Fluorescent lamp Capacitor Application

Fluorescent lamp is mainly used in shopping malls, factories, homes, streets and roads. The lighting of the inherent power factor is around 0.4, which seriously affect the voltage quality lighting load. Therefore, improving the lighting of the power factor compensation capacitors, and the synthesis of a fluorescent lamp is necessary to complete. If the power factor increased to 0.85, then the compensation capacitor capacity is about 3 ~ 45mF between. In this paper, a simple analysis of several compensation circuits, and propose feasible capacitors.Fluorescent lamps along with the coupling capacitor
Fluorescent lamps with capacitors, there are three connection methods:

1. Parallel capacitor circuit;

2. Series capacitor circuit;

 3. Semi-resonant circuit. Capacitor which plays a different role. First like to say that the advantages and disadvantages of each connection mode and the economy are subject to lighting equipment on the market around.
Capacitors used in fluorescent lamp circuits
Fluorescent lamps manufacturers often seen as a burden to the capacitor, because it threatens the competitiveness of products. They are the technical specifications of lighting requirements of the capacitor is very strict, requiring high reliability capacitors, low prices.
Early design lighting capacitors foreign experience shows that because the capacitors are installed in accordance with the standards, they are sometimes subject to its internal media of low temperature. In addition, the night higher voltage, harmonic currents will increase the risk of overloading.
Fluorescent lamps with fluorescent lamps capacitor manufacturer requirements combined into one, therefore, the capacitor must be able to 70 ~ 85 ℃ operating temperature range, and because of the extensive industrial and commercial applications, but also to increase safety standards.
As a result of higher temperatures, effectively sealing the capacitor is also a serious difficulty. The reason is the capacitor insulating oil within the expansion when temperature is higher, or run in the production of gas.
Lighting capacitors can be used for dry metallized film capacitors. The polypropylene film capacitor to pass by the side of the metal, and then curled a film by the two cylindrical components. Thus, the metal layer to act as electrodes, two metal layers with a layer of film, this layer of film as medium, the formation of the capacitor element. Individual components and the main insulation molded aluminum or plastic in a cylindrical shell, the dry metal capacitors. Capacitor consisting of a single component can run at higher temperatures, and metal film capacitors are “self-healing” feature. The so-called “self-healing” feature is the film dielectric breakdown caused by short circuit between the poles may be of great current through the point so that it melted the metal film is evaporated, so there is no breakdown at the electrodes, it is not recurrence of the short circuit. Therefore, this capacitor is safe, reliable, no leakage, completely suitable for use as fluorescent compensation capacitors.