CN204858558U - LED display screen power supply system - Google Patents
LED display screen power supply system Download PDFInfo
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- CN204858558U CN204858558U CN201520509620.8U CN201520509620U CN204858558U CN 204858558 U CN204858558 U CN 204858558U CN 201520509620 U CN201520509620 U CN 201520509620U CN 204858558 U CN204858558 U CN 204858558U
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- power supply
- led display
- pfc
- power
- display screen
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Abstract
The utility model discloses a LED display screen power supply system, include and convert the commercial power to DCDC power that galvanic PFC power and 400V DC conversion with PFC power output about 400V becomes the required power of LED display screen, the PFC power set up in LED display screen mains power supply department, the DCDC power set up in each LED display screen department or large -scale LED display screen insidely everywhere, DCDC power input end and connect the output of PFC power. Because PFC output is that 400V's direct current virtual value is higher than the 220V alternating current of commercial power, 45% electric wire cost probably can be practiced thrift so as long as the electric wire area of receiving each DCDC power, that is to say this scheme 220V alternating current 55% just passable to 55% the when electric current has only the alternating current under the circumstances with the constant power.
Description
Technical field
The utility model relates to LED display electric power system.
Background technology
At present, LED display is widely used in advertisement promotion field, on avenue, building, can find the trace of LED billboard on highway limit everywhere.
LED billboard adopts mains-supplied, and each billboard or other LED module all need one to convert 220V electric main to DC power supply required for LED board.Because LED ad display screen area is very large, need to use a large amount of power supplys, the difference that these power supplys are distributed in display screen is as required local, and receiving these power supplys from mains electricity input end lead-in wire needs a large amount of electric wires, makes the electric power system cost of whole LED ad display screen very high.
Utility model content
The utility model, for the very high deficiency of the electric power system cost of current LED ad display screen, provides a kind of LED display electric power system.
The technical scheme that the utility model adopts is a kind of LED display electric power system, comprise galvanic PFC power supply civil power being converted to about 400V and the DC/DC power supply 400V direct current that PFC power supply exports being converted to power supply required for LED display, described PFC power supply is arranged on mains-supplied place, described DC/DC power supply is arranged on each LED display place, and described DC/DC power sources in parallel is arranged on the output of described PFC power supply.
What export due to PFC is that the direct current effective value of 400V is higher than the 220V alternating current of civil power, when when Same Efficieney, electric current only has alternating current 55%, as long as so receive the 55% just passable of the electric wire area 220V alternating current of each DC/DC power supply, that is this programme approximately can save the electric wire cost of 45%.
The utility model also possesses following preferred version:
Arrange one group at described mains-supplied place and export identical PFC power supply, the direct current output-parallel of all PFC power supplys.One group of PFC power supply is that one group of LED display is powered jointly, electric power system is made to have expandability, when LED display increases, during load capacity more than a PFC power supply, a PFC power supply can be increased again, when there being multiple stage PFC power supply to power simultaneously, when there being the damage of PFC power supply to need repairing at mains-supplied place, directly can take off maintenance, not affect LED display work.
One group of power supply exporting identical PFC power supply is the same model PFC power supply of same batch.Ideally, each PFC power supply mean allocation load.
Arrange a diode preventing electric current from pouring in down a chimney at the output of PFC power supply, the P pole of described diode connects the positive voltage output end of PFC power supply.When just in case when having the output voltage of the PFC electric power output voltage of a special parallel connection lower than other PFC power supply, due to the one-way conduction characteristic of diode, make electric current be unlikely and pour in down a chimney in this PFC power supply, protect PFC power supply.
Below with reference to drawings and Examples, the utility model is described in detail.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment one schematic diagram.
Fig. 2 is the utility model embodiment two schematic diagram.
Fig. 3 is the utility model embodiment three schematic diagram.
Embodiment
Embodiment 1, the present embodiment is a kind of LED display electric power system of powering for the LED billboard being distributed in each block, city, as shown in Figure 1, N block LED ad display screen is had to be arranged on city everywhere, for powering to these LED ad display screens, first the place of mains-supplied is had at one, particularly transformer capacity abundance place or from the place that each ad display screen Distance geometry is relatively little, a PFC power supply is set, this PFC power supply realizes Active PFC, civil power is converted to the direct voltage output of about 400V simultaneously.The direct current of about the 400V then adopting wire to be exported by PFC power supply is transported to each LED ad display screen place, be provided with the DC power supply be converted to required for LED ad display screen by 400V direct current to power to LED ad display screen at LED ad display screen place, for large-scale display screen, 400V direct current is transported to display screen everywhere after, 400V high pressure is converted to the voltage required for LED display by recycling DC/DC power supply.
In the present embodiment, owing to adopting 400V direct current supply, and the direct current effective value of 400V is higher than 220V alternating current, when Same Efficieney, electric current only has 55% of alternating current, as long as so receive the 55% just passable of the electric wire area 220V alternating current of each DC/DC power supply, that is this programme approximately can save the electric wire cost of 45%.
Embodiment 2 as shown in Figure 2, the 400V direct current that the present embodiment adopts PFC power supply to export equally is powered to being arranged on prefecture LED display everywhere, the DC power supply of DC/DC Power convert required for each LED display is utilized at LED display place, in the present embodiment, have employed multiple PFC power supply, as shown in Figure 2, what adopt is X PFC power supply, this X PFC power sources in parallel uses, obtain from civil power simultaneously and exchange input, the DC power supply Parallel opertation of same generation about 400V, powers for being arranged on city LED display everywhere jointly.Like this, PFC power supply can be increased as required, make the load capacity of each PFC power supply be a bit larger tham all LED displays gross power and, when the increase along with city area, when the quantity of billboard increases, can directly increase PFC power supply, ensure to power continuously.
Embodiment 3, the present embodiment in the same manner as in Example 2, just increase a diode at the output of each PFC power supply, this diode can prevent due to when the output voltage of certain PFC electric power output voltage lower than other PFC power supply, prevent high voltage from pouring in down a chimney from its output and enter PFC power source internal, damage PFC power supply, as shown in Figure 3, diode D1, D2, Dx be exactly when preventing due to the output voltage of output voltage lower than other PFC power supply, prevents electric current from pouring in down a chimney from output and enter into PFC power source internal.
Claims (4)
1. a LED display electric power system, comprise galvanic PFC power supply civil power being converted to about 400V and the DC/DC power supply 400V direct current that PFC power supply exports being converted to power supply required for LED display, it is characterized in that: described PFC power supply is arranged on LED display mains-supplied place, described DC/DC power supply is arranged on each LED display place, and described DC/DC power input is attempted by the output of described PFC power supply.
2. LED display electric power system according to claim 1, is characterized in that: arrange one group at described LED display mains-supplied place and export identical PFC power supply, the direct current output-parallel of all PFC power supplys.
3. LED display electric power system according to claim 2, is characterized in that: one group of power supply exporting identical PFC power supply is the same model PFC power supply of same batch.
4. the LED display electric power system according to Claims 2 or 3, is characterized in that: arrange a diode preventing electric current from pouring in down a chimney at the output of PFC power supply, and the P pole of described diode connects the positive voltage output end of PFC power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520509620.8U CN204858558U (en) | 2015-07-14 | 2015-07-14 | LED display screen power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520509620.8U CN204858558U (en) | 2015-07-14 | 2015-07-14 | LED display screen power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204858558U true CN204858558U (en) | 2015-12-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520509620.8U Active CN204858558U (en) | 2015-07-14 | 2015-07-14 | LED display screen power supply system |
Country Status (1)
| Country | Link |
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| CN (1) | CN204858558U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300321A (en) * | 2016-08-31 | 2017-01-04 | 四川升华电源科技有限公司 | Power supply anti-back flow circuit |
-
2015
- 2015-07-14 CN CN201520509620.8U patent/CN204858558U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300321A (en) * | 2016-08-31 | 2017-01-04 | 四川升华电源科技有限公司 | Power supply anti-back flow circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 518000 Floors 1-3 and 1-5 of Block A, Block B2, Jinweiyuan Industrial Plant, Longshan District, Pingshan New District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Gold Power Technology Co., Ltd. Address before: 518000 Shenzhen, Guangdong, Pingshan new industrial zone, poly dragon hill area Jinwei Industrial Zone A 1 floor. Patentee before: Shenzhen Gold Power Technology Co., Ltd. |