CN203225913U - Power supply circuit and power supply device in LED illumination system - Google Patents
Power supply circuit and power supply device in LED illumination system Download PDFInfo
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- CN203225913U CN203225913U CN2013202292325U CN201320229232U CN203225913U CN 203225913 U CN203225913 U CN 203225913U CN 2013202292325 U CN2013202292325 U CN 2013202292325U CN 201320229232 U CN201320229232 U CN 201320229232U CN 203225913 U CN203225913 U CN 203225913U
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- circuit
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- pfc
- pfc circuit
- power supply
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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 utility model belongs to the field of LED illumination, and specifically relates to a power supply circuit and a power supply device in an LED illumination system. A PFC (Power Factor Correction) circuit is used for converting the commercial power into a high-voltage direct current, and correcting the power factor. The PFC supplies the high-voltage direct current to the following at least one DC-DC (Direct Current-Direct Current) circuit by a high-voltage direct-current output terminal. The DC-DC circuit is used for converting the high-voltage direct current into a voltage/current suitable for a single lamp, thereby driving an LED lamp. According to the utility model, compared with the configuration of multiple distributed PFC circuits, the use of the centralized PFC circuit can reduce the loss of the components, thereby effectively increasing the efficiency of the whole LED illumination power supply system; besides, the increase in the efficiency of the whole LED illumination power supply system means the supply power of the power grid under the same power requirement can be reduced, achieving the energy-saving effect.
Description
Technical field
The utility model belongs to the LED lighting field, relates in particular to power circuit and power supply device in a kind of LED illuminator.
Background technology
LED illumination has obtained the extensive employing of every field as a kind of energy-saving lamp, has especially obtained the favor of governments at all levels, scientific research institutions of colleges and universities, enterprise and supports energetically; Meanwhile, the LED power supply for the power supply of LED light fixture is the critical component of LED illuminator.
Along with popularizing of green illumination, more and more higher to the requirement of LED power supply, especially as the efficiency characteristic of critical index.For existing LED power supply, its efficient can reach 92%, and still, in the illuminator with some LED light fixture, the total losses of its LED lighting power supply system still should not be underestimated.
The utility model content
The purpose of this utility model is to provide the power circuit in a kind of LED illuminator, aims to provide a kind of centralized pfc circuit and distributed DC-DC circuit, to improve the efficient of LED lighting power supply system.
The utility model is achieved in that the input of the power circuit in the described LED illuminator and output connect mains supply circuit and LED light fixture respectively, and the power circuit in the described LED illuminator comprises:
PFC(Power Factor Correction, power factor correction) circuit and one or more DC-DC(Direct Current-Direct Current, DC-DC) circuit;
Described pfc circuit links to each other with the output of described mains supply, and each the DC-DC circuit in described one or more DC-DC circuit links to each other with described LED light fixture with the output of described pfc circuit;
Described pfc circuit is used for alternating current is converted to high voltage direct current, correcting power factors, and described DC-DC circuit is used for adjusting the voltage magnitude of the high voltage direct current that described pfc circuit exports and drives the work of described LED light fixture.
Further, described pfc circuit is boost PFC circuit, voltage-dropping type pfc circuit or buck-boost type pfc circuit.
Further, described pfc circuit is staggered pfc circuit.
Further, described pfc circuit is non-bridge PFC circuits.
Further, adopt the high-voltage transmission bus to connect the output of described pfc circuit and the input of described DC-DC circuit.
Another purpose of the present utility model is to provide the power supply device in a kind of LED illuminator, power supply device in the described LED illuminator comprises the power circuit in the LED illuminator, the input of the power circuit in the described LED illuminator and output connect mains supply circuit and LED light fixture respectively, and the power circuit in the described LED illuminator comprises:
Pfc circuit and one or more DC-DC circuit;
Described pfc circuit links to each other with the output of described mains supply, and each the DC-DC circuit in described one or more DC-DC circuit links to each other with described LED light fixture with the output of described pfc circuit;
Described pfc circuit is used for alternating current is converted to high voltage direct current, correcting power factors, and described DC-DC circuit is used for adjusting the voltage magnitude of the high voltage direct current that described pfc circuit exports and drives the work of described LED light fixture.
Further, described pfc circuit is boost PFC circuit, voltage-dropping type pfc circuit or buck-boost type pfc circuit.
Further, described pfc circuit is staggered pfc circuit.
Further, described pfc circuit is non-bridge PFC circuits.
Further, adopt the high-voltage transmission bus to connect the output of described pfc circuit and the input of described DC-DC circuit.
In the utility model, this pfc circuit is concentrated civil power is converted to high voltage direct current, simultaneously, and correcting power factors; The output of pfc circuit by high voltage direct current for the back, at least one DC-DC circuit is concentrated that high voltage direct current is provided.Centralized pfc circuit is for a plurality of distributed pfc circuits, and the loss of components and parts reduces, and has improved the efficient of whole LED lighting power supply system effectively; The raising of LED lighting power supply system efficient means that under the identical power demand, the power output of electrical network reduces, and reaches energy-conservation effect.
Description of drawings
Fig. 1 is the circuit diagram of the power circuit in the LED illuminator that provides of the utility model embodiment;
Fig. 2 is the circuit diagram of the power circuit that pfc circuit 1 is made up of a plurality of inner pfc circuits in another LED illuminator of providing of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Fig. 1 shows the power circuit diagram in the LED illuminator that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant with the utility model embodiment, and details are as follows.
Power circuit in a kind of LED illuminator, the input of the power circuit in the described LED illuminator and output connect mains supply circuit and LED light fixture respectively, and the power circuit in the described LED illuminator comprises:
Pfc circuit 1 and one or more DC-DC circuit 2;
Described pfc circuit 1 links to each other with the output of described mains supply, and each the DC-DC circuit 2 in described one or more DC-DC circuit 2 links to each other with described LED light fixture with the output of described pfc circuit 1;
Described pfc circuit 1 is used for alternating current is converted to high voltage direct current, correcting power factors, and described DC-DC circuit 2 is used for adjusting the voltage magnitude of the high voltage direct current that described pfc circuit exports and drives the work of described LED light fixture.
This pfc circuit 1 is converted to high voltage direct current with the civil power alternating current that mains supply provides, simultaneously, and by the power of correcting power factors to mate to 2 outputs of DC-DC circuit.In the present embodiment, improve the power factor that exchanges the commentaries on classics direct current by this pfc circuit 1.
Because this pfc circuit 1 is conducive to insert more DC-DC circuit 2 to the high voltage of the identical magnitude of voltage of each DC-DC circuit 2 outputs, has good autgmentability and compatibility.
Fig. 2 shows the circuit of the power circuit that pfc circuit 1 in another LED illuminator that the utility model embodiment provides is made up of a plurality of inner pfc circuits, for convenience of explanation, only shows the part relevant with the utility model embodiment, and details are as follows.
More optimizedly, pfc circuit 1 is generated for the integrated back of inner pfc circuit by one or more, and described inner pfc circuit comprises existing P FC circuit such as Boost type pfc circuit, Buck type pfc circuit and Buck-boost type topology pfc circuit, does not do restriction at this.Need to prove, when integrated generation pfc circuit 1, can select the wherein a kind of or combination of inner pfc circuit.
As the utility model one embodiment, the output of described pfc circuit 1 provides described DC-DC circuit required power in the mode of high voltage direct current to the input of described DC-DC circuit.
As the utility model one embodiment, in the high-power applications occasion, can dispose a plurality of pfc circuit 1 parallel runnings.
As the utility model one embodiment, pfc circuit 1 can be Redundancy Design, with the reliability of further raising LED illuminator.
As the utility model one embodiment, described pfc circuit 1 is existing pfc circuits such as boost PFC circuit, voltage-dropping type pfc circuit or buck-boost type pfc circuit, does not do restriction at this.
As another embodiment of the utility model, described boost PFC circuit adopts Boost type pfc circuit.
As another embodiment of the utility model, described voltage-dropping type pfc circuit adopts Buck type pfc circuit.
As another embodiment of the utility model, the combination of one or more in described buck-boost type pfc circuit employing Buck-boost type pfc circuit, Cuk type pfc circuit, Sepic type pfc circuit and the Flyback type pfc circuit.
If the power that need provide to DC-DC circuit 2 is 2000W to 3000W, then this pfc circuit 1 can be selected Boost type pfc circuit, Buck type pfc circuit or Buck-boost type pfc circuit.
As the utility model one embodiment, described pfc circuit 1 is staggered pfc circuit.Described staggered pfc circuit is existing staggered pfc circuit.
If the power that need provide to DC-DC circuit 2 is about 4000W, then this pfc circuit 1 is selected staggered pfc circuit.
As the utility model one embodiment, described pfc circuit 1 is non-bridge PFC circuits.Institute's non-bridge PFC circuits is existing non-bridge PFC circuits.
If the power that need provide to DC-DC circuit 2 is more than the 4000W, then this pfc circuit 1 is selected non-bridge PFC circuits.
As the utility model one embodiment, adopt the high-voltage transmission bus to connect the output of described pfc circuit 1 and the input of described DC-DC circuit 2.
After through this pfc circuit 1 alternating current of mains supply being converted to high voltage direct current, because the direct current after the conversion is high voltage direct current, therefore, need to select the high-voltage transmission bus that the output of pfc circuit 1 is connected with the input of each DC-DC circuit 2.
As the utility model one embodiment, the utility model also provides the power supply device in a kind of LED illuminator, power supply device in the described LED illuminator comprises the power circuit in the LED illuminator, the input of the power circuit in the described LED illuminator and output connect mains supply circuit and LED light fixture respectively, and the power circuit in the described LED illuminator comprises:
Pfc circuit 1 and one or more DC-DC circuit 2;
Described pfc circuit 1 links to each other with the output of described mains supply, and each the DC-DC circuit 2 in described one or more DC-DC circuit 2 links to each other with described LED light fixture with the output of described pfc circuit 1;
Described pfc circuit 1 is used for alternating current is converted to high voltage direct current, correcting power factors, and described DC-DC circuit 2 is used for adjusting the voltage magnitude of the high voltage direct current that described pfc circuit 1 exports and drives the work of described LED light fixture.
As the utility model one embodiment, described pfc circuit 1 is existing pfc circuits such as boost PFC circuit, voltage-dropping type pfc circuit or buck-boost type pfc circuit, does not do restriction at this.
As the utility model one embodiment, described pfc circuit 1 is staggered pfc circuit.
As the utility model one embodiment, described pfc circuit 1 is non-bridge PFC circuits.
As the utility model one embodiment, adopt the high-voltage transmission bus to connect the output of described pfc circuit 1 and the input of described DC-DC circuit 2.
In order to explain the utility model better, in conjunction with Fig. 1, the operation principle of the power circuit in the LED illuminator is described:
The civil power alternating current that pfc circuit 1 provides mains supply is converted to high voltage direct current (in the present embodiment, the voltage of this high voltage direct current is 380V to 420V), improves simultaneously to exchange the power factor of changeing direct current; Pfc circuit 1 provides the high-tension electricity of identical voltage to each DC-DC circuit 2; DC-DC circuit 2 is adjusted the voltage of output to the LED light fixture power supply that connects according to the voltage of the LED light fixture demand that is connected with this DC-DC circuit 2.
Illuminator with 250 LED light fixtures is example, and wherein, because the demand power of LED light fixture is 120W, therefore, the rated output power of each LED power supply is 120W.
In traditional powering mode, connect the illuminator that pfc circuit, each pfc circuit connect 250 LED light fixtures of mains supply respectively respectively by each DC-DC circuit and form; Therefore, traditional power supplying efficiency (efficient of distributed pfc circuit+DC-DC power supply) sees Table 1:
Table 1
The input power of single led power supply is that 130.43W, power output are 120W, and efficient is to amount to 250 LED light fixtures in 92%, the LED illuminator, and then the total power input of LED lighting power supply system and total losses are respectively 32607.5W and 2607.5W.
The power circuit that present embodiment provides comprises centralized pfc circuit 1 and distributed DC-DC circuit 2, and this centralized pfc circuit 1 is connected with each DC-DC circuit 2 respectively.Based on the power circuit that present embodiment provides, the efficient of distributed DC-DC circuit 2 can reach 96%; Identical 120W is example with each LED power supply output, and the efficient of distributed DC-DC circuit 2 sees Table 2:
Table 2
In order to give the DC-DC circuit 2 power supplies, the centralized pfc circuit 1 of prime need provide the power of coupling, the identical voltage DC-DC circuit 2 to the back level to each DC-DC circuit 2, and the efficient of centralized pfc circuit 1 sees Table 3:
Table 3
The total power input of centralized pfc circuit 1 is the total power input of LED lighting power supply system, and 250 required power of light fixture are the power output of LED lighting power supply system; Therefore, the efficient of centralized pfc circuit+distributed DC-DC circuit of providing of present embodiment sees Table 4:
Table 4
Therefore, the power circuit in the LED illuminator that provides based on present embodiment, LED lighting power supply system gross efficiency is 94%, and is higher two percentage points than the efficient (92%) of original LED lighting power supply system; 1888 watts of electric power system total losses have reduced 719.5 watts than original 2607.5 watts.
In like manner, illuminator for 30 LED light fixtures, connect the illuminator that pfc circuit, each pfc circuit connect 30 LED light fixtures of mains supply respectively respectively at each DC-DC circuit, obtain the efficient of traditional power supplying efficiency (efficient of distributed pfc circuit+DC-DC power supply), see Table 5; The illuminator of 30 LED light fixtures that are connected with each DC-DC circuit 2 respectively at centralized pfc circuit 1, the efficient that obtains the efficient of the efficient of distributed DC-DC circuit 2, centralized pfc circuit, centralized pfc circuit+distributed DC-DC circuit see Table 6 respectively, table 7, table 8.
Table 5
Table 6
Table 7
Table 8
Therefore, the power circuit in the LED illuminator that provides based on present embodiment, LED lighting power supply system gross efficiency can reach 94.07%, and is higher two percentage points than the efficient (92%) of original LED lighting power supply system; 227 watts of electric power system total losses have reduced 85.9 watts than original 312.9 watts.
The pcb board of centralized pfc circuit 1 is not suitable for being installed in the narrow space, as the LED lamp interior because size is bigger.It is indoor that this centralized pfc circuit 1 can be arranged on switchgear house or machine room etc., in indoor environment, on the one hand, can reduce the IP class requirement, can satisfy actual needs as IP20, removes production process and the colloid cost of encapsulating less; On the other hand, avoid adverse weather condition to the influence of LED power supply, especially in the thunderstorm prone areas.More optimizedly, anti-surge circuit, input protection circuits such as lightning-protection module optionally are integrated in the centralized pfc circuit 1, with the lightning protection characteristic of further raising LED power supply.
Preferably, centralized pfc circuit 1 inside can nested a plurality of inner pfc circuits, to satisfy power demands.Modular circuit design can effectively adapt to various actual power occasions, improves versatility, the reliability and stability of centralized pfc circuit 1, also is conducive to improve simultaneously the integrated level of LED light fixture.The pfc circuit 1 that present embodiment provides according to the power demand of DC-DC circuit 2, can adopt Boost type, Buck type or Buck-boost type topology pfc circuit, and its power output can be adjusted in 3000W; Also can adopt staggered PFC, its power output is about 4000W, also can adopt non-bridge PFC, can adjust to power output more than the 4000W.
More optimizedly, in the DC-DC circuit 2 of back level, DC-DC circuit 2 can adopt circuit of reversed excitation, forward converter or LLC topology.The DC-DC circuit still has corresponding protective circuit or protection components and parts simultaneously, as the input fuse, and thermistor, piezo-resistance, overvoltage protection, overcurrent protection, overheat protector, short-circuit protections etc. are with the reliability of further raising LED illuminator.
In the utility model embodiment, centralized pfc circuit is for a plurality of distributed pfc circuits, and the loss of components and parts reduces significantly, has improved the efficient of whole LED lighting power supply system effectively.For the DC-DC circuit of back level, efficient has further improved the efficient of whole LED lighting power supply system also than existing LED power supply height, has reduced the power output of mains supply, reaches energy-conservation effect.This pfc circuit each DC-DC circuit of level backward provides the high voltage direct current of fixed voltage, has improved the compatibility to the DC-DC circuit, can expand the DC-DC circuit as required.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (10)
1. the power circuit in the LED illuminator, the input of the power circuit in the described LED illuminator and output connect mains supply circuit and LED light fixture respectively, it is characterized in that, and the power circuit in the described LED illuminator comprises:
Pfc circuit and one or more DC-DC circuit;
Described pfc circuit links to each other with the output of described mains supply, and each the DC-DC circuit in described one or more DC-DC circuit links to each other with described LED light fixture with the output of described pfc circuit;
Described pfc circuit is used for alternating current is converted to high voltage direct current, correcting power factors, and described DC-DC circuit is used for adjusting the voltage magnitude of the high voltage direct current that described pfc circuit exports and drives the work of described LED light fixture.
2. the power circuit in the LED illuminator as claimed in claim 1 is characterized in that, described pfc circuit is boost PFC circuit, voltage-dropping type pfc circuit or buck-boost type pfc circuit.
3. the power circuit in the LED illuminator as claimed in claim 1 is characterized in that, described pfc circuit is staggered pfc circuit.
4. the power circuit in the LED illuminator as claimed in claim 1 is characterized in that, described pfc circuit is non-bridge PFC circuits.
5. the power circuit in the LED illuminator as claimed in claim 1 is characterized in that, adopts the high-voltage transmission bus to connect the output of described pfc circuit and the input of described DC-DC circuit.
6. the power supply device in the LED illuminator, power supply device in the described LED illuminator comprises the power circuit in the LED illuminator, the input of the power circuit in the described LED illuminator and output connect mains supply circuit and LED light fixture respectively, it is characterized in that the power circuit in the described LED illuminator comprises:
Pfc circuit and one or more DC-DC circuit;
Described pfc circuit links to each other with the output of described mains supply, and each the DC-DC circuit in described one or more DC-DC circuit links to each other with described LED light fixture with the output of described pfc circuit;
Described pfc circuit is used for alternating current is converted to high voltage direct current, correcting power factors, and described DC-DC circuit is used for adjusting the voltage magnitude of the high voltage direct current that described pfc circuit exports and drives the work of described LED light fixture.
7. power supply device as claimed in claim 6 is characterized in that, described pfc circuit is boost PFC circuit, voltage-dropping type pfc circuit or buck-boost type pfc circuit.
8. power supply device as claimed in claim 6 is characterized in that, described pfc circuit is staggered pfc circuit.
9. power supply device as claimed in claim 6 is characterized in that, described pfc circuit is non-bridge PFC circuits.
10. power supply device as claimed in claim 6 is characterized in that, adopts the high-voltage transmission bus to connect the output of described pfc circuit and the input of described DC-DC circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202292325U CN203225913U (en) | 2013-04-28 | 2013-04-28 | Power supply circuit and power supply device in LED illumination system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202292325U CN203225913U (en) | 2013-04-28 | 2013-04-28 | Power supply circuit and power supply device in LED illumination system |
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| Publication Number | Publication Date |
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| CN203225913U true CN203225913U (en) | 2013-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202292325U Withdrawn - After Issue CN203225913U (en) | 2013-04-28 | 2013-04-28 | Power supply circuit and power supply device in LED illumination system |
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| CN (1) | CN203225913U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103228075A (en) * | 2013-04-28 | 2013-07-31 | 深圳桑达国际电子器件有限公司 | Power source circuit and power source device in LED illumination system |
-
2013
- 2013-04-28 CN CN2013202292325U patent/CN203225913U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103228075A (en) * | 2013-04-28 | 2013-07-31 | 深圳桑达国际电子器件有限公司 | Power source circuit and power source device in LED illumination system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131002 Effective date of abandoning: 20160518 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |