EP0050131B1 - Ballast pour une lampe a decharge - Google Patents

Ballast pour une lampe a decharge Download PDF

Info

Publication number
EP0050131B1
EP0050131B1 EP81900979A EP81900979A EP0050131B1 EP 0050131 B1 EP0050131 B1 EP 0050131B1 EP 81900979 A EP81900979 A EP 81900979A EP 81900979 A EP81900979 A EP 81900979A EP 0050131 B1 EP0050131 B1 EP 0050131B1
Authority
EP
European Patent Office
Prior art keywords
ballast
inverter
transistor
switching device
bistable switching
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
Application number
EP81900979A
Other languages
German (de)
English (en)
Other versions
EP0050131A1 (fr
Inventor
Max Kerscher
Armin KRÖNING
Anh-Dung Nguyen
Reinhold Priller
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.)
Siemens AG
Original Assignee
Siemens AG
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
Priority claimed from DE3014419A external-priority patent/DE3014419C2/de
Priority claimed from DE19803029672 external-priority patent/DE3029672A1/de
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT81900979T priority Critical patent/ATE8316T1/de
Publication of EP0050131A1 publication Critical patent/EP0050131A1/fr
Application granted granted Critical
Publication of EP0050131B1 publication Critical patent/EP0050131B1/fr
Expired 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
    • H05B41/2981—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 a ballast according to the preamble of claim 1, as described for example in DE-A-26 42 272.
  • the invention has for its object to protect the ballast against overload.
  • the solution to this problem is characterized in claim 1.
  • an additional winding of the saturation transformer supplying the control voltages for the transistors of the inverter is preferably short-circuited. According to a development of the invention, this also simultaneously supplies the current-dependent voltage for the RC element in the input of the bistable switching device.
  • the RC Link in the input circuit of the bistable switching device must still be charged to such an extent that a new response is triggered.
  • the RC element is also connected in parallel with the transistor of the bistable switching device via a decoupling diode via a decoupling diode and is thus discharged when it is triggered.
  • the current-dependent shutdown of the ballast is also effective when the lamp is missing if, according to a development of the invention, the connections for the electrodes of the lamp are each bridged by a capacitor dimensioned such that a sufficiently high current flows in the series resonant circuit.
  • Another embodiment of the invention relates to a ballast in which a single step-up converter feeds two inverters.
  • a selective shutdown of the respective inverter concerned is provided, whereas the intact inverter continues to work and the lamp which it supplies can therefore continue to burn.
  • the step-up converter according to fig. 1 contains a storage capacitor C18 which is connected on the one hand via the charging diode D27 and the charging inductor L4 and on the other hand via a measuring resistor R33 to a main rectifier G1 in a two-way circuit, which is fed by an AC voltage network N and has an essentially unsmoothed voltage at its terminals 1, 4 delivers.
  • a two-position controller X (see FIG. 2), which controls the main transistor V6 as a switch, is used to regulate the voltage at the storage capacitor C18.
  • the signal at the measuring resistor R33 located between the main transistor V6 and the storage capacitor C18 on the one hand and the main rectifier G1 on the other hand is fed to the input 7 of the controller X via a delay element (resistor R27 and capacitor C14).
  • the inverter W contains two transistors V7, V8 connected in series between its terminals 11, 8 on the storage capacitor C18. Parallel to the switching path of the transistor V7 is a series resonance circuit with the inductor L7 and the capacitor C23 in series with a switching capacitor C22 and the primary winding L81 of a saturation transformer T8 with secondary windings L82, L83, L84.
  • the discharge lamp L is arranged in parallel with the capacitor C23, so that its electrodes are connected in series with the series resonant circuit.
  • a circuit known per se, of which only the secondary windings L83, L84 of the saturation transformer T8 are shown, is used for alternating control of the transistors V7, V8: this alternately results in a charging of the reversing capacitor C22 via V8 from C18 and then a discharge via V7.
  • the operating frequency of the inverter determined by the saturation transformer is slightly above the resonance frequency of the series resonance circuit: This creates a gap between the reversal of V7 and V8.
  • a delayed start-up of the inverter is ensured by means of a capacitor C19, which is only charged when the controller X is working; If there is sufficient voltage at C19, V8 is activated via a trigger diode D34 and C19 is then discharged again via D33 (sufficient energy for a cold start).
  • the capacitor C19 is in turn connected in parallel via a capacitor C20 and a diode D32 to the switching path of the main transistor V6 and can therefore only be charged to a value sufficient for the inverter to oscillate when the controller is clocked properly.
  • the capacitor C20 is connected in parallel with the protective capacitor C17 via a resistor R40: the energy from C20, like that from C17, therefore serves to charge the partial capacitors C8 and C9, which supply the operating voltages for the electronics.
  • the saturation transformer T8 has an additional secondary winding L82 through which a current flows via a bistable switching device K. dependent shutdown is effected.
  • the switching device K contains a comparator V12 fed back via a diode D16 and a transistor V10 controlled by it.
  • the output - terminal 16 - of the comparator 12 has a negative potential. It only switches over (positive potential at the output) when the voltage at its positive input becomes greater than a reference voltage at its negative input. Then V17 receives a control current via R60 and blocks the transistors V2, V3 and, via these, also V5 and the main transistor V6.
  • the transistor V10 blocked in normal operation - positive potential at terminal 15 - is turned on via R13 - zero potential at terminal 15 - and thereby the winding L82 of transformer T8 is short-circuited via diode D41.
  • the transistors V7, V8 of the inverter therefore no longer receive a control voltage and block.
  • the capacitor C11 is simultaneously discharged to such an extent that no immediate shutdown takes place when the device is started up again.
  • the shutdown described is dependent on the voltage across the capacitors C11 and C10, which are discharged via R14 and charged via the diode D41 and resistor R41 with a voltage that is supplied by the secondary winding L82 of the transformer T8 in the inverter and that flows through the current L7 is proportional (particularly high with the lamp not ignited, the series resonance circuit not damped).
  • Capacitors C10 and R14 are dimensioned in such a way that a quick succession of fewer start pulses - starting a new lamp - does not lead to switch-off any more than a larger number of pulses with a greater distance (start of an old lamp).
  • capacitors C26 and C27 are provided in parallel to the electrodes L1, L2 and are dimensioned such that the current flowing when the lamp is missing is above the response limit value.
  • the reactance of the capacitors C26 and CC27 is approximately ten times the resistance of an electrode at the average operating frequency of approximately 40 kHz.
  • the heart of the two-point controller shown in FIG. 2 is a comparator V13, the output of which is connected via a resistor R25 to a terminal P, to which a positive operating voltage can be switched via a transistor V3.
  • V13 controls a transistor V4, the collector of which is connected to the base of a further transistor V5, via which the control current of the main transistor V6 is then conducted.
  • V5 The basis of V5 is also based on the tap of a voltage divider which is connected between the positive terminal P and the terminal 4 which is at zero potential and which supplies the setpoint for the comparator V13; For this purpose, a signal dependent on the rectified mains voltage is fed to the resistor R2 of the voltage divider via the terminal 1 and the resistor R1.
  • the hysteresis of the two-point regulator is determined by connecting the collector of transistor V4 to a tap of this voltage divider.
  • the setpoint of the controller can be reduced by connecting a transistor V16 to R2 in parallel:
  • V16 is controlled by a comparator V15, which normally has a negative output potential, so that V16 blocks. However, V15 controls V16 when the bistable switching device K of the monitoring part U tilts into the switch-off state:. Then the negative input of V15 via D52, terminal 15 and transistor V10 is at zero potential.
  • the transistor V3 is used to switch off the controller under certain critical operating conditions, via which the positive operating voltage can be switched to the controller (terminal P).
  • This transistor is controlled by a further transistor V2, which is only turned on when the operating voltage has reached a minimum value required for operation.
  • the potential of the base of V2 is sufficiently greater than that at the emitter, which is determined by the Zener diode D13: This makes the transistors V2 and V3 conductive and the supply voltage for the controller is at P.
  • V3 remains on as long as the monitoring part Ü is in the normal state, has a negative potential at the output of the comparator V12 and at terminal 16, and thus transistor V17 is blocked via diode D62.
  • the second inverter is to be connected in parallel with its terminals 11, 13, 14, 8 and 4 to the terminals of the same name in FIG. 1. Only terminals 15 and 16 of the second inverter are to be connected to terminals 15 'and 16' of the common controller X.
  • the inputs 16 and 16 ' belong to an AND circuit (R60, D61, D62) on the control path of transistor V17, which is only turned on and thus switches off the controller when both inverters are switched off: as long as one of the inverters is still working, is at terminal 16 or 16 'of its monitoring part minus potential, through which the associated diode D62 or D61 is turned on and V17 is blocked.
  • R60, D61, D62 AND circuit

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

Les lampes a decharge souvent reliees au reseau de tension alternative par un onduleur et un redresseur, l'onduleur travaillant avec une frequence d'au moins 10kHz. Il est ainsi possible de maintenir l'inductance necessaire pour la limitation de courant faible et en meme temps d'obtenir un rendement d'eclairage eleve. Toutefois, avec ce systeme, l'allure du courant preleve du reseau s'ecarte tres fortement de la forme sinusoidale. Afin d'eviter cet inconvenient on a deja commande le prelevement de courant a l'aide d'un regulateur a deux positions recevant la demi-onde du reseau comme valeur de consigne et le courant de lampe comme valeur effective. Avec ce ballast on evite la modulation de la tension de lampe avec la tension de reseau qui en resulte.

Claims (8)

1. Ballast pour le raccordement d'une lampe à décharge (L) à un réseau à tension alternative (N), comportant un onduleur (W) muni de transistors (V7, V8) et dont la fréquence est égale à au moins 10 kHz et est déterminée par un transformateur saturé (T8) commandant les transistors, un circuit résonnant série (C23, L7) dont la fréquence de résonance est inférieure à la fréquence de service de l'onduleur et par l'intermédiaire duquel la lampe à décharge (L) est alimentée par l'onduleur (W), la lampe à décharge (L) étant branchée en parallèle avec le condensateur (C23) du circuit résonnant série, et un dispositif d'accroissement de tension comportant une bobine d'inductance de charge (L4), un transistor principal (V6), une diode de charge (D27) et un condensateur accumulateur d'énergie (C18) entre le réseau à tension alternative et l'onduleur, et un régulateur à deux positions (X) qui commande le transistor principal (V6) avec une fréquence de commutation égale au moins à 20 kHz, caractérisé par un dispositif de contrôle (Ü) répondant au courant traversant la bobine de self (L7) du circuit résonnant série et au moyen duquel le régulateur à deux positions (X) et l'onduleur (W) sont débranchés lorsque l'intégrale, par rapport au temps, du courant traversant la bobine de self (L7) du circuit résonnant série dépasse une valeur maximale déterminée.
2. Ballast suivant la revendication 1, caractérisé par le fait que le dispositif de contrôle (Ü) contient un dispositif de commutation bistable (K) comportant un transistor (V10) et qui est commandé par l'intermédiaire d'un circuit RC en fonction du courant traversant la bobine de self du circuit résonnant série et bascule, pour une valeur limite de sa tension d'entrée, dans l'état de débranchement dans lequel son transistor (V10) est commandé dans son état conducteur.
3. Ballast suivant la revendication 2, caractérisé par le fait que le transistor saturé (T8) possède un enroulement secondaire supplémentaire (L82) qui est branché en parallèle avec le transistor (V10) du dispositif de commutation bistable (K) et auquel est raccordé le circuit RC (R41, R14, C10, C11) situé dans le circuit d'entrée du dispositif de commutation.
4. Ballast suivant la revendication 3, caractérisé par le fait que le circuit RC (C11, R14, C10) situé dans le circuit d'entrée du dispositif de commutation bistable (K) est également branché en parallèle avec le transistor (V10) du dispositif de commutation bistable (K).
5. Ballast suivant la revendication 2, caractérisé par le fait qu'il est prévu un seul dispositif d'accroissement de tension servant à alimenter deux onduleurs comportant chacun un dispositif de contrôle associé, et qui est débranché par l'intermédiaire d'un circuit ET (R60, D61, D62) lorsque les dispositifs de commutation bistables (K) des deux onduleurs (W) sont dans leur état débranché.
6. Ballast suivant la revendication 5, caractérisé par le fait que la valeur de consigne du régulateur à deux positions (X) est réduite par l'intermédiaire d'un circuit OU (R50, D51, D52) lorsque le dispositif de commutation bistable (K) de l'un des onduleurs est dans son état débranché.
7. Ballast suivant l'une des revendications 1 à 6, caractérisé par le fait que la lampe à décharge (L) comporte des électrodes pouvant être chauffées, que le condensateur (C23) du circuit résonnant parallèle (C23, L7) est disposé entre les électrodes et que chaque électrode est shuntée par un condensateur (C26, 27) possédant un dimensionnement tel que le dispositif de commutation bistable (K) répond également dans le cas où la lampe (L) est manquante.
8. Ballast suivant la revendication 7, caractérisé par le fait que l'impédance des condensateurs (C26, C27) branchés en parallèle avec les électrodes (11, 12) est, pour une fréquence moyenne de service de l'onduleur, approximativement égale au décuple de la valeur résistance d'une électrode.
EP81900979A 1980-04-15 1981-04-14 Ballast pour une lampe a decharge Expired EP0050131B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81900979T ATE8316T1 (de) 1980-04-15 1981-04-14 Vorschaltgeraet fuer eine entladungslampe.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3014419A DE3014419C2 (de) 1980-04-15 1980-04-15 Vorschaltgerät für eine Entladungslampe
DE3014419 1980-04-15
DE3029672 1980-08-05
DE19803029672 DE3029672A1 (de) 1980-08-05 1980-08-05 Vorschaltgeraet zum anschluss einer entladungslampe

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP83101515A Division EP0092654A3 (fr) 1981-04-14 1981-04-14 Appareil ballast
EP83101515.1 Division-Into 1983-02-17

Publications (2)

Publication Number Publication Date
EP0050131A1 EP0050131A1 (fr) 1982-04-28
EP0050131B1 true EP0050131B1 (fr) 1984-07-04

Family

ID=25784967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81900979A Expired EP0050131B1 (fr) 1980-04-15 1981-04-14 Ballast pour une lampe a decharge

Country Status (4)

Country Link
EP (1) EP0050131B1 (fr)
FI (1) FI69540C (fr)
IT (1) IT1137447B (fr)
WO (1) WO1981003102A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0092654A3 (fr) * 1981-04-14 1984-04-18 Siemens Aktiengesellschaft Appareil ballast
DE3277718D1 (de) * 1981-07-31 1987-12-23 Siemens Ag Dc-ac conventer
DE3301632A1 (de) * 1983-01-19 1984-07-26 Siemens AG, 1000 Berlin und 8000 München Umrichter
AU2708684A (en) * 1983-05-05 1984-11-08 Dubank Electronics Pty. Ltd. Electronic ballast and starter
DE3503778C2 (de) * 1985-02-05 1986-11-20 Trilux-Lenze Gmbh + Co Kg, 5760 Arnsberg Leuchtstofflampen-Vorschaltgerät
AT390156B (de) * 1985-05-14 1990-03-26 Zumtobel Ag Schutzschaltung fuer eine wechselrichterschaltung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2355600A1 (de) * 1972-11-13 1974-05-16 Gen Electric Geregelte leistungseinspeisung mit einem halbwellenschalter
US3913002A (en) * 1974-01-02 1975-10-14 Gen Electric Power circuits for obtaining a high power factor electronically
US3969652A (en) * 1974-01-04 1976-07-13 General Electric Company Electronic ballast for gaseous discharge lamps

Also Published As

Publication number Publication date
FI69540B (fi) 1985-10-31
WO1981003102A1 (fr) 1981-10-29
EP0050131A1 (fr) 1982-04-28
IT8121036A0 (it) 1981-04-10
FI811179L (fi) 1981-10-16
FI69540C (fi) 1986-02-10
IT1137447B (it) 1986-09-10

Similar Documents

Publication Publication Date Title
DE69530143T2 (de) Schutzschaltung für Bogenentladungslampen
DE3587792T2 (de) Elektronisches Vorschaltgerät für Leuchtstofflampen.
EP0338109B1 (fr) Convertisseur pour lampe à décharge
DE69217615T2 (de) Steuerungsschaltung fuer eine entladungslampe
DE69019648T2 (de) Gerät zur Versorgung einer Leuchtstofflampe.
DE69224433T2 (de) Steuerungsschaltung für eine entladungslampe
EP0239793B1 (fr) Disposition de circuit pour la mise en oeuvre de lampes à décharge basse pression
DE3805510A1 (de) Schaltungsanordnung zum betrieb einer niederdruckentladungslampe
EP0146683B1 (fr) Onduleur
DE69202783T2 (de) Zünd- und Betriebsschaltung für Bogenentladungslampe.
EP0753987B1 (fr) Circuit et procédé d'opération de lampes électriques
DE19729768B4 (de) Schaltungsanordnung zum Zünden und Betreiben einer Leuchtstofflampe
DE3014419C2 (de) Vorschaltgerät für eine Entladungslampe
EP0116302B1 (fr) Convertisseur
EP0050131B1 (fr) Ballast pour une lampe a decharge
DE69709652T2 (de) Universeller elektronischer starter für starkstromentladungslampen
EP0085073B1 (fr) Convertisseur
EP0389847B1 (fr) Circuit
EP0331157B1 (fr) Alimentation de puissance à découpage
EP0276460B1 (fr) Disposition de circuit pour mettre en oeuvre une lampe à décharge basse pression
EP0212740A2 (fr) Disposition de circuit pour le démarrage et le fonctionnement de lampes à décharge gazeuse
DE3626209A1 (de) Vorschaltgeraet fuer wenigstens eine entladungslampe
DE3112281C2 (de) Vorschaltgerät mit einem Hochsetzsteller und mehreren, je eine Entladungslampe speisenden Wechselrichtern
EP0564895B1 (fr) Ballast électronique pour lampes à décharge basse-pression
DE3029672C2 (fr)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19811030

AK Designated contracting states

Designated state(s): AT CH FR GB LI NL SE

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT CH FR GB LI NL SE

REF Corresponds to:

Ref document number: 8316

Country of ref document: AT

Date of ref document: 19840715

Kind code of ref document: T

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
EAL Se: european patent in force in sweden

Ref document number: 81900979.6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19980420

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19980709

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19990331

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990430

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991101

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19991101

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20000413

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000414

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20000418

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20000426

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20010413

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 20010429

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Effective date: 20010413

EUG Se: european patent has lapsed

Ref document number: 81900979.6