Synthesis and analysis of harmonic-free three-phase inverters

A systematic and straightforward procedure is developed for the synthesis and analysis of DC-to-three-phase-AC switched-mode converters. The procedure is useful in the derivation and design of converters with desirable characteristics such as harmonic-free power processing and low component stresses. Application of this procedure to a basic class of DC-to-three-phase-AC converters, namely, the four-topology single-inductor three-capacitor class leads to twenty-six converters in this class. This derivation is based on the assumption of processing power without the generation of supply-frequency harmonics. Other characteristics of converters include their ability to provide variable amplitude of output voltages both below and above the DC input value, variable frequency, and low component stresses