Orthogonal Axis Models for Asymmetrically Connected Induction Machines

This paper presents a new method for the transient analysis of induction machines with asymmetrical connection of the stator phases. The method is based on the unified theory of electrical machines and sets forth a convenient framework for depicting the machine together with the constraints of the system to be studied. Equivalent d-q-0 circuits are deduced for a number of specific connections and results of an analog computer simulation used to illustrate the proposed procedure.