hamed Gorgin - School of Electrical Engineering, Sharif University of Technology, Tehran, Iran.
pedram Sotoodeh - School of Electrical Engineering, Sharif University of Technology, Tehran, Iran.
hashem Oraee - School of Electrical Engineering, Sharif University of Technology, Tehran, Iran.

In this paper, a detailed analytical model for dynamic analysis of the Brushless Doubly-Fed Machine is presented. The model is capable to predict the machine behavior under different modes of operation including: simple induction mode, cascade mode and synchronous mode, both with and without winding faults and unbalanced excitations. The proposed approach employs the basic principles of the generalized harmonic theory for calculating self inductances and mutual inductances of circuits with any distribution of conductors. Dynamic equations of modified coupled-circuit method are then solved to compute the currents flowing in the stator windings and rotor loops.