CN201374836Y - Special power supply for energy saving LED lamp - Google Patents

Special power supply for energy saving LED lamp Download PDF

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Publication number
CN201374836Y
CN201374836Y CN200920113799U CN200920113799U CN201374836Y CN 201374836 Y CN201374836 Y CN 201374836Y CN 200920113799 U CN200920113799 U CN 200920113799U CN 200920113799 U CN200920113799 U CN 200920113799U CN 201374836 Y CN201374836 Y CN 201374836Y
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China
Prior art keywords
circuit
voltage
pin
power
resistance
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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.)
Expired - Fee Related
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CN200920113799U
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Chinese (zh)
Inventor
陈少华
李耀明
来荧
郑方耀
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HANGZHOU WLLED LIGHTING SCIENCE AND TECHNOLOGY Co Ltd
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HANGZHOU WLLED LIGHTING SCIENCE AND TECHNOLOGY Co Ltd
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Priority to CN200920113799U priority Critical patent/CN201374836Y/en
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Publication of CN201374836Y publication Critical patent/CN201374836Y/en
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    • 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
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

The utility model relates to a special power supply for an energy saving LED lamp. The technical problem solved by the utility model is that a special power supply for an energy saving LED lamp is provided, aiming to improve the efficiency of an AC/DC (alternating current/direct current) voltage converter so that high-power LED series lamps are more energy-saving and efficient in actual use. The technical solution solving the problem is as follows: the special power supply comprises a power supply filter circuit, an isolating transforming and power output circuit, a power factor rectifier and a voltage control and constant current control circuit, wherein the power supply filter circuit rectifies the input 220V city electrical filtering into pulse direct current voltage and outputs the voltage outside through the isolating transforming and power output circuit; and the voltage control and constant current control circuit extracts the output voltage signals and current signals for coupling and then feeds back the signals to the power factor rectifier, thereby realizing constant voltage control and constant current control. The special power supply can be used in high-power LED series lamps.

Description

Special electric power for energy saving type LED lamp
Technical field
The utility model relates to a kind of special electric power for energy saving type LED lamp.Be applicable to the great power LED serial lamps and lanterns.
Background technology
Various in the market LED illuminating lamps have the incandescent lamp that replacement uses for a long time always and the gesture of fluorescent lamp greatly, yet traditional AC/DC (ac/dc) electric pressure converter, its input circuit generally adopts full-bridge diode rectification mode or phase control rectifier mode.The deficiency that this traditional electric pressure converter exists is: 1) harm electrical network, in the process of input high-voltage capacitor charging, traditional AC/DC electric pressure converter can draw high peak current from electrical network, input electric current and alternating voltage are all distorted, make the angle of flow of rectifier approximately dwindle about 2/3, current impulse has become non-sinusoidal burst pulse.Power factor (PF) reduces (greatly between 0.5-0.65) greatly.This phenomenon has endangered the operate as normal of electrical network, makes loss sharp increase on the 220V electrical network conveying circuit, has wasted a large amount of electric energy; 2) efficient is low, if increase the one-level Active PFC at traditional AC/DC electric pressure converter front end the 220V civil power is boosted to 400V left and right sides direct voltage, again by one-level DC/DC power transfer, finishes the purpose of isolating and rising (falling) pressure.And general typical power factor correction circuit (PFC), its efficiency eta 1About 90%, and isolated power conversion efficiency η 2Generally be not more than 90%, by calculating like this: η 1* η 2≤ 81%.
Summary of the invention
The technical problems to be solved in the utility model is: a kind of special electric power for energy saving type LED lamp is provided, is intended to improve the efficient of AC/DC (ac/dc) electric pressure converter, make great power LED serial lamps and lanterns efficient energy-saving more in actual use.
The technical scheme that the utility model adopted is: special electric power for energy saving type LED lamp, it is characterized in that this power source special by electric source filter circuit, isolate transformation and power output circuit, Active PFC and voltage control and constant-current control circuit and form, electric source filter circuit becomes pulsating dc voltage with the 220V civil power filter rectification of input, outwards export through isolating transformation and power output circuit again, voltage control and constant-current control circuit by extracting output voltage signal and current signal again Coupled Feedback realize that to Active PFC constant voltage control and constant current control.
Described isolation transformation and power output circuit comprise transformer TR 1, diode D 5, resistance R 10, capacitor C 7And capacitor C 8, transformer TR wherein 1Play buffer action, resistance R 10And capacitor C 7After the series connection again with diode D 5Compose in parallel rectification circuit, capacitor C 8Be filtering.
Described Active PFC is mainly an integrated circuit (IC) 1, wherein: integrated circuit (IC) 1Pin 7 pass through resistance R 8Meet field effect transistor Q 1Grid, Q 1Drain electrode meet transformer TR 1Primary coil N 1, Q 1Source electrode and IC 1Pin 4 parallel connections after resistance R 9Ground connection, IC 1Pin 5 pass through resistance R 7With diode D 1, capacitor C 5Be connected, simultaneously again with TR 1The NF winding join IC 1Pin 1 and pin 8 and pressure limiting circuit R 4, R 5Link to each other IC 1Pin 3 and input voltage sample circuit R 2, R 3, C 6Link to each other IC 1Pin 2 with receive optocoupler PC 1-2Connect IC 1Pin 6 ground connection.
Described voltage control and constant-current control circuit are mainly by operational amplifier U 1And U 2And peripheral circuit composition, wherein U 1And U 2Output respectively through diode D 7And D 6, again through resistance R 17Optocoupler PC is penetrated in sending and receiving 1-1, U 1An input pin meet bleeder circuit R 19, R 20Be used to take out output voltage signal, U 2An input pin pass through resistance R 12Extract the sampling current of output.
Described electric source filter circuit is by L 1, L 2, C 1, C 2And C 3Form EMI filtering link, again BR through being constituted by a diode 1Full-bridge rectification becomes pulsed dc voltage.
The beneficial effects of the utility model are: the utility model has only just realized that with a power factor corrector one-level power transfer isolation between input and output and ascending, descending press, and (186-260V) makes power factor (PF) 〉=0.97 in the voltage range of broad, and efficiency eta=η 1〉=89%, compared with prior art increased by 8% efficient.8% efficient means the saving of a large amount of non-ferrous metal and electric energy, therefore the utlity model has wide promotion and application prospect.
Description of drawings
Fig. 1 is a circuit block diagram of the present utility model.
Fig. 2 is an electrical schematic diagram of the present utility model.
Embodiment
As shown in Figure 1, the present embodiment power source special is made up of electric source filter circuit 1, isolation transformation and power output circuit 2, Active PFC 3 and voltage control and constant-current control circuit 4.Electric source filter circuit 1 becomes pulsating dc voltage with the 220V civil power filter rectification of input, outwards export through isolating transformation and power output circuit 2 again, voltage control and constant-current control circuit 4 by extracting output voltage signal and current signal again Coupled Feedback realize that to Active PFC 3 voltage control and constant current control.
As shown in Figure 2, described isolation transformation and power output circuit 2 comprise transformer TR 1, diode D 5, resistance R 10, capacitor C 7And capacitor C 8Wherein: transformer TR 1Play buffer action, resistance R 10And capacitor C 7After the series connection again with diode D 5Compose in parallel rectification circuit, capacitor C 8Be filter capacitor, and power output thus.
Active PFC 3 among Fig. 2 is mainly an integrated circuit (IC) 1, wherein: integrated circuit (IC) 1Pin 7 pass through resistance R 8Meet field effect transistor Q 1Grid, Q 1Drain electrode meet transformer TR 1Primary coil N 1, Q 1Source electrode and IC 1Pin 4 parallel connections after resistance R 9Ground connection.IC 1Pin 5 pass through resistance R 7With diode D 1, capacitor C 5Be connected, simultaneously again with TR 1The NF winding join.IC 1Pin 1 and pin 8 and pressure limiting circuit R 4, R 5Link to each other.IC 1Pin 3 and input voltage sample circuit R 2, R 3, C 6Link to each other.IC 1Pin 2 with receive optocoupler PC 1-2Connect.IC 1Pin 6 ground connection.
Voltage control among Fig. 2 and constant-current control circuit 4 are mainly by operational amplifier U 1And U 2And peripheral circuit composition, wherein U 1And U 2Output respectively through diode D 7And D 6, again through resistance R 17Optocoupler PC is penetrated in sending and receiving 1-1, U 1An input pin meet bleeder circuit R 19, R 20, be used to take out output voltage signal, U 2An input pin pass through resistance R 12Extract the sampling current of output.
Described electric source filter circuit 1 is by L 1, L 2, C 1, C 2And C 3Form EMI filtering link, again BR through being constituted by a diode 1Full-bridge rectification becomes pulsed dc voltage to use for the back level.
The operation principle of present embodiment is: the 220V civil power is through F 1Enter L 1, L 2, C 1, C 2And C 3The EMI filtering link of forming becomes pulsating direct current by the BR1 full-bridge rectification, and this pulsating direct current is through R 6To C 5C is worked as in charging 5Both end voltage reaches IC 1IC during starting resistor 1Pin 7 output pulsed drive Q 1,, work as Q because this circuit is the inverse-excitation type working method 1TR during conducting 1The middle energy of storing is EL=1/2LI 2, Q when driving pulse disappears 1Change closed condition into by conducting state.TR 1The counter-rotating of primary coil polarity of voltage, this portion of energy is fed to output loop by secondary coil, simultaneously TR 1The NF winding pass through D 1To C 5Charging makes IC 1Operating voltage supply is endlessly arranged, N 3Winding passes through D 3To U 2Power supply provides U 2Working power, R 2, R 3, C 6Finish the voltage sampling to the input pulsating direct current, this is the key that realizes Active PFC.R 4, R 5Finish pressure limiting effect to output voltage.U 2The unit passes through R 12Extract the sampling current of output, by control PC 1-1Electric current again through PC 1-2Control IC 12 pin voltages realize constant current control (constant current accuracy can reach 1%); U 1The unit in-phase end passes through R 19, R 20Dividing potential drop is taken out output voltage signal, and is same by control PC 1-1Electric current again through PC 1-2Control output voltage is constant.And work as U 1When entering constant current state, U 2Automatically withdraw from pressure constant state, output voltage only depends on the single led pressure drop voltage and the product Uout=Uo * n of LED number.

Claims (5)

1, a kind of special electric power for energy saving type LED lamp, it is characterized in that: this power source special is by electric source filter circuit (1), isolate transformation and power output circuit (2), Active PFC (3) and voltage control and constant-current control circuit (4) are formed, electric source filter circuit (1) becomes pulsating dc voltage with the 220V civil power filter rectification of input, again through isolating the outwards output of transformation and power output circuit (2), voltage control and constant-current control circuit (4) by extracting output voltage signal and current signal again Coupled Feedback realize that to Active PFC (3) constant voltage is controlled and constant current is controlled.
2, special electric power for energy saving type LED lamp according to claim 1 is characterized in that: described isolation transformation and power output circuit (2) comprise transformer TR 1, diode D 5, resistance R 10, capacitor C 7And capacitor C 8, transformer TR wherein 1Play buffer action, resistance R 10And capacitor C 7After the series connection again with diode D 5Compose in parallel rectification circuit, capacitor C 8Be filtering and power output.
3, special electric power for energy saving type LED lamp according to claim 1 is characterized in that: described Active PFC (3) is mainly an integrated circuit (IC) 1, wherein: integrated circuit (IC) 1Pin 7 pass through resistance R 8Meet field effect transistor Q 1Grid, Q 1Drain electrode meet transformer TR 1Primary coil N 1, Q 1Source electrode and IC 1Pin 4 parallel connections after resistance R 9Ground connection, IC 1Pin 5 pass through resistance R 7With diode D 1, capacitor C 5Be connected, simultaneously again with TR 1The NF winding join IC 1Pin 1 and pin 8 and pressure limiting circuit R 4, R 5Link to each other IC 1Pin 3 and input voltage sample circuit R 2, R 3, C 6Link to each other IC 1Pin 2 with receive optocoupler PC 1-2Connect IC 1Pin 6 ground connection.
4, special electric power for energy saving type LED lamp according to claim 1 is characterized in that: described voltage control and constant-current control circuit (4) are mainly by operational amplifier U 1And U 2And peripheral circuit composition, wherein U 1And U 2Output respectively through diode D 7And D 6, again through resistance R 17Optocoupler PC is penetrated in sending and receiving 1-1, U 1An input pin meet bleeder circuit R 19, R 20Be used to take out output voltage signal, U 2An input pin pass through resistance R 12Extract the sampling current of output.
5, special electric power for energy saving type LED lamp according to claim 1 is characterized in that: described electric source filter circuit (1) is by L 1, L 2, C 1, C 2And C 3Form EMI filtering link, again BR through being constituted by a diode 1Full-bridge rectification becomes pulsed dc voltage.
CN200920113799U 2009-02-12 2009-02-12 Special power supply for energy saving LED lamp Expired - Fee Related CN201374836Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200920113799U CN201374836Y (en) 2009-02-12 2009-02-12 Special power supply for energy saving LED lamp

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Application Number Priority Date Filing Date Title
CN200920113799U CN201374836Y (en) 2009-02-12 2009-02-12 Special power supply for energy saving LED lamp

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CN201374836Y true CN201374836Y (en) 2009-12-30

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101925216A (en) * 2010-07-23 2010-12-22 中山市威禾电器制造有限公司 LED street lamp
CN101969727A (en) * 2010-10-30 2011-02-09 陈金明 High power LED driving power supply
WO2011152761A1 (en) * 2010-05-31 2011-12-08 Voroshilov Igor Valerievich Led light source

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011152761A1 (en) * 2010-05-31 2011-12-08 Voroshilov Igor Valerievich Led light source
CN101925216A (en) * 2010-07-23 2010-12-22 中山市威禾电器制造有限公司 LED street lamp
CN101925216B (en) * 2010-07-23 2013-02-13 中山市威禾电器制造有限公司 LED street lamp
CN101969727A (en) * 2010-10-30 2011-02-09 陈金明 High power LED driving power supply
CN101969727B (en) * 2010-10-30 2014-06-04 陈金明 High power LED driving power supply

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CF01 Termination of patent right due to non-payment of annual fee
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Granted publication date: 20091230

Termination date: 20170212