Power supply device, charging system and charge scheduling method

A power supply device, comprising:

• a first winding, a second winding, a third winding, a fourth winding, a first alternating current-direct current (AC-DC) conversion unit, a second AC-DC conversion unit, a first power supply terminal and a second power supply terminal;
• the first winding and the second winding disposed on a secondary side of a multi-pulse transformer, and coupled to an input of the first AC-DC conversion unit;
• the first power supply terminal coupled to an output of the first AC-DC conversion unit;
• the third winding and the fourth winding disposed on the secondary side of the multi-pulse transformer, and coupled to an input of the second AC-DC conversion unit;
• and
• the second power supply terminal coupled to an output of the second AC-DC conversion unit;
• wherein phases of output voltages of the first winding, the third winding, the second winding and the fourth winding are successively increased or decreased by 15°;
• wherein the first winding and the second winding forms a first winding pair, the third winding and the fourth winding forms a second winding pair, the first winding pair corresponds to the first AC-DC conversion unit, the second winding pair corresponds to the second AC-DC conversion unit, and each of the first winding pair and the second winding pair is in a one-to-one correspondence with a corresponding one of the first AC-DC conversion unit and the second AC-DC conversion unit.