The working principle of DC regulated power supply
1. Main circuit
The whole process of inputting from AC grid and outputting DC, including:
1. Input filter: Its function is to filter the clutter existing in the power grid, and also prevent the clutter generated by the machine from being fed back to the public power grid.
2. Rectification and filtering: The AC power of the grid is directly rectified into a smoother DC power for the next level transformation.
3. Inverter: Convert the rectified direct current into high-frequency alternating current, which is the core part of the high-frequency switching power supply. The higher the frequency, the smaller the ratio of volume, weight and output power.
4. Output rectification and filtering: according to the needs of the load, provide a stable and reliable DC power supply.
2. Control circuit
On the one hand, sample from the output end, compare it with the set standard, and then control the inverter to change its frequency or pulse width to achieve stable output. The control circuit carries out various protection measures for the whole machine.
3. Detection circuit
In addition to providing various parameters in operation in the protection circuit, it also provides various display instrument data.
4. Auxiliary power supply
Provides power for different requirements of all single circuits.
