Why do some light bulbs need a starter, some don't
Capacitor voltage is added to the triode VT2 is the base and VT2 conduction, C4, C5 start charging, charging current flows through the windings of the transformer T1 at 3, 2 induction winding up a negative voltage, the triode VT2 cut-off, winding induction 1 out of a forward voltage, VT1 conduction, the charge on the C4, C5 just discharge, due to the effect of self inductance of the winding 3, VT2 conduction VT1 again by again, so high frequency oscillation cycle, C5, T2, tube form LC series resonance circuit, triode part when the oscillation C5, T2 resonance occurs, produce high harmonic voltage, breakdown of gas inside the tubes, tubes start to glow.
But the ballast life is very long, it is not easy to damage. The starter electronic ballasts do not need to, it is more complex, the working principle of the common electronic ballast about three kinds of circuit structure,
The ballast need to cooperate to use the starter, it's in front of the working principle of the net friend "biting your tongue" has been explained in detail I will not repeat. Inductance ballasts now has a tendency to be eliminated, the weight is heavy, low voltage startup performance is not good, work have a buzzing sound,
This depends on ballasts, fluorescent lamp USES the ballast has two inductive ballasts and electronic ballasts, inductive ballasts structure is simple, ballast itself is an iron core coil,
