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1. WO2000040059 - SELF-OSCILLATING RESONANT CONVERTER WITH PASSIVE FILTER REGULATOR

Publication Number WO/2000/040059
Publication Date 06.07.2000
International Application No. PCT/EP1999/010227
International Filing Date 15.12.1999
IPC
H05B 41/282 2006.01
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
41Circuit arrangements or apparatus for igniting or operating discharge lamps
14Circuit arrangements
26in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
28using static converters
282with semiconductor devices
CPC
H05B 41/282
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
41Circuit arrangements or apparatus for igniting or operating discharge lamps
14Circuit arrangements
26in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
28using static converters
282with semiconductor devices
Y02B 20/183
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
20Energy efficient lighting technologies
16Gas discharge lamps, e.g. fluorescent lamps, high intensity discharge lamps [HID] or molecular radiators
18Low pressure and fluorescent lamps
183Specially adapted circuits
Y02B 20/185
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
20Energy efficient lighting technologies
16Gas discharge lamps, e.g. fluorescent lamps, high intensity discharge lamps [HID] or molecular radiators
18Low pressure and fluorescent lamps
183Specially adapted circuits
185Self-resonant bridges
Y10S 315/07
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
315Electric lamp and discharge devices: systems
07Starting and control circuits for gas discharge lamp using transistors
Applicants
  • KONINKLIJKE PHILIPS ELECTRONICS N.V. [NL/NL]; Groenewoudseweg 1 NL-5621 BA Eindhoven, NL
Inventors
  • CHANG, Chin; NL
Agents
  • BOSMA, Rudolphus, H., A.; Internationaal Octrooibureau B.V. Prof. Holstlaan 6 NL-5656 AA Eindhoven, NL
Priority Data
09/221,95428.12.1998US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SELF-OSCILLATING RESONANT CONVERTER WITH PASSIVE FILTER REGULATOR
(FR) CONVERTISSEUR RESONANT AUTO-OSCILLANT AVEC REGULATEUR A FILTRE PASSIF
Abstract
(EN)
An electronic fluorescent lamp ballast having output voltage stabilized by a bandpass filter connected between a transformer control winding and the switching electrode of the switching transistor. In one embodiment especially adapted for ballast which power multiple lamps, the filter causes oscillation frequency to vary with the number of lamps lit in such a way that output (lamp) voltage remains relatively constant. A filter for this application preferably includes a low-Q tank circuit in the series path of a $g(p) section, and has an input high pass T section. In another embodiment, a low cost electronic ballast having power feedback uses passive bandpass filters between transformer control windings and the control electrodes, so as to simplify the control and driver circuitry.
(FR)
La présente invention concerne un ballast pour lampe fluorescente électronique dont la tension de sortie est stabilisée par un filtre passe-bande monté entre un enroulement de commande de transformateur et l'électrode de commutation du transistor de commutation. Selon un mode de réalisation particulièrement adapté à un ballast d'alimentation pour lampes multiples, le filtre fait varier la fréquence d'oscillation au gré du nombre de lampes allumées de sorte que la tension de sortie (lampes) reste relativement constante. Un filtre destiné à cette application doit de préférence comporter un circuit bouchon à faible Q dans le chemin en série d'une section $g(p), et comporte une section T passe haut de sortie. Selon un autre mode de réalisation, un ballast électronique bon marché avec rétroaction de puissance comporte des filtres passe-bande passifs entre les enroulements de commande du transformateur et les électrodes de commande, ce qui simplifie les circuits de commande et d'attaque.
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