Eui-Jae Lee and Kyo-Beum Lee, "Performance Improvement of Cascaded H-bridge Multilevel Inverters with Modified Modulation Scheme," Journal of Power Electronics, in press. -SCIE > Paper

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International Journals Eui-Jae Lee and Kyo-Beum Lee, "Performance Improvement of Cascaded H-bridge Multilevel Inverters with Modified Modulation Scheme," Journal of Power Electronics, in press. -SCIE

2021

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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.

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