This study proposes a modified modulation scheme based on the phase-shifted pulse-width modulation (PS-PWM) method to improve the output
performance and reduce the switching loss in cascaded H-bridge multilevel inverters. The PS-PWM method is one of the most popular modulation
schemes; however, it generates significant switching loss, which leads to the failure of the power semiconductor switch. Various studies have
proposed modulation schemes to reduce the switching loss. The clamped discontinuous PWM (DPWM) method achieves the best switching loss
reduction performance in comparison with other modulation schemes. However, the clamped DPWM method has low output characteristics, such as
total harmonic distortion. The proposed modulation scheme achieves the same switching loss reduction and improved output performance by
modifying the dwelling time order. By conducting simulations and experiments, the proposed clamped DPWM method was compared with the original
clamped DPWM method.