A capacitor is an energy storage element used in circuits for tuning, filtering, coupling, bypass, energy conversion, and delay. A capacitor is usually called a capacitor. According to its structure, it can be divided into three types: fixed capacitors, semi variable capacitors, and variable capacitors. Aluminum electrolytic capacitor is a capacitor made by using an aluminum cylinder as the negative electrode, containing a liquid electrolyte, and inserting a curved aluminum strip as the positive electrode. While aluminum electrolytic capacitors are steadily growing in the traditional consumer electronics field, their application fields have been expanded in many emerging fields such as energy-saving lamps, frequency converters, and new energy with structural transformation and technological progress
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