Common-mode voltage in three-phase voltage source inverters, introduced by employing pulse-width modulation (PWM), can be detrimental to electric machines driven by adjustable speed drives (ASD). The utilization of zero voltage vectors results in common-mode voltage of highest amplitude. In this paper, a hybrid PWM strategy, only utilizing non-zero voltage vectors, is proposed for common-mode voltage reduction in ASDs. The proposed hybrid PWM strategy incorporates remote state PWM (RSPWM) and near state PWM (NSPWM) to cover a wide range of output frequencies and voltages in ASDs.
