CN106488615A - A kind of high efficient and reliable LED light group and its control method - Google Patents
A kind of high efficient and reliable LED light group and its control method Download PDFInfo
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- CN106488615A CN106488615A CN201611140820.6A CN201611140820A CN106488615A CN 106488615 A CN106488615 A CN 106488615A CN 201611140820 A CN201611140820 A CN 201611140820A CN 106488615 A CN106488615 A CN 106488615A
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- 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]
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- 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]
- H05B45/10—Controlling the intensity of the light
- H05B45/14—Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The present invention relates to a kind of high efficient and reliable LED light group and its control method, including a main power source and coupled auxiliary power module, LED module；Described LED module includes the LED module of several series connection, and every group of LED module is all parallel with one in order to prevent the over-pressed bypass circuit of LED module inefficacy open circuit.The present invention solves the practical problems such as power factor (PF) in traditional design is low, efficiency is low, interference is big, cost height.
Description
Technical field
The present invention relates to LED light group field, more particularly to a kind of high efficient and reliable LED light group and its control method.
Background technology
At present, as shown in figure 1, LED Chinese lamp on the market, all in independently-powered mode, is equivalent to many independent little work(
Rate LED forms a high-powered LED lamp, and this scheme has shortcomings:1st, because this scheme is to use small-power power, power supply
PFC is extremely low, and alternating current is big, line loss is big.2nd, because power is little, output voltage is low, power-efficient is also just low.3rd, safety with
EMC requirement is low, and because this power section power supply is subject to power supply Cost Competition, power supply is relatively easy with the process of EMC in safety, and power supply is done
Disturb big.It is vulnerable to interference in the communication of single lamp control application aspect.4th, power supply and light source distance are excessively near, cause power supply heat sinking effect
Difference, short life.
Content of the invention
In view of this, it is an object of the invention to provide a kind of high efficient and reliable LED light group and its control method, solve tradition
The practical problem such as in design, power factor (PF) is low, efficiency is low, interference is big, high cost, power quality no ensure.
The present invention adopts below scheme to realize：A kind of high efficient and reliable LED light group, including a main power source and coupled
Auxiliary power module, LED module；Described LED module includes the LED module of several series connection, and every group of LED module is all parallel with one
In order to prevent the over-pressed bypass circuit of LED module inefficacy open circuit.
Further, described overvoltage bypass circuit includes one first IGCT, the negative electrode of described first IGCT and LED mould
The input of group, the anode of one second IGCT are connected, the negative electrode of the anode of described first IGCT and described second IGCT,
The triggering end of one the 3rd IGCT is connected, and the negative electrode of described 3rd IGCT is connected with the outfan of described LED module.
Further, described every group of LED module is the LED light group gone here and there and combine, concretely 9 strings 9 LED light group simultaneously.
Further, the quantitative range of the LED module of described series connection is one group to nine groups, the scope of its series LED pressure drop
For 20V-300V.
Further, described main power source includes an EMI module being electrically connected with city, the outfan and of described EMI module
The input of the first rectification module is connected, and the outfan of described first rectification module is defeated through a PFC module and a half-bridge module
Enter end to be connected, the outfan of described half-bridge module is connected with the input of one second rectification module through a transformator, described second
The outfan of rectification module is connected with described LED module；The outfan of described second rectification module also with a feedback of voltage and current
The input of module is connected, and the outfan of described feedback of voltage and current module is connected with one first optical coupling module, described voltage electricity
The outfan of stream feedback module is also connected with the input of a PWM control module, the outfan of described PWM control module and one the
Two optical coupling modules are connected；Described first optical coupling module is also all connected with described half-bridge module with the second optical coupling module；Described half-bridge
The input of circuit is also connected with described auxiliary power module.
Further, described auxiliary power module includes an accessory power supply driving chip, described accessory power supply driving chip
Vdd terminal be connected with the Vcc end of the IC chip in half-bridge circuit described in main power source, one end of one first electric capacity C32, described
The other end ground connection of one electric capacity C32；The FB end of described accessory power supply driving chip and one end of first resistor R36, one second
One end of resistance R37 is connected, the other end ground connection of described second resistance R37；The CB end and one of described accessory power supply driving chip
One end of 3rd resistor R38, one end of one the 4th resistance R39 are connected, and the other end of described 3rd resistor R38 is electric with the described 4th
The other end of resistance R39 is all grounded；The other end of described first resistor R36 is through one the 5th resistance R44's and one the 6th resistance R45
One end is connected, and the other end of described 6th resistance R45 is connected with the anode of one first diode D14, described first diode D14
Negative electrode be connected with Vcc end；Two SW ends of described accessory power supply driving chip the first winding with a transformer primary respectively
Same Name of Ends be connected, the different name end of described first winding is connected with the Vbus end of half-bridge circuit described in main power source, the described 6th
The other end of resistance R45 is also connected with the Same Name of Ends of the second winding of described transformer primary, the different name end of described second winding
Ground connection, and is connected with one end of one second electric capacity CY5, the described other end of the second electric capacity CY5 and the secondary of described transformator around
The different name end of group is connected, the anode of the Same Name of Ends of the vice-side winding of described transformator and one second diode D10, one the 7th resistance
One end of R32 is connected, and the other end of described 7th resistance R32 is connected with one end of one the 3rd electric capacity C28, described 3rd electric capacity
The negative electrode of the other end of C28 and described second diode D10, the positive pole of one the 4th electric capacity C27, the positive pole of one the 5th electric capacity C29,
One end of one the 8th resistance R33 is connected；The negative pole of described 4th electric capacity C27, the negative pole of described 5th electric capacity C29, the described 8th
The other end of resistance R33 is all connected with the other end of described second electric capacity CY5.
Further, model 8366 power supply chip of described accessory power supply driving chip.
Further, the model NCL30051 chip of described IC chip.
Further, the two ends of described 8th resistance R33 export the power supply of a 3.3V, wireless in order to remotely control with one
Communication module is connected.
The present invention also adopts following methods to realize：A kind of control method of high efficient and reliable LED light group, comprises the following steps：
Step S1：Described auxiliary power module is that the IC chip in described half-bridge circuit is powered, in order to ensure the normal of main power source
Power supply, the outfan of the second rectification module in described main power source is powered for described LED module；
Step S2：When any one LED module open circuit in described LED module, electric current is through being connected in parallel on the overvoltage at this LED module two ends
Bypass circuit reaches next LED module；
Step S3：When there being multiple LED module open circuits in described LED module, the voltage at described LED module two ends is through described voltage electricity
Stream feedback module feeds back to described half-bridge circuit with described first optical coupling module；
Step S4：PWM control module in described main power source is adjusted for described half-bridge circuit through described second optical coupling module,
And then described LED module is dimmed.
Further, in described step S1, it is that in main power source, IC chip is powered by described auxiliary power module, Neng Goubao
The stability of testimony electricity；In the prior art, if the multiple LED module open circuits in LED light group, the pressure drop at LED light group two ends
Reduce, cause the startup undertension of IC chip in half-bridge circuit, lead to main power source cannot work, therefore adopt described auxiliary electricity
Source module is that IC chip in described half-bridge circuit is powered it is ensured that the normal power supply to LED light group for the main power source, and is not subject to LED
The impact of lamp group.
Compared to prior art, in the LED light group in the present invention, every lampet is all designed with LED module lamp, independent LED mould
With connection in series-parallel integrated mode, independent LED module design becomes fixed voltage, electric current, more every LED by LED light group to the lamp bead of group
Module lamp is together in series, and finally concentrates the efficient power designing and powers to LED light group.The shape to go here and there and combine for the LED module
Formula arranges lamp bead, even if there being lamp bead to lose efficacy, nor affects on this module bright light.The whole lamp of this LED light group is coupled in series, and carries
High whole modulating voltage, reduces electric current, improves power-efficient.In order to avoid module open circuit may bring whole lamp Problem of Failure, to mould
Group controllable silicon overvoltage bypass circuit in parallel, once there being module to open a way, voltage raises triggering controlled silicon conducting, and electric current will be from being close to road
Controllable silicon walk, do not affect other module bright lights, and be capable of the effect of wide pressure output.The present invention solves traditional design
The practical problem such as middle power factor (PF) is low, efficiency is low, interference is big, high cost, power quality no ensure.
Brief description
Fig. 1 is the circuit diagram of the Chinese lamp of prior art.
Fig. 2 is the circuit diagram of the present invention.
Fig. 3 is the circuit module schematic diagram of the LED module of the present invention.
Fig. 4 is the circuit diagram of the LED module of the present invention.
Fig. 5 is the main power circuit figure of the present invention.
Fig. 6 is the circuit diagram of the auxiliary power module of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment the present invention will be further described.
The present embodiment provide a kind of high efficient and reliable LED light group, as shown in Figures 2 to 6, including a main power source and with its phase
Auxiliary power module even, LED module；Described LED module includes the LED module of several series connection, and every group of LED module is all in parallel
Have one in order to prevent the over-pressed bypass circuit of LED module inefficacy open circuit.
In the present embodiment, described overvoltage bypass circuit includes one first IGCT, the negative electrode of described first IGCT with
The input of LED module, the anode of one second IGCT are connected, the anode of described first IGCT and described second IGCT
Negative electrode, the triggering end of one the 3rd IGCT are connected, and the negative electrode of described 3rd IGCT is connected with the outfan of described LED module.
In the present embodiment, described every group of LED module is the LED light group gone here and there and combine, concretely 9 strings 9 LED simultaneously
Group.
In the present embodiment, the quantitative range of the LED module of described series connection is one group to nine groups, the scope of its series connection pressure drop
For 20V-300V.
In the present embodiment, described main power source includes an EMI module being electrically connected with city, the outfan of described EMI module
It is connected with the input of one first rectification module, the outfan of described first rectification module is through a PFC module and a half-bridge module
Input be connected, the outfan of described half-bridge module is connected with the input of one second rectification module through a transformator, described
The outfan of the second rectification module is connected with described LED module；The outfan of described second rectification module also with a voltage x current
The input of feedback module is connected, and the outfan of described feedback of voltage and current module is connected with one first optical coupling module, described electricity
The outfan of current voltage feedback module is also connected with the input of a PWM control module, the outfan of described PWM control module with
One second optical coupling module is connected；Described first optical coupling module is also all connected with described half-bridge module with the second optical coupling module；Described
The input of half-bridge circuit is also connected with described auxiliary power module.
In the present embodiment, described auxiliary power module includes an accessory power supply driving chip, and described accessory power supply drives
The Vdd terminal of chip is connected with the Vcc end of the IC chip in half-bridge circuit described in main power source, one end of one first electric capacity C32, institute
State the other end ground connection of the first electric capacity C32；The FB end of described accessory power supply driving chip and one end of first resistor R36, one
One end of second resistance R37 is connected, the other end ground connection of described second resistance R37；The CB end of described accessory power supply driving chip
It is connected with one end of 3rd resistor R38, one end of one the 4th resistance R39, the other end of described 3rd resistor R38 and described the
The other end of four resistance R39 is all grounded；The other end of described first resistor R36 is through one the 5th resistance R44 and one the 6th resistance
One end of R45 is connected, and the other end of described 6th resistance R45 is connected with the anode of one first diode D14, described one or two pole
The negative electrode of pipe D14 is connected with Vcc end；Two SW ends of described accessory power supply driving chip respectively with a transformer primary first
The Same Name of Ends of winding is connected, and the different name end of described first winding is connected with the Vbus end of half-bridge circuit described in main power source, described
The other end of the 6th resistance R45 is also connected with the Same Name of Ends of the second winding of described transformer primary, described second winding different
Name end ground connection, and is connected with one end of one second electric capacity CY5, the other end of described second electric capacity CY5 and the pair of described transformator
The different name end of side winding is connected, the anode of the Same Name of Ends of the vice-side winding of described transformator and one second diode D10, the 7th
One end of resistance R32 is connected, and the other end of described 7th resistance R32 is connected with one end of one the 3rd electric capacity C28, described 3rd electricity
The other end of appearance C28 is with the negative electrode of described second diode D10, the positive pole of one the 4th electric capacity C27, one the 5th electric capacity C29 just
Pole, one end of one the 8th resistance R33 are connected；The negative pole of described 4th electric capacity C27, the negative pole of described 5th electric capacity C29, described
The other end of eight resistance R33 is all connected with the other end of described second electric capacity CY5.
In the present embodiment, model 8366 power supply chip of described accessory power supply driving chip.
In the present embodiment, the model NCL30051 chip of described IC chip.
In the present embodiment, the two ends of described 8th resistance R33 export the power supply of a 3.3V, with one in order to remotely control
Wireless communication module is connected.
In the present embodiment, a kind of control method of high efficient and reliable LED light group, comprises the following steps：
Step S1：Described auxiliary power module is that the IC chip in described half-bridge circuit is powered, in order to ensure the normal of main power source
Power supply, the outfan of the second rectification module in described main power source is powered for described LED module；
Step S2：When any one LED module open circuit in described LED module, electric current is through being connected in parallel on the overvoltage at this LED module two ends
Bypass circuit reaches next LED module；
Step S3：When there being multiple LED module open circuits in described LED module, the voltage at described LED module two ends is through described voltage electricity
Stream feedback module feeds back to described half-bridge circuit with described first optical coupling module；
Step S4：PWM control module in described main power source is adjusted for described half-bridge circuit through described second optical coupling module,
And then described LED module is dimmed.
In the present embodiment, in described step S1, it is that in main power source, IC chip is powered by described auxiliary power module, energy
The enough stability ensureing power supply；In the prior art, if the multiple LED module open circuits in LED light group, LED light group two ends
Pressure drop reduces, and causes the startup undertension of IC chip in half-bridge circuit, leads to main power source cannot work, and therefore adopts described auxiliary
Help the IC chip that power module is in described half-bridge circuit to power it is ensured that the normal power supply to LED light group for the main power source, and be not subject to
The impact of LED light group.
In the present embodiment, the power supply plan of this LED light group is design specialized LED module（The lamp bead of LED module is with spy
Fixed connection in series-parallel pattern composition, makes LED module voltage, electric current fix）, more special LED module is connected in series to certain voltage（Series connection
Module quantity determines according to head of Chinese style lamp quantity）, then powered to all LED modules with the special efficient rate power supply designing.
In addition, combining the controller of PFC (PFC) and half-bridge resonance in this LED light group, optimize for offline LED illumination.
All characteristics required for this high efficiency of device integration realization and compact LED driver.It comprises a critical conduction mode
(CrM) boost pressure controller and a half-bridge resonance controller, and built-in 600 V high side gate driver.Half bridge section is using fixation
Frequency works.The feedback signal that this device generates according to controller outside, by adjusting the output voltage of PFC section come current stabilization/pressure,
And it is integrated with the enable input of PFC feedback pin, PFC feedback control loop open-circuit-protection, and the over-pressed and under-voltage testing mechanism of PFC.Power supply
Have also been devised PWM dimming function, secondary energy-saving can be realized to this LED light group integrally adjusting light.In addition, in order to improve drive efficiency
And reliability, for the special accessory power supply power supply source of controller design of this half-bridge resonance.
In sum, in the LED light group in the present invention, every lampet is all designed with LED module lamp, the lamp of independent LED module
With connection in series-parallel integrated mode, independent LED module design becomes fixed voltage, electric current, more every LED module lamp by LED light group to pearl
It is together in series, finally the efficient power designing is concentrated and power to LED light group.LED module is arranged in the form of going here and there and combining
Lamp bead, even if there being lamp bead to lose efficacy, nor affects on this module bright light.The whole lamp of this LED light group is coupled in series, and improves whole lamp
Voltage, reduces electric current, improves power-efficient.In order to avoid module open circuit may bring whole lamp Problem of Failure, to modules in parallel
Controllable silicon overvoltage bypass circuit, once there being module to open a way, voltage raises triggering controlled silicon conducting, and electric current is by from being close to the controlled of road
Silicon is walked, and does not affect other module bright lights, and is capable of the effect of wide pressure output.
The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to scope of the present invention patent with
Modify, all should belong to the covering scope of the present invention.
Claims (10)
1. a kind of high efficient and reliable LED light group it is characterised in that：Including a main power source and coupled auxiliary power module,
LED module；Described LED module includes the LED module of several series connection, and every group of LED module is all parallel with one in order to prevent LED mould
The over-pressed bypass circuit of group inefficacy open circuit.
2. a kind of high efficient and reliable LED light group according to claim 1 it is characterised in that：Described overvoltage bypass circuit includes
One first IGCT, the negative electrode of described first IGCT is connected with the anode of the input of LED module, one second IGCT, institute
State the anode of the first IGCT and the triggering end of the negative electrode of described second IGCT, one the 3rd IGCT is connected, described is trimorphism
The negative electrode of brake tube is connected with the outfan of described LED module.
3. a kind of high efficient and reliable LED light group according to claim 1 it is characterised in that：Described every group of LED module is to go here and there simultaneously
In conjunction with LED light group.
4. a kind of high efficient and reliable LED light group according to claim 1 it is characterised in that：The number of the LED module of described series connection
Amount scope is one group to nine groups.
5. a kind of high efficient and reliable LED light group according to claim 1 it is characterised in that：Described main power source includes one and city
The EMI module being electrically connected, the outfan of described EMI module is connected with the input of one first rectification module, described first rectification
The outfan of module is connected with the input of a half-bridge module through a PFC module, and the outfan of described half-bridge module is through a transformation
Device is connected with the input of one second rectification module, and the outfan of described second rectification module is connected with described LED module；Described
The outfan of the second rectification module is also connected with the input of a feedback of voltage and current module, described feedback of voltage and current module
Outfan is connected with one first optical coupling module, and the outfan of described feedback of voltage and current module is also defeated with a PWM control module
Enter end to be connected, the outfan of described PWM control module is connected with one second optical coupling module；Described first optical coupling module and the second light
Coupling module is also all connected with described half-bridge module；The input of described half-bridge circuit is also connected with described auxiliary power module.
6. a kind of high efficient and reliable LED light group according to claim 1 it is characterised in that：Described auxiliary power module includes
IC core in half-bridge circuit described in one accessory power supply driving chip, the Vdd terminal of described accessory power supply driving chip and main power source
The Vcc end of piece, one end of one first electric capacity C32 are connected, the other end ground connection of described first electric capacity C32；Described accessory power supply drives
The FB end of dynamic chip is connected with one end of one end of first resistor R36, second resistance R37, described second resistance R37 another
One end is grounded；The CB end of described accessory power supply driving chip and one end of 3rd resistor R38, one end of one the 4th resistance R39
It is connected, the other end of described 3rd resistor R38 is all grounded with the other end of described 4th resistance R39；Described first resistor R36
The other end is connected with one end of one the 6th resistance R45 through one the 5th resistance R44, the other end and of described 6th resistance R45
The anode of the first diode D14 is connected, and the negative electrode of described first diode D14 is connected with Vcc end；Described accessory power supply drives core
Two SW ends of piece are connected with the Same Name of Ends of the first winding of a transformer primary respectively, the different name end of described first winding and master
The Vbus end of half-bridge circuit described in power supply is connected, the other end of described 6th resistance R45 also with described transformer primary the
The Same Name of Ends of two windings is connected, the different name end ground connection of described second winding, and is connected with one end of one second electric capacity CY5, described
The other end of the second electric capacity CY5 is connected with the different name end of the vice-side winding of described transformator, the vice-side winding of described transformator
Same Name of Ends is connected with the anode of one second diode D10, one end of one the 7th resistance R32, the other end of described 7th resistance R32
It is connected with one end of one the 3rd electric capacity C28, the negative electrode of the other end of described 3rd electric capacity C28 and described second diode D10,
The positive pole of the 4th electric capacity C27, the positive pole of one the 5th electric capacity C29, one end of one the 8th resistance R33 are connected；Described 4th electric capacity C27
Negative pole, the negative pole of described 5th electric capacity C29, described 8th resistance R33 the other end all another with described second electric capacity CY5
End is connected.
7. a kind of high efficient and reliable LED light group according to claim 6 it is characterised in that：Described accessory power supply driving chip
Model 8366 power supply chip.
8. a kind of high efficient and reliable LED light group according to claim 6 it is characterised in that：The model of described IC chip
NCL30051 chip.
9. a kind of high efficient and reliable LED light group according to claim 6 it is characterised in that：The two ends of described 8th resistance R33
Export the power supply of a 3.3V, be connected in order to the wireless communication module of remotely control with one.
10. a kind of control method of high efficient and reliable LED light group according to claim 5 it is characterised in that：Walk including following
Suddenly：
Step S1：Described auxiliary power module is that the IC chip in described half-bridge circuit is powered, in order to ensure the normal of main power source
Power supply, the outfan of the second rectification module in described main power source is powered for described LED module；
Step S2：When any one LED module open circuit in described LED module, electric current is through being connected in parallel on the overvoltage at this LED module two ends
Bypass circuit reaches next LED module；
Step S3：When there being multiple LED module open circuits in described LED module, the voltage at described LED module two ends is through described voltage electricity
Stream feedback module feeds back to described half-bridge circuit with described first optical coupling module；
Step S4：PWM control module in described main power source is adjusted for described half-bridge circuit through described second optical coupling module,
And then described LED module is dimmed.
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| CN201611140820.6A CN106488615B (en) | 2016-12-12 | 2016-12-12 | A kind of high efficient and reliable LED light group and its control method |
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| CN201611140820.6A CN106488615B (en) | 2016-12-12 | 2016-12-12 | A kind of high efficient and reliable LED light group and its control method |
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| Publication number | Publication date |
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| CN106488615B (en) | 2019-06-14 |
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