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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are widely used in various electronic products, such as TVs, digital cameras, music players and digital video recorders.

Application Field

Aluminum electrolytic capacitors are widely applied in many kinds of electronic products due to its high capacity, excellent frequency response, and low cost. It can be used in audio frequency, intermediate frequency and high frequency signal Filtering, coupling, decoupling, bypass and anti-interference, etc.

Aluminum electrolytic capacitors are particularly suitable for applications in ac circuits, such as the starting and running capacitors in electric motors, the lighting capacitors of lighting fixtures and neon lamps, motors and capacitors of household appliances, capacitors of dc circuits and computer power supply. In addition, aluminum electrolytic capacitors are also used in the power grid system of energy-saving induction lighting, dimming ballasts and high-frequency switching power supplies.

Working Principle

Aluminum electrolytic capacitors are made of an anode made of aluminum foil and a cathode made of aluminum oxide film. The electrolytic capacitor uses the electrolyte as the insulating barrier between the anode and the cathode. The anode of the aluminium electrolytic capacitor is etched and formed with a large area fin. It has greater active surface area than conventional capacitor, thus leads to a greater capacitance value in smaller volume.

Aluminum electrolytic capacitors are constructed with a capacitor element enclosed within a cylindrical aluminum case with a composed seal at both ends. Sealing the end with electrolyte liquid. A positive electrode is generally an electrolytic paper soaked in electrolyte liquid and a anode formed on an aluminum foil. A negative electrode plate is formed on a dielectric to form a stack structure.

Conclusion

Aluminum electrolytic capacitors are widely used in various electronic products due to their high capacity, excellent frequency response, and low cost. It has a wide application range, from dc input to ac input / output circuit, large current stability, high capacity, excellent frequency response, low cost, and a wide temperature range. In conclusion, aluminum electrolytic capacitors are the ideal choice for many circuit designs.

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