Charging system and method for vehicle

A charging system for a vehicle, comprising:

• a power transmitter transmitting power for charging a battery of a vehicle;
• a charger including a three-phase motor and an inverter connected to the three-phase motor, and receiving the power transmitted from the power transmitter to charge the battery of the vehicle;
• an input voltage calculating processor selecting one of a plurality of predetermined duty ratios based on the power provided by the power transmitter and calculating a value of an input voltage transmitted to the charger based on the selected duty ratio and a voltage value of the battery of the vehicle;
• an input current calculating processor calculating a value of an input current which is inputted to the charger based on the calculated value of the input voltage and a value of the power from the power transmitter;
• a power transmission controller instructing the calculated input current to be input to the charger from the power transmitter;
• and
• a charging controller instructing the battery of the vehicle to be charged based on the calculated value of the input voltage and the voltage value of the battery of the vehicle.