A power converter with reversible power flow which transforms a.c. or d.c. power of one form and voltage level to a.c. or d.c. power of another form and voltage level is presented. Use of a modulated high frequency link between two sets of matrices of switches at the output terminals allows the application of active filtering processes, the elimination of all low frequency filters and transformers; it allows furthermore, arbitrary and independent programming of the power factors at the two ports. Low weight and cost of apparatus is enhanced by the time proven reliability of its significant functional elements. The potential for the construction of megawatt capacity systems is derived from experience with the basic class of those converters and is reinforced by the report of reduction to practice of some of the described techniques in the form of a 3 kW model in a companion paper.
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