2019•Unpublished venueRequires access
Polyphase Systems
James L. Kirtley
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Abstract
Most electric power applications employ three phases, that is, three-separate power-carrying circuits, with voltages and currents staggered symmetrically in time are used. Three-phase systems are the most common, but there are situations in which a different number of phases may be used. Two-phase systems have a simplicity that makes them useful for teaching vehicles and for certain servomechanisms. Six-phase systems have been proposed for very high power transmission applications. Polyphase systems are qualitatively different from single-phase systems. In some sense, polyphase systems are more complex, but often much easier to analyze. It is interesting to note that physical conversion between polyphase systems of different phase number is always possible. The two-phase system is the simplest of all polyphase systems to describe.