CN102118912B - A kind of LED streetlamp power source circuit - Google Patents
A kind of LED streetlamp power source circuit Download PDFInfo
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- CN102118912B CN102118912B CN201110086054.0A CN201110086054A CN102118912B CN 102118912 B CN102118912 B CN 102118912B CN 201110086054 A CN201110086054 A CN 201110086054A CN 102118912 B CN102118912 B CN 102118912B
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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
- Y02B20/72—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps in street lighting
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Abstract
The present invention discloses a kind of LED streetlamp power source circuit, it comprises the ac power input end (1) be linked in sequence, power switch circuit (2), output control circuit (3) and LED illumination lamp group (4), wherein said power switch circuit (2) comprises the EMI filter circuit (201) be linked in sequence, circuit of power factor correction (202), transformer (203) and current rectifying and wave filtering circuit (204), described circuit of power factor correction (202) is also connected with standby power circuit (205), described standby power circuit (205) is connected with automatic light control switch lamp control circuit (209), described transformer (203) is also connected with controller (206), described controller (206) is connected with automatic brightness regulation circuit (207) and photoelectrical coupler control loop (208), CC/CV control circuit (301) is provided with in described output control circuit (3), the present invention effectively improves the optical attenuation phenomenon of LED illumination lamp group (4).
Description
Technical field
The present invention relates to power circuit field, relate to a kind of LED streetlamp power source circuit in particular.
Background technology
Because LED street lamp has the advantage of high energy-conservation, long-life and environmental protection, be belong to typical green illumination light source, the demonstration project of LED street lamp is all over the world all in like a raging fire carrying out now.
But as an emerging industry, LED street lamp industry still also exists a very serious problem simultaneously: LED street lamp is when working long hours, owing to there is no corresponding adjusting device, regulate the brightness of LED street lamp, LED street lamp temperature will be caused very high, the too high meeting of temperature of LED street lamp causes optical attenuation, even may cause the generation of dead lamp phenomenon time serious.
Summary of the invention
In order to solve above-mentioned Problems existing, the object of this invention is to provide a kind of can intelligent switch and there is the LED streetlamp power source circuit of anti-dead lamp function.
To achieve these goals, the present invention is by the following technical solutions:
A kind of LED streetlamp power source circuit, it comprises the ac power input end (1) be linked in sequence, power switch circuit (2), output control circuit (3) and LED illumination lamp group (4), wherein said power switch circuit (2) comprises the EMI filter circuit (201) be linked in sequence, circuit of power factor correction (202), transformer (203) and current rectifying and wave filtering circuit (204), described circuit of power factor correction (202) is also connected with standby power circuit (205), described standby power circuit (205) is connected with automatic light control switch lamp control circuit (209), described transformer (203) is also connected with controller (206), described controller (206) is connected with automatic brightness regulation circuit (207) and photoelectrical coupler control loop (208), CC/CV control circuit (301) is provided with in described output control circuit (3), described CC/CV control circuit (301) is connected with the output of power switch circuit (2), described CC/CV control circuit (301) is also connected to output voltage regulator (SRV) and output current adjuster (SRC).
Preferably, described controller (206) is integral type integrated manipulator, is wherein integrated with pfc controller and PWM controller.
Preferably, described circuit of power factor correction (202) comprises inductance (1L2), switching tube (1Q1), rectifying tube (1D1) and filter capacitor (1E1).
Preferably, described automatic brightness regulation circuit (207) comprises thermistor (RT2), photoelectrical coupler (2U1) and photoelectrical coupler (3U2).
Preferably, described thermistor (RT2) is negative tempperature coefficient thermistor.
Preferably, described automatic light control switch lamp control circuit (209) comprises photo resistance (GR), photoelectrical coupler (2U1) and photoelectrical coupler (3U2).
Preferably, described photo resistance (GR) is negative temperature coefficient photo resistance.
The present invention adopts unique circuit structure design, achieve the object of dynamical LED streetlamp power source management, by arranging automatic brightness regulation circuit (207), because the brightness of LED illumination lamp group (4) is larger, its temperature is also higher, the two becomes positive relationship, so the current state of LED illumination lamp group (4) can be detected according to the temperature of LED illumination lamp group (4), thus automatically regulate its brightness, make the temperature held stationary of LED illumination lamp group (4), can not be too high, keep again the brightness of LED illumination lamp group (4) simultaneously, effectively can improve the optical attenuation phenomenon of LED illumination lamp group (4).
The present invention is simultaneously by automatic light control switch lamp control circuit (209), and control the Kai Heguan of LED street lamp according to the Strength Changes signal of light, realize nobody and hold the intelligentized control method of keeping, realize darkness and turn on light, daybreak turns off the light.
Accompanying drawing explanation
Fig. 1 is principle schematic of the present invention;
Fig. 2 is the part circuit structure diagram of power switch circuit in the present invention;
Fig. 3 is the circuit structure diagram of current rectifying and wave filtering circuit in the present invention;
The circuit structure diagram of Fig. 4 to be this be middle automatic light control switch lamp control circuit;
Fig. 5 is the circuit structure diagram of automatic brightness regulation circuit in the present invention
Fig. 6 is the circuit structure diagram of output control circuit in the present invention.
1. ac power input ends, 2. power switch circuit in figure, 201.EMI filter circuit, 202. circuit of power factor correction, 203. transformers, 204. current rectifying and wave filtering circuits, 205. standby power circuit, 206. controllers, 207. automatic brightness regulation circuits, 208. photoelectrical coupler control loops, 209. automatic light control switch lamp control circuits, 3. output control circuit, 301.CC/CV control circuit, 4.LED lighting lamp group.
Embodiment
Below in conjunction with drawings and the specific embodiments the present invention made and further describe explanation in detail.
As shown in Figures 1 to 6, for a kind of embodiment of the present invention, a kind of LED streetlamp power source circuit, it comprises the ac power input end 1 be linked in sequence, power switch circuit 2, output control circuit 3 and LED illumination lamp group 4, wherein said power switch circuit 2 comprises the EMI filter circuit 201 be linked in sequence, circuit of power factor correction 202, transformer 203 and current rectifying and wave filtering circuit 204, wherein circuit of power factor correction 202 is also connected with standby power circuit 205, described standby power circuit 205 is connected with automatic light control switch lamp control circuit 209, the input of automatic light control switch lamp control circuit 209 is connected with standby power circuit 205, the output of automatic light control switch lamp control circuit 209 is connected with a controller 206 by photoelectrical coupler control loop 208, transformer 203 also controller 206 is connected, its middle controller 206 is connected with automatic brightness regulation circuit 207, wherein be provided with CC/CV control circuit 301 in output control circuit 3, CC/CV control circuit 301 is connected with the output of power switch circuit 2, CC/CV control circuit 301 is also connected with output voltage regulator SRV and output current adjuster SRC, by the size of regulation output voltage that output voltage regulator SRV can be manual, by the size of regulation output electric current that output current adjuster SRC can be manual.
Controller 206 in LED streetlamp power source circuit is integrated form controller; wherein be integrated with pfc controller and PWM controller; unique integrated design; make it have higher performance, and comprehensive defencive function can be provided, can component number be reduced simultaneously; simplified design and reduction material cost; make its quiescent dissipation≤0.5W, power factor correction value >=0.90, average efficiency >=0.90.
Circuit of power factor correction 202 comprises inductance 1L2, switching tube 1Q1, rectifying tube 1D1 and filter capacitor 1E1, the raising electric power utilance of the effect that circuit of power factor correction 202 is passable, energy-conserving and environment-protective, make effective output of electric power be improved, thus make LED illumination lamp group 4 more energy-conservation.
Automatic brightness regulation circuit 207 comprises negative tempperature coefficient thermistor RT2, photoelectrical coupler 3U2 and photoelectrical coupler 2U1, because the brightness of LED illumination lamp group 4 is larger, its temperature is also higher, the two becomes positive relationship, so the current state of LED illumination lamp group 4 can be detected according to the temperature of LED illumination lamp group 4, thus regulate its brightness, make the temperature held stationary of LED illumination lamp group 4, can not be too high, keep again the brightness of LED illumination lamp group 4 simultaneously, effective optical attenuation phenomenon improving LED street lamp, its detailed process is: when negative tempperature coefficient thermistor RT2 detects that the temperature of LED illumination lamp group 4 is too high time, the resistance of negative tempperature coefficient thermistor RT2 will reduce, when temperature reaches set point, voltage comparator 3U2B output low level, Current Control point CR1 point current potential is reduced, the reference voltage of signal amplifier 2U1A is caused to reduce by one grade, signal amplifier 2U1A outputs signal to photoelectrical coupler 1U2A and feeds back to PWM controller 1U1 by photoelectrical coupler 1U2B, the pwm signal that PWM controller 1U1 exports diminishes, output current is made to diminish one grade, thus make the brightness step-down of LED illumination lamp group 4, extend the useful life of LED illumination lamp group 4, when temperature drops to particular value time, negative tempperature coefficient thermistor RT2 can detect again the signal of the temperature step-down of LED illumination lamp group 4, just can automatically regulate again, the brightness of LED illumination lamp group 4 is brightened.Automatic light control switch lamp control circuit 209 comprises negative temperature coefficient photo resistance GR, photoelectrical coupler 3U2 and photoelectrical coupler 2U1, in time arriving night, negative temperature coefficient photo resistance GR detects the signal that luminosity dies down, the resistance of negative temperature coefficient photo resistance GR just becomes large, make photoelectrical coupler 3U2D output low level, just have electric current in photoelectrical coupler 3U3A to pass through, make photoelectrical coupler 3U3B conducting, thus triode 3Q1 conducting, recover the power supply of PWM controller 1U1, such PWM controller 1U1 just starts to rework, LED is lighted automatically, when the past at night by daybreak time, negative temperature coefficient photo resistance GR will detect the signal of luminosity grow, the resistance of negative temperature coefficient photo resistance GR will diminish, photoelectrical coupler 3U2D is made to export high level, photoelectrical coupler 3U3A will end, no current passes through, photoelectrical coupler 3U3B and triode 3Q1 is caused to end, cause the power failure of PWM controller 1U1, PWM controller 1U1 quits work, Non voltage output, LED illumination lamp group 4 automatic distinguishing, automatic light control switch lamp control circuit 209 controls the Kai Heguan of LED illumination lamp group 4 according to the change of the intensity of light, realize nobody and hold the intelligentized control method of keeping, realize darkness to turn on light, daybreak turns off the light, effectively can save electric energy.
The above is only the preferred embodiment of the present invention; it should be pointed out that to those skilled in the art, without departing from the concept of the premise of the invention; can also make some Variations similar and improvement, these also should be considered as within protection scope of the present invention.
Claims (5)
1. a LED streetlamp power source circuit, it comprises the ac power input end (1), power switch circuit (2), output control circuit (3) and the LED illumination lamp group (4) that are linked in sequence, it is characterized in that, described power switch circuit (2) comprises the EMI filter circuit (201), circuit of power factor correction (202), transformer (203) and the current rectifying and wave filtering circuit (204) that are linked in sequence
Described circuit of power factor correction (202) is also connected with standby power circuit (205), and described standby power circuit (205) is connected with automatic light control switch lamp control circuit (209),
Described transformer (203) is also connected with controller (206), and described controller (206) is connected with automatic brightness regulation circuit (207) and photoelectrical coupler control loop (208),
The input of automatic light control switch lamp control circuit (209) is connected with standby power circuit (205), the output of automatic light control switch lamp control circuit (209) is connected with a controller (206) by photoelectrical coupler control loop (208)
CC/CV control circuit (301) is provided with in described output control circuit (3), described CC/CV control circuit (301) is connected with the output of power switch circuit (2), described CC/CV control circuit (301) is also connected to output voltage regulator (SRV) and output current adjuster (SRC), by the size of regulation output voltage that output voltage regulator (SRV) can be manual, by the size of regulation output electric current that output current adjuster (SRC) can be manual
Described automatic brightness regulation circuit (207) comprises thermistor (RT2), the first photoelectrical coupler (2U1) and the second photoelectrical coupler (3U2), when negative tempperature coefficient thermistor (RT2) detects that the temperature of LED illumination lamp group (4) is too high time, the resistance of negative tempperature coefficient thermistor (RT2) will reduce, when temperature reaches set point, voltage comparator (3U2B) output low level, make Current Control point (CR1) put current potential to reduce, the reference voltage of signal amplifier (2U1A) is caused to reduce by one grade, signal amplifier (2U1A) outputs signal to the 3rd photoelectrical coupler (1U2A), and feed back to PWM controller (1U1) by the 4th photoelectrical coupler (1U2B), the pwm signal that PWM controller (1U1) exports diminishes, output current is made to diminish one grade, thus make the brightness step-down of LED illumination lamp group (4), extend the useful life of LED illumination lamp group (4), when temperature drops to particular value time, negative tempperature coefficient thermistor (RT2) can detect again the signal of the temperature step-down of LED illumination lamp group (4), just automatically can regulate again, the brightness of LED illumination lamp group (4) is brightened,
Described automatic light control switch lamp control circuit (209) comprises photo resistance (GR), first photoelectrical coupler (2U1) and the second photoelectrical coupler (3U2), in time arriving night, negative temperature coefficient photo resistance (GR) detects the signal that luminosity dies down, the resistance of negative temperature coefficient photo resistance (GR) just becomes large, make the 5th photoelectrical coupler (3U2D) output low level, just have electric current in 6th photoelectrical coupler (3U3A) to pass through, make the 7th photoelectrical coupler (3U3B) conducting, thus triode (3Q1) conducting, recover the power supply of PWM controller (1U1), such PWM controller (1U1) just starts to rework, LED is lighted automatically, when the past at night by daybreak time, negative temperature coefficient photo resistance (GR) will detect the signal of luminosity grow, the resistance of photo resistance (GR) will diminish, the 5th photoelectrical coupler (3U2D) is made to export high level, 6th photoelectrical coupler (3U3A) will end, no current passes through, cause the 7th photoelectrical coupler (3U3B) and triode (3Q1) cut-off, cause the power failure of PWM controller (1U1), PWM controller (1U1) quits work, Non voltage output, LED illumination lamp group (4) automatic distinguishing, automatic light control switch lamp control circuit (209) controls the Kai Heguan of LED illumination lamp group (4) according to the change of the intensity of light.
2. a kind of LED streetlamp power source circuit according to claim 1, is characterized in that, described controller (206) is integral type integrated manipulator, is wherein integrated with pfc controller and PWM controller.
3. a kind of LED streetlamp power source circuit according to claim 2, it is characterized in that, described circuit of power factor correction (202) is made up of inductance (1L2), switching tube (1Q1), rectifying tube (1D1) and filter capacitor (1E1).
4. a kind of LED streetlamp power source circuit according to claim 3, is characterized in that, described thermistor (RT2) is negative tempperature coefficient thermistor.
5. a kind of LED streetlamp power source circuit according to claim 4, is characterized in that, described photo resistance (GR) is negative temperature coefficient photo resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110086054.0A CN102118912B (en) | 2011-04-02 | 2011-04-02 | A kind of LED streetlamp power source circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110086054.0A CN102118912B (en) | 2011-04-02 | 2011-04-02 | A kind of LED streetlamp power source circuit |
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| CN102118912A CN102118912A (en) | 2011-07-06 |
| CN102118912B true CN102118912B (en) | 2016-03-30 |
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| CN201110086054.0A Active CN102118912B (en) | 2011-04-02 | 2011-04-02 | A kind of LED streetlamp power source circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105825807B (en) * | 2016-05-30 | 2018-08-28 | 河南通达多媒体制作有限公司 | A kind of full color LED display system |
| CN106851944B (en) * | 2017-03-23 | 2023-04-18 | 成都零一智慧科技有限公司 | Intelligent light control system |
| CN107592711A (en) * | 2017-08-24 | 2018-01-16 | 浙江工贸职业技术学院 | A kind of intelligent electrical controller |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101677482A (en) * | 2008-09-17 | 2010-03-24 | 深圳市斯派克光电科技有限公司 | Control circuit of intellectualized LED street lamp |
| CN101909391A (en) * | 2010-08-10 | 2010-12-08 | 浙江大学 | Phase-controlled dimming LED drive and driving method thereof |
| CN201674699U (en) * | 2009-05-14 | 2010-12-15 | 浙江西子光电科技有限公司 | Driving power supply for LED street lamps |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7906917B2 (en) * | 2004-10-27 | 2011-03-15 | Koninklijke Philips Electronics N.V. | Startup flicker suppression in a dimmable LED power supply |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101677482A (en) * | 2008-09-17 | 2010-03-24 | 深圳市斯派克光电科技有限公司 | Control circuit of intellectualized LED street lamp |
| CN201674699U (en) * | 2009-05-14 | 2010-12-15 | 浙江西子光电科技有限公司 | Driving power supply for LED street lamps |
| CN101909391A (en) * | 2010-08-10 | 2010-12-08 | 浙江大学 | Phase-controlled dimming LED drive and driving method thereof |
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