CN206759773U - LED constant-current driver redundancy switching device - Google Patents
LED constant-current driver redundancy switching device Download PDFInfo
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- CN206759773U CN206759773U CN201720405506.XU CN201720405506U CN206759773U CN 206759773 U CN206759773 U CN 206759773U CN 201720405506 U CN201720405506 U CN 201720405506U CN 206759773 U CN206759773 U CN 206759773U
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- switching device
- redundancy switching
- current driver
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Abstract
A kind of LED constant-current driver redundancy switching device, including N number of LED driver and LED lamp panel are the utility model is related to, is connected to together in LED lamp panel after described N number of LED driver parallel connection.Compared with prior art, the utility model has the advantages that cost of implementation is cheap, switching is reliable and stable.
Description
Technical field
A kind of LED actuation techniques are the utility model is related to, switches more particularly, to a kind of LED constant-current driver redundancy and fills
Put.
Background technology
The advantages that LED illumination is accepted extensively by people, and it saves, be highly reliable is especially prominent, such as in street lamp, Tunnel Lamp
Deng the higher occasion of requirement.But place extra high to reliability requirement or some limitations, for example drilling platforms, harbour are at a high speed
High-Pole Lamp, the occasion maintenance costs of these special applications is expensive, and the light fixture far above initial stage is put into, while can also influence owner
Use, particularly municipal foundation engineering.So improve light fixture reliability it is particularly important, LED driver be typically light fixture can
By property short slab.
Generally substantially place two LED drivers in the high lamp applications of reliability requirement at present and put one again automatically
The control device of switching, after a LED driver fails, disablement signal is detected by auxiliary detection device, then filled with control
Put and be switched to another standby driver.But this scheme cost of implementation is expensive, scheme is complicated.Simultaneously in constant-current type driver
The middle heavy current impact existed to lamp plate, is easily lost lamp bead.And when switching switching, the function during the switching of light fixture can be caused
Lose, cause fatal potential safety hazard.
Utility model content
The purpose of this utility model is exactly to be driven to provide a kind of LED constant current the defects of overcoming above-mentioned prior art to exist
Dynamic device redundancy switching device.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of LED constant-current driver redundancy switching device, including N number of LED driver and LED lamp panel, described N number of LED
It is connected to together in LED lamp panel after driver parallel connection.
It is connected per paths of LEDs driver by diode with LED lamp panel, the positive pole and LED driver of described diode are defeated
Go out end connection, the negative pole of described diode is connected with LED lamp panel.
Described LED driver is preferably 2-6.
Described LED driver is preferably 2.
Described LED lamp panel uses multiple lamp bead series systems.
Compared with prior art, the utility model has advantages below：
First without additional detections device and unit, it is only necessary to can perceive it by itself output voltage of LED driver
The failure conditions of his LED driver, implementation are simple, reliable, operable.Secondly case is realized certainly without unnecessary switching switch
Dynamic switching, in LED driver handoff procedure, light fixture is at least ensureing the brightness for having half, does not cause light fixture to turn off the light basic
Loss of functionality, really realize seamless switching.This last implementation method is not because increasing LED driver disablement signal detection means
With switching switch element, therefore cost of implementation is cheap, and switching is reliable and stable.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the VF voltages and forward conduction current curve diagram of lamp bead.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that described embodiment is part of the embodiment of the present utility model, rather than is all implemented
Example.Based on the embodiment in the utility model, those of ordinary skill in the art institute on the premise of creative work is not made
The every other embodiment obtained, it should all belong to the scope of the utility model protection.
As shown in figure 1, there is N number of LED driver A, B ... N parallel, one is connected between each driver is output to LED lamp panel
Individual diode Da, Db ... Dn, then All Drives parallel connection is connected in LED lamp panel together again, powered for lamp plate.
Each driver is by being only to export the 1/n of the specified input current of lamp plate in work, while monitoring driving device in real time
Output voltage change, when driver output voltage is mutated small, while when output current is unmutated big, raises output current, tie up
Hold electric current needed for the specified light output of beginning of light fixture.Per road, the diode of output series connection is to ensure, LED driver fails not all the way
Whole light fixture can be caused to fail, and play being effectively isolated between driver.
With two (quantity is not limited to two, beneficial to statement below) constant-current LED driver A and B, direct parallel drive one
Lamp plate, 1/2 electric current that each driver output current sets for lamp plate, while the voltage of real-time monitoring driving device in the drive
Output, now the output voltage of driver is by the lamp bead VF voltages institute clamper of lamp plate, therefore the output voltage of two drivers is consistent.
After some driver A fails, the driver is caused not export, the electric current that now lamp bead is born only has lamp plate setting specified
The half of electric current, due to the VF voltages and forward conduction electric current proportional of lamp bead, as shown in Figure 2.
Therefore when the electric current that lamp bead is born only have before half when, the VF voltages of lamp bead will decline to a great extent, driver
Output voltage be that the VF voltages of lamp bead will also decline therewith, the driver B not failed detects this signal, and (output voltage is significantly
Decline) after the output current of itself is adjusted to full output (being set as 1/2 rated current when before in parallel), the output light of light fixture
According to back to normal, the automatic switchover of redundancy LED driver is realized.Because many lamp plates are to use multiple lamp bead series systems,
Also need to consider whether to cause the VF of lamp plate to decline for a certain lamp bead short circuit in lamp string during lamp plate VF during detection, this lamp bead is lost in itself
Effect needs to exclude, and lamp bead short circuit causes VF to decline, while also the output current of non-failed drive can be caused to sharply increase, can be with
Identify whether to fail for driver using this characteristic, so as to avoid redundancy from switching by mistake.
It is described above, only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art can readily occur in various in the technical scope that the utility model discloses
Equivalent modifications or substitutions, these modifications or substitutions should all cover within the scope of protection of the utility model.Therefore, this practicality
New protection domain should be defined by scope of the claims.
Claims (5)
1. a kind of LED constant-current driver redundancy switching device, it is characterised in that described including N number of LED driver and LED lamp panel
N number of LED driver parallel connection after be connected to together in LED lamp panel.
2. a kind of LED constant-current driver redundancy switching device according to claim 1, it is characterised in that driven per paths of LEDs
Device is connected by diode with LED lamp panel, and the positive pole of described diode is connected with LED driver output end, two described poles
The negative pole of pipe is connected with LED lamp panel.
3. a kind of LED constant-current driver redundancy switching device according to claim 1, it is characterised in that described LED drives
Dynamic device is preferably 2-6.
4. a kind of LED constant-current driver redundancy switching device according to claim 1 or 3, it is characterised in that described
LED driver is preferably 2.
A kind of 5. LED constant-current driver redundancy switching device according to claim 1, it is characterised in that described LED
Plate uses multiple lamp bead series systems.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720405506.XU CN206759773U (en) | 2017-04-18 | 2017-04-18 | LED constant-current driver redundancy switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720405506.XU CN206759773U (en) | 2017-04-18 | 2017-04-18 | LED constant-current driver redundancy switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206759773U true CN206759773U (en) | 2017-12-15 |
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ID=60614171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201720405506.XU Active CN206759773U (en) | 2017-04-18 | 2017-04-18 | LED constant-current driver redundancy switching device |
Country Status (1)
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| CN (1) | CN206759773U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108738190A (en) * | 2017-04-18 | 2018-11-02 | 上海鸣志自动控制设备有限公司 | A kind of LED constant-current driver redundancy switching device |
-
2017
- 2017-04-18 CN CN201720405506.XU patent/CN206759773U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108738190A (en) * | 2017-04-18 | 2018-11-02 | 上海鸣志自动控制设备有限公司 | A kind of LED constant-current driver redundancy switching device |
| CN108738190B (en) * | 2017-04-18 | 2024-03-22 | 上海鸣志自动控制设备有限公司 | LED constant current driver redundancy switching device |
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