Multi-input charging system and method using motor driving device

A multi-input charging system using a motor driving device, comprising:

• a motor having a plurality of windings respectively corresponding to a plurality of phases;
• a first inverter including a plurality of first switching elements and having a first end connected to a charging power input terminal to which charging power is inputted from outside, and a second end connected to a first end of each of the plurality of windings;
• a second inverter including a plurality of second switching elements and having a first end connected to a second end of each of the plurality of windings;
• a battery connected to the charging power input terminal or a second end of the second inverter through a charging switch;
• and
• a controller configured to connect the charging switch to directly charge the battery through the charging power input terminal based on a voltage of the charging power when a battery charging mode is started, or disconnect the charging switch and control the first switching elements and the second switching elements such that the charging power input terminal and the battery are connected through the first inverter, the motor, and the second inverter in a bypass manner, thereby charging the battery at a reduced voltage.