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Abstract

This paper presents the investigation of performance in inverters and induction motor with fault condition when the system is framed as two parallel inverters feeding a single induction motor. The two inverters share the total load current drawn by induction motor such that the rating of power devices used in inverters gets reduced. Diode clamped multi-level inverter consists of power switches and switch faults takes place very often due to many reasons in circuit behavior. Diode clamped inverter is controlled using asymmetrical PWM technique. Presence of open type of switch fault makes inverter malfunction and might cause load characteristics to disturb. Examination was carried out in this paper for line currents, line voltages and phase voltages of both parallel placed inverters along with characteristics of induction motor with fault in inverter switch. Proposed work was carried out using MATLAB/SIMULINK software and results were presented.