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Machine translation
1. (WO1981003102) BALLAST FOR CONNECTING A DISCHARGE LAMP
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/003102    International Application No.:    PCT/DE1981/000058
Publication Date: 29.10.1981 International Filing Date: 14.04.1981
IPC:
H05B 41/298 (2006.01)
Applicants:
Inventors:
Priority Data:
3014419 15.04.1980 DE
Title (EN) BALLAST FOR CONNECTING A DISCHARGE LAMP
(FR) BALLAST POUR LA CONNEXION D"UNE LAMPE A DECHARGE
Abstract: front page image
(EN)Discharge lamps are often connected to the AC network through an inverter and a rectifier, the inverter operating at a frequence of at least 10 kHz. It is possible in this way to maintain the necessary inductance for limiting the low current and at the same time to obtain a high lighting efficiency. However, with this system, the shape of the current extracted from the network differs very much from the sinusoidal shape. In order to avoid this disadvantage the extraction of current has already been controlled by means of a two-state rectifier receiving the half-wave of the network as an order value and the lamp current has an effective value. With this ballast the resulting modulation of the lamp voltage with the network voltage is avoided.
(FR)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.
Designated States:
Publication Language: German (DE)
Filing Language: German (DE)