CN201774716U - Constant-current driving power source for LED illumination - Google Patents
Constant-current driving power source for LED illumination Download PDFInfo
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- CN201774716U CN201774716U CN2010202932775U CN201020293277U CN201774716U CN 201774716 U CN201774716 U CN 201774716U CN 2010202932775 U CN2010202932775 U CN 2010202932775U CN 201020293277 U CN201020293277 U CN 201020293277U CN 201774716 U CN201774716 U CN 201774716U
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Abstract
The utility model discloses a constant-current driving power source for LED illumination, which is used for driving a high-power LED for illumination, and comprises a main power conversion loop and a control loop. The main power conversion loop includes an alternating-current input end, a full-bridge rectification circuit, an active power factor boosting converter, a flyback DC/DC converter and a direct-current output terminal which are sequentially connected; the control loop includes a high-power factor correction control circuit, an auxiliary power source, a flyback DC/DC conversion control circuit and a current feedback control circuit which are sequentially connected; an output end of the high-power factor correction control circuit is connected with an input end of the active power factor boosting converter; an output end of the flyback DC/DC conversion control circuit is connected with an input end of the flyback DC/DC converter; and an output end of the current feedback control circuit is connected with an input end of the direct-current output terminal. The constant-current driving power source has the advantages of wide-range voltage input, high efficiency, high power density and complete protection function.
Description
Technical field
The utility model relates to a kind of device for converting electric energy, relates in particular to the device for converting electric energy that a kind of driving LED is used to throw light on and has direct current constant current output, high conversion efficiency.Be applicable to that global power supply voltage range input, high stable are exported electric current, the application that driving LED is used to throw light on that is used for that the high power density requirement is arranged of power supply is exported in the direct current pressure limiting.
Background technology
LED (Lighting Emitting Diode) is a light-emitting diode, is a kind of semiconductor solid luminescence device.It is to utilize the solid semiconductor chip as luminescent material, by charge carrier compound energy of emitting surplus takes place and cause photo emissions in semiconductor, and is directly luminous.The LED illuminating product utilizes LED as the produced ligthing paraphernalia of light source exactly.LED be called as the 4th generation lighting source or green light source, have characteristics such as energy-saving and environmental protection, the life-span is long, volume is little, can be widely used in fields such as various indications, demonstration, decoration, backlight, general lighting and urban landscape.Led light source adopts DC driven, and the electric light power transfer is near 100% for super low-power consumption (0.03 watt-1 watt of single tube), and the equal illumination effect is more energy-conservation more than 80% than conventional light source.Led light source belongs to the solid cold light source, and epoxy encapsulation does not have loosening part yet in the lamp body, do not have easily shortcomings such as burning, heat deposition, light decay of filament light-emitting, can reach 50,000 to 100,000 hours useful life, and is longer more than 10 times than the conventional light source life-span.Led light source belongs to typical green illumination light source.Do not have ultraviolet ray and infrared ray in the spectrum, heat is low and do not have stroboscopic, and is radiationless, and discarded object is recyclable, do not pollute not contain mercury element, and cold light source can safe touch.
Also relate to following prior art in the utility model:
The DC/DC notion is meant that with a fixing dc voltage conversion be variable direct voltage, this technology is widely used in the infinitely variable speeds and the control of trolley bus, subway train, electric motor car, make above-mentioned control obtain the performance of quickening steadily, responding fast simultaneously, and receive the effect of saves energy simultaneously.But replace rheostat saves energy (20～30) % with DC chopper.DC chopper can not only play pressure regulation (Switching Power Supply), can also play the effect that suppresses grid side harmonic current noise effectively simultaneously.
The EMC filter, have another name called " Electro Magnetic Compatibility filter ", be mainly used in instrument and meter, the automation control system, be used for suppressing and eliminating the strong electromagnetic and the electric spark interference at industrial automation system scene, proofread and correct the field instrumentation instrument, guarantee the safe and reliable operation of automation control system.
In view of this, utility model people in this area provides a kind of global power supply voltage range input, high stable of being applicable to export the LED illumination constant-current driving power supply that has high power density to require of electric current, direct current pressure limiting output power supply.
The utility model content
In view of this; technical problem to be solved in the utility model provides a kind of LED illumination constant-current driving power supply, its have the high stable direct current export electric current and pressure limiting function, global input voltage range, high efficiency, high power density, the complete characteristics of defencive function.
For achieving the above object, the utility model provides a kind of LED illumination to use constant-current driving power supply, is used to drive high-power LED illumination, comprises Power Conversion major loop and control loop; Described Power Conversion major loop comprises that successively full bridge rectifier that an ac input end connecting, one will import industrial-frequency alternating current and be converted to Rectified alternating current, one are anti-sharp DC/DC converter and a dc output end of high-frequency impulse with the active power factor booster converter, that pulsating dc voltage is converted to stable DC voltage with the stable DC voltage transitions; Described control loop comprises a high power factor correction control circuit that connects successively, an accessory power supply, an anti-sharp DC/DC conversion control circuit and a Current Feedback Control circuit; The output of described high power factor correction control circuit connects the input of described active power factor booster converter, the described anti-output that swashs the DC/DC conversion control circuit connects the described anti-input that swashs the DC/DC converter, and the output of described Current Feedback Control circuit connects the input of described dc output end.
Preferably, described Power Conversion major loop also comprises an EMC filter, and its input connects described ac input end, and its output connects described full bridge rectifier.
Preferably, described Power Conversion major loop also comprises a lightning protection surge absorbing circuit, and its input connects described EMC filter, and its output connects described full bridge rectifier.
Preferably, described Power Conversion major loop also comprises an anti-start impulse current circuit, and its input connects described active power factor booster converter, and its output connects the described anti-DC/DC converter that swashs.
Preferably, described Power Conversion major loop comprises that also a paired pulses carries out the rectifier filter circuit of smothing filtering, and its input connects the described anti-DC/DC converter that swashs, and its output connects described dc output end.
Preferably, described control loop also comprises current foldback circuit, connects the described anti-DC/DC conversion control circuit that swashs.
Preferably, described control loop also comprises overvoltage crowbar, connects the described anti-DC/DC conversion control circuit that swashs.
Preferably, described control loop also comprises overheating protection circuit, connects the described anti-DC/DC conversion control circuit that swashs.
Preferably, described EMC filter is the filter of absorbing high-frequency noise in the following frequency range of 30MHz.
Preferably, described accessory power supply is respectively to described high power factor correction control circuit and the described anti-DC/DC conversion control circuit power supply that swashs.
Owing to used above technology, the utility model compared with prior art, the utility model LED illumination has been adopted electric current continuous type active power factor booster converter and anti-sharp DC/DC converter technology with the Power Conversion major loop in the constant-current driving power supply, and simple in circuits is reliable, the conversion efficiency height; Control circuit is finished input voltage feed forward; imported, under-voltage protection, output overvoltage, overcurrent protection, output short circuit protection; defencive functions such as overtemperature prote, thus constitute wide-range voltage input, high efficiency, high power density, the complete LED illumination constant-current driving power supply of defencive function.
Technique effect to design of the present utility model, concrete structure and generation is described further, to understand the purpose of this utility model, feature and effect fully.
Description of drawings
Fig. 1 is the module connection block diagram of LED illumination of the present utility model with constant-current driving power supply.
Embodiment
As shown in Figure 1, constant-current driving power supply is used in LED illumination of the present utility model, is used to drive high-power LED illumination, comprises Power Conversion major loop 1 and control loop 2; Described Power Conversion major loop 1 comprises that successively full bridge rectifier 14 that an ac input end connecting 11, one will import industrial-frequency alternating current and be converted to Rectified alternating current, one are anti-sharp DC/DC converter 17 and a dc output end 19 of high-frequency impulse with the active power factor booster converter 16, that pulsating dc voltage is converted to stable DC voltage with the stable DC voltage transitions; Described control loop 2 comprise successively a high power factor correction control circuit connecting 101, accessory power supply 102, one instead swash DC/DC conversion control circuit 103 and a Current Feedback Control circuit 104; The output of described high power factor correction control circuit 101 connects the input of described active power factor booster converter 16, the described anti-output that swashs DC/DC conversion control circuit 103 connects the described anti-input that swashs DC/DC converter 17, and the output of described Current Feedback Control circuit 104 connects the input of described dc output end 19.
Wherein, described Power Conversion major loop 1 also comprises an EMC filter 12, lightning protection surge absorbing circuit 13, an anti-start impulse current circuit 15 and a rectifier filter circuit 18.The input of described EMC filter 12 connects described ac input end 11, and the output of described EMC filter 12 connects described full bridge rectifier 14.The input of described lightning protection surge absorbing circuit 13 connects described EMC filter 12, and the output of described lightning protection surge absorbing circuit 13 connects described full bridge rectifier 14.The input of described anti-start impulse current circuit 15 connects described active power factor booster converter 16, and the output of described anti-start impulse current circuit 15 connects the described anti-DC/DC converter 17 that swashs.The input of described rectifier filter circuit 18 connects the described anti-DC/DC converter 17 that swashs, and the output of described rectifier filter circuit 18 connects described dc output end 19.Described EMC filter 12 is filters of absorbing high-frequency noise in the following frequency range of 30MHz.Described accessory power supply 102 is respectively to described high power factor correction control circuit 101 and described anti-DC/DC conversion control circuit 103 power supplies that swash.Described control loop 2 comprises that also current foldback circuit 105, overvoltage crowbar 106 and overheating protection circuit 107 connect the described anti-DC/DC conversion control circuit 103 that swashs respectively.
Embodiment of the present utility model is as follows:
As shown in Figure 1, the utility model provides a kind of LED illumination to use constant-current driving power supply, comprises Power Conversion major loop 1 and control loop 2.
Described Power Conversion major loop 1 comprises ac input end 11, input EMC filter 12, lightning protection surge absorbing circuit 13, full-bridge rectification 14, anti-start impulse current circuit 15, active power factor booster converter 16, instead swashs DC/DC power inverter 17, rectifier filter circuit 18 and dc output end 19, and described circuit is linked in sequence.
Described control loop 2 comprises high power factor correction control circuit 101, accessory power supply 102, anti-sharp DC/DC conversion control circuit 103, Current Feedback Control 104, overcurrent protection 105, overvoltage protection 106 and overtemperature protection 107.Wherein High Power Factor control circuit 101 is connected with active power factor booster converter 16; Accessory power supply 102 is made up of the output of active power factor booster converter 16 and the auxiliary winding of main transformer, is connected with anti-sharp DC/DC converter controller 104 with High Power Factor controller 101 respectively; The anti-output that swashs DC/DC conversion control circuit 103 is connected to the anti-input that swashs DC/DC converter 17, and the discharging chain of Current Feedback Control unit is received the anti-input that swashs DC/DC converter 17.Over-current protecting unit, Overvoltage protecting unit and over-temperature protection unit are connected with anti-sharp DC/DC converter 17 respectively.
The utility model LED illumination comprises Power Conversion major loop 1 with constant-current driving power supply, it by ac input end 11, input EMC filter 12, lightning protection surge absorbing circuit 13, full-bridge rectification 14, anti-start impulse current circuit 15, active power factor booster converter 16, instead swash DC/DC converter 17, rectifier filter circuit 18 and dc output end 19 etc. and form.
Ac input end refers to J1, has enough dielectric voltage withstand intensity and safe spacing, and its connection has anti-seismic performance and anti-salt fog performance.
Input EMC filter has the performance of absorbing high-frequency noise in the following frequency range of 30MHz, restrains the influence of charger high-frequency noise to ac power supply line; 2 Y capacitor C 3 and C4 and common mode inductance LF1 and LF2 form 2 grades of filters respectively and are used to remove common mode disturbances, and 2 X2 capacitor C 1 and C2 and differential mode inductance L1 are used for the filtering differential mode interference.
The lightning protection surge absorbing circuit mainly is made up of Zinc-oxide piezoresistor RV1, is used to absorb the surge of lightning induction surge and the generation in service of other inductive load, and the protection late-class circuit exempts from damage.
Bridge heap BG1 converts the industrial-frequency alternating current of input to the direct current of pulsation.
Start impulse current current-limiting circuit is made of the SD9 thermistor.SD9 thermistor resistance is high-impedance state when start, thereby has limited the start surge current.Be the low-resistance shape because the resistance of electric current by thermistor SD9 descends after the circuit operate as normal, anti-start impulse current current limliting process finishes.
Electric current continuous type active power factor boost conversion circuit mainly adopts resistance R 11 to form by boost inductance L2, high frequency power electronic switch Q1, Ultrafast recovery diode D3, electrochemical capacitor E1 and PFC electric current; The drive signal of Q1 is from high power factor correction controller U1; Electric current flows through inductive energy storage among the L2 when the Q1 conducting.The electric energy that stores among the L2 when Q1 ends charges to E1 by D3; The electric current of L2 of flowing through under the control of high power factor correction controller is continuous, and the voltage of E1 also remains on the direct voltage of setting (380VDC), and this voltage is not subjected to the influence of input voltage fluctuation and load conversion.
Anti-swash the DC/DC power inverter mainly by high-frequency semiconductor power device Q50, power main transformer T1, be linked in sequence, the direct voltage of APFC output is converted to high frequency, the controlled potential pulse of pulsewidth by the isolated buck electronic transformer, realizes function with the isolation of prime main circuit, step-down.
Rectifier filter circuit mainly comprises high pressure software feature fast recovery diode D80 and big capacity electrochemical capacitor E70.When the end of the same name of T1 is that timing main transformer secondary powers to the load by the loop that D80 and E70 form.When the end of the same name of T1 main transformer secondary when negative stops to power to the load.
The sub-J2 of dc output end has enough dielectric voltage withstand intensity and safe spacing, and its connection has anti-seismic performance and anti-salt fog performance.
By above-mentioned Power Conversion major loop 1, make output voltage be transformed to satisfactory voltage of direct-flow voltage regulation.
The utility model LED illumination also comprises power control system loop 2 with constant-current driving power supply, and control loop 2 comprises high power factor correction control circuit 101, accessory power supply 102, anti-sharp DC/DC conversion control circuit 103, Current Feedback Control 104, overcurrent protection 105, overvoltage protection 106 and overtemperature protection 107.Wherein the high power factor correction control circuit is made up of the power factor correction controller that adopts average-current mode and some passive devices.Accessory power supply comprises auxiliary winding and some other passive device composition of auxiliary winding of L2 and T1 transformer; Anti-sharp DC/DC conversion control circuit comprises that mainly anti-sharp DC/DC transform controller and peripheral circuit, output current, voltage control feedback circuit, output current limiting Control and Feedback circuit and high accuracy low temperature float reference voltage source; Controller adopts current working mode, and peripheral circuit mainly comprises soft start capacitor, oblique wave compensation circuit, oscillator outer meeting resistance and electric capacity, delay adjustments resistor network, error amplifier capacitance-resistance phase compensating network.
The Current Feedback Control circuit mainly comprises output current resistance sampling network, output reference current setting network, comparator and capacitance-resistance phase compensating network thereof.
Owing to used above technology, the utility model LED illumination has been adopted electric current continuous type active power factor booster converter and anti-sharp DC/DC converter technology with the Power Conversion major loop in the constant-current driving power supply, and simple in circuits is reliable, the conversion efficiency height; Control circuit is finished input voltage feed forward; imported, under-voltage protection, output overvoltage, overcurrent protection, output short circuit protection; defencive functions such as overtemperature prote, thus constitute wide-range voltage input, high efficiency, high power density, the complete LED illumination constant-current driving power supply of defencive function.
More than describe preferred embodiment of the present utility model in detail.The ordinary skill that should be appreciated that this area need not creative work and just can make many modifications and variations according to design of the present utility model.Therefore, all technical staff in the art comply with design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be in claim protection range of the present utility model.
Claims (10)
1. constant-current driving power supply is used in a LED illumination, is used to drive high-power LED illumination, it is characterized in that: comprise Power Conversion major loop (1) and control loop (2);
Described Power Conversion major loop (1) comprises that successively full bridge rectifier (14) that the ac input end (11) that connects, one will import industrial-frequency alternating current and be converted to Rectified alternating current, one are the anti-sharp DC/DC converter (17) and a dc output end (19) of high-frequency impulse with the active power factor booster converter (16), that pulsating dc voltage is converted to stable DC voltage with the stable DC voltage transitions;
Described control loop (2) comprises successively that the high power factor correction control circuit (101) that connects, an accessory power supply (102), one are anti-and swashs a DC/DC conversion control circuit (103) and a Current Feedback Control circuit (104)
The output of described high power factor correction control circuit (101) connects the input of described active power factor booster converter (16), the described anti-output that swashs DC/DC conversion control circuit (103) connects the described anti-input that swashs DC/DC converter (17), and the output of described Current Feedback Control circuit (104) connects the input of described dc output end (19).
2. LED illumination constant-current driving power supply according to claim 1, it is characterized in that: described Power Conversion major loop (1) also comprises an EMC filter (12), its input connects described ac input end (11), and its output connects described full bridge rectifier (14).
3. LED illumination constant-current driving power supply according to claim 2, it is characterized in that: described Power Conversion major loop (1) also comprises a lightning protection surge absorbing circuit (13), its input connects described EMC filter (12), and its output connects described full bridge rectifier (14).
4. LED illumination constant-current driving power supply according to claim 3, it is characterized in that: described Power Conversion major loop (1) also comprises an anti-start impulse current circuit (15), its input connects described active power factor booster converter (16), and its output connects the described anti-DC/DC converter (17) that swashs.
5. LED illumination constant-current driving power supply according to claim 4, it is characterized in that: described Power Conversion major loop (1) comprises that also a paired pulses carries out the rectifier filter circuit of smothing filtering (18), its input connects the described anti-DC/DC converter (17) that swashs, and its output connects described dc output end (19).
6. use constant-current driving power supply according to any described LED illumination in the claim 1 to 5, it is characterized in that: described control loop (2) also comprises current foldback circuit (105), connects the described anti-DC/DC conversion control circuit (103) that swashs.
7. use constant-current driving power supply according to any described LED illumination in the claim 1 to 5, it is characterized in that: described control loop (2) also comprises overvoltage crowbar (106), connects the described anti-DC/DC conversion control circuit (103) that swashs.
8. use constant-current driving power supply according to any described LED illumination in the claim 1 to 5, it is characterized in that: described control loop (2) also comprises overheating protection circuit (107), connects the described anti-DC/DC conversion control circuit (103) that swashs.
9. use constant-current driving power supply according to any described LED illumination in the claim 1 to 5, it is characterized in that: described EMC filter (12) is the filter of absorbing high-frequency noise in the following frequency range of 30MHz.
10. use constant-current driving power supply according to any described LED illumination in the claim 1 to 5, it is characterized in that: described accessory power supply (102) is respectively to described high power factor correction control circuit (101) and described anti-DC/DC conversion control circuit (103) power supply that swashs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202932775U CN201774716U (en) | 2010-08-16 | 2010-08-16 | Constant-current driving power source for LED illumination |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202932775U CN201774716U (en) | 2010-08-16 | 2010-08-16 | Constant-current driving power source for LED illumination |
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| CN201774716U true CN201774716U (en) | 2011-03-23 |
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| CN2010202932775U Expired - Fee Related CN201774716U (en) | 2010-08-16 | 2010-08-16 | Constant-current driving power source for LED illumination |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607816A (en) * | 2013-11-13 | 2014-02-26 | 江苏宏力光电科技有限公司 | LED power source with synchronous rectification |
| CN105071661A (en) * | 2015-08-12 | 2015-11-18 | 安徽蓝盾光电子股份有限公司 | Rail transit wide-voltage-input power supply circuit |
| CN108110851A (en) * | 2018-01-12 | 2018-06-01 | 武汉中电通信有限责任公司 | A kind of intelligent charger |
| CN108233735A (en) * | 2018-01-02 | 2018-06-29 | 江西先能新能源科技股份有限公司 | A kind of 30KW charging modules |
-
2010
- 2010-08-16 CN CN2010202932775U patent/CN201774716U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607816A (en) * | 2013-11-13 | 2014-02-26 | 江苏宏力光电科技有限公司 | LED power source with synchronous rectification |
| CN105071661A (en) * | 2015-08-12 | 2015-11-18 | 安徽蓝盾光电子股份有限公司 | Rail transit wide-voltage-input power supply circuit |
| CN108233735A (en) * | 2018-01-02 | 2018-06-29 | 江西先能新能源科技股份有限公司 | A kind of 30KW charging modules |
| CN108110851A (en) * | 2018-01-12 | 2018-06-01 | 武汉中电通信有限责任公司 | A kind of intelligent charger |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110323 Termination date: 20140816 |
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| EXPY | Termination of patent right or utility model |