A Comparison of Vibrations on the Induction Motor driven by Inverter

Various types of pulse width modulation (PWM) schemes have been proposed to drive three-phase voltage-fed inverters (voltage source inverters). Among them, the two-phase PWM scheme can achieve relatively higher AC voltage, lower switching times and lower switching loss than the three-phase PWM scheme. However, the two-phase PWM scheme has a disadvantage that the harmonics in the AC line voltage and current are distributed over a wide frequency range. This paper compares the vibrations generated in induction motors driven by three-phase voltage-fed inverters with various PWM schemes.