EP2596686B1 - Dimmable led lamp - Google Patents
Dimmable led lamp Download PDFInfo
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- EP2596686B1 EP2596686B1 EP11741420.1A EP11741420A EP2596686B1 EP 2596686 B1 EP2596686 B1 EP 2596686B1 EP 11741420 A EP11741420 A EP 11741420A EP 2596686 B1 EP2596686 B1 EP 2596686B1
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- led
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/385—Switched mode power supply [SMPS] using flyback topology
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/39—Circuits containing inverter bridges
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/355—Power factor correction [PFC]; Reactive power compensation
Definitions
- the invention relates to a method for dimming LED lamps such as LEDs and / or OLEDs, in particular by means of operating devices for lamps.
- the invention relates to so-called 'retrofit' LED lamps, which are designed to replace conventional light bulbs or halogen lamps, and which have the corresponding mechanical and electrical connections.
- the Power Integrations datasheet entitled "Low Cost Dimmable LED Ballast Using the Valley Fill Current Shaping Circuit” refers to a dimmable LED ballast.
- LEDs and / or OLEDs for lighting is increasingly required due to their positive characteristics, which are above all their energy efficiency and longevity.
- retrofit LED lamps is advantageous in the existing electrical installations, such as light bulb sockets, wiring and switches can be used.
- the replacement of the original lamps with retrofit LED lamps is becoming increasingly common. They are available from different manufacturers, mostly based on a bulb size for E14 or E27 sockets.
- Retrofit LED lamps need in addition to the one or more LED or OLED chips additionally control electronics and cooling elements.
- the invention is therefore an object of the invention to provide a method for dimming operating devices for lighting, in particular converter for at least one LED and / or OLED and an operating device designed for this purpose, in which a dimming over a phase control in a more advantageous manner is feasible.
- the invention thus relates to a method for dimming lamps operated by means of an operating device.
- the operating device is in particular a converter for at least one LED and / or OLED.
- the method has the following steps: A phase control of a power supply of the operating device is performed.
- the power supply with phase control is first supplied to a rectifier GR and applied to an energy storage ES after rectification.
- the energy store ES is, in particular, a passive-valley-fill circuit PVF (passive power factor correction circuit) of the operating device.
- the fluctuation and / or level of the output voltage of the energy store ES caused by the phase gating is evaluated.
- a parameter determining the light output of the luminous means is provided for the operation of a preferably downstream operating circuit.
- the output voltage of the energy store ES is continued, preferably via the operating circuit, for the power supply of the lighting means.
- the energy store is an energy store of a power factor correction circuit.
- the power-determining parameter may be the timing of a switch, in particular the adjustment of the duty cycle and / or the frequency.
- the operating circuit preferably has a flyback converter FBC, a half-bridge-based resonant converter and / or a PWM circuit.
- Dimming is preferably carried out via amplitude dimming and / or pulse width modulation (PWM).
- PWM pulse width modulation
- the output voltage of the energy storage can be supplied to the operating circuit.
- the energy store ES may comprise a storage capacitor, a single-stage or multi-stage passive valley fill circuit PVF and / or a charge pump circuit.
- circuits other than energy storage ES such as boost converter and the like may be used.
- the current is preferably measured by the at least one LED and / or OLED.
- the evaluation of the output voltage of the energy storage ES can be done directly and / or indirectly. This means that the evaluation of the output voltage of the energy store can be measured at the output of the energy store and / or at the output of the operating circuit.
- a Dimmvorgabe which is preferably set via a dimmer switch by the user, preferably via the phase control is adjustable.
- the invention further relates to an operating device for operating lamps, in particular of at least one LED and / or OLED.
- the operation is carried out by a voltage controlled by Phasenanroughsimmer dimmer, preferably an AC voltage.
- the operating device has at least one rectifier GR and an energy store ES, in particular a passive valley fill circuit PVF, preferably for rectifying and smoothing the AC voltage.
- the operating device comprises an operating circuit, preferably downstream of the energy store ES, for operating the lighting means with a dimming value defined by a parameter.
- the operating device also has a control circuit STS for evaluating the output voltage of the energy store ES.
- the control circuit STS for determining the parameter of Operation of the operating circuit designed. The determination of the parameter takes place as a function of the output voltage of the energy store ES and / or the operating circuit.
- the energy store is an energy store of a power factor correction circuit.
- the operating circuit preferably has a flyback converter FBC, a half-bridge-based resonant converter and / or a PWM circuit.
- the energy store ES preferably comprises a storage capacitor, a single-stage or multi-stage passive valley fill circuit PVF and / or a charge pump.
- the operating device is further preferably designed to carry out the above-mentioned method.
- the invention relates to an LED lamp, in particular a retrofit LED lamp.
- This has a lighting means, in particular at least one LED and / or OLED.
- the LED lamp has an operating device for lighting means, as has been described above.
- the invention still treats a dimmable LED lighting system. This has at least one LED lamp as shown above. In addition, it still has a phase angle or phase dimmer.
- FIG. 1 schematically a dimmable LED lighting system according to the invention is shown.
- An alternating mains voltage for example an AC voltage with 220V
- a phase-gating circuit for example a triac.
- the triac is connected to a user interface U / I, which may be, for example, a rotatable dimmer switch or a dimmable pushbutton switch.
- a user can now use the user interface (switch, push button, slide, ...) to set the phase angle of the mains voltage with the help of the triac.
- the correspondingly cut AC voltage is first fed to a rectifier GR, which rectifies the alternating cut AC voltage, and then a subsequent so-called 'passive valley fill' circuit (or also known as 'passive fill valley' circuit) applied PVF, which is an example of an energy storage ES.
- a rectifier GR which rectifies the alternating cut AC voltage
- a subsequent so-called 'passive valley fill' circuit or also known as 'passive fill valley' circuit
- PVF an energy storage ES.
- the flyback converter FBC used as operating circuit in this example controls the secondary-side DC voltage, acting as a DC / DC converter, according to an operating parameter set on it and supplies one or more LEDs and / or OLEDs with this set DC voltage.
- a control circuit STS defines the operating parameter for the operating circuit. The determination of the operating parameter takes place on the basis of the output voltage of the energy store ES and / or the operating circuit. In addition, the LED current can be measured as a further reference.
- the central point of the invention is that the phase-angle signal, that is, the correspondingly modulated mains voltage, which corresponds to the setpoint specified by the user, is supplied after rectification by a rectifier GR to a passive-valley-fill circuit PVF.
- the output voltage of the passive valley fill circuit PVF represents the phase angle. Therefore, therefore, indirectly, ie, for example, at the output of the operating circuit, or directly at the output of the passive-valley-fill circuit PVF, the output voltage can be measured to from the user close by means of phase angle desired dimming value.
- the output voltage is converted by means of the control circuit STS into a kind of dimming value specification, so that the dimming value specification in the control circuit STS is then converted into a power-determining parameter in the LED.
- the output voltage of the passive-valley-fill circuit PVF is a type of bus voltage.
- the advantage of the dimmable lighting system shown or of the corresponding method is that the type of dimmable operating circuit for an LED track has a space requirement which does not exceed the small size of an E14 candle lamp, for example.
- the passive valley fill circuit PVF is in FIG. 1 an electrical energy store ES, which for example has some form of capacitor circuit. Accordingly, other forms of electrical energy storage circuits are conceivable instead of the passive valley fill circuit PVF. This is in particular an upstream rectifier bridge with downstream storage capacitor to think. Also possible is the use of a multi-level Passive Valley Fill circuit PVF. In addition, a single or multi-stage charge pump circuit (charge pump, see Fig. 4 or an actively controlled power factor correction circuit such as boost converter). Finally, it is also conceivable that a combination of said circuits, in particular a combination of charge pump and passive valley fill circuit PVF be used.
- an amplitude dimming of the LED is preferably carried out, in particular by means of a so-called flyback converter FBC.
- the amplitude is adjusted according to the invention by adjusting the sampling rate of the switch of the flyback converter FBC according to the dimming setpoint provided by the control circuit STS.
- a review, d. H. A referencing whether the said dimming setpoint has also been correctly implemented, can be carried out via a measurement of the LED current as an actual value.
- a pulse width modulation for dimming the LED is performed.
- FIG. 2 shows a modification of the lighting system Fig.1 ,
- the operating circuit FBC is yet another Connected downstream circuit unit, which can flow starting from the supplied DC voltage, a defined current through the LED track.
- the latter is, for example, a PWM circuit.
- An adaptation of the actual dimming value to the detected setpoint specification is thus now feasible by adjusting the sampling rate of the PWM circuit.
- a combined adaptation by means of the operating circuit (amplitude dimming) and the PWM circuit is conceivable.
- a dimming via a PWM modulation of the LED, typically in the range from 100 Hz to 1 kHz. It is also conceivable that the PWM modulation takes place in that the LED is now switched on for a variable period of time in the 100 hertz grid.
- PWM modulation has the potential drawback that visual effects such as flicker, etc. may occur, and therefore those intervals in which all the LEDs are turned off should not be too large; H. also the frequency or the PWM dimming rate should not be too low.
- FIG. 3 shows a schematic representation of the circuit construction of the operating device in a first embodiment.
- the phase control ie the triac off FIG. 1 not necessarily part of the operations control. This is particularly advantageous if it is intended to continue to be used in an already existing electrical installation comprising dimming switches with phase control, wiring and lampholder, and only a retrofit LED lamp according to the invention comprising the operating device according to the invention and the corresponding luminous means are to be used.
- the operating device thus has reference to FIG. 1 essentially the rectifier GR, the energy storage ES or harmonic filter PVF (passive valley fill circuit), an operating circuit FBC (flyback converter) and a control circuit STS, an integrated circuit such as an ASIC or a microcontroller.
- the embodiment is thus based on a combination of the previously discussed active power factor correction via a charge pump or a flyback converter FBC with a passive power factor correction circuit based on the principle of the so-called "passive valley fill” (PVF).
- This PVF circuit is a cost-effective way, which is also provided to increase the power factor (for example, to values of more than 95%) and whose general principle is now to be explained.
- two charging capacitors C11 and C12 of a harmonic filter PVF are serially charged in the region of the mains voltage maximum via the series connection of the rectifier diode D12 and the series resistor R in the bridge branch of the harmonic filter PVF, assuming in that the capacitances of the capacitors C11 and C12 have the same value - in each case half the peak value of the input mains voltage minus the threshold voltages of the two rectifier diodes of a mains rectifier AC / DC (in FIG Fig. 4 not shown) as well as the threshold voltage of diode D12.
- the bridge resistance R ensures a limitation of interference peaks of the charging current IBr flowing in the bridge branch of the harmonic filter PVF during the charging phase of the two charging capacitors C11 and C12.
- the two charging capacitors C11 and C12 are discharged in parallel via the rectifier diodes D11 and D13, thereby supplying a load-dependent output current Ira until the rectified voltage at the output port of the mains rectifier AC / DC during the next charging phase of the capacitors C11 and C12 has risen again to half the peak value ⁇ mains of the input mains voltage U network .
- the duration of the discharge phase of the two capacitors C11 and C12 may be approximately 37% of the duration of a complete charge / discharge cycle, followed by an idle phase.
- the size and duration of the onset of the charging current I Br is a function of the total charge Qges released during the discharge phase by the capacitors C11 and C12 and the magnitude of the bridge resistance R in the charging circuit.
- An upstream LC low-pass filter TPF in the input circuit (in Figure 4 not shown), consisting of a grid-parallel filter capacitor and a choke coil, is used for filtering high-frequency components of the mains current. In addition, it causes a smoothing of the input current I network .
- an operating circuit preferably comprising a flyback converter FBC, connected.
- This is controlled by a control circuit STS, which measures and evaluates the output voltage of the operating circuit and / or the energy store ES as a dimming setpoint specification in the manner described above.
- an LED track can be connected, wherein still a controllable PWM circuit can be connected in between.
- the load circuit may have further circuit elements, as is well known from the prior art.
- Fig. 4 shows a second embodiment of the operating device according to the invention, in which a PFC circuit (Power Factor Correction), in this case a charge pump circuit, is used as the energy store ES.
- the active PFC circuit preferably has a rectifier full bridge or multipath rectifier realized AC rectifier AC / DC (in Figure 4 not shown) for rectifying the AC voltage supplied from a power supply network to provide a rectified first input voltage UE, and a harmonic filter powered by said UE, consisting of a series connection of two forward rectifying diodes 14, 11 arranged forwardly of the pulsating direct current supplied by the mains rectifier AC / DC connected to the center tap between these two diodes, acting as a charge pump pump capacitor 12.
- a PFC circuit Power Factor Correction
- the rectifier diode 14 of the harmonic filter can simultaneously be part of the power rectifier AC / DC.
- the charge pump is magnetically coupled to a flyback converter FBC via a transformer 1.
- This FBC has a transformer 1 and a switch 4.
- the switch can be controlled by a control unit 5 according to a detected voltage U1 and / or an output voltage UA of the flyback converter FBC as described above.
- the harmonic filter feeds the smoothing capacitor 7, which provides a smoothed voltage U1 to the downstream flyback converter FBC.
- step S1 is entered in a first step - preferably manually by the user initiated phase control of the AC mains voltage. It is conceivable, of course, that such a phase angle is made by an external system, such as a brightness sensor system.
- step S2 an AC-DC conversion and harmonic smoothing of the phase-cut AC mains voltage is then carried out, preferably by means of an electrical energy store ES, such as a passive valley fill circuit PVF.
- step S4 this output voltage is changed by means of a DC / DC converter, such as a flyback converter FBC, according to a parameter determined according to the invention.
- step S6 an optional measurement of the actual dimming value, ie of the actual value, can now also be undertaken.
- a measurement of the LED current is suitable for this purpose.
- other methods such as voltage measurement or illumination measurement can be performed by means of a sensor. It is also conceivable that reference is made by means of a preferably fixed look-up table or that referencing takes place via the relative change of the measured voltage (S3 and / or S5).
- step S3 and / or S5 by measuring an output voltage of the passive valley fill circuit PVF and / or the flyback converter FBC has been made and thus to the setpoint specified in step S1, located in the phase angle of the AC mains voltage manifested, and additionally the actual actual value of the illumination, ie the actual dimming value has been measured in step S6, now in step S7 the parameter, ie the clock rate of the flyback converter FBC can be adjusted so that the actual actual value the setpoint corresponds as far as possible.
- a repetition, in particular of the steps S3 to S6, is of course advantageous for this, in order to equalize the actual value to the desired value.
- Fig. 6 a further exemplary embodiment of the illumination system according to the invention is shown.
- bleed circuit (a removal circuit) is provided between a rectifier GR and a PVF circuit.
- the "bleed circuit” represents a basic load for the phase or section dimmer, which can be switched on depending on, for example, the input voltage (such as in the region of the zero crossing) or the energy consumption of the load.
- An alternative dimming control can also take place via a switching method ("double-click" method).
- a switching method double-click
- a predetermined dimming value eg 30% light output
- the temporary suspension of the mains voltage by the secondary-side monitoring is detected by the temporary interruption of the primary-side clocking of the flyback converter FBC, since the breakdown of the voltage V RAIL for deactivating the driver 5 (FIG. Fig. 6 ) leads.
- V RAIL for deactivating the driver 5
- the switch 5 FIG. Fig. 6
- this is detected as a power interruption and further as a (double-click) switching operation. In the simplest case, this switches between two brightness values.
- the or another specific switching operation but can also be selected, for example, a mode in which an automatic dimming up and down. By a new switching process, a dimming value is then determined.
- the flyback converter FBC is mentioned in the description as an example of a clocked isolated operating circuit. However, it should be understood that other circuits, such as flow transducers (eg Common-mode flux transducers, push-pull flow transducers, ...) or (isolated) half-bridge converters can be used.
- flow transducers eg Common-mode flux transducers, push-pull flow transducers, ...) or (isolated) half-bridge converters can be used.
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Description
Die Erfindung betrifft ein Verfahren zum Dimmen von LED-Lampen wie LEDs und/oder OLEDs, insbesondere mittels Betriebsgeräten für Leuchtmittel. Dabei bezieht sich die Erfindung vor allem auf sogenannte 'Retrofit' LED-Lampen, die dafür ausgelegt sind, konventionelle Glühbirnen oder Halogenlampen zu ersetzen, und die dazu die entsprechenden mechanischen und elektrischen Anschlüsse aufweisen.The invention relates to a method for dimming LED lamps such as LEDs and / or OLEDs, in particular by means of operating devices for lamps. In particular, the invention relates to so-called 'retrofit' LED lamps, which are designed to replace conventional light bulbs or halogen lamps, and which have the corresponding mechanical and electrical connections.
Das Datenblatt von Power Integrations mit dem Titel "Low Cost Dimmable LED Ballast Using the Valley Fill Current Shaping Circuit" bezieht sich auf ein dimmbares LED-Vorschaltgerät.The Power Integrations datasheet entitled "Low Cost Dimmable LED Ballast Using the Valley Fill Current Shaping Circuit" refers to a dimmable LED ballast.
Der Einsatz von LEDs und/oder OLEDs zur Beleuchtung wird aufgrund ihrer positiven Eigenschaften, von denen vor allem ihre Energieeffizienz und ihre Langlebigkeit zu nennen sind, zunehmend gefordert. Dabei ist ein Aspekt der Einsatz von sogenannten Retrofit LED-Lampen vorteilhaft, bei dem bestehende Elektroinstallationen, wie Glühbirnenfassungen, Verkabelung und Schalter weiter verwendet werden können. Der Ersatz der ursprünglichen Leuchtmittel durch Retrofit LED-Lampen ist zunehmend gebräuchlich. Sie sind von unterschiedlichen Herstellern erhältlich, zumeist basierend auf einer Glühbirnengröße für E14 oder E27-Fassungen.The use of LEDs and / or OLEDs for lighting is increasingly required due to their positive characteristics, which are above all their energy efficiency and longevity. In this case, an aspect of the use of so-called retrofit LED lamps is advantageous in the existing electrical installations, such as light bulb sockets, wiring and switches can be used. The replacement of the original lamps with retrofit LED lamps is becoming increasingly common. They are available from different manufacturers, mostly based on a bulb size for E14 or E27 sockets.
Dabei ergibt sich jedoch grundsätzlich das Problem, dass die Größenabmessungen der Retrofit LED-Lampe durch diese Fassungen definiert werden, welche jedoch ursprünglich für die Konzipierung von konventionellen Glühbirnen ausgelegt waren. Retrofit LED-Lampen benötigen dagegen neben dem einen oder mehreren LED- oder OLED-Chips noch zusätzlich eine Ansteuerungselektronik und Kühlelemente. Somit stellt es ein Problem dar, die durch die Lampenfassungen vorgegebenen Abmessungen einzuhalten, und gleichzeitig eine funktionale und zuverlässige LED-Lampe bereitzustellen.However, there is basically the problem that the size dimensions of the retrofit LED lamp are defined by these versions, which were originally designed for the design of conventional light bulbs. Retrofit LED lamps, in contrast, need in addition to the one or more LED or OLED chips additionally control electronics and cooling elements. Thus, it is a problem to maintain the dimensions dictated by the lampholders while providing a functional and reliable LED lamp.
Gleichzeitig ergibt sich aber aus dem Einsatz von zusätzlicher Elektronik der Vorteil, dass grundsätzlich eine Adaptierbarkeit der Beleuchtung möglich ist. In diesem Zusammenhang ist insbesondere eine Dimmbarkeit der Beleuchtung erwünscht. Da jedoch bei Retrofit LED-Lampen gefordert wird, dass diese einzig durch die bereits vorhandene Elektroinstallation betrieben werden, sind die Steuerungsmöglichkeiten begrenzt. Die bisher wohl gebräuchlichste Art der Dimmung der Beleuchtung erfolgt über sogenannte Dimmschalter, bei denen es sich um dimmbare Tastschalter oder um drehbare Schalter handeln kann. Mittels dieser kann der Nutzer den Dimmwert der Beleuchtung steuern, indem insbesondere über eine Phasenanschnitts- oder Phasenabschnitts steuerung ein Dimmwert eingestellt wird. Bei herkömmlichen direkt angeschlossenen Glühlampen kann so die zugeführte Leistung eingestellt werden ("direct dimming"). Sollen nun jedoch stattdessen LEDs eingesetzt werden, so ist wie aus dem Stand der Technik bekannt eine recht aufwendige und platzeinnehmende Betriebsschaltung notwendig, die einen zur Stromversorgung parallelen Zweig aufweist, in dem der Phasenanschnitt separat gemessen und ausgewertet wird und deren Signal einer Steuerschaltung zugeführt wird, die dann den Betrieb der LEDs steuert ("indirect dimming").At the same time, however, the advantage arises from the use of additional electronics that in principle adaptability of the lighting is possible. In this context, in particular a dimming of the lighting is desired. However, as retrofit LED lamps are required to be operated solely by the existing electrical installation, control options are limited. The most common way of dimming the lighting so far is via so-called dimmer switches, which may be dimmable push-buttons or rotatable switches. By means of this, the user can control the dimming value of the lighting, in particular by setting a dimming value via a phase control or phase control. With conventional directly connected incandescent lamps, the supplied power can thus be adjusted ("direct dimming"). If, however, LEDs are now to be used instead, as known from the prior art, a rather complicated and space-consuming operating circuit is necessary which has a branch parallel to the power supply, in which the phase control is measured and evaluated separately and the signal of which is fed to a control circuit, which then controls the operation of the LEDs ("indirect dimming").
Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren zum Dimmen von Betriebsgeräten für Leuchtmittel, insbesondere Konverter für wenigstens eine LED und/oder OLED und ein hierfür ausgelegtes Betriebsgerät bereitzustellen, bei dem ein Dimmen über eine Phasenanschnittssteuerung auf eine vorteilhaftere Weise durchführbar ist.The invention is therefore an object of the invention to provide a method for dimming operating devices for lighting, in particular converter for at least one LED and / or OLED and an operating device designed for this purpose, in which a dimming over a phase control in a more advantageous manner is feasible.
Die Aufgabe wird durch die Merkmale der unabhängigen Ansprüche gelöst. Die abhängigen Ansprüche bilden den zentralen Gedanken der Erfindung in besonders vorteilhafter Weise weiter.The object is solved by the features of the independent claims. The dependent claims further form the central idea of the invention in a particularly advantageous manner.
Die Erfindung betrifft also ein Verfahren zum Dimmen von mittels eines Betriebsgeräts betriebenen Leuchtmitteln. Bei dem Betriebsgerät handelt es sich insbesondere um Konverter für wenigstens eine LED und/oder OLED. Dabei weist das Verfahren die folgenden Schritte auf: Es wird ein Phasenanschnitt einer Spannungsversorgung des Betriebsgeräts durchgeführt. Die Spannungsversorgung mit Phasenanschnitt wird zuerst einem Gleichrichter GR zugeführt und nach Gleichrichtung an einen Energiespeicher ES angelegt. Bei dem Energiespeicher ES handelt es sich insbesondere um eine Passive Valley Fill-Schaltung PVF (passive Leistungsfaktorkorrekturschaltung) des Betriebsgeräts. Die durch den Phasenanschnitt verursachte Schwankung und/oder Höhe der Ausgangsspannung des Energiespeichers ES wird ausgewertet. Somit wird, abhängig von dieser Ausgangsspannung ein die Lichtleistung der Leuchtmittel bestimmender Parameter des Betriebs einer -vorzugsweise nachgeschalteten-Betriebsschaltung gestellt. Schließlich wird noch die Ausgangsspannung des Energiespeichers ES, vorzugsweise über die Betriebsschaltung, zur Leistungsversorgung der Leuchtmittel weitergeführt. Hierbei ist der Energiespeicher ein Energiespeicher einer Leistungsfaktorkorrekturschaltung.The invention thus relates to a method for dimming lamps operated by means of an operating device. The operating device is in particular a converter for at least one LED and / or OLED. In this case, the method has the following steps: A phase control of a power supply of the operating device is performed. The power supply with phase control is first supplied to a rectifier GR and applied to an energy storage ES after rectification. The energy store ES is, in particular, a passive-valley-fill circuit PVF (passive power factor correction circuit) of the operating device. The fluctuation and / or level of the output voltage of the energy store ES caused by the phase gating is evaluated. Thus, depending on this output voltage, a parameter determining the light output of the luminous means is provided for the operation of a preferably downstream operating circuit. Finally, the output voltage of the energy store ES is continued, preferably via the operating circuit, for the power supply of the lighting means. In this case, the energy store is an energy store of a power factor correction circuit.
Der leistungsbestimmende Parameter kann dabei die Taktung eines Schalters, insbesondere die Anpassung des Tastverhältnisses und/oder die Frequenz, sein.The power-determining parameter may be the timing of a switch, in particular the adjustment of the duty cycle and / or the frequency.
Vorzugsweise weist die Betriebsschaltung einen Flyback-Konverter FBC, einen Halbbrücken-basierten Resonanzwandler und/oder eine PWM-Schaltung auf.The operating circuit preferably has a flyback converter FBC, a half-bridge-based resonant converter and / or a PWM circuit.
Ein Dimmen wird dabei vorzugsweise über Amplitudendimmen und/oder Pulsweitenmodulation (PWM) durchgeführt.Dimming is preferably carried out via amplitude dimming and / or pulse width modulation (PWM).
Die Ausgangsspannung des Energiespeichers kann der Betriebsschaltung zugeführt werden.The output voltage of the energy storage can be supplied to the operating circuit.
Der Energiespeicher ES kann ein Speicherkondensator, eine ein- oder mehrstufige Passive Valley Fill-Schaltung PVF und/oder eine Ladungspumpenschaltung (charge pump) aufweisen. Aber es können auch andere Schaltungen als Energiespeicher ES wie beispielsweise Hochsetzsteller und dgl. verwendet werden.The energy store ES may comprise a storage capacitor, a single-stage or multi-stage passive valley fill circuit PVF and / or a charge pump circuit. However, circuits other than energy storage ES such as boost converter and the like may be used.
Als Rückführsignal, d.h. als Istwert, wird vorzugsweise der Strom durch die wenigstens eine LED und/oder OLED gemessen.As a feedback signal, i. as the actual value, the current is preferably measured by the at least one LED and / or OLED.
Die Auswertung der Ausgangsspannung des Energiespeichers ES kann direkt und/oder indirekt erfolgen. Dies bedeutet, dass die Auswertung der Ausgangsspannung des Energiespeichers am Ausgang des Energiespeichers und/oder am Ausgang der Betriebsschaltung gemessen werden kann.The evaluation of the output voltage of the energy storage ES can be done directly and / or indirectly. This means that the evaluation of the output voltage of the energy store can be measured at the output of the energy store and / or at the output of the operating circuit.
Eine Dimmvorgabe, die vorzugsweise über einen Dimmschalter vom Benutzer eingestellt wird, ist vorzugsweise über den Phasenanschnitt einstellbar.A Dimmvorgabe, which is preferably set via a dimmer switch by the user, preferably via the phase control is adjustable.
Die Erfindung betrifft weiterhin ein Betriebsgerät zum Betreiben von Leuchtmitteln, insbesondere von wenigstens einer LED und/oder OLED. Der Betrieb erfolgt dabei durch eine mittels Phasenanschnittsdimmer gesteuerte Spannung, vorzugsweise einer Wechselspannung. Das Betriebsgerät weist dabei mindestens einen Gleichrichter GR und einen Energiespeicher ES, insbesondere eine Passive Valley Fill-Schaltung PVF, -vorzugsweise zum Gleichrichten und Glätten der Wechselspannung- auf. Weiterhin umfasst das Betriebsgerät eine -vorzugsweise dem Energiespeicher ES nachgeschaltete-Betriebsschaltung zum Betreiben des Leuchtmittels mit einem durch einen Parameter definierten Dimmwert. Schließlich weist das Betriebsgerät noch eine Steuerschaltung STS zur Auswertung der Ausgangsspannung des Energiespeichers ES auf. Außerdem ist die Steuerschaltung STS zur Bestimmung des Parameters des Betriebs der Betriebsschaltung ausgelegt. Die Bestimmung des Parameters erfolgt dabei in Abhängigkeit von der Ausgangsspannung des Energiespeichers ES und/oder der Betriebsschaltung. Hierbei ist der Energiespeicher ein Energiespeicher einer Leistungsfaktorkorrekturschaltung.The invention further relates to an operating device for operating lamps, in particular of at least one LED and / or OLED. The operation is carried out by a voltage controlled by Phasenanschnittsimmer dimmer, preferably an AC voltage. In this case, the operating device has at least one rectifier GR and an energy store ES, in particular a passive valley fill circuit PVF, preferably for rectifying and smoothing the AC voltage. Furthermore, the operating device comprises an operating circuit, preferably downstream of the energy store ES, for operating the lighting means with a dimming value defined by a parameter. Finally, the operating device also has a control circuit STS for evaluating the output voltage of the energy store ES. In addition, the control circuit STS for determining the parameter of Operation of the operating circuit designed. The determination of the parameter takes place as a function of the output voltage of the energy store ES and / or the operating circuit. In this case, the energy store is an energy store of a power factor correction circuit.
Die Betriebsschaltung weist dabei vorzugweise einen Flyback-Konverter FBC, einen halbbrückenbasierten Resonanzwandler und/oder eine PWM-Schaltung auf.The operating circuit preferably has a flyback converter FBC, a half-bridge-based resonant converter and / or a PWM circuit.
Der Energiespeicher ES umfasst vorzugsweise einen Speicherkondensator, eine ein- oder mehrstufige Passive Valley Fill-Schaltung PVF und/oder eine Ladungspumpe (charge pump).The energy store ES preferably comprises a storage capacitor, a single-stage or multi-stage passive valley fill circuit PVF and / or a charge pump.
Das Betriebsgerät ist weiterhin vorzugsweise zur Durchführung des oben genannten Verfahrens ausgelegt.The operating device is further preferably designed to carry out the above-mentioned method.
Außerdem behandelt die Erfindung eine LED-Lampe, insbesondere eine Retrofit LED-Lampe. Diese weist ein Leuchtmittel, insbesondere wenigstens eine LED und/oder OLED auf. Auch weist die LED-Lampe ein Betriebsgerät für Leuchtmittel auf, wie es oben beschrieben worden ist.In addition, the invention relates to an LED lamp, in particular a retrofit LED lamp. This has a lighting means, in particular at least one LED and / or OLED. Also, the LED lamp has an operating device for lighting means, as has been described above.
Schließlich behandelt die Erfindung noch ein dimmbares LED-Beleuchtungssystem. Dieses weist mindestens eine wie oben dargestellte LED-Lampe auf. Darüber hinaus weist es noch einen Phasenanschnitts- oder Phasenabschnittsdimmer auf.Finally, the invention still treats a dimmable LED lighting system. This has at least one LED lamp as shown above. In addition, it still has a phase angle or phase dimmer.
Weitere Eigenschaften, Vorteile und Merkmale werden dem Fachmann nunmehr anhand der folgenden ausführlichen Beschreibung eines Ausführungsbeispiels und unter Bezugnahme auf die Figuren der begleitenden Zeichnungen vermittelt.
- Fig. 1
- zeigt eine schematische Darstellung eines ersten Ausführungsbeispiels des erfindungsgemäßen dimmbaren LED-Beleuchtungssystems,
- Fig. 2
- zeigt eine schematische Darstellung eines zweiten Ausführungsbeispiels des erfindungsgemäßen dimmbaren LED-Beleuchtungssystems,
- Fig. 3
- zeigt eine schematische Darstellung eines ersten Ausführungsbeispiels des schaltungstechnischen Aufbaus des erfindungsgemäßen Betriebsgeräts,
- Fig. 4
- zeigt eine schematische Darstellung eines zweiten Ausführungsbeispiels des schaltungstechnischen Aufbaus des erfindungsgemäßen Betriebsgeräts,
- Fig. 5
- zeigt eine schematische Darstellung eines dritten Ausführungsbeispiels des erfindungsgemäßen dimmbaren LED-Beleuchtungssystems, und
- Fig. 6
- zeigt eine schematische Darstellung eines weiteren Ausführungsbeispiels des erfindungsgemäßen dimmbaren LED-Beleuchtungssystems.
- Fig. 1
- shows a schematic representation of a first embodiment of the dimmable LED lighting system according to the invention,
- Fig. 2
- shows a schematic representation of a second embodiment of the dimmable LED lighting system according to the invention,
- Fig. 3
- shows a schematic representation of a first embodiment of the circuit construction of the operating device according to the invention,
- Fig. 4
- shows a schematic representation of a second embodiment of the circuit construction of the operating device according to the invention,
- Fig. 5
- shows a schematic representation of a third embodiment of the dimmable LED lighting system according to the invention, and
- Fig. 6
- shows a schematic representation of another embodiment of the dimmable LED lighting system according to the invention.
In
Diese führt eine Oberwellenfilterung durch, wobei hierfür ein zusätzlicher zwischengeschalteter Gleichrichter vorgesehen sein kann, und gibt die entsprechende Gleichspannung an eine Betriebsschaltung, wie einen Flyback-Konverter FBC weiter. Auch die weiteren Beispiele werden anhand eines Flyback-Konverters erklärt als Betriebsschaltung können aber auch andere Konverter verwendet werden wie aus dem Stand der Technik hinreichend bekannt sind. Der in diesem Beispiel verwendete Flyback-Konverter FBC als Betriebsschaltung regelt die sekundärseitige Gleichspannung, fungierend als DC/DC-Wandler, entsprechend eines an ihm eingestellten Betriebsparameters und versorgt mit dieser eingestellten Gleichspannung eine oder mehrere LEDs und/oder OLEDs. Eine Steuerschaltung STS legt dabei den Betriebsparameter für die Betriebsschaltung fest. Die Bestimmung des Betriebsparameters erfolgt dabei auf Basis der Ausgangsspannung des Energiespeichers ES und/oder der Betriebsschaltung. Zusätzlich kann als weitere Referenz der LED-Strom gemessen werden.This performs a harmonic filtering, in which case an additional intermediate rectifier can be provided, and outputs the corresponding DC voltage to an operating circuit, such as a flyback converter FBC on. The other examples are explained with reference to a flyback converter as the operating circuit but other converters can be used as are well known from the prior art. The flyback converter FBC used as operating circuit in this example controls the secondary-side DC voltage, acting as a DC / DC converter, according to an operating parameter set on it and supplies one or more LEDs and / or OLEDs with this set DC voltage. A control circuit STS defines the operating parameter for the operating circuit. The determination of the operating parameter takes place on the basis of the output voltage of the energy store ES and / or the operating circuit. In addition, the LED current can be measured as a further reference.
Zentraler Punkt der Erfindung ist, dass das Phasenanschnittssignal, also die entsprechend modulierte Netzspannung, die gemäß dem vom Nutzer vorgegebenen Sollwert entspricht, nach der Gleichrichtung durch einen Gleichrichter GR einer Passive Valley Fill-Schaltung PVF zugeführt wird. Erfindungsgemäß wurde herausgefunden, dass die Ausgangsspannung der Passive Valley Fill-Schaltung PVF den Phasenanschnitt wiedergibt. Daher kann also nun indirekt, d.h. beispielsweis am Ausgang der Betriebsschaltung, oder direkt am Ausgang der Passive Valley Fill-Schaltung PVF die Ausgangsspannung gemessen werden, um daraus auf den vom Nutzer mittels Phasenanschnitt gewünschten Dimmwert zu schließen. Es wird also die Ausgangsspannung mittels der Steuerschaltung STS in eine Art Dimmwertvorgabe umgesetzt, so dass in der LED dann die Dimmwertvorgabe in der Steuerschaltung STS in einen leistungsbestimmenden Parameter umgesetzt wird. Bei der Ausgangsspannung der Passive Valley Fill-Schaltung PVF handelt es sich um eine Art Busspannung.The central point of the invention is that the phase-angle signal, that is, the correspondingly modulated mains voltage, which corresponds to the setpoint specified by the user, is supplied after rectification by a rectifier GR to a passive-valley-fill circuit PVF. According to the invention, it has been found that the output voltage of the passive valley fill circuit PVF represents the phase angle. Therefore, therefore, indirectly, ie, for example, at the output of the operating circuit, or directly at the output of the passive-valley-fill circuit PVF, the output voltage can be measured to from the user close by means of phase angle desired dimming value. Thus, the output voltage is converted by means of the control circuit STS into a kind of dimming value specification, so that the dimming value specification in the control circuit STS is then converted into a power-determining parameter in the LED. The output voltage of the passive-valley-fill circuit PVF is a type of bus voltage.
Wenn die Ausgangsspannung der Passive Valley Fill-Schaltung PVF einem Flyback-Konverter FBC zugeführt wird, kann die Auswertung der Busspannung, wie in
- Vorgabe eines Sollwerts durch einen Phasenanschnittsdimmer, welcher von einem Nutzer mittels Dimmschalter eingestellt wird,
- Auswertung dieses Sollwerts durch direkte oder indirekte Auswertung der Ausgangsspannung einer Passive Valley Fill-Schaltung PVF, vorzugsweise mit Hilfe einer Steuerschaltung STS, bei der es sich um eine integrierte Schaltung, wie beispielsweise ein ASIC, einen Mikrocontroller, eine Hybridschaltung oder eine Kombination aus diesen Schaltungen handeln kann,
- vorzugsweise eine zusätzliche Messung des LED-Stroms durch die LED, welcher als Referenzwert, d.h. also als Ist-Wert des tatsächlich vorherrschenden Dimmwerts verwendet wird, und
- Verwendung des Duty Cycles, d.h. des Tastverhältnisses des Flyback-Konverters FBC als Steuergröße.
- Specification of a setpoint by a phase control dimmer, which is set by a user by means of dimmer switch,
- Evaluation of this setpoint by direct or indirect evaluation of the output voltage of a passive valley fill circuit PVF, preferably by means of a control circuit STS, which is an integrated circuit, such as an ASIC, a microcontroller, a hybrid circuit or a combination of these circuits can act,
- Preferably, an additional measurement of the LED current through the LED, which is used as a reference value, ie as the actual value of the actual prevailing Dimmwerts, and
- Use of the duty cycle, ie the duty cycle of the flyback converter FBC as a control variable.
Erfindungsgemäß besteht der Vorteil des gezeigten dimmbaren Beleuchtungssystems, bzw. des korrespondierenden Verfahrens darin, dass die Art der dimmbaren Betriebsschaltung für eine LED-Strecke einen Platzbedarf hat, der die geringe Baugröße beispielsweise einer E14 Kerzenlampe nicht überschreitet.According to the invention, the advantage of the dimmable lighting system shown or of the corresponding method is that the type of dimmable operating circuit for an LED track has a space requirement which does not exceed the small size of an E14 candle lamp, for example.
Dabei wirkt es sich besonders vorteilhaft aus, dass bei der Passive Valley Fill-Schaltung PVF die in Serie geschalteten Kondensatoren jeweils nur mit der halben Netzspannungsamplitude aufgeladen werden, womit diese geringer in ihrer Spannungsfestigkeit ausgelegt werden können. Somit verringert sich der Platzbedarf der Kondensatoren entsprechend. Beim Entladen liegt funktionell eine Parallelschaltung der beiden Kondensatoren der Passive Valley Fill-Schaltung PVF vor, so dass dann wieder die volle Kapazität zur Verfügung steht.It has a particularly advantageous effect that in the case of the passive-valley-fill circuit PVF, the capacitors connected in series are charged in each case with only half the mains voltage amplitude, with the result that they can be designed to be lower in their dielectric strength. Thus, the space required by the capacitors decreases accordingly. During discharge, there is a functionally parallel connection of the two capacitors of the Passive Valley Fill circuit PVF before, so that then the full capacity is available again.
Allgemein betrachtet handelt es sich also bei der Passive Valley Fill-Schaltung PVF in
Wie bereits erwähnt wird vorzugsweise ein Amplitudendimmen der LED, insbesondere mittels eines sogenannten Flyback-Konverters FBC, durchgeführt. Dabei wird also mittels des erfindungsgemäßen Einstellens der Tastrate des Schalters des Flyback-Konverters FBC die Amplitude entsprechend dem durch die Steuerschaltung STS gestellten Dimmsollwert eingestellt. Eine Überprüfung, d. h. eine Referenzierung ob der genannte Dimmsollwert auch korrekt umgesetzt worden ist, kann über eine Messung des LED-Stroms als Ist-Wert durchgeführt werden. Nun ist es jedoch alternativ oder zusätzlich denkbar, dass eine Pulsweitenmodulation zur Dimmung der LED durchgeführt wird.As already mentioned, an amplitude dimming of the LED is preferably carried out, in particular by means of a so-called flyback converter FBC. In this case, therefore, the amplitude is adjusted according to the invention by adjusting the sampling rate of the switch of the flyback converter FBC according to the dimming setpoint provided by the control circuit STS. A review, d. H. A referencing whether the said dimming setpoint has also been correctly implemented, can be carried out via a measurement of the LED current as an actual value. However, it is alternatively or additionally conceivable that a pulse width modulation for dimming the LED is performed.
Es kann also neben dem erfindungsgemäßen analogen Amplitudendimmen auch ein Dimmen über eine PWM Modulation der LED typischerweise im Bereich von 100 Hz bis 1kHz durchgeführt werden. Denkbar ist ebenfalls, dass die PWM-Modulation dadurch erfolgt, dass im 100-Hertz-Raster die LED nun für eine variable Zeitdauer eingeschaltet wird. Selbstverständlich ist bei einer PWM-Modulation der potentielle Nachteil zu beachten, dass visuelle Effekte wie flimmern, etc. auftreten können und daher diejenigen Zeitabstände in denen alle LEDs ausgeschaltet sind nicht zu groß werden sollten, d. h. ebenfalls die Frequenz bzw. die PWM-Dimmrate nicht zu niedrig sein sollte.Thus, in addition to the analog amplitude dimming according to the invention, it is also possible to perform a dimming via a PWM modulation of the LED, typically in the range from 100 Hz to 1 kHz. It is also conceivable that the PWM modulation takes place in that the LED is now switched on for a variable period of time in the 100 hertz grid. Of course, PWM modulation has the potential drawback that visual effects such as flicker, etc. may occur, and therefore those intervals in which all the LEDs are turned off should not be too large; H. also the frequency or the PWM dimming rate should not be too low.
Das Betriebsgerät weist also bezugnehmend auf
In dieser PVF - Schaltung werden zwei Ladekondensatoren C11 und C12 eines Oberwellenfilters PVF (Passive-Valley-Fill Schaltung) im Bereich des Netzspannungsmaximums über die Serienschaltung der Gleichrichterdiode D12 und des Vorwiderstands R im Brückenzweig des Oberwellenfilters PVF seriell aufgeladen, und zwar unter der Annahme, dass die Kapazitäten der Kondensatoren C11 und C12 den gleichen Wert aufweisen -jeweils auf die Hälfte des Spitzenwerts- der Eingangsnetzspannung -abzüglich der Schwellspannungen der beiden Gleichrichterdioden eines dem Oberwellenfilter vorgeschalteten Netzgleichrichters AC/DC (in
Im Bereich des Nulldurchgangs der Netzspannung (Netzspannungsminimum) werden die beiden Ladekondensatoren C11 und C12 über die Gleichrichterdioden D11 bzw. D13 parallel entladen und liefern dabei solange einen lastabhängigen Ausgangsstrom Ira, bis die gleichgerichtete Spannung am Ausgangstor des Netzgleichrichters AC/DC im Verlauf der nächsten Ladephase der Kondensatoren C11 und C12 wieder auf die Hälfte des Spitzenwerts ÛNetz der Eingangsnetzspannung UNetz angestiegen ist. Die Dauer der Entladephase der beiden Kondensatoren C11 und C12 kann dabei näherungsweise 37 % der Dauer eines vollständigen Lade-/Entladezyklus betragen, gefolgt von einer Leerlaufphase.In the area of the zero crossing of the mains voltage (mains voltage minimum), the two charging capacitors C11 and C12 are discharged in parallel via the rectifier diodes D11 and D13, thereby supplying a load-dependent output current Ira until the rectified voltage at the output port of the mains rectifier AC / DC during the next charging phase of the capacitors C11 and C12 has risen again to half the peak value Û mains of the input mains voltage U network . The duration of the discharge phase of the two capacitors C11 and C12 may be approximately 37% of the duration of a complete charge / discharge cycle, followed by an idle phase.
Bei Erreichen des Spitzenwerts Netz der Eingangsspannung UNetz beginnt wiederum eine neue Ladephase. Die Grösse und Dauer des einsetzenden Ladestroms IBr ist dabei eine Funktion der während der Entladephase von den Kondensatoren C11 und C12 freigesetzten Gesamtladung Qges und der Grösse des Brückenwiderstands R im Ladekreis.When reaching the peak value of the input voltage U network , a new charging phase begins again. The size and duration of the onset of the charging current I Br is a function of the total charge Qges released during the discharge phase by the capacitors C11 and C12 and the magnitude of the bridge resistance R in the charging circuit.
Ein vorgeschalteter LC-Tiefpassfilter TPF im Eingangskreis (in
Am Ausgang des Oberwellenfilters PVF ist eine Betriebsschaltung, vorzugsweise aufweisend einen Flyback-Konverter FBC, angeschlossen. Dieser wird von einer Steuerschaltung STS geregelt, die als Dimm-Sollwertvorgabe auf oben beschriebene Weise die Ausgangsspannung der Betriebsschaltung und/oder des Energiespeichers ES misst und auswertet. Am Ausgang der Betriebsschaltung ist eine LED-Strecke anschließbar, wobei noch eine regelbare PWM-Schaltung dazwischen geschaltet sein kann. Zum korrekten Betreiben der LEDs kann der Lastkreis noch weitere Schaltungselemente aufweisen, wie es aus dem Stand der Technik hinreichend bekannt ist.At the output of the harmonic filter PVF an operating circuit, preferably comprising a flyback converter FBC, connected. This is controlled by a control circuit STS, which measures and evaluates the output voltage of the operating circuit and / or the energy store ES as a dimming setpoint specification in the manner described above. At the output of the operating circuit, an LED track can be connected, wherein still a controllable PWM circuit can be connected in between. For the correct operation of the LEDs, the load circuit may have further circuit elements, as is well known from the prior art.
In
Abschließend soll noch ein Überblick über den Ablauf eines erfindungsgemäßen Verfahrens gegeben werden. Dabei wird in einem ersten Schritt S1 ein - vorzugsweise vom Nutzer manuell initiierter- Phasenanschnitt der AC-Netzspannung durchgeführt. Denkbar ist dabei natürlich auch, dass ein solcher Phasenanschnitt von einem externen System, wie beispielsweise einem Helligkeitssensorsystem vorgenommen wird. In Schritt S2 wird daraufhin eine AC-DC-Wandlung und Oberwellenglättung der phasenangeschnittenen AC-Netzspannung, vorzugsweise mittels eines elektrischen Energiespeichers ES, wie einer Passive Valley Fill-Schaltung PVF durchgeführt. In Schritt S4 wird diese Ausgangsspannung mittels eines DC/DC-Wandlers, wie beispielsweise eines Flyback-Konverters FBC entsprechend eines Parameters, der erfindungsgemäß bestimmt wird, verändert. Es kann nun dabei sowohl in einem Schritt S3 als auch in Schritt S5 eine Spannungsmessung vorgenommen werden, wobei in Schritt S3 die Ausgangsspannung der Passive Valley Fill-Schaltung PVF vorgenommen wird, und in Schritt S5 eine Messung der Ausgangspannung des Flyback-Konverters FBC. In Schritt S6 kann nun optional noch eine Messung des tatsächlichen Dimmwerts, d. h. des Ist-Werts vorgenommen werden. Hierfür bietet sich insbesondere eine Messung des LED-Stroms an. Alternativ können jedoch auch andere Verfahren wie beispielsweise Spannungsmessung oder Beleuchtungsmessung mittels einer Sensorik durchgeführt werden. Auch denkbar ist, dass mittels einer vorzugsweise festgelegten Look-Up-Tabelle referenziert wird oder dass ein Referenzieren über die relative Änderung der gemessenen Spannung (S3 und/oder S5) erfolgt. Nachdem also nun in Schritt S3 und/oder S5 mittels Messung einer Ausgangsspannung der Passive Valley Fill-Schaltung PVF und/oder des Flyback-Konverters FBC vorgenommen worden ist und somit auf den in Schritt S1 vorgegebenen Sollwert, der sich im Phasenanschnitt der AC-Netzspannung manifestiert, und zusätzlich noch der tatsächliche Ist-Wert der Beleuchtung, d. h. der tatsächliche Dimmwert in Schritt S6 gemessen worden ist, kann nun in Schritt S7 der Parameter, d. h. die Taktrate des Flyback-Konverters FBC so angepasst werden, dass der tatsächlich Ist-Wert dem Sollwert nach Möglichkeit entspricht. Hierfür ist natürlich insbesondere eine Wiederholung insbesondere der Schritte S3 bis S6 vorteilhaft, um so den Ist-Wert an den Sollwert anzugleichen.
In der
In the
Eine alternative Dimmsteuerung kann auch über ein Schaltverfahren ("double click"-Verfahren) erfolgen. Durch eine bestimmte Folge von (Dimm-)Schalter-/Reglerbetätigungen (double-click) kann ein vorbestimmter Dimmwert (z.B. 30% Lichtleistung) direkt gewählt werden. Dabei wird das zeitweise Aussetzen der Netzspannung durch die sekundärseitige Überwachung (siehe
Der Flyback-Konverter FBC ist in der Beschreibung als Beispiel für eine getaktete potentialgetrennte Betriebsschaltung angeführt. Es ist jedoch zu verstehen, dass stattdessen auch andere Schaltungen, wie z.B. Durchflußwandler (z.B. Gleichtaktflusswandler, Gegentaktflusswandler, ...) oder (isolierte) Halbbrückenwandler, zum Einsatz kommen können.The flyback converter FBC is mentioned in the description as an example of a clocked isolated operating circuit. However, it should be understood that other circuits, such as flow transducers (eg Common-mode flux transducers, push-pull flow transducers, ...) or (isolated) half-bridge converters can be used.
Claims (13)
- A method for dimming luminous means operated by means of an operating device, in particular a converter for at least one LED and/or OLED, having the following steps:- phase control of a power supply of the operating device,- feeding the power supply having phase control to an energy store (ES, PVF), in particular a passive valley fill circuit, i.e., a passive power factor correcting circuit, of the operating device,- evaluating the output voltage of the energy store (ES, PVF), in particular the variance of the output voltage of the energy store (ES, PVF) caused by the phase control in order to independently set the parameters determining the lighting power of the luminous means for operating an operating circuit (FBC) connected downstream thereof, and- conducting the output voltage of the energy store (ES, PVF) (FBC) to the power supply of the luminous means, wherein the energy store (ES, PVF) is an energy store of a power factor correcting circuit.
- A method according to Claim 1,
wherein the clocking of a switch is set as the parameter determining the lighting power. - A method according to the preceding claim,
wherein a dimming is carried out via amplitude dimming and/or pulse width modulation (PWM). - A method according to any one of the preceding claims,
wherein the output voltage of the energy store (ES, PVF) is fed to the operating circuit (FBC). - A method according to any one of the preceding claims,
wherein the current is measured through the at least one LED and/or OLED as the feedback signal, i.e., as the actual value. - A method according to any one of the preceding claims,
wherein the evaluation of the output voltage of the energy store (ES, PVF) takes place directly or indirectly, i.e., at the output of the energy store (ES, PVF) and/or at the output of the operating circuit (FBC). - A method according to any one of the preceding claims,
wherein a dimming specification can be set by means of the phase control and/or by means of a manually triggered switching process. - An operating device for operating a luminous means, in particular of at least one LED and/or OLED, by a voltage controlled by means of a phase control dimmer, having:- at least one energy store (ES, PVF), in particular a passive valley fill circuit,- an operating circuit (FBC) for operating the luminous means with a dimming value determined by a parameter, and- a control circuit (STS) for evaluating the output voltage of the energy store (ES, PVF) and for determining the parameter of the operation of the operating circuit (FBC), wherein the determination of the parameter is carried out depending on the output voltage of the energy store (ES, PVF), characterized in that- the energy store (ES, PVF) is an energy store of a power factor correcting circuit.
- An operating device according to Claim 8,
wherein the operating circuit (FBC) has a flyback converter, a half bridge-based resonance converter, an extraction circuit and/or a PWM circuit. - An operating device according to any one of Claims 8 or 9,
wherein the energy store (ES, PVF) has a simple rectifier bridge with a downstream storage capacitor, a single or multi-stage passive valley fill circuit and/or a charge pump circuit. - An operating device according to any one of Claims 8-10,
designed for implementing the method according to any one of claims 1-7. - An LED lamp, in particular a retrofit LED lamp,
having a luminous means, in particular at least one LED and/or OLED, and an operating device for a luminous means according to any one of Claims 8-11. - A dimmable LED lighting system, having at least one LED lamp according to Claim 12 as well as a phase control dimmer.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010031526 | 2010-07-19 | ||
DE102010039150 | 2010-08-10 | ||
DE102011002830A DE102011002830A1 (en) | 2010-07-19 | 2011-01-18 | Dimmable LED lamp |
PCT/EP2011/061946 WO2012010477A1 (en) | 2010-07-19 | 2011-07-13 | Dimmable led lamp |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2596686A1 EP2596686A1 (en) | 2013-05-29 |
EP2596686B1 true EP2596686B1 (en) | 2019-01-23 |
Family
ID=45403072
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11741420.1A Active EP2596686B1 (en) | 2010-07-19 | 2011-07-13 | Dimmable led lamp |
Country Status (4)
Country | Link |
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EP (1) | EP2596686B1 (en) |
CN (1) | CN103026798A (en) |
DE (1) | DE102011002830A1 (en) |
WO (1) | WO2012010477A1 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2654385B1 (en) | 2012-04-17 | 2017-11-08 | Helvar Oy Ab | An apparatus, a method, an arrangement and a computer program for controlling operation of a power supply circuit |
CN102665343B (en) * | 2012-05-07 | 2015-09-16 | 佛山市华全电气照明有限公司 | The special light adjusting circuit of a kind of integrated LED lamp |
CN102904436B (en) * | 2012-10-22 | 2016-01-20 | 张逸兴 | A kind of Novel power factor correction circuit |
AT13793U1 (en) * | 2012-11-16 | 2014-08-15 | Tridonic Gmbh & Co Kg | Operating device for a lamp and method for dimming a lamp |
WO2014187921A2 (en) * | 2013-05-23 | 2014-11-27 | Zentrum Mikroelektronik Dresden Ag | Assembly and a method for activating leds |
DE102013215334A1 (en) * | 2013-08-05 | 2015-02-05 | Tridonic Gmbh & Co Kg | Dimmable LED light path |
AT14739U1 (en) | 2013-08-19 | 2016-05-15 | Tridonic Gmbh & Co Kg | Primary-side controlled constant current converter for lighting equipment |
DE102013224760B4 (en) | 2013-12-03 | 2022-09-29 | Tridonic Gmbh & Co Kg | Driver circuit and method for operating a dimmable LED line in a two-zone dimming range |
CN104797062B (en) * | 2015-05-13 | 2017-04-26 | 魏其萃 | Non-strobe high-efficiency LED (light-emitting diode) driving manner compatible with phase-controlled light modulator |
DE102016221741A1 (en) * | 2016-11-07 | 2018-05-09 | Tridonic Gmbh & Co Kg | Driver for a light emitting diode and method |
CN106793274A (en) * | 2016-12-12 | 2017-05-31 | 浙江大学 | LED driver without electrolytic capacitors based on electric capacity series parallel structure |
CN107580393B (en) * | 2017-09-25 | 2023-11-07 | 国创能源互联网创新中心(广东)有限公司 | LED driving power supply and lamp |
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US7649327B2 (en) * | 2006-05-22 | 2010-01-19 | Permlight Products, Inc. | System and method for selectively dimming an LED |
CN101193479B (en) * | 2006-11-30 | 2010-12-15 | 财团法人工业技术研究院 | LED AC multi-phase drive device and its control method |
-
2011
- 2011-01-18 DE DE102011002830A patent/DE102011002830A1/en not_active Withdrawn
- 2011-07-13 CN CN2011800353760A patent/CN103026798A/en active Pending
- 2011-07-13 WO PCT/EP2011/061946 patent/WO2012010477A1/en active Application Filing
- 2011-07-13 EP EP11741420.1A patent/EP2596686B1/en active Active
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WO2012010477A1 (en) | 2012-01-26 |
EP2596686A1 (en) | 2013-05-29 |
DE102011002830A1 (en) | 2012-01-19 |
CN103026798A (en) | 2013-04-03 |
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