A KIND OF BALLAST PLOYED IN HIGH VOLTAGE SODIUM LAMP

摘要

The invention relates to a kind of ballast ployed in the high voltage sodium lamp, includes: magnetic core, magnet yoke, choke coil, the center of magnetic core is equipped with concave platform, the around mounts parasitic ' circle type ' body, between ' circle type ' body's concave platform and around side there is the flute, place the choke coil into the magnetic core's flute, and cover the magnet yoke to the magnetic core's upper end surface. Therefore, magnetic core and magnet yoke envelope choke coil totally, magnetic field generated by the magnetic core, magnet yoke does not exist magnetic-flux leakage phenomena basically, each directional magnetic field is made use of sufficiently. Comparing with the conventional ballast, this ballast's magnetic loss is low, magnetic conversion efficiency is improved better, in the same condition, magnetic core's sectional area and coil winding are few, temperature increment is low speed, thereby reduce the cost required by the ballast got-up raw material, reduce the volume and weight, reeling coil of wire is also simple, and improve the ballast's efficiency.