Why should electrolytic capacitors be activated?

The electrolytic capacitor is a kind of capacitor. The metal foil is a positive electrode (aluminum or tantalum), the oxide film (aluminum oxide or tantalum pentoxide) which is in close contact with the positive electrode is a dielectric, and the cathode is made of a conductive material or an electrolyte (the electrolyte may be a liquid or Solid) is composed of other materials. Since the electrolyte is the main part of the cathode, the electrolytic capacitor is named after it. At the same time, the electrolytic capacitors are not connected correctly. Aluminum electrolytic capacitors can be divided into four categories: lead-type aluminum electrolytic capacitors; horn-type aluminum electrolytic capacitors; bolt-type aluminum electrolytic capacitors; solid aluminum electrolytic capacitors.

What is the role of electrolytic capacitors?

Electrolytic capacitors are widely used in household appliances and various electronic products. Polar electrolytic capacitors usually function as power supply filtering, decoupling, signal coupling, time constant setting, and DC blocking in power supply circuits or intermediate frequency and low frequency circuits. Non-polar electrolytic capacitors are commonly used in speaker divider circuits, television S correction circuits, and start-up circuits for single-phase motors. The role of electrolytic capacitors is mainly divided into the following categories:

1) DC blocking - the role is to prevent DC from passing and let the AC pass.

2) Filtering----In the power supply circuit, the rectifier circuit turns the alternating current into a pulsating direct current, and after the rectifier circuit, a large-capacity electrolytic capacitor is connected, and the charging and discharging characteristics (storage energy) are used to make the rectification The post-pulsating DC voltage becomes a relatively stable DC voltage.

3) Coupling----In the process of transmission and amplification of low-frequency signals, in order to prevent the static working points of the two-stage circuit from interacting with each other, capacitor coupling is often used. As a connection between the two circuits, the AC signal is allowed to pass through and is transmitted to the next stage circuit.

4) Bypass—provides a low impedance path for some of the parallel components in the AC circuit.

5) Energy Storage----Storage of electrical energy for release when necessary.

6) Temperature compensation----compensate for the influence of other components on the temperature, and compensate for the stability of the circuit.

7) Tuning—System tuning of frequency-dependent circuits, such as cell phones, radios, and televisions.

Why is the electrolytic capacitor activated?

Electrolytic capacitors are placed for too long. How to activate electrolytic capacitors is a key factor in the service life. Large-capacity electrolytic capacitors should be placed for half a year or more. In the case of re-use, they must be activated to use them. Otherwise, it may cause damage or Use life.