What Are the Common Types of High-Voltage Electrolytic Capacitors?
High voltage electrolytic capacitors, commonly referred to as large capacitors, usually have two of them. Due to their particularly high withstand voltage, they have a very large volume. According to capacity, high-voltage electrolytic capacitors generally have 330uf, 470uf, 680uf, 820uf, 1000uf, 1200uf, etc. The withstand voltage value is generally 200V and the temperature resistance is 85 degrees.
What is the principle of a switch circuit?
The principle of a switch circuit is to form an oscillation circuit consisting of switch tubes and PWM (Pulse Width Modulation) control chips, generating high-frequency pulses. Convert the high-voltage direct current generated by the high-voltage rectification and filtering circuit into high-frequency pulse direct current, send it to the main transformer for voltage reduction, and convert it into low-frequency pulse direct current.
What is the principle of low-voltage rectification and filtering circuit?
Low frequency pulse DC is rectified by diodes and filtered by electrolytic capacitors, resulting in stable currents of different voltages being output. Due to the already low voltage here, although the capacitance is large, usually 1000uf, 2200uf, etc., the capacitance volume is small because it does not require a high withstand voltage value.
What is a high-voltage rectification and filtering circuit?
The high-voltage rectification and filtering circuit consists of a rectifier bridge and two high-voltage electrolytic capacitors. The function is to convert 220V AC mains power into 300V DC power.
What is the workflow of the power supply?
After the mains power enters the power supply, it first passes through the choke coil and capacitor filtering to remove high-frequency noise and interference signals, and then through rectification and filtering to obtain high-voltage direct current. Then, the DC power is converted into high-frequency pulsating DC power through a switching circuit, and then sent to a high-frequency switching transformer for voltage reduction. Then filter out the high-frequency AC part, and finally output relatively pure low-voltage DC power for the computer to use.
