BFC238311684

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Introduction of Film Capacitors

The film capacitor is a medium and small capacity capacitor, which can be divided into two major categories: polyester film capacitor (PVC film capacitor) and polypropylene film capacitor (PP film capacitor). Generally, low-voltage capacitors are mostly polyester film capacitors, and high-voltage capacitors are mostly polypropylene film capacitors. The film capacitor is a capacitor with a plastic film as a medium. The plastic film is a high-resistance material. After special treatment such as punching, shaping and metallizing, a multiple-layer winding structure is formed. The most common type of winding structure is self-healing, which has the characteristics of small volume, small loss, safety and reliability, and can produce capacitance under high voltage.

BFC238311684 Application Field and Working Principle

The BFC238311684 series is a polyester film capacitor. It is widely used in ac/dc motor drives, power diodes, thyristors, converters and other electro-mechanical fields. This series of film capacitors are designed for AC applications where high energy density is required. This series is characterized by high reliability, low loss, good self-healing property and wide range of rated voltage.

The working principle of the BFC238311684 series is not complicated. The BFC238311684 series is a self-healing capacitor, which has a cylindrical shape made up by multiple layers of plastic film which is wound with thin metal wire inside and outside. When the capacitor is working, the thin metal wires on the inside and outside form an independent electricity loop. In the steady state, electric current will flow through the capacitor in a cycle, and the electric energy stored in the capacitor will be released as electric current in the form of heat. Through the steady-state heat emission, the capacitor is able to maintain thermal stability and reduce the effect of thermal drift. In the case of overvoltage or overcurrent, the thin metal wire will fail, the capacitor will be self-healing, and the electric current will also be broken.

Conclusion

The BFC238311684 series is a polyester film capacitor, widely used in ac/dc motor drives, power diodes, thyristors, converters and other electro-mechanical fields. This series has a self-healing structure, making it capable of safely working at extremely high voltages. After overvoltage or overcurrent, the capacitor will self-heal, and the electric current loop will open, avoiding further damage to the capacitor.

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