Common-mode voltage mitigation in multiphase electric motor drive systems

Common-mode voltage (CMV) produces serious reliability and electromagnetic interference (EMI) issues in modern pulse-width modulated (PWM) electric drives. Such will become more prominent the near future, as industry moves towards introduction of wide-bandgap (WBG) semiconductor technologies operating at higher switching frequencies also with greater dvdt. In this context, multiphase drive can be great interest, their additional degrees freedom exploited to reduce CMV. This work aims study potential motor systems for CMV mitigation. To do so, a comprehensive review most recent scientific literature is conducted, mainly focusing on high impact works published recently. As result, clear up-to-date picture common technologies, i.e., (m+1)-leg, multiple three-phase, open-end star-connected provided along reduction potential. Not only topologies themselves but modulation techniques are analysed presented, systems. conclusion, it stated that such promising candidates substitute conventional three-phase drives as, apart from well-known advantages (efficiency, power density, splitting, fault tolerance), confirmed. The technical information help researchers field engineers design develop high-performance