Switching power supplies are based on high-frequency switching technology to convert unstable and cluttered alternating current (AC) into a low direct current (DC) voltage required by other devices. In fact, the switching power supply can be said to be an auxiliary cardiovascular device for other equipment, and its effect is very small.
The core core concept of switching power supply: increase the power of the power supply according to methods such as increasing the output power, thereby reducing the size and net weight of the power transformer. The significant advantage of power switching conversion is to further improve the high efficiency of electromagnetic energy conversion. The typical high efficiency of PC power supply is 70%-75%, while the high efficiency of the corresponding linear regulator power supply is only about 50%.
The reliability of the output voltage lies in the transition of the pulse width, which is called pulse width modulation PWM.
The working content of the switching power supply is simple.
When the municipal engineering power supply enters the power supply, high-frequency clutter and electromagnetic interference are first removed according to the choke coil and capacitor filtering device, and then the high-voltage DC power supply is obtained according to the rectifier and filtering device. Then part of the high-frequency communication is filtered out, so that the relative pure low-voltage DC power supply of the corresponding equipment is finally output.
Post time: Feb-18-2022