Three-phase single-stage soft-switching AC-DC converter with power factor correction

A three-phase AC-DC converter, comprising:

• first, second, and third input terminals that respectively receive first, second, and third AC voltage phases of a three-wire three-phase AC input voltage;
• first, second, and third rectifier circuits that respectively rectify the first, second, and third AC voltage phases received by the first, second, and third input terminals, and respectively produce first, second, and third input DC voltages;
• first, second, and third single-stage power factor correction (PFC) modules that respectively receive the first, second, and third input DC voltages and respectively produce first, second, and third output DC voltages;
• first and second output terminals;
• and
• a controller;
• wherein the first, second, and third output DC voltages are connected together in parallel across the first and second output terminals;
• wherein the controller senses the first, second, and third input DC voltages and input DC current of the first, second, and third single-stage PFC modules, and controls the first, second, and third single-stage PFC modules according to a single control parameter determined from the sensed voltages and currents;
• wherein the first, second, and third single-stage PFC modules provide simultaneous PFC operation and output voltage regulation with soft-switching.