WO2010134721A2 - Circuit de correction de facteur de puissance de del multicouche - Google Patents

Circuit de correction de facteur de puissance de del multicouche Download PDF

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Publication number
WO2010134721A2
WO2010134721A2 PCT/KR2010/003054 KR2010003054W WO2010134721A2 WO 2010134721 A2 WO2010134721 A2 WO 2010134721A2 KR 2010003054 W KR2010003054 W KR 2010003054W WO 2010134721 A2 WO2010134721 A2 WO 2010134721A2
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WO
WIPO (PCT)
Prior art keywords
power
power factor
factor correction
led
circuit
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.)
Ceased
Application number
PCT/KR2010/003054
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English (en)
Korean (ko)
Other versions
WO2010134721A9 (fr
WO2010134721A3 (fr
Inventor
홍석우
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ACROSENTEC Co Ltd
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ACROSENTEC Co Ltd
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Filing date
Publication date
Application filed by ACROSENTEC Co Ltd filed Critical ACROSENTEC Co Ltd
Publication of WO2010134721A2 publication Critical patent/WO2010134721A2/fr
Publication of WO2010134721A3 publication Critical patent/WO2010134721A3/fr
Publication of WO2010134721A9 publication Critical patent/WO2010134721A9/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4266—Arrangements for improving power factor of AC input using passive elements
    • 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
    • H05B45/355—Power factor correction [PFC]; Reactive power compensation
    • 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
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • 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
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/375—Switched mode power supply [SMPS] using buck topology
    • 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
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Definitions

  • the present invention relates to a power factor correction circuit, and more particularly, to a PFC circuit that compensates for power factor when a light emitting diode (LED) is driven, in which two or more PFC circuits including a capacitor and a diode are configured in parallel. And a noise filter between the PFCs to block conductive noise between individual PFCs, thereby ensuring a high power factor even at a low power level.
  • a light emitting diode LED
  • LED lighting products connected directly to an AC power source must have a circuit built in a limited space. Therefore, a method using a step-down buck converter type IC capable of high voltage connection is possible. Most common. This method is actually widely used all over the world, and is configured as shown in FIG.
  • FIG. 1 is a circuit diagram showing a conventional AC power LED lighting circuit.
  • the conventional AC power type LED lighting circuit 100 includes a noise filter 110, a rectifier circuit 120, a smoothing circuit 130, and an LED / converter circuit 140. .
  • the conventional AC power LED lighting circuit 100 configured as described above blocks the noise at the input terminal and the inside by the noise filter 110, and converts the AC input into the pulsating DC current by the rectifier circuit 120. Then, the pulsating DC current is smoothed to the current used in the LED / converter circuit 140 by the smoothing circuit 130 and supplied to the LEDs arranged in series or in parallel by the LED / converter circuit 140 so that the LED bulb is Light emission.
  • a large capacity capacitor is usually used in the rectifier circuit 120. In this process, a power factor decrease due to a phase difference between voltage and current occurs. In general, the power factor is 50 to 60% when the capacitor is smoothed. Since the power factor is low, spike current often occurs, and a lot of harmonic components are generated, which lowers the stability of the product, and the application of the power factor is very limited.
  • the power factor drop problem is composed of a power factor correction circuit (hereinafter referred to as PFC) by combining two capacitors in series with the smoothing circuit 130 and combining diodes as shown in FIG. It can be improved.
  • PFC power factor correction circuit
  • the conductive noise (NOISE) problem blocks the noise by configuring a filter circuit combining a line filter and a capacitor at the output terminal as shown in (c) of FIG.
  • the component of the filter circuit at the output stage must be strengthened.
  • the reactance component of the coil-X capacitor of the filter is increased to further decrease the power factor.
  • the standard has a problem of falling to the level of 70% of power factor and 50% at the level of 5 watts (W).
  • the power factor and the conductive EMC noise have the characteristics of deteriorating the opposite side when one side is improved, so it is virtually impossible to solve both of them.
  • An object of the present invention for solving the above problems is to provide two or more PFCs composed of two capacitors and a circuit such as a diode in parallel to a PFC circuit that compensates for power factor when driving a light emitting diode (LED).
  • a multi-layered LED power factor correction circuit can be ensured even at a low power level.
  • the power supply unit for supplying AC (AC) power;
  • a filtering unit filtering the input terminal to which the AC power is applied and noise inside;
  • a rectifier for converting an input of the AC power source into a pulsating DC power source;
  • a multilayer compensation unit for smoothing the pulsating direct current (DC) power supply by two or more power factor correction circuits (PFCs) and attenuating conductive noises;
  • PFCs power factor correction circuits
  • an LED driver for converting the smoothed pulsating direct current (DC) power into a low voltage according to a switching operation and transferring the smoothed pulsating direct current (DC) power to the LED array to emit the LED array.
  • each power factor correction circuit includes a plurality of capacitors and two or more diodes, a noise filter for attenuating the conductive noise between the power factor correction circuit is connected.
  • a first capacitor C1, a first diode D1, and a second capacitor C2 are connected in series, and the first capacitor C1 and the first diode D1 are connected in series.
  • the second diode D2 is connected in parallel to the direction of the first diode D1 so as to include the connection of the first diode D1, and the first diode D1 and the second capacitor C2 include the connection of the first diode D1 and the second capacitor C2.
  • the third diode D3 is connected in parallel.
  • the two or more power factor correction circuits are connected in parallel, a noise filter is connected between the power factor correction circuits to which the pulsating direct current (DC) power is applied, and the power factor correction circuits to which the pulsating direct current (DC) power is output differs.
  • the noise filter is connected.
  • the LED driving unit may include: a switching element configured to perform a switching operation so that the pulsating direct current (DC) power is applied or cut off to the LED array; A control IC controlling the switching operation; An inductor for storing power by on / off operation of the control IC and supplying the power to the LED array; It includes a current sensing resistor for controlling the current flowing in the LED array.
  • a switching element configured to perform a switching operation so that the pulsating direct current (DC) power is applied or cut off to the LED array
  • a control IC controlling the switching operation
  • An inductor for storing power by on / off operation of the control IC and supplying the power to the LED array
  • It includes a current sensing resistor for controlling the current flowing in the LED array.
  • the current sensing resistor is connected between the control IC and the switch element, and the control IC is used to measure the voltage of the current sensing terminal of the control IC to control the current on the LED array side.
  • the power factor of an LED lighting circuit operating at a low power capacity of 5 watts (W) can be maintained at a level of 90%.
  • the conventional circuit requires a power factor correction circuit and an input noise filter, so that the circuit volume must be greatly increased.
  • the volume of the input noise filter can be greatly reduced, and a small filter component can be configured between the multilayer PFCs.
  • a miniaturized circuit can be implemented.
  • FIG. 1 is a circuit diagram showing a conventional AC power LED lighting circuit.
  • FIG. 2 is a diagram illustrating a multilayer LED power factor correction circuit according to an exemplary embodiment of the present invention.
  • 3 to 5 are diagrams showing a power factor graph by a general LED lighting circuit.
  • 6 and 7 are diagrams showing a power factor graph by the multilayer LED power factor correction circuit according to the present invention.
  • LED / converter circuit 200 multilayer LED power factor correction circuit
  • power supply unit 220 filtration unit
  • rectifying unit 240 multilayer compensation unit
  • driver 251 control IC
  • LED array 252 LED array 253: Inductor
  • flywheel diode 255 switching element
  • FIG. 2 is a diagram illustrating a multilayer LED power factor correction circuit according to an exemplary embodiment of the present invention.
  • the multilayer LED power factor correction circuit 200 includes a power supply unit 210, a noise filtering unit 220, a rectifier unit 230, and a multilayer compensation unit 240. ) And an LED driver 250.
  • the power supply unit 210 supplies AC power.
  • the filter unit 220 filters an input terminal to which an AC power is applied and noise inside.
  • the filtration unit 220 is usually composed of X-capacitor, choke coil and the like. Lighting products used in the form of socket-mounts generally do not have a ground terminal, so no Y capacitor is used to connect to ground.
  • the rectifier 230 is a circuit for converting an input of an AC power source into a pulsating direct current (DC) power source, and a bridge circuit in which diodes are arranged symmetrically is widely used.
  • DC direct current
  • the multilayer compensation unit 240 is a circuit for smoothing the pulsating direct current (DC) power supply by two or more power factor correction circuits (PFCs) and attenuating conductive noise.
  • the multilayer compensation unit 240 is a smoothing function, and since the pulsating direct current changes from 0 to 1.4 times the voltage of the AC voltage at regular intervals, it is a circuit for smoothing it for use in an LED circuit driven by DC. Use a smoothing condenser.
  • the multilayer compensator 240 includes a noise filter for each of the power factor correction circuits 242 and 244 including a plurality of capacitors and two or more diodes to attenuate conductive noise between the power factor correction circuits 242 and 244. 246, 248 are connected.
  • each of the power factor correction circuits 242 and 244 is connected to the first capacitor C1, the first diode D1, and the second capacitor C2 in series, and the first capacitor C1 and the first diode (
  • the second diode D2 is connected in parallel in a direction opposite to the direction of the first diode D1 to include the connection of D1), and includes a connection of the first diode D1 and the second capacitor C2.
  • the third diode D3 is connected in parallel in a direction opposite to that of the first diode D1.
  • the multilayer compensation unit 240 includes two or more power factor correction circuits 242 and 244 connected in parallel, and a noise filter 246 between the power factor correction circuits 242 and 244 to which pulsating direct current (DC) power is applied.
  • Another noise filter 248 is connected between the power factor correction circuits 242 and 244 to which the pulsating direct current (DC) power is output.
  • noise generated by the LED driver 250 is first blocked by the noise filter, thereby reducing the amount of conductive noise going to the input terminal, thereby greatly reducing the load on the filter unit 220, and reducing the noise filter connected between individual PFCs. 246 and 248 have a low imaginary component of reactance and have little effect on the power factor.
  • the LED driver 250 converts the smoothed pulsating direct current (DC) power into a low voltage according to a switching operation and transmits the converted voltage to the LED array 252 to emit the LED array.
  • DC direct current
  • the LED driver 250 may include a control IC 251, an LED array 252, an inductor 253, a flywheel diode 254, and a switching FET. 255 and Current Sensing Resister 256.
  • the LED array 252 places the LEDs in series or in parallel in appropriate quantities depending on the capacity of the lighting product.
  • the switching element 255 performs a switching operation such that a pulsating direct current (DC) power is applied or cut off to the LED array 252.
  • DC direct current
  • the switching element 255 may be implemented by, for example, a field effect transistor (FET), and is responsible for a power switching operation of turning on / off power by receiving a switching signal of the control IC 251, and some products may control the control IC 251. You can also implement types that are integrated with.
  • FET field effect transistor
  • the control IC 251 controls the switching operation of the switching element 255.
  • the control IC 251 uses the pulsating DC output of the multilayer compensation unit 240 as an input, and has a low voltage to be applied to the LED array 252 through the switching operation.
  • the inductor 253 stores power by the on / off operation of the control IC 251 and supplies the power to the LED array 252.
  • the flywheel diode 254 functions to cancel the reflux current of the inductor 253.
  • the current sense resistor 256 is used to measure the current flowing in the LED array 252. At this time, the current sense resistor 256 is connected between the control IC 251 and the switching element 255, the control IC 251 measures the voltage of the current sensing terminal of the control IC to the current of the LED array 252 side It is used to control. That is, the current sense resistor 256 is normally connected to the source terminal of the FET and the current sensing terminal of the control IC 251. In general, the current of the LED is controlled by measuring the voltage of the terminal.
  • AC power is applied from the power supply unit 210 to the rectifying unit 230 while noise is filtered through the filtering unit 220, and the rectifying unit 230 is applied. Is converted to the pulsating direct current of the DC power supply.
  • the pulsating direct current is smoothed through the multilayer compensation unit 240, and the conductive EMC noise is blocked by the noise filters 246 and 248 to be transmitted to the LED driver 250.
  • the LED driver 250 applies a pulsating direct current applied from the multilayer compensation unit 240 to the LED array 252 to emit a plurality of LEDs.
  • the control IC 251 controls the switching operation of the switching element 255 to adjust a plurality of LED light emitting state, by measuring the current on the LED side through the current sense resistor 256.
  • 3 to 5 are diagrams illustrating a power factor graph by a general LED lighting circuit.
  • the power factor is about 70% when only the noise filter is applied to the general LED lighting circuit without applying the power factor correction circuit (PFC).
  • a power factor correction circuit (PFC) is applied to a conventional LED lighting circuit and a noise filter is also applied, and the power factor is about 70% when the power of the power is 7 Watt (W).
  • FIGS. 6 and 7 are graphs illustrating power factor graphs of the multilayer LED power factor correction circuit according to the present invention.
  • the power factor correction circuit PFC is applied to two layers, and a noise filter is applied between the power factor correction circuits PFC. It can be seen that the power factor is 92% at the (W) level. Therefore, it can be seen that the multilayer LED power factor correction circuit 200 according to the present invention is improved by 22% compared to the 70% power factor of the existing 7 Watt (W) class LED lighting circuit.
  • Multi-layer LED power factor correction circuit 200 comprises a power factor correction circuit (PFC) in two stages, by connecting a noise filter between the two power factor correction circuit (PFC), the power source power is 7 Watt (W) class
  • PFC power factor correction circuit
  • W 7 Watt
  • the power factor correction circuit PFC is applied to two multilayers, and a noise filter is applied between the power factor correction circuits PFC. It can be seen that the power factor is about 91% at the (W) level. Therefore, it can be seen that the multilayer LED power factor correction circuit 200 according to the present invention has a 41% improvement over the 50% power factor in the case of the existing 5 Watt (W) class LED lighting circuit.
  • the multilayer LED power factor correction circuit 200 comprises a power factor correction circuit (PFC) in two stages, and connects a noise filter between two power factor correction circuits (PFC), so that the power supply is 5 Watts (W). Even at low power capacity, the power factor was maintained at 0.9 level and EMC conducted noise was also satisfied.
  • PFC power factor correction circuit
  • a PFC circuit that compensates for power factor when driving a light emitting diode includes two or more PFCs composed of two capacitors and a circuit such as a diode in parallel, By connecting a noise filter between the PFCs to conduct conductive noise blocking between individual PFCs, a multi-layered LED power factor correction circuit can be realized to ensure high power factor even at a low power level.
  • the present invention is applicable to LED lighting products using AC power.
  • conductive power may be blocked and a high power factor may be applied to a power supply that converts an AC voltage into a DC for driving a LED.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Rectifiers (AREA)

Abstract

La présente invention concerne un circuit de correction de facteur de puissance (PFC) multicouche, dans lequel au moins deux circuits de PFC servant à corriger un facteur de puissance pendant le fonctionnement de diodes électroluminescentes (DEL) sont constitués par des condensateurs, diodes etc., et montés en parallèle, le bruit de conduction entre les circuits de PFC individuels étant filtré au moyen d'un filtre de bruit de façon à assurer un facteur de puissance élevé même à un faible niveau de capacité de puissance. Le circuit de correction de facteur de puissance de DEL multicouche selon la présente invention comprend : une unité d'alimentation servant à fournir un courant alternatif (CA), une unité filtre servant à filtrer d'une part le bruit d'une borne d'entrée, au niveau de laquelle est appliqué le courant alternatif, et d'autre part le bruit de l'intérieur du circuit; une unité faisant office de redresseur, servant à convertir le courant CA entré en un courant continu (CC) pulsé; une unité de correction multicouche servant à lisser le courant CC pulsé au moyen d'au moins deux circuits de PFC et à réduire les bruits de conduction; et une unité de commande de DEL servant à convertir le courant CC pulsé lissé en une faible tension en fonction d'une opération de commutation, et à transmettre cette faible tension à une barrette de DEL pour permettre à cette dernière d'émettre de la lumière. La présente invention maintient le facteur de puissance d'un circuit d'une lampe à DEL qui fonctionne à une faible capacité de puissance 5 Watt (W), à un niveau de 90%. On peut également produire un circuit de lampe à DEL, qui maintient un facteur de puissance de 92% à une puissance de 5 à 8 Watt (W). On peut en outre produire un circuit de lampe à DEL, dans lequel le bruit de conduction EMC satisfait à une valeur de référence même à une faible capacité de puissance.
PCT/KR2010/003054 2009-05-21 2010-05-14 Circuit de correction de facteur de puissance de del multicouche Ceased WO2010134721A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2009-0044405 2009-05-21
KR1020090044405A KR100982537B1 (ko) 2009-05-21 2009-05-21 복층 ｌｅｄ 역률 보상 회로

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WO2010134721A2 true WO2010134721A2 (fr) 2010-11-25
WO2010134721A3 WO2010134721A3 (fr) 2011-01-27
WO2010134721A9 WO2010134721A9 (fr) 2011-03-17

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102665362A (zh) * 2012-05-28 2012-09-12 济南九恒实业有限公司 保护接地型人体红外感应led智能灯
WO2014174159A1 (fr) 2013-04-24 2014-10-30 Societe D'etudes Et D'economies En Eclairage, Se3 Dispositif d'alimentation en courant continu d'un ensemble de dispositifs d'éclairage à leds utilisés dans l'éclairage industriel et l'éclairage tertiaire

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Publication number Priority date Publication date Assignee Title
KR101635798B1 (ko) * 2012-08-29 2016-07-04 한국과학기술원 병렬형 엘. 이. 디. 조명장치
WO2015016592A1 (fr) * 2013-08-02 2015-02-05 주식회사 르코어테크놀러지 Circuit intégré d'excitation de led et procédé d'excitation pour celui-ci
KR101738147B1 (ko) * 2015-04-24 2017-05-22 엘이디엔진주식회사 엘이디 광모듈의 자동전압조절 구동장치
KR101796431B1 (ko) * 2015-09-08 2017-11-09 유수근 역률 보상형 led 구동장치 및 구동방법
KR101880544B1 (ko) * 2017-01-09 2018-07-23 주식회사 인터엠 맥동 전압 보상을 위한 파워앰프용 전원 공급 장치 및 그 제어 방법

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Publication number Priority date Publication date Assignee Title
KR910003786B1 (ko) * 1988-05-13 1991-06-12 오병훈 교류/직류콘버터의 역률개선회로
JPH09285125A (ja) * 1996-04-12 1997-10-31 Ricoh Co Ltd Ｏａ機器用電源装置
JPH10271826A (ja) * 1997-03-21 1998-10-09 Shindengen Electric Mfg Co Ltd スイッチング電源
KR100319524B1 (ko) 1999-12-27 2002-01-09 이형도 패시브 고역률 보상회로

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102665362A (zh) * 2012-05-28 2012-09-12 济南九恒实业有限公司 保护接地型人体红外感应led智能灯
CN102665362B (zh) * 2012-05-28 2014-04-09 济南九恒实业有限公司 保护接地型人体红外感应led智能灯
WO2014174159A1 (fr) 2013-04-24 2014-10-30 Societe D'etudes Et D'economies En Eclairage, Se3 Dispositif d'alimentation en courant continu d'un ensemble de dispositifs d'éclairage à leds utilisés dans l'éclairage industriel et l'éclairage tertiaire

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KR100982537B1 (ko) 2010-09-15
WO2010134721A9 (fr) 2011-03-17
WO2010134721A3 (fr) 2011-01-27

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