About China AC-DC Power Supply manufacturers

What is power supply?
A power supply is an electrical device that converts current from a power source (such as a power supply) to the voltage and current values ​​required to power a load (such as a motor or electronic device). The goal of the power supply is to supply the load with the proper voltage and current. Current must be supplied in a controlled manner (and at an accurate voltage) to various loads, sometimes simultaneously, all without allowing changes in input voltage or other connected equipment to affect the output.

What is AC power or DC power?
Direct current (DC) is produced when current flows in one constant direction. It usually comes from batteries, solar cells or AC/DC converters. DC is the preferred power source type for electronic devices. Alternating current (AC) occurs when electrical current periodically reverses its direction.