About the regenerator and the ballast (high school physics)
The structure of the working principle of the fluorescent lamp, fluorescent lamp By tubes, ballasts, fluorescent lamp circuit and the starter of capacitor and other components (see figure 3-1), the structure and working principle of components as follows. 1, tube fluorescent tube is a glass tube, the inner wall coated with a layer of phosphor (tungsten acid magnesium, calcium tungstate, zinc silicate, etc.), different phosphor powder can make different colors of light. Thin tubes inside filled with inert gas such as argon gas and mercury vapor, on both ends of the tube is made of tungsten filament, filament electronic oxide coated with heated easy to launch. When the heater is energized, the light tube filament in emission electrons, still can make the tube temperature, mercury evaporate. At this time, if you add enough voltage at the ends of the tube, can make the tube argon gas ionization, so as to make the transition to the mercury vapor discharge lamp by argon discharge. Invisible ultraviolet light during a discharge within the tube wall of phosphor, make all sorts of color of visible light bulb
2, ballast ballast is a component with the daylight lamp series, is actually around the silicon steel core inductance coil, the impedance value is very large. The role of the ballast is: (1) current limiting lamp; (2) to produce enough self induction electromotive force, make the tube easy to discharge the light-off. Ballast in general, there are two in front, but some of the ballast in order to easy to light-off when voltage is insufficient, more around a coil, which has four s ballast
4, capacitor because of the large amount of inductance ballasts, fluorescent lamp circuit power factor is low, at around 0.0.6. In order to improve the power factor of line, therefore, requires the user to an appropriate size in parallel capacitor in the power source.
3 the starter, Is the starter of a small glow, in a small glass tube filled with neon, and is equipped with two electrodes. One of the electrode is worked by different expansion coefficient of two kinds of metal (usually called a bimetallic strip), two electrodes separated, when cold when heated bimetallic strip will become bending, because of the heat makes the electrode automatic closure
