EP1958484A1 - Dispositif de commutation et procédé de commande d'au moins une del - Google Patents

Dispositif de commutation et procédé de commande d'au moins une del

Info

Publication number
EP1958484A1
EP1958484A1 EP06830177A EP06830177A EP1958484A1 EP 1958484 A1 EP1958484 A1 EP 1958484A1 EP 06830177 A EP06830177 A EP 06830177A EP 06830177 A EP06830177 A EP 06830177A EP 1958484 A1 EP1958484 A1 EP 1958484A1
Authority
EP
European Patent Office
Prior art keywords
coupled
rectifier
inverter
led
output
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.)
Withdrawn
Application number
EP06830177A
Other languages
German (de)
English (en)
Inventor
Peter Niedermeier
Bernd Rudolph
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.)
Osram GmbH
Original Assignee
Osram GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Osram GmbH filed Critical Osram GmbH
Publication of EP1958484A1 publication Critical patent/EP1958484A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/395—Linear regulators
    • 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]
    • H05B45/39—Circuits containing inverter bridges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • 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]
    • H05B45/385—Switched mode power supply [SMPS] using flyback 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
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Definitions

  • the present invention relates to a circuit arrangement and a method for operating at least one LED (Light Emitting Diode).
  • LED Light Emitting Diode
  • LEDs are increasingly penetrating general lighting due to their advantages.
  • inexpensive operating circuits are desirable.
  • SELV Safety Extra Low Voltage
  • SELV Safety Extra Low Voltage
  • the object of the present invention is to provide a circuit arrangement and a method for operating at least one LED, which enable the implementation of several of the above-mentioned functions with the least possible circuitry complexity.
  • This object is achieved by a circuit arrangement having the features of patent claim 1 and by an operating method having the features of patent claim 10.
  • the present invention is based on the knowledge that the above object can be achieved by a circuit arrangement which comprises an inverter which is connected via a matching network with a resonance circuit which operates at least one LED, the inverter being corrected via a pump circuit with regard to the power factor and the mains current harmonics.
  • the topology of a charge pump means that the rectifier is coupled to the main energy store via an electronic pump switch. This creates a pump node between the rectifier and the electronic pump switch.
  • the pump node is coupled to the inverter output via a pump network.
  • the pump network can contain components that can also be assigned to the matching network.
  • the principle of the charge pump is that during a half period of the inverter frequency, energy is drawn from the grid voltage via the pump node and buffered in the pump network. In the subsequent half-cycle of the inverter frequency, the temporarily stored energy is fed to the main energy store via the electronic pump switch. Accordingly, energy is taken from the grid voltage in time with the inverter frequency.
  • the spectral components of the grid current which are at or above the inverter frequency can be suppressed by filter circuits.
  • the charge pump can thus be designed in such a way that the harmonics of the mains current are so low that the aforementioned regulations are observed.
  • a preferred embodiment is characterized in that it comprises a second rectifier, in particular a full-bridge rectifier, which is coupled between the matching network and the connection terminals for the at least one LED.
  • the circuit arrangement comprises further at least one coupling capacitor
  • the matching network comprises a series resonant LC circuit
  • At least one coupling capacitor in series with the inductance of the LC series resonant circuit prevents ei ⁇ nen direct current through this inductance and thus its magnetic saturation and effectiveness as a current limit of ⁇ element.
  • the voltage swing at the input of the second rectifier in relation to that at the inverter -A- lying voltage determines the quality of the correction of the mains current harmonics.
  • a transformation Preferably between the matching network and the connection terminals on ⁇ mator coupled to the at least one LED, a transformation. This makes it easy to achieve electrical isolation between the circuit arrangement and the at least one LED.
  • the primary side of the transformer is coupled to the matching network and the secondary side of the transformer with the connection ⁇ terminals for the at least one LED, wherein between the secondary side of the transformer and the terminals for the at least one LED, a second rectifier, in particular a full bridge rectifier is coupled.
  • a second rectifier in particular a full bridge rectifier is coupled.
  • a preferred development of an inventive circuit arrangement further comprises a controller, at whose controller output a control signal can be provided, wherein the controller output is such overall coupled to the inverter that the control signal frequency influences the Kirrichterfre ⁇ .
  • the controller input is preferably coupled to a device for measuring a variable which is proportional to the current through the at least one LED. This allows the LED current to be regulated to a predeterminable value in a particularly advantageous manner Consideration of the load, ie the number of LEDs used, the mains voltage and the component tolerances of the entire circuit.
  • Fig. 1 is a block diagram for an inventive
  • Circuit arrangement for operating at least one LED
  • Fig. 2 shows an embodiment of an inventive
  • FIG. 3 shows the time course of that taken from the network
  • Fig. 1 is a block diagram for a erfindungsge ⁇ Permitted circuit arrangement for operating at least one LED shown.
  • a power ⁇ can voltage from a commercial power source of Heidelbergungsan ⁇ be fed properly.
  • the mains voltage is first fed into a block FR.
  • this block contains known means for filtering interference, and on the other hand, this block contains a rectifier which rectifies the mains voltage, which is usually an AC voltage but can also be a DC voltage.
  • a full-wave rectifier in bridge circuit is usually used for this. What is important for the function of a charge pump implemented in the circuit arrangement is the property of the rectifier that it does not allow any current that would mean an energy flow from the circuit arrangement to the mains voltage source .
  • the rectified mains voltage is fed to an electronic ⁇ rule pump switch UNI, said binding site on the Verbin ⁇ FR and electronic pumping switch UNI creates a pumping node Nl between the rectifier.
  • the electronic pump switch UNI comprises a pump diode that only allows a flow of current that flows from the pump node Nl to the pump diode. It is also possible that fulfills the function of the pump diode any electronic switch such as a MOSFET switch to use for the electronic pump ⁇ UNI.
  • the current that the UNI electronic pump switch lets through feeds a main energy storage STO.
  • Most of the main energy store STO is designed as Elektrolytkon ⁇ capacitor. However, other types of capacitors are also possible. In principle, the form of energy storage that is dual to the capacitor is also possible. In the dual case, the main energy storage is STO as a coil executed. Because of the lower costs and the better efficiency, a capacitor is preferred as the main energy store STO.
  • the rectifier GR hereby guarantees that the Minim ⁇ is least made an LED current only in the direction available in this vice from the LED into light ⁇ sets can be.
  • the inductance L which may be realized by ei ⁇ NEN transformer serves to reduce the ripple of the designated at least one LED current flowing through ⁇ PN ILED- the function of the block as a pump network.
  • the block MN / PN is connected to the pump node Nl.
  • the connecting line between the pump node N1 and the block MN / PN is provided with an arrow at both ends in FIG. 1. This is to indicate that energy flows alternately from the pump node Nl to the block MN / PN and back.
  • the function of the matching network and the pump networks are combined in the block MN / PN, because embodiments of the invention are possible in which individual components can be assigned to both one and the other function.
  • ⁇ ler CONT acts on a command value to the inverter INV.
  • a parameter of the output from the inverter change size, for example the operating frequency and / or the pulse width, so verän- changed, that a change in the operating variable is counteracted ⁇ .
  • the operating variable is fed to an input of the controller CONT via the connection B1.
  • In the operating variable is a variable which drove the Be ⁇ the LED determined, for example, the current I LED through the LED.
  • FIG. 2 an exemplary embodiment of a dung OF INVENTION ⁇ circuit arrangement according to at least one LED is shown for operating.
  • a mains voltage can be connected to the connections J1 and J2.
  • L2 Via a filter consisting of two factors Kondensa ⁇ Cl, C2 and two coils Ll, L2 is the line voltage to a full-bridge rectifier consisting of diodes Dl, D2, D3, D4, respectively.
  • the full-bridge rectifier provides a node N21 with respect to a reference node NO, the rectified network ready.
  • the node N21 is also th Pumpkno ⁇ .
  • the diodes used in the rectifier Dl must nen to D4 turn fast enough Kings ⁇ to follow the inverter frequency. If this is not the case, a fast diode can be connected between the rectifier output and the pump node.
  • An electronic pump switch which is designed as a diode D5, leads from the pump node N21 to the node N22.
  • the main energy store which is designed as an electrolytic capacitor C6, is connected between N22 and NO.
  • the condensate ⁇ sator C6 supplies the inverter, which is designed here as a half bridge.
  • other converter topologies such as flyback converters or full bridges, can also be used.
  • the half-bridge shown in the embodiment in Fig. 2 includes the series connection of two Halbbrü ⁇ ckentransistoren Tl and T2, and the series circuit of two coupling capacitors C15 and C16. Both series connections are connected in parallel to C6.
  • a connection node N23 of the half-bridge transistors and a connection node N24 of the coupling capacitors C15, C16 form the alternating Rich ⁇ from ter at which a trapezoidal inverter voltage is applied to an inverter frequency.
  • An inductor L3 is connected between the node N23 and a node N25.
  • a capacitor C8 acts as Trapezkondensa ⁇ tor. Energy is supplied via a capacitor C7 to supply an integrated circuit IC1, which will be discussed in more detail below.
  • the capacitor C7 Since a trapezoidal voltage is present at the node N23 during operation of the inverter, the capacitor C7 results a current flow during these times.
  • the po sitive ⁇ half wave via diode D17 is used to power the circuit ICl, during the negative half-wave is ⁇ tet tolei- via the diode D18 to the reference potential NO.
  • the node N25 is connected via a first resonance ⁇ capacitor C9 to the pumping node N21. Between N21 and NO, a second resonant capacitor is switched C5 ge ⁇ . C9 and C5 constitute with the choke L3 a Reso ⁇ nanz Vietnamese.
  • the inductor L3 cooperates with C9 and C5 as a matching network that transforms an output impedance of Wech ⁇ selrichters in a necessary for operating the at least one LED impedance.
  • C9 and C5 By connecting C9 and C5 with the pump node N21, the combination of L3, C9 and C5 not only acts as a resonant circuit and matching network, but also as a pump network. If the potential at N21 is lower than the current mains voltage, the pump network L3, C9, C5 draws energy from the mains voltage. Exceeds the potential at N21, the voltage at the main energy store C6, so the power absorbed by the mains voltage energy to C6 submitge ⁇ is Ben.
  • the effect of the network L3, C9, C5 as a pump network can be balanced.
  • a further pumping effect comes from the capacitor C8, which is connected between N23 and N21.
  • C8 also not only acts as a pump network, but, as mentioned, fulfills the task of a trapezoidal capacitor. Trapezoidal capacitors are generally known as a measure for relieving the switch in inverters.
  • the matching network is followed by a second full-bridge rectifier, which is formed by diodes D7, D8, D9 and D10. These ensure that the LED is only supplied with current in one direction.
  • a constant current choke L2 is arranged, which ensures a reduction in the ripple of the current I LED supplied to the at least one LED.
  • the constant-current inductor L2 may be realized by a transformer, the second rectifier D7 until DLO then placed on the secondary side of the Trans ⁇ formators.
  • exemplary embodiments with two or more pump branches are conceivable, in which the pumped energy is divided into several components. For a withdrawn güns ⁇ important dimensioning of the components is possible. Also is obtained in a degree of freedom in the design of Ab ⁇ dependence of the pumped energy on operating parameters of the at least one LED.
  • the half-bridge transistors T1, T2 are designed as MOSFETs. Other electronic switches can also be used for this.
  • an integrated circuit ICl is provided in the embodiment.
  • IC1 is a circuit from the company International Rectifier of type IR2153. Alternative circuits to this type are also available on the market, for example an L6571 from STM.
  • the Circuit IR2153 includes a so-called high-side driver is the also the half-bridge transistor T ⁇ can be controlled, even though he has no connection to the Be ⁇ zugspotenzial NO. This requires a diode D6 and a capacitor C4.
  • connection 1 of the ICl is supplied with operating voltage via connection 1 of the ICl. 2, connection 1 is connected to a node N26, which is coupled to node N22 via a resistor R18.
  • the voltage at node N26 is kept at a predeterminable value by a Zener diode D12 and made available to the IC1 via a capacitor C18.
  • the component IC1 could, for example, be supplied by the rectified mains voltage via a resistor.
  • the IC1 comprises an oscillator, the oscillation frequency of which can be set via the connections 2 and 3.
  • the oscillation frequency of the oscillator ent ⁇ says the inverter frequency.
  • Circuits between the at ⁇ 2 and 3 is a frequency-determining resistor R12 connected.
  • R12 a frequency-determining resistor
  • An Bipolartran ⁇ sistors connected T3.
  • a diode D13 is connected in parallel with the emitter-collector path of T3 so that the capacitor C12 can be charged and discharged.
  • the inverter frequency can be set by means of a voltage between the basic connection of T3 and NO and thus forms a manipulated variable for a control loop.
  • T3, ICI and their wiring can thus be construed as ler Reg ⁇ .
  • the functions of the IC1 and its wiring can also be realized by any voltage or current-controlled oscillator, which controls the half-bridge transistors via driver circuits.
  • the control loop in the exemplary embodiment detects the current I LED through the LED as a control variable .
  • a quantity proportional to the current I LED is fed via capacitor C17 and diodes D14 and D15 to a low-resistance measuring resistor R7.
  • the voltage drop at R7 is therefore a measure of the current through the at least one LED.
  • Via a low-pass filter for averaging the resistor by a Wi ⁇ R8 and a capacitor C19 is formed, ge ⁇ reached the voltage drop at the input of a non-inverting in- measuring amplifier.
  • the measuring amplifier is implemented in a known manner by an operational amplifier AMP and the resistors R9, RIO and RIl.
  • a gain of Messverstär ⁇ kers of 10 is set.
  • the amplifier can be omitted or replaced by an impedance converter, such as an emitter follower.
  • Fig. 3 shows a schematic arrangement of the waveform of the line current Iline and the current I L ED by the at least one LED in a circuit arrangement according to Fig 2. in Figure 3 is still recognizable modulation of the at least one LED by current I LED flowing.. - Before ⁇ there is a 100 Hz modulation, which is superimposed by a high-frequency signal - can be further reduced by optimizing the above-mentioned control, while the RF ripple can be reduced by increasing the constant current choke L2.

Landscapes

  • Dc-Dc Converters (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Rectifiers (AREA)

Abstract

La présente invention concerne un dispositif de commutation et un procédé de commande d’au moins une DEL, comportant : un premier et un deuxième branchements au secteur (J) pour un branchement à la tension de secteur ; un premier redresseur (FR) dont l’entrée de redressement est couplée aux branchements secteur (J) et à la sortie de redressement duquel la tension de secteur redressée est disponible ; un circuit de pompage électronique (UNI) qui est couplé à la sortie de redressement, un nœud d’entraînement de pompe (N1) étant défini ; un accumulateur d'énergie principal (STO) qui est couplé avec le côté opposé à la sortie de redressement du circuit de pompage électronique (UNI) ; un onduleur (INV) qui est couplé avec l'accumulateur d'énergie principal (STO) pour l'alimentation en énergie provenant de ce dernier, l'onduleur (INV) étant conçu de façon à établir à sa sortie ondulée une tension ondulée qui présente une fréquence d’ondulation ; un réseau de pompage (PN) au moyen duquel la sortie ondulée est couplée au nœud d'entraînement de pompe (N1) ; un réseau d'adaptation (MN) au moyen duquel la sortie ondulée est couplée avec les broches de connexion (J) pour ladite DEL, le réseau d'adaptation (MN) comportant un circuit de résonance avec une fréquence propre. Elle concerne en outre un procédé de commande correspondant pour la commande d’au moins une DEL.
EP06830177A 2005-12-07 2006-11-29 Dispositif de commutation et procédé de commande d'au moins une del Withdrawn EP1958484A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005058484A DE102005058484A1 (de) 2005-12-07 2005-12-07 Schaltungsanordnung und Verfahren zum Betreiben mindestens einer LED
PCT/EP2006/069028 WO2007065815A1 (fr) 2005-12-07 2006-11-29 Dispositif de commutation et procédé de commande d'au moins une del

Publications (1)

Publication Number Publication Date
EP1958484A1 true EP1958484A1 (fr) 2008-08-20

Family

ID=37847216

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06830177A Withdrawn EP1958484A1 (fr) 2005-12-07 2006-11-29 Dispositif de commutation et procédé de commande d'au moins une del

Country Status (9)

Country Link
US (1) US20090251065A1 (fr)
EP (1) EP1958484A1 (fr)
JP (1) JP2009518835A (fr)
KR (1) KR101430572B1 (fr)
CN (1) CN101326859B (fr)
CA (1) CA2630901A1 (fr)
DE (1) DE102005058484A1 (fr)
TW (1) TW200740297A (fr)
WO (1) WO2007065815A1 (fr)

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DE102009003852B4 (de) 2009-04-30 2013-05-16 Lear Corporation Gmbh Gleichspannungswandler
DE102009025752B4 (de) 2009-05-06 2011-06-16 Lear Corp. Verfahren und Schaltungsanordnung zur Ansteuerung einer Last
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DE102009042419B4 (de) * 2009-09-21 2011-12-15 Osram Gesellschaft mit beschränkter Haftung Schaltungsanordnung zum Betreiben mindestens einer LED
DE102009042433B4 (de) * 2009-09-22 2011-09-15 Osram Gesellschaft mit beschränkter Haftung Schaltungsanordnung zum Betreiben mindestens einer LED
CN101720153B (zh) * 2009-12-01 2014-05-07 海洋王照明科技股份有限公司 一种应用于机场下滑灯的led调光控制***
DE102009047632B4 (de) * 2009-12-08 2013-02-21 Osram Ag Schaltungsanordnung zum Betreiben mindestens einer LED
DE102010015908B4 (de) 2010-03-10 2013-10-24 Lear Corporation Gmbh Vorrichtung zur Ansteuerung einer elektrischen Last
DE102010015904B4 (de) 2010-03-10 2016-12-15 Lear Corporation Gmbh Verfahren zur Ansteuerung einer elektrischen Last
EP2597935A4 (fr) * 2010-07-22 2015-09-02 Panasonic Ip Man Co Ltd Circuit d'éclairage
RU2588580C2 (ru) * 2011-06-17 2016-07-10 Конинклейке Филипс Н.В. Драйверное устройство постоянного тока, имеющее входной и выходной фильтры, для приведения в действие нагрузки, в частности, блока светодиодов
DE102013201438A1 (de) * 2013-01-29 2014-07-31 Osram Gmbh Schaltungsanordnung und Verfahren zum Betreiben und Dimmen mindestens einer LED
DE102014100973B4 (de) 2014-01-28 2017-08-17 Lear Corporation Gmbh Verfahren zum Steuern von lichtemittierenden Dioden
CN106664770B (zh) 2014-03-24 2019-11-29 雷迪半导体有限公司 电源转换器电路及其转换交流电源的方法
DE102014114954A1 (de) * 2014-10-15 2016-04-21 Beckhoff Automation Gmbh Halbbrücke mit zwei Halbleiterschaltern zum Betreiben einer Last
CN110495253B (zh) 2017-01-26 2022-01-07 红色半导体公司 电源转换器电路
CN113872432A (zh) * 2021-11-17 2021-12-31 四川莱福德科技有限公司 一种功率因数校正变换器及控制方法

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Also Published As

Publication number Publication date
US20090251065A1 (en) 2009-10-08
CN101326859B (zh) 2011-07-13
TW200740297A (en) 2007-10-16
DE102005058484A1 (de) 2007-06-14
KR101430572B1 (ko) 2014-08-14
JP2009518835A (ja) 2009-05-07
WO2007065815A1 (fr) 2007-06-14
CA2630901A1 (fr) 2007-06-14
CN101326859A (zh) 2008-12-17
KR20080080359A (ko) 2008-09-03

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