CN101754537A - Driving power supply for high-power LED street lamp - Google Patents
Driving power supply for high-power LED street lamp Download PDFInfo
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- CN101754537A CN101754537A CN201010105417A CN201010105417A CN101754537A CN 101754537 A CN101754537 A CN 101754537A CN 201010105417 A CN201010105417 A CN 201010105417A CN 201010105417 A CN201010105417 A CN 201010105417A CN 101754537 A CN101754537 A CN 101754537A
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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 invention discloses a driving power supply for a high-power LED street lamp, which comprises a power supply input end, an EMI filtering unit, a rectifying and filtering unit, an active power factor correction unit, a flyback DC/DC conversion unit, an output unit, an auxiliary power supply 1, an auxiliary power supply 2, an APFC control unit, a flyback control unit, an optical coupling isolation unit and a feedback control unit. The feedback control unit comprises a voltage limiting feedback circuit, a current error amplifying circuit and a voltage reference circuit and provides the feedback signal according to the output current and output voltage. The output power of the driving power supply can reach 100W, the power factor is greater than 0.95, and the precision of the output current under the condition of quantity production is controlled within 2% through tolerance distribution. The invention effectively solves the problems of small power of driving power supply of the traditional LED, low power factor and large dispersibility of output current under the condition of batch production.
Description
Technical field
The present invention relates to the constant-current driving power supply of LED street lamp in a kind of 100W of being used for power bracket.
Background technology
Under the serious all the more background of world's energy scarcity, LED is efficient with it, long-life, characteristics such as pollution-free, is regarded as substituting the perfect light source of conventional lamp, city illumination wherein, and promptly street lamp is the important applied field of LED.For the LED street lamp, it is different from traditional street lamp, can not directly drive with the civil power of alternation, and needs constant drive current, and the fluctuation of drive current can have influence on the life-span of LED greatly, so just needs the special constant-current driving power supply of design.Yet existing driving power adopts resistance-capacitance depressurization, Buck or inverse-excitation converting circuit to realize mostly behind rectification circuit, often have in this case that power output is little, power factor is low, the dispersed problem such as big of output current when producing in batches, these problems have restricted the promotion and application of LED street lamp.
Summary of the invention
LED driving power power is little in the prior art, power factor (PF) is low in order to solve in the present invention, the dispersed big problem of output current under the mass production environment, the invention provides a kind of driving power supply for high-power LED street lamp.
The technical scheme that problem adopted that the present invention solves the prior art existence is: a kind of driving power supply for high-power LED street lamp is provided, and described driving power supply for high-power LED street lamp is made up of power input, EMI filter unit, rectification filtering unit, active power factor correcting unit, anti-sharp DC/DC converting unit, output unit, accessory power supply 1, accessory power supply 2, APFC control unit, anti-sharp control unit, light-coupled isolation unit and feedback control unit.
Described power input is made up of the fuse F1 that is used for open circuit when the short circuit, negative tempperature coefficient thermistor NTC1, the piezo-resistance RV1 that is used to absorb the energy that surge that electrical network brings or impulse train disturb of surge current when being used to suppress to start.
Described EMI filter unit is made up of X safety capacitor C X1, common mode inhibition choke T1 and Y safety capacitor C Y1, CY2; Described rectification filtering unit is made up of rectifier bridge and filter capacitor; Described active power factor correcting unit adopts the Boost topological structure, is made up of an inductance, a MOSFET, a current sampling resistor and two filter capacitors.
Described anti-sharp DC/DC converting unit is made up of anti-violent change depressor T2, switching tube Q3, current sampling resistor R11, secondary commutation circuit and a RCD buffer circuit, and wherein the RCD buffer circuit is made up of diode D4, capacitor C 2 and resistance R 1; Described anti-sharp DC/DC change-over circuit is operated under the continuous current pattern, satiable inductor L3 of series connection on rectifier diode D2.
Described output unit is made up of filter capacitor C9, C10 and output current sampling resistor R10, and the tolerance limits of described output current sampling resistor R10 is 1%; Described accessory power supply 1 obtains energy from the auxiliary winding of the 3rd end of anti-violent change depressor T2, by rectification, be filtered into the anti-control unit power supply that swashs.
Described accessory power supply 2 obtains energy from output, forms by resistance R 4, R8, R14, capacitor C 11, C12, triode Q2 and voltage stabilizing didoe D5, and be the feedback control unit power supply.
Described APFC control unit is made up of APFC control special chip and peripheral circuit thereof, and it provides drive signal to the MOSFET of active power factor correcting unit; The power supply of APFC control unit is provided by anti-sharp control unit.
Described anti-sharp control unit is formed by instead swashing control special chip and peripheral circuit thereof, and it has accessory power supply 1 power supply, by light-coupled isolation unit acquisition feedback signal, for the switching tube that instead swashs the DC/DC converting unit provides drive signal.
Described feedback control unit comprises the pressure limiting feedback circuit, current error amplifying circuit and voltage reference circuit three parts, wherein voltage reference circuit is made up of controlled voltage-stabiliser tube U5 of three ends and peripheral circuit thereof, its output is one and is used to produce the relatively follow circuit of the reference voltage of usefulness, the pressure limiting feedback circuit is by voltage stabilizing didoe D8 and resistance R 15, R16, R18 forms, the current error amplifying circuit is a PI governing loop, it be input as voltage and reference voltage on the output current sampling resistor R10, the output stack of its output and pressure limiting feedback forms feedback signal, the resistance R 31 in the feedback control unit, the R34 tolerance limits is 0.1%.
Described light-coupled isolation unit is made up of a precision photoelectric coupler, and the feedback signal that feedback control unit is provided passes to the anti-control unit that swashs.
Beneficial technical effects of the present invention is: driving power power output of the present invention can reach 100W, power factor (PF) is greater than 0.95, can realize under the mass production environment output current precision in 2% by Tolerance Allocation, it efficiently solves, and existing LED driving power power is little, power factor (PF) is low, the dispersed big problem of output current under the mass production environment.
Description of drawings
Fig. 1 is the overall structure schematic diagram of driving power supply for high-power LED street lamp of the present invention;
Fig. 2 is the circuit theory diagrams of input unit and EMI filter unit;
Fig. 3 is the circuit theory diagrams that instead swash the DC/DC converting unit;
Fig. 4 is the circuit theory diagrams of accessory power supply 2;
Fig. 5 is the circuit theory diagrams of feedback control circuit.
Embodiment
Below in conjunction with drawings and the specific embodiments the present invention is elaborated.
Referring to Fig. 1, driving power supply for high-power LED street lamp is made up of power input, EMI filter unit, rectification filtering unit, active power factor correcting unit, anti-sharp DC/DC converting unit, output unit, accessory power supply 1, accessory power supply 2, APFC control unit, anti-sharp control unit, light-coupled isolation unit and feedback control unit.Described power input is made up of fuse F1, negative tempperature coefficient thermistor NTC1, piezo-resistance RV1, fuse F1 is used for open circuit when short circuit, surge current when negative tempperature coefficient thermistor NTC1 can suppress to start, piezo-resistance RV1 are used to absorb the energy that surge that electrical network brings or impulse train disturb; Described EMI filter unit is made up of X safety capacitor C X1, common mode inhibition choke T1 and Y safety capacitor C Y1, CY2; Described rectification filtering unit is made up of rectifier bridge and filter capacitor; Described active power factor correcting unit adopts the Boost topological structure, is made up of an inductance, a MOSFET, a current sampling resistor and two filter capacitors; Described anti-sharp DC/DC converting unit is made up of anti-violent change depressor T2, switching tube Q3, current sampling resistor R11, secondary commutation circuit and a RCD buffer circuit, and wherein the RCD buffer circuit is made up of diode D4, capacitor C 2 and resistance R 1; Described output unit is made up of filter capacitor C9, C10 and output current sampling resistor R10; Described accessory power supply 1 obtains energy from the auxiliary winding of the 3rd end of anti-violent change depressor T2, by rectification, be filtered into the anti-control unit power supply that swashs; Described accessory power supply 2 obtains energy from output, forms by resistance R 4, R8, R14, capacitor C 11, C12, triode Q2 and voltage stabilizing didoe D5, and be the feedback control unit power supply; Described APFC control unit is made up of APFC control special chip and peripheral circuit thereof, and it provides drive signal to the MOSFET of active power factor correcting unit, to improve the input power factor of power supply of the present invention; Described anti-sharp control unit is formed by instead swashing control special chip and peripheral circuit thereof, and it has accessory power supply 1 power supply, by light-coupled isolation unit acquisition feedback signal, for the switching tube that instead swashs the DC/DC converting unit provides drive signal; Described light-coupled isolation unit is made up of a precision photoelectric coupler, and the feedback signal that feedback control unit is provided passes to the anti-control unit that swashs; Described feedback control unit comprises the pressure limiting feedback circuit; current error amplifying circuit and voltage reference circuit three parts; wherein voltage reference circuit is made up of controlled voltage-stabiliser tube U5 of three ends and peripheral circuit thereof; its output is a follow circuit; be used to produce the relatively reference voltage of usefulness; the pressure limiting feedback circuit is by voltage stabilizing didoe D8 and resistance R 15; R16; R18 forms; be used to limit output voltage and under idle condition, protect power supply; the current error amplifying circuit is a PI governing loop; it be input as voltage and reference voltage on the output current sampling resistor R10, the output stack of its output and pressure limiting feedback forms feedback signal.In the present embodiment, the APFC special integrated circuit can be selected MC33260 for use, instead swashs control chip and can select NCP1230 for use, and photoelectrical coupler can be selected EL817 for use, and the controlled voltage-stabiliser tube U5 of three ends can select LM431SC for use.
The consistency of output current when producing in batches for assurance, to carry out Tolerance Allocation and control for the key element parameter that influences output current characteristic, specifically, output current sampling resistor R10 tolerance need be controlled in 1%, resistance R 31, R34 tolerance in the voltage reference circuit need be limited in 0.1%, so just can guarantee that the output current ERROR CONTROL realizes good output current consistency in 2% when producing in enormous quantities.
For realizing power output up to 100W, anti-sharp DC/DC change-over circuit is operated under the continuous current pattern, its secondary rectifier diode D2 needs to turn-off by force like this, for suppressing its reverse recovery current to reduce the power consumption of primary switch pipe Q3, rectifier diode D2 need select short model reverse recovery time for use, and the satiable inductor L3 that connects with it.In the present embodiment, rectifier diode D2 can select 8ETH06 for use, and satiable inductor adopts the ultracrystallite magnetic core to make.
In addition, in the present embodiment, the power supply of APFC control unit is provided by anti-sharp control unit, when faults such as generation output zero load, short circuit, instead swashs control unit and can also close the APFC control unit to reduce power consumption when closing self like this.
Above content be in conjunction with concrete optimal technical scheme to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. driving power supply for high-power LED street lamp is characterized in that: described driving power supply for high-power LED street lamp by power input, EMI filter unit, rectification filtering unit, active power factor correcting unit, instead swash DC/DC converting unit, output unit, accessory power supply 1, accessory power supply 2, APFC control unit, instead swash control unit, light-coupled isolation unit and feedback control unit and form.
2. driving power supply for high-power LED street lamp according to claim 1 is characterized in that: described power input is made up of the fuse F1 that is used for open circuit when the short circuit, negative tempperature coefficient thermistor NTC1, the piezo-resistance RV1 that is used to absorb the energy that surge that electrical network brings or impulse train disturb of surge current when being used to suppress to start.
3. driving power supply for high-power LED street lamp according to claim 1 is characterized in that: described EMI filter unit is made up of X safety capacitor C X1, common mode inhibition choke T1 and Y safety capacitor C Y1, CY2; Described rectification filtering unit is made up of rectifier bridge and filter capacitor; Described active power factor correcting unit adopts the Boost topological structure, is made up of an inductance, a MOSFET, a current sampling resistor and two filter capacitors.
4. driving power supply for high-power LED street lamp according to claim 3, it is characterized in that: described anti-sharp DC/DC converting unit is made up of anti-violent change depressor T2, switching tube Q3, current sampling resistor R11, secondary commutation circuit and a RCD buffer circuit, and wherein the RCD buffer circuit is made up of diode D4, capacitor C 2 and resistance R 1; Described anti-sharp DC/DC change-over circuit is operated under the continuous current pattern, satiable inductor L3 of series connection on rectifier diode D2.
5. driving power supply for high-power LED street lamp according to claim 1 is characterized in that: described output unit is made up of filter capacitor C9, C10 and output current sampling resistor R10, and the tolerance limits of described output current sampling resistor R10 is 1%; Described accessory power supply 1 obtains energy from the auxiliary winding of the 3rd end of anti-violent change depressor T2, by rectification, be filtered into the anti-control unit power supply that swashs.
6. driving power supply for high-power LED street lamp according to claim 1, it is characterized in that: described accessory power supply 2 obtains energy from output, form by resistance R 4, R8, R14, capacitor C 11, C12, triode Q2 and voltage stabilizing didoe D5, be the feedback control unit power supply.
7. driving power supply for high-power LED street lamp according to claim 1 is characterized in that: described APFC control unit is made up of APFC control special chip and peripheral circuit thereof, and it provides drive signal to the MOSFET of active power factor correcting unit; The power supply of APFC control unit is provided by anti-sharp control unit.
8. driving power supply for high-power LED street lamp according to claim 1, it is characterized in that: described anti-sharp control unit is made up of anti-sharp control special chip and peripheral circuit thereof, it has accessory power supply 1 power supply, obtain feedback signal by the light-coupled isolation unit, for the anti-switching tube that swashs the DC/DC converting unit provides drive signal.
9. driving power supply for high-power LED street lamp according to claim 1, it is characterized in that: described feedback control unit comprises the pressure limiting feedback circuit, current error amplifying circuit and voltage reference circuit three parts, wherein voltage reference circuit is made up of controlled voltage-stabiliser tube U5 of three ends and peripheral circuit thereof, its output is one and is used to produce the relatively follow circuit of the reference voltage of usefulness, the pressure limiting feedback circuit is by voltage stabilizing didoe D8 and resistance R 15, R16, R18 forms, the current error amplifying circuit is a PI governing loop, it be input as voltage and reference voltage on the output current sampling resistor R10, the output stack of its output and pressure limiting feedback forms feedback signal, the resistance R 31 in the feedback control unit, the R34 tolerance limits is 0.1%.
10. driving power supply for high-power LED street lamp according to claim 1 is characterized in that: described light-coupled isolation unit is made up of a precision photoelectric coupler, and the feedback signal that feedback control unit is provided passes to the anti-control unit that swashs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201010105417A CN101754537A (en) | 2010-02-02 | 2010-02-02 | Driving power supply for high-power LED street lamp |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010105417A CN101754537A (en) | 2010-02-02 | 2010-02-02 | Driving power supply for high-power LED street lamp |
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| CN101754537A true CN101754537A (en) | 2010-06-23 |
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| CN201010105417A Pending CN101754537A (en) | 2010-02-02 | 2010-02-02 | Driving power supply for high-power LED street lamp |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101969727A (en) * | 2010-10-30 | 2011-02-09 | 陈金明 | High power LED driving power supply |
| CN101969725A (en) * | 2010-10-11 | 2011-02-09 | 复旦大学 | Intelligent general light-emitting diode (LED) street lamp illuminating power supply system |
| CN102098843A (en) * | 2011-01-13 | 2011-06-15 | 浙江大学 | LED driving circuit with high accuracy and low power consumption |
| CN102148946A (en) * | 2010-12-27 | 2011-08-10 | 东莞市乐科电子有限公司 | LED (light-emitting diode) television power circuit |
| CN102299625A (en) * | 2011-06-30 | 2011-12-28 | 深圳市伟创电气有限公司 | Switch power supply constant current voltage limiting feedback apparatus |
| CN102595700A (en) * | 2012-01-06 | 2012-07-18 | 中国矿业大学 | Intrinsic safety LED (Light Emitting Diode) driving power source with high power for mines |
| CN103901876A (en) * | 2014-03-10 | 2014-07-02 | 上海大学 | LED street lamp breakdown diagnosis system and method based on multi-sensor information fusion |
| CN104377964A (en) * | 2014-12-01 | 2015-02-25 | 中国电子科技集团公司第四十三研究所 | Integrated control circuit on basis of voltage loop feedback and automatic load current sharing |
| CN104425103A (en) * | 2013-08-30 | 2015-03-18 | 三星电机株式会社 | Choke coil and power supply device including the same |
| CN105261614A (en) * | 2015-11-02 | 2016-01-20 | 华润半导体（深圳）有限公司 | Optocoupler packaging structure, voltage feedback circuit, system, device, and packaging method |
| CN106455199A (en) * | 2016-09-18 | 2017-02-22 | 成都聚商节能科技有限公司 | Heat radiation protection for LED driving power supply |
| CN107517516A (en) * | 2017-08-15 | 2017-12-26 | 山东旭程照明科技有限公司 | A kind of double bright control systems of radar induction LED driving |
| CN110493922A (en) * | 2019-08-28 | 2019-11-22 | 厦门亚锝电子科技有限公司 | A kind of LED drive circuit of the low ripple without stroboscopic |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101198203A (en) * | 2006-12-04 | 2008-06-11 | 江苏施诺照明有限公司 | Full-electric voltage electric ballast |
| CN101267166A (en) * | 2008-01-22 | 2008-09-17 | 佛山市顺德区瑞德电子实业有限公司 | Switch power for sound box power amplification system |
| CN201204379Y (en) * | 2008-05-22 | 2009-03-04 | 襄樊进佳光电科技有限公司 | Integrated controller for semiconductor pump laser |
| CN201252483Y (en) * | 2008-05-09 | 2009-06-03 | 深圳市东辰科技有限公司 | Performance optimization circuit of series resonance type switch power supply |
-
2010
- 2010-02-02 CN CN201010105417A patent/CN101754537A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101198203A (en) * | 2006-12-04 | 2008-06-11 | 江苏施诺照明有限公司 | Full-electric voltage electric ballast |
| CN101267166A (en) * | 2008-01-22 | 2008-09-17 | 佛山市顺德区瑞德电子实业有限公司 | Switch power for sound box power amplification system |
| CN201252483Y (en) * | 2008-05-09 | 2009-06-03 | 深圳市东辰科技有限公司 | Performance optimization circuit of series resonance type switch power supply |
| CN201204379Y (en) * | 2008-05-22 | 2009-03-04 | 襄樊进佳光电科技有限公司 | Integrated controller for semiconductor pump laser |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101969725A (en) * | 2010-10-11 | 2011-02-09 | 复旦大学 | Intelligent general light-emitting diode (LED) street lamp illuminating power supply system |
| CN101969725B (en) * | 2010-10-11 | 2013-07-31 | 复旦大学 | Intelligent general light-emitting diode (LED) street lamp illuminating power supply system |
| CN101969727B (en) * | 2010-10-30 | 2014-06-04 | 陈金明 | High power LED driving power supply |
| CN101969727A (en) * | 2010-10-30 | 2011-02-09 | 陈金明 | High power LED driving power supply |
| CN102148946A (en) * | 2010-12-27 | 2011-08-10 | 东莞市乐科电子有限公司 | LED (light-emitting diode) television power circuit |
| CN102098843A (en) * | 2011-01-13 | 2011-06-15 | 浙江大学 | LED driving circuit with high accuracy and low power consumption |
| CN102299625A (en) * | 2011-06-30 | 2011-12-28 | 深圳市伟创电气有限公司 | Switch power supply constant current voltage limiting feedback apparatus |
| CN102595700A (en) * | 2012-01-06 | 2012-07-18 | 中国矿业大学 | Intrinsic safety LED (Light Emitting Diode) driving power source with high power for mines |
| CN102595700B (en) * | 2012-01-06 | 2015-01-21 | 中国矿业大学 | Intrinsic safety LED (Light Emitting Diode) driving power source with high power for mines |
| CN104425103A (en) * | 2013-08-30 | 2015-03-18 | 三星电机株式会社 | Choke coil and power supply device including the same |
| CN103901876A (en) * | 2014-03-10 | 2014-07-02 | 上海大学 | LED street lamp breakdown diagnosis system and method based on multi-sensor information fusion |
| CN104377964A (en) * | 2014-12-01 | 2015-02-25 | 中国电子科技集团公司第四十三研究所 | Integrated control circuit on basis of voltage loop feedback and automatic load current sharing |
| CN104377964B (en) * | 2014-12-01 | 2017-04-19 | 中国电子科技集团公司第四十三研究所 | Integrated control circuit on basis of voltage loop feedback and automatic load current sharing |
| CN105261614A (en) * | 2015-11-02 | 2016-01-20 | 华润半导体（深圳）有限公司 | Optocoupler packaging structure, voltage feedback circuit, system, device, and packaging method |
| CN105261614B (en) * | 2015-11-02 | 2017-10-31 | 华润半导体（深圳）有限公司 | Optocoupler encapsulating structure, voltage feedback circuit, system, equipment and method for packing |
| CN106455199A (en) * | 2016-09-18 | 2017-02-22 | 成都聚商节能科技有限公司 | Heat radiation protection for LED driving power supply |
| CN107517516A (en) * | 2017-08-15 | 2017-12-26 | 山东旭程照明科技有限公司 | A kind of double bright control systems of radar induction LED driving |
| CN107517516B (en) * | 2017-08-15 | 2023-10-27 | 山东旭程照明科技有限公司 | Radar induction LED driven double-brightness control system |
| CN110493922A (en) * | 2019-08-28 | 2019-11-22 | 厦门亚锝电子科技有限公司 | A kind of LED drive circuit of the low ripple without stroboscopic |
| CN110493922B (en) * | 2019-08-28 | 2024-09-10 | 厦门亚锝电子科技有限公司 | Low-ripple and stroboflash-free LED driving circuit |
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