POWER SUPPLY FOR ELECTRODELESS DISCHARGE LAMP WITH PROTECTION CIRCUIT

摘要

PURPOSE: A power supply device is provided to secure stable driving of an electroless discharge lamp by separating a main power for driving an auxiliary power for control. CONSTITUTION: An EMI(Electromagnetic Interference) filter(410) eliminates an electromagnetic wave from a commercial AC power source. A rectifier(420) changes an AC signal outputted from the EMI filter to a DC signal. A power factor compensation unit(430) compensates the power factor of the DC signal outputted from a rectifier. An inverter unit(440) changes the first DC voltage outputted from the power factor compensation unit into the AC voltage. A disconnection/short detector(460) detects the disconnection or short with the electroless discharge lamp. A resonator(470) is arranged between the inverter and the electroless discharge lamp.