China manufacturer of magnetic ballasts for metal halide flood lights & hps flood lights

The high-pressure discharge lamp electronic ballasts, including the resistance to electromagnetic interference filter circuit, the bridge rectifier circuit, the active power correction circuit, the ignition circuit, the lamp current, the voltage detection circuit, and the temperature and the failure detection circuit, by the micro-processing controller and DC/ DC regulator circuit consisting of power and current pulse width modulation controller, and by a micro controller and the low-frequency square wave converter circuit consisting of the low-frequency square wave full bridge converter. The by the MCU and its software and voltage drive full-bridge converter, high pressure discharge lamp with a low-frequency square wave low frequency high voltage AC power. PMW pulse width modulation controller through the MCU to detect high-pressure discharge lamp output voltage and current to control the width of the low-frequency square wave to control the power to maintain the supply current under constant conditions, in different working stages of the lamp to provide different current and power , thereby reducing thehigh-pressure sodium ballasts damage, and to achieve the energy saving effect, the low-frequency square wave power supply does not generate acoustic resonance.