Interleaved SVPWM and DPWM for dual three-phase inverter-PMSM: An automotive application

This paper studies the dual three-phase inverter configuration for an electric vehicle drive feeding a dual three-phase permanent magnet synchronous machine. Employing interleaved SVPWM and DPWM modulation techniques with the proposed configuration, the input capacitor ripple current has been substantially reduced to 50-60 % compared to that of a conventional 2-level VSI. The optimal interleaving angles have been identified for capacitor ripple reduction considering both modulation indexes and power factors pertaining to the traction motor's operating range. The dual three-phase inverter's switching losses have been analyzed for two different DC-link voltages and output power levels and a 15-20% reduction in switching loss has been noted.