EP1286572A2 - Vorschaltgerät zum Betrieb mindestens einer Niederdruckentladungslampe - Google Patents
Vorschaltgerät zum Betrieb mindestens einer Niederdruckentladungslampe Download PDFInfo
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- EP1286572A2 EP1286572A2 EP02011284A EP02011284A EP1286572A2 EP 1286572 A2 EP1286572 A2 EP 1286572A2 EP 02011284 A EP02011284 A EP 02011284A EP 02011284 A EP02011284 A EP 02011284A EP 1286572 A2 EP1286572 A2 EP 1286572A2
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- Prior art keywords
- low
- pressure discharge
- transformer
- ballast
- winding
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- 238000004804 winding Methods 0.000 claims abstract description 130
- 239000003990 capacitor Substances 0.000 claims description 34
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000003071 parasitic effect Effects 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 210000002414 leg Anatomy 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000000689 upper leg Anatomy 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
- H05B41/2825—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 by means of a bridge converter in the final stage
- H05B41/2827—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 by means of a bridge converter in the final stage using specially adapted components in the load circuit, e.g. feed-back transformers, piezoelectric transformers; using specially adapted load circuit configurations
Definitions
- the invention relates to a ballast for operating at least one low-pressure discharge lamp according to the preamble of claims 1, 2 or 4 or according to claim 7.
- US Pat. No. 4,392,085 describes a ballast for operating two in parallel switched low-pressure discharge lamps on a half-bridge inverter disclosed.
- the ballast has a transformer with two of the same type Windings, which are each connected in one of the two lamp current branches. This transformer works as a differential current transformer. Ignites one of the two Lamps earlier than the other, so the ignition is turned on with the help of the transformer the other lamp supports.
- Ballasts for operating several low-pressure discharge lamps occur frequently the problem arises that the lamps have different brightness when dimmed to shine.
- this problem can be caused by different currents in the current branches be caused.
- this problem also occurs with lamps, which - as with a series connection of two lamps ⁇ in the same branch are arranged.
- the ballast has an inverter, the with a downstream load circuit designed as a resonant circuit is provided, in which the lamps are switched, those lamps light up are directly connected to the resonant circuit components, often brighter than that downstream lamps.
- the two ends of only one low-pressure discharge lamp in each current branch the lamp shine differently bright.
- This variant of the invention is particularly good for the operation of three connected in parallel Suitable for low pressure discharge lamps. It is characterized by a special simple wiring of the luminaire.
- the two transformers work due to the opposite arrangement of their first and second windings, respectively like a differential current transformer. Due to the special turns ratio of 2: 1 between the first and second winding on both transformers is guaranteed that all three current branches are symmetrical because the second Windings of the two transformers from the partial currents of two current branches be flowed through.
- the special arrangement of the windings Both transformers ensure that, on the one hand, the currents in the three current branches Be symmetrized and on the other hand also the losses due to parasitic Capacities in each individual current branch or in each individual lamp are compensated become. Therefore, all three lamps shine equally even with strong dimming bright.
- the ballast has three in parallel switched current branches, in each of which electrical connections for at least one Low pressure discharge lamp are switched.
- this ballast has a transformer with three identically constructed and isotropically arranged windings on, which are each arranged in one of the current branches so that they are in the same direction through which the lamp current flows.
- isotropic means that the transformer with a three-legged core and three identical Windings is equipped, with one winding arranged on each leg is. These windings are arranged in the current branches in such a way that lamp current flows through them in the same direction.
- the ballast is advantageously with a second Equipped transformer for balancing the lamp current, the both windings of this second transformer have the same number of turns and connected in front of and behind the parallel connection of the three current branches are, so that the windings flow in opposite directions from the total current of the current branches become. This measure ensures that all lamps in are arranged in the same branch of electricity, shine equally brightly.
- Both transformers act as differential current transformers.
- the first transformer ensures symmetrization of the currents in the two connected in parallel Current branches, while the second transformer balancing of the total current in front of and behind the parallel connection of the current branches.
- the first transformer ensures that the lamps are in the two branches shine equally brightly, while the second transformer ensures that those in the same Lamps arranged in a current branch - that is to say the lamps connected in series of each branch of electricity - shine equally brightly.
- the second transformer compensates the losses caused by parasitic capacities. He symmetrizes in his Seek equal currents to flow in its windings through parasitic ones Capacities caused leakage currents.
- This ballast is therefore particularly suitable for operating four low-pressure discharge lamps, those in two parallel current branches, each with a series connection are arranged from two low-pressure discharge lamps.
- This variant of the ballast but is also suitable for operating a different number of Low-pressure discharge lamps in the two branches connected in parallel. For example, it is possible to have two series connected in the first current branch Arrange low-pressure discharge lamps and only one in the second current branch Low pressure discharge lamp to operate.
- the ballast has electrical Connections for a single low pressure discharge lamp or electrical connections for several low-pressure discharge lamps connected in series. Moreover this ballast has a transformer with two windings of the same number of turns with the first winding when the low-pressure discharge lamp is connected or with connected low-pressure discharge lamps - the low-pressure discharge lamp or the series connection of the low-pressure discharge lamps is immediately upstream, and the second winding of the low-pressure discharge lamp or the series connection of the low-pressure discharge lamps directly is connected downstream, so that the windings of the transformer in opposite directions from Through the lamp current.
- Windings ensure that the two ends of the on the ballast operated low-pressure discharge lamp appear equally bright even with strong dimming, or that with a series connection of several low-pressure discharge lamps, the low-pressure discharge lamps connected in series shine equally brightly.
- the windings of the transformer force the current into symmetry the supply lines, directly in front of and behind the low-pressure discharge lamp, or immediately before and after the series connection of the low-pressure discharge lamps.
- the losses due to parasitic capacitance in the lamps are calculated using the transformer compensated.
- the ballast according to the invention is advantageously an inverter a downstream load circuit is formed, the electrical connections for the low-pressure discharge lamps or the current branches with the electrical ones Connections for at least one low-pressure charge lamp arranged in the load circuit are to operate the lamps with a high frequency alternating current can. Operation of the lamps with a high frequency alternating current improved the luminous efficacy and enables simple brightness control of the lamps by changing the AC frequency.
- the downstream Load circuit is designed as a series resonance circuit.
- the formation of the load circuit as Series resonance circuit enables simple ignition of the low-pressure discharge lamps using the method of increasing the resonance.
- the ballast has a half-bridge inverter, which essentially consists of transistors T1, T2 and a (not shown) Control device for the transistors T1, T2 and from the half-bridge capacitor C2 exists.
- the half-bridge inverter T1, T2 is connected to its Voltage inputs are supplied with a DC voltage U in a known manner is generated by filtering and rectification from the AC mains voltage.
- the filter and rectifier circuit of the ballast are therefore in the figures not shown and shall not be described further here.
- To the Center tap M1 between the transistors T1, T2 of the half-bridge inverter the inductance L1 is connected.
- the first connection is to the inductance L1 of capacitor C1 connected while the second connection of the capacitor C1 is connected to ground potential.
- the inductor L1 and the capacitor C1 form a series resonance circuit.
- the first port of the resonance capacitor C1 is via a parallel connection of several low pressure discharge lamps or a series connection of low pressure discharge lamps or a combination of both connected to the first terminal of the half-bridge capacitor C2.
- the second connection of the half-bridge capacitor C2 is at ground potential.
- To the Half-bridge capacitor C2 is half the supply voltage U of the half-bridge inverter on.
- the transistors T1, T2 are activated by the control device alternating in a known manner with a frequency of more than 20 kHz switched, so that the center tap M1 alternates with the ground potential and the positive potential U is connected. Between the center tap M1 and the second terminal of the half-bridge capacitor C2 therefore flows accordingly high-frequency alternating current with which the low-pressure discharge lamps operate.
- the ballast is used for Operation of low-pressure discharge lamps, in particular fluorescent lamps, the each with two heatable electrode coils to generate a gas discharge are provided.
- Each electrode coil has two electrical connections, via which the electrode coil by means of a heater (not shown) H in can be acted upon in a known manner with a heating current in order to protect it To enable lamp operation.
- Figures 1 to 8 are the electrical Connections of the electrode filaments or the low-pressure discharge lamps that are connected of the heating device H are correspondingly provided with the reference symbol H. Since the heater H is known and none for the present invention Role, it is not further explained here. So far all eight exemplary embodiments are correct match.
- the ballast is used for Operation of three low-pressure discharge lamps connected in parallel, in particular Fluorescent lamps L10, L11, L12.
- the circuit arrangement is this Ballast shown schematically.
- To the first connection of the resonance capacitor C1 and the first connection of the half-bridge capacitor C2 are three Current branches connected in parallel, each with a low-pressure discharge lamp L10 or L11 or L12 is switched.
- this ballast has two transformers Tr10, Tr11, each with two windings 10a, 10b, 11a, 11b.
- the turns ratio of the windings 10a, 10b of the first transformer Tr10 is 2: 1.
- the turns ratio of the windings is also the same 11a, 11b of the second transformer Tr11 2: 1.
- the winding 10a of the transformer Tr10 is connected to the first current path, in series with the L10 fluorescent lamp.
- the second winding 10b of the transformer Tr10 is both in the second Current path, in series with the fluorescent lamp L11, as well as in the third current path, connected in series to the L12 fluorescent lamp.
- the winding 10a is therefore from the Discharge current flows through the fluorescent lamp L10 while the winding 1Ob is flowed through by the discharge currents of the fluorescent lamps L11 and L12.
- the two windings 10a, 10b are wound in opposite directions, so that they are in opposite directions through which the discharge current of the lamps flows.
- the first is analogous to this Winding 11a of the transformer Tr11 in the third current path, in series to Fluorescent lamp L12 switched while the second winding 11b both in the first current path, in series with the fluorescent lamp L10, as well as in the second current path, in series with the fluorescent lamp L11.
- the winding 11a is therefore flowed through the discharge current of the fluorescent lamp L12, while the Winding 11b from the discharge currents of the fluorescent lamps L10 and L11 is flowed through.
- the windings 11a, 11b are arranged in opposite directions, so that the discharge currents or lamp currents flow through them in opposite directions.
- the first transformer Tr10 is the fluorescent lamps L10 to L12 directly connected upstream, while the second transformer Tr11 the fluorescent lamps L10 to L12 is immediately connected. So all three current paths are perfect symmetrical.
- the two transformers Tr10, Tr11 each work as differential current transformers and ensure that regardless of the Dimming level all three lamps shine equally brightly.
- the ballast is used for the operation of three low-pressure discharge lamps connected in parallel, in particular Fluorescent lamps L20, L21, L22.
- the circuit arrangement is this Ballast shown schematically.
- To the first connection of the resonance capacitor C1 and to the first terminal of the half-bridge capacitor C2 three current branches connected in parallel, each with a low-pressure discharge lamp L20 or L21 or L22 is switched.
- This also points Ballast a transformer Tr2 with three identically constructed and isotropic arranged windings 2a, 2b, 2c.
- each of the three connected in parallel Current display is one of the fluorescent lamps L20 or L21 or L22 and in series for Discharge path of the corresponding fluorescent lamp L20 or L21 or L22 one of the windings 2a or 2b or 2c switched.
- the windings 2a, 2b, 2c of the Transformers Tr2 are arranged in the respective current branch in such a way that they through which the discharge currents of the lamps flow.
- the ballast is used for Operation of six low-pressure discharge lamps, especially fluorescent lamps L30, L31, L32, L33, L34, L35.
- Figure 3 is the circuit arrangement of this ballast shown schematically.
- the ballast also has a transformer Tr30 three identical and isotropically arranged windings 30a, 30b, 30c.
- the ballast has a second transformer Tr31 with two identical ones Windings 31a, 31b.
- the first winding 31a is immediately before that of the three Current branches existing parallel connection of the lamps and the second winding 31b is immediately behind the parallel connection consisting of the three current branches of the lamps arranged in such a way that the two windings 31a, 31b the total current of the three current branches flows in opposite directions.
- the ballast is used for Operation of four low-pressure discharge lamps, in particular fluorescent lamps L40, L41, L42, L43.
- Figure 4 is the circuit arrangement of this ballast shown schematically.
- the ballast has a transformer Tr40 with two windings 40a, 40b same number of turns.
- the first winding 40a is in series in the first current branch connected to the series connection of the low-pressure discharge lamps L40 and L41.
- the second winding 40b is in the second current branch, in series with the series connection of the low-pressure discharge lamps L42 and L43.
- the two Windings 40a, 40b are arranged in the current branches in such a way that they are in opposite directions of the discharge currents of the lamps or the partial currents in the current branches be flowed through.
- the transformer Tr40 acts as a differential current transformer and ensures symmetry of the partial flows in the two connected in parallel Current branches.
- the ballast also has a second transformer Tr41 with two windings 41a, 41b of the same number of turns.
- the first winding 41a is immediately before the parallel connection of the two current branches and the second Winding 41b is immediately after the parallel connection of the two current branches arranged so that the two windings 41a, 41b in opposite directions from the total current of the two current branches connected in parallel.
- the second Transformer Tr41 also works as a residual current transformer. He enforces symmetrization of the total current immediately before and after the parallel connection of the two branches. The losses from parasitic capacities are thereby compensated so that the lamps L41 and L43 do the same, even with strong dimming shine brightly like the lamps L40 and L42.
- the ballast is used for operating three low-pressure discharge lamps, in particular fluorescent lamps L50, L51, L52.
- Figure 5 is the circuit arrangement of this ballast shown schematically.
- the ballast has one Transformer Tr50 with two windings 50a, 50b of the same number of turns.
- the first Winding 50a is in the first branch, in series with the series connection of the low-pressure discharge lamps L50 and L51 switched.
- the second winding 50b is in the second current branch, connected in series with the low-pressure discharge lamp L52.
- the two windings 50a, 50b are arranged in the current branches in such a way that they flow in opposite directions from the partial flows in the current branches.
- the Transformer Tr50 acts as a residual current transformer and ensures one Balancing the partial currents in the two current branches connected in parallel.
- the ballast also has a second transformer Tr51 with two windings 51a, 51b the same number of turns.
- the first winding 51a is immediately before the parallel connection of the two current branches and the second winding 51b is immediate arranged after the parallel connection of the two current branches, so that the two windings 51a, 51b in opposite directions from the total current of the two in parallel switched current branches are flowed through.
- the second transformer Tr51 works also as a differential current transformer. It forces symmetrization of the total current immediately before and after the parallel connection of the two current branches.
- the ballast is used for operating two low-pressure discharge lamps, in particular fluorescent lamps L60, L61.
- the circuit arrangement of this ballast is schematic displayed.
- the ballast also has a transformer Tr60 with two windings 60a, 60b of the same number of turns.
- the first winding 60a is in the first branch, in series the discharge path of the low-pressure discharge lamp L60 switched.
- the second winding 60b is in the second current branch, connected in series to the discharge path of the low-pressure discharge lamp L61.
- the two windings 60a, 60b are arranged in the current branches that they are in opposite directions from the discharge currents of the lamps or the partial currents in flow through the branches.
- the transformer Tr60 acts as a residual current transformer and ensures a symmetrization of the partial flows in the two current branches connected in parallel.
- the ballast also has one second transformer Tr61 with two windings 61a, 61b of the same number of turns. The first winding 61a is immediately before the parallel connection of the two current branches and the second winding 61b is immediately after the parallel connection two current branches arranged so that the two windings 61a, 61b in opposite directions flowed through by the total current of the two current branches connected in parallel become.
- the second transformer Tr61 also works as a differential current transformer. It immediately forces a balancing of the total current and behind the parallel connection of the two current branches. The losses from parasitic Capacities are compensated for, so the two ends of the lamps L60 and L61 shine equally bright even with strong dimming.
- the ballast is used for Operation of two low-pressure discharge lamps connected in series, in particular Fluorescent lamps L70, L71.
- Figure 7 is the circuit arrangement of this ballast shown schematically.
- the ballast also has a transformer Tr7 with two windings 7a, 7b same number of turns. Both windings 7a, 7b are in series with the series connection the lamps L70, L71 switched so that they are in opposite directions from the lamp current be flowed through.
- the first winding 8a is immediately before the series connection the lamps L70, L71 and the second winding 7b immediately behind the Series connection of lamps L70, L71 in the load circuit of the half-bridge inverter T1, T2 switched.
- the transformer Tr7 works as a differential current transformer. It compensates for the losses caused by parasitic capacities.
- the ballast is used for Operation of a low-pressure discharge lamp, in particular fluorescent lamp L8.
- FIG. 8 shows the circuit arrangement of this ballast schematically.
- the discharge path of the lamp L8 is between the first connection of the resonance capacitor C1 and at the first terminal of the half-bridge capacitor C2 switched into the load circuit of the half-bridge inverter.
- the ballast has also a transformer Tr8 with two windings 8a, 8b of the same number of turns. Both windings 8a, 8b are in series with the discharge path of the Lamp L8 switched so that the lamp current flows in opposite directions become.
- the first winding 8a is immediately before the discharge path of the lamp L8 and the second winding 8b immediately behind the discharge path of the lamp L8 connected to the load circuit of the half-bridge inverter T1, T2.
- the transformer Tr8 works as a differential current transformer. It compensates for the losses through parasitic capacitance and which ensures that both ends of the Fluorescent lamp L8 shine equally bright even with strong dimming.
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- Circuit Arrangements For Discharge Lamps (AREA)
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Abstract
Description
- einen Transformator zur Symmetrierung der Lampenströme, wobei der Transformator eine erste und eine zweite Wicklung besitzt, und wobei die erste Wicklung doppelt so viele Windungen wie die zweite Wicklung besitzt,
- einen zweiten Transformator zur Symmetrierung der Lampenströme, wobei der zweite Transformator eine erste und eine zweite Wicklung besitzt und die erste Wicklung doppelt so viele Windungen wie die zweite Wicklung besitzt, wobei
- die Wicklungen der Transformatoren derart angeordnet sind, dass bei angeschlossenen Niederdruckentladungslampen, die Lampenströme zuerst durch die Wicklungen eines der beiden Transformatoren, dann durch die Niederdruckentladungslampen und anschließend erst durch die Wicklungen des anderen Transformators fließen, wobei
- die erste Wicklung des ersten Transformators derart angeordnet ist, dass sie bei angeschlossenen Niederdruckentladungslampen von dem Lampenstrom der in den ersten Stromzweig geschalteten Niederdruckentladungslampe bzw. Niederdruckentladungslampen durchflossen wird, wobei
- die zweite Wicklung des ersten Transformators derart angeordnet ist, dass sie bei angeschlossenen Niederdruckentladungslampen von den Lampenströmen der in den zweiten und dritten Stromzweig geschalteten Niederdruckentladungslampen durchllossen wird, und wobei die beiden Wicklungen des ersten Transformators gegensinnig gewickelt sind, wobei
- die erste Wicklung des zweiten Transformators derart angeordnet ist, dass sie bei angeschlossenen Niederdruckentladungslampen von dem Lampenstrom der in den dritten Stromzweig geschalteten Niederdruckentladungslampe bzw. Niederdruckentladungslampen durchflossen wird, und wobei
- die zweite Wicklung des zweiten Transformators derart angeordnet ist, dass sie bei angeschlossenen Niederdruckentladungslampen von den Lampenströmen der in den ersten und zweiten Stromzweig geschalteten Niederdruckentladungslampen durchflossen wird, wobei die beiden Wicklungen des zweiten Transformators gegensinnig gewickelt sind.
- einen Transformator zur Symmetrierung der Lampenströme,
- zwei parallel geschaltete Stromzweige, in die jeweils elektrische Anschlüsse für mindestens eine Niederdruckentladungslampe geschaltet sind, wobei
- der Transformator eine erste Wicklung besitzt, die in den ersten Stromzweig geschaltet ist, und eine zweite Wicklung gleicher Windungszahl besitzt, die mit entgegengesetztem Wicklungssinn in den zweiten Stromzweig geschaltet ist,
- einen zweiten Transformator zur Symmetrierung der Lampenströme besitzt, wobei
- der zweite Transformator eine erste und eine zweite Wicklung gleicher. Windungszahl besitzt, wobei die erste Wicklung vor der Parallelschaltung der Stromzweige und die zweite Wicklung hinter der Parallelschaltung der Stromzweige angeordnet ist, und wobei
- die erste und die zweite Wicklung des zweiten Transformators derart angeordnet sind, dass sie bei angeschlossenen Niederdruckentladungslampen gegensinnig von dem Gesamtstrom der Parallelschaltung der Stromzweige durchflossen werden.
- Figur 1
- Die Schaltungsanordnung eines Vorschaltgerätes gemäß des ersten Ausführungsbeispiels der Erfindung in schematischer Darstellung
- Figur 2
- Die Schaltungsanordnung eines Vorschaltgerätes gemäß des zweiten Ausführungsbeispiels der Erfindung in schematischer Darstellung
- Figur 3
- Die Schaltungsanordnung eines Vorschaltgerätes gemäß des dritten Ausführungsbeispiels der Erfindung in schematischer Darstellung
- Figur 4
- Die Schaltungsanordnung eines Vorschaltgerätes gemäß des vierten Ausführungsbeispiels der Erfindung in schematischer Darstellung
- Figur 5
- Die Schaltungsanordnung eines Vorschaltgerätes gemäß des fünften Ausführungsbeispiels der Erfindung in schematischer Darstellung
- Figur 6
- Die Schaltungsanordnung eines Vorschaltgerätes gemäß des sechsten Ausführungsbeispiels der Erfindung in schematischer Darstellung
- Figur 7
- Die Schaltungsanordnung eines Vorschaltgerätes gemäß des siebten Ausführungsbeispiels der Erfindung in schematischer Darstellung
- Figur 8
- Die Schaltungsanordnung eines Vorschaltgerätes gemäß des achten Ausführungsbeispiels der Erfindung in schematischer Darstellung
Claims (9)
- Vorschaltgerät zum Betrieb von mehreren Niederdruckentladungslampen, wobei das Vorschaltgerät drei parallel geschaltete Stromzweige besitzt, in die jeweils elektrische Anschlüsse für mindestens eine Niederdruckentladungslampe (L10, L11, L12) geschaltet sind,
dadurch gekennzeichnet, dassdas Vorschaltgerät einen Transformator (Tr10) zur Symmetrierung der Lampenströme aufweist,der Transformator (Tr10) eine erste (10a) und eine zweite Wicklung (lOb) besitzt, wobei die erste Wicklung (10a) doppelt so viele Windungen wie die zweite Wicklung (10b) besitzt,das Vorschaltgerät einen zweiten Transformator (Tr11) zur Symmetrierung der Lampenströme aufweist, wobei der zweite Transformator (Tr11) eine erste (11a) und eine zweite Wicklung (11b) besitzt und die erste Wicklung (11a) doppelt so viele Windungen wie die zweite Wicklung (11b) besitzt,die Wicklungen (10a, 10b, 11a, 11b) der Transformatoren (Tr10, Tr11) derart angeordnet sind, dass bei angeschlossenen Niederdruckentladungslampen (L10, L11, L12), die Lampenströme zuerst durch die Wicklungen (10a, 10b bzw. 11a, 11b) eines der beiden Transformatoren (Tr10 bzw. Tr11), dann durch die Niederdruckentladungslampen (L10, L11, L12) und anschließend erst durch die Wicklungen (11a, 11b bzw. 10a, 10b) des anderen Transformators (Tr11 bzw. Tr10) fließen,die erste Wicklung (10a) des ersten Transformators (Tr10) derart angeordnet ist, dass sie bei angeschlossenen Niederdruckentladungslampen (L10, L11, L12) von dem Lampenstrom der in den ersten Stromzweig geschalteten Niederdruckentladungslampe (L10) bzw. Niederdruckentladungslampen durchflossen wird,die zweite Wicklung (10b) des ersten Transformators (Tr10) derart angeordnet ist, dass sie bei angeschlossenen Niederdruckentladungslampen (L10, L11, L12) von den Lampenströmen der in den zweiten und dritten Stromzweig geschalteten Niederdruckentladungslampen (L11, L12) durchflossen wird, wobei die beiden Wicklungen (10a, 10b) des ersten Transformators (Tr10) gegensinnig gewickelt sind,die erste Wicklung (11a) des zweiten Transformators (Tr11) derart angeordnet ist, dass sie bei angeschlossenen Niederdruckentladungslampen (L10, L11, L12) von dem Lampenstrom der in den dritten Stromzweig geschalteten Niederdruckentladungslampe (L12) bzw. Niederdruckentladungslampen durchflossen wird,die zweite Wicklung (llb) des zweiten Transformators (Tr11) derart angeordnet ist, dass sie bei angeschlossenen Niederdruckentladungslampen (L10, L11, L12) von den Lampenströmen der in den ersten und zweiten Stromzweig geschalteten Niederdruckentladungslampen (L10, L11) durchflossen wird, wobei die beiden Wicklungen (11a, 11b) des zweiten Transformators (Tr11) gegensinnig gewickelt sind. - Vorschaltgerät zum Betrieb von mehreren Niederdruckentladungslampen, wobei das Vorschaltgerät drei parallel geschaltete Stromzweige besitzt, in die jeweils elektrische Anschlüsse für mindestens eine Niederdruckentladungslampe (L20, L21, L22; L30, L31, L32; L33, L34, L35) geschaltet sind,
dadurch gekennzeichnet, dassdas Vorschaltgerät einen Transformator (Tr2; Tr30) zur Symmetrierung der Lampenströme aufweist,der Transformator (Tr2; Tr30) drei identisch aufgebaute und isotrop angeordnete Wicklungen (2a, 2b, 2c; 30a, 30b, 30c) besitzt, die jeweils so in einem der Stromzweige angeordnet sind, dass sie gleichsinnig vom Lampenstrom durchflossen werden. - Vorschaltgerät nach Anspruch 2, dadurch gekennzeichnet, dass mindestens einer der drei parallel geschalteten Stromzweige elektrische Anschlüsse für eine Serienschaltung von mehreren Niederdruckentladungslampen (L30, L31, L32; L33, L34, L35) aufweist, und das Vorschaltgerät einen zweiten Transformator (Tr31) mit zwei Wicklungen (31a, 31b) gleicher Windungszahl zur Symmetrierung der Lampenströme besitzt, wobei die erste Wicklung (31a) des zweiten Transformators (Tr31) vor der Parallelschaltung der drei Stromzweige und die zweite Wicklung (31b) hinter der Parallelschaltung der drei Stromzweige angeordnet ist, so dass die beiden Wicklungen (31a, 31b) des zweiten Transformators (Tr31) bei angeschlossenen Niederdruckentladungslampen (L30, L31, L32; L33, L34, L35) gegensinnig von dem Gesamstrom der Stromzweige durchflossen werden.
- Vorschaltgerät zum Betrieb von mehreren Niederdruckentladungslampen, wobeidas Vorschaltgerät einen Transformator (Tr40; Tr50; Tr60) zur Symmetrierung der Lampenströme aufweist,das Vorschaltgerät zwei parallel geschaltete Stromzweige besitzt, in die jeweils elektrische Anschlüsse für mindestens eine Niederdruckentladungslampe (L40-L43; L50-L52; L60, L61) geschaltet sind,der Transformator (Tr40; Tr50; Tr60) eine erste Wicklung (40a; 50a; 60a) besitzt, die in den ersten Stromzweig geschaltet ist, und eine zweite Wicklung (40b; 50b; 60b) gleicher Windungszahl besitzt, die mit entgegengesetztem Wicklungssinn in den zweiten Stromzweig geschaltet ist,das Vorschaltgerät einen zweiten Transformator (Tr41; Tr51; Tr61) zur Symmetrierung der Lampenströme besitzt,der zweite Transformator (Tr41; Tr51; Tr61) eine erste (41a; 51a; 61a) und eine zweite Wicklung (41b; 51b; 61b) gleicher Windungszahl besitzt, wobei die erste Wicklung (41a; 51a; 61a) vor der Parallelschaltung der Stromzweige und die zweite Wicklung (41b; 51b; 61b) hinter der Parallelschaltung der Stromzweige angeordnet ist, unddie erste (41a; 51a; 61a) und die zweite Wicklung (41b; 51b; 61b) des zweiten Transformators (Tr41; Tr51; Tr61) derart angeordnet sind, dass sie bei angeschlossenen Niederdruckentladungslampen (L40-L43; L50-L52; L60, L61) gegensinnig von dem Gesamtstrom der Parallelschaltung der Stromzweige durchflossen werden.
- Vorschaltgerät nach Anspruch 4, dadurch gekennzeichnet, dass der erste und der zweite Stromzweig jeweils elektrische Abschlüsse für zwei in Serie zu schaltende Niederdruckentladungslampen (L40, L41, L42, L43) aufweisen.
- Vorschaltgerät nach Anspruch 4, dadurch gekennzeichnet, dass der erste Stromzweig elektrische Anschlüsse für die Serienschaltung von zwei Niederdruckentladungslampen (L50, L51) und der zweite Stromzweig elektrische Anschlüsse für eine Niederdruckentladungslampe (L52) aufweist.
- Vorschaltgerät zum Betrieb von einer oder mehreren in Serie geschalteten Niederdruckentladungslampen, wobei das Vorschaltgerät einen Transformator (Tr8; Tr7) mit zwei Wicklungen (8a, 8b; 7a, 7b) gleicher Windungszahl aufweist, und wobei die erste Wicklung (8a; 7a) der Niederdruckentladungslampe (L8) bzw. der Serienschaltung der Niederdruckentladungslampen (L70, L71) unmittelbar vorgeschaltet ist, und die zweite Wicklung (8b; 7b) der Niederdruckentladungslampe (L8) bzw. der Serienschaltung der Niederdruckentladungslampen (L70, L71) unmittelbar nachgeschaltet ist, so dass die Wicklungen des Transformators (Tr8; Tr7) bei angeschlossener Niederdruckentladungslampe (L8) bzw. bei angeschlossenen Niederdruckentladungslampen (L70, L71) gegensinnig vom Lampenstrom durchflossen werden.
- Vorschaltgerät nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Vorschaltgerät als Wechselrichter (T1, T2) mit einem nachgeschalteten Lastkreis ausgebildet ist, wobei die elektrischen Anschlüsse für die Niederdruckentladungslampen bzw. die Stromzweige mit den elektrischen Anschlüssen für mindestens eine Niederdruckentladungslampe in dem Lastkreis angeordnet sind.
- Vorschaltgerät nach Anspruch 10, dadurch gekennzeichnet, dassder Wechselrichter als Halbbrückenwechselrichter mit zwei Schalttransistoren (T1, T2) und einem Halbbrückenkondensator (C2) ausgebildet ist,der Lastkreis als Serienresonanzkreis mit einer Resonanzinduktivität (L1) und einem Resonanzkondensator (C1) ausgebildet ist,jeweils ein Anschluß des Resonanzkondensators (C1) und des Halbbrückenkondensators (C2) auf Massepotential liegen,der zweite Anschluß des Resonanzkondensators (C1) über die Resonanzinduktivität (L1) mit dem Mittenabgriff (M1) des Halbbrückenwechselrichters verbunden ist, unddie Stromzweige bzw. die Serienschaltung bzw. die elektrischen Anschlüsse für die mindestens eine Niederdruckentladungslampe zwischen den zweiten Anschluß des Resonanzkondensators (C1) und den zweiten Anschluß des Halbbrückenkondensators (C2) geschaltet sind.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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EP08150534A EP1915036B1 (de) | 2001-07-23 | 2002-05-22 | Vorschaltgerät zum Betrieb mindestens einer Niederdruckentladungslampe |
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DE10134966A DE10134966A1 (de) | 2001-07-23 | 2001-07-23 | Vorschaltgerät zum Betrieb mindestens einer Niederdruckentladungslampe |
DE10134966 | 2001-07-23 |
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EP08150534A Division EP1915036B1 (de) | 2001-07-23 | 2002-05-22 | Vorschaltgerät zum Betrieb mindestens einer Niederdruckentladungslampe |
Publications (3)
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EP1286572A2 true EP1286572A2 (de) | 2003-02-26 |
EP1286572A3 EP1286572A3 (de) | 2005-01-19 |
EP1286572B1 EP1286572B1 (de) | 2008-10-29 |
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EP08150534A Expired - Lifetime EP1915036B1 (de) | 2001-07-23 | 2002-05-22 | Vorschaltgerät zum Betrieb mindestens einer Niederdruckentladungslampe |
EP02011284A Expired - Lifetime EP1286572B1 (de) | 2001-07-23 | 2002-05-22 | Vorschaltgerät zum Betrieb mindestens einer Niederdruckentladungslampe |
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EP08150534A Expired - Lifetime EP1915036B1 (de) | 2001-07-23 | 2002-05-22 | Vorschaltgerät zum Betrieb mindestens einer Niederdruckentladungslampe |
Country Status (5)
Country | Link |
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US (1) | US6717371B2 (de) |
EP (2) | EP1915036B1 (de) |
AT (2) | ATE459232T1 (de) |
CA (1) | CA2394409A1 (de) |
DE (3) | DE10134966A1 (de) |
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- 2002-05-22 AT AT08150534T patent/ATE459232T1/de not_active IP Right Cessation
- 2002-05-22 DE DE50214247T patent/DE50214247D1/de not_active Expired - Lifetime
- 2002-05-22 AT AT02011284T patent/ATE413086T1/de active
- 2002-05-22 EP EP08150534A patent/EP1915036B1/de not_active Expired - Lifetime
- 2002-05-22 EP EP02011284A patent/EP1286572B1/de not_active Expired - Lifetime
- 2002-07-16 US US10/195,362 patent/US6717371B2/en not_active Expired - Fee Related
- 2002-07-22 CA CA002394409A patent/CA2394409A1/en not_active Abandoned
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DE102010041618A1 (de) | 2010-09-29 | 2011-12-22 | Osram Gesellschaft mit beschränkter Haftung | Schaltungsanordnung zum Betreiben mindestens zweier Halbleiterlichtquellen |
DE102010041632A1 (de) | 2010-09-29 | 2012-03-29 | Osram Gesellschaft mit beschränkter Haftung | Schaltungsanordnung zum Betreiben mindestens zweier Halbleiterlichtquellen |
DE102010041613A1 (de) | 2010-09-29 | 2012-03-29 | Osram Ag | Schaltungsanordnung zum Betreiben mindestens zweier Halbleiterlichtquellen |
WO2012041783A1 (de) | 2010-09-29 | 2012-04-05 | Osram Ag | Schaltungsanordnung zum betreiben mindestens zweier halbleiterlichtquellen |
Also Published As
Publication number | Publication date |
---|---|
DE10134966A1 (de) | 2003-02-06 |
EP1286572B1 (de) | 2008-10-29 |
US6717371B2 (en) | 2004-04-06 |
EP1915036A1 (de) | 2008-04-23 |
DE50212951D1 (de) | 2008-12-11 |
CA2394409A1 (en) | 2003-01-23 |
US20030015974A1 (en) | 2003-01-23 |
EP1286572A3 (de) | 2005-01-19 |
EP1915036B1 (de) | 2010-02-24 |
ATE413086T1 (de) | 2008-11-15 |
DE50214247D1 (de) | 2010-04-08 |
ATE459232T1 (de) | 2010-03-15 |
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