EP1194016A2 - EVG für Gasentladungslampen mit Phasen-Detektion - Google Patents
EVG für Gasentladungslampen mit Phasen-Detektion Download PDFInfo
- Publication number
- EP1194016A2 EP1194016A2 EP01119853A EP01119853A EP1194016A2 EP 1194016 A2 EP1194016 A2 EP 1194016A2 EP 01119853 A EP01119853 A EP 01119853A EP 01119853 A EP01119853 A EP 01119853A EP 1194016 A2 EP1194016 A2 EP 1194016A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- operating device
- voltage
- load circuit
- current
- phase
- 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- Withdrawn
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/56—One or more circuit elements structurally associated with the lamp
-
- 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
- H05B41/295—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 with preheating electrodes, e.g. for fluorescent lamps
- H05B41/298—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2981—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
- H05B41/2985—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 an operating device for one or more low-pressure discharge lamps with spirals. It is in particular a Circuit that detects the breakage of a filament of a lamp and the control gear off.
- the service life of a low-pressure discharge lamp equipped with filaments is primarily determined by the life of the filaments.
- the lamp voltage When the coils are used up, there is an increase first the lamp voltage accompanied by an undesirable increase in temperature in the filament area of the lamp.
- the lamp also mostly shows a rectifying effect at this stage. Finally it breaks Filament, leading to the destruction of the lamp control gear and a dangerous Overheating of the lamp ends can result.
- some shutdown devices known:
- the object of the present invention is a potential-free evaluation the current through the resonance capacitor for the purpose of shutdown to provide the control gear in the event of a spiral breakage as inexpensively as possible.
- the control gear usually contains an AC voltage generator that feeds energy into the load circuit.
- An AC voltage generator that feeds energy into the load circuit.
- FIG. 1 The series connection of the lamp inductor L1 and the lamp Lp is connected to the two terminals of the AC voltage generator G.
- a spiral connection is used to connect the lamp Lp.
- the resonance capacitor C1 is connected to the other spiral connection. If the lamp is described by an equivalent load resistor R1, the following expression results for the load circuit impedance Z depending on the complex frequency s:
- Z ( s ) R 1 + sL 1 + s 2 L 1 C 1 R 1 1 + sC 1 R 1
- the parameter is the resonance capacitor C1.
- the value its capacitance is 10nF or 10pF.
- R1 has a resistance of each 500Ohm and L1 each have an inductance of 2mH.
- 500Ohm is that typical value for the equivalent resistance of a compact fluorescent lamp while 2mH is a typical value for inductance one for operation this lamp represents a suitable lamp choke.
- For the capacitance of the resonance capacitor a value of 10nF is suitable for this arrangement.
- an operating frequency of 50 kHz results in a phase angle for the load circuit impedance of approx. 70 °. If a spiral breaks now, it will the resonance capacitor is disconnected from the load circuit.
- Another cost-effective way to register a potential-free Spiral breakage results from the use of an optocoupler.
- the current through the resonance capacitor or part of it is through the LED (input) of the optocoupler directed. In the event of a spiral break this LED goes out. This can be at the output of the optocoupler are detected potential-free and trigger a shutdown of the control gear.
- Figure 3 is a circuit diagram of an operating device for a gas discharge lamp with shutdown according to the invention when one of the two coils breaks with the help of phase detection.
- Figure 4 is a circuit diagram of an operating device for a gas discharge lamp with shutdown according to the invention when one of the two coils breaks with the help of an optocoupler.
- capacitors by the letter C resistors through R, inductances through L, transistors through T and diodes through D, each followed by a number.
- FIG. 3 shows AC voltage generator G3. His energy supply is not executed. It can be, for example, by a DC voltage source be fed.
- the Load circuit consisting of L31, the lamp Lp, C31 and R31 connected.
- the Load circuit is designed as a series connection of L31, the lamp Lp and R31. In this series connection, only one is used to connect the lamp Lp Connection of the two coils used. Via the other connection of the two filaments, C31 is connected in parallel to the lamp.
- R31 serves to record the load current.
- At the junction between R31 and the Lamp Lp is tapped off a voltage and the input x of the AC voltage generator G3 fed. This voltage is proportional to Load current.
- phase of the load circuit impedance Z is the difference in the phase the output voltage at the output terminals J1, J2 and the phase of the Load circuit current.
- phase in connection with the present Invention understood the portion of a periodic function that has since last zero crossing of this function has passed. If the time for one If the entire period is set at 360 °, the phase can be used as a phase angle can be described in degrees. According to this definition, the consideration of the Phase angle is not limited to sinusoidal processes. He often gives AC voltage generator is a substantially rectangular voltage from.
- the determination of the phase of the load circuit impedance can be based on a time measurement to be led back.
- the AC voltage generator G3 is the Time of the zero crossing of the voltage at the output terminals J1, J2 known because this voltage from the AC voltage generator G3 itself is produced.
- the time that passes until after a zero crossing of the Voltage at the output terminals J1, J2 at input x of the AC voltage generator G3 a zero crossing of the measured voltage is detected is a measure of the phase of the load circuit impedance.
- the microcontroller can simultaneously generate the output voltage of the AC voltage generator G3 serve.
- FIG 4 an operating device is shown, the potential-free detection of the spiral break with an optocoupler.
- the AC voltage generator G4 provides an AC voltage at its output terminals J1, J2 to operate the lamp Lp. Between the output terminals J1, J2 is the series connection of L41 and C43. Is parallel to C43 the lamp Lp switched with one connection of its two filaments. Between the other connections of the two coils are connected in series by C44 and C45. In their entirety, C43, C44 and C45 act as a resonance capacitor. Parallel to C44 is the series connection of R43 and the input diode of the Optocoupler OC1. R43 serves to limit the current Jx through the input diode of the OC1 optocoupler.
- the Zener diode is also parallel to C44 D42. It serves to limit the voltage on the series connection of R43 and voltage applied to the input diode of the optocoupler OC1.
- Form C44 and C45 a capacitive voltage divider that applies the voltage level to the lamp Lp adapts the necessary voltage level at the input diode of the optocoupler OCl.
- the energy supply for the AC voltage generator G4 takes place via the DC voltage supply DC + and DC-. In between is the series connection from R41 and the output transistor of the optocoupler OC2. At the junction of R41 and the output transistor of the optocoupler OC2 is through the series connection of D41 and R42 input A of the shutdown logic SD connected. if the Filaments of the lamp Lp are intact, a current Jx flows, causing the output transistor of the optocoupler OC2 is brought into the conductive state. This is the Voltage at input A of the shutdown logic with regard to the DC voltage potential DC- small. If a helix breaks, no more current Jx flows.
- the shutdown logic includes at least one Threshold switch and a timer. As soon as the voltage at the input of the shutdown logic for a predetermined time is above a predetermined threshold, the AC generator G4 switched off via line B.
- FIGS. 3 and 4 are each for only one lamp elaborated. However, there is also the possibility of switching off according to the invention can also be used for control gear for multiple lamps.
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Description
Claims (6)
- Elektronisches Betriebsgerät zum Betreiben einer oder mehrerer Gasentladungslampen, die Wendeln enthalten, wobei das Betriebsgerät folgende Merkmale aufweist:einen Wechselspannungsgenerator (G3), der eine Wechselspannung in einen Lastkreis einspeist,einen Lastkreis, der mindestens eine Lampe enthält und der so aufgebaut ist, dass die Phase das Stroms, der in den Lastkreis fließt bezüglich der anliegenden Wechselspannung wesentlich durch mindestens ein Bauelement bestimmt wird, das einen Strom führt, der durch die Wendeln fließt,eine Einrichtung zur Messung der Phase des Stroms der in den Lastkreis fließt bezüglich der anliegenden Wechselspannung
- Betriebsgerät gemäß Anspruch 1 dadurch gekennzeichnet, dass die Einrichtung zum Messen der Phase eine Zeitmessung durchführt zwischen dem Zeitpunkt des Nulldurchgangs der vom Wechselspannungsgenerator (G3) gelieferten Wechselspannung und dem Zeitpunkt des Nulldurchgangs des Lastkreisstroms.
- Betriebsgerät gemäß Anspruch 1 dadurch gekennzeichnet, dass das Bauelement, dessen Strom durch die Wendeln fließt, ein Kondensator (C31) ist.
- Elektronisches Betriebsgerät zum Betreiben einer oder mehrerer Gasentladungslampen, die Wendeln enthalten, wobei das Betriebsgerät folgende Merkmale aufweist:einen Wechselspannungsgenerator (G3), der eine Wechselspannung in einen Lastkreis einspeist,einen Eingang (B) an obigem Wechselspannungsgenerator (G3), wobei das Betriebsgerät abgeschaltet wird, falls an diesem Eingang (B) eine Spannung anliegt, die einen vorgegebenen Grenzwert verletzt;
- Betriebsgerät gemäß Anspruch 4 dadurch gekennzeichnet, dass das Betriebsgerät eine Abschaltlogik (SD) enthält, welche mindestens einen Schwellwertschalter und ein Zeitglied enthält und ein Signal liefert, das über den Eingang (B) des der Wechselspannungsgenerator (G3) das Betriebsgerät abschaltet.
- Betriebsgerät gemäß Anspruch 5 dadurch gekennzeichnet, dass die Abschaltlogik (SD) einen Eingang (A) aufweist, der mit dem Ausgang des Optokopplers verbunden ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10048976 | 2000-09-27 | ||
DE10048976A DE10048976A1 (de) | 2000-09-27 | 2000-09-27 | Betriebsgerät für Gasentladungslampen mit Detektion des Wendelbruchs |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1194016A2 true EP1194016A2 (de) | 2002-04-03 |
EP1194016A3 EP1194016A3 (de) | 2002-04-24 |
Family
ID=7658553
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01119853A Withdrawn EP1194016A3 (de) | 2000-09-27 | 2001-08-16 | EVG für Gasentladungslampen mit Phasen-Detektion |
Country Status (8)
Country | Link |
---|---|
US (1) | US6777942B2 (de) |
EP (1) | EP1194016A3 (de) |
KR (1) | KR20020025022A (de) |
CN (1) | CN1294786C (de) |
AU (1) | AU7611801A (de) |
CA (1) | CA2357897A1 (de) |
DE (1) | DE10048976A1 (de) |
TW (2) | TW319487U (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006010996A1 (de) * | 2006-03-09 | 2007-09-13 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Elektronisches Vorschaltgerät und Verfahren zum Betreiben einer elektrischen Lampe |
CN102375109B (zh) | 2010-07-09 | 2015-06-03 | 米沃奇电动工具公司 | 照明测试仪 |
US9723229B2 (en) | 2010-08-27 | 2017-08-01 | Milwaukee Electric Tool Corporation | Thermal detection systems, methods, and devices |
CN203705055U (zh) | 2011-03-15 | 2014-07-09 | 米沃奇电动工具公司 | 热像仪 |
US10794769B2 (en) | 2012-08-02 | 2020-10-06 | Milwaukee Electric Tool Corporation | Thermal detection systems, methods, and devices |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0338109A1 (de) * | 1988-04-20 | 1989-10-25 | Zumtobel Aktiengesellschaft | Vorschaltgerät für eine Entladungslampe |
EP0529901A1 (de) * | 1991-08-16 | 1993-03-03 | General Electric Company | Regelungsschaltung für einen zweifach rückgekoppelten Klasse-D Leistungsverstärker mit hohem Wirkungsgrad |
EP0610998A1 (de) * | 1993-02-08 | 1994-08-17 | Koninklijke Philips Electronics N.V. | Vorschaltgerät für eine Leuchtstofflampe |
US5457360A (en) * | 1994-03-10 | 1995-10-10 | Motorola, Inc. | Dimming circuit for powering gas discharge lamps |
US6008586A (en) * | 1997-02-06 | 1999-12-28 | Norman; Richard J. | Direct current ballastless modulation of gas discharge lamps |
WO2000038483A1 (en) * | 1998-12-22 | 2000-06-29 | Koninklijke Philips Electronics N.V. | High frequency electronic ballast for multiple lamp independent operation |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4277728A (en) * | 1978-05-08 | 1981-07-07 | Stevens Luminoptics | Power supply for a high intensity discharge or fluorescent lamp |
DE3805510A1 (de) | 1988-02-22 | 1989-08-31 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Schaltungsanordnung zum betrieb einer niederdruckentladungslampe |
US5004969A (en) * | 1989-10-16 | 1991-04-02 | Bayview Technology Group, Inc. | Phase control switching circuit without zero crossing detection |
US5075599A (en) * | 1989-11-29 | 1991-12-24 | U.S. Philips Corporation | Circuit arrangement |
US5181026A (en) * | 1990-01-12 | 1993-01-19 | Granville Group, Inc., The | Power transmission line monitoring system |
US5578908A (en) * | 1995-06-07 | 1996-11-26 | Nicollet Technologies Corporation | Phase control circuit having independent half cycles |
US5754036A (en) * | 1996-07-25 | 1998-05-19 | Lti International, Inc. | Energy saving power control system and method |
US5952832A (en) | 1996-12-06 | 1999-09-14 | General Electric Company | Diagnostic circuit and method for predicting fluorescent lamp failure by monitoring filament currents |
US6008593A (en) * | 1997-02-12 | 1999-12-28 | International Rectifier Corporation | Closed-loop/dimming ballast controller integrated circuits |
US6300777B1 (en) * | 1997-10-15 | 2001-10-09 | International Rectifier Corporation | Lamp ignition detection circuit |
US5925990A (en) * | 1997-12-19 | 1999-07-20 | Energy Savings, Inc. | Microprocessor controlled electronic ballast |
IT1306920B1 (it) * | 1998-01-05 | 2001-10-11 | Int Rectifier Corp | Circuito integrato per il controllo di stabilizzatori per lampadea fluorescenza |
US6100647A (en) * | 1998-12-28 | 2000-08-08 | Philips Electronics North America Corp. | Lamp ballast for accurate control of lamp intensity |
US6414400B1 (en) * | 1999-02-03 | 2002-07-02 | Coleman Powermate, Inc. | Small engine driven generator |
-
1994
- 1994-12-23 TW TW086204403U patent/TW319487U/zh unknown
-
2000
- 2000-09-27 DE DE10048976A patent/DE10048976A1/de not_active Withdrawn
-
2001
- 2001-08-16 EP EP01119853A patent/EP1194016A3/de not_active Withdrawn
- 2001-08-17 TW TW090120258A patent/TW507474B/zh active
- 2001-09-21 KR KR1020010058638A patent/KR20020025022A/ko not_active Application Discontinuation
- 2001-09-25 US US09/961,315 patent/US6777942B2/en not_active Expired - Fee Related
- 2001-09-26 AU AU76118/01A patent/AU7611801A/en not_active Abandoned
- 2001-09-26 CA CA002357897A patent/CA2357897A1/en not_active Abandoned
- 2001-09-27 CN CNB011411023A patent/CN1294786C/zh not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0338109A1 (de) * | 1988-04-20 | 1989-10-25 | Zumtobel Aktiengesellschaft | Vorschaltgerät für eine Entladungslampe |
EP0529901A1 (de) * | 1991-08-16 | 1993-03-03 | General Electric Company | Regelungsschaltung für einen zweifach rückgekoppelten Klasse-D Leistungsverstärker mit hohem Wirkungsgrad |
EP0610998A1 (de) * | 1993-02-08 | 1994-08-17 | Koninklijke Philips Electronics N.V. | Vorschaltgerät für eine Leuchtstofflampe |
US5457360A (en) * | 1994-03-10 | 1995-10-10 | Motorola, Inc. | Dimming circuit for powering gas discharge lamps |
US6008586A (en) * | 1997-02-06 | 1999-12-28 | Norman; Richard J. | Direct current ballastless modulation of gas discharge lamps |
WO2000038483A1 (en) * | 1998-12-22 | 2000-06-29 | Koninklijke Philips Electronics N.V. | High frequency electronic ballast for multiple lamp independent operation |
Also Published As
Publication number | Publication date |
---|---|
TW507474B (en) | 2002-10-21 |
US20020050824A1 (en) | 2002-05-02 |
CA2357897A1 (en) | 2002-03-27 |
CN1294786C (zh) | 2007-01-10 |
US6777942B2 (en) | 2004-08-17 |
TW319487U (en) | 1997-11-01 |
AU7611801A (en) | 2002-03-28 |
KR20020025022A (ko) | 2002-04-03 |
DE10048976A1 (de) | 2002-04-11 |
EP1194016A3 (de) | 2002-04-24 |
CN1347273A (zh) | 2002-05-01 |
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