This paper analyzes losses in accordance with the
Pulse Width Modulation(PWM) method of cascaded NPC/H-bridge
inverter. Unbalance of loss is occurred in each cell of the Cascaded
NPC/H-bridge inverter according to the PWM method. It restrict
output power and switching frequency. The PWM method will be
used phase-shift and level-shift with carrier based SPWM. The
losses of each cell is verified by PSIM simulation.