Fault analysis of diode clamped inverter based induction motor drive

In this article Fault analysis in 3 level and 5 level inverter to drive Induction motor is presented. Induction motors are widely used in industrial applications for their intrinsic ruggedness and reduced cost. Recently, the use of adjustable speed drives has spread in many applications. Most of the industrials motors are used today are in fact induction motors. Induction motors have been used in the past mainly in applications requiring a constant speed because conventional methods of their speed control have either been expensive or highly inefficient. Multilevel inverters have a high number of switching states so that the output voltage is stepped in smaller increments. This allows mitigation of the harmonics at low switching frequencies thereby reducing switching losses. Almost 38% of faults in industrial loads like variable speed ac drive. IGBT's are used in almost all converters as power handling capability is high. It is estimated that among all types of faults in variable speed ac drives in industry, 10 μs. The performance of the system is analyzed by adopting MATLAB/SIMULINK software.