On-Line Detection of Rotor Broken Bars of Three Phase Induction Motor by Digital Signal Processing Method

The paper discusses development and practical implementation of a novel recent advanced digital signal processing technique (DSPT) based system for the on-line real time condition monitoring and performance determination on rotor broken bar of three phase induction motor. The electrical signals are on-line acquired and digital processed to obtain the condition monitoring of machine status. This paper presents a reliable advance and most accurate rotor fault condition monitoring system using an ordinary hardware and LABVIEW software. The National Instruments DAQ used have 32 AI (16-bit, 2 Ms/s). This paper presents the system and results to monitor rotor winding faults using motor current signature analysis. The three phase current and voltage signals are acquired in healthy and faulty rotor conditions at load conditions. A number of tests carried out on small-size 415 V, 2.1 A, 1.00 HP, three phase induction motor highlight the excellent promptness in detecting faults, and very good diagnostic performance.