AI TECHNIQUES IN INDUCTION MACHINES DIAGNOSIS INCLUDING THE SPEED RIPPLE EFFECT

Various applications of artificial intelligence (AI) techniques (exper t systems, neural networks, and fuzzy logic) presented in the literatu re prove that such technologies are well suited to cope with on line d iagnostic tasks for induction machines. The features of these techniqu es and the improvements that they introduce in the diagnostic process are recalled, showing that, in order to obtain indication on the fault extent, faulty machine models are still essential, Moreover, bg the m odels, that must trade off between simulation result effectiveness and simplicity, it is possibly to overcome crucial points of the diagnosi s, With reference to rotor electrical faults of induction machines, a new and simple procedure based on a model which includes tile speed ri pple effect is developed. This procedure leads to a new diagnostic ind ex, independent of the machine operating condition and inertia value, that alloys the implementation of the diagnostic system with a minimum configuration intelligence.