EP1133215A2 - Verfahren und Schaltung zum Zünden einer Hochdruckentladungslampe - Google Patents

Verfahren und Schaltung zum Zünden einer Hochdruckentladungslampe Download PDF

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Publication number
EP1133215A2
EP1133215A2 EP01660040A EP01660040A EP1133215A2 EP 1133215 A2 EP1133215 A2 EP 1133215A2 EP 01660040 A EP01660040 A EP 01660040A EP 01660040 A EP01660040 A EP 01660040A EP 1133215 A2 EP1133215 A2 EP 1133215A2
Authority
EP
European Patent Office
Prior art keywords
lamp
switch
ignition
current
circuit
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.)
Withdrawn
Application number
EP01660040A
Other languages
English (en)
French (fr)
Other versions
EP1133215A3 (de
Inventor
Teijo Viljanen
Jukka Luomala
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.)
Helvar Oy AB
Original Assignee
Helvar Oy AB
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 Helvar Oy AB filed Critical Helvar Oy AB
Publication of EP1133215A2 publication Critical patent/EP1133215A2/de
Publication of EP1133215A3 publication Critical patent/EP1133215A3/de
Withdrawn legal-status Critical Current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
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H05B41/042—Starting switches using semiconductor devices
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/288—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • H05B41/292—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2921—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2925—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating conditions

Definitions

  • the invention relates to a method for switching a high pressure lamp on and off with an ignition circuit, comprising
  • the invention relates also to an ignition circuit for carrying out the method.
  • High pressure lamps such as high-pressure sodium and metal halide lamps, must be switched on with voltage pulses substantially higher than mains voltage, typically within the voltage range of 1,0 kV - 5 kV. High pressure lamps are most commonly used in street lighting and indoors in industrial buildings.
  • a problem in switching on some high pressure lamps is that the extinguished hot lamp does not ignite sufficiently fast but remains in an abnormal status of gas discharge, in which the lamp cannot be switched on with normal ignition pulses unless it is allowed to cool in the meantime. This is a common occurrence, e.g. when re-ignition of a lamp still excessively hot is attempted with normal ignition pulses.
  • the problem can be avoided by spacing ignition attempts in an effort to reduce the amount of heat generated by ignition attempts. For example, it is possible to use a timer for controlling ignition attempts to repeat the same e.g. for 5 seconds only, followed by a pause of e.g. 1 minute for the lamp to cool down. This type of timer-controlled ignition has been described e.g. in published applications WO 97/08920 and WO 97/08921. These prior known ignition circuits do not function as an active extinguisher for a lamp or its status of gas discharge.
  • a power source 8 comprises a mains-frequency alternating current, which is connected over load circuit lines 11, 12 to a lamp L.
  • the lamp current is restricted by means of a ballast Lk.
  • the ballast Lk has its inductive load compensated for by a capacitor Ck.
  • An ignition circuit 10 comprises a pulse transformer, the lamp current passing through its secondary winding 2.
  • the secondary winding 2 is connected in series with the ballast Lk.
  • a switch 3 is connected in series with a primary winding 1 of the pulse transformer, and a pulse capacitor 4 is connected in parallel with the series connection established by the switch 3 and the primary winding 1.
  • the controlled opening and closing of the switch 3 is effected by means of a control device 5, e.g. a microprocessor.
  • a controlled closing of the switch 3 develops ignition voltage pulses in the secondary winding 2 as the charge of the capacitor 4 oscillates in an oscillating circuit established by the capacitor 4 and the primary winding 1.
  • the controlled closing cycles of the switch 3 for ignition pulses are short compared e.g. to the half-cycle of mains power.
  • the duration of a single ignition pulse can be e.g. two micro-seconds, and a multitude of ignition pulses develop during a single half-cycle.
  • the pulse transformer 1, 2 may have a ratio of revolutions which is e.g. 5/80.
  • the secondary winding 2 and the primary winding 1 of a pulse transformer associated with the load current line 11 have confluent ends thereof connected to the second load current line 12 by way of the capacitor 4.
  • the primary winding 1 has its free end also connected to the second load current line 12 by way of the switch 3.
  • the microprocessor 5 is coupled to receive a control message from a lamp current measuring element 6 and/or a load circuit voltage measurement 7.
  • the cited measuring sites 6 and 7 are but examples, and the location thereof may vary relative to the lamp L and the pulse transformer 2.
  • the current measuring element 6 may be e.g. a shunt resistance (a strip of foil), a current transformer or a Hall element.
  • This circuitry makes it possible that, with a controlled closing of the switch 3 conductively for an extended period of time (1-2 seconds), the ballast Lk will be subjected to a through-going short-circuit current for the load circuit, whereby the lamp voltage falls to such a low level that the lamp L is turned off.
  • This turn-off function can happen both to a normally burning lamp and to a lamp left in an abnormal state of gas discharge at a failed ignition attempt, whereby the lamp does not remain in the state of gas discharge but goes out, and ignition attempts can be repeated more quickly.
  • the inventive ignition circuit is used for monitoring the DC component of a lamp current by means of the lamp-current measuring device 6 and/or the lamp voltage measurement 7.
  • the DC component is visible across the capacitor 4 as the voltage measurement is performed in front of the pulse transformer winding 2.
  • the level of the DC component is discovered by simultaneously sensing the current passing in the winding 2.
  • the control device 5 When extinguishing a lamp by means of the current measurement 6 and/or the voltage measurement 7, the control device 5 effects a controlled opening of the switch 3 during a zero current after the load circuit has been short circuited for 1-2 seconds for turning off the lamp L or for extinguishing its abnormal status of gas discharge for the lamp to cool down.
  • the extinguishing status is terminated by opening the switch during a zero circuit in order to avoid extra voltage peaks in the circuitry.
  • An intelligent control device constituted by the microprocessor 5 can also be exploited in a manner which is novel in this type of igniters.
  • the intelligent control device 5 can be programmed to collect in its memory status data for a lamp (history log) and to transmit its status data to a receiver as requested. Transmission can be effected e.g. over a twin wire or by an infrared or radio signal.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
EP01660040A 2000-03-06 2001-03-02 Verfahren und Schaltung zum Zünden einer Hochdruckentladungslampe Withdrawn EP1133215A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20000505 2000-03-06
FI20000505A FI107578B (fi) 2000-03-06 2000-03-06 Menetelmä ja sytytyspiiri suurpainelampun sytyttämiseksi ja sammuttamiseksi

Publications (2)

Publication Number Publication Date
EP1133215A2 true EP1133215A2 (de) 2001-09-12
EP1133215A3 EP1133215A3 (de) 2004-01-07

Family

ID=8557847

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01660040A Withdrawn EP1133215A3 (de) 2000-03-06 2001-03-02 Verfahren und Schaltung zum Zünden einer Hochdruckentladungslampe

Country Status (2)

Country Link
EP (1) EP1133215A3 (de)
FI (1) FI107578B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004032579A1 (en) * 2002-10-02 2004-04-15 Power Electronics Ltd Discharge lighting bulbs control system
EP1686837A1 (de) * 2005-01-28 2006-08-02 TTE Germany GmbH Zündschaltung und Vorschaltgerät für eine Entladungslampe hoher Intensität
DE102008004787A1 (de) * 2008-01-17 2009-07-23 Bag Electronics Gmbh Zündgerät mit zwei Eingangspolen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997008921A1 (de) * 1995-08-28 1997-03-06 Tridonic Bauelemente Gmbh Zündschaltung für eine hochdruck-gasentladungslampe
US5962988A (en) * 1995-11-02 1999-10-05 Hubbell Incorporated Multi-voltage ballast and dimming circuits for a lamp drive voltage transformation and ballasting system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997008921A1 (de) * 1995-08-28 1997-03-06 Tridonic Bauelemente Gmbh Zündschaltung für eine hochdruck-gasentladungslampe
US5962988A (en) * 1995-11-02 1999-10-05 Hubbell Incorporated Multi-voltage ballast and dimming circuits for a lamp drive voltage transformation and ballasting system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004032579A1 (en) * 2002-10-02 2004-04-15 Power Electronics Ltd Discharge lighting bulbs control system
EP1686837A1 (de) * 2005-01-28 2006-08-02 TTE Germany GmbH Zündschaltung und Vorschaltgerät für eine Entladungslampe hoher Intensität
DE102008004787A1 (de) * 2008-01-17 2009-07-23 Bag Electronics Gmbh Zündgerät mit zwei Eingangspolen
US8330396B2 (en) 2008-01-17 2012-12-11 Bag Electronics Gmbh Starting device with two input poles

Also Published As

Publication number Publication date
EP1133215A3 (de) 2004-01-07
FI107578B (fi) 2001-08-31
FI20000505A0 (fi) 2000-03-06

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