EP0208083A2 - Circuit réducteur d'intensité pour circuit ballast électronique pour lampe fluorescente - Google Patents

Circuit réducteur d'intensité pour circuit ballast électronique pour lampe fluorescente Download PDF

Info

Publication number: EP0208083A2
Authority: EP; European Patent Office
Prior art keywords: circuit; fluorescent lamp; current; ballast; dimmer
Prior art date: 1985-07-11
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.): Granted

Application number

EP86106303A

Other languages

German (de)

English (en)

Other versions

EP0208083A3 (en

EP0208083B1 (fr

Inventor

Ferdinand Mertens

Norbert Wittig

Fred Dr. Hasemann

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.)

1985-07-11

Filing date

1986-05-07

Publication date

1987-01-14

1986-05-07 Application filed by Trilux Lenze GmbH and Co KG filed Critical Trilux Lenze GmbH and Co KG

1986-05-07 Priority to AT86106303T priority Critical patent/ATE59754T1/de

1987-01-14 Publication of EP0208083A2 publication Critical patent/EP0208083A2/fr

1987-03-18 Publication of EP0208083A3 publication Critical patent/EP0208083A3/de

1991-01-02 Application granted granted Critical

1991-01-02 Publication of EP0208083B1 publication Critical patent/EP0208083B1/fr

2006-05-07 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

Images

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
- H05B41/295—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
- H05B41/2988—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the lamp against abnormal operating conditions

Definitions

the invention relates to a dimmer circuit for at least one electronic fluorescent lamp ballast, which has a power supply circuit that feeds two parallel circuit branches, each of which leads over an electrode of the fluorescent lamp and contains two electronic switches in series and has a control unit for controlling the electronic switches.
a known fluorescent lamp ballast (DE-OS 29 42 468) has four electronic switches which are connected in the manner of a bridge circuit, in the transverse branch of which the fluorescent lamp is located.
the electronic switches are switched by a logic control unit. To ignite the gas discharge, two diagonally opposite switches are blocked so that a current through the discharge of a Inductance is supported, flows through the fluorescent lamp. The switches are then clocked with a high-frequency alternating voltage of over 10 kHz, as a result of which the fluorescent lamp is periodically reversed with the frequency mentioned.
a current sensor is provided in one of the circuit branches, but is only used to determine the ignition of the fluorescent lamp and to switch off the control unit after a certain number of unsuccessful ignition attempts. The current through the fluorescent lamp depends on various parameters, for example the lamp resistance. Different ballasts are required for different lamp powers. A device for dimming is not provided in the known ballast.
phase control circuit instead of the mains switch to dim the fluorescent lamps, i.e. operate at partial load to produce a lower lamp brightness.
the magnitude of the voltage that is supplied to the ballasts is changed by the phase control circuit. If such a control circuit is used for numerous lights, then it must be designed for high performance.
leading edge control circuits are bulky and expensive. They are only able to change the voltage supplied to the ballast in a range from 0 to 100%, but cannot exceed 100%.
the invention has for its object a dimmer To create circuit of the type mentioned that performs a powerless or low power control of the ballast and is therefore able to control any number of ballasts together.
the current supplied to the fluorescent lamp can be changed as a function of a reference signal
the ballast is assigned a memory in which information about the nominal load of the fluorescent lamp is stored and that the reference signal is generated by a modulation circuit which combines the signal provided by the memory circuit with an external control signal.
the current that the ballast supplies to the fluorescent lamp is generated individually by a reference signal for the ballast in question.
the reference signal is formed from two different quantities, namely on the one hand from the content of the memory of the ballast and on the other hand from the external control signal.
the external control signal can be supplied to several ballasts together, each ballast then generating its own reference signal, which determines the lamp current, taking into account the content of its memory. In this way, it is possible to control numerous ballasts to which lamps with different nominal powers are connected by means of a common control signal, so that all lamps can be dimmed together.
the fluorescent lamps are then all operated with the same percentage of their nominal current.
the dimmer circuit according to the invention also makes it possible to operate fluorescent lamps with a current which is greater than the nominal current. This is possible because the control signal can assume a value that is greater than the value that corresponds to "100% lamp power". Fluorescent lamps can be operated briefly with a current that e.g. Corresponds to 130% of the nominal current without being damaged. If a high brightness is temporarily required, this can be achieved by changing the control signal accordingly.
the control signal and / or the content of the memory can be in digital form or as analog voltages.
the modulation circuit is designed either as a digital or an analog modulator.
the control signal is normally changed by manual actuation of an actuator or other input device in order to set the lamp brightness in the desired manner.
the modulation circuit is a multiplier.
the control signal indicates the percentage value of the lamp current from the nominal current. This percentage value is multiplied by the value of the nominal current contained in the memory.
the modulation circuit should be designed so that in the event that the control signal from Switched on state of an on / off switch is derived, the content of the memory circuit passes unchanged as a reference signal. This ensures that an on / off switch can be used instead of a control circuit which delivers a continuously or step-wise variable control signal in order to be able to operate the fluorescent lamp without dimming only at full lamp power.
the ballast 10 in FIG. 1 has a power supply circuit 11 which is operated with a mains voltage and supplies a DC voltage at its output.
One pole of the DC voltage is connected to two parallel circuit branches via an electronic switch 12, which is shown as a mechanical switch for reasons of clarity, and a coil 13.
One circuit branch contains the electronic switches T 1 and T 3 , between which the one electrode 14 1 of the fluorescent lamp 14 is connected.
the other circuit branch contains the series connection of the transistors T 2 and T 4 , between which the second electrode 14 2 of the fluorescent lamp 14 is connected.
the switches T 1 to T 4 are controlled by the logic control unit 15, which can be a microprocessor, for example.
the second end of the interconnected circuit branches is connected to the second pole of the DC voltage via a current sensor 16.
the switches T 1 to T 4 are in the conductive state or that a current can otherwise flow via the bridge circuit formed by the circuit branches and the lamp 14. Then, when the switch 12 becomes conductive, a current flows through the coil 13 and the bridge circuit. This current builds up slowly due to the inductance of the coil 12, and the increase can be assumed to be linear.
the output of the current sensor 16 is connected to the B input of a comparator 17 with hysteresis, the output signal of which controls the switch 12.
the A input of the comparator 17 receives a reference voltage U ref °. When the output signal of the current sensor 16 becomes equal to the value of the reference voltage, the switch 12 interrupts the current flow to the coil 13. The coil 13 tries to maintain this current.
the current continues to flow via a diode 21.
the switch 12 becomes conductive again through the control signal of the comparator 17. In this way, a current is generated in the bridge circuit T 1 to T4, the value of which is determined by the reference voltage U ref .
the output signal of the current sensor 16 is fed to the control unit 15 as an input variable.
the control unit 15 also receives further signals from various sensors (not shown), for example from Tem temperature sensors, timers or the like. In order to control the operation of the fluorescent lamp 14 depending on the ambient conditions and the circuit states and to control all switches T 1 to T 4 in such a way that inadmissible operating conditions occur that the lamp is then switched off.
FIG. 2 shows a dimmer circuit with two ballasts 10a and 10b, each of which corresponds in structure to the ballast 10 in FIG.
Each ballast 10a is assigned a memory circuit 18 which contains a value stored which corresponds to the nominal current of the fluorescent lamp 14 in question.
the memory circuit 18 can consist, for example, of a resistor arrangement, the resistors of which can be connected to an output line by pluggable current bridges, or of a digital read-only memory, the content of which can be changed manually.
each memory circuit 18 is connected to the A input of a modulation circuit, which in the present case consists of a multiplier 19.
the control signal of a common control circuit 20 is fed to the B input of the multiplier 19.
the control circuit 20 supplies the same control signal to all multipliers 19. It consists e.g. from a device with which the control signal can be changed between 0 and 130%.
the control circuit 20 forms the dimmer actuator for all connected ballasts.
each multiplier 19 supplies the reference voltage U ref ' which is fed to the A input of the comparator 17 of the ballast 10a or 10b becomes.
the multiplier 19 is a digital multiplier.
the output signal of the multiplier must be converted with a digital / analog converter in order to generate the reference voltage U ref .
a particular advantage of the dimmer circuit is that the shape of the mains input current of the individual ballasts is not adversely affected, so that disturbances to other consumers due to mains harmonics are avoided.

Landscapes

Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Circuit Arrangements For Discharge Lamps (AREA)

EP86106303A 1985-07-11 1986-05-07 Circuit réducteur d'intensité pour circuit ballast électronique pour lampe fluorescente Expired - Lifetime EP0208083B1 (fr)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
AT86106303T ATE59754T1 (de)	1985-07-11	1986-05-07	Dimmerschaltung fuer ein elektronisches leuchtstofflampen-vorschaltgeraet.

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE3524681		1985-07-11
DE19853524681 DE3524681A1 (de)	1985-07-11	1985-07-11	Dimmerschaltung fuer ein elektronisches leuchtstofflampen-vorschaltgeraet

Publications (3)

Publication Number	Publication Date
EP0208083A2 true EP0208083A2 (fr)	1987-01-14
EP0208083A3 EP0208083A3 (en)	1987-03-18
EP0208083B1 EP0208083B1 (fr)	1991-01-02

Family

ID=6275438

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP86106303A Expired - Lifetime EP0208083B1 (fr)	1985-07-11	1986-05-07	Circuit réducteur d'intensité pour circuit ballast électronique pour lampe fluorescente

Country Status (3)

Country	Link
EP (1)	EP0208083B1 (fr)
AT (1)	ATE59754T1 (fr)
DE (2)	DE3524681A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0444635A1 (fr) *	1990-02-28	1991-09-04	Toshiba Lighting & Technology Corporation	Appareil pour commander la luminosité
EP0490329A1 (fr) *	1990-12-07	1992-06-17	Tridonic Bauelemente GmbH	Système de contrôle de l'intensité lumineuse et du comportement de lampes à décharge
FR2681754A1 (fr) *	1991-09-23	1993-03-26	Electricite De France	Installation d'eclairage electrique et procede de commande et de surveillance de ladite installation.
FR2684511A1 (fr) *	1991-11-28	1993-06-04	Boudan Jacques	Procede et dispositifs contribuant a la realisation d'un reseau de convertisseurs d'energie electrique relies a une unite centrale.
EP0759686A3 (fr) *	1995-08-18	1997-12-29	Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH	Procédé et circuit pour commander une lampe
EP1028605A1 (fr) *	1999-02-14	2000-08-16	Yazaki Corporation	Commutateur avec détection de défauts en parallèle
EP1135005A3 (fr) *	2000-03-10	2005-05-25	Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH	Dispositif pour commander des sources lumineuses munies d'un ballast

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE4401823A1 (de) *	1994-01-22	1995-07-27	Efmt Entwicklungs Und Forschun	Stellvorrichtung zur Steuerung von elektrischen Lasten
US6969955B2 (en)	2004-01-29	2005-11-29	Axis Technologies, Inc.	Method and apparatus for dimming control of electronic ballasts
EP2345310A4 (fr)	2008-06-13	2013-01-16	Univ Kingston	Ballast électronique à étage unique à gradation à facteur de puissance élevé

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4039897A (en) *	1976-03-08	1977-08-02	Dragoset James E	System for controlling power applied to a gas discharge lamp
CA1128604A (fr) *	1977-11-07	1982-07-27	Don F. Widmayer	Systeme d'eclairage economiseur d'energie
FR2416617A1 (fr) *	1978-02-07	1979-08-31	Signaux Entr Electriques	Convertisseur pour l'alimentation de lampes a decharge, et plus generalement de lampes a arc, et son application aux projecteurs pour de telles lampes
CA1112295A (fr) *	1978-03-31	1981-11-10	Nabil K. Takla	Regulateurs d'eclairage programmables
DE2942468A1 (de) *	1979-10-20	1981-04-30	Trilux-Lenze Gmbh + Co Kg, 5760 Arnsberg	Schaltungsanordnung fuer den hochfrequenten betrieb einer oder mehrerer leuchtstofflampen

1985
- 1985-07-11 DE DE19853524681 patent/DE3524681A1/de active Granted
1986
- 1986-05-07 AT AT86106303T patent/ATE59754T1/de not_active IP Right Cessation
- 1986-05-07 DE DE8686106303T patent/DE3676363D1/de not_active Expired - Lifetime
- 1986-05-07 EP EP86106303A patent/EP0208083B1/fr not_active Expired - Lifetime

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0444635A1 (fr) *	1990-02-28	1991-09-04	Toshiba Lighting & Technology Corporation	Appareil pour commander la luminosité
EP0490329A1 (fr) *	1990-12-07	1992-06-17	Tridonic Bauelemente GmbH	Système de contrôle de l'intensité lumineuse et du comportement de lampes à décharge
EP0689373A3 (fr) *	1990-12-07	1997-05-07	Tridonic Bauelemente	Circuits pour commander l'intensité lumineuse et le mode de fonctionnement de lampes à décharge
FR2681754A1 (fr) *	1991-09-23	1993-03-26	Electricite De France	Installation d'eclairage electrique et procede de commande et de surveillance de ladite installation.
EP0534839A1 (fr) *	1991-09-23	1993-03-31	Electricite De France	Installation d'éclairage électrique et procédé de commande et de surveillance de ladite installation
FR2684511A1 (fr) *	1991-11-28	1993-06-04	Boudan Jacques	Procede et dispositifs contribuant a la realisation d'un reseau de convertisseurs d'energie electrique relies a une unite centrale.
EP0759686A3 (fr) *	1995-08-18	1997-12-29	Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH	Procédé et circuit pour commander une lampe
EP1028605A1 (fr) *	1999-02-14	2000-08-16	Yazaki Corporation	Commutateur avec détection de défauts en parallèle
US6356138B1 (en)	1999-02-14	2002-03-12	Yazaki Corporation	Switching device with break detecting function
EP1135005A3 (fr) *	2000-03-10	2005-05-25	Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH	Dispositif pour commander des sources lumineuses munies d'un ballast

Also Published As

Publication number	Publication date
DE3524681C2 (fr)	1988-07-14
EP0208083A3 (en)	1987-03-18
ATE59754T1 (de)	1991-01-15
EP0208083B1 (fr)	1991-01-02
DE3524681A1 (de)	1987-01-22
DE3676363D1 (de)	1991-02-07

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