EP0808085B1 - Hochfrequenzbetriebsschaltung für eine Niederdruckentladungslampe mit verbesserter elektromagnetischer Verträglichkeit - Google Patents
Hochfrequenzbetriebsschaltung für eine Niederdruckentladungslampe mit verbesserter elektromagnetischer Verträglichkeit Download PDFInfo
- Publication number
- EP0808085B1 EP0808085B1 EP97107207A EP97107207A EP0808085B1 EP 0808085 B1 EP0808085 B1 EP 0808085B1 EP 97107207 A EP97107207 A EP 97107207A EP 97107207 A EP97107207 A EP 97107207A EP 0808085 B1 EP0808085 B1 EP 0808085B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- capacitor
- push
- frequency generator
- pump
- diodes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- 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
- H05B41/295—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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/355—Power factor correction [PFC]; Reactive power compensation
Definitions
- the present invention relates to an operating circuit for one or more Discharge lamps that are operated with high-frequency power should.
- the high frequency operation of discharge lamps has besides the avoidance a line frequency modulation of the emitted light during mains operation the advantage of a significant increase in lamp efficiency.
- Ballasts are referred to C. H. Sturm and E. Klein “control gear and circuits for electric lamps ", 6th edition 1992, Siemens AG, in particular Pages 121 to 137, as well as on W. Hirschmann “Electronics Circuits", 1982, Siemens AG, pages 147 and 148.
- the invention is based on a circuit for high-frequency operation at least one discharge lamp according to the preamble of claim 1.
- Fig. 1 shows the corresponding circuit structure, the above capacitors are designated there with C6 and CT2.
- the label the other components correspond to the reference symbols in the preamble of claim 1. To further describe this circuit is on referred to below the description of the invention, whose in Fig. 2 embodiment shown on the circuit shown in Fig. 1 builds up.
- the invention is based on the technical problem, the operating properties the circuit from the prior art with special consideration to further improve electromagnetic compatibility.
- a trapezoidal capacitor connected behind the pump capacitor, as described above has the advantage that the push-pull frequency generator instead with a parallel connection with a series connection of pump capacitor and trapezoidal capacitor is capacitively loaded.
- the switching relief of the transistors of the push-pull frequency generator is even more difficult to achieve the greater the capacity connected directly to its center tap is.
- trapezoidal capacitor used in this technical Naturalized area and denotes a generally relatively small one Capacitor, which is used for the temporal “damping" of recharging and potential jump processes serves that without it relatively “hard”, i.e. with very steep Potential-time edges would run through the trapezoidal capacitor however, get a beveled, trapezoidal potential-time form.
- connection point is between the two diodes across the pump capacitor with a point between connected to the center tap of the push-pull frequency generator Resonance inductance and the connection of the first lamp electrode connected.
- this pump branch is a trapezoidal capacitor assigned by this on the pump branch side at the connection point between the diodes is connected.
- connection point between the two diodes via the pump capacitor connected to the center tap of the push-pull frequency generator Analogous a trapezoidal capacitor is assigned to this pump branch, this on the pump branch side at the center tap between the diodes connected.
- a typical rating for the capacitance of the trapezoidal capacitor (s) can be one fifth to one twentieth, preferably one tenth the capacitance of the respective capacitor (s) in the corresponding Be pump branches.
- Fig. 1 shows a schematic circuit diagram of a the preamble of Claim 1 forming circuit from the prior art.
- Fig. 2 shows the embodiment.
- the rectified voltage becomes about one described below Diodes D1 to D4 belonging to harmonic filters and via the between the plus and the minus line located in the figures above switched smoothing capacitor C4 a half bridge made of two bipolar transistors T1 and T2 fed. Together with one not shown Control transmitter for controlling the bases of T1 and T2 is therefore a Push-pull frequency generator formed, which, to put it graphically, the potential the center tap between the transistors alternately to the potential the plus and the minus line pushes. For the sake of clarity are not essential circuit parts in the figures for the principle of the invention omitted, such as the tax transmitter, which is still below mentioned starting circuit, ballast resistors u. Like ..
- the control transmitter is, in particular, in the documents cited at the beginning also at C.H. Sturm and E. Klein and with W. Hirschmann, described and consists essentially of a primary winding in series with one on the Center tap between the transistors T1 and T2 connected resonance inductance L1 and two secondary windings wound in opposite directions in the drive circuits to the bases of the transistors.
- the saturation inductance is designed so that there are short breaks between the line periods of the two transistors T1 and T2 result.
- the starting circuit consists essentially of a capacitor, which is at the forward voltage of a DIAC through it into one of the transistor bases discharges and is also described in the cited writings.
- the transistors are each with freewheeling diodes parallel to the switching path Clear the space charges in the transistors in the blocked state.
- a series connection of the resonance inductance L1 Between the center tap and the lower (i.e. minus) outside tap of the Push-pull frequency generator is a series connection of the resonance inductance L1, a low pressure discharge lamp, i.e. their discharge route, and a coupling capacitor C5 connected for DC isolation.
- the Diode forward direction of the direct current direction from the mains rectifier corresponds.
- a center tap of the diode series connection D1 and D2 on the one hand and a connection point between the resonance inductance L1 and the corresponding terminal of the lamp on the other hand is one Pump capacitor C1 switched, with which a first pump branch of a harmonic filter is formed.
- a second pump branch is correspondingly made of the diodes D3 and D4 and that between their center tap and the center tap of the Push-pull frequency generator switched pump capacitor C2 formed.
- the pump branch D1, D2, C1 engages a high-frequency potential between L1 and the lamp leads through the capacitor C1 a conversion into one Pump current through and supplemented with this rectified by the diodes D1 and D2 Current the voltage UG to voltage E.
- the other pump branches D3, D4, C2 using the potential at the center tap the transistor bridge.
- Task of this harmonic filter with branches D1, D2, C1 and D3, D4, C2 is opposed to one by returning energy to the smoothing capacitor C4 of the voltage UG at the support capacitor C3 is the smoothest possible voltage E and generate a sinusoidal mains current consumption as possible of the mains rectifier.
- the electromagnetic Compatibility not only with regard to the feedback into the DC voltage source, so here via the rectifier circuit into the network, optimized be, but also in terms of electromagnetic radiation. To further Details are referred to the cited publications, in particular to EP 0 253 224 B1.
- the lower connection of the capacitor CT2 is, so to speak shifted, namely behind the pump capacitor C2, so that the capacitor 2 between the center tap between D3 and D4 on the one hand and the upper positive line, i.e. the upper external tap of the push-pull frequency generator on the other hand. It therefore forms a trapezoidal capacitor in series with C2 for the push-pull frequency generator and also a trapezoidal capacitor for the pump branch D3, D4, C2.
- C6 parallel lamp resonance capacitor is according to the invention in the same way behind a pump capacitor, namely behind that of the other pump branch, C1, shifted. There it is shown in Fig. 2 and designated CT1.
- the lamp-parallel resonance capacitor C6 mentally omits, there is also only a diode, transistors and the lamp with the potential ultimately defined by the network "Frame" of the circuit connected circuit part from L1, C1, CT2 and C2. This results in short periods in which none of the semiconductor devices conducts, a "free floating" (quasi floating) state of this circuit part, which leads to sharp potential jumps when the circuit part, so to speak is caught again (so-called "chatter").
- they work Capacitors CT1 and CT2 in Fig. 2, one of the two, again as trapezoidal capacitors and thus improve the electromagnetic Compatibility of the overall circuit.
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Description
Claims (6)
- Schaltung zum hochfrequenten Betrieb zumindest einer Entladungslampe mit:einem kapazitiv (C3) gestützten Netzgleichrichter,einem an dem Netzgleichrichter angeschlossenen Gegentaktfrequenzgenerator mit einem Mittenabgriff für eine über eine Resonanzinduktivität (L1) anzuschließende erste Lampenelektrode und mit zwei Außenabgriffen, von denen einer für die andere Lampenelektrode vorgesehen ist,einem Glättungskondensator (C4) zwischen den Außenabgriffen des Gegentaktfrequenzgenerators undeinem aktiven Oberwellenfilter mit zumindest einem kapazitiven Pumpzweig mit einer Reihenschaltung von zwei Dioden (D1, D2; D3, D4) zwischen einem Anschluss des Stützkondensators (C3) des Netzgleichrichters und einem Außenabgriff des Gegentaktfrequenzgenerators, wobei die Durchlassrichtung der Dioden der Netzgleichrichterpolarität entspricht, und mit zumindest einem Pumpkondensator (C1; C2) zur Energierückführung zum Glättungskondensator (C4) von einem lampenseitigen Anschlusspunkt zwischen dem Mittenabgriff des Gegentaktfrequenzgenerators und/oder der Verbindung zwischen der Resonanzinduktivität (L1) und der ersten Lampenelektrode und einem Anschlusspunkt zwischen den zwei Dioden (D1, D2; D3, D4)dass zwischen dem Anschlusspunkt zwischen den zwei Dioden (D1, D2; D3, D4) und einem der Außenabgriffe des Gegentaktfrequenzgenerators ein Trapezkondensator (CT1; CT2) vorgesehen ist und somitder oder die Pumpkondensatoren (C1; C2) des oder der Pumpzweige die einzigen rein kapazitiv belastend an dem Mittenabgriff des Gegentaktfrequenzgenerators und/oder an der Verbindung zwischen der Resonanzinduktivität und der ersten Lampenelektrode angeschlossenen Kondensatoren sind.
- Schaltung nach Anspruch 1, bei der die Entladungslampe eine Niederdruckentladungslampe ist.
- Schaltung nach Anspruch 1, bei der der Anschlusspunkt zwischen den beiden Dioden (D1,D2) über den Kondensator (C1) mit einem Punkt zwischen der an dem Mittenabgriff des Gegentaktfrequenzgenerators angeschlossenen Resonanzinduktivität (L1) und dem Anschluss der ersten Lampenelektrode verbunden ist und diesem Pumpzweig ein Trapezkondensator (CT1) zugeordnet ist.
- Schaltung nach Anspruch 1, bei der der Anschlusspunkt zwischen den beiden Dioden (D3,D4) über den Kondensator (C2) mit dem Mittenabgriff des Gegentaktfrequenzgenerators verbunden ist und diesem Pumpzweig ein Trapezkondensator (CT2) zugeordnet ist.
- Schaltung nach einem der vorhergehenden Ansprüche mit zwei Pumpzweigen, bei der jedem Pumpzweig ein Trapezkondensator (CT1, CT2) zugeordnet ist.
- Schaltung nach einem der vorhergehenden Ansprüche, bei der der oder die Trapezkondensatoren (CT1; CT2) jeweils etwa ein Zehntel der Kapazität des bzw. der jeweiligen Kondensatoren (C1; C2) in den entsprechenden Pumpzweigen aufweist/aufweisen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19619581 | 1996-05-15 | ||
DE19619581A DE19619581A1 (de) | 1996-05-15 | 1996-05-15 | Hochfrequenzbetriebsschaltung für eine Niederdruckentladungslampe mit verbesserter elektromagnetischer Verträglichkeit |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0808085A2 EP0808085A2 (de) | 1997-11-19 |
EP0808085A3 EP0808085A3 (de) | 1998-11-18 |
EP0808085B1 true EP0808085B1 (de) | 2001-11-21 |
Family
ID=7794388
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97107207A Expired - Lifetime EP0808085B1 (de) | 1996-05-15 | 1997-04-30 | Hochfrequenzbetriebsschaltung für eine Niederdruckentladungslampe mit verbesserter elektromagnetischer Verträglichkeit |
Country Status (4)
Country | Link |
---|---|
US (1) | US5880564A (de) |
EP (1) | EP0808085B1 (de) |
CA (1) | CA2205344C (de) |
DE (2) | DE19619581A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19725645A1 (de) * | 1997-06-18 | 1998-12-24 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Pumpstützdrossel |
IT1296492B1 (it) | 1997-11-21 | 1999-06-25 | Whirlpool Co | Sistema per indicare il calore residuo delle griglie di apparecchi domestici di cottura a gas |
US6137234A (en) * | 1999-10-18 | 2000-10-24 | U.S. Philips Corporation | Circuit arrangement |
US6356034B1 (en) | 2000-03-22 | 2002-03-12 | Regal King Manufacturing Limited | Low voltage discharge lamp power supply |
CN1190110C (zh) * | 2001-04-03 | 2005-02-16 | 马士科技有限公司 | 荧光灯的电子镇流器的输出电路 |
US7002301B2 (en) * | 2003-10-15 | 2006-02-21 | Lutron Electronics Co., Inc. | Apparatus and methods for making capacitive measurements of cathode fall in fluorescent lamps |
TWI281364B (en) * | 2004-07-28 | 2007-05-11 | Delta Electronics Inc | Electronic ballast |
DE102004045514A1 (de) * | 2004-09-20 | 2006-03-30 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Schaltungsanordnung zum Betrieb mindestens einer Lichtquelle |
US7863827B2 (en) * | 2008-05-23 | 2011-01-04 | Osram Sylvania Inc. | Ceramic metal halide lamp bi-modal power regulation control |
CN101466191B (zh) * | 2009-01-08 | 2012-07-04 | 王家诚 | 大功率并联自激式无极荧光灯高频电子变频器 |
CN103491694B (zh) * | 2013-08-27 | 2016-03-09 | 钟海停 | 荧光灯节能专用模块 |
RU194944U1 (ru) * | 2019-08-29 | 2019-12-30 | Федеральное государственное бюджетное учреждение "Петербургский институт ядерной физики им. Б.П. Константинова Национального исследовательского центра "Курчатовский институт" (НИЦ "Курчатовский институт" - ПИЯФ) | Ключевой двухтактный генератор гармонических колебаний |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3623749A1 (de) * | 1986-07-14 | 1988-01-21 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Schaltungsanordnung zum betrieb von niederdruckentladungslampen |
US6118225A (en) * | 1994-08-22 | 2000-09-12 | U.S. Philips Corporation | High frequency discharge lamp operating circuit with resonant power factor correction circuit |
-
1996
- 1996-05-15 DE DE19619581A patent/DE19619581A1/de not_active Withdrawn
-
1997
- 1997-04-30 EP EP97107207A patent/EP0808085B1/de not_active Expired - Lifetime
- 1997-04-30 DE DE59705440T patent/DE59705440D1/de not_active Expired - Lifetime
- 1997-05-09 US US08/853,997 patent/US5880564A/en not_active Expired - Lifetime
- 1997-05-14 CA CA002205344A patent/CA2205344C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CA2205344A1 (en) | 1997-11-15 |
US5880564A (en) | 1999-03-09 |
DE19619581A1 (de) | 1997-11-20 |
EP0808085A2 (de) | 1997-11-19 |
CA2205344C (en) | 2004-09-28 |
EP0808085A3 (de) | 1998-11-18 |
DE59705440D1 (de) | 2002-01-03 |
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