CN104393500A - Time division power supply system of LED display screen - Google Patents
Time division power supply system of LED display screen Download PDFInfo
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- CN104393500A CN104393500A CN201410706490.7A CN201410706490A CN104393500A CN 104393500 A CN104393500 A CN 104393500A CN 201410706490 A CN201410706490 A CN 201410706490A CN 104393500 A CN104393500 A CN 104393500A
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- Prior art keywords
- led display
- time
- box
- switch
- power supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention discloses a time division power supply system of LED display screen. The time division power supply system of LED display screen comprises a distribution box, a switch box, a leakage protector, a time-delay relay, and a LED display screen box; the main power inlet wire of the distribution box is provided with a first stage leakage protector; the power inlet wire of the switch box is provided with a second stage leakage protector; the power inlet wire of the LED display screen box is provided with a third stage leakage protector; power outlet wires of the switch box are all provided with the time-delay relays; the time-delay relays of two adjacent output ends sequentially delay a same time; when the main power switch of the LED display screen is turned on, the output ends of the switch box sequentially delay a same time, thereby supplying power to the LED display screen time divisionally. Supplying power to LED display screen by delaying the same time avoids the phenomenon of leakage protector tripping out caused by the excessive current of supplying power at the same time, and avoids the phenomenon that part of LED display screens cannot be started due to the different surge currents in manual time division startup.
Description
Technical field
The invention belongs to electronics applications field, be specifically related to a kind of time sharing power supply system of LED display.
Background technology
Low-voltage distribution system is made up of distribution substation (normally the transmission voltage of electrical network being reduced to distribution voltage), high-tension distributing line (i.e. more than 1 kilovolt voltage), distribution transformer, low-voltage distributing line (less than 1 kilovolt voltage) and corresponding Control protection equipment.
Low-voltage circuit breaker: low-voltage circuit breaker is also known as automatic switch, and it is a kind of existing hand switch effect, can carry out again decompression, under-voltage, overload and the electrical equipment of short-circuit protection automatically.It can be used to distribute electric energy; infrequently start asynchronous motor; protection is carried out to power circuit and motor etc., can automatic shutdown circuit when serious overload or short circuit and the fault such as under-voltage occur for they, its function is equivalent to Fuse switch and the combination of crossing underheat relay etc.And generally do not need to change parts after disjunction fault current, obtain a wide range of applications.
The sub-display screen of LED electrical is powered and is support the normal operation of the sub-display screen of LED electrical, and electric power system is the important link of device LED display process, will consider the power supply link of the device process in later stage when purchasing display screen, avoids unnecessary accident of showing effect.So be important parts of comparing, today, the power supply that the sub-display screen of LED electrical is just introduced by Shenyang Huahai is described.
One, the PLC of the sub-display screen of LED electrical controls electric power system: the display screen surmounting 10KW about power consumption, should equip power distribution cabinet.The power distribution cabinet that there is long-distance manipulation function or manipulate function with PLC can be selected as required, the power distribution cabinet with PLC manipulation function is further intelligent, the switch of the long-distance operation LED display of available LCD control device and the interior equipment such as air-conditioning, blower fan of screen, ambient brightness outside ambient temperature in screen, the condition of a fire, screen is monitored in real time, and has corresponding corresponding warning message.Advocate in outdoor LED display screen project, usually because environment is poor, use the power distribution cabinet of band PLC manipulation as far as possible; In the screen project of indoor, environment is better, and limited space, PLC manipulation can not be added.
Two, LED electrical sub-display screen CCFL drive circuit design: inverter circuit can be divided into two groups: select power transistor as primary switching circuit equipment for a group that power output is lower, then selects FET for a group that power output is higher.Transformer boosts to input voltage.Demand thinking power, copper loss and the magnetic core data when describing circuit.Ballast (or secondary) electric capacity C2 by secondary to elementary reverse operation, the voltage when CCFL that can decline starts to increase with the output current beginning on CCFL.The pass between the voltage drop (VR) on voltage (VS), CCFL and voltage drop (VC) this three in secondary capacitance is started to be VS2=VR2+VC2.Secondary electrical capacitance depends on output current and output frequency.Increase capacitance and can increase output current and droping frequency.
The power utilization environment of LED display is generally poor, the potential safety hazard of circuit own is many, in use, because site environment has uncertainty, market causes earth leakage protective device at different levels to trip, this has not only had a strong impact on the normal operation of display screen, and Electrical Safety is not ensured, also has some other special factor, such as: wiring error, circuit is damaged, in switch-box, earth leakage protective device damages, LED display power supply is not through switch-box etc., and the misoperation of earth leakage protective device itself and malfunctioning, or according to actual electricity consumption situation, earth leakage protective device is not arranged, cause earth leakage protective device Frequent trip, therefore, vital to the application of earth leakage protective device in LED display is powered.
When LED display is powered, starting current is larger; big current often can cause earth leakage protective device to trip; therefore; in practical operation; often to adopt artificial time sharing power supply; because artificial power-on time is uncertain, rush of current impact is very large, and this supply power mode sometimes can cause part LED display to start.
Summary of the invention
Technical problem to be solved by this invention is: the time sharing power supply system providing a kind of LED display, solves the problem that in prior art, artificial time sharing power supply causes part LED display to start.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
A kind of time sharing power supply system of LED display, comprise distribution box, switch-box, one-level to three grade earth leakage protective device, time-delay relay, LED display casing, distribution box general supply inlet wire arranges one-level earth leakage protective device, switch-box electric power incoming line is arranged secondary earth leakage protective device, LED display casing electric power incoming line is arranged three grades of earth leakage protective devices, switch-box power supply output line all arranges time-delay relay, two time-delay relay that output connect times that successively time delay identical adjacent with switch-box, outside 380V alternating current inputs to distribution box, 210V ~ 230V voltage is exported to switch-box after transformation, switch-box exports 210V ~ 230V voltage to LED display casing, the power supply cascade of two adjacent LEDs display screen box body connects, after the total power switch of LED display is opened, the output time timesharing that time delay is identical successively of switch-box is powered to LED display.
In described LED display casing, AC/DC power module is set.
AC/DC power module in described LED display casing is 220V/5V power module.
The rated residual operating current of described one-level earth leakage protective device is 200 ~ 500mA.
Specified electric leakage operate time of described one-level earth leakage protective device is 0.2 ~ 0.3 second.
The general supply inlet wire of described distribution box adopts the Three-phase five-wire formula mode of connection.
The delay time of described time-delay relay is 0.5 ~ 1 second.
Compared with prior art, the present invention has following beneficial effect:
1, the time adopting time delay identical is that LED display is powered, and namely avoid power supply simultaneously and cause the excessive phenomenon causing earth leakage protective device to trip of electric current, turn avoid artificial timesharing and start, impulse current is different, can cause the phenomenon that part LED display cannot start.
2, adopt the supply power mode of three grades of power supplies, three grades of earth leakage protective devices, considerably reduce surge voltage, electric current, electromagnetic interference to the impact of total earth leakage protective device, improve selectivity and the reliability of total earth leakage protective device action.
3, in LED display casing metallic conductor and power lug more; often can produce the phenomenon of bad electric leakage of insulating; therefore, earth leakage protective device is installed in LED display casing and avoids previous stage earth leakage protective device Frequent trip, other LED displays are impacted.
Embodiment
Below structure of the present invention and the course of work are described further.
Those skilled in the art of the present technique are understandable that, unless otherwise defined, all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the present invention.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
A kind of time sharing power supply system of LED display, comprise distribution box, switch-box, one-level to three grade earth leakage protective device, time-delay relay, LED display casing, distribution box general supply inlet wire arranges one-level earth leakage protective device, switch-box electric power incoming line is arranged secondary earth leakage protective device, LED display casing electric power incoming line is arranged three grades of earth leakage protective devices, switch-box power supply output line all arranges time-delay relay, two time-delay relay that output connect times that successively time delay identical adjacent with switch-box, outside 380V alternating current inputs to distribution box, 210V ~ 230V voltage is exported to switch-box after transformation, switch-box exports 210V ~ 230V voltage to LED display casing, the power supply cascade of two adjacent LEDs display screen box body connects, after the total power switch of LED display is opened, the output time timesharing that time delay is identical successively of switch-box is powered to LED display.
In described LED display casing, AC/DC power module is set.
AC/DC power module in described LED display casing is 220V/5V power module.
The rated residual operating current of described one-level earth leakage protective device is 200 ~ 500mA.
Specified electric leakage operate time of described one-level earth leakage protective device is 0.2 ~ 0.3 second.
The general supply inlet wire of described distribution box adopts the Three-phase five-wire formula mode of connection.
The delay time of described time-delay relay is 0.5 ~ 1 second.
The time adopting time delay identical is that LED display is powered, and namely avoid power supply simultaneously and cause the excessive phenomenon causing earth leakage protective device to trip of electric current, turn avoid artificial timesharing and start, impulse current is different, can cause the phenomenon that part LED display cannot start.
Adopt the supply power mode of three grades of three grades of earth leakage protective devices of powering, considerably reduce surge voltage, electric current, electromagnetic interference to the impact of total earth leakage protective device, improve selectivity and the reliability of total earth leakage protective device action.
In LED display casing metallic conductor and power lug more, often can produce the phenomenon of bad electric leakage of insulating, therefore, earth leakage protective device is installed in LED display casing and avoid previous stage earth leakage protective device Frequent trip, other LED displays are impacted.
Specific embodiment one,
A kind of electric power system of P20 full-color LED display screen, comprise distribution box, switch-box, one-level to three grade earth leakage protective device, the LED display casing of 4 row 5 column distributions, 5 time-delay relays, distribution box general supply inlet wire arranges one-level earth leakage protective device, switch-box electric power incoming line is arranged secondary earth leakage protective device, LED display casing electric power incoming line is arranged three grades of earth leakage protective devices, each road output line of switch-box power supply all arranges time-delay relay, two time-delay relay that output connect times that successively time delay identical adjacent with switch-box, the present embodiment adopts the time delay time-delay relay of 1 second, outside 380V alternating current inputs to distribution box, 210V ~ 230V voltage is exported to switch-box after transformation, switch-box exports 210V ~ 230V voltage to LED display casing, the power supply cascade of two adjacent LEDs display screen box body connects.
AC/DC power module in each LED display casing is 220V/5V power module.
Switch-box exports 5 road 220V power lines, and connect the casing electric power incoming line of the foot of 5 row LED display casings respectively, the power supply of each row LED display casing connects by the mode of cascade successively from top to bottom.
The rated residual operating current of described one-level earth leakage protective device is 200 ~ 500mA.
The general supply inlet wire of described distribution box adopts the Three-phase five-wire formula mode of connection.
Specific embodiment two,
A kind of electric power system of P6 full-color LED display screen, comprise distribution box, switch-box, one-level to three grade earth leakage protective device, the LED display casing of 10 row 15 column distributions, 30 time-delay relays, distribution box general supply inlet wire arranges one-level earth leakage protective device, switch-box electric power incoming line is arranged secondary earth leakage protective device, LED display casing electric power incoming line is arranged three grades of earth leakage protective devices, each road output line of switch-box power supply all arranges time-delay relay, two time-delay relay that output connect times that successively time delay identical adjacent with switch-box, the present embodiment adopts the time delay time-delay relay of 0.8 second, outside 380V alternating current inputs to distribution box, 210V ~ 230V voltage is exported to switch-box after transformation, switch-box exports 210V ~ 230V voltage to LED display casing, the power supply cascade of two adjacent LEDs display screen box body connects.
AC/DC power module in each LED display casing is 220V/5V power module.
Switch-box comprises two, one of them switch-box exports 15 road 220V power lines, another switch-box exports 15 road 220V power lines, first switch-box connects the casing electric power incoming line of the foot of 15 row LED display casings of bottom 5 row, the power supply of each row LED display casing connects by the mode of cascade successively from top to bottom, second switch-box connects the casing electric power incoming line of the foot of 15 row LED display casings of top 5 row, and the power supply of each row LED display casing connects by the mode of cascade successively from top to bottom.
The rated residual operating current of described one-level earth leakage protective device is 200 ~ 500mA.
Specified electric leakage operate time of described one-level earth leakage protective device is 0.2 ~ 0.3 second.
The general supply inlet wire of described distribution box adopts the Three-phase five-wire formula mode of connection.
Those skilled in the art of the present technique are understandable that, the step in the various operations discussed in the present invention, method, flow process, measure, scheme can be replaced, change, combine or delete.Further, there is various operations, method, other steps in flow process, measure, the scheme discussed in the present invention also can be replaced, change, reset, decompose, combine or delete.Further, of the prior art have also can be replaced with the step in operation various disclosed in the present invention, method, flow process, measure, scheme, changed, reset, decomposed, combined or deleted.
The above is only some embodiments of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. the time sharing power supply system of a LED display, it is characterized in that: comprise distribution box, switch-box, one-level to three grade earth leakage protective device, time-delay relay, LED display casing, distribution box general supply inlet wire arranges one-level earth leakage protective device, switch-box electric power incoming line is arranged secondary earth leakage protective device, LED display casing electric power incoming line is arranged three grades of earth leakage protective devices, switch-box power supply output line all arranges time-delay relay, two time-delay relay that output connect times that successively time delay identical adjacent with switch-box, outside 380V alternating current inputs to distribution box, 210V ~ 230V voltage is exported to switch-box after transformation, switch-box exports 210V ~ 230V voltage to LED display casing, the power supply cascade of two adjacent LEDs display screen box body connects, after the total power switch of LED display is opened, the output time timesharing that time delay is identical successively of switch-box is powered to LED display.
2. the time sharing power supply system of LED display according to claim 1, is characterized in that: arrange AC/DC power module in described LED display casing.
3. the time sharing power supply system of LED display according to claim 2, is characterized in that: the AC/DC power module in described LED display casing is 220V/5V power module.
4. the time sharing power supply system of LED display according to claim 1, is characterized in that: the rated residual operating current of described one-level earth leakage protective device is 200 ~ 500mA.
5. the time sharing power supply system of LED display according to claim 1, is characterized in that: specified electric leakage operate time of described one-level earth leakage protective device is 0.2 ~ 0.3 second.
6. the time sharing power supply system of LED display according to claim 1, is characterized in that: the general supply inlet wire of described distribution box adopts the Three-phase five-wire formula mode of connection.
7. the time sharing power supply system of LED display according to claim 1, is characterized in that: the delay time of described time-delay relay is 0.5 ~ 1 second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410706490.7A CN104393500A (en) | 2014-12-01 | 2014-12-01 | Time division power supply system of LED display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410706490.7A CN104393500A (en) | 2014-12-01 | 2014-12-01 | Time division power supply system of LED display screen |
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| Publication Number | Publication Date |
|---|---|
| CN104393500A true CN104393500A (en) | 2015-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410706490.7A Withdrawn CN104393500A (en) | 2014-12-01 | 2014-12-01 | Time division power supply system of LED display screen |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113594880A (en) * | 2021-08-05 | 2021-11-02 | 韶关高尔德防雷科技有限公司 | Take time delay type power distribution module |
| CN113629987A (en) * | 2021-08-03 | 2021-11-09 | 深圳市康佳壹视界商业显示有限公司 | LED screen electrical control system |
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| CN101763125A (en) * | 2009-10-15 | 2010-06-30 | 中建八局第二建设有限公司 | Electric heating cable running control method |
| CN201984782U (en) * | 2011-01-10 | 2011-09-21 | 深圳市洲明科技股份有限公司 | Time sharing starting system for LED (light-emitting diode) display screen |
| US20140313183A1 (en) * | 2013-04-18 | 2014-10-23 | Renesas Sp Drivers Inc. | Display driver |
-
2014
- 2014-12-01 CN CN201410706490.7A patent/CN104393500A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101763125A (en) * | 2009-10-15 | 2010-06-30 | 中建八局第二建设有限公司 | Electric heating cable running control method |
| CN201984782U (en) * | 2011-01-10 | 2011-09-21 | 深圳市洲明科技股份有限公司 | Time sharing starting system for LED (light-emitting diode) display screen |
| US20140313183A1 (en) * | 2013-04-18 | 2014-10-23 | Renesas Sp Drivers Inc. | Display driver |
Non-Patent Citations (1)
| Title |
|---|
| 侯星萍: "施工现场临时用电TT保护系统漏电保护器的设置", 《安装》, no. 165, 15 February 2007 (2007-02-15), pages 39 - 41 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113629987A (en) * | 2021-08-03 | 2021-11-09 | 深圳市康佳壹视界商业显示有限公司 | LED screen electrical control system |
| CN113594880A (en) * | 2021-08-05 | 2021-11-02 | 韶关高尔德防雷科技有限公司 | Take time delay type power distribution module |
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Application publication date: 20150304 |