DE4330942C2 - Method for detecting a defective fluorescent lamp when operating with a higher frequency voltage - Google Patents
Method for detecting a defective fluorescent lamp when operating with a higher frequency voltageInfo
- Publication number
- DE4330942C2 DE4330942C2 DE4330942A DE4330942A DE4330942C2 DE 4330942 C2 DE4330942 C2 DE 4330942C2 DE 4330942 A DE4330942 A DE 4330942A DE 4330942 A DE4330942 A DE 4330942A DE 4330942 C2 DE4330942 C2 DE 4330942C2
- Authority
- DE
- Germany
- Prior art keywords
- lamp
- fluorescent lamp
- operating
- detecting
- current
- 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 - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/006—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for non-insulated low-voltage distribution systems, e.g. low-voltage halogen-lamp system
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- 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
- H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
-
- 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
- H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
- H05B39/04—Controlling
- H05B39/041—Controlling the light-intensity of the source
- H05B39/044—Controlling the light-intensity of the source continuously
- H05B39/045—Controlling the light-intensity of the source continuously with high-frequency bridge 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
- H05B41/282—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
- H05B41/2851—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
- H05B41/2855—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp 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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/20—Responsive to malfunctions or to light source life; for protection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/093—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current with timing means
-
- 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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/20—Responsive to malfunctions or to light source life; for protection
- H05B47/25—Circuit arrangements for protecting against overcurrent
Description
Die vorliegende Erfindung betrifft ein Verfahren zum Erkennen einer defekten Leuchtstofflampe bei Betrieb mit höherfrequenter Spannung.The present invention relates to a method for recognition a defective fluorescent lamp when operating with higher frequency voltage.
Leuchtstofflampen werden wegen der höheren Lichtausbeute und dem größeren Wirkungsgrad des gesamten zum Betrieb notwendigen Systems zunehmend mit elektronischen Vorschaltgeräten betrie ben, die einen hochfrequenten Betriebsstrom bereitstellen.Fluorescent lamps are used because of the higher light output and the greater efficiency of everything necessary for operation Systems increasingly operated with electronic ballasts ben that provide a high-frequency operating current.
Die physikalische Ursache für die erhöhte Lichtausbeute liegt unter anderem darin, daß mit zunehmender Betriebsfrequenz der Ionisationszustand in der Leuchtstofflampe nicht nach jedem Nulldurchgang des Lampenstroms wieder aufgebaut werden muß, wie dies beim Betrieb mit Netzfrequenz der Fall ist.The physical reason for the increased light output is inter alia in that with increasing operating frequency the Ionization state in the fluorescent lamp not after everyone Zero crossing of the lamp current must be rebuilt, like this is the case when operating at mains frequency.
Bekannt ist, daß die Brennspannung einer Leuchtstofflampe beim 50 Hz-Betrieb Spannungsspitzen besitzt, die aufzeigen, daß die Lampe nach jedem Nulldurchgang wieder gezündet werden muß. Diese Wiederzündspitzen fehlen beim Betrieb mit höheren Frequenzen. Die Lampe brennt hierbei mit der meist sinusförmigen Brennspannung.It is known that the burning voltage of a fluorescent lamp has voltage peaks during 50 Hz operation, which show that the lamp must be switched on again after each zero crossing. These re-ignition peaks are absent when operating with higher ones Frequencies. The lamp burns with the most sinusoidal operating voltage.
Weiterhin ist bekannt, daß Leuchtstofflampen am Ende ihrer Lebensdauer unzuverlässig zünden und teilweise stochastisch leuchten. Dieses sogenannte Flackern wird als störend empfunden, so daß die entsprechende Röhre getauscht oder abgeschaltet werden muß.It is also known that fluorescent lamps at the end of their Ignite lifespan unreliably and sometimes stochastically to shine. This so-called flickering is considered distracting felt so that the corresponding tube exchanged or must be switched off.
In der US-PS 4.853.599 wird ein Verfahren zum Erkennen einer defekten Hochdruck-Entladungslampe beschrieben, bei dem im Fehlerfall auftretende Einbrüche des Lampenstromes von einer Auswerteschaltung gezählt und bei Überschreiten einer definierten Anzahl ein Relais zur Lampenabschaltung angesteuert wird. Ein definiertes Zeitfenster für die Zählung ist hierbei nicht vorgesehen. US Pat. No. 4,853,599 describes a method for recognizing a Defective high-pressure discharge lamp described, in which Incidents in lamp current drops from one Evaluation circuit counted and if one is exceeded controlled number of relays for lamp shutdown becomes. There is a defined time window for the count not provided.
In der gattungsbildenden DE 40 39 161 A1 wird über eine Vielzahl von Meßgrößen, die über eine entsprechende Steuer- und Regeleinrichtung, sowie über eine entsprechende Sende- und Empfangseinrichtung verarbeitet werden, erreicht, daß eine komfortable Helligkeitsregelung für Leuchtstoffröhren ermöglicht wird und gleichzeitig optimale Bedingungen für den Betrieb der Lampen gegeben sind. Auf die Zündunwilligkeit von Lampen wird nach einer definierten Zeit von Zündversuchen mit der Verringerung der Lampenspannung auf ungefährliche Werte, das heißt mit praktischer Abschaltung reagiert. Dabei wird nicht der Amplitudenverlauf der hochfrequenten Ansteuerung beurteilt, welcher Rückschlüsse auf die Brauchbarkeit der Leuchtstofflampe ermöglicht.In the generic DE 40 39 161 A1, a large number of measured variables, which via a corresponding control and regulating device, as well via a corresponding transmitting and receiving device processed, achieved a comfortable Brightness control for fluorescent tubes is made possible and at the same time optimal conditions for the operation of the lamps given are. The reluctance to ignite of lamps is followed a defined time of ignition attempts with the reduction the lamp voltage to harmless values, i.e. with practical shutdown reacts. It is not the Amplitude course of the high-frequency control is assessed, what conclusions about the usability of the fluorescent lamp enables.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zu realisieren, das es ermöglicht, eine Leuchtstofflampe dahingehend zu überwachen, daß sie bei Alterung nicht den Zustand einer als unruhig oder flackernd empfundenen Lichtabgabe erreicht.The invention is based on the object of a method realize that enables a fluorescent lamp to monitor that they do not age when they age Condition of someone who feels uneasy or flickering Light emission reached.
Erfindungsgemäß wird diese Aufgabe durch die im Patentan spruch 1 aufgeführten Merkmale gelöst.According to the invention this object is achieved by the patent pronounced 1 solved characteristics.
Vorteilhafte Ausgestaltungen sind in den Patentansprüchen 2 bis 4 angegeben.Advantageous embodiments are in claims 2 to 4 specified.
Als Kriterium für die Alterung der Leuchtstofflampe werden kurzzeitige Stromspitzen des über einen Fühlwiderstand detektierten Lampenstroms benutzt, die in jeder Halbwelle des HF-förmigen Versorgungsstroms auftreten.As a criterion for the aging of the fluorescent lamp, brief current peaks of the over uses a sensing resistance of the detected lamp current, which in occur every half-wave of the RF-shaped supply current.
Diese Stromspitzen deuten auf den nachlassenden Ionisierungs zustand bei verbrauchten Leuchtstofflampen hin.These current peaks indicate a decrease in ionization condition with used fluorescent lamps.
Sie treten unter normalen Betriebsbedingungen nur bei völlig verbrauchten Leuchtstofflampen auf, die in einer herkömmlichen Schaltung mit Netzfrequenzbetrieb schon nicht mehr zünden. They only occur fully under normal operating conditions used fluorescent lamps in a conventional No longer ignite circuit with mains frequency operation.
Mit der erfindungsgemäßen Lösung werden die Zustände der Lampe, die zwangsläufig zu dem genannten Flackern führen, erkannt und die Lampe kann automatisch abgeschaltet werden bevor dieser störende Effekt einsetzt.With the solution according to the invention, the states of the Lamp, which inevitably lead to the mentioned flickering, recognized and the lamp can be switched off automatically before this disruptive effect.
Eine verbrauchte Lampe weist auch im hochfrequenten Betrieb einen nicht exakt sinusförmigen Brennspannungsverlauf auf.A used lamp also shows in high-frequency operation a not exactly sinusoidal operating voltage curve.
Durch Detektierung des zugehörigen Brennstromes lassen sich eindeutige Kriterien für diesen Zustand am Lebensende der Lampe ermitteln.By detecting the associated combustion current clear criteria for this condition at the end of life of the lamp determine.
Zusätzlich kann als weiterer für die Lampe schädlicher Betriebszustand ein zu großer Lampenstrom erkannt werden.It can also be more harmful to the lamp Operating condition too large lamp current can be detected.
Die erfindungsgemäße Art der Fehlererfassung ermöglicht die Unterscheidung zwischen zufälligen Störgrößen, anlaufbedingtem höheren Lampenstrom und fehlerhaft impulsbehaftetem Lampenstrom, wie er bei verbrauchten Leuchtstofflampen auftritt. Dieses Verfahren stellt sicher, daß ein einmaliges bzw. durch den Startvorgang einer Leuchtstofflampe zeitweilig bedingtes Fehlersignal negiert wird.The type of error detection according to the invention enables Differentiation between random disturbance variables, start-up-related higher lamp current and faulty impulses Lamp current, as in the case of used fluorescent lamps occurs. This procedure ensures that a one time or temporarily by starting a fluorescent lamp conditional error signal is negated.
Das Verfahren zum Erkennen einer defekten Leuchtstofflampe bei hochfrequenter Ansteuerung wird am nachfolgenden Ausführungsbeispiel mit zugehörigem Blockschaltbild (Fig. 1) erläutert.The method for detecting a defective fluorescent lamp with high-frequency control is explained in the following exemplary embodiment with the associated block diagram ( FIG. 1).
Das Fehlersignal 1 besteht aus Stromspitzen, die sich mit der Betriebsfrequenz wiederholen und beim Überschreiten der Schalt schwelle 2 den Komperator 3 zum Umschalten bringen.The error signal 1 consists of current peaks that repeat with the operating frequency and bring the comparator 3 to switch when the switching threshold 2 is exceeded.
Diese Umschaltsignale werden zyklisch im Zähler 4 gezählt und beim Erreichen eines bestimmten vorgegebenen Zählerstandes wird das erste Register 5 gesetzt. Mit einem erstmaligen Setzen des ersten Registers 5 wird ausgehend von der Zeitbasis 6 eine Zeitverzögerung 7 gestartet.These changeover signals are counted cyclically in the counter 4 and when a certain predetermined counter reading is reached, the first register 5 is set. When the first register 5 is set for the first time, a time delay 7 is started based on the time base 6 .
Liegt nach Ablauf dieser Verzögerung wiederum ein über ein Fehlersignal erneut gesetztes erstes Register 5 vor, wird ein zweites Register 8 gesetzt, über dessen Auswertung auf das Fehlersignal reagiert werden kann.If, after this delay has elapsed, a first register 5 is again set via an error signal, a second register 8 is set, via the evaluation of which it is possible to react to the error signal.
Claims (4)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4330942A DE4330942C2 (en) | 1993-09-08 | 1993-09-08 | Method for detecting a defective fluorescent lamp when operating with a higher frequency voltage |
DE4423766A DE4423766A1 (en) | 1993-09-08 | 1994-06-29 | Discriminating between short-circuit current and cold starting current when operating LV lamp |
EP94250220A EP0642296A3 (en) | 1993-09-08 | 1994-09-07 | Process for detecting a faulty fluorescent lamp operated by high-frequency. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4330942A DE4330942C2 (en) | 1993-09-08 | 1993-09-08 | Method for detecting a defective fluorescent lamp when operating with a higher frequency voltage |
DE4423766A DE4423766A1 (en) | 1993-09-08 | 1994-06-29 | Discriminating between short-circuit current and cold starting current when operating LV lamp |
Publications (2)
Publication Number | Publication Date |
---|---|
DE4330942A1 DE4330942A1 (en) | 1995-03-23 |
DE4330942C2 true DE4330942C2 (en) | 1997-05-22 |
Family
ID=25929475
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE4330942A Expired - Fee Related DE4330942C2 (en) | 1993-09-08 | 1993-09-08 | Method for detecting a defective fluorescent lamp when operating with a higher frequency voltage |
DE4423766A Withdrawn DE4423766A1 (en) | 1993-09-08 | 1994-06-29 | Discriminating between short-circuit current and cold starting current when operating LV lamp |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE4423766A Withdrawn DE4423766A1 (en) | 1993-09-08 | 1994-06-29 | Discriminating between short-circuit current and cold starting current when operating LV lamp |
Country Status (1)
Country | Link |
---|---|
DE (2) | DE4330942C2 (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4853599A (en) * | 1988-02-11 | 1989-08-01 | Fl Industries, Inc. | Cycling limiting circuitry and method for electrical apparatus |
DE4039161C2 (en) * | 1990-12-07 | 2001-05-31 | Zumtobel Ag Dornbirn | System for controlling the brightness and operating behavior of fluorescent lamps |
-
1993
- 1993-09-08 DE DE4330942A patent/DE4330942C2/en not_active Expired - Fee Related
-
1994
- 1994-06-29 DE DE4423766A patent/DE4423766A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
DE4423766A1 (en) | 1996-01-04 |
DE4330942A1 (en) | 1995-03-23 |
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Legal Events
Date | Code | Title | Description |
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8339 | Ceased/non-payment of the annual fee |