In layman's terms, ACDC converter is to convert alternating current (AC) to direct current (DC). AC, which is an abbreviation for AlternaTIng Current, means "alternating current"; DC, which is an abbreviation for Direct Current, means "direct current". "ACDC conversion is through the rectifier circuit, the alternating current through the rectifier, filtering, and thus converted to a stable direct current.
AC/DC converter is the alternating current into direct current equipment, the power flow can be bidirectional, power flow from the power supply to the load is called "rectifier", power flow from the load back to the power supply is called "active inverter" AC / DC converter input is 50 / 50 / 50 / DC converter, the power flow from the load back to the power supply is called "active inverter" AC / DC converter. DC converter input for 50/60Hz AC power, because it must be rectified, filtered.
Therefore, the relatively large filter capacitors are essential, and at the same time, due to the encounter of safety standards (such as UL, CCEE, etc.) and EMC directive restrictions (such as IEC, FCC, CSA), the AC input side of the EMC filtering must be added and the use of components in line with the safety standards, which restricts the miniaturization of the size of the AC / DC power supply, and in addition, due to the high frequency, high voltage, high current switching action inside. In addition, it is also necessary to have a high frequency, high voltage, and high current switching action in the AC/DC power supply.
Extended information
AC-DC power module role
I, isolation
1, safety isolation: strong and weak power isolation \IGBT isolation drive \ surge isolation protection \ lightning isolation protection (such as human contact with the isolation of the medical electronic equipment protection)
2, Noise isolation: (analog and digital circuit isolation, strong and weak signal isolation)
3, ground loop elimination: remote signal transmission\distributed power supply system
Two, protection
Short-circuit protection, over-voltage protection, under-voltage protection, over-current protection, and other protections
Three, the voltage converter
Boost conversion\buck conversion\\ AC/DC conversion (AC/DC, DC/AC)\Polarity conversion (positive and negative polarity conversion, single power supply and positive-negative power conversion, single power supply and multiple power conversion)
Four, voltage stabilization
AC utility power supply\remote DC power supply\distributed power supply system\battery power supply