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

HPS electronic ballasts, which comprises a full bridge rectifier circuit, the passive correction circuit, a half-bridge inverter circuit, and the trigger circuit, anti-acoustic resonant circuit and a feedback circuit; said passive correction circuit is a two-way self-complementary circuit; triggercircuit by a pulse transformer L4, diode D10 in series with anti-sound frequency resonant circuit with the half-bridge inverter circuit output coil connection. Both ends of the resonant circuit wherein said high-pressure sodium lamp connected in the anti-sound frequency. A feedback circuit constituted by the inductor L5 and capacitor C4 in series, one end connected to the input terminal of the full bridge rectifier circuit and a half-bridge inverter circuit output coil. The advantages of electronic ballasts are as follows: good stability and reliable performance; simple circuit structure, long service life; improve the power factor to 0.98; small start-up current and operating current.