Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Induction-type discharge device load
Patent
1986-10-27
1988-05-31
Moore, David K.
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
Induction-type discharge device load
315276, 315283, 315287, 315344, 315 39, 315 57, 331117R, 331117FE, H05B 4124
Patent
active
047483830
ABSTRACT:
A DC-AC converter for igniting and supplying a low-pressure discharge lamp, e.g. an electrodeless low-pressure gas discharge lamp. The converter has two input terminals (9, 10) for connection to a d.c. voltage source. The input terminals are connected to a series arrangement controlled semiconductor switching element (12), a first coil (14) and a parallel circuit having the discharge lamp 15 in one of its branches. The control electrode and a main electrode of the controlled semiconductor switching element are connected together by means of a secondary winding (21) of a transformer (17) having a primary winding (16) that forms a part of the parallel circuit. The converter includes a starter circuit comprising a resistor (28) connected between a main electrode and the control electrode of the semiconductor switching element and a capacitor (29) coupled between the control electrode and one end of the secondary winding (21) of the transformer.
REFERENCES:
patent: 4245178 (1981-01-01), Justice
patent: 4298828 (1981-11-01), Justice et al.
patent: 4392087 (1983-07-01), Zansky
patent: 4415838 (1983-11-01), Houkes
patent: 4463286 (1984-07-01), Justice
patent: 4647820 (1987-03-01), Chermin et al.
Franzblau Bernard
Moore David K.
Nickerson Michael J.
Treacy David R.
U. S. Philips Corporation
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