... NGUYEN et al.: REDUCED SWITCHING LOSS PWM STRATEGY TO ELIMINATE COMMON-MODE VOLTAGE IN MULTILEVEL INVERTERS 5429 TABLE I POSSIBLE MAPPING FUNCTIONS AND MODULATING SIGNALS DETERMINATION A d B→s1... terminal A to the load neutral) are shown in Fig 27 for the voltage-based mapping algorithm and in Fig 28 for the switching loss optimizing mapping algorithm NGUYEN et al.: REDUCED SWITCHING LOSS. .. commutations) causes a considerable switching loss In [16], the authors have used space vector PWM approach of ZCMV switching state selection and proposed a method of eliminating CMV spikes for a