TRANSIENT ANALYSIS OF CAGE INDUCTION MACHINES UNDER STATOR, ROTOR BARAND END RING FAULTS

An analysis method Is developed for modeling of multi phase cage induc tion motors with asymmetry in the stator, arising due to an interturn fault resulting in a disconnection of one or more coils making up a po rtion of a stator phase winding and any distribution and number of rot or bar and end-ring failures. The approach, based on the winding funct ions, makes no assumption as to the necessity for sinusoidal MMF and t herefore include all the space harmonics in the machine, Simulation an d experimental results confirm the validity of the proposed method.