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This document analyzes and compares pulse width modulation (PWM) strategies for multicarrier neutral point clamped (NPC) and cascaded multilevel inverters. It presents analytical solutions showing that the alternative phase opposition disposition (APOD) PWM strategy for NPC inverters produces the same spectral components as phase shifted carrier PWM (PSCPWM) for cascaded inverters, when carrier frequencies achieve the same number of total switch transitions per fundamental cycle. This understanding leads to

Author

Kanna Thanga Raj

Language

EN