A driving apparatus for an electric vehicle, comprising: a motor including a stator having a main winding and an auxiliary winding and a rotor rotating due to magnetic interaction between the main winding and the auxiliary winding ; an engine configured to selectively rotate the rotor ; a motor controller including a first inverter connected to the main winding and a second inverter connected to the auxiliary winding ; a first battery connected to the first inverter and configured to drive the motor or configured to be chargeable by the motor ; a second battery connected to the second inverter , configured to be chargeable by the motor , and having a charging voltage lower than that of the first battery , and characterized in that : further comprising a field current controller electrically connected to the rotor of the motor , wherein the rotor includes a field winding , and wherein the field current controller is electrically connected to the field winding of the rotor, a first switch for connecting an output end of the first battery and an output end of the second battery is provided, and a second switch is provided between the first switch and the second battery , and wherein an interrupter switch is provided between the field current controller and the field winding , which is configured to protect the field current controller from a boosted voltage occurred when the second battery is charged with a charging voltage of the first battery in a state in which the engine and the rotor are stopped. a motor including a stator having a main winding and an auxiliary winding and a rotor rotating due to magnetic interaction between the main winding and the auxiliary winding ; an engine configured to selectively rotate the rotor ; a motor controller including a first inverter connected to the main winding and a second inverter connected to the auxiliary winding ; a first battery connected to the first inverter and configured to drive the motor or configured to be chargeable by the motor ; a second battery connected to the second inverter , configured to be chargeable by the motor , and having a charging voltage lower than that of the first battery , and characterized in that : further comprising a field current controller electrically connected to the rotor of the motor , wherein the rotor includes a field winding , and wherein the field current controller is electrically connected to the field winding of the rotor, a first switch for connecting an output end of the first battery and an output end of the second battery is provided, and a second switch is provided between the first switch and the second battery , and wherein an interrupter switch is provided between the field current controller and the field winding , which is configured to protect the field current controller from a boosted voltage occurred when the second battery is charged with a charging voltage of the first battery in a state in which the engine and the rotor are stopped. further comprising a field current controller electrically connected to the rotor of the motor , wherein the rotor includes a field winding , and wherein the field current controller is electrically connected to the field winding of the rotor, a first switch for connecting an output end of the first battery and an output end of the second battery is provided, and a second switch is provided between the first switch and the second battery , and wherein an interrupter switch is provided between the field current controller and the field winding , which is configured to protect the field current controller from a boosted voltage occurred when the second battery is charged with a charging voltage of the first battery in a state in which the engine and the rotor are stopped. <EOS>