System for charging vehicle battery using motor driving system

A system for charging a vehicle battery using a motor driving system, the motor driving system being configured to drive a motor having a plurality of windings respectively corresponding to a plurality of phases of the motor, the system comprising:

• a first inverter comprising a plurality of first switching elements, and comprising a DC terminal connected to the vehicle battery and an AC terminal connected to a first end of each of the plurality of windings;
• a second inverter comprising a plurality of second switching elements, and comprising a DC terminal that is connected to the vehicle battery in common with the DC terminal of the first inverter and an AC terminal connected to a second end of each of the plurality of windings;
• a plurality of transfer switches having first ends and second ends, the first ends of the plurality of transfer switches being directly connected to the second ends of the plurality of windings, respectively, and the second ends of the plurality of transfer switches being connected to each other;
• a first charging powering switch having a first end connected to a node where the second ends of the plurality of transfer switches are connected to each other and a second end receiving high potential of a DC charging voltage supplied from an outside of the system;
• a second charging powering switch having a first end connected to a negative terminal of the vehicle battery and a second end receiving low potential of the DC charging voltage;
• and
• a controller configured, in a charging mode in which the vehicle battery is charged, to control at least some of the plurality of transfer switches and the first and second charging powering switches to be short-circuited, and further configured, based on a magnitude of the DC charging voltage, to control opened/shorted states of the plurality of first and second switching elements, and the plurality of transfer switches,
• wherein the node is electrically connected to a positive terminal of the vehicle battery through the first inverter or the second inverter and is supplied with the high potential of the DC charging voltage.