Method and system for starting and operating a discharge lamp

Details Method and system for starting and operating a discharge lamp Method and system for starting and operating a discharge lamp

H - Electricity

05

B

H05B 41/14 (2006.01) H05B 41/288 (2006.01) H05B 41/38 (2006.01)

Patent

CA 2175143

To effectively suppress glow discharge of a discharge lamp, especially a high-pressure discharge lamp, immediately after starting or firing, the lamp is supplied in a second, or run-on phase with a run-up current which has a form factor F greater than one (1), for example 1.13 to 1.45, and which has an effective value I eff which is higher than the rated normal operating current of the lamp. A control circuit (C), coupled to a controllable power supply, and to a switchable bridge circuit, controls the frequency of the run-on phase current to be higher than the normal operating frequency, for example about 2 kHz with a normal operating frequency between about 90-150 Hz.

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