Abstract

Armature winding of a small sized three-phase a. c. machine is preferably used with a single-layered and full pitched coils, in order to reduce manufacturing cost. But, this winding produces a great deal of the higher harmonic components of the magnetic field and causes stray losses, magnetic noises and parasitic torques.This paper proposes the equivalent short pitch winding for the single-layered coils and the characteristics improvement.

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