Film capacitor use: Are film capacitors used in mobile phones?

Capacitors are a very popular electrical equipment on the market, and its types are also quite rich and diverse, such as electrolytic capacitors, paper capacitors, ceramic capacitors, and film capacitors. The characteristics and applications of each type of capacitor The field and scope vary. What is the specific situation of film capacitors?

Film capacitors are made of organic plastic film as the medium, metal foil or metalized film as the electrode, and are made by winding (except for laminated structure). Among them, polyester film and polypropylene film are the most widely used. At present, the production of organic film capacitors in China is mainly polyester film capacitors, polypropylene film capacitors, etc. There are more than 100 production enterprises, state-owned, collective, and foreign-funded enterprises coexist. The foreign-funded enterprises are developing rapidly, and the production is still mainly traditional linear products. , Followed by small, ultra-small, chip products are still in the development stage.

Film capacitors belong to a kind of electrical appliances with a relatively high frequency of use. They are mainly used for cross-connection of analog signals and other power sources. Film capacitors have many excellent features and are a very good capacitor product.

The role of film capacitors:

The role of film capacitors is very important in practical applications, and our country has a wide range of applications in various fields. For example, many electronic fields at this stage, some relatively large household appliances and other fields.

Film capacitors are widely used, such as air conditioners, refrigerators, washing machines, fans, lamps, power supplies, and so on. Air conditioners and fans have the greatest demand for capacitors. This kind of thin film sensor has many functions in our daily communication; in real life, the electric power and other fields of various industries also play a very broad role; the current transportation industry also plays a very large role, for example EMUs, because of the fast running speed of EMUs, the technology of the railway industry has developed rapidly in recent years. It is an industry with very good prospects. Thin film sensors play an important role in the process of electrification of railways. The development of film capacitors in the hybrid vehicle industry exhibition is also more important.

Now, we are building a resource-saving society, and the country is also developing new resources. When developing new resources, such as wind power and solar power, film capacitors can also be used. The future prospects of this industry are better, and the application of film capacitors will increase. It is precisely because of the further stable development of these industries that the prospects of this market have become better and further promoted the economic growth of the film capacitor market.

In recent years, our science and technology have been very developed, so the development of these industries will be further developed with the development of technology. Therefore, better optimization between industries. Various industries, including electronics, home appliances, and electronic communications, are getting better and better. Film capacitors will be updated very quickly. The rapid development of science and technology will make the replacement cycle shorter and shorter, and the workmanship of film capacitors will get better and better.

Products can rely on the progress of capacitors to make their internal good electrical performance and high reliability a very favorable condition to further promote the above-mentioned industries, and become indispensable for these industries to be continuously updated and can be well replaced. Electronic components. In the development of recent years, the power of science and technology is important. With the continuous construction of digitization, informatization, and networking in the next few years, science and technology will continue to grow stronger. The application of film capacitors in various fields is important and increasing.

Advantages of film capacitors:

The applicable temperature range of the film capacitor is relatively wide, and the temperature limitation is relatively small;

This kind of capacitor has a very long service life. As long as there is no damage, there will be almost no service life limitation, and it can be used for a long time;

Film capacitors are metalized electrodes. This type of electrode has a self-healing function and can automatically repair when there is a small damage;

This kind of device can withstand very high voltage when it is working, without problems;

It has no polarity and ESR is also very low;

When in use, its use frequency characteristics are relatively good.

Application of film capacitors:

Application in power electronic circuits. Film capacitors are used here, mainly to buffer and clamp the power current, resonant bypass and suppress the electromagnetic interference of the power supply, etc.;

When the film capacitor is used as a bypass, it mainly plays a role in reducing the impedance of the DC bus and absorbing the ripple current from the load, thereby effectively suppressing the fluctuation of the DC bus voltage due to sudden load changes;

When the device is used in a resonant converter, it can function as an inductor to achieve resonance.