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ABSTRACT
This paper proposes a new way in which the energy transfers associated with commutation in a machine/converter system might be supplied by electromechanical means. Specifically, the internally generated voltage of the machine is to be tailored so that the terminal voltage matches the output waveforms of the switching converter. In order to determine what generated voltage is required, a model of a synchronous machine has been developed which takes into account the possible presence of time harmonics in the armature voltages and currents. The model represents the machine as a series of independent linear circuits with one linear circuit representing a single time harmonic. Methods for calculating lumped parameters used in the model are presented. Also presented is a procedure for using the model to design a machine that is well adapted for use with a static frequency converter.