EP1028606B1 - Circuit pour alimenter au moins une lampe à décharge à basse pression - Google Patents

Circuit pour alimenter au moins une lampe à décharge à basse pression Download PDF

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Publication number
EP1028606B1
EP1028606B1 EP00100767A EP00100767A EP1028606B1 EP 1028606 B1 EP1028606 B1 EP 1028606B1 EP 00100767 A EP00100767 A EP 00100767A EP 00100767 A EP00100767 A EP 00100767A EP 1028606 B1 EP1028606 B1 EP 1028606B1
Authority
EP
European Patent Office
Prior art keywords
capacitor
diode
harmonic filter
mains voltage
inverter
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
Application number
EP00100767A
Other languages
German (de)
English (en)
Other versions
EP1028606A2 (fr
EP1028606A3 (fr
Inventor
Bernd Rudolph
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP1028606A2 publication Critical patent/EP1028606A2/fr
Publication of EP1028606A3 publication Critical patent/EP1028606A3/fr
Application granted granted Critical
Publication of EP1028606B1 publication Critical patent/EP1028606B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/07—Starting and control circuits for gas discharge lamp using transistors

Definitions

  • the invention relates to a circuit arrangement for operating at least one low-pressure discharge lamp according to the preamble of claim 1.
  • Such a circuit arrangement is for example in the European patent specification EP 0 253 224 B1.
  • This patent describes a circuit arrangement for the high-frequency operation of low-pressure discharge lamps.
  • the circuit arrangement has a mains voltage rectifier, an inverter, a load circuit formed as a series resonant circuit and a harmonic filter, the is provided for reducing the harmonic content of the mains.
  • the harmonic filter shows a series circuit of two diodes, which in the forward direction of the mains voltage rectifier connected, a capacitor that the center tap between the diodes connects to the voltage output of the inverter, and another capacitor having the center tap between the diodes a tap in the series resonant circuit connects, on.
  • the harmonic filter has two more diodes, which are parallel to the two diodes of the harmonic filter are switched and their center tap with the voltage output of the Inverter is connected.
  • the published patent application EP 0 244 644 A1 discloses a circuit arrangement for high-frequency operation of a low-pressure discharge lamp.
  • This circuit arrangement has a harmonic filter, which is essentially of two series to the DC output of a mains voltage rectifier connected diodes and a capacitor is formed between the center tap of the aforementioned, serially arranged diodes and the center tap of the transistors of a half-bridge inverter is switched.
  • European patent application EP 0 679 046 A1 discloses a circuit arrangement for the operation of low-pressure discharge lamps with comparatively high burning voltages described.
  • This circuit has a high-frequency rectifier bridge, the charging of the inverter feeding smoothing capacitor interrupts in the switching rhythm of the inverter and thereby, in conjunction with one of the high-frequency rectifier bridge upstream Storage choke and one arranged at the output of the mains voltage rectifier Capacitor in interaction with a backup capacitor and a negative feedback capacitor an almost sinusoidal mains current drain with a Network power factor greater than 0.98 allowed.
  • the circuit arrangement according to the invention has a mains voltage rectifier, one parallel to the DC output of the mains voltage rectifier switched capacitor, an inverter with a downstream, as Series resonant circuit formed load circuit, one parallel to the DC input the inverter switched smoothing capacitor and a harmonic filter, which has at least one diode and a capacitor on.
  • a first connection the at least one capacitor of the harmonic filter is connected to the resonance capacitor of the series resonant circuit, with a first electrode of at least a diode of the harmonic filter and with the DC output of the Mains voltage rectifier connected.
  • the second port of the at least one capacitor of the harmonic filter with the voltage output of the inverter and the second electrode of the at least one diode of the harmonic filter connected to the smoothing capacitor.
  • the parallel to the DC output of the mains voltage rectifier switched Capacitor is dimensioned so that its capacity is at least 0.33 times the capacitance of the resonant capacitor is.
  • the capacity of the parallel to the DC output of the Mains voltage rectifier switched capacitor at most as large as the Capacitance of the resonance capacitor. Due to this advantageous dimensioning of Capacitance values of the aforementioned capacitors is even in the case that the Voltage drop across the at least one low-pressure discharge lamp the voltage drop exceeds on the smoothing capacitor, nor a nearly sinusoidal Mains current consumption and a correspondingly low harmonic content guaranteed. In this way, a circuit arrangement with a compared to Prior art simplified and less expensive harmonic filter that made a reduced number of electrical components is provided.
  • FIG. 1 shows a schematic representation of the invention Circuit arrangement according to a preferred embodiment of the Invention.
  • This circuit has a mains voltage input j1, j2 and a filter circuit connected to the mains voltage input j 1, j 2, the off a current-compensated filter choke L1, a non-current-compensated filter choke L2 and a capacitor C1, and one downstream of the filter circuit Mains voltage rectifier GL.
  • Parallel to the DC voltage output of the mains voltage rectifier GL is, at the branch points j3, j4, a Backup capacitor C2 connected.
  • To the positive output of the mains voltage rectifier GL is connected via the branch point j3, the anode of a diode D1.
  • the cathode of diode D1 is connected to the positive terminal of a smoothing capacitor C3 connected.
  • the negative terminal of the smoothing capacitor C3 is above branch point j4 with the negative output of the mains voltage rectifier GL connected.
  • the smoothing capacitor C3 serves as a DC voltage source for a free-running half-bridge inverter manufactured by two transistors Q1, Q2, its drive device N1, N2, N3, L3, L4, R1, R2, R4, R5 and the emitter resistors R3, R6 and two freewheeling diodes D2, D3, each parallel to the collector-emitter path of one of the transistors Q1 or Q2 are connected, is formed.
  • the DC input of the half-bridge inverter Q1, Q2, of the collector terminal of the transistor Q1 and the emitter terminal of the transistor Q2 and the emitter resistor R5 is formed is arranged parallel to the smoothing capacitor C3.
  • the load circuit has the primary winding N1 of the toroidal transformer belonging to the drive device, a coupling capacitor C4, a lamp inductor L5 and a Resonance capacitor C6, which are all connected in series, on.
  • the center tap M of the half-bridge inverter Q1, Q2 is via the primary winding N1, the coupling capacitor C4, the lamp inductor L5 and the resonance capacitor C6 with the Anode of the diode D1 and connected to the branch point j3.
  • the circuit arrangement also has a trapezoidal capacitor C7 whose first terminal with the anode of the diode D1 and with the branch point j3 and its second terminal to the center tap M of the half-bridge inverter Q1, Q2 connected is.
  • the circuit has a starting device, the from a Diac DC, a starting capacitor C9, a resistor R7 and a Diode D4, and terminals j5, j6, j7, j8 for two low-pressure discharge lamps connected in series LP1, LP2, as well as a starter capacitor C8.
  • the ignition auxiliary capacitor C8 is arranged parallel to the second low-pressure discharge lamp LP2.
  • a first terminal of the auxiliary ignition capacitor C8 is via a node in the load circuit with the resonance capacitor C6 and with the lamp inductor L5 connected.
  • the second terminal of the auxiliary ignition capacitor C8 is connected to the second Electrode of the first low-pressure discharge lamp LP1 and with the first electrode the second low-pressure discharge lamp LP2 connected.
  • the first electrode of the first low-pressure discharge lamp LP1 is connected via the terminal j5 to the cathode the diode D1, with the collector of the transistor Q1 and with the positive terminal of the smoothing capacitor C3 and connected via terminal j6, the resistor R7 and the starting capacitor C9 with the terminal j4 and the negative Connection of the smoothing capacitor C3 connected.
  • the second electrode of the second low-pressure discharge lamp LP2 is connected via the terminal J8 with the lamp inductor L5, the resonant capacitor C6 and the auxiliary ignition capacitor C8 connected.
  • the starting device serves for the oscillation of the half-bridge inverter Q1, Q2.
  • the Diac DC generates trigger pulses after switching on the operating device for the base of transistor Q2.
  • a Diacs DC connection is for this purpose with a arranged between the resistor R7 and the starting capacitor C9 Tap connected while the other terminal of Diacs DC via the base resistor R4 is connected to the base of the transistor Q2.
  • the inverter is a free-running half-bridge inverter with two Bipolar transistors Q1, Q2 formed.
  • the drive of the inverter takes place essentially by means of the toroidal transformer N1, N2, N3, whose primary winding N1 is arranged in the load circuit and its secondary windings N2, N3 each in a base circuit of one of the two inverter transistors Q1, Q2 are arranged.
  • the drive device points for both transistors Q1, Q2 each have a base resistor R1 or R4, an inductance L3 and L4 and a parallel to the base-emitter junction connected resistor R2 and R5, which improves the switching behavior of the inverter transistors Q1, Q2 on.
  • the backup capacitor C2 After switching on the circuit arrangement is located on the backup capacitor C2 the rectified by the mains voltage rectifier GL mains voltage. Via the diode D1 and the resistor R7, the starting capacitor C9 on the Breakdown voltage of the Diac DC charged so that the Diac DC trigger pulses generates for driving the base electrode of the transistor Q2 and thereby the oscillation of the half-bridge inverter Q1, Q2 triggers. With the help of the ring core transformer RK, the base electrodes of the transistors Q1, Q2 are driven in such a way, that the transistors Q1, Q2 switch alternately.
  • the starting capacitor C9 is turned on by turning on the transistor Q2 via the diode D4, via the Switching path of the transistor Q2 and so far discharged via the emitter resistor R6, that the Diac DC no longer generates any further trigger pulses.
  • the Load circuit and through the series-connected lamps LP1, LP2 flows a high-frequency Alternating current whose frequency is controlled by the switching clock of the transistors Q1, Q2 is determined.
  • the smoothing capacitor C3 a DC voltage is built up, their value is about 1.4 times to 1.5 times the peak value of the mains voltage equivalent.
  • the coupling capacitor C4 is approximately half of the am Smoothing capacitor C3 applied voltage charged.
  • the center tap By alternating Turning on the transistors Q1, Q2, the center tap will alternate with the negative and the positive terminal of the smoothing capacitor C3 and the potential of the center tap has been lowered or raised accordingly. Thereby flows in the load circuit by the transistor switching clock certain, high-frequency AC. During the switching pauses of the transistors Q1, Q2, during the both transistors Q1, Q2 latch, holds the stored in the lamp inductor L5 Energy the current flow through the corresponding freewheeling diode D2 or D3 upright.
  • the lamp inductor L5 forms a series resonant circuit with the resonance capacitor C6.
  • the electrical components of the circuit arrangement are dimensioned that for igniting a gas discharge in the low-pressure discharge lamps LP1, LP2 at the resonant capacitor C6 and the auxiliary ignition capacitor C8 a resonance-elevated Voltage is provided. After ignition of the gas discharge becomes the series resonant circuit C6, L5 by the impedance of the discharge strands the low-pressure discharge lamps LP1, LP2 attenuated.
  • the diode D1, the backup capacitor C2, the trapezoidal capacitor C7 and the resonance capacitor C6 form a harmonic filter, which is in the switching cycle of the inverter Q1, Q2 and proportional to the mains voltage small amounts of charge in the smoothing capacitor Feeds C3.
  • the backup capacitor C2, the resonant capacitor C6, the trapezoidal capacitor C7 and the diode D1 act together as a charge pump.
  • the center tap M of the inverter becomes Q1, Q2 through the conductive collector-emitter path of the transistor Q2 with the negative pole of the mains voltage rectifier output connected.
  • the trapezoidal capacitor C7 is then corresponding to the potential difference caused by the difference the instantaneous value of the voltage at the backup capacitor C2 and the potential at Center tap M is determined, loaded.
  • At the backup capacitor C2 is a pulsating DC voltage whose frequency is twice as large as the mains voltage frequency is. If the mains voltage just passes through its vertex, then the Trapezoidal capacitor C7 charged approximately 1.4 times the mains voltage value.
  • the potential at the center tap M of the inverter Q1, Q2 and accordingly the potential at the trapezoidal capacitor C7 jumped up.
  • the trapezoidal capacitor C7 receives thereby a higher potential than the smoothing capacitor C3 and can therefore on the Discharge diode D1 into the smoothing capacitor C3.
  • Per switching cycle of the inverter Q1, Q2 or per period of the high-frequency AC voltage is thus once energy in the smoothing capacitor Pumped C3.
  • the frequency of the alternating current flowing in the load circuit is typically more than 20 kHz.
  • the charge portions pumped into the smoothing capacitor C3 are proportional to the instantaneous value of the backup capacitor C2 voltage applied.
  • the nominal value of the Capacitance of the backup capacitor C2 at least 0.33 times the nominal value the capacitance of the resonant capacitor C6 amount. Too high charging currents too Avoid, the nominal value of the capacitance of the backup capacitor C2 should be the nominal value do not exceed the capacitance of the resonance capacitor C6.
  • the circuit arrangement according to the invention additional components, such as a device for preheating the electrode coils of the low-pressure discharge lamps LP1, LP2 or a safety shutdown, which shuts off the inverter in case of defective lamps have.
  • the harmonic filter may comprise at least one further, forward biased diode, wherein a first electrode of this diode with the DC voltage output of the mains voltage rectifier and the second electrode via a branch point with the parallel to the DC output of the mains voltage rectifier switched capacitor, with the resonant capacitor, with the at least one Capacitor of the harmonic filter and connected to the at least one diode of the harmonic filter.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Inverter Devices (AREA)

Claims (2)

  1. Circuit pour faire fonctionner au moins une lampe à décharge à basse pression comprenant
    un redresseur (GL) de la tension du réseau,
    un condensateur (C2) qui est monté en parallèle à la sortie (+, -) de tension continue du redresseur (GL) de la tension du réseau,
    un onduleur (Q1, Q2) ayant une entrée de tension continue et une sortie (M) de tension,
    un circuit de charge, qui est constitué en circuit résonance série et qui est raccordé à la sortie (M) de tension de l'onduleur (Q1, Q2), le circuit de charge ayant au moins un condensateur (C6) de résonance, une bobine (L5) de lampe et des bornes (j5, j6, j7, j8) pour au moins une lampe (LP1, LP2) à décharge à basse pression,
    un condensateur (C3) de lissage, qui est monté en parallèle à l'entrée de tension continue de l'onduleur (Q1, Q2),
    un filtre d'harmonique, qui a au moins une diode (D1) et au moins un condensateur (C7), une première borne du au moins un condensateur (C7) du filtre d'harmonique étant reliée au condensateur (C6) de résonance, à une première électrode de la au moins une diode (D1) du filtre d'harmonique et à la sortie (+, -) de tension continue du redresseur (GL) de tension de réseau, la deuxième borne du au moins un condensateur (C7) du filtre d'harmonique étant reliée à la sortie (M) de tension de l'onduleur (Q1, Q2) et la deuxième électrode de la au moins une diode (D1) du filtre d'harmonique étant reliée au condensateur (C3) de lissage,
       caractérisé en ce que le filtre d'harmonique est formé par le condensateur (C2) monté en parallèle à la sortie (+, -) de tension continue du redresseur (GL) de tension du réseau, par le condensateur (C6) de résonance, par le au moins un condensateur (C7) et par la au moins une diode (D1), la valeur nominale de la capacité du condensateur (C2) monté en parallèle à la sortie (+, -) de tension continue du redresseur (GL) de tension du réseau étant inférieure ou égale à la valeur nominale de la capacité du condensateur (C6) de résonance et supérieure ou égale à 0,33 fois la valeur nominale de la capacité du condensateur (C6) de résonance.
  2. Circuit suivant la revendication 1, caractérisé en ce que le filtre d'harmonique comprend au moins une autre diode, une première électrode de cette diode étant reliée à la sortie de tension continue du redresseur de la tension du réseau et la deuxième électrode étant reliée par un point de dérivation au condensateur monté en parallèle à la sortie de tension continue du redresseur de la tension du réseau, au condensateur de résonance, au au moins un condensateur du filtre d'harmonique et à la au moins une diode du filtre d'harmonique.
EP00100767A 1999-02-11 2000-01-15 Circuit pour alimenter au moins une lampe à décharge à basse pression Expired - Lifetime EP1028606B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19905487A DE19905487A1 (de) 1999-02-11 1999-02-11 Schaltungsanordnung zum Betrieb mindestens einer Niederdruckentladungslampe
DE19905487 1999-02-11

Publications (3)

Publication Number Publication Date
EP1028606A2 EP1028606A2 (fr) 2000-08-16
EP1028606A3 EP1028606A3 (fr) 2003-03-19
EP1028606B1 true EP1028606B1 (fr) 2005-03-23

Family

ID=7897030

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00100767A Expired - Lifetime EP1028606B1 (fr) 1999-02-11 2000-01-15 Circuit pour alimenter au moins une lampe à décharge à basse pression

Country Status (9)

Country Link
US (1) US6259213B1 (fr)
EP (1) EP1028606B1 (fr)
JP (1) JP4514269B2 (fr)
KR (1) KR100632531B1 (fr)
CN (1) CN1166257C (fr)
AT (1) ATE291827T1 (fr)
CA (1) CA2297419C (fr)
DE (2) DE19905487A1 (fr)
TW (1) TW587407B (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003030595A1 (fr) * 2001-10-01 2003-04-10 Koninklijke Philips Electronics N.V. Circuit en pont auto-oscillant comprenant un circuit de demarrage
DE10235217A1 (de) * 2002-08-01 2004-02-19 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Schaltungsvorrichtung und Verfahren zum Betreiben einer Lampe
JP2004079331A (ja) * 2002-08-19 2004-03-11 Matsushita Electric Works Ltd 放電灯点灯装置
DE10343275A1 (de) 2003-09-18 2005-05-12 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum Erzeugen von Wechselspannung aus einer Gleichspannung
DE102004033377A1 (de) * 2004-07-09 2006-02-16 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Schaltungsanordnung mit einer schalterentlasteten Vollbrücke zum Betrieb von Lampen
DE102005058484A1 (de) * 2005-12-07 2007-06-14 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Schaltungsanordnung und Verfahren zum Betreiben mindestens einer LED
EP2140735B1 (fr) * 2007-04-23 2011-04-20 Osram Gesellschaft mit beschränkter Haftung Ensemble circuit servant à amorcer et à faire fonctionner au moins une lampe à décharge

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3611611A1 (de) * 1986-04-07 1987-10-08 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum hochfrequenten betrieb einer niederdruckentladungslampe
DE3623749A1 (de) * 1986-07-14 1988-01-21 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum betrieb von niederdruckentladungslampen
DE3829388A1 (de) * 1988-08-30 1990-03-01 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum betrieb einer last
DE4140557A1 (de) * 1991-12-09 1993-06-17 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum betrieb einer oder mehrerer niederdruckentladungslampen
DE4410492A1 (de) * 1994-03-25 1995-09-28 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Schaltungsanordnung zum Betrieb von Niederdruckentladungslampen

Also Published As

Publication number Publication date
TW587407B (en) 2004-05-11
US6259213B1 (en) 2001-07-10
DE19905487A1 (de) 2000-08-31
JP4514269B2 (ja) 2010-07-28
EP1028606A2 (fr) 2000-08-16
CA2297419C (fr) 2009-01-27
EP1028606A3 (fr) 2003-03-19
KR20010006628A (ko) 2001-01-26
ATE291827T1 (de) 2005-04-15
CA2297419A1 (fr) 2000-08-11
KR100632531B1 (ko) 2006-10-09
CN1263430A (zh) 2000-08-16
DE50009827D1 (de) 2005-04-28
JP2000235897A (ja) 2000-08-29
CN1166257C (zh) 2004-09-08

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