H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 41/14 (2006.01) H05B 41/24 (2006.01) H05B 41/28 (2006.01) H05B 41/38 (2006.01)
Patent
CA 2068151
RD-20,854 IMPROVED STARTING CIRCUIT FOR AN ELECTRODELESS HIGH INTENSITY DISCHARGE LAMP Abstract A passive starting circuit for an electrodeless HID lamp includes a series resonant LC circuit including an inductor of variable impedance coupled in series with the parasitic capacitance between a starting probe and the excitation coil of the lamp, and further including a coupling capacitance for directly coupling the starting circuit to the excitation coil. The coupling capacitance is connected between the high terminal of the excitation coil, or a point in the circuit at approximately the same potential thereof, and a conductive support for holding the lamp and starting probe in a lamp fixture. In this way, the starting voltage is maximized for more efficient and rapid starting. Preferably, the series resonant capacitance of the starting circuit is optimized so that the ballast requires little, if any, retuning after the lamp has started.
Cocoma John Paul
El-Hamamsy Sayed-Amr Ahmes
Farrall George Albert
Company General Electric
Craig Wilson And Company
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