EP1732364B1 - Circuit arrangement and method for controlling the power of an electronic ballast in dependence of the line voltage - Google Patents
Circuit arrangement and method for controlling the power of an electronic ballast in dependence of the line voltage Download PDFInfo
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- EP1732364B1 EP1732364B1 EP06011520.1A EP06011520A EP1732364B1 EP 1732364 B1 EP1732364 B1 EP 1732364B1 EP 06011520 A EP06011520 A EP 06011520A EP 1732364 B1 EP1732364 B1 EP 1732364B1
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- system voltage
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- threshold value
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- 238000000034 method Methods 0.000 title claims description 11
- 230000003247 decreasing effect Effects 0.000 claims description 15
- 230000033228 biological regulation Effects 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 230000001419 dependent effect Effects 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 description 18
- 238000010586 diagram Methods 0.000 description 10
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000003828 downregulation Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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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
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
- H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2851—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
- H05B41/2853—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal power supply conditions
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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
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/295—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
- H05B41/298—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2981—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
- H05B41/2983—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal power supply conditions
Definitions
- the invention relates to a circuit arrangement for mains voltage-dependent power control of an electronic device and a method for mains voltage-dependent power control of such an electronic device. Moreover, the invention relates to an electronic ballast, which has a circuit arrangement for mains voltage-dependent power control.
- electronic ballasts are provided for operating and adjusting electric lamps, in particular fluorescent lamps.
- Such electronic ballasts are electrically connected between a network and the electric lamp and limit and regulate the one hand, the lamp current and on the other hand ensure safe ignition under the specific conditions.
- high values of the recorded mains input current occur in the case of a mains undervoltage.
- the absorbed current increases again, which leads to a battery power supply that this battery is discharged faster or has a shorter life.
- high loads also occur on the input components during this operation.
- the recording of the electrical power of the electronic ballast is curtailed when it falls below a certain input voltage.
- the dimensioning of the down regulation and the design of the components is based on the stronger loads in DC operation.
- AC operation AC operation
- the reduction control with the same dimensions is used sustainably even at higher values of the mains undervoltage.
- the working voltage range is expanded (eg 220V to 240VAC)
- the reduction may not be too early.
- the DE 100 56 347 A1 discloses a method of monitoring the performance of a film or video recording light and circuitry therefor.
- the circuit is always connected to a battery, a network operation is not provided.
- the US 2003/0102821 discloses a circuit arrangement for operating a low-pressure discharge lamp.
- the circuit arrangement is always connected to a supply network, an operation on a DC voltage such as a battery and its detection is not provided.
- the EP 0 563 801 A1 discloses an electronic ballast for operating a low pressure discharge lamp.
- the circuit arrangement has a recognition of the type of input voltage, and in battery operation, a power feedback control is provided. A power feedback control in network operation is not provided.
- the EP 0 450 728 A2 discloses an electronic operating device, which is designed for a network operation and for battery operation. The input voltage is measured and depending on the performance of the electronic control gear set.
- the EP 1 271 745 A1 discloses a method and apparatus for operating electrical end users that may be powered by a grid or a battery.
- the device has a frequency counter, by means of which operation on the network or on the battery can be detected.
- various services are set and / or end consumers are switched off.
- FIG. 1 is a control characteristic of an electrical power is shown, in which case a system performance, which characterizes the male electrical power of the electronic ballast, is plotted as a function of the mains voltage.
- a regulation of the recording of the electrical power of the electronic ballast takes place without a finding that whether a DC operation or an AC operation of the electronic ballast is present.
- the power consumption of the electronic ballast is thus reduced virtually quasi-flat if there is a drop below a certain input voltage.
- a DC operation DC operation
- the electrical power is kept substantially constant at mains voltages with values greater than a first mains voltage control value, which is approximately at 160V, up to this first mains voltage control value.
- a first mains voltage control value which is approximately at 160V
- a second mains voltage threshold which is in FIG. 1 is about 125V
- the absorption of electrical power is reduced. If the mains voltage falls below this second mains voltage threshold, the electronic ballast is switched off and thus logically reduces the absorption of the electrical power to zero.
- the reduction in the case of an AC operation adversely affects even at higher values of the mains voltage. How to do that FIG.
- the object is achieved by a circuit arrangement having the features of claim 1, and an electronic ballast having the features of claim 8, solved. Furthermore, the object is achieved by a method for mains voltage-dependent power control of an electronic device having the features of claim 10.
- a circuit arrangement for line voltage-dependent power control of an electronic device comprises means with which a direct current operation or an alternating current operation of the electronic device can be detected. Another essential idea of the invention is to be seen in that the circuit arrangement also has a control unit in which at least one characteristic for a DC operation and at least one characteristic for an AC operation is stored, wherein the control unit is designed such that depending on the detected operation of electronic device, a regulation of the electronic device to be included in the electrical power according to the associated characteristic is feasible.
- Each of the characteristic curves characterizes a course of a system power or an electrical power to be absorbed by the electronic device as a function of the mains voltage.
- the means with which the operation of the electronic device is detectable advantageously comprise a discriminator stage.
- the stored in the control unit characteristic for DC operation and the stored characteristic for AC operation have at least partially different characteristics curves.
- the control unit according to the invention is designed such that in the case of a detected DC operation, a power control is performed such that the electrical power is kept substantially constant with a drop in the mains voltage up to a first Netzwoodsschwellwert. Furthermore, the control unit is designed such that in the case of a detected DC operation, a power control is carried out such that the electrical power is lowered at a fall in the mains voltage below the first mains voltage threshold continuously decreasing up to a second mains voltage threshold.
- the control unit is also designed such that in the case of a detected DC operation, a power control is performed such that when a drop in the mains voltage below the second mains voltage threshold, the electronic device is turned off.
- the control unit is designed such that in the case of such a detected AC operation, a power control is performed so that the electric power at a drop in the mains voltage up to a third Netzwoodsschwellwert in Is kept substantially constant and the electrical power is lowered at a fall in the mains voltage below the third Netzwoodsschwellwert continuously decreasing up to a fourth Netzwoodsschwellwert.
- the control unit is preferably designed such that in the case of a detected AC operation, a power control is performed such that at a drop in the mains voltage below the fourth mains voltage threshold, the electronic device is also switched off.
- the first and / or the second mains voltage threshold value and the third and / or the fourth mains voltage threshold value can be variably determined in an advantageous manner.
- the first and third mains voltage threshold and the second and fourth mains voltage thresholds are the same.
- the continuous drop in electrical power between the first and second grid voltage thresholds is advantageously steeper than the continuous drop in electrical power between the third and fourth grid voltage thresholds.
- the electronic device is designed as an electronic ballast.
- electronic ballasts with a PFC (Power Factor Correction) input stage thus a mains voltage-dependent power control can be performed in an optimized manner.
- the electrical output power of the PFC input stage can be regulated depending on the mains voltage.
- Another aspect of the invention relates to an electronic ballast for operating electric lamps, in particular fluorescent lamps, which has a circuit arrangement according to the invention or an advantageous embodiment of the circuit arrangement according to the invention.
- FIG. 2 a simplified block diagram representation of an electronic ballast 3 is shown, which has a circuit arrangement according to the invention.
- the circuit arrangement according to the invention comprises a discriminator stage 31 with which it is detected whether a DC operation or an AC operation of the electronic ballast 3 is present.
- the electronic ballast 3 comprises a control unit 32 which is electrically connected to the discriminator 31.
- a system power-mains voltage characteristic 321 power-mains voltage characteristic
- a system power mains voltage characteristic 322 power-mains voltage characteristic for an AC operation of the electronic ballast 3 is stored.
- the control unit 32 is electrically connected to a PFC input stage 33 of the electronic ballast 3.
- the curves of curves 321 and 322 are shown.
- the characteristic curve 321 stored for the DC operation of the electronic ballast 3 is substantially constant above a first mains voltage threshold, which in the embodiment shown is at a mains voltage threshold of approximately 180V.
- the system performance of the electronic ballast 3 is adjusted in accordance with the sloping characteristic shown. If, in the DC operation of the electronic ballast 3, the mains voltage applied to the electronic ballast 3 drops below the second mains voltage threshold at approximately 140V, the electronic ballast 3 is switched off.
- the characteristic curve 322 shown which is used to control the system performance in an AC operation of the electronic ballast 3 of the control unit 32.
- a third mains voltage threshold which corresponds to the first Netzwoodsschwellwert in the embodiment shown, and thus also is approximately at 180V, a constant power control.
- a fourth mains voltage threshold which in the exemplary embodiment corresponds to the second mains voltage threshold and is therefore approximately 140V, a continuously decreasing power control takes place.
- the electronic ballast 3 is switched off in AC operation falls below the fourth mains voltage threshold.
- the slope of the characteristic 321 in the range between the first and the second mains voltage threshold is steeper than the slope of the characteristic 322 between the third and the fourth mains voltage threshold.
- This control behavior contributes to the extension of the service life of the battery supply after falling below the first mains voltage threshold.
- the system performance or the electrical power of the electronic ballast 3 in DC operation between the first and the second Netzwoodsschwellwert from a value of about 100 is adjusted to a value of about 60.
- the values 100 and 60 indicate the system performance in percent of the rated power of the electronic ballast 3.
- the system power between the third and the fourth mains voltage threshold value is reduced from a value of about 100 to a value of about 80.
- the characteristics 321 and 322 can also be shifted from each other. It is also possible that the first and third Netzwoodsschwellwert and / or the second and fourth Netzwoodsschwellwert differ from each other.
- the system in DC operation, when the first mains voltage threshold value is undershot, the system is also switched directly to a significantly reduced system performance, in which, for example, the system power is immediately reduced to a value of approximately 60%.
- FIG. 4 shows an embodiment of a circuit arrangement.
- a mains voltage UN generates via a rectifier GL a rectified mains voltage UGL with respect to a reference potential GND.
- a choke L01, a diode D01 and a transistor T01 are connected in a known manner as a step-up converter, which generates a bus voltage UBUS on a storage capacitor C01.
- the bus voltage UBUS feeds an electronic ballast ECG for a fluorescent lamp, which is shown schematically in a known half-bridge arrangement.
- the transistor T01 of the boost converter is controlled by an integrated circuit Ic01 via a resistor R01 such that a power factor corrector with respect to the mains voltage and the resulting grid current results.
- Integrated circuits that enable power factor correction are widely used in the marketplace. Examples of these are ICB1FL02G from Infineon, or IR2166 and IR1150S from International Rectifier.
- the circuit Ic01 has a feedback input FB to which a voltage proportional to the bus voltage UBUS is supplied. First, this is done by a voltage divider consisting of the resistors R1 and R2, which is connected between the bus voltage UBUS and the reference potential GND. The feedback input FB is connected to the connection point of the resistors R1 and R2. This closes a control loop, which keeps the bus voltage UBUS constant regardless of the mains voltage UN. At the same time, the circuit Ic01 drives the transistor T01 so that the mains current is approximately proportional to the mains voltage.
- the mains voltage UN is an alternating voltage (AC voltage) with a mains frequency of 50-60Hz.
- the mains voltage UN is a DC voltage (DC voltage).
- AC voltage alternating voltage
- DC voltage DC voltage
- the current load of the transistor T01 in DC operation is greater than in AC operation.
- the transistor T01 must therefore be designed for the higher load at DC voltage, which leads to greater component complexity compared to the normal operating case. Therefore, it is advantageous in the circuit arrangement according to FIG. 4 reduces the input power at DC voltage.
- a discriminator stage which is the following Components comprises: the capacitors C10, C11; the diodes D10, D11; the resistors R11, R12.
- the series connection of the capacitor C10 and the resistor R12 is connected in parallel to the rectified mains voltage UGL. Parallel to the resistor R12, the series circuit of the diode D11 and the capacitor C11 is connected. Parallel to capacitor C11, the diode D10 and the resistor R11 are still connected.
- an AC voltage with respect to the reference potential GND is formed at the junction of the capacitor C10 and the resistor R12.
- This AC voltage is rectified by the diode D11 and the capacitor C11 is charged with this rectified voltage.
- On the capacitor C11 is thus a voltage relative to the reference potential GND available, if the mains voltage is an AC voltage.
- the resistor R11 is used to discharge the capacitor C11 in the absence of the AC voltage.
- the diode D10 is a Zener diode and thereby limits the voltage across the capacitor C11 for the protection of further evaluation stages.
- the capacitor C10 In the event that the mains voltage is a DC voltage, in the steady state, the capacitor C10 is charged to the DC voltage. Thus, the voltage across resistor R12 is zero and also the voltage across capacitor C11 is zero.
- the voltage across the capacitor C10 evaluates a switch S10, which in accordance with FIG. 4 is designed as a MOSFET.
- Source of the switch S10 is connected to the reference potential.
- Gate and source form the control input of the switch S10 and are connected to the capacitor C10.
- Drain of the switch S10 is connected via a resistor R10 to the feedback input FB. If the mains voltage UN is now an AC voltage, the switch S10 is turned on by the voltage across the capacitor C11. Thus, the resistor R10 is connected in parallel to the resistor R1.
- the circuit Ic01 controls the transistor T01 so that a higher bus voltage UBUS sets in the AC voltage case than in the DC voltage case.
- the respective absolute values of the bus voltage UBUS can be determined by the selection of the resistors R1, R2 and R10.
- the bus voltage UBUS is lower in the DC voltage case than in the AC voltage case, the power related to the mains voltage is lower in the DC voltage case. This advantageously reduces the load on a battery in the DC voltage case.
- the load of the transistor T01 in the DC voltage case is also advantageously reduced.
- the ratio of the bus voltages in the AC voltage case and DC voltage case can be set so that the load of the transistor T01 is the same in both cases.
- no more load-bearing transistor T01 is required for the DC voltage case.
- the characteristic curve which describes the relationship between the input power PIN of the circuit arrangement and the mains voltage UN is in the exemplary embodiment in each case a constant.
- the input power PIN is lower in the DC voltage case than in the AC voltage case.
- FIG. 5 a further embodiment of a circuit arrangement is shown.
- the difference from the embodiment according to FIG. 4 consists essentially in that the switch S10 off FIG. 4 in FIG. 5 was replaced by a switch S20.
- the switch S20 is now designed as a bipolar transistor. This allows the voltage-limiting Zener diode D10 off FIG. 4 omitted.
- the base of the switch S20 is connected via a current-limiting resistor R24 to the capacitor C11.
- the base of the switch S20 is also connected via a resistor R23 to the reference potential GND. It can thus be adjusted at which voltage value on the capacitor C11 the switch S20 closes.
- an emitter resistor R21 is still inserted to reduce the sensitivity of the switch S20 to noise.
- FIG. 6a shows a diagram of the relationship between mains voltage UN and input power PIN without DC control.
- the input power PIN is constant above the mains voltage UN and for the AC voltage case and the DC voltage case approximately the same.
- FIG. 6b shows a diagram of the relationship between mains voltage UN and power loss PV without feedback in DC operation.
- the power loss PV describes the losses of the transistor T01 from the FIGS. 4 or 5 . It can be clearly seen that the losses in the DC voltage case are approx. 0.1 W higher than in the AC voltage case. Without feedback control in the DC voltage case, the transistor T01 must therefore be designed for the load in the DC voltage case. This is uneconomical, since the DC voltage case rarely occurs in emergency power operation.
- FIG. 6c shows a diagram of the relationship between mains voltage UN and input power PIN with back regulation in DC operation.
- the input power PIN is constant above the mains voltage UN. Different from FIG. 6a For the DC voltage case, the input power PIN is now lowered by approx. 30 W compared to the AC voltage drop.
- FIG. 6d shows a diagram of the relationship between mains voltage UN and power loss PV with back regulation in DC operation.
- the power loss PV describes the losses of the transistor T01 from the FIGS. 4 or 5 ,
- the circumstances are opposite FIG. 6b now vice versa: It can be clearly seen that the losses in the DC voltage case are about 0.1 W lower than in the AC voltage case.
- the transistor T01 can be designed economically for the normal case of the AC voltage.
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Description
Die Erfindung betrifft eine Schaltungsanordnung zur netzspannungsabhängigen Leistungsregelung eines elektronischen Geräts sowie ein Verfahren zur netzspannungsabhängigen Leistungsregelung eines derartigen elektronischen Geräts. Darüber hinaus betrifft die Erfindung ein elektronisches Vorschaltgerät, welches eine Schaltungsanordnung zur netzspannungsabhängigen Leistungsregelung aufweist.The invention relates to a circuit arrangement for mains voltage-dependent power control of an electronic device and a method for mains voltage-dependent power control of such an electronic device. Moreover, the invention relates to an electronic ballast, which has a circuit arrangement for mains voltage-dependent power control.
Zum Betreiben und Einstellen von elektrischen Lampen, insbesondere Leuchtstofflampen, sind elektronische Vorschaltgeräte vorgesehen. Derartige elektronische Vorschaltgeräte sind zwischen einem Netz und der elektrischen Lampe elektrisch geschaltet und begrenzen und regeln einerseits den Lampenstrom und sorgen andererseits für eine sichere Zündung unter den spezifischen Bedingungen. Bei elektronischen Vorschaltgeräten mit Leistungsregelung treten bei einer Netzunterspannung hohe Werte des aufgenommenen Netzeingangstromes auf. Bei einem Gleichstrombetrieb (DC-Betrieb) erhöht sich der aufgenommene Strom nochmals, wobei dies bei einer Energieversorgung durch eine Batterie dazu führt, dass diese Batterie schneller entladen wird bzw. eine kürzere Standzeit aufweist. Darüber hinaus treten an den Eingangsbauteilen während dieses Betriebs auch hohe Belastungen auf. In handelsüblichen leistungsgeregelten elektronischen Vorschaltgeräten wird bei Unterschreitung einer bestimmten Eingangsspannung die Aufnahme der elektrischen Leistung des elektronischen Vorschaltgeräts abgeregelt. Die Dimensionierung der Abregelung und die Auslegung der Bauteile orientiert sich an den im Gleichstrombetrieb stärkeren Belastungen. Im Wechselstrombetrieb (AC-Betrieb) setzt die Abregelung bei gleicher Dimensionierung nachhaltig schon bei höheren Werten der Netzunterspannung ein. Bei aufgeweitetem Arbeitsspannungsbereich (z. B. 220V bis 240VAC) darf die Abregelung aber nicht zu früh erfolgen.For operating and adjusting electric lamps, in particular fluorescent lamps, electronic ballasts are provided. Such electronic ballasts are electrically connected between a network and the electric lamp and limit and regulate the one hand, the lamp current and on the other hand ensure safe ignition under the specific conditions. In the case of electronic ballasts with power control, high values of the recorded mains input current occur in the case of a mains undervoltage. In a DC operation, the absorbed current increases again, which leads to a battery power supply that this battery is discharged faster or has a shorter life. In addition, high loads also occur on the input components during this operation. In commercially available power-controlled electronic ballasts, the recording of the electrical power of the electronic ballast is curtailed when it falls below a certain input voltage. The dimensioning of the down regulation and the design of the components is based on the stronger loads in DC operation. In AC operation (AC operation), the reduction control with the same dimensions is used sustainably even at higher values of the mains undervoltage. However, when the working voltage range is expanded (eg 220V to 240VAC), the reduction may not be too early.
Aufgrund dessen müssen im Gleichstrombetrieb höhere Betriebsströme zugelassen werden. Die langsame Entladung einer möglichen Batterieversorgung bleibt bei dieser Auslegung jedoch unberücksichtigt.Due to this, higher operating currents must be permitted in DC operation. However, the slow discharge of a possible battery supply is disregarded in this interpretation.
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Daher ist es Aufgabe der vorliegenden Erfindung, eine Schaltungsanordnung sowie ein Verfahren zur netzspannungsabhängigen Leistungsregelung eines elektronischen Geräts zu schaffen, mit der bzw. mit dem die aus dem Stand der Technik bekannten Nachteile überwunden werden können. Des Weiteren ist es Aufgabe der vorliegenden Erfindung, ein elektronisches Vorschaltgerät zum Betreiben von elektrischen Lampen zu schaffen, mit dem ebenfalls die oben genannten Nachteile aus dem Stand der Technik überwunden werden können. Die Aufgabe wird durch eine Schaltungsanordnung, welche die Merkmale nach Patentanspruch 1 aufweist, und ein elektronisches Vorschaltgerät, welches die Merkmale nach Patentanspruch 8 aufweist, gelöst. Des Weiteren wird die Aufgabe durch ein Verfahren zur netzspannungsabhängigen Leistungsregelung eines elektronischen Geräts gelöst, welches die Merkmale nach Patentanspruch 10 aufweist.It is therefore an object of the present invention to provide a circuit arrangement and a method for mains voltage-dependent power control of an electronic device with which or with which the disadvantages known from the prior art can be overcome. Furthermore, it is an object of the present invention to provide an electronic ballast for operating electric lamps, with which also the above-mentioned disadvantages of the prior art can be overcome. The object is achieved by a circuit arrangement having the features of
Eine erfindungsgemäße Schaltungsanordnung zur netzspannungsabhängigen Leistungsregelung eines elektronischen Geräts umfasst Mittel, mit denen ein Gleichstrombetrieb oder ein Wechselstrombetrieb des elektronischen Geräts detektierbar ist. Ein weiterer wesentlicher Gedanke der Erfindung ist darin zu sehen, dass die Schaltungsanordnung auch eine Regelungseinheit aufweist, in welcher zumindest eine Kennlinie für einen Gleichstrombetrieb und zumindest eine Kennlinie für einen Wechselstrombetrieb abgelegt ist, wobei die Regelungseinheit derart ausgebildet ist, dass abhängig vom detektierten Betrieb des elektronischen Geräts ein Regeln der vom elektronischen Gerät aufzunehmende elektrische Leistung gemäß der zugeordneten Kennlinie durchführbar ist. Jede der Kennlinien charakterisiert dabei einen Verlauf einer Systemleistung bzw. einer vom elektronischen Gerät aufzunehmenden elektrischen Leistung in Abhängigkeit der Netzspannung. Indem erfindungsgemäß vor dem Regeln detektiert wird, ob ein Gleichstrombetrieb oder ein Wechselstrombetrieb vorliegt, kann eine nachfolgende Regelung der elektrischen Leistungsaufnahme deutlich exakter und präziser durchgeführt werden. Durch das Bereitstellen von speziellen und individuellen Leistung-Netzspannung-Kennlinien für jeden der beiden Betriebsarten kann darüber hinaus nunmehr ermöglicht werden, dass die Netzstromaufnahme des elektronischen Geräts präzise und situationsabhängig geregelt werden kann und somit die Standzeit einer Batterieversorgung deutlich verlängert werden kann. Darüber hinaus kann durch die Erfindung die auftretende Belastung der Eingangsbauteile des elektronischen Geräts wesentlich reduziert werden. Durch die Erfindung kann nun auch verhindert werden, dass eine Abregelung im Wechselstrombetrieb bei gleicher Dimensionierung wie im Gleichstrombetrieb bereits bei höheren Werten der Netzunterspannung einsetzt.A circuit arrangement according to the invention for line voltage-dependent power control of an electronic device comprises means with which a direct current operation or an alternating current operation of the electronic device can be detected. Another essential idea of the invention is to be seen in that the circuit arrangement also has a control unit in which at least one characteristic for a DC operation and at least one characteristic for an AC operation is stored, wherein the control unit is designed such that depending on the detected operation of electronic device, a regulation of the electronic device to be included in the electrical power according to the associated characteristic is feasible. Each of the characteristic curves characterizes a course of a system power or an electrical power to be absorbed by the electronic device as a function of the mains voltage. By detecting according to the invention before regulating whether a DC operation or an AC operation is present, a subsequent regulation of the electrical power consumption can be performed much more accurately and precisely. By providing special and individual power-voltage characteristics for each of the two modes can now also be made possible that the power consumption of the electronic device can be controlled precisely and situation-dependent and thus the life of a battery supply can be significantly extended. In addition, the load of the input components of the electronic device occurring can be substantially reduced by the invention. By the invention can now be prevented that a reduction in AC operation with the same dimensioning as in direct current operation already at higher values of the mains undervoltage.
Die Mittel, mit denen der Betrieb des elektronischen Geräts detektierbar ist, weisen in vorteilhafter Weise eine Diskriminatorstufe auf.The means with which the operation of the electronic device is detectable advantageously comprise a discriminator stage.
Die in der Regelungseinheit abgelegte Kennlinie für Gleichstrombetrieb sowie die abgelegte Kennlinie für Wechselstrombetrieb weisen zumindest teilweise unterschiedliche Kennlinienverläufe auf.The stored in the control unit characteristic for DC operation and the stored characteristic for AC operation have at least partially different characteristics curves.
Die Regelungseinheit ist erfindungsgemäß derart ausgebildet, dass im Falle eines detektierten Gleichstrombetriebs eine Leistungsregelung derart durchgeführt wird, dass die elektrische Leistung bei einem Absinken der Netzspannung bis hin zu einem ersten Netzspannungsschwellwert im Wesentlichen konstant gehalten wird. Des Weiteren ist die Regelungseinheit derart ausgebildet, dass im Falle eines detektierten Gleichstrombetriebs eine Leistungsregelung derart durchgeführt wird, dass die elektrische Leistung bei einem Absinken der Netzspannung unter den ersten Netzspannungsschwellwert kontinuierlich abfallend bis zu einem zweiten Netzspannungsschwellwert abgesenkt wird. In vorteilhafter Weise ist die Regelungseinheit darüber hinaus derart ausgebildet, dass im Falle eines detektierten Gleichstrombetriebs eine Leistungsregelung derart durchgeführt wird, dass bei einem Absinken der Netzspannung unter den zweiten Netzspannungsschwellwert das elektronische Gerät abgeschaltet wird.The control unit according to the invention is designed such that in the case of a detected DC operation, a power control is performed such that the electrical power is kept substantially constant with a drop in the mains voltage up to a first Netzspannungsschwellwert. Furthermore, the control unit is designed such that in the case of a detected DC operation, a power control is carried out such that the electrical power is lowered at a fall in the mains voltage below the first mains voltage threshold continuously decreasing up to a second mains voltage threshold. Advantageously, the control unit is also designed such that in the case of a detected DC operation, a power control is performed such that when a drop in the mains voltage below the second mains voltage threshold, the electronic device is turned off.
Im Hinblick auf ein Abregeln der elektrischen Leistung des elektronischen Geräts im Falle eines Wechselstrombetriebs ist die Regelungseinheit erfindungsgemäß derart ausgebildet, dass im Falle eines derartig detektierten Wechselstrombetriebs eine Leistungsregelung so durchgeführt wird, dass die elektrische Leistung bei einem Absinken der Netzspannung bis zu einem dritten Netzspannungsschwellwert im Wesentlichen konstant gehalten wird und die elektrische Leistung bei einem Absinken der Netzspannung unter den dritten Netzspannungsschwellwert kontinuierlich abfallend bis zu einem vierten Netzspannungsschwellwert abgesenkt wird. Darüber hinaus ist die Regelungseinheit in bevorzugter Weise derart ausgebildet, dass im Falle eines detektierten Wechselstrombetriebs eine Leistungsregelung derart durchgeführt wird, dass bei einem Absinken der Netzspannung unter den vierten Netzspannungsschwellwert das elektronische Gerät ebenfalls abgeschaltet wird.With regard to a Abregeln the electrical power of the electronic device in the case of an AC operation, the control unit according to the invention is designed such that in the case of such a detected AC operation, a power control is performed so that the electric power at a drop in the mains voltage up to a third Netzspannungsschwellwert in Is kept substantially constant and the electrical power is lowered at a fall in the mains voltage below the third Netzspannungsschwellwert continuously decreasing up to a fourth Netzspannungsschwellwert. In addition, the control unit is preferably designed such that in the case of a detected AC operation, a power control is performed such that at a drop in the mains voltage below the fourth mains voltage threshold, the electronic device is also switched off.
Der erste und/oder der zweite Netzspannungsschwellwert und der dritte und/oder der vierte Netzspannungsschwellwert sind in vorteilhafter Weise variabel festlegbar. Darüber hinaus sind in bevorzugter Weise der erste und der dritte Netzspannungsschwellwert sowie der zweite und der vierte Netzspannungsschwellwert gleich. Der kontinuierliche Abfall der elektrischen Leistung zwischen dem ersten und dem zweiten Netzspannungsschwellwert ist in vorteilhafter Weise steiler als der kontinuierliche Abfall der elektrischen Leistung zwischen dem dritten und dem vierten Netzspannungsschwellwert. Durch derartige vorteilhafte Ausführungen kann erreicht werden, dass optimale Regelungen der elektrischen Leistungen Abhängigkeit von der Netzspannung sowohl für den Gleichstrombetrieb als auch für den Wechselstrombetrieb des elektronischen Geräts individuell durchgeführt werden kann. Die derartig vorteilhaft ausgeführten Kennlinien weisen somit im Wesentlichen nur noch zwischen den beiden Netzspannungsschwellwerten einer jeden Kennlinie wesentlich voneinander abweichende Kennlinienverläufe auf.The first and / or the second mains voltage threshold value and the third and / or the fourth mains voltage threshold value can be variably determined in an advantageous manner. In addition, in a preferred manner, the first and third mains voltage threshold and the second and fourth mains voltage thresholds are the same. The continuous drop in electrical power between the first and second grid voltage thresholds is advantageously steeper than the continuous drop in electrical power between the third and fourth grid voltage thresholds. By means of such advantageous embodiments, it can be achieved that optimum regulation of the electrical power depending on the mains voltage can be performed individually both for the DC operation and for the AC operation of the electronic device. The characteristic curves which are carried out in such an advantageous manner thus have substantially different characteristic curves only between the two mains voltage threshold values of each characteristic curve.
In vorteilhafter Weise ist das elektronische Gerät als elektronisches Vorschaltgerät ausgebildet. Insbesondere bei elektronischen Vorschaltgeräten mit einer PFC (Power Factor Correction)-Eingangsstufe kann somit eine netzspannungsabhängige Leistungsregelung in optimierter Weise durchgeführt werden. Insbesondere kann dadurch die elektrische Ausgangsleistung der PFC-Eingangsstufe netzspannungsabhängig geregelt werden.Advantageously, the electronic device is designed as an electronic ballast. In particular, in electronic ballasts with a PFC (Power Factor Correction) input stage thus a mains voltage-dependent power control can be performed in an optimized manner. In particular, the electrical output power of the PFC input stage can be regulated depending on the mains voltage.
Ein weiterer Aspekt der Erfindung betrifft ein elektronisches Vorschaltgerät zum Betreiben von elektrischen Lampen, insbesondere Leuchtstofflampen, welche eine erfindungsgemäße Schaltungsanordnung oder eine vorteilhafte Ausgestaltung der erfindungsgemäßen Schaltungsanordnung aufweist.Another aspect of the invention relates to an electronic ballast for operating electric lamps, in particular fluorescent lamps, which has a circuit arrangement according to the invention or an advantageous embodiment of the circuit arrangement according to the invention.
Bei einem erfindungsgemäßen Verfahren wird eine netzspannungsabhängige Leistungsregelung eines elektronischen Geräts durchgeführt wie sie in Anspruch 10 definiert wird. Das elektronische Gerät umfasst Mittel, mit denen ein Gleichstrombetrieb oder ein Wechselstrombetrieb des elektronischen Geräts detektiert wird und weist darüber hinaus eine Regelungseinheit auf, in welcher zumindest eine Leistung-Netzspannung-Kennlinie für einen Gleichstrombetrieb und zumindest eine Leistung-Netzspannung-Kennlinie für einen Wechselstrombetrieb abgelegt werden, wobei abhängig vom detektierten Betrieb des elektronischen Geräts ein Regeln der vom elektronischen Gerät aufgenommenen elektrischen Leistung gemäß der zugeordneten Kennlinie durch die Regelungseinheit durchgeführt wird. Die Kennlinien charakterisieren dabei eine vom elektronischen Gerät aufzunehmende elektrische Leistung in Abhängigkeit einer Netzspannung.In a method according to the invention, a mains voltage-dependent power control of an electronic device is performed as defined in claim 10. The electronic device comprises means with which a direct current operation or an alternating current operation of the electronic device is detected and moreover has a control unit in which at least one power-mains voltage characteristic for a direct current operation and at least one power mains voltage characteristic for an alternating current operation are stored be, depending on the detected operation of the electronic device, a regulation of the electrical power recorded by the electronic device is performed according to the associated characteristic by the control unit. The characteristic curves characterize an electrical power to be absorbed by the electronic device as a function of a mains voltage.
Weitere vorteilhafte Ausgestaltungen des erfindungsgemäßen Verfahrens sind in den Unteransprüchen angegeben. Darüber hinaus sind auch vorteilhafte Ausgestaltungen der erfindungsgemäßen Schaltungsanordnung als vorteilhafte Ausgestaltungen des erfindungsgemäßen Verfahrens anzusehen.Further advantageous embodiments of the method according to the invention are specified in the subclaims. In addition, advantageous embodiments of the circuit arrangement according to the invention are to be regarded as advantageous embodiments of the method according to the invention.
Im nachfolgenden wird ein Ausführungsbeispiel der vorliegenden Erfindung unter Bezugnahme auf die beigefügten Zeichnungen näher erläutert. Es zeigen:
Figur 1- Kennlinienverläufe einer Systemleistung eines elektronischen Vorschaltgeräts in Abhängigkeit der Netzspannung für einen Gleichstrombetrieb und einen Wechselstrombetrieb des elektronischen Vorschaltgeräts;
Figur 2- eine schematische Blockschaltbilddarstellung einer erfindungsgemäßen Schaltungsanordnung in einem elektronischen Vorschaltgerät;
Figur 3- Kennlinienverläufe einer Systemleistung eines elektronischen Geräts in Abhängigkeit einer Netzspannung für einen Gleichstrombetrieb und einen Wechselstrombetrieb des elektronischen Geräts gemäß der Erfindung;
- Figur 4
- ein Ausführungsbeispiel einer Schaltungsanordnung;
- Figur 5
- ein weiteres Ausführungsbeispiel einer Schaltungsanordnung;
- Figur 6a
- Diagramm zum Zusammenhang zwischen Netzspannung und Eingangsleistung ohne Rückregelung im DC-Betrieb;
- Figur 6b
- Diagramm zum Zusammenhang zwischen Netzspannung und Verlustleistung ohne Rückregelung im DC-Betrieb;
- Figur 6c
- Diagramm zum Zusammenhang zwischen Netzspannung und Eingangsleistung mit Rückregelung im DC-Betrieb;
- Figur 6d
- Diagramm zum Zusammenhang zwischen Netzspannung und Verlustleistung mit Rückregelung im DC-Betrieb.
- FIG. 1
- Characteristic curves of a system performance of an electronic ballast as a function of the mains voltage for a DC operation and an AC operation of the electronic ballast;
- FIG. 2
- a schematic block diagram representation of a circuit arrangement according to the invention in an electronic ballast;
- FIG. 3
- Characteristic curves of a system performance of an electronic device as a function of a mains voltage for a DC operation and an AC operation of the electronic device according to the invention;
- FIG. 4
- an embodiment of a circuit arrangement;
- FIG. 5
- another embodiment of a circuit arrangement;
- FIG. 6a
- Diagram for the relationship between mains voltage and input power without back-regulation in DC operation;
- FIG. 6b
- Diagram for the relationship between mains voltage and power loss without back-regulation in DC operation;
- FIG. 6c
- Diagram for the relationship between mains voltage and input power with back-regulation in DC operation;
- FIG. 6d
- Diagram for the relationship between mains voltage and power loss with feedback control in DC operation.
In
Die Regelungseinheit 32 zeichnet sich gemäß der Erfindung dadurch aus, dass für Wechselstrombetrieb und Gleichstrombetrieb des elektronischen Vorschaltgeräts 3 individuelle unterschiedliche Kennlinien 321 und 322 vorhanden sind, gemäß dieser eine Regelung der elektrischen Systemleistung bzw. die aufzunehmenden elektrischen Leistung des elektronischen Vorschaltgeräts 3 optimiert geregelt werden kann.The
In
Des Weiteren ist in
Es sei angemerkt, dass die Kennlinien 321 und 322 auch gegeneinander verschoben werden können. Dabei ist es auch möglich, dass der erste und der dritte Netzspannungsschwellwert und/oder der zweite und der vierte Netzspannungsschwellwert voneinander abweichen.It should be noted that the
Es kann auch vorgesehen sein, dass im Gleichstrombetrieb bei einem Unterschreiten des ersten Netzspannungsschwellwerts auch direkt auf einen in der Systemleistung deutlich reduzierten Betrieb umgeschaltet wird, in dem beispielsweise sofort auf einen Wert von etwa 60% der Systemleistung abgeregelt wird.It can also be provided that in DC operation, when the first mains voltage threshold value is undershot, the system is also switched directly to a significantly reduced system performance, in which, for example, the system power is immediately reduced to a value of approximately 60%.
Die Busspannung UBUS speist ein elektronisches Vorschaltgerät ECG für eine Leuchtstofflampe, das schematisch in einer bekannten Halbbrückenanordnung dargestellt ist.The bus voltage UBUS feeds an electronic ballast ECG for a fluorescent lamp, which is shown schematically in a known half-bridge arrangement.
Der Transistor T01 des Hochsetzers wird von einem integrierten Schaltkreis Ic01 über einen Widerstand R01 derart gesteuert, dass sich eine Leistungsfaktor-Korrektor bezüglich der Netzspannung und dem resultierendem Netzstrom ergibt. Integrierte Schaltkreise, die eine Leistungsfaktor-Korrektur ermöglichen, sind auf dem Markt weit verbreitet. Beispiele dafür sind ICB1FL02G der Firma Infineon, oder IR2166 und IR1150S der Firma International Rectifier.The transistor T01 of the boost converter is controlled by an integrated circuit Ic01 via a resistor R01 such that a power factor corrector with respect to the mains voltage and the resulting grid current results. Integrated circuits that enable power factor correction are widely used in the marketplace. Examples of these are ICB1FL02G from Infineon, or IR2166 and IR1150S from International Rectifier.
Der Schaltkreis Ic01 besitzt einen Rückkoppel-Eingang FB, dem eine zur Busspannung UBUS proportionale Spannung zugeführt wird. Zunächst geschieht dies durch einen Spannungsteiler bestehend aus den Widerstanden R1 und R2, der zwischen die Busspannung UBUS und das Bezugspotenzial GND geschaltet ist. Der Rückkoppel-Eingang FB ist mit dem Verbindungspunkt der Widerstände R1 und R2 verbunden. Damit schließt sich ein Regelkreis, der die Busspannung UBUS unabhängig von der Netzspannung UN konstant hält. Gleichzeitig steuert der Schaltkreis Ic01 den Transistor T01 so an, dass der Netzstrom näherungsweise proportional zur Netzspannung verläuft.The circuit Ic01 has a feedback input FB to which a voltage proportional to the bus voltage UBUS is supplied. First, this is done by a voltage divider consisting of the resistors R1 and R2, which is connected between the bus voltage UBUS and the reference potential GND. The feedback input FB is connected to the connection point of the resistors R1 and R2. This closes a control loop, which keeps the bus voltage UBUS constant regardless of the mains voltage UN. At the same time, the circuit Ic01 drives the transistor T01 so that the mains current is approximately proportional to the mains voltage.
Im normalen Betriebsfall ist die Netzspannung UN eine Wechselspannung (AC-Spannung) mit einer Netzfrequenz von 50-60Hz. Im Notstromfall ist die Netzspannung UN ein Gleichspannung (DC-Spannung). Bei AC-Spannung liegt eine andere zeitliche Verteilung des E-nergieflusses aus der Netzspannung vor als bei DC-Spannung. Deshalb ist bei gleicher Eingangsleistung die Strombelastung des Transistors T01 im DC-Betrieb größer als im AC-Betrieb. Der Transistor T01 muss deshalb für die höhere Belastung bei DC-Spannung ausgelegt sein, was zu größerem Bauteilaufwand im Vergleich zum normalen Betriebsfall führt. Vorteilhaft wird deshalb in der Schaltungsanordnung gemäß
Im Fall der AC-Spannung entsteht an der Verbindung des Kondensators C10 und dem Widerstand R12 eine Wechselspannung bezüglich dem Bezugspotenzial GND. Diese Wechselspannung wird durch die Diode D11 gleichgerichtet und der Kondensator C11 mit dieser gleichgerichteten Spannung geladen. Am Kondensator C11 steht somit eine Spannung gegenüber der dem Bezugspotenzial GND zur Verfügung, falls die Netzspannung eine AC-Spannung ist. Der Widerstand R11 dient zur Entladung des Kondensators C11 bei Wegfall der AC-Spannung. Die Diode D10 ist eine Zenerdiode und begrenzt dadurch die Spannung am Kondensator C11 zum Schutz weiter Auswertestufen.In the case of the AC voltage, an AC voltage with respect to the reference potential GND is formed at the junction of the capacitor C10 and the resistor R12. This AC voltage is rectified by the diode D11 and the capacitor C11 is charged with this rectified voltage. On the capacitor C11 is thus a voltage relative to the reference potential GND available, if the mains voltage is an AC voltage. The resistor R11 is used to discharge the capacitor C11 in the absence of the AC voltage. The diode D10 is a Zener diode and thereby limits the voltage across the capacitor C11 for the protection of further evaluation stages.
Für den Fall, dass die Netzspannung eine DC-Spannung ist, ist im eingeschwungenen Zustand der Kondensator C10 auf die DC-Spannung aufgeladen. Damit ist die Spannung am Widerstand R12 Null und auch die Spannung am Kondensator C11 Null.In the event that the mains voltage is a DC voltage, in the steady state, the capacitor C10 is charged to the DC voltage. Thus, the voltage across resistor R12 is zero and also the voltage across capacitor C11 is zero.
Die Spannung am Kondensator C10 wertet ein Schalter S10 aus, der gemäß
Ist die Netzspannung UN nun eine DC-Spannung, so ist der Schalter S10 gesperrt, da die Spannung am Kondensator C11 zu Null wird. Damit besteht der Spannungsteiler am Rückkoppel-Eingang FB lediglich aus den Widerständen R1 und R2. Die Spannung am Rückkoppel-Eingang FB ist damit:
Im Fall der DC-Spannung ist damit die Rückkopplung der Busspannung UBUS auf den Rückkoppel-Eingang FB stärker als im AC-Fall. Demgemäß steuert der Schaltkreis Ic01 den Transistor T01 so, dass sich im AC-Spannungs Fall eine höhere Busspannung UBUS einstellt als im DC-Spannungs Fall. Die jeweiligen absoluten Werte der Busspannung UBUS können durch die Wahl der Widerstande R1, R2 und R10 bestimmt werden.In the case of the DC voltage, the feedback of the bus voltage UBUS to the feedback input FB is thus stronger than in the AC case. Accordingly, the circuit Ic01 controls the transistor T01 so that a higher bus voltage UBUS sets in the AC voltage case than in the DC voltage case. The respective absolute values of the bus voltage UBUS can be determined by the selection of the resistors R1, R2 and R10.
Da im DC-Spannungs Fall die Busspannung UBUS geringer ist als im AC-Spannungs Fall, ist die von der Netzspannung bezogene Leistung im DC-Spannungs Fall geringer. Damit ist vorteilhaft die Belastung einer Batterie im DC-Spannungs Fall reduziert. Gleichzeitig ist auch vorteilhaft die Belastung des Transistors T01 im DC-Spannungs Fall reduziert. Das Verhältnis der Busspannungen im AC-Spannungs Fall und DC-Spannungs Fall kann so eingestellt werden, dass die Belastung des Transistors T01 in beiden Fällen gleich ist. Vorteilhaft braucht dann wegen der prinzipiell höheren Belastung im DC-Spannungs Fall kein stärker belastbarer Transistors T01 für den DC-Spannungs Fall eingesetzt werden.Since the bus voltage UBUS is lower in the DC voltage case than in the AC voltage case, the power related to the mains voltage is lower in the DC voltage case. This advantageously reduces the load on a battery in the DC voltage case. At the same time, the load of the transistor T01 in the DC voltage case is also advantageously reduced. The ratio of the bus voltages in the AC voltage case and DC voltage case can be set so that the load of the transistor T01 is the same in both cases. Advantageously, because of the inherently higher load in the DC voltage case, no more load-bearing transistor T01 is required for the DC voltage case.
Die Kennlinie, die den Zusammenhang zwischen Eingangsleistung PIN der Schaltungsanordnung und Netzspannung UN beschreibt, ist im Ausführungsbeispiel jeweils eine Konstante. Die Eingangsleistung PIN ist im DC-Spannungs Fall geringer als im AC-Spannungs Fall.The characteristic curve which describes the relationship between the input power PIN of the circuit arrangement and the mains voltage UN is in the exemplary embodiment in each case a constant. The input power PIN is lower in the DC voltage case than in the AC voltage case.
In
Claims (10)
- Circuit arrangement for system voltage-dependent power regulation of an electronic device (3), wherein the circuit arrangement has means (31) which are designed to detect DC operation or AC operation of the electronic device (3) and wherein the circuit arrangement has a regulating unit (32), in which at least one power/system voltage characteristic (321) for DC operation and at least one power/system voltage characteristic (322) for AC operation of the electronic device (3) are stored, wherein the power/system voltage characteristic (321) for DC operation stored in the regulating unit (32) and the power/system voltage characteristic (322) for AC operation have at least partially different profiles, the regulating unit (32) being designed to carry out regulation of the consumption of the electrical power by the electronic device (3) depending on the detected operation of the electronic device (3) according to the associated power/system voltage characteristic (321, 322), characterized in that
the regulating unit (32) is designed, in the event of DC operation being detected, to keep the electrical power of the electronic device (3) according to the stored power/system voltage characteristic (321) for DC operation essentially constant in the event of the system voltage decreasing down to a first system voltage threshold value, and to the electrical power so as to drop continuously down to a second system voltage threshold value in the event of the system voltage decreasing below the first system voltage threshold value, and in that
the regulating unit (32) is designed, in the event of AC operation being detected, to keep the electrical power of the electronic device (3) according to the stored power/system voltage characteristic (322) for AC operation essentially constant in the event of the system voltage decreasing down to a third system voltage threshold value, and to decrease the electrical power so as to drop continuously down to a fourth system voltage threshold value in the event of the system voltage decreasing below the third system voltage threshold value. - Circuit arrangement according to Claim 1,
characterized in that
the means for detecting the operation of the electronic device (3) have a discriminator stage (31). - Circuit arrangement according to Claim 1,
characterized in that
the regulating unit (32) is designed, in the event of DC operation being detected, to shut down the electronic device (3) according to the stored power/system voltage characteristic (321) for DC operation in the event of the system voltage decreasing below the second system voltage threshold value. - Circuit arrangement according to Claim 1,
characterized in that
the regulating unit (32) is designed, in the event of AC operation being detected, to shut down the electronic device (3) according to the stored power/system voltage characteristic (322) for AC operation in the event of the system voltage decreasing below the fourth system voltage threshold value. - Circuit arrangement according to Claims 3 and 4,
characterized in that
the first and/or the second system voltage threshold value and the third and/or the fourth system voltage threshold value can be determined variably. - Circuit arrangement according to Claims 3 and 4,
characterized in that
the first system voltage threshold value corresponds to the fourth system voltage threshold value, and the third system voltage threshold value corresponds to the fourth system voltage threshold value. - Circuit arrangement according to Claim 6,
characterized in that
the continuous drop in the electrical power between the first and the second system voltage threshold value according to the power/system voltage characteristic (321) for DC operation is steeper than the continuous drop in the electrical power between the third and the fourth system voltage threshold value according to the power/system voltage characteristic (322) for AC operation. - Electronic ballast for operating electric lamps, in particular fluorescent lamps, which has a circuit arrangement according to one of Claims 1 to 7.
- Electronic ballast according to Claim 8,
characterized by
a PFC input stage (33), wherein the circuit arrangement is designed to regulate the electrical output power of the PFC input stage (33) in dependence on the system voltage. - Method for system voltage-dependent power regulation of an electronic device (3), wherein the electronic device has means (31) with which DC operation or AC operation of the electronic device is detected and has a regulating unit (32), in which at least one power/system voltage characteristic (321) for DC operation and at least one power/system voltage characteristic (322) for AC operation of the electronic device (3) are stored, wherein the stored power/system voltage characteristic (321) for DC operation and the stored power/system voltage characteristic (322) for AC operation have at least partially different profiles, regulation of the electrical power to be consumed by the electronic device (3) being carried out by the regulating unit (32) depending on the detected operation of the electronic device (3) and in accordance with the associated power/system voltage characteristic (321, 322),
characterized in that,
in the event of DC operation being detected, power regulation is carried out by the regulating unit (32) such that the electrical power of the electronic device (3) according to the stored power/system voltage characteristic (321) for DC operation is kept essentially constant in the event of the system voltage decreasing down to a first system voltage threshold value, and
in that the electrical power is decreased so as to drop continuously down to a second system voltage threshold value in the event of the system voltage decreasing below the first system voltage threshold value, and
in that, in the event of AC operation being detected, power regulation is carried out by the regulating unit (32) such that the electrical power of the electronic device (3) according to the stored power/system voltage characteristic (322) for AC operation is kept essentially constant in the event of the system voltage decreasing down to a third system voltage threshold value, and
in that the electrical power is decreased so as to drop continuously down to a fourth system voltage threshold value in the event of the system voltage decreasing below the third network voltage threshold value.
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DE102005027015A DE102005027015A1 (en) | 2005-06-10 | 2005-06-10 | Circuit arrangement and method for mains voltage-dependent power control of an electronic device, in particular an electronic ballast |
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DE202012012473U1 (en) | 2012-02-03 | 2013-03-01 | Eckerle Industrie-Elektronik Gmbh | Device for controlling a fluorescent lamp |
EP3651312A1 (en) | 2018-11-12 | 2020-05-13 | polynom ag | Emergency light building block, emergency lighting system and emergency lighting element |
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US5973455A (en) * | 1998-05-15 | 1999-10-26 | Energy Savings, Inc. | Electronic ballast with filament cut-out |
US5936357A (en) * | 1998-07-24 | 1999-08-10 | Energy Savings, Inc. | Electronic ballast that manages switching frequencies for extrinsic purposes |
DE10013279A1 (en) * | 2000-03-17 | 2001-09-27 | Trilux Lenze Gmbh & Co Kg | Monitoring input voltage of electronic voltage adapter for fluorescent lamp involves controlling adapter according to amplitude and/or type of input voltage |
DE10056347A1 (en) * | 2000-11-14 | 2002-05-16 | Bron Elektronik Ag | Monitoring power of film or video lighting unit by varying metal halide lamp power based on value of supply voltage |
US6507157B1 (en) * | 2001-09-25 | 2003-01-14 | Koninklijke Philips Electronics N.V. | Electronic ballast system with dual power and dimming capability |
WO2003039205A1 (en) * | 2001-10-29 | 2003-05-08 | Koninklijke Philips Electronics N.V. | Ballasting circuit |
US6977472B2 (en) * | 2002-06-07 | 2005-12-20 | Matsushita Electric Industrial Co., Ltd. | Electrodeless self-ballasted fluorescent lamp and discharge lamp operating device |
EP1435764A1 (en) * | 2002-06-07 | 2004-07-07 | Matsushita Electric Industrial Co., Ltd. | Electrodeless discharge lamp lighting device, light bulb type electrodeless fluorescent lamp and discharge lamp lighting device |
DE202004004462U1 (en) * | 2004-03-22 | 2004-06-17 | Tridonicatco Gmbh & Co. Kg | Circuitry for operating battery powered gas discharge lamp for emergency illumination, with lamp terminal containing load circuit energized in dependence on control signal dependent on battery charge condition |
-
2005
- 2005-06-10 DE DE102005027015A patent/DE102005027015A1/en not_active Withdrawn
-
2006
- 2006-06-02 EP EP06011520.1A patent/EP1732364B1/en active Active
- 2006-06-09 CN CN2006101060293A patent/CN1893757B/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1271745A1 (en) * | 2001-06-18 | 2003-01-02 | Almat AG | Method for operation of an electric end-user as well as a device using such a method |
Also Published As
Publication number | Publication date |
---|---|
EP1732364A3 (en) | 2011-09-21 |
EP1732364A2 (en) | 2006-12-13 |
CN1893757B (en) | 2013-01-02 |
DE102005027015A1 (en) | 2006-12-14 |
CN1893757A (en) | 2007-01-10 |
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