EP1732365A3 - Circuit and method for detecting the crest factor of a lamp current or a lamp voltage - Google Patents

Circuit and method for detecting the crest factor of a lamp current or a lamp voltage Download PDF

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Publication number
EP1732365A3
EP1732365A3 EP06011752A EP06011752A EP1732365A3 EP 1732365 A3 EP1732365 A3 EP 1732365A3 EP 06011752 A EP06011752 A EP 06011752A EP 06011752 A EP06011752 A EP 06011752A EP 1732365 A3 EP1732365 A3 EP 1732365A3
Authority
EP
European Patent Office
Prior art keywords
crest factor
detecting
lamp
circuit
relates
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Withdrawn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
EP06011752A
Other languages
German (de)
French (fr)
Other versions
EP1732365A2 (en
Inventor
Thomas Mudra
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 EP1732365A2 publication Critical patent/EP1732365A2/en
Publication of EP1732365A3 publication Critical patent/EP1732365A3/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2858—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the lamp against abnormal operating conditions
    • 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
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

Die Erfindung betrifft eine Schaltungsanordnung zum Erfassen eines Crestfaktors eines Lampenstroms oder einer Lampenbrennspannung einer elektrischen Lampe (2), wobei die Schaltungsanordnung eine erste Teilschaltung (15) aufweist, welche zum Bestimmen eines gemittelten Werts aus einem an die Schaltungsanordnung angelegten Eingangssignal ausgebildet ist, eine zweite Teilschaltung (16) aufweist, welche zum Bestimmen eines maximal zulässigen Werts aus dem an die Schaltungsanordnung angelegten Eingangssignal ausgebildet ist, und eine Vergleicherschaltung (17) aufweist, welche zum Erzeugen eines Vergleichssignals aus dem den gemittelten Wert charakterisierenden Ausgangssignal der ersten Teilschaltung (15) und einem den maximal zulässigen Crestfaktor charakterisierenden Ausgangssignal der zweiten Teilschaltung (16) ausgebildet ist. Die Erfindung betrifft auch ein Verfahren zum Erfassen eines derartigen Crestfaktors. Ein weiterer Aspekt der Erfindung betrifft ein elektronisches Vorschaltgerät (1), welches eine erfindungsgemäße Schaltungsanordnung (14a, 14b) aufweist. Darüber hinaus betrifft die Erfindung auch ein Verfahren zum Betreiben einer elektrischen Lampe, bei dem ein Crestfaktor gemäß einem erfindungsgemäßen Verfahren zum Erfassen des Crestfaktors durchgeführt wird.

Figure imgaf001
The invention relates to a circuit arrangement for detecting a crest factor of a lamp current or a lamp burning voltage of an electric lamp (2), the circuit arrangement having a first subcircuit (15) which is designed to determine an averaged value from an input signal applied to the circuit arrangement A subcircuit (16) adapted to determine a maximum allowable value from the input signal applied to the circuitry, and a comparator circuit (17) for generating a comparison signal from the averaged value characterizing output of the first subcircuit (15) and a maximum allowable crest factor characterizing output of the second sub-circuit (16) is formed. The invention also relates to a method for detecting such a crest factor. A further aspect of the invention relates to an electronic ballast (1) which has a circuit arrangement (14a, 14b) according to the invention. Moreover, the invention also relates to a method for operating an electric lamp, in which a crest factor is carried out according to a method according to the invention for detecting the crest factor.
Figure imgaf001
EP06011752A 2005-06-10 2006-06-07 Circuit and method for detecting the crest factor of a lamp current or a lamp voltage Withdrawn EP1732365A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005027012A DE102005027012A1 (en) 2005-06-10 2005-06-10 Circuit arrangement and method for detecting a crest factor of a lamp current or a lamp burning voltage of an electric lamp

Publications (2)

Publication Number Publication Date
EP1732365A2 EP1732365A2 (en) 2006-12-13
EP1732365A3 true EP1732365A3 (en) 2007-10-24

Family

ID=36992021

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06011752A Withdrawn EP1732365A3 (en) 2005-06-10 2006-06-07 Circuit and method for detecting the crest factor of a lamp current or a lamp voltage

Country Status (5)

Country Link
US (1) US7355356B2 (en)
EP (1) EP1732365A3 (en)
CN (1) CN1956617A (en)
CA (1) CA2549808A1 (en)
DE (1) DE102005027012A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008083855A1 (en) 2007-01-11 2008-07-17 Osram Gesellschaft mit beschränkter Haftung Method for determining a crest factor of a lamp current of an electric lamp
JP5380138B2 (en) * 2009-04-06 2014-01-08 本田技研工業株式会社 Grid interconnection inverter
DE102009023884A1 (en) * 2009-06-04 2011-01-27 Osram Gesellschaft mit beschränkter Haftung Electronic ballast and method for operating at least one discharge lamp

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3502983A (en) * 1968-11-20 1970-03-24 Bell Telephone Labor Inc Signal peak-to-average ratio detector
US5220276A (en) * 1991-06-11 1993-06-15 Keithley Corporation Crest factor measurement device
US5363020A (en) * 1993-02-05 1994-11-08 Systems And Service International, Inc. Electronic power controller
WO2000040058A1 (en) * 1998-12-29 2000-07-06 Koninklijke Philips Electronics N.V. Dimmable electronic ballast with single stage feedback inverter
WO2002019779A1 (en) * 2000-08-28 2002-03-07 Koninklijke Philips Electronics N.V. Circuit device
WO2004028206A2 (en) * 2002-09-19 2004-04-01 International Rectifier Corporation Adaptive cfl control circuit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1164819B1 (en) * 2000-06-15 2004-02-11 City University of Hong Kong Dimmable electronic ballast
JP4244747B2 (en) * 2002-11-08 2009-03-25 ウシオ電機株式会社 High pressure discharge lamp lighting device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3502983A (en) * 1968-11-20 1970-03-24 Bell Telephone Labor Inc Signal peak-to-average ratio detector
US5220276A (en) * 1991-06-11 1993-06-15 Keithley Corporation Crest factor measurement device
US5363020A (en) * 1993-02-05 1994-11-08 Systems And Service International, Inc. Electronic power controller
WO2000040058A1 (en) * 1998-12-29 2000-07-06 Koninklijke Philips Electronics N.V. Dimmable electronic ballast with single stage feedback inverter
WO2002019779A1 (en) * 2000-08-28 2002-03-07 Koninklijke Philips Electronics N.V. Circuit device
WO2004028206A2 (en) * 2002-09-19 2004-04-01 International Rectifier Corporation Adaptive cfl control circuit

Also Published As

Publication number Publication date
US7355356B2 (en) 2008-04-08
US20060279231A1 (en) 2006-12-14
DE102005027012A1 (en) 2006-12-14
CN1956617A (en) 2007-05-02
EP1732365A2 (en) 2006-12-13
CA2549808A1 (en) 2006-12-10

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