Surveillance et diagnostic des défauts du convertisseur Application à machine asynchrone
Abstract
Static electric power converters have experienced remarkable development in terms of performance (switching frequency and switched power) and in terms of structures (multi-level inverters, matrix converters). This development is mainly due to advances in power electronics component technology in recent decades. With the expansion of the use of AC machines, DC-AC converters (inverters) have become the most popular. Furthermore, these converters can be exposed to various control or power faults. These faults must be detected quickly in order to avoid the total destruction of the converter, which makes preventive diagnosis of this converter essential. This work is devoted to the study of an aspect of modeling and diagnosis of the static converter. Thus, a main topic dealt with in this thesis which is based on a fault detection method in the PWM converter supplying the machine will be studied and simulated based on the analysis of the deviations of the Park contour of the stator current
Description
Keywords
machine, inverter, open transistor, fault, diagnosis.