A practical implementation of online computational tool for unbalanced voltage supply detection in induction motor

This work presents an computational tool of unbalanced voltage supply detection on-line in induction motor. A technique based on Goertzel algorithm has been used to compute the desired component frequency for real time application. The computer algorithm has been implemented in a low cost microcontroller (Arduino). Two successful methods have been used for condition monitoring of induction motors; the first one is based on Park´s vector to calculate the negative component of stator´s currents; the second one is dealing with vibration analysis to detect twice line frequency component in the induction motor vibration. Experimental results are provided throughout the paper, to underpin the theoretical analysis.