CN101790268B - Light-emitting diode street lamp energy-saving automatic control method and device - Google Patents
Light-emitting diode street lamp energy-saving automatic control method and device Download PDFInfo
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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
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention relates to a light-emitting diode (LED) street lamp energy-saving automatic control method and device. The device comprises a power supply, an automatic control circuit and an LED light source, wherein the power supply is a flyback power supply containing an AC protection circuit, a common-mode rejection circuit, a rectifier filtering circuit and a constant pressure constant current circuit which are connected successively; the automatic control circuit comprises a clock circuit, a SCM circuit and a switch circuit which are connected successively; and the LED light source comprises an LED light source 1 and an LED light source 2 which are arranged in a chip in parallel, the cathode is directly connected with the negative electrode of the power supply, the anode is connected with the automatic control circuit; and the automatic control circuit periodically and automatically connects the positive electrode of the power supply with the anodes of the LED light source 1 and the LED light source 2 according to the illumination brightness demands of streets to ensure that the two LED light sources work at the same time, or periodically, automatically and separately connects the positive electrode of the power supply with the anode of the LED light source 1 or the LED light source 2 to ensure that the LED light source 1 or the LED light source 2 works. The invention solves the problems of saving the energy and prolonging the service life of the LED street lamp, and has the obvious advantages of simple structure, good illumination quality for streets and no illumination dark space.
Description
Technical field
The present invention relates to a kind of LED street lamp energy-saving automatic control method and device, belong to LED road lamp energy-saving automation field.
Background technology
At present, to LED street lamp energy-saving automatic control method and device, have two kinds basically: a kind of is through control LED street lamp size of current, promptly controls its power output size and realizes; When the dusk road stream of people, when vehicle flowrate is big, the road brightness of illumination needs to let LED street lamp power output more greatly when big; Be full power output, and to the late into the night, the road stream of people, vehicle flowrate hour; In the time of only need keeping the suitable brightness of illumination of road and get final product, make LED street lamp power output a little bit smaller, thereby reach energy-conservation purpose; Another kind is that two led light sources are set in a street lamp lampshade, and it is divided in two bulbs, and it is supplied power respectively, and in the time of at dusk, two led light sources are all bright, during the late into the night, only light one, and another small cup is not lighted.There are disadvantage in these two kinds of LED street lamp energy-saving automatic control methods and device: 1. the former has only solved the power saving of LED street lamp, does not prolong problem but solve LED street lamp working life; 2. the latter had both solved the power saving of LED street lamp, solved its working life again and prolonged problem, but its complex structure need be provided with two lamps on a lampshade, needed two led light source chips, and manufacturing cost is high, and also inconvenience is installed, and reliability is also poor; Next is that the road lighting quality is poor, lights when a lamp, and when another lamp did not work, there was the dark space shade in the road brightness of illumination.
Summary of the invention
For solving the deficiency that present LED street lamp energy-saving automatic control method and device exist; The present invention provides a kind of LED street lamp energy-saving automatic control method and device; Prolong problem its energy-conservation and useful life that has not only solved the LED street lamp, and it is simple in structure, and road brightness of illumination quality is good again.
The technical scheme that technical solution problem of the present invention is adopted is: on control method; A led light source chip is processed two parallel connections the loop is set; Form led light source one and led light source two, use a kind of flyback power supply, through automatic control circuit; Timing automatic is given led light source one and led light source two power supply respectively simultaneously, or alternating individual one of them led light source one or the led light source two given supplied power.
According to above-mentioned control mode, a kind of LED road lamp energy-saving automatic control equipment is set, this device is made up of power supply, automatic control circuit and led light source three parts.It is characterized in that: said power supply is a kind of flyback power supply, and it connects to form by exchanging protective circuit, common mode inhibition circuit, current rectifying and wave filtering circuit and constant pressure and flow circuit successively; Said automatic control circuit is connected to form by clock circuit, single chip circuit and switching circuit successively; Said led light source; Led light source one by parallel connection is provided with is formed with led light source two; The negative pole end of said power supply is connected with the cathode terminal of led light source one with led light source two respectively; And its positive terminal is connected with switching circuit in the automatic control circuit, is connected with led light source two anode taps with led light source one respectively through switch chip.
Said constant pressure and flow circuit; It is made up of transformer, the rectifying and voltage-stabilizing filter circuit that is connected with transformer secondary output coil two ends and the voltage negative feedback circuit that is connected to the pulse-width modulation circuit at transformer two ends and is connected to rectifying and voltage-stabilizing filter circuit positive and negative end, and the feedback signal output of voltage negative feedback circuit is connected with the signal input end of pulse-width modulation circuit.
The invention has the beneficial effects as follows: because of the loop of a led light source chip being processed two parallel connection settings forms led light source one and led light source two; Power supply or alternating individual one of them led light source of giving are supplied power respectively simultaneously to give two led light sources through the automatic control circuit timing automatic; The energy-conservation of led light source and the technical problem that prolongs its useful life had both been realized; Have simultaneously simple in structure, easily manufactured, saving cost again, and greatly improved the road lighting quality, when any one led light source is luminous therein; Road lighting brightness uniformity, without a licence light and shade district exists; The flyback power supply of light source use has been realized the constant pressure and flow power supply in addition, has improved the useful life of led light source chip from another aspect.
Description of drawings
Below in conjunction with accompanying drawing and embodiment, technical scheme of the present invention is described further.
Fig. 1 is a control method schematic diagram of the present invention.
Fig. 2 is a control device structure chart of the present invention.
Fig. 3 is a power circuit diagram of the present invention.
Fig. 4 is clock circuit and single chip circuit figure in the automatic control circuit of the present invention.
Fig. 5 is switching circuit and led light source circuit diagram in the automatic control circuit of the present invention.
Fig. 6 is the pulse voltage waveform figure with certain duty ratio that pulse-width modulation circuit of the present invention produced.
Fig. 7 is constant pressure and flow power supply figure of the present invention.
1. power supplys among the figure, 2. automatic control circuit, 3.LED light source, 31.LED light source one, 32.LED light source two; 11. the interchange protective circuit, 12. common mode inhibition circuit, 13. current rectifying and wave filtering circuits, 14. constant pressure and flow circuit, 141. transformers; 142. the rectifying and voltage-stabilizing filter circuit, 143. pulse-width modulation circuits, 144. voltage negative feedback circuits, 21. clock circuits; 22. single chip circuit, 231. switching circuits, one, 232. switching circuit, two, 233. switch chips.
Embodiment
Below in conjunction with accompanying drawing and embodiment, technical scheme of the present invention is elaborated.
LED street lamp energy-saving automatic control method of the present invention is as shown in Figure 1; The chip of a led light source (3) is processed loop (31) and (32) that two parallel connections are provided with; Form led light source one (31) and led light source two (32); Through automatic control circuit (2), power supply (1) timing automatic is added to respectively simultaneously on the positive pole of led light source one (31) and led light source two (32) then, it is worked simultaneously; Or on the alternating individual positive pole that is added to led light source one (31) or led light source two (32), make its one of alternating individual work.
According to above LED street lamp energy-saving automatic control method, design a kind of LED road lamp energy-saving automatic control equipment, as shown in Figure 2, this device is made up of power supply (1), automatic control circuit (2) and led light source (3) three parts.Power supply (1) is a kind of flyback power supply, and it connects to form by exchanging protective circuit (11), common mode inhibition circuit (12), current rectifying and wave filtering circuit (13) and constant pressure and flow circuit (14) successively; Automatic control circuit (2) is connected to form by clock circuit (21), single chip circuit (22) and switching circuit one (231), switching circuit two (232), the switch chip (233) of forming switching circuit (23) successively; The chip of led light source (3) is processed the loop that two parallel connections are provided with; Form independently led light source one (31) and led light source two (32); The negative pole end of power supply (1) directly is connected with the cathode terminal of led light source one (31) with led light source two (32) respectively; Its positive terminal then respectively with automatic control circuit in switching circuit one (231), switching circuit two (232) and switch chip (233) be connected, through switch chip (233) positive source is connected to led light source one (31) and led light source two (32) anode taps respectively.By the good power supply program of Circuit Design; According to road lighting brightness needs; Make switching circuit one (231) and switching circuit two (232) that switch chip (233) is opened or make switch chip (233) only open one group by single chip circuit (22) timing automatic; Give the anode supply of led light source one (31) and led light source two (32) respectively simultaneously, or give led light source one (31) or led light source two (32) anode supplies separately, make its work.
Said constant pressure and flow circuit (14); By transformer (141); The rectifying and voltage-stabilizing filter circuit (142) that is connected with transformer (141) secondary coil two ends; And pulse width modulation circuit (143) that is connected with transformer (141) primary coil two ends and voltage negative feedback circuit (144) composition that is connected with rectifying and voltage-stabilizing filter circuit (142) positive and negative end, the feedback signal output of voltage negative feedback circuit (144) is connected with pulse-width modulation circuit (143) signal input end.
Fig. 2 control device structure chart according to the present invention, practical implementation circuit such as Fig. 3, Fig. 4 and shown in Figure 5.Shown in Figure 3ly be the circuit diagram of power supply of the present invention (1), among the figure: said interchange protective circuit (11) is by capacitor C 11, fuse F
2Form with thermistor RT1.Capacitor C 11 across are used to suppress the interference of electrical network high frequency noise signal to power supply between AC power two inputs, and fuse F
2Then be serially connected in respectively among AC power two input circuits with thermistor RT1, the surge current and the long-term overload of load that are used for electrical network is caused are protected.
Said common mode inhibition circuit (12) is made up of common mode choke coil L1 and L2, the input of coil L1 and L2 respectively with exchange protective circuit (11) in fuse F
2Be connected with the end of thermistor RT1, be used for suppressing in-phase interference signal.
Said current rectifying and wave filtering circuit (13) is made up of rectifier bridge D2 and capacitor C 15, and the interchange input two ends of rectifier bridge D2 are connected respectively with the output of L2 with the middle common mode choke coil L1 of common mode inhibition circuit (12); The both positive and negative polarity of capacitor C 15 then is connected with cathode output end with the positive pole of rectifier bridge D2 respectively.
Said constant pressure and flow circuit (14) is made up of transformer T2 (141), rectifying and voltage-stabilizing filter circuit (142), pulse-width modulation circuit (143) and voltage negative feedback circuit (144).Transformer T2 (141) is made up of primary coil L3 and secondary coil L4 and L5; Primary coil L3 is transferred to secondary coil L4 and L5 with the high-frequency ac voltage that pulse-width modulation circuit (143) produces; Secondary coil L4 and current rectifying and wave filtering circuit (13) provide power supply for the VCC of the pulse width modulating chip U5 in the pulse-width modulation circuit (143) jointly, and secondary coil L5 is that rectifying and voltage-stabilizing filter circuit (142) provides power supply; Rectifying and voltage-stabilizing filter circuit (142) by voltage stabilizing didoe D3, and the π type filter circuit of forming by inductance coil L6 and capacitor C 13, C14 form, the model of voltage stabilizing didoe is MR860, its not only rectification but also voltage stabilizing; Pulse-width modulation circuit (143) mainly comprises pulse width modulating chip U5; Its model is LD7550BBN; With power switch pipe Q1, its model is 5N60C, pulse width modulating chip U5 output pin OUT through be connected with the control utmost point grid of power switch pipe Q1 after resistance R 12 is connected; The drain electrode of Q1 is connected with the end of the primary coil L3 of transformer T2 (141); The pulse voltage with certain duty ratio with pulse-width modulation circuit (143) produces is equivalent to the primary coil L3 that high-frequency alternating current is given transformer T2 (141), and the pulse voltage wave mode is as shown in Figure 6.The CS pin of U5 is connected with the end of the source electrode of Q1 and current sampling resistor R13, and when the voltage drop on the current sampling resistor R13 surpassed 0.85V, pulse width modulating chip U5 quit work automatically, plays overcurrent protection.The RT pin of U5 is connected with earth resistance R14, and resistance R 14 is used to regulate the frequency of oscillation of pulse width modulating chip U5; The RCD-R clamp circuit that resistance R 4, diode D4 and capacitor C 12 are formed is mainly used in and suppresses the caused drain voltage spike of transformer T2 (141) leakage inductance; Voltage negative feedback circuit (144) mainly comprise load current sampling resistor R5 and model be SC3094 switching tube Q2, and model be the photoelectric coupled device U4 of PC817.Load current sampling resistor R5 is serially connected in the negative loop of rectifying and voltage-stabilizing filter circuit (142), when rectifying and voltage-stabilizing filter circuit (142) voltage raises, flows through the electric current of load; That is the electric current that flows through load current sampling resistor R5 increases, and its pressure drop also increases, and then switching tube Q2 control base voltage increases and conducting; Pressure drop on its collector load resistor R11 also increases, and the electric current of photoelectric coupled device U4 output also increases, and it feeds back to, and pulse width modulating chip U5 input pin comp electric current also increases in the pulse-width modulation circuit (143); The voltage duty cycle of pulse-width modulation circuit (143) output is reduced; Be that high-frequency ac voltage reduces,, rectifying and voltage-stabilizing filter circuit (142) output voltage also reduced through transformer T2 (141); Thereby the electric current that flows through load is also reduced, it is stabilized in the setting scope; Otherwise when the voltage at rectifying and voltage-stabilizing filter circuit (142) two ends reduced, the electric current that promptly flows through load reduced; That is the electric current that flows through load current sampling resistor R5 reduces, when promptly its pressure drop also reduces, and then not conducting of switching tube Q2; Photoelectric coupled device U4 output current reduces, and then the voltage duty cycle of pulse-width modulation circuit (143) output increases, and promptly high-frequency ac voltage raises; Thereby the electric current that flows through load is increased; It is stabilized in the setting scope, thereby realizes load led light source one (31) and the power supply of led light source two (32) constant pressure and flows, as shown in Figure 7.R7 and D5 form the power supply indication.
Said automatic control circuit (2) is shown in Fig. 4, Fig. 5 (21), (22), (231), (232) and (233).Clock circuit (21) mainly comprises clock chip U3, and its model is DS1302, the external crystal oscillator chip of its X1 and X2 pin, and as oscillation source, its operating frequency is 32.768KHz.Clock chip U3 power pins VCC1 and the shared one+5V of single-chip microcomputer U2 power supply, the external 3V button cell of its power pins VCC2 also can operate as normal when preventing power down; Single-chip microcomputer U2, its model is STC89C51, its power supply VCC is supplied with after D1 rectification, U1 voltage stabilizing and capacitor C 2 and C3 filtering by transformer T1 transformation.For preventing that outside assorted letter from disturbing the external crystal oscillator chip oscillate source of its XTAL1 and XTAL2 pin.Pin P2.0, P2.1 and P2.2 are connected with RST, SCLK and the I/O pin of clock chip U3, to read the date information among the clock chip U3.Its output pin P0.6/AD6 is connected with CTRL2 with R20 one end CTRL1 with the preposition resistance R 17 of base stage of the middle switching circuit one (231) of switching circuit (23) and switching circuit two (232) middle switch triode Q3 and Q4 with P0.7/AD7; Switching circuit (23) mainly comprise models in switching circuit one (231) and the switching circuit two (232) be C1815 switch triode Q3 and Q4, to reach model be the switch chip U6 of IRF7103; U6 is a switch chip that has two groups of input pin S1G1 and S2G2, reaches two groups of output pin D1D1 and D2D2; Input and output simultaneously; Also input and output separately; S1 is connected with the positive pole of S2 pin with rectifying and voltage-stabilizing filter circuit (142), and G1 then is connected with the output of switching circuit one (231) with switching circuit two (232) middle switch triode Q3 and Q4 with the G2 pin.
The circuit of said led light source (3) is shown in Fig. 5 (31) and (32): light-emitting diode D10 in led light source (3) chip and D11 process loop (31) and (32) that two parallel connections are provided with; After being connected, the light-emitting diode D10 of two parallel connection settings and the negative electrode of D11 directly be connected with the negative pole of rectifying and voltage-stabilizing filter circuit (142); Its anode then is connected with D2D2 with two groups of output pin D1D1 of the middle switch chip U6 (233) of switching circuit (23) respectively, for it cathode power supply is provided by switch chip U6 (223).
More than implement circuit; Automatically control the program that requirement is provided with by the LED road lamp energy-saving; By the single-chip microcomputer U2 in the automatic control circuit (2) the date information in the clock circuit (21) that reads is discerned processing automatically; And result is exported by its output pin P0.6/AD6 and P0.7/AD7; When needs supplied power for led light source one (31) and led light source two (32) simultaneously, then P0.6/AD6 and P0.7/AD7 exported high level simultaneously, made switch triode Q3 and Q4 conducting simultaneously in switching circuit one (231) and the switching circuit two (232); Make (233) two groups of input pin S1G1 of switch chip U6 and S2G2 all obtain high level and conducting simultaneously; By its D1D1 and two groups of output pins of D2D2, the cathode power supply of the rectifying and voltage-stabilizing filter circuit (142) that will be connected with S2 with its input pin S1 is sent into the anode of led light source one (31) and led light source two (32) simultaneously, makes it simultaneously luminous.Otherwise; When only needing to supply power for led light source one (31) or led light source two (32) separately; Then single-chip microcomputer U2 has only one of P0.6/AD6 or P0.7/AD7 output high level separately; Switch triode Q3 or Q4 also have only one to obtain the high level conducting; (233) two groups of input pin S1G1 of switch chip U6 or S2G2 also have only one group to obtain the high level conducting, and its output pin also has only one group of D1D1 or D2D2 that the cathode power supply of rectifying and voltage-stabilizing filter circuit (142) is sent into the anode of led light source one (31) or led light source two (32), makes its work; And single-chip microcomputer U2 can make alternating individual connection led light source one (31) of automatic control circuit (2) and led light source two (32) according to the odd even day information that reads.
Claims (3)
1. LED street lamp energy-saving automatic control method; It is characterized in that: a led light source chip is processed two parallel connections the loop is set; Form led light source one and led light source two, use a kind of flyback power supply, through automatic control circuit; Timing automatic is given led light source one and led light source two power supply respectively simultaneously, or alternating individual one of them led light source one or the led light source two given supplied power; It instead swashs power supply and connects to form successively by exchanging protective circuit, common mode inhibition circuit, current rectifying and wave filtering circuit and constant pressure and flow circuit; Automatic control circuit by clock circuit, single chip circuit and form switching circuit switching circuit one, switching circuit two, switch chip, connect to form successively; According to road lighting brightness needs; Make switching circuit one, switching circuit two that switch chip is opened or make switch chip only open one group by the single chip circuit timing automatic; Give the anode supply of led light source one and led light source two respectively simultaneously; Or, make its work separately to the anode supply of led light source one and led light source two.
2. LED road lamp energy-saving automatic control equipment; Form by power supply, automatic control circuit and led light source three parts; It is characterized in that: said power supply is a kind of flyback power supply, and it connects to form by exchanging protective circuit, common mode inhibition circuit, current rectifying and wave filtering circuit and constant pressure and flow circuit successively; Said automatic control circuit is connected to form by clock circuit, single chip circuit and switching circuit successively; Said led light source; Led light source one by parallel connection is provided with is formed with led light source two; The negative pole end of said power supply is connected with the cathode terminal of led light source one with led light source two respectively; And its positive terminal is connected with switching circuit in the automatic control circuit, is connected with led light source two anode taps with led light source one respectively through switch chip.
3. a kind of LED road lamp energy-saving automatic control equipment according to claim 2; It is characterized in that: said constant pressure and flow circuit; Be made up of transformer, the rectifying and voltage-stabilizing filter circuit that is connected with transformer secondary output coil two ends and the voltage negative feedback circuit that is connected to the pulse-width modulation circuit at transformer two ends and is connected to rectifying and voltage-stabilizing filter circuit positive and negative end, the feedback signal output of voltage negative feedback circuit is connected with the signal input end of pulse-width modulation circuit.
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| CN2010101145565A CN101790268B (en) | 2010-02-26 | 2010-02-26 | Light-emitting diode street lamp energy-saving automatic control method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101932175B (en) * | 2010-08-31 | 2013-03-13 | 电子科技大学 | LED constant current driving circuit capable of dimming automatically |
| CN102355762B (en) * | 2011-06-18 | 2014-02-19 | 光宝电子(广州)有限公司 | LED light automation positioning synchronization method and apparatus thereof |
| CN102287719A (en) * | 2011-08-30 | 2011-12-21 | 江苏同辉照明科技有限公司 | Energy-saving road lamp |
| CN104968120A (en) * | 2015-07-13 | 2015-10-07 | 中能世华(北京)节能科技有限公司 | Street lamp energy-saving circuit control system |
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| US6600274B1 (en) * | 2001-12-14 | 2003-07-29 | Dme Corporation | LED current regulation circuit for aircraft lighting system |
| CN101106852A (en) * | 2007-06-25 | 2008-01-16 | 四川大学 | Current constant and light adjusting control circuit for luminescent LED array |
| CN201180927Y (en) * | 2008-04-14 | 2009-01-14 | 薛焕章 | Solar LED central control light source circuit |
| CN201218459Y (en) * | 2008-05-15 | 2009-04-08 | 陶钧炳 | Natural energy road lamp |
| CN201267026Y (en) * | 2008-10-06 | 2009-07-01 | 李春海 | Drive circuit of mixing light source |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6600274B1 (en) * | 2001-12-14 | 2003-07-29 | Dme Corporation | LED current regulation circuit for aircraft lighting system |
| CN101106852A (en) * | 2007-06-25 | 2008-01-16 | 四川大学 | Current constant and light adjusting control circuit for luminescent LED array |
| CN201180927Y (en) * | 2008-04-14 | 2009-01-14 | 薛焕章 | Solar LED central control light source circuit |
| CN201218459Y (en) * | 2008-05-15 | 2009-04-08 | 陶钧炳 | Natural energy road lamp |
| CN201267026Y (en) * | 2008-10-06 | 2009-07-01 | 李春海 | Drive circuit of mixing light source |
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Granted publication date: 20121212 Termination date: 20160226 |