CN102413609B - 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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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 miniwatt LED light illumination system.
Background technology
Along with the 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, have the advantages such as theoretical life-span length, energy-conserving and environment-protective, technical development space are large, and growth momentum is swift and violent.30W has surpassed the brightness twice of the common energy-saving lamp tool of identical power consumption with interior low-power LED lamp design brightness, 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 class light fixture generally adopts internal high-voltage conversion electric power mode to drive: the built-in inverse-excitation type alternating current-direct current isolation conversion electric power type of drive of lamp body or the built-in non-isolation ac-dc switching power type of drive of lamp body are a road high-voltage alternating and turn the design of 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 excess Temperature problem such as short and power supply conversion and control part manufacturing cost height.Present existing product and technical scheme all can not the above several problems of comprehensive solution.The existing following LED lighting of 5W is subject to the factors such as cost and lamp body volume, general tree driving power power factor correcting, power factor generally only has 0.4～0.6, usually the non-isolation drive mode of high pressure or the inverse-excitation type isolation drive mode that adopt in low-power LED lamp, after carrying out power factor correction, power factor generally also only has 0.85～0.95.A large amount of low power factor products that use, can seriously reduce mains supply efficiency, threatens power grid security.Because low-power LED lamp driving power part is higher from power consumption part accounting, the conversion efficiency of power supply is lower in addition, and constant-current control accuracy is generally lower.Comprehensive existing alternating-current power supply LED lighting technology application, the technical matters that small power LED illumination need to 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 for the technical matters such as Based Intelligent Control, heat radiation, product reliability and fail safe that occur in LED illumination application.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, lamp body heat radiation, power supply reliability and the switch that wherein said wiring and system configuration emphasis solve the LED street lamp of relatively high power controlled the problem of application, can not solve fail safe hidden danger in the high-voltage alternating application and other technical matters in the small power LED illumination application.application number is that 201020228314.4 Chinese invention patent discloses a kind of " distribution type LED illumination interior lighting system " on January 5th, 2011, described distributed illumination system is exported fixing several voltages with conversion electric power and lamp body isolation, each LED lamp body needs independent wiring, and each LED lamp body needs corresponding rectification control board, safety issue and lamp body have only been solved, power supply separates heat dissipation problem, but increased the wiring complexity, to the constant-current control accuracy that occurs in LED illumination application, the aspect such as conversion efficiency and power factor problem is all less than solving, and complex structure, cost compare is high.
Summary of the invention
The present invention is the weak point that exists in above-mentioned prior art for avoiding, and a kind of miniwatt LED light illumination system is provided, and with lower cost, has solved that the power supply conversion efficiency of LED illuminator is low, the system power factor is low and the problem such as constant-current control accuracy is low.
The present invention is for solving the problems of the technologies described above by the following technical solutions.
Miniwatt LED light illumination system, its design feature are to comprise AC power, intelligent AC-DC power supply changeover device, LED light fixture, the parallel cable of lamp switch profit; The input of described intelligent AC-DC power supply changeover device is connected with AC power, the low-voltage direct output of described 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 used for after its lamp switch of switching on/cutting off the power supply of control is connected being connected to intelligent AC-DC power supply changeover device are set in mode parallel with one another between described a plurality of LED light fixture; Described each LED lamp interior is provided with the high-accuracy and constant flow control circuit.
The design feature of miniwatt LED light illumination system of the present invention also is:
Described intelligent AC-DC power supply changeover device comprises that mains switch, rectification and EMI circuit, power transfer module, low-voltage direct out-put supply module, the DC12V output of power transfer module, intelligent controller, fan radiating control unit, bearing power account for rated output power than display unit, sound and light alarm output unit and automatically close output select unit; Low-voltage direct out-put supply module comprises load current sampling resistor and normally closed type output control relay; Described rectification and EMI circuit be connected to the 220V AC power after described mains switch is connected in series; Described 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 successively after load current sampling resistor and normally closed type output control relay the cathode output end as low-voltage direct out-put supply module on the low-voltage direct output negative pole end of power transfer module; The cathode output end of described 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 described power transfer module is connected with described intelligent controller; Described intelligent controller is connected with the load current sampling resistor, also with the normally closed type output control relay, is connected; Described fan radiating control unit, bearing power account for rated output power than display unit, sound and light alarm output unit and automatically close output select unit and all with intelligent controller, be connected.
The built-in high-accuracy and constant flow control circuit of described 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; Described rectification circuit is connected with the low-voltage direct output of described intelligent AC-DC power supply changeover device, the cathode output end of rectification circuit divides three tunnels to connect: a road directly is connected to a sample rate current input of electric current comparison controller, another road is turn-offed control end and is connected by the sample electric current of comparison resistance, LED lamp pearl and afterflow inductance and electric current comparison controller of high-precision current successively, then leads up to fly-wheel diode and be connected with the electric current shutoff control end of electric current comparison controller; Another sample rate current input of described electric current comparison controller is connected between described high-precision current sampling comparison resistance and LED lamp pearl.
Compared with the prior art, beneficial effect of the present invention is embodied in:
, owing to having adopted intelligent controller, fan radiating control unit, bearing power account for rated output power than display unit, sound and light alarm output unit and automatically close output select unit, make illuminator of the present invention have following function:
(1) intelligent air-cooled control function: determine whether to start fan radiating according to the variations in temperature of power supply changeover device self core heat waste element, reduce the energy loss of fan radiating in the power supply changeover device course of work, extend 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: facilitate 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 and does not need the LED that lights light fixture;
(3) power supply changeover device hand control switch power cutoff input function: in the situation that the user need not to throw light on for a long time, the complete power cutoff input of hand control switch is reduced the system standby loss;
(4) power supply changeover device can select to automatically shut down output function: the user can select this function by button manual according to actual service conditions, after selecting this function, power supply changeover device automatically shuts down whole outputs in bearing power greater than the intelligent controller programmed values and under the condition of program setting time-preserving, after using this function, in the situation that forget and turn off the light for a long time, the power supply changeover device intelligent judgment function starts, and realizes automatic powered-down output; Corresponding above-mentioned functions, power supply changeover device are after carrying out and turn-offing output, and the user is again by this function selecting key, the output that can a key restores electricity, and illuminator starts fast;
(5) power supply changeover device overload sound and light of alarm: at power supply changeover device output loading power, approach or be slightly larger than under the condition of nominal load power, power supply changeover device sound and light alarm deixis starts, reminding user is turned off the part light fixture, has realized energy-conservation the time having improved security of system;
(6) power supply changeover device high temperature automatically shuts down output function: power supply easily causes quick permanent damages in the inner localized hyperthermia of power supply situation, after high temperature appears in power supply changeover device inside, startup automatically shuts down output, protection power source transducer inherently safe, and the output that again restores electricity after temperature returns to normal range (NR);
(7) power supply changeover device load overcurrent automatic cut-off function: the load immediate current increases to the fixed load electric current that far exceeds the quata; power supply changeover device within 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 to be restarted power supply changeover device.
Owing to having adopted intelligent AC-DC power supply changeover device, within simultaneously the high-accuracy and constant flow control circuit being arranged at the lamp body of LED light fixture, the present invention solve or improved that the power supply conversion efficiency that exists in the small power LED illumination application 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, useful life of causing because of the lamp body excess Temperature is short and the problem such as power supply conversion and control part manufacturing cost height, cost not only, and improved LED light fixture serviceability.
Description of drawings
Fig. 1 is the structured flowchart of miniwatt LED light illumination system of the present invention.
Fig. 2 is the structured flowchart of the intelligent AC-DC power supply changeover device of miniwatt LED light illumination system of the present invention.
Fig. 3 is the internal circuit configuration block diagram of the LED light fixture of miniwatt LED light illumination system of the present invention.
Label in 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, normal closing type relay; 209, fan radiating control unit; 210, bearing power accounts for rated output power and compares display unit; 211, sound and light alarm output unit; 212, automatically close output select unit; 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 the invention will be further described by reference to the accompanying drawings.
Embodiment
Referring to Fig. 1, miniwatt LED light illumination system, comprise 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 described intelligent AC-DC power supply changeover device 2 is connected and presses with AC power 1, the low-voltage direct output of described 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 used for after its lamp switch 4 of switching on/cutting off the power supply of control is connected being connected to intelligent AC-DC power supply changeover device 2 are set in mode parallel with one another between described a plurality of LED light fixture 5; Described each LED light fixture 5 inside are provided with the high-accuracy and constant flow control circuit.In described parallel cable 3, interconnect in mode parallel with one another between many cables, lamp switch 4 is connected with intelligent AC-DC power supply changeover device 2 by this parallel cable 3, thereby make between described a plurality of LED light fixture 5, can be connected in mode parallel with one another on the low-voltage direct output of intelligent AC-DC power supply changeover device 2.Described AC power 1 can be the 220V AC power, can be also the 110V AC power, or the AC power of effective voltage between 85V～300V.Described LED light fixture 5 comprises one or more LED lamp pearls 56 and high-accuracy and constant flow control circuit." constant current control " frame in Fig. 1 in LED light fixture 5 is described high-accuracy and constant flow control circuit.
As shown in Figure 2, described intelligent AC-DC power supply changeover device 2 comprises that mains switch 201, rectification and EMI circuit 202, power transfer module 203, low-voltage direct out-put supply module 205, the DC12V output 206 of power transfer module 203, intelligent controller 207, fan radiating control unit 209, bearing power account for rated output power than display unit 210, sound and light alarm output unit 211 and automatically close output select unit 212; Low-voltage direct out-put supply module 205 comprises load current sampling resistor 204 and normally closed type output control relay 208; Described rectification and EMI circuit 202 be connected to the 220V AC power after described mains switch 201 is connected in series; Described 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, as the cathode output end of low-voltage direct out-put supply module 205, is connected in series the rear cathode output end as low-voltage direct out-put supply module 205 of load current sampling resistor 204 and normally closed type output control relay 208 successively on the low-voltage direct output negative pole end of power transfer module 203; The cathode output end of described 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 described power transfer module 203 is connected with described intelligent controller 207; Described intelligent controller 207 is connected with load current sampling resistor 204, also with normally closed type output control relay 208, is connected; Described fan radiating control unit 209, bearing power account for rated output power than display unit 210, sound and light alarm output unit 211 and automatically close output select unit 212 and all with intelligent controller 207, be connected.
As shown in Figure 3, the built-in high-accuracy and constant flow control circuit of described 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; Described rectification circuit 51 is connected with the low-voltage direct output of described intelligent AC-DC power supply changeover device 2, the cathode output end of rectification circuit 51 divides three tunnels to connect: a road directly is connected on a sample rate current input of electric current comparison controller 57, another road is turn-offed control end and is connected by the sample electric current of comparison resistance 52, LED lamp pearl 56 and afterflow inductance 55 and electric current comparison controller 57 of high-precision current successively, then leads up to fly-wheel diode and be connected with the electric current shutoff control end of electric current comparison controller 57; Another sample rate current input of described electric current comparison controller 57 is connected between described high-precision current sampling comparison resistance 52 and LED lamp pearl 56.
Described intelligent AC-DC power supply changeover device 2 input termination 220V AC power, the low-voltage dc power supply of output output is 5 power supplies of LED light fixture; Be connected with the low-voltage direct output of intelligent AC-DC power supply changeover device 2 after LED light fixture 5 serial connection switches 4.LED light fixture 5 is connected with the low-voltage direct output of power supply changeover device 2 by 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 by lamp switch.
As Fig. 1 and Fig. 2; intelligent AC-DC power supply changeover device 2 is except realizing that basic high-voltage alternating turns the low-voltage direct output function; application characteristic for the LED lamp illuminating system; increase Intelligent Control, increased fan radiating unit, high temperature and overcurrent output protecting function, the load automatically controlled 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.
As Fig. 2, the 220V AC power is by mains switch 201 access rectifier circuit and EMI circuit 202, and the 220V alternating current transfers the high pressure unidirectional current to and outputs to power transfer module 203 after 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, realizes 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 under control chip is controlled according to set frequency conducting or turn-off the high pressure switching current, the positive activation type primary is connected with switching tube, when the switching tube conducting, provide the conversion magnetic energy to transformer secondary output, secondary output current; When switching tube turn-offs, stop providing the conversion magnetic energy 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; During higher than set point, feedback loop output cut-off signals is to control chip when output voltage, and control chip control switch pipe turn-offs, and stops transformer output and changes.The transformer secondary output output current is exported low-voltage dc power supply after the rectification ripple.Transformer secondary output adopts two-tap output, and output two-way DC power supply: a road is LED load supplying (inputting the rectification circuit 51 of described high-accuracy and constant flow control circuit), and a road provides power supply for intelligent controller 207 control circuits such as grade.LED light fixture power supply forms current supply circuit through load current sampling resistor 204, normally closed type output control relay 208 with the LED lamp load.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 fan radiating control unit 209 is main by a dc fan and two power supply heat sinking control circuits that thermistor forms.Two thermistors are placed in 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 by the temperature of two points of AD conversion regime sampling, intelligent controller 207 drives fan radiating when the temperature of one of them temperature sampling point surpasses its set point, when the temperature of two temperature sampling points was all in set point, intelligent controller 207 was closed down fan radiating.When any one temperature sampling value surpasses it during high set point; controller output control signal is controlled normally closed type output control relay 208 and is turn-offed the output of LED power supply; intelligent controller 207 is controlled sound and light alarm output unit 211 and is sent the high temperature alarm signal of setting simultaneously; high temperature appears in reminding user power supply changeover device inside; executed high temperature protection function, prevent that power supply changeover device from causing because internal temperature is too high damaging.
Automatically closing output select unit 212 is comprised of a function selection key 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 automatically to close output function, and LED light is lighted, and button is closed this function again, and LED light is extinguished.After selecting this function, intelligent controller 207 flows through the electric current of load current sampling resistor 204 by AD conversion operations real-time sampling, and execution power changes relatively and the timing operation.When bearing power greater than nominal load power 5% and surpass 12 hours bearing powers and be not any change, intelligent controller 207 output control signals, control normally closed type output control relay 208 and turn-off 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 are after carrying out and turn-offing output, and the user is again by the function selecting key of automatically closing output select unit 212, the output that can a key restores electricity, and illuminator starts fast.
When carrying out, the user closes while 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 by AD conversion operations real-time sampling, when intelligent controller 207 judgement bearing powers changed over programmed values, intelligent controller 207 was controlled sound and light alarm output units 211 and is sent the bearing power variation auditory tone cues of setting.
Fig. 3 is lamp body internal structure schematic diagram, the power supply changeover device output dc voltage provides constant-voltage DC source for LED light fixture 5, LED lamp pearl is as light emitting semiconductor device, its characteristic is that the constant current input requirements is high, for stablizing the luminous power of LED lamp pearl, extend its useful life, each LED light fixture 5 is built-in constant-current control circuit shown in Figure 3 all.LED light fixture input low-voltage dc power supply after low voltage difference rectification circuit 51, for electric current comparison controller 57 provides working power, and provides power supply for LED lamp pearl 56 luminous loops.the built-in auto-excitation type oscillator of electric current comparison controller 57, control electric current with fixed frequency and turn-off control end 58 break-makes, during conducting, electric current is through high-precision current sampling comparison resistance 52, LED lamp pearl 56, afterflow inductance 55, be conducting to the negative power end of rectification circuit 51 by electric current comparison controller 57 internal switch pipes, electric current comparison controller 57 compares high-precision current sampling comparison resistance 52 both end voltage 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 the characteristic of energy storage and prevention current break after cut-off current, form afterflow inductance 55, fly-wheel diode 53, high-precision current sampling comparison resistance 52, the current circuit of LED lamp pearl 56, the electric current of LED lamp pearl 56 keeps flowing through.The built-in oscillating circuit of electric current comparison controller 57 provides fixing frequency to carry out reciprocal electric current of make-and-break and turn-offs control end 58, realizes the Current Control of LED lamp pearl.Go ripple electric capacity 54 to play the effect that LED lamp pearl both end voltage is removed ripple,, to realize less current fluctuation, improve constant-current control accuracy.
The built-in high-accuracy and constant current control of LED light fixture drive circuit, to improve LED lamp pearl useful life, its rectification circuit adopts low voltage difference design, reduces the power supply heat waste.In a preferred embodiment of the present invention, built-in high-accuracy and constant current control drive circuit constant current output efficiency＞95%, constant current accuracy ± 1%.Power supply changeover device output low-voltage dc voltage must, lower than the highest standard to human body direct current safe voltage, can not too lowly hinder loss and take into account the built-in constant-current control circuit delivery efficiency of lamp body to reduce line simultaneously.In a preferred embodiment of the present invention, output dc voltage is 28V ± 1V.The present invention separates to reduce the lamp body heat radiation with high-voltage alternating conversion electric power part with lamp body, reduced the joint temperature of LED lamp pearl, extend the useful life of LED lamp pearl, can save shorter electrochemical capacitor of temperature influence life-span in lamp body, extended the useful life of light fixture.Miniwatt LED light illumination system is in the application of the LED lamp illuminating system more than 10, the supply power mode of relative lamp one a high pressure conversion electric power, manufacturing cost obviously reduces, in a preferred embodiment of the present invention, under existing element purchase cost condition, the system manufacturing cost reduces over 10%.
By above-mentioned description, the related personnel can under the condition of mentality of designing of the present invention and technical indicator appointment, change and revise.Technical scope of the present invention is not limited to the content on specification, must determine technical scope according to the claim scope.
Claims (2)
1. miniwatt LED light illumination system, its feature is being to comprise 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 described intelligent AC-DC power supply changeover device (2) is connected with AC power (1), the low-voltage direct output is connected with a plurality of LED light fixtures (5), each LED light fixture (5) and the low-voltage direct output that is used for after its lamp switch (4) of switching on/cutting off the power supply of control is connected being connected to intelligent AC-DC power supply changeover device (2) are set in mode parallel with one another between described a plurality of LED light fixtures (5); Described each LED light fixture (5) inside is provided with the high-accuracy and constant flow control circuit; Be connected by parallel cable (3) between described intelligent AC-DC power supply changeover device and lamp switch and LED light fixture;
Described intelligent AC-DC power supply changeover device (2) comprises that DC12V output (206), intelligent controller (207), 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) and automatically close output select unit (212); Low-voltage direct out-put supply module (205) comprises load current sampling resistor (204) and normally closed type output control relay (208);
Described rectification and EMI circuit (202) be connected to AC power (1) after described mains switch (201) is connected in series; Described 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), as the cathode output end of low-voltage direct out-put supply module (205), is connected in series the rear cathode output end as low-voltage direct out-put supply module (205) of load current sampling resistor (204) and normally closed type output control relay (208) successively on the low-voltage direct output negative pole end of power transfer module (203); The cathode output end of described 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 described power transfer module (203) is connected with described intelligent controller (207), described intelligent controller (207) is connected with load current sampling resistor (204), also with normally closed type output control relay (208), is connected; Described fan radiating control unit (209), bearing power account for rated output power than display unit (210), sound and light alarm output unit (211) and automatically close output select unit (212) and all with intelligent controller (207), be connected.
2. miniwatt LED light illumination system according to claim 1, it is characterized in that, the built-in high-accuracy and constant flow control circuit of described 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);
Described rectification circuit (51) is connected with the low-voltage direct output of described intelligent AC-DC power supply changeover device (2), the cathode output end of rectification circuit (51) divides three tunnels to connect: a road directly is connected on a sample rate current input of electric current comparison controller (57), another road is turn-offed control end and is connected by the sample electric current of comparison resistance (52), LED lamp pearl (56) and afterflow inductance (55) and electric current comparison controller (57) of high-precision current successively, then leads up to fly-wheel diode and be connected with the electric current shutoff control end of electric current comparison controller (57); Another sample rate current input of described electric current comparison controller (57) is connected between described high-precision current sampling comparison resistance (52) and 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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| CN102413609A CN102413609A (en) | 2012-04-11 |
| CN102413609B true CN102413609B (en) | 2013-11-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102821523A (en) | 2012-08-16 | 2012-12-12 | 浙江生辉照明有限公司 | LED (Light-Emitting Diode) lighting device and service life verification method thereof |
| CN107635310A (en) * | 2017-09-29 | 2018-01-26 | 无锡昊瑜节能环保设备有限公司 | A kind of regulator control system for plant illumination |
| CN107734744A (en) * | 2017-10-10 | 2018-02-23 | 上海泓语电气技术有限公司 | A kind of concentration DC power-supply system for underground pipe gallery LED lamp illumination |
| CN113825280B (en) * | 2021-11-23 | 2022-04-22 | 广州中大中鸣科技有限公司 | Long-distance electric energy distribution system fused with building texture and current calculation method |
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