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

High-intensity discharge HID lights energy-saving electric light source technology, specifically high pressure sodium ballasts are sine wave plus noise composite FM. With electromagnetic interference suppression filter EMI main power rectifier circuits, active power factor pre-adjustment circuit APFC DC power supply and control circuit, self-oscillating pulse generator, the drive of the half-bridge or full-bridge, half-bridge or full-bridge switches inverse variable, the start circuit, characterized in also has a sine wave generator, the noise generator, the abnormality detection of the protection circuit. The high-pressure sodium lamp ballasts to change between coarse and noise disturbance dual characteristics of the fine adjustment around the center frequency varies with a sinusoidal cycle, enhanced inhibition of the lamp a discharge arc so that it can not form the standing wave, to avoid the effect of the acoustic resonance and floating arc significantly improve, and having constant power characteristics. Poor contact in the lamp, lamp aging such as the failure, abnormal protection can be obtained.