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 (160, 260) connected to the main winding and a second inverter (170, 270) connected to the auxiliary winding; a first battery (191, 291) connected to the first inverter (160, 260) and configured to drive the motor or configured to be chargeable by the motor; a second battery (192, 292) connected to the second inverter (170, 270), configured to be chargeable by the motor, and having a charging voltage lower than that of the first battery (191, 291), 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 (160, 260) connected to the main winding and a second inverter (170, 270) connected to the auxiliary winding; a first battery (191, 291) connected to the first inverter (160, 260) and configured to drive the motor or configured to be chargeable by the motor; a second battery (192, 292) connected to the second inverter (170, 270), configured to be chargeable by the motor, and having a charging voltage lower than that of the first battery (191, 291), 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.