Analyzing and Detection of Rotor Faults in Squirrel Cage Induction Motor Drives Using MATLAB

Induction motors are becoming familiar these days and is being employed in most of the industrial processes. This “Analyzing And Detection Of Rotor Faults In Squirrel Cage Induction Motor Drives Using Matlab” presents a simulation of detecting the rotor faults such as broken rotor bars or end rings in squirrel cage induction motor drives. It enables detection of those faults, which may arise during the lifetime of the motor, although special attention was given to identify broken rotor bars at an early stage of the fault propagation. This method is based on analysis of stator current frequency spectrum and the rotor speed approach, which can be measured without disturbing normal motor operation, therefore it is completely non-invasive and easy to implement in industrial environments. The stator current undergoes FFT analysis and the output of the analysis gives us the condition of the induction motor under operation. The possible outputs from the analysis can be either the motor running in healthy state or warning state or faulty state. The state of the motor is sent to the supervision station through GSM so that the operator can take necessary action.