What is the power supply?

A power supply is a device that supplies electrical energy for one or more uses. This device may be separate from the load or may be made as an integral device that attaches to its load. The power supply in its simplest form includes the input part and the output part of the power supply, which are mainly electrically isolated from each other. The most important parameters in the input and output of the power supply are as follows:
Input section includes input voltage, input ground, current consumption, surge current, input fuse, frequency, dc power supply, power fault memory, PFC power factor correction

Output section includes output voltage, secondary ground, short circuit current, residual ripple or distortion, output characteristics, output current

Types of power supply

Types of power supplies include:
DC power supply
AC power supply
AC to DC power supply
Switching power supply
Linear regulator
Programmable power supply
Uninterruptible power supply or UPS
High voltage power supply
Computer power supply

DC power supply

DC power supplies provide a constant DC supply voltage for the connected load. The input of the DC power supply can be AC ​​or DC power.
The image below shows an example of a Phoenix power supply whose input voltage is AC and its output voltage is DC.