CN104244489A - Energy-saving type LED street lamp drive circuit - Google Patents
Energy-saving type LED street lamp drive circuit Download PDFInfo
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- CN104244489A CN104244489A CN201410413501.2A CN201410413501A CN104244489A CN 104244489 A CN104244489 A CN 104244489A CN 201410413501 A CN201410413501 A CN 201410413501A CN 104244489 A CN104244489 A CN 104244489A
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- street lamp
- drive circuit
- led street
- energy
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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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention relates to an energy-saving type LED street lamp drive circuit. Each LED lamp pole comprises an LED street lamp and a drive circuit body driving the LED street lamp. A direct-current bus supplies power to the LED street lamps. The voltage u<PN> of the direct-current bus ranges from 310 V to 400 V. The voltage of the power source of the LED of each lamp pole is 30 V. A 30v power supply drive circuit body is arranged between each LED street lamp and the voltage end of the direct-current bus and is suitable for the LED street lamp. Each 30v power supply drive circuit body is a typical DC-DC buck circuit. The energy-saving type LED street lamp drive circuit is characterized in that two to five LED street lamp poles are grouped together to form a unit group, and the street lamp poles of each unit group are connected to the direct-current bus in series. By the adoption of the energy-saving type LED street lamp drive circuit, the input voltage of the drive circuit body in each street lamp pole tower can be reduced, once the input voltage is reduced by times, the duty ratio of the drive circuit is increased by times, and the duty ratio reaches the optimal value and ranges from 0.4 to 0.5; the working efficiency of the drive circuit is improved, and the loss of the whole direct-current supply bus is greatly reduced.
Description
Technical field
The invention belongs to street lamp field, relate to LED street lamp, especially a kind of Energy-Efficient Led Street Lamp drive circuit.
Background technology
The LED street lamp that present road generally uses, the power supply of each LED street lamp is connected in parallel on DC bus.Because DC bus-bar voltage is at about 310-400, and the power supply of the LED street lamp of each lamp stand is about 30v, therefore also one drive circuit must be provided with between led and busbar voltage, this drive circuit is typical DC-DC buck circuit, the optimum taking air ratio d=Uout/Uin of this buck circuit is between 0.4-0.5, and the efficiency of whole drive circuit is the highest.But the duty ratio d=Uout/Uin=30/310-400 of existing connected mode, its ratio is less than 0.1, causes energy-saving effect poor, and operating efficiency is very low.
By retrieval, do not have to find relevant patent document.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of Energy-Efficient Led Street Lamp drive circuit with optimum duty ratio is provided.
The object of the invention is to be achieved through the following technical solutions:
A kind of Energy-Efficient Led Street Lamp drive circuit, each LED bar comprises the drive circuit of LED street lamp and driving LED street lamp, LED street lamp by DC bus powered, DC bus-bar voltage u
pNat 310-400V, the power supply of the LED of each lamp stand is 30V, the 30v power supply drive circuit that one is suitable for LED street lamp use is set between each LED street lamp and DC bus-bar voltage, this drive circuit is typical DC-DC buck circuit, it is characterized in that: be divided into a unit group by LED street lamp lamp stand 2-5, the street lamp post in every unit group adopts series system to be connected in DC bus.
And the drive circuit conducting simultaneously of each street lamp post, turns off, the input voltage Uin=DC bus-bar voltage u of each light pole drive circuit in unit group simultaneously
pNthe lamp stand number of/series connection, the supply power mode between unit group is parallel way.
And described drive circuit duty ratio d=Uout/Uin is between 0.4-0.5.
Advantage of the present invention and good effect are:
1, the present invention can reduce the drive circuit input voltage in each street lamp shaft tower, the duty ratio of its drive circuit just increases multiple, between the 0.4-0.5 reaching duty ratio optimum, not only increase the operating efficiency of drive circuit, also greatly reduce the loss of whole direct current supply bus simultaneously.
Although 2, the present invention changes simple, but effect is very remarkable, for reduction energy consumption, increasing work efficiency serves very important effect, especially for the LED street lamp that large area uses, namely the improvement not improving any cost achieves the energy-saving effect of 10%, this is of great practical significance to whole industry, and commercial value is huge, and promotion prospect is very fine.
Accompanying drawing explanation
Fig. 1 is driving circuit principle figure of the present invention;
Fig. 2 is the driving circuit principle figure of the single unit of Fig. 1;
Fig. 3 is input current and the output voltage waveform of conventional method;
Fig. 4 is input current of the present invention and output voltage waveform.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are further described; The present embodiment is descriptive, is not determinate, can not limit protection scope of the present invention thus.
A kind of Energy-Efficient Led Street Lamp drive circuit, see Fig. 1,2, LED street lamp by DC bus powered, DC bus-bar voltage u
pNat 310-400V, the power supply of the LED of each lamp stand is 30V, the 30v power supply drive circuit that one is suitable for LED street lamp use is set between each LED street lamp and DC bus-bar voltage, this drive circuit is typical DC-DCbuck circuit, this circuit is prior art, does not provide this concrete circuit structure in embodiment accompanying drawing.
Innovative point of the present invention is:
For reaching buck circuit optimum taking air ratio d=Uout/Uin between 0.4-0.5,
A unit group is divided into by LED street lamp lamp stand 2-5, street lamp post in every unit group adopts series system to be connected in DC bus, interrupted series system is changed into by traditional parallel way by the connected mode of lamp stand input power in each unit group, the drive circuit conducting simultaneously of each street lamp post in control unit group, turn off, the input voltage Uin=DC bus-bar voltage u of each light pole drive circuit simultaneously
pNthe lamp stand number of/series connection, the supply power mode between unit group is parallel way.
As shown in drawings, be two groups of forms in Fig. 1, Fig. 2 is the type of attachment of each streetlight unit.As can be seen from type of attachment, each streetlight unit that every unit group street lamp comprises all adopts series system, as shown in Figure 2, the P1 of unit 1 connects DC bus P, the P2 of the N1 series connection next unit of unit 1, the N2 of this unit connects the P3 of its next unit, by that analogy, the connection of five unit at the most, makes the duty ratio of this kind of connected mode reach optimum.
Technical advantage of the present invention and innovation effect can also be embodied by test waveform 3,4:
In traditional parallel, P
in=V
ini
in=30016.8=5040W
In series system of the present invention, P
in=V
ini
in=30015.25=4575W
Vin＝300；Vout＝30V。
Thus, exporting identical situation, the input power of new method is compared former method and is reduced about 10%.
Operation principle of the present invention is:
The drive circuit of 2-5 lamp stand is connected, controls the conducting simultaneously of each drive circuit, turn off simultaneously; Namely the lamp stand number of the Uin=busbar voltage/series connection of buck circuit is inputted; Input reduces multiple, and the duty ratio of each drive circuit just increases multiple, reaches duty ratio optimum, and efficiency just can improve greatly.
Claims (3)
1. an Energy-Efficient Led Street Lamp drive circuit, each LED bar comprises the drive circuit of LED street lamp and driving LED street lamp, LED street lamp by DC bus powered, DC bus-bar voltage u
pNat 310-400V, the power supply of the LED of each lamp stand is 30V, the 30v power supply drive circuit that one is suitable for LED street lamp use is set between each LED street lamp and DC bus-bar voltage, this drive circuit is typical DC-DC buck circuit, it is characterized in that: be divided into a unit group by LED street lamp lamp stand 2-5, the street lamp post in every unit group adopts series system to be connected in DC bus.
2. Energy-Efficient Led Street Lamp drive circuit according to claim 1, is characterized in that: the drive circuit conducting simultaneously of each street lamp post in unit group, turns off, the input voltage Uin=DC bus-bar voltage u of each light pole drive circuit simultaneously
pNthe lamp stand number of/series connection, the supply power mode between unit group is parallel way.
3. Energy-Efficient Led Street Lamp drive circuit according to claim 1, is characterized in that: described buck circuit duty ratio d=Uout/Uin is between 0.4-0.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410413501.2A CN104244489B (en) | 2014-08-21 | 2014-08-21 | A kind of Energy-Efficient Led Street Lamp drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410413501.2A CN104244489B (en) | 2014-08-21 | 2014-08-21 | A kind of Energy-Efficient Led Street Lamp drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104244489A true CN104244489A (en) | 2014-12-24 |
| CN104244489B CN104244489B (en) | 2017-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410413501.2A Active CN104244489B (en) | 2014-08-21 | 2014-08-21 | A kind of Energy-Efficient Led Street Lamp drive circuit |
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| Country | Link |
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| CN (1) | CN104244489B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202009005445U1 (en) * | 2009-04-09 | 2009-07-16 | Lemaire, Klaus | light unit |
| CN102325416A (en) * | 2011-09-09 | 2012-01-18 | 威海东兴电子有限公司 | High-power LED lamp high-voltage isolating direct-current concentrated control power supply device |
| CN203645897U (en) * | 2014-01-09 | 2014-06-11 | 合肥云杉光电科技有限公司 | Road illumination circuit of three-phase alternating-current electric-conversion direct-current high-voltage direct-driving LED |
-
2014
- 2014-08-21 CN CN201410413501.2A patent/CN104244489B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202009005445U1 (en) * | 2009-04-09 | 2009-07-16 | Lemaire, Klaus | light unit |
| CN102325416A (en) * | 2011-09-09 | 2012-01-18 | 威海东兴电子有限公司 | High-power LED lamp high-voltage isolating direct-current concentrated control power supply device |
| CN203645897U (en) * | 2014-01-09 | 2014-06-11 | 合肥云杉光电科技有限公司 | Road illumination circuit of three-phase alternating-current electric-conversion direct-current high-voltage direct-driving LED |
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| Publication number | Publication date |
|---|---|
| CN104244489B (en) | 2017-07-28 |
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Address after: 300010 Tianjin city Hebei District Wujing Road No. 39 Applicant after: State Grid Corporation of China Applicant after: State Grid Tianjin Electric Power Company Applicant after: Road lamp management place, Tianjin Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant before: State Grid Corporation of China Applicant before: State Grid Tianjin Electric Power Company Applicant before: Road lamp management place, Tianjin |
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