Fluorescent lamp starter structure
Fluorescent starter structure is very simple, that is, a bimetal electrode and a fixed electrode encapsulated in a neon bubble, just turn on the fluorescent lamp power switch, because the fluorescent tube has not ignited, so the current through the ballast is very small , The ballast voltage drop is also very small, nearly 220V AC voltage neon nebubble glow discharge, bimetal electrode deformation and fixed electrode connected to the ballast, fluorescent lamp filament, Kai-hui And the two electrodes of the neon bubble are connected so that the neon bubble glow discharge of the starter is finished and the bimetal electrode is cooled and deformed to be separated from the fixed electrode so that the ballast The current of the device is suddenly interrupted. Ballast is an inductance component, will inevitably produce a self-inductance voltage to prevent current mutation, the voltage and power supply voltage in series in the fluorescent tube ends, so that the formation of gas discharge lamp channel, the fluorescent tube into the normal working condition. After the normal operation of the lamp, the current through the ballast increases, the ballast pressure drop also increases, the voltage between the two electrodes of the neon bulb is reduced to less than the neon bubble glow discharge required Voltage, starter of a work to complete. If the lamp has not been successfully activated, the above process will be repeated until the lamp is successfully started.
Starter neon bubble between the two electrodes in parallel with a few thousand pF of polyester capacitors, is to reduce the high-frequency interference with other devices used, the capacitor is easier to breakdown, the phenomenon of damage to the lamp after the two lights, The middle does not shine, a long time likely to cause aging or burn the ballast overheating, the capacitor can be restored to normal.