CN103826353A - LED-based driving power supply for sunshine-imitating light source - Google Patents
LED-based driving power supply for sunshine-imitating light source Download PDFInfo
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- CN103826353A CN103826353A CN201210469540.5A CN201210469540A CN103826353A CN 103826353 A CN103826353 A CN 103826353A CN 201210469540 A CN201210469540 A CN 201210469540A CN 103826353 A CN103826353 A CN 103826353A
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Abstract
The invention discloses an LED-based driving power supply for a sunshine-imitating light source. The LED-based driving power supply comprises an anti-surge circuit, a filter circuit I, a transformer connected with the filter circuit I, a rectification circuit for converting alternating current outputted by the transformer into direct current, a filter circuit II for eliminating pulsation components in the direct current outputted by the rectification circuit, a PFC converter for correcting and compensating circuit power factors under the control of a controller, a DC/DC converter for converting voltage outputted by the PFC converter to enable a driven LED light source to obtain required voltage, a voltage sampling circuit connected with the driven LED light source, a V/I converting circuit for converting voltage signals outputted by the voltage sampling circuit into current signals, and a protection circuit connected between the controller and the PFC converter. The LED-based driving power supply is simple in structure and convenient in wiring, and can supply power for a lot of LEDs effectively and continuously.
Description
Technical field
The present invention relates to a kind of power supply, especially relate to the imitated light source driving power of a kind of LED-based sunlight.
Background technology
Power supply is the power heart of electronic equipment, the quality of its performance directly has influence on the safety and reliability of whole system, along with the high speed development of power electronic technology, power electronic equipment and people's work, the relation of life are day by day close, and electronic equipment be unable to do without reliable power supply.
Light source individuality in the imitated light source of sunlight is made up of a large amount of LED lamps.LED lamp belongs to current device, and needing to provide the power supply of stabling current to power for it.Common power supply, in the time being the LED power supply of super large quantity, there will be stability not high, the lower situation of conversion efficiency.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned deficiency of the prior art, provides a kind of LED-based sunlight to copy light source driving power, and it is simple in structure, easy-to-connect, and it is a large amount of LED power supplies efficiently that work can continue.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of LED-based sunlight is copied light source driving power, it is characterized in that: comprise the anti-surge circuit for preventing that surge current is invaded when the voltage ripple of power network, be used for the filter circuit one of the interference signal of filtering line voltage, the transformer joining with filter circuit one, the alternating current of transformer output is converted to galvanic rectification circuit, be used for the filter circuit two of the ripple component of filtering direct current that rectification circuit is exported, under the control of controller, adopt boost inverse-excitation converting method the power factor of circuit to be carried out to the pfc converter of correction-compensation, the voltage of pfc converter output is converted so that obtained the DC/DC converter of required voltage by driving LED light source, with the voltage sampling circuit being joined by driving LED light source, the voltage signal of voltage sampling circuit output is converted to the V/I change-over circuit of current signal and be connected to controller and pfc converter between for the protection of pfc converter to realize the protective circuit of constant current voltage limiting control, described anti-surge circuit and AC network are joined, described filter circuit one joins with anti-surge circuit, described rectification circuit joins with transformer and filter circuit two respectively, described pfc converter and filter circuit two join, described DC/DC converter joins with pfc converter with by driving LED light source respectively, described voltage sampling circuit and controller join, and described V/I change-over circuit joins with voltage sampling circuit and controller respectively.
The LED-based sunlight of above-mentioned one is copied light source driving power, it is characterized in that: described controller is DSP digital signal processor.
The LED-based sunlight of above-mentioned one is copied light source driving power, it is characterized in that: described rectification circuit is single phase bridge type rectifier circu.
The LED-based sunlight of above-mentioned one is copied light source driving power, it is characterized in that: described filter circuit one is LC passive filter circuit.
The LED-based sunlight of above-mentioned one is copied light source driving power, it is characterized in that: described filter circuit two is active filter circuit.
The LED-based sunlight of above-mentioned one is copied light source driving power, it is characterized in that: described voltage sampling circuit comprises resitstance voltage divider, voltage follower and A/D converter, described resitstance voltage divider with joined by driving LED light source, described A/D converter and controller join, and described voltage follower joins with described resitstance voltage divider and described A/D converter respectively.
The present invention compared with prior art has the following advantages: simple in structure, easy-to-connect, changes switching frequency and the duty ratio of pfc converter by controller, realize constant current voltage limiting control; And by the voltage and current of sampling LED, when abnormality is appearred in driving power, protect, have advantages of that high conversion efficiency, high reliability and antijamming capability are strong.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention.
Description of reference numerals:
1-AC network; 2-anti-surge circuit; 3-filter circuit one;
4-transformer; 5-rectification circuit; 6-filter circuit two;
7-pfc converter; 8-DC/DC converter; 9-by driving LED light source;
10-voltage sampling circuit; 11-V/I change-over circuit; 12-protective circuit;
13-controller.
Embodiment
As shown in Figure 1, the present invention includes the anti-surge circuit 2 for preventing that surge current is invaded when the voltage ripple of power network, be used for the filter circuit 1 of the interference signal of filtering line voltage, the transformer 4 joining with filter circuit 1, the alternating current that transformer 4 is exported is converted to galvanic rectification circuit 5, be used for the filter circuit 26 of the ripple component of filtering rectification circuit 5 direct current of exporting, under the control of controller 13, adopt boost inverse-excitation converting method the power factor of circuit to be carried out to the pfc converter 7 of correction-compensation, the voltage that pfc converter 7 is exported converts so that obtained the DC/DC converter 8 of required voltage by driving LED light source 9, with the voltage sampling circuit 10 being joined by driving LED light source 9, the voltage signal that voltage sampling circuit 10 is exported be converted to current signal V/I change-over circuit 11 and and be connected between controller 13 and pfc converter 7 for the protection of pfc converter 7 to realize the protective circuit 12 of constant current voltage limiting control, described anti-surge circuit 2 joins with AC network 1, described filter circuit 1 joins with anti-surge circuit 2, described rectification circuit 5 joins with transformer 4 and filter circuit 26 respectively, described pfc converter 7 joins with filter circuit 26, described DC/DC converter 8 joins with pfc converter 7 with by driving LED light source 9 respectively, described voltage sampling circuit 10 joins with controller 13, and described V/I change-over circuit 11 joins with voltage sampling circuit 10 and controller 13 respectively.
In the present embodiment, described controller 13 is DSP digital signal processor.
In the present embodiment, described rectification circuit 4 is single phase bridge type rectifier circu.
In the present embodiment, described filter circuit 1 is LC passive filter circuit.
In the present embodiment, described filter circuit 26 is active filter circuit.
In the present embodiment, described voltage sampling circuit 10 comprises resitstance voltage divider, voltage follower and A/D converter, described resitstance voltage divider with joined by driving LED light source 9, described A/D converter and controller 13 join, and described voltage follower joins with described resitstance voltage divider and described A/D converter respectively.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every any simple modification of above embodiment being done according to the technology of the present invention essence, change and equivalent structure change, and all still belong in the protection range of technical solution of the present invention.
Claims (6)
1. the imitated light source driving power of LED-based sunlight, it is characterized in that: comprise the anti-surge circuit (2) for preventing that surge current is invaded when the voltage ripple of power network, be used for the filter circuit one (3) of the interference signal of filtering line voltage, the transformer (4) joining with filter circuit one (3), the alternating current of transformer (4) output is converted to galvanic rectification circuit (5), be used for the filter circuit two (6) of the ripple component of filtering rectification circuit (5) direct current of exporting, under the control of controller (13), adopt boost inverse-excitation converting method the power factor of circuit to be carried out to the pfc converter (7) of correction-compensation, the voltage of pfc converter (7) output is converted so that obtained the DC/DC converter (8) of required voltage by driving LED light source (9), with the voltage sampling circuit (10) being joined by driving LED light source (9), by the voltage signal of voltage sampling circuit (10) output be converted to current signal V/I change-over circuit (11) and and be connected between controller (13) and pfc converter (7) for the protection of pfc converter (7) to realize the protective circuit (12) of constant current voltage limiting control, described anti-surge circuit (2) joins with AC network (1), described filter circuit one (3) joins with anti-surge circuit (2), described rectification circuit (5) joins with transformer (4) and filter circuit two (6) respectively, described pfc converter (7) joins with filter circuit two (6), described DC/DC converter (8) joins with pfc converter (7) with by driving LED light source (9) respectively, described voltage sampling circuit (10) joins with controller (13), described V/I change-over circuit (11) joins with voltage sampling circuit (10) and controller (13) respectively.
2. according to the imitated light source driving power of the LED-based sunlight of one claimed in claim 1, it is characterized in that: described controller (13) is DSP digital signal processor.
3. according to the imitated light source driving power of the LED-based sunlight of the one described in claim 1 or 2, it is characterized in that: described rectification circuit (4) is single phase bridge type rectifier circu.
4. according to the imitated light source driving power of the LED-based sunlight of the one described in claim 1 or 2, it is characterized in that: described filter circuit one (3) is LC passive filter circuit.
5. according to the imitated light source driving power of the LED-based sunlight of the one described in claim 1 or 2, it is characterized in that: described filter circuit two (6) is active filter circuit.
6. according to the imitated light source driving power of the LED-based sunlight of the one described in claim 1 or 2, it is characterized in that: described voltage sampling circuit (10) comprises resitstance voltage divider, voltage follower and A/D converter, described resitstance voltage divider with joined by driving LED light source (9), described A/D converter and controller (13) join, and described voltage follower joins with described resitstance voltage divider and described A/D converter respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210469540.5A CN103826353A (en) | 2012-11-18 | 2012-11-18 | LED-based driving power supply for sunshine-imitating light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210469540.5A CN103826353A (en) | 2012-11-18 | 2012-11-18 | LED-based driving power supply for sunshine-imitating light source |
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| Publication Number | Publication Date |
|---|---|
| CN103826353A true CN103826353A (en) | 2014-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210469540.5A Pending CN103826353A (en) | 2012-11-18 | 2012-11-18 | LED-based driving power supply for sunshine-imitating light source |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109548239A (en) * | 2018-12-13 | 2019-03-29 | 东南大学 | A kind of LED light power control with virtual synchronous machine response mechanism |
| CN111083847A (en) * | 2020-01-08 | 2020-04-28 | 广东电网有限责任公司 | High-power-factor LED driving system of transformer substation |
-
2012
- 2012-11-18 CN CN201210469540.5A patent/CN103826353A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109548239A (en) * | 2018-12-13 | 2019-03-29 | 东南大学 | A kind of LED light power control with virtual synchronous machine response mechanism |
| CN111083847A (en) * | 2020-01-08 | 2020-04-28 | 广东电网有限责任公司 | High-power-factor LED driving system of transformer substation |
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| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140528 |