EP0949851B1 - Ballast for low-pressure discharge lamp - Google Patents
Ballast for low-pressure discharge lamp Download PDFInfo
- Publication number
- EP0949851B1 EP0949851B1 EP99106712A EP99106712A EP0949851B1 EP 0949851 B1 EP0949851 B1 EP 0949851B1 EP 99106712 A EP99106712 A EP 99106712A EP 99106712 A EP99106712 A EP 99106712A EP 0949851 B1 EP0949851 B1 EP 0949851B1
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- EP
- European Patent Office
- Prior art keywords
- circuit
- capacitor
- low
- diode
- circuit arrangement
- Prior art date
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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
- H05B41/288—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 without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
- H05B41/2881—Load circuits; Control thereof
-
- 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
-
- 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
- H05B41/288—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 without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
- H05B41/292—Arrangements for protecting lamps or circuits against abnormal operating conditions
Definitions
- the invention relates to a circuit arrangement for high-frequency operation a low wattage low pressure discharge lamp according to the preamble of claim 1.
- ballasts for lamps larger than 25 W are required DC link capacitors with higher capacities.
- these have result in a high harmonic content, so that active in these lamps Harmonic filter circuits in the form of complex pump circuits with capacitors and diodes required to meet the IEC regulations class C compliance.
- Harmonic filter circuits in the form of complex pump circuits with capacitors and diodes required to meet the IEC regulations class C compliance are e.g. described in DE-OS 36 23 749.
- These active circuits also have additional radio interference, which only requires a lot of components can be prevented.
- the object of the invention is to provide a circuit arrangement for the operation of low wattage low pressure discharge lamps, i.e. less than or equal to 25 W. create that the mains current harmonic content among those in class D the IEC publications holds maximums.
- the one needed for this Circuitry should be as small and inexpensive to implement his.
- the task here was to further simplify the circuit arrangement create, which complies with the specified limits for harmonics and manages with even fewer components.
- the harmonic filter circuit according to the invention consists of only one diode and only one capacitor in addition to the intermediate circuit capacitor ensures safe operation of the half-bridge generator at zero crossing the mains sine voltage.
- the circuit does not work actively like that Pump circuits listed above, but passive, so that this only low radio interference and the expense of components for radio interference suppression can be kept small.
- the circuit also comes with relatively low capacitance values in the DC link. Inexpensive film capacitors can therefore be used as the intermediate circuit capacitor be used.
- Circuit for harmonic filtering results in a high power factor (Ratio of active power to apparent power) greater than or equal to 0.9.
- the harmonic filter circuit consisting of a diode and. is a capacitor Can be realized inexpensively in a small space, as capacities as well Foil capacitors can be used, which also (opposite Electrolytic capacitors) higher "long-term temperature stability" exhibit.
- the harmonic filter circuit also saves the Coupling capacitor in series to the resonance inductance in the series resonance circuit, because the capacitor of the harmonic filter circuit does the job of the coupling capacitor also takes over.
- the block diagram in Figure 1 gives the basic structure of an inventive Circuit arrangement for a low wattage low pressure discharge lamp LP again.
- the circuit arrangement includes a radio interference filter 1, a line rectifier 2 and a half-bridge generator 3 with Control circuit and resonance choke. Between the center tap of the two transistors of the half-bridge generator 3 and the positive pole of the Mains rectifier 2, the low-pressure discharge lamp LP is switched, wherein the preheating circuit 4 is placed parallel to the lamp LP.
- the circuit arrangement additionally has a harmonic filter circuit 5, whereby in the connection of the positive pole of the mains rectifier 2 with the second electrode E2 of the low-pressure discharge lamp LP a diode D1 connected in series and in the DC blocking direction are.
- tap M2 is between diode D1 and the second Electrode E2 via a capacitor C1 with the negative pole of the mains rectifier 2 connected.
- a resistor R9 is also parallel to the diode D1 switched.
- the intermediate circuit capacitor C2 is in this block diagram connected in parallel to the DC output of the mains rectifier.
- FIG. 2 shows a possible variant of the block diagram as shown in FIG. 1 is shown.
- the negative pole of the rectifier 2 via a diode D1 in the direct current blocking direction (related to the positive pole) with the second Electrode E2 of the lamp LP connected.
- the tap M2 between the diode D1 and the second electrode E2 is connected to the capacitor C1 Positive pole of the mains rectifier 2 connected. Is parallel to the diode D1 too here a resistor R9 switched.
- the variant in FIG. 3 essentially corresponds to the block diagram in FIG Figure 1.
- the intermediate circuit capacitor C2 is not parallel to DC output of the mains rectifier 2 but parallel to the diode D1 switched.
- FIG 4 shows the exact circuit diagram of the circuit arrangement according to the invention with harmonic filter circuit for operating a low-pressure discharge lamp LP according to the block diagram in Figure 1.
- a filter choke FD1, FD2 Directly to the Mains input is a filter choke FD1, FD2 and parallel in each supply line A resistor R1 is connected to the filter choke FD1.
- This high frequency filter follows the line rectifier with diodes D3 to D6.
- the self-steering Half-bridge circuit consists of the two transistors T1, T2, the series resistors R3 to R6, the control transformer and the starting generator with the resistors R2, R7, the starting capacitor C4, the diode D7 as well as the Diac DC.
- the control transmitter works on the feedback principle and consists of the primary winding RKA and the two Secondary windings RKB and RKC together.
- the lamp LP is with a Connection of the electrode E1 with the center tap M1 between the two Transistors T1, T2 and with a connection of the other electrode E2 connected to the positive pole of the mains rectifier.
- the capacitor C5 parallel to the switching path of the transistor T1 is used for radio interference suppression (trapezoidal capacitor).
- a PTC thermistor R8 is connected in parallel with the resonance capacitor C6, to improve preheating.
- the additional harmonic filter circuit consists of the diode D1, which in Row and in the DC blocking direction between the positive pole of the mains rectifier and the corresponding connection of the electrode E2 of the low-pressure discharge lamp LP are switched.
- the tap M2 between the Diode D1 and electrode E2 is connected to the negative pole via a capacitor C1 connected to the mains rectifier. It is also parallel to the diode D1 a resistor R9 switched.
- the capacitor C1 is charged via the lamp circuit.
- the charge of the support capacitor C1 is connected to the DC link via the diode D1 conducted and now ensures together with the charge of the intermediate circuit capacitor C2 that even with zero crossing of the AC mains voltage there is a sufficiently high supply voltage for the Keep half-bridge circuit in operation.
- the capacitor C1 acts at the same time So coupling capacitor, so that on its own coupling capacitor can be dispensed with.
- the resistor R9 stabilized in parallel to the diode D1 the vibration behavior of the half-bridge circuit.
- the circuit list below shows the circuit elements used for a circuit arrangement according to FIG. 4 for operating an 8 W fluorescent lamp LP on 230 V AC voltage: FD1, FD2 1.5 mH, BC D3 - D6 Rectifier bridge circuit B250 C800 D1, D7 1N4005 C1 1 ⁇ F C2 0.22 ⁇ F C4 0.1 ⁇ F C5 1.5 nF C6 4.7 nF DC Diac 1N413M R1 10 k ⁇ R2, R7 820 k ⁇ R3, R4 22 ⁇ R5, R6 1 ⁇ R8 PTC thermistor PIC-C1380 R9 270 k ⁇ RKA 9 turns RKB, RKC 3 turns L1 2.4 mH, EF16 T1, T2 BUD620
Description
Die Erfindung betrifft eine Schaltungsanordnung zum hochfrequenten Betrieb
einer niederwattigen Niederdruckentladungslampe gemäß dem Oberbegriff
des Anspruchs 1.The invention relates to a circuit arrangement for high-frequency operation
a low wattage low pressure discharge lamp according to the preamble
of
Der Nachteil dieser Schaltungsanordnung ist, daß durch die Halbbrückenschaltung und dem bei solchen Schaltnetzteilen benötigten Zwischenkreiskondensator Oberschwingungen im Netz erzeugt werden. Dieser Netzstrom-Oberwellengehalt muß gemäß IEC-Publikation 555-2 bei Vorschaltgeräten oder Konvertern größer 25 W Leistungsaufnahme ab 1996 die Klasse C der Vorschriften und bei Kompaktlampen, Vorschaltgeräten und Adapter kleiner gleich 25 W Leistungsaufnahme ab 1998 die Klasse D der Vorschriften erfüllen.The disadvantage of this circuit arrangement is that by the half-bridge circuit and the intermediate circuit capacitor required in such switching power supplies Harmonics are generated in the network. This mains current harmonic content in accordance with IEC publication 555-2 for ballasts or converters larger than 25 W power consumption from 1996 class C of Regulations and smaller for compact lamps, ballasts and adapters 25 W power consumption from 1998 meet class D of the regulations.
Da die Größe des Zwischenkreiskondensators proportional zur Leistungsaufnahme der Lampe ist, benötigen Vorschaltgeräte für Lampen größer 25 W Zwischenkreiskondensatoren mit höheren Kapazitäten. Diese haben jedoch einen hohen Oberwellengehalt zur Folge, so daß bei diesen Lampen aktive Oberwellenfilterschaltungen in Form von aufwendigen Pumpschaltungen mit Kondensatoren und Dioden benötigt werden, um die IEC-Vorschriften der Klasse C erfüllen zu können. Eine solche Schaltungsanordnung wird z.B. in der DE-OS 36 23 749 beschrieben. Diese aktiven Schaltungen haben außerdem zusätzliche Funkstörungen zur Folge, die nur mit einem hohen Bauteileaufwand unterbunden werden können.Because the size of the DC link capacitor is proportional to the power consumption of the lamp, ballasts for lamps larger than 25 W are required DC link capacitors with higher capacities. However, these have result in a high harmonic content, so that active in these lamps Harmonic filter circuits in the form of complex pump circuits with capacitors and diodes required to meet the IEC regulations class C compliance. Such a circuit arrangement is e.g. described in DE-OS 36 23 749. These active circuits also have additional radio interference, which only requires a lot of components can be prevented.
Aufgabe der Erfindung ist es, eine Schaltungsanordnung zum Betrieb von niederwattigen Niederdruckentladungslampen, d.h. kleiner gleich 25 W zu schaffen, die den Netzstromoberwellengehalt unter den in der Klasse D der IEC-Publikationen festgelegten Höchstwerten hält. Der hierfür benötigte Schaltungsaufwand sollte möglichst klein und kostengünstig zu realisieren sein. The object of the invention is to provide a circuit arrangement for the operation of low wattage low pressure discharge lamps, i.e. less than or equal to 25 W. create that the mains current harmonic content among those in class D the IEC publications holds maximums. The one needed for this Circuitry should be as small and inexpensive to implement his.
Aus der DE 44 30 397 ist eine Schaltungsanordnung bekannt, die den Oberwellengehalt unter den in der Klasse D der IEC-Publikationen festgelegten Höchstwert hält und zur Schaffung eines kapazitätsarmen Gleichstrom-Zwischenkreises drei Kapazitäten (mit dem Zwischenkreiskondensator) und zwei Dioden benötigt.From DE 44 30 397 a circuit arrangement is known which contains the harmonic content among those specified in class D of the IEC publications Maximum value holds and to create a low-capacity DC link three capacitances (with the intermediate circuit capacitor) and two diodes needed.
Aufgabe war es hier nun eine weiter vereinfachte Schaltungsanordnung zu schaffen, die die vorgegebenen Grenzwerte für die Oberwellen einhält und mit noch weniger Bauteilen auskommt.The task here was to further simplify the circuit arrangement create, which complies with the specified limits for harmonics and manages with even fewer components.
Die Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1
gelöst. Weitere vorteilhafte Merkmale sind den Unteransprüchen zu entnehmen.The object is achieved by the characterizing features of
Der erfindungsgemäße Oberwellenfilter-Schaltkreis aus lediglich einer Diode und lediglich einem Kondensator zusätzlich zum Zwischenkreiskondensator bewirkt einen sicheren Betrieb des Halbbrückengenerators im Nulldurchgang der Netz-Sinusspannung. Der Schaltkreis arbeitet nicht aktiv wie die oben aufgeführten Pumpschaltungen, sondern passiv, so daß hierdurch nur geringe Funkstörungen entstehen und der Aufwand an Bauteilen zur Funkentstörung klein gehalten werden kann. Der Schaltkreis kommt außerdem mit relativ niedrigen Kapazitätswerten im Gleichstrom-Zwischenkreis aus. Als Zwischenkreiskondensator können daher kostengünstige Folienkondensatoren verwendet werden.The harmonic filter circuit according to the invention consists of only one diode and only one capacitor in addition to the intermediate circuit capacitor ensures safe operation of the half-bridge generator at zero crossing the mains sine voltage. The circuit does not work actively like that Pump circuits listed above, but passive, so that this only low radio interference and the expense of components for radio interference suppression can be kept small. The circuit also comes with relatively low capacitance values in the DC link. Inexpensive film capacitors can therefore be used as the intermediate circuit capacitor be used.
Aufgrund der geringen Ladekapazität des Zwischenkreiskondensators und der erfindungsgemäßen Ankopplung einer Lampenseite an den erfindungsgemäßen Schaltkreis zur Oberwellenfilterung ergibt sich ein hoher Power-Faktor (Verhältnis von Wirkleistung zu Scheinleistung) von größer gleich 0,9.Due to the low charging capacity of the intermediate circuit capacitor and the coupling of a lamp side according to the invention to the invention Circuit for harmonic filtering results in a high power factor (Ratio of active power to apparent power) greater than or equal to 0.9.
Der Oberwellenfilter-Schaltkreis aus einer Diode und. einem Kondensator ist auf kleinem Raum kostengünstig zu realisieren, da als Kapazitäten ebenfalls Folien-Kondensatoren verwendet werden können, die zudem (gegenüber Elektrolyt-Kondensatoren) eine höhere "Temperatur-Langzeit-Stabilität" aufweisen. The harmonic filter circuit consisting of a diode and. is a capacitor Can be realized inexpensively in a small space, as capacities as well Foil capacitors can be used, which also (opposite Electrolytic capacitors) higher "long-term temperature stability" exhibit.
Der Oberwellenfilter-Schaltkreis ermöglicht außerdem die Einsparung des Koppelkondensators in Reihe zur Resonanzinduktivität im Serienresonanzkreis, da der Kondensator des Oberwellenfilter-Schaltkreises die Aufgabe des Koppelkondensators mit übernimmt.The harmonic filter circuit also saves the Coupling capacitor in series to the resonance inductance in the series resonance circuit, because the capacitor of the harmonic filter circuit does the job of the coupling capacitor also takes over.
Die Erfindung ist anhand der nachfolgenden Figuren näher erläutert.
Figur 1- zeigt das Blockschaltbild einer Schaltungsanordnung mit Oberwellenfilter für eine niederwattige Niederdruckentladungslampe
Figur 2- zeigt eine Variante für das Blockschaltbild einer Schaltungsanordnung
gemäß
Figur 1 Figur 3- zeigt eine weitere Variante für das Blockschaltbild einer Schaltungsanordnung
gemäß
Figur 1 Figur 4- zeigt das detaillierte Schaltbild einer Schaltungsanordnung gemäß
Figur 1
- Figure 1
- shows the block diagram of a circuit arrangement with harmonic filter for a low-wattage low-pressure discharge lamp
- Figure 2
- shows a variant for the block diagram of a circuit arrangement according to FIG. 1
- Figure 3
- shows a further variant for the block diagram of a circuit arrangement according to FIG. 1
- Figure 4
- shows the detailed circuit diagram of a circuit arrangement according to FIG. 1
Das Blockschaltbild in Figur 1 gibt den Prinzipaufbau einer erfindungsgemäßen
Schaltungsanordnung für eine niederwattige Niederdruckentladungslampe
LP wieder. Die Schaltungsanordnung beinhaltet ein Funkentstörfilter
1, einen Netzgleichrichter 2 und einen Halbbrückengenerator 3 mit
Ansteuerschaltung und Resonanzdrossel. Zwischen den Mittenabgriff der
beiden Transistoren des Halbbrückengenerators 3 und dem Pluspol des
Netzgleichrichters 2 ist die Niederdruckentladungslampe LP geschaltet, wobei
parallel zur Lampe LP der Vorheizkreis 4 gelegt ist.The block diagram in Figure 1 gives the basic structure of an inventive
Circuit arrangement for a low wattage low pressure discharge lamp
LP again. The circuit arrangement includes a
Erfindungsgemäß weist die Schaltungsanordnung zusätzlich einen Oberwellenfilter-Schaltkreis
5 auf, wobei in die Verbindung des Pluspols des Netzgleichrichters
2 mit der zweiten Elektrode E2 der Niederdruckentladungslampe
LP eine Diode D1 in Reihe und in Gleichstromsperrichtung geschaltet
sind. Außerdem ist der Abgriff M2 zwischen der Diode D1 und die zweite
Elektrode E2 über einen Kondensator C1 mit dem Minuspol des Netzgleichrichters
2 verbunden. Parallel zur Diode D1 ist außerdem ein Widerstand R9
geschaltet. Der Zwischenkreiskondensator C2 ist bei diesem Blockschaltbild
parallel zum Gleichstomausgang des Netzgleichrichters geschaltet.According to the invention, the circuit arrangement additionally has a
Figur 2 zeigt eine mögliche Variante zum Blockschaltbild, wie es in Figur 1
dargestellt ist. Hier ist der Minuspol des Netzgleichrichters 2 über eine Diode
D1 in Gleichstromsperrichtung (bezogen auf den Pluspol) mit der zweiten
Elektrode E2 der Lampe LP verbunden. Der Abgriff M2 zwischen der Diode
D1 und der zweiten Elektrode E2 ist über einen Kondensator C1 mit dem
Pluspol des Netzgleichrichters 2 verbunden. Parallel zur Diode D1 ist auch
hier ein Widerstand R9 geschaltet.FIG. 2 shows a possible variant of the block diagram as shown in FIG. 1
is shown. Here is the negative pole of the
Die Variante in Figur 3 entspricht im wesentlichen dem Blockschaltbild in
Figur 1. Der Zwischenkreiskondensator C2 ist hier jedoch nicht parallel zum
Gleichstromausgang des Netzgleichrichters 2 sondern parallel zur Diode D1
geschaltet.The variant in FIG. 3 essentially corresponds to the block diagram in FIG
Figure 1. However, the intermediate circuit capacitor C2 is not parallel to
DC output of the
Figur 4 zeigt das genaue Schaltbild der erfindungsgemäßen Schaltungsanordnung mit Oberwellenfilter-Schaltkreis zum Betrieb einer Niederdruckentladungslampe LP gemäß dem Blockschaltbild in Figur 1. Direkt an den Netzeingang ist in jede Zuleitung eine Filterdrossel FD1, FD2 sowie parallel zur Filterdrossel FD1 ein Widerstand R1 geschaltet. Diesem Hochfrequenzfilter folgt der Netzgleichrichter mit den Dioden D3 bis D6. Die selbststeuernde Halbbrückenschaltung besteht aus den beiden Transistoren T1, T2, den Vorschaltwiderständen R3 bis R6, dem Steuerübertrager und dem Anlaufgenerator mit den Widerständen R2, R7, dem Startkondensator C4, der Diode D7 sowie dem Diac DC. Der Steuerübertrager arbeitet nach dem Rückkopplungsprinzip und setzt sich aus der Primärwicklung RKA sowie den beiden Sekundärwicklungen RKB und RKC zusammen. Die Lampe LP ist mit einem Anschluß der Elektrode E1 mit dem Mittenabgriff M1 zwischen den beiden Transistoren T1, T2 und mit einem Anschluß der anderen Elektrode E2 mit dem Pluspol des Netzgleichrichters verbunden. Außerdem ist ein Serienresonanzkreis aus Resonanzinduktivität L1 und Resonanzkon-densator C6 vorgesehen, wobei die Resonanzinduktivität L1 zwischen die Primärwicklung RKA des Steuerübertragers und den entsprechenden Anschluß der Elektrode E1 und der Resonanzkondensator C6 zwischen die auf der Heizkreisseite liegenden Anschlüsse der Elektroden E1 und E2 geschaltet sind. Figure 4 shows the exact circuit diagram of the circuit arrangement according to the invention with harmonic filter circuit for operating a low-pressure discharge lamp LP according to the block diagram in Figure 1. Directly to the Mains input is a filter choke FD1, FD2 and parallel in each supply line A resistor R1 is connected to the filter choke FD1. This high frequency filter follows the line rectifier with diodes D3 to D6. The self-steering Half-bridge circuit consists of the two transistors T1, T2, the series resistors R3 to R6, the control transformer and the starting generator with the resistors R2, R7, the starting capacitor C4, the diode D7 as well as the Diac DC. The control transmitter works on the feedback principle and consists of the primary winding RKA and the two Secondary windings RKB and RKC together. The lamp LP is with a Connection of the electrode E1 with the center tap M1 between the two Transistors T1, T2 and with a connection of the other electrode E2 connected to the positive pole of the mains rectifier. There is also a series resonance circuit from resonance inductance L1 and resonance capacitor C6 provided, the resonance inductance L1 between the primary winding RKA of the control transmitter and the corresponding connection of the Electrode E1 and the resonance capacitor C6 between those on the heating circuit side lying connections of the electrodes E1 and E2 are connected.
Parallel zu den Schaltstrecken der Transistoren T1, T2 liegt außerdem ein Zwischenkreiskondensator C2. Der Kondensator C5 parallel zur Schaltstrecke des Transistors T1 dient zur Funkentstörung (Trapezkondensator). Außerdem ist parallel zum Resonanzkondensator C6 ein Kaltleiter R8 geschaltet, um die Vorheizung zu verbessern.There is also a parallel to the switching paths of the transistors T1, T2 DC link capacitor C2. The capacitor C5 parallel to the switching path of the transistor T1 is used for radio interference suppression (trapezoidal capacitor). In addition, a PTC thermistor R8 is connected in parallel with the resonance capacitor C6, to improve preheating.
Die Funktionsweise einer solchen Schaltungsanordnung mit Halbbrückenschaltung und Serienresonanzkreis zum Zünden und Betrieb einer Niederdruckentladungslampe kann dem Buch "Elektronikschaltungen" von W. Hirschmann (SIEMENS AG) 1982, Seite 148, entnommen werden und soll hier nicht näher ausgeführt werden.The functioning of such a circuit arrangement with half-bridge circuit and series resonance circuit for igniting and operating a low-pressure discharge lamp can the book "Electronics Circuits" by W. Hirschmann (SIEMENS AG) 1982, page 148, and should be taken not explained in more detail here.
Der zusätzliche Oberwellenfilter-Schaltkreis besteht aus der Diode D1, die in Reihe und in Gleichstromsperrichtung zwischen den Pluspol des Netzgleichrichters und den entsprechenden Anschluß der Elektrode E2 der Niederdruckentladungslampe LP geschaltet sind. Der Abgriff M2 zwischen der Diode D1 und der Elektrode E2 ist über einen Kondensator C1 mit dem Minuspol des Netzgleichrichters verbunden. Außerdem ist parallel zu der Diode D1 ein Widerstand R9 geschaltet.The additional harmonic filter circuit consists of the diode D1, which in Row and in the DC blocking direction between the positive pole of the mains rectifier and the corresponding connection of the electrode E2 of the low-pressure discharge lamp LP are switched. The tap M2 between the Diode D1 and electrode E2 is connected to the negative pole via a capacitor C1 connected to the mains rectifier. It is also parallel to the diode D1 a resistor R9 switched.
Die Kondensator C1 wird über den Lampenstromkreis geladen. Die Ladung des Stützkondensators C1 wird über die Diode D1 auf den Gleichstrom-Zwischenkreis geleitet und sorgt nun zusammen mit der Ladung des Zwischenkreiskondensators C2 dafür, daß auch bei Nulldurchgang der Netzwechselspannung eine ausreichend hohe Versorgungsspannung vorliegt, um die Halbbrückenschaltung in Betrieb zu halten. Der Kondensator C1 wirkt zugleich also Koppelkondensator, so daß auf einen eigenen Koppelkondensator verzichtet werden kann. Der Widerstand R9 parallel zur Diode D1 stabilisiert das Schwingverhalten der Halbbrückenschaltung.The capacitor C1 is charged via the lamp circuit. The charge of the support capacitor C1 is connected to the DC link via the diode D1 conducted and now ensures together with the charge of the intermediate circuit capacitor C2 that even with zero crossing of the AC mains voltage there is a sufficiently high supply voltage for the Keep half-bridge circuit in operation. The capacitor C1 acts at the same time So coupling capacitor, so that on its own coupling capacitor can be dispensed with. The resistor R9 stabilized in parallel to the diode D1 the vibration behavior of the half-bridge circuit.
In der nachfolgenden Bestückungsliste sind die verwendeten Schaltungselemente
für eine Schaltungsanordnung gemäß Figur 4 zum Betrieb einer 8 W-Leuchtstofflampe
LP an 230 V-Wechselspannung zusammengestellt:
Claims (4)
- Circuit arrangement for the high-frequency operation of a low-power low-pressure discharge lamp (LP) from an AC voltage source, the circuit arrangement having the following features:characterized in thata mains rectifier (2) with a downstream DC link capacitor (C2),a half-bridge circuit which is connected to the DC output of the mains rectifier (2) and has two alternately switching transistors (T1,T2) and a drive circuit, a centre tap (M1) being provided between the two transistors (T1,T2),a series resonant circuit which is assigned to the low-pressure discharge lamp (LP) and comprises a resonance inductor (L1) and a resonance capacitor (C6),connecting lines for the low-pressure discharge lamp (LP), a line connecting the first electrode (E1) of the lamp (LP) via the resonance inductor (L1) to the centre tap (M1) between the two transistors (T1,T2), and in each case a further line connecting the second electrode (E2) of the lamp (LP) to the positive or negative pole of the mains rectifier (2),a diode (D1) is connected in series and in the DC non-conducting direction in the connecting line between the second electrode (E2) of the lamp (LP) and the positive or negative pole of the mains rectifier (2), and the tap (M2) between the diode (D1) and the second electrode (E2) is connected via a capacitor (C1) to the other pole of the mains rectifier (2).
- Circuit arrangement according to Claim 1, characterized in that a resistor (R9) is connected in parallel with the diode (D1).
- Circuit arrangement according to Claim 1, characterized in that the DC link capacitor (C2) is connected in parallel with the DC output of the mains rectifier (2).
- The circuit arrangement according to Claim 1, characterized in that the DC link capacitor (C2) is connected in parallel with the diode (D1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19815623 | 1998-04-07 | ||
| DE19815623A DE19815623A1 (en) | 1998-04-07 | 1998-04-07 | Circuit arrangement for operating low-pressure discharge lamps |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0949851A1 EP0949851A1 (en) | 1999-10-13 |
| EP0949851B1 true EP0949851B1 (en) | 2001-10-17 |
Family
ID=7863906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99106712A Expired - Lifetime EP0949851B1 (en) | 1998-04-07 | 1999-04-01 | Ballast for low-pressure discharge lamp |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6104142A (en) |
| EP (1) | EP0949851B1 (en) |
| KR (1) | KR100607394B1 (en) |
| CA (1) | CA2267918C (en) |
| DE (2) | DE19815623A1 (en) |
| ES (1) | ES2166203T3 (en) |
| TW (1) | TW461229B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6356034B1 (en) * | 2000-03-22 | 2002-03-12 | Regal King Manufacturing Limited | Low voltage discharge lamp power supply |
| DE10160790A1 (en) * | 2001-01-12 | 2002-08-08 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Circuit for switching on sub-circuitry, e.g. for lamp starter circuit, has additional diode connected in series and in same orientation as two diodes |
| US10360043B2 (en) * | 2015-07-20 | 2019-07-23 | Dell Products, Lp | Installation of device drivers from virtual media |
| CN110098631A (en) * | 2018-01-31 | 2019-08-06 | 新疆金风科技股份有限公司 | DC transmission system and its discharging circuit and unloading method |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4675576A (en) * | 1985-04-05 | 1987-06-23 | Nilssen Ole K | High-reliability high-efficiency electronic ballast |
| DE3623749A1 (en) * | 1986-07-14 | 1988-01-21 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | CIRCUIT ARRANGEMENT FOR OPERATING LOW-PRESSURE DISCHARGE LAMPS |
| BR9006877A (en) * | 1989-08-04 | 1991-08-06 | Henri Edouard Francois Marie C | FEEDING DEVICE FOR CONVERTERS, HARMONIC DISTORTION FREE |
| WO1991016802A1 (en) * | 1990-04-26 | 1991-10-31 | Smallwood Robert C | Electronic lamp ballast for gas discharge lamp |
| DE4140557A1 (en) * | 1991-12-09 | 1993-06-17 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | CIRCUIT ARRANGEMENT FOR OPERATING ONE OR MORE LOW-PRESSURE DISCHARGE LAMPS |
| DE4238409A1 (en) * | 1992-11-13 | 1994-05-19 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Circuit arrangement for operating low-pressure discharge lamps |
| DE4430397A1 (en) * | 1994-08-26 | 1996-02-29 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Circuit arrangement for operating low-pressure discharge lamps |
| US5574336A (en) * | 1995-03-28 | 1996-11-12 | Motorola, Inc. | Flourescent lamp circuit employing a reset transistor coupled to a start-up circuit that in turn controls a control circuit |
| US5898278A (en) * | 1995-08-09 | 1999-04-27 | Pinbeam Ag | Series resonant lamp circuit having direct electrode connection between rectifier and AC source |
| US5801492A (en) * | 1996-05-30 | 1998-09-01 | Bobel; Andrzej | Electronic ballast for gas discharge lamp having primary and auxiliary resonant circuits |
| US5994847A (en) * | 1997-01-31 | 1999-11-30 | Motorola Inc. | Electronic ballast with lamp current valley-fill power factor correction |
-
1998
- 1998-04-07 DE DE19815623A patent/DE19815623A1/en not_active Withdrawn
-
1999
- 1999-03-15 KR KR1019990008562A patent/KR100607394B1/en not_active IP Right Cessation
- 1999-03-26 TW TW088104823A patent/TW461229B/en not_active IP Right Cessation
- 1999-04-01 ES ES99106712T patent/ES2166203T3/en not_active Expired - Lifetime
- 1999-04-01 EP EP99106712A patent/EP0949851B1/en not_active Expired - Lifetime
- 1999-04-01 DE DE59900311T patent/DE59900311D1/en not_active Expired - Lifetime
- 1999-04-02 US US09/285,540 patent/US6104142A/en not_active Expired - Lifetime
- 1999-04-06 CA CA002267918A patent/CA2267918C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR100607394B1 (en) | 2006-08-02 |
| CA2267918C (en) | 2005-11-22 |
| US6104142A (en) | 2000-08-15 |
| KR19990082734A (en) | 1999-11-25 |
| CA2267918A1 (en) | 1999-10-07 |
| DE59900311D1 (en) | 2001-11-22 |
| EP0949851A1 (en) | 1999-10-13 |
| TW461229B (en) | 2001-10-21 |
| DE19815623A1 (en) | 1999-10-14 |
| ES2166203T3 (en) | 2002-04-01 |
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