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Aluminum electrolytic capacitors are widely used in electronic circuits and are the most widely used electrolytic capacitors. In a narrower sense, aluminum electrolytic capacitors are a type of electrolytic capacitor, which is a capacitor made of an aluminum dielectric oxide film. The application range of aluminum electrolytic capacitors is very wide. Its working principle can be explained as follows.

The general principle of aluminum electrolytic capacitors is the same as that of the traditional electrolytic capacitors. They all have a dielectric layer of oxide film on the surface of the aluminum foil as an electric separator, which acts as the capacitor\'s dielectric medium. The role of the electrolytic solution is to form an oxidative film on the surface of the aluminum sheet in electrolysis, which can improve the insulation performance of the capacitor and make the device more stable. The construction of the aluminum electrolytic components involves a series of processes, including the formation of the oxide film, the application of the electrolytic solution and the assembly of the capacitance.

In terms of application fields, aluminum electrolytic capacitors are used in various circuits and products in a wide range of applications, such as high-power inverters, switch power supplies, display monitors, AC-DC projectors, communication transceivers, industrial electronic instruments and medical electronic devices. In addition, aluminum electrolytic capacitors are also widely used in rectifying filters, frequency dividers, radio frequency amplifiers and pulse power circuits.

In terms of working principles, aluminum electrolytic capacitors are capacitors with a capacitance value in the range of hundreds of microfarads to tens of thousands of microfarads. The capacitance of aluminum electrolytic capacitors is much greater than that of other types of capacitors. This is because aluminum electrolytic capacitors have a large dielectric layer, which is formed on the aluminum-foil oxide film. This dielectric layer has a large area, resulting in a large capacitance value. A chemical reaction occurs when current passes through the aluminum electrolytic capacitor, and the charge carriers of the reaction generate opposite charges, resulting in a capacity. Since the dielectric of the capacitor has been established, no further charging or discharging action is required when the current is removed, so the main purpose of its application in various circuits and equipment is to maintain the charge stored.

In summary, aluminum electrolytic capacitors have a wide range of applications in electronics and are widely used in various circuits and equipment. The working principle is that the aluminum foil oxide film acts as the dielectric of the capacitor, and the electric current passes through the capacitor to form a charge carried by the chemical reaction, resulting in a capacitance. It is the wide range of applications and high capacitance that give aluminum electrolytic capacitors their popularity.

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