On line Monitoring of open switch Fault in the Association PWM Inverter-Induction Machine Using Fuzzy Logic Approach

The Inverters-Induction machines associationsare essential systems in many industrial processes. Thereforeonline monitoring of these associations is becoming more andmore important. In this work we are presents a reliablestrategy for detection of open switch in PMW inverter faultsusing the fuzzy logic approach. The principle of thesuggested approach strategy is based on the acquisition ofstator currents, for calculate the residuals currents betweenthe stator currents of reference model system and the statorcurrent of real system (Inverter- Induction Machine). Theobtained residues will be used as input of the fuzzy logicblock which will provide to its output a new signalcharacterizing the decision of the healthy or faulty ofinverter state. The methodology is applied and is validatedunder MATLAB/ SIMULINK