Single-phase and two-phase induction machines are widely used in commercial applications. The developed methods for the analysis of the single-phase induction motor, i.e. forward-backward field, symmetrical components and cross-field methods, can be adapted for modelling the MMF harmonic effects. This paper presents a review on all these methods that demonstrates the equivalence between models and shows how the equivalent circuit elements can be interchanged from one method to another.

Keywords: Single-phase induction motors, MMF harmonics.