Inverter system for vehicle

An inverter system for a vehicle, comprising:

• an energy storage device configured to store electrical energy;
• a first inverter including a plurality of first switching elements, wherein the first inverter is configured to convert the electrical energy stored in the energy storage device into alternating-current (AC) electric power;
• a second inverter including a plurality of second switching elements different from the plurality of first switching elements, wherein the second inverter is connected to the energy storage device in a parallel relationship with the first inverter, and is configured to convert the electrical energy stored in the energy storage device into AC power;
• a motor configured to be driven by receiving AC power converted by the first inverter and the second inverter;
• current sensors disposed between the first inverter and the motor and disposed between the second inverter and the motor, respectively, wherein each of the current sensor is configured to detect a current input to the motor;
• and
• a controller configured to generate a pulse width modulation (PWM) signal for controlling driving of the motor, to determine a failure occurrence position between the first inverter and the motor or the second inverter and the motor based on the detected current, and to control the motor to be driven by the first inverter or the second inverter according to the failure occurrence position,
• wherein, when a failure does not occur between the first inverter and the motor or the second inverter and the motor, the controller controls driving of the first inverter and the second inverter based on a required output amount of the motor,
• wherein, when the required output amount of the motor is smaller than a reference value, the controller controls the plurality of first switching elements to drive the first inverter, and
• wherein switching and conduction losses of the first inverter are smaller than those of the second inverter.