SYNTHESIS AND ANALYSIS OF HARMONIC-FREE 3-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.