A New Method for Diagnostics of Faults of Three-phase Squirrel Cage Asynchronous Motor

Asynhronous motors are the most widely used motors in the industry. They are found in every point of production lines since they are in a very advantageous structure. It is desirable to detect faults of these motors in a quick and easy way. In this article, the determination of rotor fault of asynchronous motors by acoustic measurements is investigated. Ac driver, motor breaking unit and microphone were used in the test circuit alongside a healty and faulty motor. Changes in the time domain using the matlab software, changes in the frequency domain were obtained by making fast fourier transform. FFT differences in sound files optained from operation in different speed and torque values of motors with rubost and broken rotor bar motors were detected and interpreted.