• 대한전기학회논문지:전기기기및에너지변환시스템부문B
• /
• 제54권10호
• /
• pp.492-496
• /
• 2005

An electronic ballast with automatic identification between HPS and MH lamps is proposed in this paper. The behavior of the lamp impedance is studied at both cold-starting and warm-starting. Lamp identification is carried out by taking into account the rate of impedance changing at constant current driving mode just after ignition. The ballast consists of 8-bit microcontroller and LCC resonant inverter.