SPACE PHASOR TRANSIENT ANALYSIS OF ASYMMETRICAL A.C. MACHINES WITH SPACE HARMONICS

The paper develops the Space Phasor Theory for obtaining the harmonic phasor equations of a balanced winding of m asymmetrical phases. Some Equivalence Principles are stated and some equivalent harmonic space phasors of e.m.f. and voltage are defined. This enables us to analyse the effect of all harmonics on a winding using few equations. The authors give a physical interpretation of the harmonic phasor equations and represent them by means of space phasor diagrams. A phasor study of an asynchronous machine with harmonics of both the winding distribution and air-gap irregularities is also given,