947D211K132BEMSN

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Introduction to Film Capacitors

A film capacitor is an electrical component operating in an electric field made by the material dielectric, such as, a polymer polyester film, Mylar, polypropylene, or polystyrene. With a high dielectric constant, the capacitor is able to store more charge in less area, thus offering capacitances much higher than other types of capacitors, such as ceramic or electrolytic capacitor. This makes the film capacitor an ideal choice for applications requiring large capacitance values.

947D211K132BEMSN application field and working principle

947D211K132BEMSN is a Polypropylene Film Capacitor manufactured by Hongfa. This capacitor has a rated voltage of 1KV, a capacitance value of 132uF and a tolerance of +/- 5%. The film capacitor is polarized, meaning that the positive and negative terminals must be observed while connecting it to a circuit.

This type of capacitor is designed primarily for energy conservation equipment, variable speed motor control, power factor correction, switch power supplies, and other applications that requiring high capacitance values. A typical application using 947D211K132BEMSN is for variable field induction machines, which are often used in industrial settings for controlling speeds of large electric motors.

In an electric field, the film a capacitor acts as an insulator between two conducting plates, with the dielectric material sandwiched in-between. Its working principle relies on the electrostatic capacity of the dielectric material, where two charged plates opposite in charge attract each other due to an electrostatic field set up between the plates. This causes the oxygen molecules in the dielectric to experience a change in density, resulting in a potential difference between the plates.

The capacitance of this type of capacitor is determined by the thickness of the dielectric material and the area between the two plates. As the thickness increases, the capacitance value increases proportionally, while the same holds true for the increase in area between the two plates.

Conclusion

In conclusion, the 947D211K132BEMSN is a type of Polypropylene Film Capacitor designed for high capacitance applications, such as energy conservation equipment, variable speed motor control, power factor correction, and switch power supplies. The working principle of this type of capacitor is based on the electrostatic capacity of the dielectric material, where two charged plates opposite in charge attract each other due to an electrostatic field set up between the plates. This leads to a change in density of the dielectric material, resulting in a potential difference between the plates. Finally, the capacitance of this type of capacitor is determined by the thickness of the dielectric material and the area between the two plates.

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