Analysis of multi-phase induction machines with winding faults

The paper shows how the techniques of generalised harmonic analysis may be used to simulate the steady-state behaviour of a multi-phase cage induction motor with any form of open-circuit or short-circuit fault in the stator winding. The analytical model is verified using a 4-pole machine with a 48-slot stator. Each coil of the stator winding of this machine is brought out to a patch-board that enables the stator to be configured for single-phase, two-phase, three-phase, four-phase, six-phase or twelve-phase excitation. Experimental results are compared with computer predictions for a six-phase machine with both open-circuit and short-circuit faults