STARTING GEAR Russian patent published in 2003 - IPC

FIELD: electrical engineering; gas-discharge lamps of dc lighting fixtures. SUBSTANCE: starting gear has unregulated power supply whose input is connected to ac mains; regulated power supply with adjusting switch; pulse generator connected to input of pulse-width modulator whose second input is connected to feedback amplifier and output, to control electrode of regulated power supply adjusting switch; ignition unit; current sensor inserted between positive pole of regulated power supply and anode lead of gas-discharge lamp; regulated power supply whose input is connected to output of unregulated power supply; novelty is that proposed starting gear is made in the form of stepdown voltage changer with output of ignition unit inserted between anode lead of lamp and starting lead of choke connected to part of its inductive ballast reactor, finishing lead of choke functioning as negative pole of regulated power supply is connected to cathode lead of lamp; feedback amplifier input is connected to current sensor output. Starting gear may be provided with voltage sensor connected in parallel with leads used for connecting lamp electrodes and with analog multiplier whose inputs are connected to outputs of current and voltage sensors, respectively, and output, to feedback amplifier. EFFECT: enhanced service life and reliability due to simplified design of device and provision for lamp power regulation. 2 cl, 2 dwg