Electric lamp and discharge devices: systems – Pulsating or a.c. supply – With power factor control device
Patent
1997-05-09
1999-03-09
Kinkead, Arnold
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
With power factor control device
315205, 315209R, H05B 4116
Patent
active
058805648
ABSTRACT:
A circuit is proposed for the high-frequency operation of at least one lamp with an active harmonic filter with at least one capacitive pump branch with a pump capacitor (C1; C2) for feeding the energy back to a filter capacitor (C4) from a connection point on the lamp side between and including a central tap of the push-pull frequency generator and a first lamp diode, is characterized by the fact that a trapezoidal capacitor (CT1; CT2) is provided between a point of at least one pump branch, which, from the central tap of the push-pull frequency generator, lies out behind capacitor (C1; C2) of the pump branch, and one of the external taps, and thus the one or more pump capacitors of the one or more pump branches are the only capacitors connected in a direct capacitive load at the central tap of the push-pull frequency generator and/or no resonance capacitor (C6) connected directly in parallel to the lamp in the operating state is provided for lamp ignition.
REFERENCES:
patent: 4808887 (1989-02-01), Fahnrich et al.
Elektronik-schaltungen, Hirschmann, 1982, pp. 134-159.
Betriebsgerate und Schaltungen fur elektrische Lampen, Sturm and Klein, 1, pp. 121-137.
Bessone Carlo S.
Kinkead Arnold
Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen MBH
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