Is switching power not power? Why should the word "switch" be added?
One of the power supply, but with a PWM switching technology, and the traditional linear adjustment distinction
Switching power supply its working principle is not the same, first of all it will be the main power through the rectifier into a DC with a fluctuation, coupled with the capacitor and other energy-saving front-end components, and then through the transistor (MOS tube) and other devices will be a DC Intermittent form added to the high-frequency transformer, the use of inductive induced current in the secondary level to produce the required current or power.
???????This is the power of a lot of advantages, one is the small size of light weight. Second, the same power cheap, the third is high efficiency, four is the output voltage stability, can allow the input voltage has a large fluctuations without affecting the output voltage.
??????Disadvantages are: manufacturing more complex, covered with more knowledge, electromagnetic interference is relatively large, high power on the power grid is relatively large.
General power supply, such as 220V of the electricity plus a common transformer (power frequency transformer) coupled with the rectifier rectifier and capacitor filter has become an ordinary power supply. Early power supply are. Is such a. After the line with a linear regulator circuit has become a power supply. But this power supply on the input voltage requirements are higher, the larger the voltage input after the wave may not reach the adjustment effect , While the high pressure when the pressure drop in the adjustment device, the power efficiency is low.
