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Aluminum Electrolytic Capacitors
Aug 31, 2018

The structure of a general aluminum electrolytic capacitor: an aluminum electrolytic capacitor is made of an aluminum cylinder as a negative electrode, which is filled with a liquid electrolyte, and a capacitor formed by inserting a bent aluminum strip as a positive electrode is called an aluminum electrolytic capacitor. It is a general-purpose electrolytic capacitor made of aluminum material with good electrical properties, wide application range and high reliability. National product. Developed and produced by China Zhenhua Group Xinyun Equipment Factory earlier. The annual production capacity is 1 billion. The product has 30 models and thousands of specifications, and is widely used in air conditioners, tape recorders, washing machines, communication machines and other household appliances and electronic complete machines, instruments and meters. It is wound by an anode foil (including a guide pin), a negative foil (including a guide pin), and an electrolytic paper (including an electrolyte) to form a cylindrical core, and then the core is sealed in an aluminum shell by a rubber stopper, aluminum The outer sleeve of the shell is covered with an insulating sleeve, and the performance parameters, polarity, trademark and the like of the capacitor are provided on the sleeve. The negative electrode foil is mostly a light foil rolled by pure aluminum (ie, clear water foil), and the anode foil is a corrosion foil with many tiny pits on the surface, and the aluminum oxide (AI203) on the anode foil acts as a dielectric, electrolysis. The liquid (impregnated in the electrolytic paper) and the negative electrode foil together constitute the negative electrode of the capacitor.

      It is a general-purpose electrolytic capacitor made of aluminum material with good electrical properties, wide application range and high reliability. National product. Developed and produced by China Zhenhua Group Xinyun Equipment Factory earlier. The annual production capacity is 1 billion. The product has 30 models and thousands of specifications, and is widely used in air conditioners, tape recorders, washing machines, communication machines and other household appliances and electronic complete machines, instruments and meters. It is made of an aluminum cylinder as a negative electrode, which is filled with a liquid electrolyte, and a capacitor formed by inserting a bent aluminum strip as a positive electrode is called an aluminum electrolytic capacitor. The core is made up of an anode aluminum foil, a liner paper impregnated with an electrolyte, a cathode aluminum foil, a natural oxide film, etc., and the core is impregnated with an electrolyte and sealed with an aluminum shell and a rubber cover to form an electrolysis. Capacitor. In general, aluminum electrolytic capacitors have a plastic sleeve on the outside of the aluminum casing. The color of the casing is colorful, it is not only beautiful, but has a specific meaning.


      Aluminum electrolytic capacitors are characterized by large capacity, but large leakage, large error, and poor stability. They are often used for AC bypass and filtering, and are also used for signal integration when the requirements are not high. Electrolytic capacitors have positive and negative poles and cannot be reversed during use. The voltage that the capacitor actually has to withstand in the circuit cannot exceed its pressure. In the filter circuit, the withstand voltage of the capacitor should not be less than 1.42 times the effective value of the AC. When using electrolytic capacitors, be careful not to reverse the positive and negative poles.