CN202799294U - Current sharing system for output cables for centralized power supply - Google Patents
Current sharing system for output cables for centralized power supply Download PDFInfo
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- CN202799294U CN202799294U CN201220422951.4U CN201220422951U CN202799294U CN 202799294 U CN202799294 U CN 202799294U CN 201220422951 U CN201220422951 U CN 201220422951U CN 202799294 U CN202799294 U CN 202799294U
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- led lamp
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- electric power
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Abstract
The utility model discloses a current sharing system for output cables for centralized power supply. The system comprises a power supply system module, a reverse module and more than one group of LED light sets, wherein one output portion of the power supply system module is connected directly with the anodes of one portion of the LED light sets and supplies power for the LED light sets, the cathodes of the LED light sets are connected onto ground (GND) ends of the power supply system module, the other output portion of the power supply system module is connected onto the reverse module, then connected to the cathodes of the other portion of the LED light sets after electrode reverse by the reverse module, and supplies power for the LED light sets, and the anodes of the other portion of the LED light sets are connected onto the GND ends of the power supply system module. The system is based on the fact that the existing connection mode of the power supply cables is not changed, only the power supply mode is needed to change to satisfy requirements of the LED street lamp driving power supply and lighting requirements of the existing utilities, the system is simple and practical, the cost is reduced, and a good power supply mode is provided for centralized power supply in future.
Description
Technical field
The utility model discloses a kind of LED electric power system, particularly a kind of centrally connected power supply output cable current-equalizing system.
Background technology
Along with the development of LED lighting technology, the application of LED illumination in people's life is more and more extensive, and especially the LED street lamp has the trend that progressively replaces conventional road lamp.Present LED power supply new technology exists the uneven flow problem of cable supply current can occur when centrally connected power supply directly docks with existing cable, cause easily the system failure, will certainly cause very large expense if change service cable, street lamp all is to exchange input by three-phase and four-line directly to power at present, not only efficient is low for such power cable structure, and affect useful life of street lamp, please referring to accompanying drawing 1, concentrate direct current supply can overcome above-mentioned drawback although adopt, but in the situation that does not change present cable, the electric current that can cause the situation, particularly N phase service cable of current unevenness stream in the cable of three-phase four-wire system to flow through is larger.Please referring to accompanying drawing 2, Fig. 2 is the line map of present street lamp three-phase and four-line Alternating Current Power Supply, for the failure rate that reduces the LED driving power and the needs of stow away from heat, in the prior art, usually can adopt centralized control to overcome above-mentioned drawback to the mode of LED power supply; Under the pattern that does not change existing three-phase and four-line cable power supply, adopt and concentrate direct current to power to LED, as shown in Figure 3, the flow direction by electric current is as can be known, if power to LED according to unidirectional current, current stress on the N phase cable will inevitably be very large like this, grown the fault that N phase cable then can occur burning service time, causes whole system not work.
Summary of the invention
Adopt the three-phase four-wire power supply cable to power for the above-mentioned LED street lamp of the prior art of mentioning, produce easily the problem of N phase cable fault, the utility model provides a kind of new centrally connected power supply output cable current-equalizing system, it has set up a reverse module in system, adopt reverse current to drive the supply current of a part of LED lamp group, thereby the forward and reverse electric current on the GND line (being the N phase cable in the three-phase four-wire system cable) can be neutralized, thereby alleviate the pressure of the current stress of GND line, Reduction of failure.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of centrally connected power supply output cable current-equalizing system, it is characterized in that: described system comprises the electric power system module, reverse module and one group of above LED lamp group, an electric power system module output part directly is connected with the positive pole of LED lamp group, give the power supply of LED lamp group, the negative pole of this part LED lamp group is connected to the GND end of electric power system module, an electric power system module output part is connected on the reverse module, through reverse module carry out electrode oppositely after, be connected on the negative pole of all the other LED lamp groups, give the power supply of this part LED lamp group, the positive pole of this part LED lamp group is connected to the GND end of electric power system module.
The technical scheme that its technical problem that solves the utility model adopts further comprises:
The quantity of described and the direct-connected LED lamp of electric power system module output group greater than, be equal to or less than the quantity of the LED lamp group that is connected with reverse module.
Described electric power system module is exported the 2N+1 road, and wherein the N+1 road connects directly for LED lamp group, gives the power supply of LED lamp group, and the N road is connected with reverse module, powers to LED lamp group by reverse module.
Described reverse module adopts inverter.
The beneficial effects of the utility model are: the utility model is based on the mode of connection that does not change existing service cable, only need the change powering mode, can satisfy the requirement of LED streetlamp driving power supply, satisfy existing utility illumination needs, simple and practical, reduce cost, for following centrally connected power supply provides a kind of good powering mode.
Below in conjunction with the drawings and specific embodiments the utility model is described further.
Description of drawings
Fig. 1 is the system block diagram of LED electric power system of the prior art.
Fig. 2 is the elementary diagram of LED electric power system of the prior art.
Fig. 3 is the sense of current schematic diagram of LED electric power system of the prior art.
Fig. 4 is the utility model LED electric power system block diagram.
Embodiment
Present embodiment is the utility model preferred implementation, and other all its principles are identical with present embodiment or approximate with basic structure, all within the utility model protection range.
Please referring to accompanying drawing 4, the utility model mainly comprises electric power system module, reverse module and one group of above LED lamp group, after the electric power system module is carried out the AC/DC conversion with alternating current, become the dc constant voltage source and export to the LED power supply, in the present embodiment, the output of electric power system module has VO and two interfaces of GND, an electric power system module output part directly is connected with the positive pole of LED lamp group, give the power supply of LED lamp group, the negative pole of this part LED lamp group is connected to the GND end of electric power system module, the current trend of this part is the electric power system module---LED lamp group---GND; Electric power system module output another part is connected on the reverse module, in the present embodiment, oppositely module adopts inverter, through reverse module carry out electrode oppositely after, be connected on the negative pole of all the other LED lamp groups, give the power supply of this part LED lamp group, the positive pole of this part LED lamp group is connected to the GND end of electric power system module,---LED lamp group---inverter---electric power system module that the current trend of this part is GND.In the present embodiment, with the quantity of the direct-connected LED lamp of electric power system module output group can greater than, be equal to or less than the quantity of the LED lamp group that is connected with reverse module, preferably the electric power system module is exported the 2N+1 road, wherein the N+1 road connects directly for LED lamp group, give the power supply of LED lamp group, the N road is connected with reverse module, powers to LED lamp group by reverse module.What provide in present embodiment and the accompanying drawing is the connection layout of three-phase four-wire system cable, wherein, have the output of two phase lines directly to be connected on the LED lamp group, the output of a phase line is connected on the inverter, be connected on the LED lamp group through inverter, all LED lamp groups all are connected with the GND line.
The utility model in use, the output of dc constant voltage source only has VO and GND, suppose to three lamps (side circuit has many LED lamp connection in series-parallel and uses) power supply, current direction such as the D1 lamp is to be entered from GND by positive voltage to export, the current direction of D2 lamp is to flow into the line through GND from positive voltage, again by the D3 lamp, flow back to inverter from-VO at last, like this, the electric current that four cables flow through equates, relatively conventional circuit can find out that circuit of the present utility model can well all give supply current four cables, single line can not occur and bear large current stress, has effectively reduced the damage to cable.
The utility model only needs the change powering mode based on the mode of connection that does not change existing service cable, can satisfy the requirement of LED streetlamp driving power supply, satisfy existing utility illumination needs, simple and practical, reduce cost, for following centrally connected power supply provides a kind of good powering mode.
Claims (4)
1. a centrally connected power supply is exported the cable current-equalizing system, it is characterized in that: described system comprises the electric power system module, reverse module and one group of above LED lamp group, an electric power system module output part directly is connected with the positive pole of LED lamp group, give the power supply of LED lamp group, the negative pole of this part LED lamp group is connected to the GND end of electric power system module, an electric power system module output part is connected on the reverse module, through reverse module carry out electrode oppositely after, be connected on the negative pole of all the other LED lamp groups, give the power supply of this part LED lamp group, the positive pole of this part LED lamp group is connected to the GND end of electric power system module.
2. centrally connected power supply according to claim 1 output cable current-equalizing system is characterized in that: the quantity of described and the direct-connected LED lamp of electric power system module output group greater than, be equal to or less than the quantity of the LED lamp group that is connected with reverse module.
3. centrally connected power supply according to claim 2 is exported the cable current-equalizing system, it is characterized in that: described electric power system module output 2N+1 road, wherein the N+1 road connects directly for LED lamp group, gives the power supply of LED lamp group, the N road is connected with reverse module, powers to LED lamp group by reverse module.
4. according to claim 1 and 2 or 3 described centrally connected power supplies output cable current-equalizing system, it is characterized in that: described reverse module adopts inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220422951.4U CN202799294U (en) | 2012-08-24 | 2012-08-24 | Current sharing system for output cables for centralized power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220422951.4U CN202799294U (en) | 2012-08-24 | 2012-08-24 | Current sharing system for output cables for centralized power supply |
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| Publication Number | Publication Date |
|---|---|
| CN202799294U true CN202799294U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220422951.4U Expired - Lifetime CN202799294U (en) | 2012-08-24 | 2012-08-24 | Current sharing system for output cables for centralized power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104812120A (en) * | 2014-01-24 | 2015-07-29 | 潘佩昌 | Road LED illumination DC power supply method |
| CN104918378A (en) * | 2015-06-10 | 2015-09-16 | 广州荣基能亮节能科技有限公司 | Intelligent LED (Light-Emitting Diode) street lamp power supply system |
-
2012
- 2012-08-24 CN CN201220422951.4U patent/CN202799294U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104812120A (en) * | 2014-01-24 | 2015-07-29 | 潘佩昌 | Road LED illumination DC power supply method |
| CN104918378A (en) * | 2015-06-10 | 2015-09-16 | 广州荣基能亮节能科技有限公司 | Intelligent LED (Light-Emitting Diode) street lamp power supply system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |
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| CX01 | Expiry of patent term |