1. AC adapter (AC / DC converter), AC refers to alternating current. Many appliances require AC adapters. AC adapter is an AC power adapter often used in commercial products, but it is actually an AC power supply. In industry, we call it switching power supply, but its appearance looks slightly different.
2. Generally, when using AC adapter, you must know the input voltage range of power adapter. It is best to use the world-wide AC100-240V voltage input. The fluctuation range of the output voltage and current of the power supply is very small, but the overcurrent and overvoltage protection points are set by the manufacturer through accurate testing. Different computers have different load resistance values. If the computer suffers from some circuit failure, the power adapter can play a protective role.
3. Current direction of different adapters: the alternating current flows in two directions, and the size changes constantly. The frequency can be used to represent the speed of the change of the alternating current direction, and the phase can be used to represent the starting time of the alternating current transmission. The direct current has only one direction, and the current can only flow from the positive pole to the negative pole.
4. Various applications of AC: the electricity used by ordinary lamps and motors is AC, and DC is mainly used for various electronic equipment, electrolysis, electroplating, DC drive, etc.
