Possibilities of Decreasing Induction Motor Bearing Currents

This paper describes possibilities for reduction of bearing currents in induction motors. Growing usage of motors running with variable speed drives, the problems of bearing currents and related damages have become a significant issue in industry. Bearing currents cause a higher portion of faults in induction machines. Therefore, the maintenance question is getting a great importance. The paper addresses a problem of bearing currents and lists different methods for their avoidance. This study gives a comparison of the methods, discussing advantages and disadvantages of each of them.