EP0429028A2 - Ballast pour plusieurs lampes à décharge - Google Patents

Ballast pour plusieurs lampes à décharge Download PDF

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Publication number
EP0429028A2
EP0429028A2 EP90121991A EP90121991A EP0429028A2 EP 0429028 A2 EP0429028 A2 EP 0429028A2 EP 90121991 A EP90121991 A EP 90121991A EP 90121991 A EP90121991 A EP 90121991A EP 0429028 A2 EP0429028 A2 EP 0429028A2
Authority
EP
European Patent Office
Prior art keywords
voltage
lamp
ballast
supplied
discharge lamps
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.)
Ceased
Application number
EP90121991A
Other languages
German (de)
English (en)
Other versions
EP0429028A3 (en
Inventor
Fred Dr.-Ing. Hasemann
Ferdinand Dipl.-Ing. Mertens
Norbert Dipl.-Ing. Wittig
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.)
Trilux GmbH and Co KG
Original Assignee
Trilux Lenze GmbH and Co KG
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 Trilux Lenze GmbH and Co KG filed Critical Trilux Lenze GmbH and Co KG
Publication of EP0429028A2 publication Critical patent/EP0429028A2/fr
Publication of EP0429028A3 publication Critical patent/EP0429028A3/de
Ceased 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
    • H05B41/36—Controlling

Definitions

  • the invention relates to a ballast of the type specified in the preamble of claim 1.
  • Discharge lamps such as fluorescent lamps, require a ballast which generates the operating voltage required for the operation of the discharge lamps from the mains voltage and which also enables the discharge lamps to be ignited and, if appropriate, the lamp electrodes to be preheated.
  • each discharge lamp has its own ballast, but ballasts are also known with which several discharge lamps can be operated simultaneously.
  • Ballasts of this type have an operating section in which a separate lamp circuit is provided for each discharge lamp and, in addition to the electrode connections between which the lamp is inserted, contains a separate inductance for each lamp, which generates the high voltages required for lamp ignition during the ignition phase.
  • Ballasts of this type which are intended for the simultaneous operation of a plurality of discharge lamps are, however, can only be operated in such a way that either all connected discharge lamps are switched on or switched off. It is therefore not possible to switch an individual discharge lamp or a group of discharge lamps on or off independently of the other discharge lamps connected to the ballast.
  • the invention has for its object to provide a ballast of the type specified in the preamble of claim 1, which enables individual discharge lamps or groups of discharge lamps to be switched on and off separately without the other discharge lamps operated with the ballast being influenced thereby.
  • the operating part can be switched on via several external switches, a decoupling element being connected between each external switch and the operating part.
  • the decoupling elements have the effect that the mains voltage applied via the external switch is transmitted to the operating part, but that there is no reaction from one switch to the other switch.
  • a detector is assigned to each decoupling element, which only responds when the switch assigned to this decoupling element is switched on.
  • Each detector controls a switching element which is contained in the lamp circuit assigned to this detector, so that this lamp circuit is only closed when the detector responds or when the latter responds External switch associated with the detector is closed.
  • the operating part can be supplied with voltage via each of the several external switches, but that only the lamp circuit of the discharge lamp (s) which is assigned to the switch which was switched on is closed. The remaining discharge lamps remain switched off. Although there is only one operating part for all lamps, each lamp or group of lamps can be switched on and off separately. This leads to a reduction in the expenditure on ballasts and to an increase in the possibilities of switching individual lamps or lamp groups separately. If more than one external switch is switched on, the operating part is connected to the mains voltage via a plurality of external switches, the greatest amplitude of the different mains voltages always being transmitted to the operating part. It is not absolutely necessary that all switches are connected to the same phase of the mains voltage. With a three-phase network, the external switches can also be connected to different network phases.
  • ballast In the drawing, a circuit diagram of the ballast is shown schematically.
  • the input of the ballast 10 has an input connection 11 which can be connected to a connection of the mains voltage, for example the neutral conductor N, and also a plurality of further connections 12, 13, each of which is connected to an external switch S1, S2 can be, which can be a normal light switch.
  • the connections S1 and S2 on the input side are connected to a phase line P of the supply network.
  • connections 11 and 12 are connected to the input connections of a full-wave rectifier G1, the output connections of which are connected to the input lines 14, 15 of the operating part BT.
  • the connections 11 and 13 are connected to the input connections of a full-wave rectifier G2, the output connections of which are also connected to the input lines 14, 15 of the operating part BT.
  • a capacitor 16 is connected between the input lines 14, 15.
  • a detector D1 is connected between the connections 11 and 12, which detects whether the switch S1 is closed or whether the mains voltage is present at the connections 11, 12.
  • This detector D1 is the photodiode of an optocoupler D1, T1.
  • a detector D2 is connected between the terminals 11 and 13, which is the photodiode of an optocoupler D2, T2.
  • the full-wave rectifiers G1 and G2 are decoupling elements.
  • the switch S1 When the switch S1 is closed, the mains voltage only reaches the detector D1, but the decoupling elements prevent the mains voltage from reaching the detector D2 when the switch S2 is open. It only addresses the detector whose associated external switch is closed.
  • each decoupling element supplies its output voltage to the input lines 14 and 15 of the operating part BT.
  • the operating part BT contains a DC voltage generator GSP, which generates a continuous DC voltage of a predetermined amplitude from the pulsating DC voltage which is present on the input lines 14 and 15, which is generally greater than the peak amplitude of the mains voltage.
  • DC voltage generators are known as step-up converters or as inverse regulators and are therefore not described in detail.
  • An inverter 17 is connected to the output of the DC voltage generator GSP and contains two series-connected electronic switches 18, 19 which are controlled by a control circuit 20 in such a way that they are mutually switched on, i. that one of the switches is always on while the other is off.
  • the electronic switches 18, 19 are switched over at a frequency which is above 20 kHz.
  • the lamp circuits LK1 and LK2 of the discharge lamps, which are fluorescent lamps LL1 and LL2, are connected to the connection point of the switches 18 and 19 via a capacitor 21.
  • the lamp circuit LK1 contains in series an inductor L1 connected to the capacitor 21, the fluorescent lamp LL1 and the switching element T1, which is the bidirectional switch of the optocoupler D1, T1.
  • the switching element T1 is connected to one pole of the DC voltage generated by the DC voltage generator GSP.
  • a fluorescent lamp contains two electrodes E1 and E2, each of which has two ends which are connected to the electrode connections 22, 23 and 24, 25 of the ballast.
  • the elec electrode connections 22 and 24 are the voltage-supplied electrode connections, that is to say those electrode connections via which the electrodes E1 and E2 are supplied with voltage.
  • the electrode connections 23 and 25 facing away from the voltage-supplied electrode connections 22, 24 are connected to a control circuit 26.
  • the switching element T1 is in series with the voltage-supplied electrode connection 24, which faces away from the associated inductance L1 and via which the electrode E2 is connected to the one pole of the generator voltage U g supplied by the inverter 17.
  • the lamp circuit LK2 of the fluorescent lamp LL2 also contains an inductor L2, which connects the electrode E1 to one pole of the generator voltage U g , and a switching element T2, which connects the other electrode E2 to the other pole of the generator voltage U g .
  • the electrode connections facing away from the voltage-supplied electrode connections are connected to the control circuit 26.
  • the described ballast works as follows: If the external switch S1 is closed while the external switch S2 remains open, the full-wave rectifier G1 is supplied with AC voltage and it generates the supply voltage on the input lines 14 and 15 of the operating part BT. At the same time, detector D1 is energized, while detector D2 remains de-energized. When the detector D1 is energized, the switch T1 is closed, as a result of which the lamp circuit LK1 is closed, while the lamp circuit LK2 remains open because the switch T2 continues to interrupt this lamp circuit.
  • the control circuit 26 first short-circuits the electrode connections 23 and 25 facing away from the generator voltage of all fluorescent lamps, so that in the case of those fluorescent lamps whose switches T1 or T2 are closed, the preheating phase begins, in which the electrodes E1 and E2 can be preheated. After a predetermined duration of the preheating phase, the control circuit 26 generates a predetermined number of burst pulses in an ignition phase, in which the relevant electrode connections 23 and 25 are alternately short-circuited and disconnected. As a result of the interruption of the electrode current, a high ignition voltage is generated at the associated inductance L1. After the ignition phase has ended, the operating phase is initiated in which the control circuit permanently interrupts the connection between the electrode connections 23 and 25.
  • the control circuit 26 is connected to the control circuit 20 of the inverter 17 via a line 27.
  • the control circuit 20 generates a relatively low operating frequency of the inverter 17 of slightly above 20 kHz.
  • the control circuit 20 generates a higher operating frequency of the inverter 17 of approximately 35 kHz.
  • the control circuit 26 synchronously effects the same control for all connected fluorescent lamps, but only those fluorescent lamps react in which the switching element T1 or T2 is closed.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
EP19900121991 1989-11-22 1990-11-17 Ballast for a plurality of discharge lamps Ceased EP0429028A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3938676 1989-11-22
DE3938676A DE3938676C1 (fr) 1989-11-22 1989-11-22

Publications (2)

Publication Number Publication Date
EP0429028A2 true EP0429028A2 (fr) 1991-05-29
EP0429028A3 EP0429028A3 (en) 1992-07-22

Family

ID=6393957

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900121991 Ceased EP0429028A3 (en) 1989-11-22 1990-11-17 Ballast for a plurality of discharge lamps

Country Status (4)

Country Link
US (1) US5079485A (fr)
EP (1) EP0429028A3 (fr)
CA (1) CA2025094A1 (fr)
DE (1) DE3938676C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0871103A1 (fr) * 1997-04-11 1998-10-14 TRILUX-LENZE GmbH & Co. KG Appareil de commande d'éclairage
EP0871105A1 (fr) * 1997-04-12 1998-10-14 TRILUX-LENZE GmbH & Co. KG Système d'éclairage

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5371442A (en) * 1993-01-04 1994-12-06 Siems; Steven L. Remote ballast circuit assembly
US6483260B1 (en) * 2001-07-23 2002-11-19 Hubbell Incorporated Apparatus for operating respective single lamps among multiple lamps coupled to the same ballast
US6731080B2 (en) 2002-06-28 2004-05-04 Hubbell Incorporated Multiple ballast and lamp control system for selectively varying operation of ballasts to distribute burn times among lamps
JP2008211946A (ja) * 2007-02-28 2008-09-11 Sanden Corp 電力変換装置
CN100521066C (zh) * 2007-06-28 2009-07-29 杨根元 一种高效节能的长寿命荧光灯
RU2711235C2 (ru) 2015-03-26 2020-01-15 Филипс Лайтинг Холдинг Б.В. Схема возбудителя светоизлучающих диодов, осветительное устройство и способ возбуждения

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4260932A (en) * 1978-10-12 1981-04-07 Vance Johnson Method and circuit for facilitating the starting and steady state flickerless operation of a discharge lamp
US4484105A (en) * 1982-10-28 1984-11-20 At&T Technologies, Inc. Circuit for selectively exciting one of a pair of light emitting diodes
EP0298934A1 (fr) * 1987-07-09 1989-01-11 Kabushiki Kaisha Denkosha Dispositif d'éclairage

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2859387A (en) * 1953-07-30 1958-11-04 Zeiss Ikon Ag Arrangement for simultaneously or alternately operating a plurality of xenon high pressure lamps
DE1040689B (de) * 1955-01-19 1958-10-09 Siemens Ag Beleuchtungsanlage mit wechselstromgespeisten Leuchtstofflampen
DE2816943C2 (de) * 1978-04-19 1982-09-02 Ceag Licht- Und Stromversorgungstechnik Gmbh, 4770 Soest Verfahren zum Betrieb von Notstromversorgungseinrichtungen
US4247766A (en) * 1979-01-12 1981-01-27 Carl Warren Demand illumination control apparatus
US4238711A (en) * 1979-08-20 1980-12-09 General Electric Company Circuit for selective individual operation of multiple arc discharge lamps
GB2069779A (en) * 1980-02-08 1981-08-26 Thorn Emi Ltd Discharge lamp circuit
JPS63198294A (ja) * 1987-02-10 1988-08-16 シャープ株式会社 蛍光灯の点灯方式

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4260932A (en) * 1978-10-12 1981-04-07 Vance Johnson Method and circuit for facilitating the starting and steady state flickerless operation of a discharge lamp
US4484105A (en) * 1982-10-28 1984-11-20 At&T Technologies, Inc. Circuit for selectively exciting one of a pair of light emitting diodes
EP0298934A1 (fr) * 1987-07-09 1989-01-11 Kabushiki Kaisha Denkosha Dispositif d'éclairage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0871103A1 (fr) * 1997-04-11 1998-10-14 TRILUX-LENZE GmbH & Co. KG Appareil de commande d'éclairage
EP0871105A1 (fr) * 1997-04-12 1998-10-14 TRILUX-LENZE GmbH & Co. KG Système d'éclairage

Also Published As

Publication number Publication date
US5079485A (en) 1992-01-07
EP0429028A3 (en) 1992-07-22
CA2025094A1 (fr) 1991-05-23
DE3938676C1 (fr) 1991-06-06

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