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Fault Diagnosis Methods for Three Phase PWM Inverter Fed Induction Motor

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In the recent years and with the strong technological development of semi conductors, the three phase induction motor is one of the most used electric machines in variable speed system in the different field of industry. Good reability of power electronic systems is essential not only for security system and for people but also to reduce coasts of maintenance. The rapid and accurate diagnosis of any system employing electrical drive system remains one of the current problems. This paper presents three methods and fault detection and isolation of an AC drive system under open fault conditions in the inverter through modeling and simulation of the system. The proposed methods are achieved by using open circuit in the inverter. The obtained simulation results show clearly the possibility of extracting signatures to detect and isolate faults.
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Diagnosis; Fault Detection; Isolation; Inverter; Induction Motor; Simulation

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