lamp tool designed life.Existing 220V or 110V alternating-current power supply LED light fixture majority are that 30W is with interior small-power light fixture; This type light fixture is general to adopt built-in high pressure conversion electric power mode to drive: the built-in inverse-excitation type alternating current-direct current of lamp body is isolated conversion electric power type of drive or the built-in non-isolation ac-dc switching power type of drive of lamp body, is the design that one road high-voltage alternating changes the corresponding LED light fixture of DC circuit.A problem or a plurality of problem in the useful life that this design exists that power supply conversion efficiency is low, constant-current control accuracy is low, the system power factor is low, electric network security is low, Product Safety is low, the light fixture heat waste is high, cause because of the lamp body temperature the is too high problem such as short and power source conversion control section manufacturing cost height.At present existing products and technical scheme all can not be more than the comprehensive solution several problems.The existing following LED lighting of 5W is subject to factors such as cost and lamp body volume; Generally not to driving power power factor correcting; Power factor generally has only 0.4～0.6; Usually the non-isolation drive mode of high pressure or the inverse-excitation type isolation drive mode that adopt in the low-power LED lamp, after carrying out power factor correction, power factor generally also has only 0.85～0.95.A large amount of low power factor products that use can seriously reduce mains supply efficient, threaten power grid security.Because low-power LED lamp driving power part is higher from power consumption part accounting, and the conversion efficiency of power supply is lower, constant-current control accuracy is generally lower in addition.Comprehensive existing alternating-current power supply LED lighting technology is used, and the technical matters that small power LED illumination need solve or improve comprise: power supply conversion efficiency, system power factor, constant-current control accuracy, lamp body heat radiation, the life-span of driving power, luminous efficiency and the Product Safety of LED lamp pearl.
Multiple solution has targetedly appearred now to technical matters such as the Based Intelligent Control that occurs in the LED illumination application, heat radiation, product reliability and fail safes.To be the invention of China of 200920046316.9 disclosed a kind of " LED road lamp power supply wire structures " on February 24th, 2010 with being beneficial to application number; Wherein said wiring and system configuration emphasis solve the problem that lamp body heat radiation, power supply reliability and switch control than the high-power LED street lamp are used, and can not solve fail safe hidden danger and the small power LED illumination of high-voltage alternating in using other technical matters in using.Application number is that 201020228314.4 Chinese invention patent discloses a kind of " distribution type LED illumination interior lighting system " on January 5th, 2011; Said distributed lighting system isolates several kinds of fixing voltages of output with conversion electric power and lamp body; Each LED lamp body needs independent wiring; And each LED lamp body needs corresponding rectification control board, has only solved safety issue and lamp body, power supply separates heat dissipation problem, but has increased the wiring complexity; All less than solving, and complex structure, cost are than higher to the aspect problems such as constant-current control accuracy, conversion efficiency and power factor that occur in the LED illumination application.
Summary of the invention
The present invention is the weak point that exists in the above-mentioned prior art for avoiding, and a kind of low-power LED lamp illuminator is provided, and has solved that the power supply conversion efficiency of LED illuminator is low, the system power factor is low and problem such as constant-current control accuracy is low with lower cost.
The present invention adopts following technical scheme for solving the problems of the technologies described above.
Low-power LED lamp illuminator, its design feature are to comprise AC power, intelligent AC-DC power supply changeover device, LED light fixture, the sharp parallel cable of lamp switch; The input of said intelligent AC-DC power supply changeover device is connected with AC power; The low-voltage direct output of said intelligent AC-DC power supply changeover device is connected with a plurality of LED light fixtures; Each LED light fixture and the low-voltage direct output that is connected to intelligent AC-DC power supply changeover device after the lamp switch that is used to control its energising/outage is connected are set with mode parallel with one another between said a plurality of LED light fixture; Said each LED lamp interior is provided with the high-accuracy and constant flow control circuit.
The design feature of low-power LED lamp illuminator of the present invention also is:
Said intelligent AC-DC power supply changeover device comprises that DC12V output, intelligent controller, blower fan radiating control unit, the bearing power of mains switch, rectification and EMI circuit, power transfer module, low-voltage direct out-put supply module, power transfer module account for rated output power than display unit, sound and light alarm output unit with close output select unit automatically; Low-voltage direct out-put supply module comprises load current sampling resistor and normally closed type output control relay; Said rectification and EMI circuit be connected to the 220V AC power after said mains switch is connected in series; Said rectification and EMI circuit are connected with power transfer module; The low-voltage direct output of power transfer module is connected with low-voltage direct out-put supply module; The low-voltage direct output cathode end of power transfer module is as the cathode output end of low-voltage direct out-put supply module, is connected in series behind load current sampling resistor and the normally closed type output control relay cathode output end as low-voltage direct out-put supply module on the low-voltage direct output negative pole end of power transfer module successively; The cathode output end of said low-voltage direct out-put supply module is connected with negative input with the electrode input end of LED light fixture respectively with cathode output end; The DC12V output of said power transfer module is connected with said intelligent controller; Said intelligent controller is connected with the load current sampling resistor, also is connected with the normally closed type output control relay; Said blower fan radiating control unit, bearing power account for rated output power than display unit, sound and light alarm output unit with close output select unit automatically and all be connected with intelligent controller.
The built-in high-accuracy and constant flow control circuit of said light fixture comprises rectification circuit, high-precision current sampling comparison resistance, fly-wheel diode, removes ripple electric capacity, afterflow inductance and electric current comparison controller; Said rectification circuit is connected with the low-voltage direct output of said intelligent AC-DC power supply changeover device; The cathode output end of rectification circuit divides three the tunnel to connect: the one tunnel directly is connected a sample rate current input of electric current comparison controller; Another road is turn-offed control end with the afterflow inductance with the electric current of electric current comparison controller through high-precision current sampling comparison resistance, LED lamp pearl successively and is connected, and the fly-wheel diode of leading up to again turn-offs control end with the electric current of electric current comparison controller and is connected; Another sample rate current input of said electric current comparison controller is connected between said high-precision current sampling comparison resistance and the LED lamp pearl.
Compared with present technology, beneficial effect of the present invention is embodied in:
Owing to adopted intelligent controller, blower fan radiating control unit, bearing power to account for rated output power than display unit, sound and light alarm output unit with close output select unit automatically, made illuminator of the present invention have following function:
(1) intelligent air-cooled controlled function: whether the variations in temperature decision according to power supply changeover device self core heat waste element starts the blower fan heat radiation, reduces the energy loss of blower fan heat radiation in the power supply changeover device course of work, prolongs the actual life of cooling fan;
(2) the power supply changeover device bearing power accounts for rated output power and indicates (or digital demonstration) function and bearing power variation prompting function than LED: make things convenient for user's intuitive judgment electric consumption on lighting loss situation; The auditory tone cues of switch lamp helps to improve user's awareness of saving energy, turns off the LED light fixture that need not light;
(3) power supply changeover device hand control switch power cutoff input function: under the situation that need not for a long time to throw light on the user, the complete power cutoff input of hand control switch is to reduce the system standby loss;
(4) power supply changeover device can select to automatically shut down output function: the user can select this function according to the manual button of actual service conditions; After selecting this function; Power supply changeover device in bearing power greater than the intelligent controller programmed values and surpass under the condition of program setting time-preserving and automatically shut down whole outputs, use this function after, forgetting for a long time under the situation of turning off the light; Power supply changeover device intelligent decision function on is realized automatic powered-down output; Corresponding above-mentioned functions, power supply changeover device carry out turn-off output after, the user is once more by this function selecting key, the output that can a key restores electricity, illuminator starts fast;
(5) power supply changeover device overload sound and light of alarm: power supply changeover device output loading power near or be slightly larger than under the condition of nominal load power; Power supply changeover device sound and light alarm deixis starts; Remind the user to turn off the part light fixture, realized having improved energy-conservation the time security of system;
(6) power supply changeover device high temperature automatically shuts down output function: power supply causes quick permanent damages easily under the inner localized hyperthermia of power supply situation; Startup automatically shut down output after high temperature appearred in power supply changeover device inside; Protection power supply changeover device inherently safe, and the output that after temperature returns to normal range (NR), restores electricity again;
(7) power supply changeover device load overcurrent automatically shuts down function: the load immediate current increases to the fixed load electric current that far exceeds the quata; Power supply changeover device in the time of＜1ms fast response turn-off output function; And power cutoff output in 20ms; Avoid the user error operation to cause power supply or load damage, the output that will restore electricity after overcurrent protection starts need be restarted power supply changeover device.
Owing to adopted intelligent AC-DC power supply changeover device; Simultaneously the high-accuracy and constant flow control circuit is arranged within the lamp body of LED light fixture; The present invention solves or has improved problem such as short and power source conversion control section manufacturing cost height in the power supply conversion efficiency that exists during small power LED illumination is used is low, constant-current control accuracy is low, the system power factor is low, electric network security is low, Product Safety is low, the light fixture heat waste high, cause because of the lamp body temperature is too high useful life; Not only cost reduces, and has improved LED light fixture serviceability.
Description of drawings
Fig. 1 is the structured flowchart of low-power LED lamp illuminator of the present invention.
Fig. 2 is the structured flowchart of the intelligent AC-DC power supply changeover device of low-power LED lamp illuminator of the present invention.
Fig. 3 is the internal circuit configuration block diagram of the LED light fixture of low-power LED lamp illuminator of the present invention.
Label among Fig. 1～Fig. 3: 1,220V AC power; 2, intelligent AC-DC power supply changeover device; 3, parallel cable; 4, lamp switch; 5, LED light fixture; 201, mains switch; 202, rectification and EMI circuit; 203, power transfer module; 204, load current sampling resistor; 205, low-voltage direct out-put supply module; 206, DC12V output; 207, intelligent controller; 208, normally closed type relay; 209, blower fan radiating control unit; 210, bearing power accounts for rated output power and compares display unit; 211, sound and light alarm output unit; 212, close output select unit automatically; 51, rectification circuit; 52, high-precision current sampling comparison resistance; 53, fly-wheel diode; 54, remove ripple electric capacity; 55, afterflow inductance; 56, LED lamp pearl; 57, electric current comparison controller; 58, electric current turn-offs control end.
Below pass through embodiment, and combine accompanying drawing that the present invention is described further.
Embodiment
Referring to Fig. 1, the low-power LED lamp illuminator comprises AC power 1, intelligent AC-DC power supply changeover device 2, LED light fixture 5, lamp switch 4 and parallel cable 3; The input of said intelligent AC-DC power supply changeover device 2 links to each other with AC power 1 and presses; The low-voltage direct output of said intelligent AC-DC power supply changeover device 2 is connected with a plurality of LED light fixtures 5; Each LED light fixture 5 and the low-voltage direct output that is connected to intelligent AC-DC power supply changeover device 2 after the lamp switch 4 that is used to control its energising/outage is connected are set with mode parallel with one another between said a plurality of LED light fixture 5; Said each LED light fixture 5 inside are provided with the high-accuracy and constant flow control circuit.In the said parallel cable 3; Interconnect with mode parallel with one another between many cables; Lamp switch 4 is connected with intelligent AC-DC power supply changeover device 2 through this parallel cable 3, thereby makes and can be connected with mode parallel with one another on the low-voltage direct output of intelligent AC-DC power supply changeover device 2 between said a plurality of LED light fixture 5.Said AC power 1 can be the 220V AC power, also can be the 110V AC power, or the AC power of effective voltage between 85V～300V.Said LED light fixture 5 comprises one or more LED lamp pearls 56 and high-accuracy and constant flow control circuit." constant current control " frame among Fig. 1 in the LED light fixture 5 is said high-accuracy and constant flow control circuit.
As shown in Figure 2, said intelligent AC-DC power supply changeover device 2 comprises that DC12V output 206, intelligent controller 207, blower fan radiating control unit 209, the bearing power of mains switch 201, rectification and EMI circuit 202, power transfer module 203, low-voltage direct out-put supply module 205, power transfer module 203 account for rated output power than display unit 210, sound and light alarm output unit 211 with close output select unit 212 automatically; Low-voltage direct out-put supply module 205 comprises load current sampling resistor 204 and normally closed type output control relay 208; Said rectification and EMI circuit 202 be connected to the 220V AC power after said mains switch 201 is connected in series; Said rectification and EMI circuit 202 are connected with power transfer module 203; The low pressure of power transfer module 203 should flow output and be connected with low-voltage direct out-put supply module 205; The low-voltage direct output cathode end of power transfer module 203 is connected in series load current sampling resistor 204 and the cathode output end of normally closed type output control relay 208 backs as low-voltage direct out-put supply module 205 successively as the cathode output end of low-voltage direct out-put supply module 205 on the low-voltage direct output negative pole end of power transfer module 203; The cathode output end of said low-voltage direct out-put supply module 205 is connected with negative input with the electrode input end of LED light fixture respectively with cathode output end; The DC12V output 206 of said power transfer module 203 is connected with said intelligent controller 207; Said intelligent controller 207 is connected with load current sampling resistor 204, also is connected with normally closed type output control relay 208; Said blower fan radiating control unit 209, bearing power account for rated output power than display unit 210, sound and light alarm output unit 211 with close output select unit 212 automatically and all be connected with intelligent controller 207.
As shown in Figure 3, the built-in high-accuracy and constant flow control circuit of said light fixture comprises rectification circuit 51, high-precision current sampling comparison resistance 52, fly-wheel diode 53, removes ripple electric capacity 54, afterflow inductance 55 and electric current comparison controller 57; Said rectification circuit 51 is connected with the low-voltage direct output of said intelligent AC-DC power supply changeover device 2; The cathode output end of rectification circuit 51 divides three the tunnel to connect: the one tunnel directly is connected on the sample rate current input of electric current comparison controller 57; Another road is turn-offed control end with afterflow inductance 55 with the electric current of electric current comparison controller 57 through high-precision current sampling comparison resistance 52, LED lamp pearl 56 successively and is connected, and the fly-wheel diode of leading up to again turn-offs control end with the electric current of electric current comparison controller 57 and is connected; Another sample rate current input of said electric current comparison controller 57 is connected between said high-precision current sampling comparison resistance 52 and the LED lamp pearl 56.
Said intelligent AC-DC power supply changeover device 2 input termination 220V AC powers, the low-voltage dc power supply of output output is 5 power supplies of LED light fixture; LED light fixture 5 serial connection switches 4 backs are connected with the low-voltage direct output of intelligent AC-DC power supply changeover device 2.LED light fixture 5 is connected with the low-voltage direct output of power supply changeover device 2 through parallel cable 3, adopts the mode that is connected in parallel between a plurality of LED light fixtures 5, to guarantee and can control one or several LED lamp switch through lamp switch.
Like Fig. 1 and Fig. 2; Intelligent AC-DC power supply changeover device 2 is except that realizing that basic high-voltage alternating changes the low-voltage direct output function; Application characteristic to the LED lamp illuminating system; Increase the Based Intelligent Control design, increased blower fan heat-sink unit, high temperature and overcurrent output protecting function, the load controlled automatically according to the power supply variations in temperature and accounted for rated output power than Presentation Function, the selectable output function etc. that automatically shuts down.
Like Fig. 2, the 220V AC power inserts rectifier circuit and EMI circuit 202 through mains switch 201, and the 220V alternating current transfers the high pressure unidirectional current to and outputs to power transfer module 203 behind over commutation and EMI circuit 202.Power transfer module 203 adopts the positive activation type conversion regimes, and it mainly comprises active circuit of power factor correction, has the control chip of auto-excitation type oscillation functions, switching tube, positive activation type transformer, output voltage feedback loop etc.Active circuit of power factor correction is realized power factor emendation function, guarantees that input current and voltage keep near-synchronous to reduce the reactive loss of power supply grid, realize the High Power Factor design of transducer.Control chip with auto-excitation type oscillation functions is realized the switching frequency control of switching tube; Switching tube in control chip control down according to set frequency conducting or shutoff high pressure switching current; The positive activation type primary is connected with switching tube; When the switching tube conducting, to transformer secondary output the conversion magnetic energy is provided, secondary output current; When switching tube turn-offs, stop the conversion magnetic energy being provided to transformer secondary output, transformer stops the magnetic conversion.Whether output voltage feedback loop real-time judge transformer secondary output output voltage is higher than set point; When output voltage was higher than set point, feedback loop output cut-off signals was to control chip, and control chip control switch pipe turn-offs, and stopped transformer output conversion.The transformer secondary output output current is exported low-voltage dc power supply behind the rectification ripple.Transformer secondary output adopts two-tap output, and output two-way DC power supply: the one tunnel is LED electric (importing the rectification circuit 51 of said high-accuracy and constant flow control circuit), and one the tunnel is that intelligent controller 207 control circuits such as grade provide power supply.LED light fixture power supply forms current supply circuit through load current sampling resistor 204, normally closed type output control relay 208 with the load of LED light fixture.Power transfer module DC12V output 206 partly provides working power for intelligent controller 207 control circuits such as grade.
With reference to figure 2, intelligent controller 207 core devices are MCU controllers of built-in AD translation function, and blower fan radiating control unit 209 is main by a dc fan and two power supply heat sinking control circuits that thermistor is formed.Two thermistors place respectively on the high heat waste devices switch pipe and transformer of power transfer module 203; As two temperature sampling points; Intelligent controller 207 is through the temperature of two points of AD conversion regime sampling; Intelligent controller 207 drives the blower fans heat radiation when the temperature of one of them temperature sampling point surpasses its set point, and when the temperature of two temperature sampling points was all in set point, intelligent controller 207 was closed down blower fan and dispelled the heat.When any temperature sampling value surpasses it during high set point; Controller output control signal control normally closed type output control relay 208 turn-offs the output of LED power supply; Intelligent controller 207 control sound and light alarm output units 211 send the high temperature alarm signal of setting simultaneously; Remind user's power supply changeover device inside high temperature to occur, executed high temperature protection function prevents power supply changeover device because too high causing of internal temperature damages.
Intelligent controller 207 flows through the electric current of load current sampling resistor 204 through AD conversion operations real-time sampling; When the electric current that flows through load current sampling resistor 204 near or when surpassing nominal load current slightly; Intelligent controller 207 control sound and light alarm output units 211 send the full load sound and light alarm cue of setting; Remind the user load electric current excessive, need the cutoff load; When the electric current that flows through load current sampling resistor 204 increases to suddenly when far exceeding the quata the fixed load electric current; Intelligent controller 207 output control signals; Control normally closed type output control relay 208 turn-offs the output of LED power supply; Intelligent controller 207 control sound and light alarm output units 211 send the overcurrent alarm signal of setting simultaneously, and it is unusual to remind user's power supply changeover device load current to occur, the executed overcurrent protection function.
Intelligent controller 207 flows through the electric current of load current sampling resistor 204 through AD conversion operations real-time sampling; And with the load current value of sampling and the nominal load current value comparison of setting; The computational load electric current accounts for the percent value of nominal load current; Intelligent controller 207 accounts for rated output power through tool output port control load power and than display unit 210 this percent value is shown; Display mode can be that LED light combines power supply changeover device shell silk-screen digital mode in the specific embodiment, also can be the mode that the LED charactron shows.
Automatically closing output select unit 212 is made up of a function selecting button and a LED light.Intelligent controller 207 acquiescences do not start closes output function automatically, and LED light is not done demonstration yet, and the user presses function selecting key and can select startup to close output function automatically, and LED light is lighted, and button is closed this function once more, and LED light is extinguished.After selecting this function, intelligent controller 207 flows through the electric current of load current sampling resistor 204 through AD conversion operations real-time sampling, and carries out variable power comparison and timing operation.When bearing power greater than nominal load power 5% and surpass 12 hours bearing powers and do not have any variation; Intelligent controller 207 output control signals; Control normally closed type output control relay 208 turn-offs the output of LED lamp power, and the frequency demonstration of the LED light of output select unit 212 with 1Hz closed in control automatically.Corresponding above-mentioned functions, intelligent controller 207 carry out turn-off output after, the user is once more by the function selecting key of closing output select unit 212 automatically, the output that can a key restores electricity, illuminator starts fast.
When carrying out, the user closes when turning on light operation; The electric current that flows through load current sampling resistor 204 changes thereupon; Intelligent controller 207 flows through the electric current of load current sampling resistor 204 through AD conversion operations real-time sampling; When intelligent controller 207 judged that bearing power changes above programmed values, the bearing power that intelligent controller 207 control sound and light alarm output units 211 send setting changed auditory tone cues.
Fig. 3 is a lamp body internal structure sketch map; The power supply changeover device output dc voltage is that LED light fixture 5 provides constant-voltage DC source; LED lamp pearl is as light emitting semiconductor device, and its characteristic is that the constant current input requires height, for stablizing the luminous power of LED lamp pearl; Prolong its useful life, all built-in constant-current control circuit shown in Figure 3 of each LED light fixture 5.LED light fixture input low-voltage dc power supply for electric current comparison controller 57 provides working power, and provides power supply for LED lamp pearl 56 luminous loops behind low pressure differential rectification circuit 51.Electric current comparison controller 57 built-in auto-excitation type oscillators; Turn-off control end 58 break-makes with the fixed frequency Control current; Electric current is through high-precision current sampling comparison resistance 52, LED lamp pearl 56, afterflow inductance 55 during conducting; Be conducting to the negative power end of rectification circuit 51 through electric current comparison controller 57 internal switch pipes; Electric current comparison controller 57 is high-precision currents sampling comparison resistance 52 voltage relatively in real time, when the voltage difference at high-precision current sampling comparison resistance 52 two ends during greater than set point electric current turn-off control end 58 and turn-off input currents, utilize inductance to have energy storage and the characteristic that stops current break behind the cut-off current; Form the current circuit of afterflow inductance 55, fly-wheel diode 53, high-precision current sampling comparison resistance 52, LED lamp pearl 56, the electric current of the LED lamp pearl 56 that keeps flowing through.Electric current comparison controller 57 built-in oscillating circuits provide fixing frequency to carry out reciprocal electric current of make-and-break and turn-off control end 58, realize the Current Control of LED lamp pearl.Go ripple electric capacity 54 to play the effect that LED lamp pearl voltage is removed ripple,, improve constant-current control accuracy to realize littler current fluctuation.
The built-in high precision constant current control Driver Circuit of LED light fixture, to improve LED lamp pearl useful life, its rectification circuit adopts low pressure differential design, reduces the power supply heat waste.In the preferred embodiment of the present invention, built-in high precision constant current control Driver Circuit constant current delivery efficiency＞95%, constant current accuracy ± 1%.Power supply changeover device output low-voltage dc voltage must be lower than the highest standard to human body direct current safe voltage, simultaneously can not be too low to reduce line resistance loss and to take into account the built-in constant-current control circuit delivery efficiency of lamp body.Output dc voltage is 28V ± 1V in the preferred embodiment of the present invention.The present invention separates high-voltage alternating conversion electric power part to reduce the lamp body heat radiation with lamp body; Reduced the joint temperature of LED lamp pearl; Prolong the useful life of LED lamp pearl, can save short electrochemical capacitor of temperature influence life-span in the lamp body, prolonged the useful life of light fixture.The low-power LED lamp illuminator is in the LED lamp illuminating system more than 10 is used; The supply power mode of a relative lamp one high pressure conversion electric power; Manufacturing cost obviously reduces; In the preferred embodiment of the present invention, under existing element purchase cost condition, system's manufacturing cost reduces above 10%.
Through above-mentioned description, the related personnel can change and revise under the condition of mentality of designing of the present invention and technical indicator appointment.Technical scope of the present invention is not limited to the content on the specification, must confirm technical scope according to the claim scope.
Claims (3)
1. the low-power LED lamp illuminator is characterized in that, comprises AC power (1), intelligent AC-DC power supply changeover device (2), LED light fixture (5), lamp switch (4) and parallel cable (3); The input of said intelligent AC-DC power supply changeover device (2) is connected with AC power (1); The low-voltage direct output of said intelligent AC-DC power supply changeover device (2) is connected with a plurality of LED light fixtures (5); Each LED light fixture (5) and the low-voltage direct output that is connected to intelligent AC-DC power supply changeover device (2) after the lamp switch that is used to control its energising/outage (4) is connected are set with mode parallel with one another between said a plurality of LED light fixtures (5); Said each LED light fixture (5) inside is provided with the high-accuracy and constant flow control circuit; Be connected through parallel cable (3) between said intelligent AC-DC power supply changeover device and lamp switch and the LED light fixture.
2. low-power LED lamp illuminator according to claim 1; It is characterized in that said intelligent AC-DC power supply changeover device (2) comprises that DC12V output (206), intelligent controller (207), blower fan radiating control unit (209), the bearing power of mains switch (201), rectification and EMI circuit (202), power transfer module (203), low-voltage direct out-put supply module (205), power transfer module (203) account for rated output power than display unit (210), sound and light alarm output unit (211) with close output select unit (212) automatically; Low-voltage direct out-put supply module (205) comprises load current sampling resistor (204) and normally closed type output control relay (208);
Said rectification and EMI circuit (202) be connected to AC power (1) after said mains switch (201) is connected in series; Said rectification and EMI circuit (202) are connected with power transfer module (203); The low-voltage direct output of power transfer module (203) is connected with low-voltage direct out-put supply module (205); The low-voltage direct output cathode end of power transfer module (203) is connected in series the cathode output end of load current sampling resistor (204) and normally closed type output control relay (208) back as low-voltage direct out-put supply module (205) successively as the cathode output end of low-voltage direct out-put supply module (205) on the low-voltage direct output negative pole end of power transfer module (203); The cathode output end of said low-voltage direct out-put supply module (205) is connected with negative input with the electrode input end of LED light fixture respectively with cathode output end;
The DC12V output (206) of said power transfer module (203) is connected with said intelligent controller (207); Said intelligent controller (207) is connected with load current sampling resistor (204), also is connected with normally closed type output control relay (208); Said blower fan radiating control unit (209), bearing power account for rated output power than display unit (210), sound and light alarm output unit (211) with close output select unit (212) automatically and all be connected with intelligent controller (207).
3. low-power LED lamp illuminator according to claim 1; It is characterized in that the built-in high-accuracy and constant flow control circuit of said LED light fixture comprises rectification circuit (51), high-precision current sampling comparison resistance (52), fly-wheel diode (53), removes ripple electric capacity (54), afterflow inductance (55) and electric current comparison controller (57);
Said rectification circuit (51) is connected with the low-voltage direct output of said intelligent AC-DC power supply changeover device (2); The cathode output end of rectification circuit (51) divides three the tunnel to connect: the one tunnel directly is connected on the sample rate current input of electric current comparison controller (57); Another road is turn-offed control end with afterflow inductance (55) with the electric current of electric current comparison controller (57) through high-precision current sampling comparison resistance (52), LED lamp pearl (56) successively and is connected, and the fly-wheel diode of leading up to again turn-offs control end with the electric current of electric current comparison controller (57) and is connected; Another sample rate current input of said electric current comparison controller (57) is connected between said high-precision current sampling comparison resistance (52) and the LED lamp pearl (56).
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| CN2011103466777A CN102413609B (en) | 2011-11-04 | 2011-11-04 | Low-power illuminating system with LED (light-emitting diode) lamps |
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| CN2011103466777A CN102413609B (en) | 2011-11-04 | 2011-11-04 | Low-power illuminating system with LED (light-emitting diode) lamps |
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Denomination of invention: Low-power illuminating system with LED (light-emitting diode) lamps Effective date of registration: 20170317 Granted publication date: 20131113 Pledgee: Merchants Bank Hefei Dongmen branch Pledgor: ANHUI APIG XINHUI OPTOELECTRONIC TECHNOLOGY Co.,Ltd. Registration number: 2017340000038 |
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