The optimal output characteristics (V/F characteristics) can be selected to suit the application and load characteristics, and the inverter automatically streamlines motor control without the need for detailed parameter settings. In addition, it has a built-in auto-tuning function that measures the circuit constant of the motor, enabling stable motor drive even if wiring length is long or differences exist between individual motors. Furthermore, the use of an optimal excitation control mode that enables maximum motor efficiency reduces wasteful motor loss, minimises power consumption, and achieves good cost-effectiveness.