System and method for controlling inverter for driving motor

A system for controlling an inverter for driving a motor, the system comprising:

• the motor;
• the inverter including a plurality of switching elements turned on or off by a pulse width modulation (PWM) signal, converting DC power supplied thereto into AC power according to on or off of the plurality of switching elements and providing the AC power to the motor;
• a current sensor for detecting and outputting a current provided to the motor;
• a rotation angle sensor for detecting and outputting a rotor angle of the motor;
• and
• a controller configured for performing a duty determination control for determining a duty of the pulse width modulation signal on a basis of values detected by the current sensor and the rotation angle sensor and a torque command of the motor, associating a time at which the duty determination control is performed with the pulse width modulation signal, and arbitrarily changing a time at which the duty determination control is performed by changing a point in time at which a section that the pulse width modulation signal is higher than a predetermined value appears depending on a random setting time.