CN201854469U - LED (light-emitting diode) centralized direct current supply system - Google Patents
LED (light-emitting diode) centralized direct current supply system Download PDFInfo
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- CN201854469U CN201854469U CN2010205877657U CN201020587765U CN201854469U CN 201854469 U CN201854469 U CN 201854469U CN 2010205877657 U CN2010205877657 U CN 2010205877657U CN 201020587765 U CN201020587765 U CN 201020587765U CN 201854469 U CN201854469 U CN 201854469U
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Abstract
The utility model provides an LED (light-emitting diode) centralized direct current supply system, which comprises a three-phase input interface, a power supply output interface, N+1 three-phase PWM (pulse width modulation) rectifier power modules, N load modules and a power supply management module, wherein the system uses the power supply management module to collect and output an output voltage current on positive and negative output bus bars, the voltage and current at three-phase input end and a control signal of the three-phase PWM rectifier power module, adjust the duty ratio of the three-phase PWM rectifier power module, and then directly convert the power frequency alternated current of power grid into adjustable direct current voltage through the PWM rectifier power supply, so that the output power which reaches dozens of kilowatts to hundreds of kilowatts or higher can be directly supplied to the LED in the whole circuit. The LED centralized direct current supply system provided by the utility model is controlled through the power supply management module so as to switch on/off the redundancy power supply in system fault or maintenance and monitor the LED.
Description
Technical field
The utility model relates to the technical field of the centralized DC power-supply system of a kind of LED, is specifically related to the centralized DC power-supply system of a kind of LED.
Background technology
At present extensively to drive all be the power supplys that adopt several hectowatts following to the LED that adopts, and every cover LED light fixture integrated independently a power supply and a LED lamp, as shown in Figure 1.This supply power mode is brought following problem: the one, and Design of Luminaires will be considered the position and the heat radiation of power supply, volume is big, Design of Luminaires is subjected to power limitations, and cost improves; The 2nd, in a single day power supply damages, and whole light fixture is scrapped simultaneously, cost height, life-span weak point; The 3rd, the unified brightness adjustment control of a plurality of LED is difficult for realizing.
At above deficiency, the utility model has overcome above problem, utility model a kind of LED centralized DC power-supply system.
The utility model content
The purpose of this utility model is to overcome the prior art above shortcomings, and a kind of LED is provided centralized DC power-supply system.The utility model is applicable to systems such as LED street lamp, the form that can replace traditional single lamp list power supply, realization separates the LED lamp with power supply, by centralized machine room to LED lamp centrally connected power supply, the utility model is also realized power supply by the N+1 redundant fashion in addition, by power management module control, realize the system failure or when safeguarding redundant power excision or incorporate into, and to the monitoring of LED.Has the saving cost, advantages such as power supply maintenance and power management convenience.The utility model is achieved through the following technical solutions.
The centralized DC power-supply system of a kind of LED, comprise: three-phase input interface, power output interface, N+1 three-phase PWM rectifier power source module, N load blocks and be used for that input and output detect and regulate the power management module of three-phase PWM rectifier power source module duty ratio to power supply; Each three-phase PWM rectifier power source module all has three-phase input end, and all three-phase input ends are connected with described three-phase input interface respectively; Described power output interface has positive output bus and negative output bus, and each three-phase PWM rectifier power source module all has positive output end that is connected with described positive output bus and the negative output terminal that is connected with described negative output bus; N load blocks is attempted by respectively between positive output bus and the negative output bus, and described power management module is connected with each three-phase PWM rectifier power source module respectively, and N is a natural number.
The above-mentioned centralized DC power-supply system of a kind of LED, the input phase voltage of described three-phase input interface is 90V ~ 264V.
The above-mentioned centralized DC power-supply system of a kind of LED, each three-phase PWM rectifier power source module comprises the three-phase PWM rectification circuit, the power management module that is connected with three-phase PWM rectifier power source module carries out PWM to three-phase PWM rectifier power source module to be regulated, and realizes that output is adjustable.
The above-mentioned centralized DC power-supply system of a kind of LED, each load blocks comprise the constant flow module and the LED lamp group of series connection, and the positive pole of load blocks connects the positive output bus, and the negative electrode of LED lamp group is that the negative pole of load blocks connects the negative output bus.
The above-mentioned centralized DC power-supply system of a kind of LED, described power management module comprises data acquisition module, control module and computer.
The above-mentioned centralized DC power-supply system of a kind of LED, described N+1 three-phase PWM rectifier power source module and power management module constitute power supply unit, and power supply unit is placed in the middle of the circuit of all LED lamp groups that this equipment will power.
The running of the centralized DC power-supply system of above-mentioned a kind of LED: the input voltage and input current of the three-phase input end of the output voltage electric current on data collecting module collected positive output bus and the negative output bus, three-phase PWM rectifier power source module and the duty ratio and the output of three-phase PWM rectifier power source module, again data are sent to computer and carry out data processing, when positive and negative busbar output voltage electric current is too high or low excessively, the duty of regulating three-phase PWM rectifier power source module by control module recently with positive and negative busbar output voltage current stabilization in normal operating conditions; When the three-phase input voltage electric current occurs too high or low excessively the time, recently realize protection to power supply by the duty of regulating three-phase PWM rectifier power source module; And the various supplemental characteristics of power supply are shown on computers.
In the above-mentioned running, can also regulate the duty ratio of three-phase PWM rectifier power source module according to video data on the computer and comprehensive weather condition and road surface situation, thereby regulate the brightness of LED lamp group, realize energy-conservation.
Compared with prior art, the utlity model has following advantage and effect:
With under the power condition, than the light fixture of an integrated power supply in existing each LED lamp, cost reduces.Wherein power supply is separated with the LED lamp, make the light fixture volume reduce greatly, Design of Luminaires is more flexible, and can avoid the waste of the lamp package that causes in short-term than LED lamp when power source life; In addition power supply with also make separating of LED lamp the heat-dissipating space of LED lamp become big, prolonged the life-span of LED lamp.
Three-phase input interface (U wherein
a, U
b, U
c), input phase voltage various grades in 90V ~ 264V are all applicable, and three-phase PWM rectifier power source module output voltage is controlled, is applicable to the LED lamp group of various electric pressures.Power output interface comprises positive and negative busbar (+,-).
N+1 three-phase PWM rectifier power source module realizes N+1 power supply redundancy power supply, makes the whole LED system very reliable, makes power-source maintenance very convenient; Each module all has three-phase input end, and correspondence is connected to three-phase input interface (U from top to bottom respectively
a, U
b, U
c) on; N+1 three-phase PWM rectifier power source module, each module all have just (+) negative (-) output port, the corresponding respectively both positive and negative polarity that is connected to the output bus; Each three-phase PWM rectifier power source module, inside comprises the three-phase PWM rectification, can regulate by this module being carried out PWM, realizes that output is adjustable, and proposes to adopt the PWM rectified three-phase circuit in the LED electric power main circuit, makes power factor higher.
Power supply unit is placed in the middle of the LED circuit that will power, can effectively controls line loss, the line consumption is little.
Generally speaking, the utlity model has following advantage and effect: at present extensively to drive all be the power supplys that adopt several hectowatts following to the LED that adopts, and every cover LED light fixture integrated independently a power supply and a LED lamp, as shown in Figure 1.This supply power mode is brought following problem: the one, and Design of Luminaires will be considered the position and the heat radiation of power supply, volume is big, Design of Luminaires is subjected to power limitations, and cost improves; The 2nd, in a single day power supply damages, and whole light fixture is scrapped simultaneously, cost height, life-span weak point; The unified brightness adjustment control of more than three LED is difficult for realizing, and the utility model has solved above-mentioned problem, and it directly becomes the electrical network industrial frequency AC into adjustable direct current by the PWM rectification, and power output can reach tens kilowatts, supplies with the LED on the whole piece circuit.
Description of drawings
Fig. 1 is the LED light fixture block diagram of traditional single lamp list supply power mode.
Fig. 2 is the framework schematic diagram of the centralized DC power-supply system of a kind of LED in the utility model embodiment.
Fig. 3 is the PWM rectified three-phase circuit figure of PWM three phase rectifier module shown in Figure 2.
Embodiment
Below in conjunction with accompanying drawing concrete enforcement of the present utility model is further described, but enforcement of the present utility model and protection range are not limited thereto.
As Fig. 2, the utility model provides a kind of LED centralized DC power-supply system.Comprise: the three-phase input interface; Power output interface; N+1 three-phase PWM rectifier power source module; N load blocks; The power management module that whole system is monitored in real time.Each three-phase PWM rectifier power source module all has three-phase input end, and all three-phase input ends are connected with described three-phase input interface respectively; Described power output interface has positive output bus and negative output bus, and each three-phase PWM rectifier power source module all has positive output end that is connected with described positive output bus and the negative output terminal that is connected with described negative output bus; N load blocks is attempted by respectively between positive output bus and the negative output bus, and described power management module is connected with each three-phase PWM rectifier power source module respectively, and N is a natural number.
The centralized DC power-supply system of this LED, it directly becomes the electrical network industrial frequency AC into adjustable DC voltage by the PWM rectifier power source, and power output can reach tens kilowatts ~ hundreds of kilowatt or bigger, directly supplies with the LED on the whole piece circuit.The centralized DC power-supply system of a kind of LED described in the utility model, by power management module control, realize the system failure or when safeguarding redundant power excision or incorporate into, and to the monitoring of LED.
As figure, wherein three-phase input interface (U
a, U
b, U
c), input phase voltage various grades in 90V ~ 264V are all applicable, and three-phase PWM rectifier power source module output voltage is controlled, is applicable to the LED lamp group of various electric pressures.Power output interface comprises positive and negative busbar (+,-).N+1 three-phase PWM rectifier power source module realizes N+1 power supply redundancy power supply, makes the whole LED system very reliable, makes power-source maintenance very convenient; Each module all has three-phase input end, and correspondence is connected to three-phase input interface (U from top to bottom respectively
a, U
b, U
c) on; N+1 three-phase PWM rectifier power source module, each module all have just (+) negative (-) output port, the corresponding respectively both positive and negative polarity that is connected to the output bus; Each three-phase PWM rectifier power source module, inside comprises the three-phase PWM rectification, can regulate by this module being carried out PWM, realizes that output is adjustable, and proposes to adopt in the LED electric power main circuit three-phase PWM rectifier power source module road, makes power factor higher.
N load blocks, correspondence is parallel to positive and negative busbar (+,-) respectively; Each load blocks comprises the constant flow module and the LED lamp group of series connection, is negative pole from the approaching end of the negative electrode of LED lamp group in the load blocks wherein, is connected to negative busbar, is anode from the approaching end of LED lamp group anode, is connected to anode; Constant flow module wherein can be ripe arbitrarily circuit, and as the chips such as HV9910, HV9912 of Supertex company, every group of LED only needs a constant current control mould fast, realizes the constant current operation.
Propose centralized power and be convenient to realize power management.Comprise data acquisition and control module, computer and Control Software are by the electric current and voltage of the output voltage electric current on the positive negative output bus of data acquisition, three-phase input end and the control signal and the output of three-phase PWM rectifier power source module.After the back-end data processing, send control signal and give three-phase PWM rectifier power source module, thereby regulate output voltage and electric current.When detected three-phase input voltage is crossed (not in preset range) low or too high the time, be zero by the duty ratio of regulating three-phase PWM rectifier power source module, forbid its work and send alarm signal; When detected three-phase input voltage electric current is too high, be zero by the duty ratio of regulating three-phase PWM rectifier power source module, signal gives the alarm; When the output voltage electric current on detecting positive negative output bus exceeds certain value, reduce the duty ratio (controlled quentity controlled variable) of three-phase PWM rectifier power source module, thus the proof load normal power supply, and the signal that gives the alarm in case of necessity reminds the staff to note; In addition, according to weather condition and road surface situation, the staff can regulate the duty ratio of three-phase PWM rectifier power source module, makes the brightness of LED lamp group be unlikely to bright and cause waste, thereby reaches energy-conservation effect.
Proposition is placed in centrally connected power supply equipment in the middle of the LED circuit that will power, can effectively control line loss, and the line consumption is little.
Fig. 3 has provided the three-phase PWM rectifier power source module circuit diagram of LED concentration supply power rack of the present utility model, U among the figure
a, U
b, U
cBe its three-phase input end, V
T1, V
T2, V
T3, V
T4, V
T5, V
T6Be six control switch pipes of three-phase PWM rectifier power source module, six switching tubes have constituted a three-phase bridge circuit jointly, and three-phase input end is connected to the emphasis of three brachium pontis respectively, form a three-phase PWM rectifier power source module jointly.
As above can realize the utility model preferably, the centralized DC power-supply system of LED described in the utility model, directly the electrical network industrial frequency AC is become adjustable DC voltage by the PWM rectifier power source, power output can reach tens kilowatts ~ hundreds of kilowatt or bigger, directly supplies with the LED on the whole piece circuit.
Claims (5)
1. centralized DC power-supply system of LED, it is characterized in that comprising: the three-phase input interface, power output interface, N+1 three-phase PWM rectifier power source module, N load blocks and be used for that input and output detect and regulate the power management module of three-phase PWM rectifier power source module duty ratio to power supply; Each three-phase PWM rectifier power source module all has three-phase input end, and all three-phase input ends are connected with described three-phase input interface respectively; Described power output interface has positive output bus and negative output bus, and each three-phase PWM rectifier power source module all has positive output end that is connected with described positive output bus and the negative output terminal that is connected with described negative output bus; N load blocks is attempted by respectively between positive output bus and the negative output bus, and described power management module is connected with each three-phase PWM rectifier power source module respectively, and N is a natural number.
2. the centralized DC power-supply system of a kind of LED according to claim 1 is characterized in that each three-phase PWM rectifier power source module includes the three-phase PWM rectification circuit.
3. the centralized DC power-supply system of a kind of LED according to claim 1, it is characterized in that each load blocks comprises the constant flow module and the LED lamp group of series connection, the positive pole of load blocks connects the positive output bus, and the negative electrode of LED lamp group is that the negative pole of load blocks connects the negative output bus.
4. according to the centralized DC power-supply system of each described a kind of LED of claim 1 ~ 3, it is characterized in that described power management module comprises data acquisition module, control module and computer.
5. the centralized DC power-supply system of a kind of LED according to claim 4, it is characterized in that described N+1 three-phase PWM rectifier power source module and power management module constitute power supply unit, power supply unit is placed in the middle of the circuit of all LED lamp groups that this equipment will power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205877657U CN201854469U (en) | 2010-11-02 | 2010-11-02 | LED (light-emitting diode) centralized direct current supply system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205877657U CN201854469U (en) | 2010-11-02 | 2010-11-02 | LED (light-emitting diode) centralized direct current supply system |
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| CN201854469U true CN201854469U (en) | 2011-06-01 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102045925A (en) * | 2010-11-02 | 2011-05-04 | 华南理工大学 | LED centralized direct-current power supply system and operating method thereof |
| CN103427652A (en) * | 2013-08-01 | 2013-12-04 | 南京南瑞继保电气有限公司 | High-voltage high-power DC-DC conversion device |
| EP3208927A4 (en) * | 2014-10-15 | 2018-06-13 | Toray Industries, Inc. | Three-phase ac/dc conversion device, photochemical reaction device and method using same, and method for producing lactam |
-
2010
- 2010-11-02 CN CN2010205877657U patent/CN201854469U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102045925A (en) * | 2010-11-02 | 2011-05-04 | 华南理工大学 | LED centralized direct-current power supply system and operating method thereof |
| WO2012058904A1 (en) * | 2010-11-02 | 2012-05-10 | 华南理工大学 | Centralized dc power supply system for leds and operation method thereof |
| CN102045925B (en) * | 2010-11-02 | 2013-11-27 | 华南理工大学 | LED centralized direct-current power supply system and operating method thereof |
| CN103427652A (en) * | 2013-08-01 | 2013-12-04 | 南京南瑞继保电气有限公司 | High-voltage high-power DC-DC conversion device |
| EP3208927A4 (en) * | 2014-10-15 | 2018-06-13 | Toray Industries, Inc. | Three-phase ac/dc conversion device, photochemical reaction device and method using same, and method for producing lactam |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110601 Effective date of abandoning: 20131127 |
|
| RGAV | Abandon patent right to avoid regrant |