Observations on the design of distributed armature winding by poly phase symmetrisation

Abstract

The generalised process of designing distributed poly-phase armature windings by the technique of symmetrization offers special advantages in developing dedicated machines for operation with non-sinusoidal supplies. Principles of symmetrization have been reviewed with special reference to 3-phase windings and important rules governing the applications of the process have been enumerated, both with reference to single-speed balanced and unbalanced windings as well as multi-speed windings. Although such special windings in general, have wider harmonic spectra compared to standard designs, a judicious selection of symmetrised windings can, in fact prove beneficial in specific cases. The paper attempts to lay down the procedure for systematic design of 3-phase symmetrised windings. © 1991 by Hemisphere Publishing Corporation.