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Fault detection and isolation on a PWM inverter by knowledge-based model

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3 Author(s)
Peuget, R. ; Lab. d''Electrotech., Inst. Nat. Polytech. de Grenoble, France ; Courtine, S. ; Rognon, Jean-Pierre

This paper presents an approach based on knowledge models to detect and isolate faults in a pulsewidth modulation inverter supplying a synchronous machine. These faults do not affect the system protection. A diagnosis system which uses only the input variables of the drive is presented. It is based on the analysis of the current-vector trajectory and of the instantaneous frequency in faulty mode. These two methods have been successfully applied to an experimental system

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Industry Applications, IEEE Transactions on  (Volume:34 ,  Issue: 6 )