The drive system powered by three-phase inverter often produces the common-mode voltage with high amplitude and high frequency, which is harmful to the electromagnetic compatibility of the electric drive system and the service life time of the motor bearing. In order to suppress the common-mode voltage, the generation mechanism of the common-mode voltage under the space vector pulse width modulation (SVPWM) algorithm is analyzed, and the common-mode voltage suppression algorithms such as AZPWM1, NSPWM and TSPWM are simulated and analyzed. The results show that the three algorithms can effectively suppress the common-mode voltage, and the TSPWM algorithm has lower switching loss, unlimited linear modulation region and better comprehensive performance. But the motor phase current harmonic content of the three algorithms is higher than that of SVPWM. The results provide theoretical basis and guidance for the selection of common-mode voltage suppression schemes.