CN108668403B - A kind of LED constant pressure current-equalizing system - Google Patents
A kind of LED constant pressure current-equalizing system Download PDFInfo
- Publication number
- CN108668403B CN108668403B CN201710209405.XA CN201710209405A CN108668403B CN 108668403 B CN108668403 B CN 108668403B CN 201710209405 A CN201710209405 A CN 201710209405A CN 108668403 B CN108668403 B CN 108668403B
- Authority
- CN
- China
- Prior art keywords
- current
- resistance
- equalizing
- voltage
- sharing module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
- H02M7/08—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode arranged for operation in parallel
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/395—Linear regulators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The invention belongs to LED fields, provide a kind of LED constant pressure current-equalizing system；In the present invention, by including multiple current-sharing modules, multiple DC power supplies and LED load module；Multiple current-sharing modules connect one to one with multiple DC power supplies, each current-sharing module detects the output voltage of corresponding DC power supply, and equalizing voltage is generated according to output voltage, multiple equalizing voltages that multiple current-sharing modules generate are exported to current equalizing bus bar to generate current equalizing bus bar voltage, each current-sharing module generates feedback signal according to current equalizing bus bar voltage to adjust the output voltage of its corresponding DC power supply, therefore can be improved the stream effect of the parallel connection power supply of LED load module.
Description
Technical field
The invention belongs to LED field more particularly to a kind of LED constant pressure current-equalizing systems.
Background technique
As the power of LED load module improves, the requirement to power supply power supply electric current is increasing, great power LED system
Several or more than ten power module power supplies are needed, all common load sharings of power module, this requires power modules to have
Perfect and stable flow equalizing circuit.
In the prior art, as shown in Figure 1, the parallel connection power supply of LED load module utilizes the loading rate of power supply itself
Naturally sharing current is realized with blocking diode, without complicated flow equalizing circuit, it is only necessary to increase by one in the output end of each power module
A blocking diode, but since only the loading rate of itself and blocking diode realize naturally sharing current for it, therefore flow
Effect is poor.
Therefore, the prior art is without flow equalizing circuit, so as to cause the problem that stream effect is poor.
Summary of the invention
The present invention provides a kind of LED constant pressure current-equalizing systems, it is intended to solve the prior art because of no flow equalizing circuit, so as to cause
The poor problem of stream effect.
The invention is realized in this way a kind of LED constant pressure current-equalizing system comprising multiple current-sharing modules, multiple direct currents
Source and LED load module；
The multiple current-sharing module connects one to one with the multiple DC power supply, wherein the electricity of each current-sharing module
Stream sampling end is connected with the sampling end that feedback output end distinguishes corresponding DC power supply with feedback input end, the multiple equal
The equalizing voltage end of flow module is connected to current equalizing bus bar altogether, the cathode output end of the multiple DC power supply with the LED load
The first end of module connects, and the second end of the cathode output end of the multiple DC power supply and the LED load module is connected to altogether
Power ground；
Each current-sharing module detects the output voltage of corresponding DC power supply, and raw according to the output voltage
At equalizing voltage, multiple equalizing voltages that the multiple current-sharing module generates are exported to the current equalizing bus bar to generate current equalizing bus bar
Voltage, each current-sharing module generate feedback signal according to the current equalizing bus bar voltage to adjust its corresponding DC power supply
Output voltage.
Technical solution provided by the invention has the benefit that as can be seen from the above-mentioned present invention, since LED constant pressure flows
System includes multiple current-sharing modules, multiple DC power supplies and LED load module；Multiple current-sharing modules and multiple DC power supplies one
One is correspondingly connected with, and each current-sharing module detects the output voltage of corresponding DC power supply, and is generated according to output voltage
Weigh voltage, and multiple equalizing voltages that multiple current-sharing modules generate are exported to current equalizing bus bar to generate current equalizing bus bar voltage, Mei Gejun
Flow module generates feedback signal according to current equalizing bus bar voltage to adjust the output voltage of its corresponding DC power supply, therefore can be improved
The stream effect of the parallel connection power supply of LED load module.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
The function structure chart of the LED constant pressure current-equalizing system of Fig. 1 prior art；
Fig. 2 is a kind of function structure chart of LED constant pressure current-equalizing system provided in an embodiment of the present invention；
Fig. 3 is a kind of exemplary circuit structure chart of LED constant pressure current-equalizing system current-sharing module provided in an embodiment of the present invention；
Fig. 4 is another exemplary circuit structure of LED constant pressure current-equalizing system current-sharing module provided in an embodiment of the present invention
Figure；
Fig. 5 is the function structure chart of LED constant pressure current-equalizing system current-sharing module provided in an embodiment of the present invention；
Fig. 6 is a kind of exemplary circuit structure chart for the LED constant pressure current-equalizing system current-sharing module that Fig. 5 is provided.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Fig. 2 shows the modular structures of LED constant pressure current-equalizing system provided in an embodiment of the present invention, for ease of description, only
Part related to the embodiment of the present invention is shown, details are as follows:
A kind of LED constant pressure current-equalizing system comprising multiple current-sharing module 01i, multiple DC power supply 02i and LED load
Module 03.
Wherein, multiple current-sharing module 01i and multiple DC power supply 02i connect one to one, wherein each current-sharing module
The current sampling port of 01i is connected with the sampling end that feedback output end distinguishes corresponding DC power supply 02i with feedback input end,
The equalizing voltage end of multiple current-sharing module 01i is connected to current equalizing bus bar altogether, and the cathode output end of multiple DC power supply 02i is and LED
The first end of load blocks connects, and the cathode output end of multiple DC power supply 02i and the second end of LED load module are connected to electricity altogether
Source.
Each current-sharing module 01i detects the output voltage of corresponding DC power supply 02i, and is generated according to output voltage
Equalizing voltage, multiple equalizing voltages that multiple current-sharing module 01i are generated are exported to current equalizing bus bar to generate current equalizing bus bar voltage, often
A current-sharing module 01i generates feedback signal according to current equalizing bus bar voltage to adjust the output voltage of its corresponding DC power supply 02i.
Wherein, multiple equalizing voltages that multiple current-sharing module 01i are generated are exported to current equalizing bus bar to generate current equalizing bus bar electricity
Pressure, each current-sharing module 01i generate feedback signal according to current equalizing bus bar voltage to adjust the output of its corresponding DC power supply 02i
Specifically there are two types of situations for voltage:
In the case of the first, when a current-sharing module 01i in multiple current-sharing module 01i is main current-sharing module 01i, except master
When multiple current-sharing module 01i other than current-sharing module 01i are from current-sharing module 01i, multiple current-sharing module 01i generate it is multiple
Weighing apparatus voltage output generates current equalizing bus bar voltage to current equalizing bus bar, and each current-sharing module 01i generates anti-according to current equalizing bus bar voltage
Feedback signal is to adjust the output voltage of its corresponding DC power supply 02i specifically: the equalizing voltage of main current-sharing module is exported to equal
Flow bus to generate current equalizing bus bar voltage, each from the more corresponding equalizing voltage of current-sharing module and current equalizing bus bar voltage,
And feedback signal is generated to adjust each from the output voltage of the corresponding DC power supply of current-sharing module.
Optionally, the maximum current-sharing module of equalizing voltage in multiple current-sharing modules is main current-sharing module, except main equal
Multiple current-sharing modules other than flow module are from current-sharing module.
Optionally, a current-sharing module in multiple current-sharing modules is set as main current-sharing module, except main current-sharing module with
Outer multiple current-sharing modules are set to from current-sharing module.
Under second situation, multiple equalizing voltages that multiple current-sharing module 01i are generated are exported to current equalizing bus bar to generate
Busbar voltage is flowed, each current-sharing module 01i generates feedback signal according to current equalizing bus bar voltage to adjust its corresponding DC power supply
The output voltage of 02i specifically: multiple equalizing voltages that multiple current-sharing module 01i are generated are exported to current equalizing bus bar to be flowed with generating
Busbar voltage, each current-sharing module 01i is compared corresponding equalizing voltage and current equalizing bus bar voltage, and generates feedback
Signal is to adjust the output voltage of the corresponding DC power supply 02i of each current-sharing module 01i.
LED load module can be concatenated LED module, LED module in parallel or single led.
Fig. 3 shows a kind of example electricity of the current-sharing module 01i in LED constant pressure current-equalizing system provided in an embodiment of the present invention
Line structure, for ease of description, only parts related to embodiments of the present invention are shown, and details are as follows:
Current-sharing module 01i includes flowing chip U1, optocoupler U2, first capacitor C1, first resistor R1, second resistance R2, the
Three resistance R3 and the 4th resistance R4；The first end for flowing the current detecting end SENSE and first resistor R1 of chip U1 is to flow
The power end Vcc of the current sampling port of module 01i, stream chip U1 is connect with the first end of second resistance R2, stream chip U1
Current regulation end ADJ and optocoupler light emitting diode negative pole end connect, stream chip U1 current regulation setting end ADJR with
The first end of 3rd resistor R3 connects, and the external capacitor end COMP of stream chip U1 is connect with the first end of first capacitor C1,
The bus end SHARE+ for flowing chip U1 is the equalizing voltage end of current-sharing module 01i, the bus reference end SHARE- of stream chip U1,
Flow the second end of ground terminal GND first resistor R1 of chip U1, the first end of 3rd resistor R3, optocoupler U2 emitter and
The first end of 4th resistance R4 is connected to power ground altogether, and the second end of second resistance R2 and the light emitting diode anode of optocoupler U2 connect
It connects, the current collection of the optocoupler U2 extremely feedback output end of current-sharing module 01i.
Wherein, stream chip U1 includes the first operational amplifier U11, second operational amplifier U12, third operational amplifier
U13, four-operational amplifier U14 first diode D1 and the first triode Q1, the anti-phase input of the first operational amplifier U11
End is the current detecting end for flowing chip U1, and the normal phase input end of the first operational amplifier U11 is the ground terminal for flowing chip U1
The output end of GND, the first operational amplifier U11 and the positive input and four-operational amplifier of second operational amplifier U12
The inverting input terminal of U4 connects, the positive input of the reverse input end, third operational amplifier U13 of second operational amplifier U12
The cathode of end and first diode D1 are the bus end SHARE+ for flowing chip U1, the output end of second operational amplifier U12
It is connect with the anode of first diode D1, the output end of third operational amplifier U13 and the forward direction of four-operational amplifier U14 are defeated
Enter end connection, the reverse input end of third operational amplifier U13 is the bus reference end SHARE- for flowing chip U1, the 4th operation
The output end of amplifier U14 is connect with the base stage of the first triode Q1, and the current collection of the first triode Q1 extremely flows chip U1's
The emitter electrode of current regulation end ADJ, the first triode Q1 are the current regulation setting end ADJR for flowing chip U1.
It is described further below in conjunction with current-sharing module 01i of the working principle to LED constant pressure current-equalizing system shown in Fig. 3:
The current sampling signal of DC power supply is input to the first operation by the current detecting end SENSE of stream chip U1 and puts
It is divided into two paths of signals output after big device U11, the first operational amplifier U11 amplification, all the way after second operational amplifier U12 amplification
Bus end SHARE+ by flowing chip U1 is exported to current equalizing bus bar, due to second operational amplifier U12 output end and
There are a diodes by the bus end SHARE+ of stream chip U1, therefore the maximum current-sharing module of output current value becomes on current equalizing bus bar
Main module, remaining current-sharing module are adjusted according to the output current value of main module.Due to the effect of main module, each from module
The level of positive input of four-operational amplifier U14 be locked into a definite value, if the output of some current-sharing module
Electric current is small, then the level of the positive input of its four-operational amplifier U14 is small, the output level of four-operational amplifier U14
Greatly, the electric current flowed out through the first triode Q1 is also big, therefore the electric current of the collector of optocoupler U2 is big, to complete stream adjustment.
Fig. 4 shows another example of the current-sharing module 01i in LED constant pressure current-equalizing system provided in an embodiment of the present invention
Circuit structure, for ease of description, only parts related to embodiments of the present invention are shown, and details are as follows:
Current-sharing module 01i includes the 5th operational amplifier U5, the 6th operational amplifier U6, the 7th operational amplifier U7, the
Two capacitor C2, third capacitor C3, the 4th capacitor C4, the 5th capacitor C5, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7,
Eight resistance R8, the 9th resistance R9, the tenth resistance R10, eleventh resistor R11, twelfth resistor R12, thirteenth resistor R13,
14 resistance R14, the 15th resistance R15, the 16th resistance R16 and the 17th resistance R17；
The positive input and the first end of third capacitor C3 and the first end of the 5th resistance R5 of 5th operational amplifier U5
Connection, the reverse input end of the 5th operational amplifier U5 and the first end of the 8th resistance R8 and the first end of the tenth resistance R10 connect
It connecing, the output end of the 5th operational amplifier U5 is connect with the first end of the second end of the 8th resistance R8 and eleventh resistor R11, the
The positive input of six operational amplifier U6 is connect with the first end of the first end of the second capacitor C2 and the 7th resistance R7, the 6th fortune
The reverse input end for calculating amplifier U6 is connect with the second end of the first end of the 9th resistance R9 and the tenth resistance R10, the 6th operation
The output end of amplifier U6 is connect with the first end of the second end of the 9th resistance R9 and twelfth resistor R12, the 7th operation amplifier
The second end of the reverse input end of device U7 and eleventh resistor R11, the first end of the 4th capacitor C4 and the 15th resistance R15
The of first end, the positive input of the 7th operational amplifier U7 and the second end of twelfth resistor R12 and thirteenth resistor R13
The second of the first end of one end connection, the output end of the 7th operational amplifier U7 and the 14th resistance R14, the 15th resistance R15
The connection of the first end of end and the 16th resistance R16, the second end of the 16th resistance R16 and the first end of the 17th resistance R17
For the feedback output end of current-sharing module 01i, the second end of the 17th resistance R17 is connect with the first power supply VAA, the 5th resistance R5's
The current sampling port that second end and the first end of the 6th resistance R6 are current-sharing module 01i, the second end and the 6th of the 7th resistance R7
The second end of resistance R6 is the equalizing voltage end of current-sharing module 01i, the of the second end of the 14th resistance R14 and the 4th capacitor C4
The connection of two ends, the second end of the second end of third capacitor C3, the second end of the second capacitor C2 and thirteenth resistor R13 are connected to altogether
Power ground.
It is described further below in conjunction with current-sharing module 01i of the working principle to LED constant pressure current-equalizing system shown in Fig. 4:
If it is female that equalizing voltage (voltage of the second end of the second end and the 6th resistance R6 of the 7th resistance R7) is less than stream
Line voltage is then checked the mark the 7th operational amplifier U6 of amplification and rear class by the 5th operational amplifier U5 and the 6th operational amplifier U6
After amplification, in the output voltage and current equalizing bus bar voltage of the available DC power supply of the output end of the 7th operational amplifier U6
N times of error amplified voltage value, and output voltage is positive, the voltage value that can thus raise, to improve current-sharing module 01i
Feedback output end (second end of the 16th resistance R16 and the first end of the 17th resistance R17) output voltage, increase direct current
The output voltage in source.
Fig. 5 shows a kind of module knot of the current-sharing module 01i in LED constant pressure current-equalizing system provided in an embodiment of the present invention
Composition, for ease of description, only parts related to embodiments of the present invention are shown, and details are as follows:
Current-sharing module 01i includes the first amplifier 01i-1, the second amplifier 01i-2, bus control module 01i-3, clamp
Module 01i-4 and third amplifier 01i-5；
The input terminal of the output end of first amplifier 01i-1 and the second amplifier 01i-2, the input for clamping module 01i-4
The second input terminal of end and third amplifier 01i-5, the output end and bus control module 01i-3 of the second amplifier 01i-2
The second input/output terminal, clamp module 01i-4 input/output terminal and third amplifier 01i-5 first input end connect
It connects；
The first input end and the second input terminal of first amplifier 01i-1 collectively form the current sample of current-sharing module 01i
End, the first input/output terminal of bus control module 01i-3 are the weighing apparatus voltage end of current-sharing module 01i, third amplifier 01i-5's
Output end is the feedback output end of current-sharing module 01i；
First amplifier 01i-1 detects the output voltage of DC power supply 02i corresponding with current-sharing module 01i, and according to defeated
Voltage generates first voltage out, and the second amplifier 01i-2 generates second voltage, bus control module 01i-3 according to first voltage
Equalizing voltage is generated according to second voltage, clamp module 01i-4 clamps equalizing voltage, and multiple equalizing voltage generations are flowed
Busbar voltage, third amplifier 01i-5 are compared first voltage and current equalizing bus bar voltage, and generate feedback signal to adjust
The output voltage of the corresponding DC power supply 02i of current-sharing module 01i.
Fig. 6 is shown, and a kind of example corresponding with the current-sharing module 01i in the LED constant pressure current-equalizing system that Fig. 5 is provided is electric
Line structure figure, for ease of description, only parts related to embodiments of the present invention are shown, and details are as follows:
First amplifier 01i-1 includes the 8th operational amplifier U8, adjustable resistance R01, the 5th capacitor C5, the 18th resistance
R18, the 19th resistance R19, the 20th resistance R20, the 21st resistance R21, the electricity of the 23rd resistance R23 and the 24th
Hinder R24；8th operational amplifier U8 positive input is connect with the first end of the 18th resistance R18, the 8th operational amplifier U8
Reverse input end is connect with the first end of the first end of the 20th resistance R20 and the 21st resistance R21, the 18th resistance R18
Second end, that the first end of the first end of the 19th resistance R19 and the 5th capacitor C5 are the first amplifier 01i-1 is first defeated
Enter end, the second end of the second end of the 20th resistance R20, the second end of the 19th resistance R19 and the 5th capacitor C5 is first
The second input terminal of amplifier 01i-1, it is the first end of the 8th operational amplifier U8 output end and the 24th resistance R24, adjustable
The first end of the adjustable side of resistance R01, the first fixing end of adjustable resistance R01 and the 23rd resistance R23 connects, and the 20th
The second end of one resistance R21 is connect with the second end of the second fixing end of adjustable resistance R01 and the 23rd resistance R23, and second
The second end of 14 resistance R24 is the output end of the first amplifier 01i-1.
Second amplifier 01i-2 include the 9th operational amplifier U9, the 25th resistance R25, the 26th resistance R26 with
And the 27th resistance R27；The positive input of 9th operational amplifier U9 is connect with the first end of the 25th resistance R25,
The second end of 25th resistance R25 is the input terminal of the second amplifier 01i-2, the reverse input end of the 9th operational amplifier U9
It is connect with the first end of the output end of the 9th operational amplifier U9 and the 27th resistance R27, the second of the 27th resistance R27
End is the output end of second operational amplifier.
Bus control module 01i-3 includes the first field-effect tube M1, the second field-effect tube M2 and the 28th resistance
R28；The drain electrode of first field-effect tube M1 is the first input/output terminal of bus control module 01i-3, the first field-effect tube M1's
Source electrode is connect with the drain electrode of the second field-effect tube M2, and the source electrode of the second field-effect tube M2 is the second of bus control module 01i-3
The first end of the grid of input/output terminal, the grid of the first field-effect tube M1 and the second field-effect tube M2, the 28th resistance R28
And female line control signal connection, the second end of the 28th resistance R28 are connect with second source VBB.
Clamping module 01i-4 includes the second diode D2, the 6th capacitor C6, the electricity of the 29th resistance R29 and the 30th
Hinder R30；The cathode of the first end of 29th resistance R29 and the second diode D2 are the input/output terminal for clamping module 01i-4,
The second end of 29th resistance R29 and third power vd D, the first end of the 6th capacitor C6, the second diode D2 anode with
And the 30th resistance R30 first end connection, the second end of the second end of the 6th capacitor C6 and the 30th resistance R30 are clamp mould
The input terminal of block 01i-4.
Third amplifier 01i-5 includes the tenth operational amplifier U10, the 7th capacitor C7, the 31st resistance R31 and the
32 resistance R32；The positive input of tenth operational amplifier U10 be third amplifier 01i-5 first input end, the tenth
The first end of the reverse input end of operational amplifier U10, the first end of the 7th capacitor C7 and the 31st resistance R31 is third
The first end of the second input terminal of amplifier 01i-5, the output end of the tenth operational amplifier U10 and the 32nd resistance R32,
The second end of seven capacitor C7 and the second end connection of the 31st resistance R31, the second end of the 32nd resistance R32 is third
The output end of amplifier 01i-5.
It is described further below in conjunction with current-sharing module 01i of the working principle to LED constant pressure current-equalizing system shown in fig. 6:
The sampling resistor both ends of the input termination DC power supply of 8th operational amplifier U8, amplified current signal is all the way
It exports to the inverting input terminal of the tenth operational amplifier U10, another way is by giving current equalizing bus bar after the 9th operational amplifier U9 amplification
With the normal phase input end of the tenth operational amplifier U10.If the output electric current of some DC power supply is less than other DC power supplies,
The normal phase input end voltage of tenth operational amplifier U10 will be above inverting input terminal voltage, the output of the tenth operational amplifier U10
It holds voltage to increase, that is, increases the output voltage of DC power supply, that is, increase output electric current.If the output electric current of some DC power supply
Greater than other DC power supplies, the normal phase input end voltage of the tenth operational amplifier U10 will be less than inverting input terminal voltage, and the tenth
The output end voltage of operational amplifier U10 reduces, that is, reduces the output voltage of DC power supply, that is, reduces output electric current.To reach
To stream purpose.
In conclusion the embodiment of the present invention includes multiple current-sharing modules, multiple DC power supplies and LED load mould by it
Block；Multiple current-sharing modules connect one to one with multiple DC power supplies, and each current-sharing module detects corresponding DC power supply
Output voltage, and equalizing voltage is generated according to output voltage, multiple equalizing voltages that multiple current-sharing modules generate are exported to equal
For stream bus to generate current equalizing bus bar voltage, each current-sharing module generates feedback signal according to current equalizing bus bar voltage to adjust its correspondence
DC power supply output voltage, therefore can be improved the stream effect of the parallel connection power supply of LED load module.
There are also a kind of LED constant temperature systems similar with LED constant pressure current-equalizing system, keep the DC power supply of multiple parallel connections
Identical operating temperature is simultaneously powered LED load module, specific as follows:
It includes multiple DC power supplies, and multiple sensor modules and a microprocessor are multiple, passes through each sensor
The temperature of the corresponding each DC power supply of each sensor is obtained, then mean temperature, last micro process are obtained by microprocessor
Device determines the feedback signal of each DC power supply according to the temperature of mean temperature and each DC power supply, each DC power supply according to
Corresponding feedback signal adjusts output voltage/output electric current.The foregoing is merely illustrative of the preferred embodiments of the present invention, and
Not to limit the present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention,
It should be included within protection scope of the present invention.
Claims (12)
1. a kind of LED constant pressure current-equalizing system, which is characterized in that the LED constant pressure current-equalizing system includes: multiple current-sharing modules, more
A DC power supply and LED load module；
The multiple current-sharing module connects one to one with the multiple DC power supply, wherein
The current sampling port and feedback output end of each current-sharing module respectively with the sampling end of corresponding DC power supply and anti-
Input terminal connection is presented,
The equalizing voltage end of the multiple current-sharing module is connected to current equalizing bus bar altogether,
The cathode output end of the multiple DC power supply is connect with the first end of the LED load module,
The second end of the cathode output end of the multiple DC power supply and the LED load module is connected to power ground altogether；
Each current-sharing module detects the output voltage of corresponding DC power supply, and is generated according to the output voltage
Weigh voltage, and multiple equalizing voltages that the multiple current-sharing module generates are exported to the current equalizing bus bar to generate current equalizing bus bar electricity
Pressure, each current-sharing module generate feedback signal according to the current equalizing bus bar voltage to adjust corresponding DC power supply
Output voltage；And
Wherein one in the multiple current-sharing module includes: to flow chip, optocoupler, first capacitor, first resistor, the second electricity
Resistance, 3rd resistor and the 4th resistance；
The first end of the current detecting end for flowing chip and the first resistor is described in the multiple current-sharing module
One current sampling port,
The power end for flowing chip is connect with the first end of the second resistance,
The current regulation end for flowing chip is connect with the light emitting diode negative pole end of the optocoupler,
The current regulation setting end for flowing chip is connect with the first end of the 3rd resistor,
The external capacitor end for flowing chip is connect with the first end of the first capacitor,
The bus end for flowing chip is one equalizing voltage end in the multiple current-sharing module,
The ground terminal of chip, the second end of the first resistor, described the described are flowed in the bus reference end for flowing chip
The first end of the first end of three resistance, the emitter of the optocoupler and the 4th resistance is connected to power ground altogether,
The second end of the second resistance is connect with the light emitting diode anode of the optocoupler,
One feedback output end in extremely the multiple current-sharing module of the current collection of the optocoupler.
2. LED constant pressure current-equalizing system as described in claim 1, which is characterized in that one in the multiple current-sharing module is
Flow module is main current-sharing module, the multiple current-sharing module in addition to main current-sharing module be from current-sharing module, it is the multiple
Multiple equalizing voltages that flow module generates are exported to the current equalizing bus bar to generate current equalizing bus bar voltage, each current-sharing module
Feedback signal is generated according to the current equalizing bus bar voltage to adjust the output voltage of corresponding DC power supply specifically:
The equalizing voltage of the main current-sharing module is exported to current equalizing bus bar to generate current equalizing bus bar voltage, each from current-sharing module ratio
More corresponding equalizing voltage and current equalizing bus bar voltage, and it is described each corresponding from current-sharing module to adjust to generate feedback signal
DC power supply output voltage.
3. LED constant pressure current-equalizing system as claimed in claim 2, which is characterized in that the equilibrium electricity in the multiple current-sharing module
Pressing a maximum current-sharing module is main current-sharing module, and the multiple current-sharing module in addition to main current-sharing module is from stream mould
Block.
4. LED constant pressure current-equalizing system as claimed in claim 2, which is characterized in that one in the multiple current-sharing module is
Flow module is set as main current-sharing module, and the multiple current-sharing module in addition to main current-sharing module is set to from stream mould
Block.
5. LED constant pressure current-equalizing system as described in claim 1, which is characterized in that the multiple current-sharing module generates multiple
Equalizing voltage is exported to the current equalizing bus bar to generate current equalizing bus bar voltage, and each current-sharing module is according to the current equalizing bus bar
Voltage generates feedback signal to adjust the output voltage of its corresponding DC power supply specifically:
Multiple equalizing voltages that multiple current-sharing modules generate are exported to the current equalizing bus bar to generate current equalizing bus bar voltage, described every
A current-sharing module is compared corresponding equalizing voltage and the current equalizing bus bar voltage, and generate feedback signal with
Adjust the output voltage of the corresponding DC power supply of each current-sharing module.
6. a kind of LED constant pressure current-equalizing system, which is characterized in that the LED constant pressure current-equalizing system includes: multiple current-sharing modules, more
A DC power supply and LED load module；
The multiple current-sharing module connects one to one with the multiple DC power supply, wherein
The current sampling port and feedback output end of each current-sharing module respectively with the sampling end of corresponding DC power supply and anti-
Input terminal connection is presented,
The equalizing voltage end of the multiple current-sharing module is connected to current equalizing bus bar altogether,
The cathode output end of the multiple DC power supply is connect with the first end of the LED load module,
The second end of the cathode output end of the multiple DC power supply and the LED load module is connected to power ground altogether；
Each current-sharing module detects the output voltage of corresponding DC power supply, and is generated according to the output voltage
Weigh voltage, and multiple equalizing voltages that the multiple current-sharing module generates are exported to the current equalizing bus bar to generate current equalizing bus bar electricity
Pressure, each current-sharing module is compared corresponding equalizing voltage and the current equalizing bus bar voltage, and generates
Feedback signal is to adjust the output voltage of corresponding DC power supply；And
Wherein one in the multiple current-sharing module includes: that the 5th operational amplifier, the 6th operational amplifier, the 7th operation are put
Big device, the second capacitor, third capacitor, the 4th capacitor, the 5th capacitor, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance,
9th resistance, the tenth resistance, eleventh resistor, twelfth resistor, thirteenth resistor, the 14th resistance, the 15th resistance, the tenth
Six resistance and the 17th resistance；
The first of the positive input of 5th operational amplifier and the first end of the third capacitor and the 5th resistance
End connection,
The first of the reverse input end of 5th operational amplifier and the first end of the 8th resistance and the tenth resistance
End connection,
The output end and the second end of the 8th resistance and the first end of the eleventh resistor of 5th operational amplifier
Connection,
The first of the positive input of 6th operational amplifier and the first end of second capacitor and the 7th resistance
End connection,
The second of the reverse input end of 6th operational amplifier and the first end of the 9th resistance and the tenth resistance
End connection,
The output end and the second end of the 9th resistance and the first end of the twelfth resistor of 6th operational amplifier
Connection,
The first of the second end of the reverse input end of 7th operational amplifier and the eleventh resistor, the 4th capacitor
The connection of the first end of end and the 15th resistance,
The positive input of 7th operational amplifier and the second end of the twelfth resistor and the thirteenth resistor
First end connection,
The output end of 7th operational amplifier and first end, the second end of the 15th resistance of the 14th resistance
And the first end connection of the 16th resistance,
The second end of 16th resistance and the first end of the 17th resistance are described in the multiple current-sharing module
One feedback output end,
The second end of 17th resistance is connect with the first power supply, the second end of the 5th resistance and the 6th resistance
First end is one current sampling port in the multiple current-sharing module,
The second end of 7th resistance and the second end of the 6th resistance are one in the multiple current-sharing module
Equalizing voltage end,
The second end of 14th resistance is connect with the second end of the 4th capacitor,
The second end of the second end of the third capacitor, the second end of second capacitor and the thirteenth resistor is connected to altogether
Power ground.
7. a kind of LED constant pressure current-equalizing system, which is characterized in that the LED constant pressure current-equalizing system includes: multiple current-sharing modules, more
A DC power supply and LED load module；
The multiple current-sharing module connects one to one with the multiple DC power supply, wherein
The current sampling port and feedback output end of each current-sharing module respectively with the sampling end of corresponding DC power supply and anti-
Input terminal connection is presented,
The equalizing voltage end of the multiple current-sharing module is connected to current equalizing bus bar altogether,
The cathode output end of the multiple DC power supply is connect with the first end of the LED load module,
The second end of the cathode output end of the multiple DC power supply and the LED load module is connected to power ground altogether；
Each current-sharing module detects the output voltage of corresponding DC power supply, and is generated according to the output voltage
Weigh voltage, and multiple equalizing voltages that the multiple current-sharing module generates are exported to the current equalizing bus bar to generate current equalizing bus bar electricity
Pressure, each current-sharing module is compared corresponding equalizing voltage and the current equalizing bus bar voltage, and generates
Feedback signal is to adjust the output voltage of corresponding DC power supply；And
Wherein one in the multiple current-sharing module includes: the first amplifier, the second amplifier, bus control module, clamp
Module and third amplifier；
The input terminal of the output end of first amplifier and second amplifier, the input terminal of the clamp module and institute
The second input terminal connection of third amplifier is stated,
Second input/output terminal of the output end of second amplifier and the bus control module, the clamp module it is defeated
Enter the first input end connection of output end and the third amplifier；
The first input end and the second input terminal of first amplifier collectively form described one in the multiple current-sharing module
A current sampling port,
First input/output terminal of the bus control module is one equalizing voltage in the multiple current-sharing module
End,
The output end of the third amplifier is one feedback output end in the multiple current-sharing module；
First amplifier detection and the output voltage of one corresponding DC power supply in the multiple current-sharing module,
And first voltage is generated according to the output voltage,
Second amplifier generates second voltage according to the first voltage,
The bus control module generates equalizing voltage according to the second voltage,
The clamp module clamps equalizing voltage,
The multiple equalizing voltage generates the current equalizing bus bar voltage,
The third amplifier is compared the first voltage and the current equalizing bus bar voltage, and generates feedback signal to adjust
Save the output voltage of one corresponding DC power supply in the multiple current-sharing module.
8. LED constant pressure current-equalizing system as claimed in claim 7, which is characterized in that first amplifier includes: the 8th operation
Amplifier, adjustable resistance, the 5th capacitor, the 18th resistance, the 19th resistance, the 20th resistance, the 21st resistance, the 20th
Three resistance and the 24th resistance；
The 8th operational amplifier positive input is connect with the first end of the 18th resistance,
The first end and the 21st resistance of the 8th operational amplifier reverse input end and the 20th resistance
First end connection,
Second end, the first end of the 19th resistance and the first end of the 5th capacitor of 18th resistance are institute
The first input end of the first amplifier is stated,
Second end, the second end of the 19th resistance and the second end of the 5th capacitor of 20th resistance are institute
The second input terminal of the first amplifier is stated,
The first end of 8th operational amplifier output terminal and the 24th resistance, the adjustable resistance adjustable side,
First fixing end of the adjustable resistance and the connection of the first end of the 23rd resistance,
The of the second end of 21st resistance and the second fixing end of the adjustable resistance and the 23rd resistance
The connection of two ends,
The second end of 24th resistance is the output end of first amplifier.
9. LED constant pressure current-equalizing system as claimed in claim 7, which is characterized in that second amplifier includes: the 9th operation
Amplifier, the 25th resistance, the 26th resistance and the 27th resistance；
The positive input of 9th operational amplifier is connect with the first end of the 25th resistance,
The second end of 25th resistance is the input terminal of second amplifier,
The reverse input end of 9th operational amplifier and the output end and the described 27th of the 9th operational amplifier
The first end of resistance connects,
The second end of 27th resistance is the output end of second amplifier.
10. LED constant pressure current-equalizing system as claimed in claim 7, which is characterized in that the bus control module includes: first
Field-effect tube, the second field-effect tube and the 28th resistance；
The drain electrode of first field-effect tube is the first input/output terminal of the bus control module,
The source electrode of first field-effect tube is connect with the drain electrode of second field-effect tube,
The source electrode of second field-effect tube is the second input/output terminal of the bus control module,
The grid of the grid of first field-effect tube and second field-effect tube, the 28th resistance first end with
And female line control signal connection,
The second end of 28th resistance is connect with second source VBB.
11. LED constant pressure current-equalizing system as claimed in claim 7, which is characterized in that the clamp module includes: the two or two pole
Pipe, the 6th capacitor, the 29th resistance and the 30th resistance；
The first end of 29th resistance and the cathode of second diode are the input/output terminal of the clamp module,
The second end and third power vd D, the first end of the 6th capacitor, second diode of 29th resistance
Positive and described 30th resistance first end connection,
The second end of 6th capacitor and the second end of the 30th resistance are the input terminal of the clamp module.
12. LED constant pressure current-equalizing system as claimed in claim 7, which is characterized in that the third amplifier includes: the tenth fortune
Calculate amplifier, the 7th capacitor, the 31st resistance and the 32nd resistance；
The positive input of tenth operational amplifier is the first input end of the third amplifier,
The reverse input end of tenth operational amplifier, the first end of the 7th capacitor and the 31st resistance
First end is the second input terminal of the third amplifier,
The output end of tenth operational amplifier and first end, the second end of the 7th capacitor of the 32nd resistance
And the second end connection of the 31st resistance,
The second end of 32nd resistance is the output end of the third amplifier.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710209405.XA CN108668403B (en) | 2017-03-31 | 2017-03-31 | A kind of LED constant pressure current-equalizing system |
| PCT/CN2018/081237 WO2018177389A1 (en) | 2017-03-31 | 2018-03-30 | Led constant-voltage current-sharing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710209405.XA CN108668403B (en) | 2017-03-31 | 2017-03-31 | A kind of LED constant pressure current-equalizing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108668403A CN108668403A (en) | 2018-10-16 |
| CN108668403B true CN108668403B (en) | 2019-12-03 |
Family
ID=63675243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710209405.XA Active CN108668403B (en) | 2017-03-31 | 2017-03-31 | A kind of LED constant pressure current-equalizing system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108668403B (en) |
| WO (1) | WO2018177389A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109755935A (en) * | 2019-01-31 | 2019-05-14 | 洛阳隆盛科技有限责任公司 | A kind of power sources in parallel equalizing control circuit |
| CN110994585B (en) * | 2019-12-31 | 2021-10-15 | 浙江中控技术股份有限公司 | Power supply system |
| CN114430596A (en) * | 2021-12-23 | 2022-05-03 | 深圳市崧盛电子股份有限公司 | Current-sharing control system and method of LED power supply and multifunctional lamp pole |
| CN116780734B (en) * | 2023-08-23 | 2023-11-14 | 洛仪科技(苏州)有限公司 | DC power supply parallel control circuit based on extremum control and control method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447253A (en) * | 2011-12-30 | 2012-05-09 | 洛阳理工学院 | Direct current switching power supply parallel system current sharing control method and control device |
| CN204559417U (en) * | 2015-03-06 | 2015-08-12 | 深圳奥特迅电力设备股份有限公司 | A kind of circuit improving multi-power module parallel operation current-sharing |
| CN205070421U (en) * | 2015-09-30 | 2016-03-02 | 深圳市瀚强科技股份有限公司 | Power source device |
| CN105514964A (en) * | 2014-09-26 | 2016-04-20 | 中车大连电力牵引研发中心有限公司 | Current-sharing circuit and current-sharing control method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6958552B2 (en) * | 2002-04-10 | 2005-10-25 | Adc Dsl Systems, Inc. | Failsafe power oring with current sharing |
| US8207711B2 (en) * | 2008-08-15 | 2012-06-26 | Analog Modules, Inc. | Biphase laser diode driver and method |
-
2017
- 2017-03-31 CN CN201710209405.XA patent/CN108668403B/en active Active
-
2018
- 2018-03-30 WO PCT/CN2018/081237 patent/WO2018177389A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447253A (en) * | 2011-12-30 | 2012-05-09 | 洛阳理工学院 | Direct current switching power supply parallel system current sharing control method and control device |
| CN105514964A (en) * | 2014-09-26 | 2016-04-20 | 中车大连电力牵引研发中心有限公司 | Current-sharing circuit and current-sharing control method |
| CN204559417U (en) * | 2015-03-06 | 2015-08-12 | 深圳奥特迅电力设备股份有限公司 | A kind of circuit improving multi-power module parallel operation current-sharing |
| CN205070421U (en) * | 2015-09-30 | 2016-03-02 | 深圳市瀚强科技股份有限公司 | Power source device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018177389A1 (en) | 2018-10-04 |
| CN108668403A (en) | 2018-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108668403B (en) | A kind of LED constant pressure current-equalizing system | |
| CN105355704B (en) | Symmetric double PIN balances photodetector | |
| CN203572583U (en) | Temperature transforming circuit and temperature transformer | |
| CN108205100A (en) | A kind of circuit checker | |
| CN106505835B (en) | Voltage clamp circuit and DC-DC converter | |
| CN212518763U (en) | Power supply current-sharing controller | |
| CN104795728B (en) | A kind of semiconductor laser adjustable constant-flow drive circuit with temperature-compensating | |
| CN108957100A (en) | A kind of current detection means | |
| CN103592991A (en) | Power limitation type protection circuit used for double-pole linear voltage regulator | |
| CN209088518U (en) | A kind of hardware Over Current Protection System for bidirectional current output | |
| CN113272663B (en) | Constant current source sampling circuit and method | |
| CN208537614U (en) | Current detection means | |
| JP2014062755A (en) | Thermal flow sensor, and flow detection signal generation method by the same | |
| CN109709400B (en) | Constant current source circuit | |
| CN208015580U (en) | A kind of dynamic clamp circuit | |
| CN205986665U (en) | Adjustable high voltage output power supply circuit of positive and negative continuous linearity of integration | |
| CN204301911U (en) | A kind of oil pressure sensor circuit | |
| CN214893754U (en) | Semiconductor chip internal temperature detection circuit and air conditioner | |
| CN105529905B (en) | The DC power supply and power discharge equipment of playing function are unloaded with fast power | |
| CN213547106U (en) | Current limiting circuit, acquisition circuit and acquisition equipment | |
| CN204168254U (en) | Seismic wave detects preposition nonlinear amplifier | |
| CN209913787U (en) | Addition circuit for reducing absolute value difference of positive and negative output voltages | |
| CN209198532U (en) | A kind of zero cross detection circuit | |
| CN113655831B (en) | Full-analog PID TEC constant temperature circuit | |
| CN219145228U (en) | Current equalizing circuit, power module and power system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |